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Altai Super WiFi Proposal
Altai Super WiFi Network Solution Proposal For [Project’s Name]
Prepared for:
[Partner’s Company Name]
Prepared by: [Altai Person’s Name] [Altai Person’s Title] Altai Technologies Limited 2/F., East Wing, Lakeside 2, Hong Kong Science Park, Shatin, Hong Kong Tel: (852) 3758 6000 Fax: (852) 2607 4021 Date: May 9, 2012
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Altai Technologies Ltd.
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Altai Super WiFi Proposal
Confidentiality Statement All information contained in this document is provided in confidence for the sole purpose of early stage network planning and shall not be used for other purpose. This document must not be disclosed either wholly or in part to any other party, other than the addressee on the cover of this document, without prior permission in writing by Altai Technologies Ltd. The content of this document represents a definition of the type of products that Altai can provide. This document, however, does not constitute Altai’s conditions of contract, nor does it represent an offer. Provision of services consequent to any proposal by Altai will be subject to written agreements between the parties for the purpose.
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Altai Technologies Ltd.
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Altai Super WiFi Proposal Table of Content
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Executive Summary..........................................................................5 Company Overview...........................................................................5 System Overview...............................................................................6 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 4.1 4.2 4.3 4.4 4.5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11
Network Component............................................................................................ 6 Altai A8n Super WiFi Base Station......................................................................7 Altai A8-Ein Super WiFi Base Station..................................................................8 Altai A8in Super WiFi Base Station......................................................................9 Altai A2 WiFi Access Point/ Bridge....................................................................10 Altai A2e WiFi Access Point / Bridge..................................................................11 Altai B5 Wireless Bridge....................................................................................12 Altai C1n Super WiFi CPE.................................................................................13 Altai U1 Super WiFi USB Client.........................................................................14 Altai Wireless Management System (AWMS)....................................................15 Altai Service Controller 200...............................................................................17 Altai Service Controller 7000.............................................................................19
Network Design...............................................................................20
Access Coverage Architecture...........................................................................20 Backhaul Architecture........................................................................................23 Coverage, Throughput and Capacity Enhancement..........................................27 Indoor Coverage................................................................................................ 28 Service Controller.............................................................................................. 30
Proposed Solution..........................................................................32
Introduction........................................................................................................ 32 Coverage Environment......................................................................................32 Coverage Area and Quantity Required..............................................................34 Backhaul Throughput......................................................................................... 35 Internet Outlet.................................................................................................... 36 Backhaul Equipment..........................................................................................37 Concurrent User Capacity.................................................................................38 CPE Equipment................................................................................................. 38 Subscriber Capacity.......................................................................................... 39 Service Controller.............................................................................................. 39 Summary of Equipment Required......................................................................40 Summary of Project Requirement......................................................................42
Feature Description and User Benefit...........................................44
Super Long Range and Large Coverage...........................................................44 High Throughput at Range................................................................................44 High User Capacity............................................................................................ 45 Superior Interference Mitigation.........................................................................45 Better Network Throughput Optimization...........................................................46 Better Near-to-Far End Coverage......................................................................46 Flexible Deployment..........................................................................................47 Highly Cost Effective.......................................................................................... 47 Better Link Performance....................................................................................48 Highly Resilient.................................................................................................. 48
Product Specifications...................................................................49
Altai A8n Super WiFi Base Station....................................................................49 Altai A8-Ein Super WiFi Base Station................................................................50 Altai A8in Super WiFi Base Station....................................................................51 Altai A2 WiFi Access Point/Bridge.....................................................................52 Altai A2e WiFi Access Point/Bridge...................................................................53 Altai B5 Wireless Bridge....................................................................................54 Altai C1n Super WiFi CPE/AP...........................................................................55 Altai U1 Super WiFi USB Client.........................................................................56 Altai Wireless Management System..................................................................57 Service Controller 200.......................................................................................58 Service Controller 7000.....................................................................................59
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Altai Technologies Ltd.
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Altai Super WiFi Proposal
1. Executive Summary Altai is pleased to present the Altai Outdoor Super WiFi solution proposal to you. This proposal outlines how Altai provides a reliable and flexible WiFi solution with large coverage, high throughput and large saving in cost of deployment. Altai Super WiFi solution provide both 802.11b/g/n access and 802.11a/n backhaul sides, using ‘state-of-the-art’ super WiFi base station and award winning Smart Antenna technologies. The system consists of Altai A8n*/A8-Ein*/A8in* Super WiFi Base Station, Altai A2/A2e WiFi Access Point/ Bridge, Altai B5 Wireless Bridge, Altai C1n*/C1an# Super WiFi CPE, Altai U1 Super WiFi USB Client, Altai Wireless Management System (AWMS) and other third party backend equipment as required. Altai, as a product designer and manufacturer, will concentrate on the product technology and the supply and warranty of the products, while our partner will provide engineering support services including network design, site survey, field test, equipment installation and deployment, on-site maintenance as well as future upgrade planning. Altai is eager to provide a professional training on the engineering support services including those services mentioned above. * Available from Q3 2012 onwards, the 802.11b/g equivalent models A8/A8-Ei/A8i/C1 are available now # Available from Q3 2012 onwards
2. Company Overview Altai Technologies is a privately held high technology company focused in design, development, and marketing of innovative outdoor wireless broadband solution. The flagship product, the A8n Super WiFi base station, is mainly deployed in outdoor environments to provide city-wide or large area WiFi coverage for users to enjoy ubiquitous broadband access. This award-winning base station effectively improves the non-line-of-sight WiFi signal coverage to an extended area of 500 meters in radius, by minimizing the interference effect of other signals in the unlicensed frequency spectrum. Altai’s ground-breaking long range WiFi technology has set a new standard in the industry. The coverage area is 10 times larger than our competitors and thus requires less capital investment and operating resources in the wireless network infrastructure (lower CAPEX and OPEX). Altai provides a cost-effective, scalable, reliable, and quick deployment wireless solution to service providers. As part of the industry’s continued recognition of Altai’s innovative wireless technology, Altai has been awarded the 2011 Hong Kong ICT Awards, 2009 Hong Kong ICT Awards and the 2007 Hong Kong Awards for Industries: Technological Achievement Grand Award by the Hong Kong Trade and Industry Department. In 2006, Altai also won the Asia Pacific ICT Awards Gold Award, and Hong Kong ICT Awards, which included Award of the Year, Grand Award, and Gold Award in Wireless Technology category. Altai’s A8 Super WiFi base station product has been deployed globally, including cities in the U.S. (Silicon Valley, New York City), China (Beijing, Hangzhou, Jiangxi, Shandong and Shenzhen), Malaysia (Sarawak, Ipoh), Vietnam, Cambodia, Nepal, Mexico, Panama, Jamaica, Brazil, Middle East, Europe and other Asian-Pacific countries.
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Altai Technologies Ltd.
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Altai Super WiFi Proposal 3. System Overview 3.1 Network Component The core components which build up a city WiFi network consist of:
Altai A8n Super WiFi Base Station Altai A8-Ein/A8in Super WiFi Base Station Altai A2/A2e WiFi Access Point/Bridge Altai B5 Wireless Bridge Altai C1n/C1an Super WiFi CPE Altai U1 Super WiFi USB Client Altai Wireless Management System (AWMS)
Optional items that can be purchased from Altai include:
Service Controller 200 or 7000 ESS 5.x Site Survey Professional Program
Other hardware will be provided by customer including application servers such as VLAN switch, RADIUS/billing and database servers for authentication and accounting purposes and the firewall etc. A typical city WiFi network can be divided into three parts, namely the core network, the backhaul and the access. The corresponding Altai components are shown in Figure 1 below and overviews on each component are to be followed. The specifications of the components are shown at the end of this proposal. Figure 1: Altai Super WiFi Network Components
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Altai Super WiFi Proposal 3.2 Altai A8n Super WiFi Base Station The Altai A8n Super WiFi Base Station is the world’s leading 802.11n WiFi outdoor access point optimized for maximum coverage and highest throughput from a minimum number of installation sites. The Altai A8n has been designed to provide industry best coverage and capacity without complicated networking protocols or the need for a high density of transmitters. The A8n is a multi-radio base station utilizing 8x8 MIMO smart antenna technologies and a patented signal processing algorithm to provide the industry’s best coverage per base station, especially in non-line-of sight (NLOS) environments. The multiple antennas of the A8n can be configured to provide coverage that is optimized for area, pattern and elevation. Using up to 80% fewer access points than other WiFi systems to cover the same area enables less complex network design and provides lower latency for improvement in handling realtime applications such as VoIP and video streaming. Whether deployed for a single location, a campus area or citywide network coverage, the Altai A8n is designed to minimize the total cost of ownership with significant savings in network equipment, broadband access, planning, site acquisition and installation. The Altai A8n can serve as last mile infrastructure for a wide range of wireless broadband access applications. It provides low deployment cost and fast provisioning of WiFi systems with the greatest coverage and bandwidth per installed base station. The A8n Super WiFi Base Station can be deployed in conjunction with existing 3G networks to provide low cost high bandwidth mobile data offloading solution. The A8n can be co-located with existing 3G cell sites allowing immediate WiFi provisioning at much lower acquisition and operating costs. Feature Highlight
Extended coverage in a Non-Line-of-Sight (NLOS) environment which matches the foot print of most 3G deployments in dense urban environments High 11n throughput capacity up to 300 Mbps 4 –sector x dual-diversity advanced Smart Antenna Technology to provide flexible 90 to 360-degree and large vertical beamwidth coverage with minimal holes in dense urban environments Multi-radio 8x8:2 MIMO platform maximizing both uplink/downlink performance and access redundancy Link integrity, backhaul link self-healing and access link safe mode Adaptive interference control to mitigate the influence from the surrounding interfering sources Standard 802.11b/g/n access and 802.11a/n backhaul Giga Ethernet or integrated 802.11a/n wireless backhaul Flexible antenna deployment for various site conditions Remote configuration through the Altai Wireless Management System (AWMS)
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Altai Technologies Ltd.
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Altai Super WiFi Proposal 3.3 Altai A8-Ein Super WiFi Base Station The Altai A8-Ein Super WiFi Base Station is the world’s leading 802.11n WiFi outdoor access point with integrated multi-beam antenna array optimized for maximum coverage and highest throughput from a minimum number of installation sites. This eliminates external RF cabling between base station and antennas and makes installation simple. The A8-Ein is a multi-radio base station utilizing 8x8 MIMO smart antenna technologies and a patented signal processing algorithm to provide the industry’s best coverage per base station, especially in non-line-of sight (NLOS) environments. The multi-beam antenna array of the A8-Ein is designed to provide up to 5 times the range and 20 times the per site coverage as traditional access point. Accordingly, up to 95% fewer installation sites for the same coverage area. Whether deployed for a single location, a campus area or city-wide network coverage, the Altai A8-Ein is designed to minimize the total cost of ownership with significant savings in network equipment, broadband access, planning, site acquisition and installation. The Altai A8-Ein serves as last mile infrastructure for a wide range of wireless broadband access applications. It provides low deployment cost and fast provisioning of WiFi systems with the greatest coverage and bandwidth per installed base station. The A8-Ein Super WiFi Base Station can also be deployed in conjunction with existing 3G mobile networks to provide low cost high bandwidth mobile data offloading solution. The A8Ein can be co-located with existing 3G cell sites allowing immediate WiFi provisioning at much lower acquisition and operating costs. Feature Highlight
Base station and antenna array in one integrated unit, eliminating RF cabling work. Simple installation at rooftop, wall, tower and lamppost High 11n throughput capacity up to 300 Mbps Extended coverage in a Non-Line-of-Sight (NLOS) environment which matches the foot print of most 3G deployments in dense urban environments Multiple 8x8:2 MIMO Smart Antenna Technology to provide superior signal strength and link budget in dense urban environments Link integrity, backhaul link self-healing and access link safe mode Adaptive interference control to mitigate the influence from surrounding interfering sources Standard 802.11b/g/n access and 802.11a/n backhaul Giga Ethernet or integrated 802.11a/n wireless backhaul Remote configuration through the Altai Wireless Management System (AWMS)
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Altai Technologies Ltd.
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Altai Super WiFi Proposal 3.4 Altai A8in Super WiFi Base Station The Altai A8in Super WiFi Base Station is the world’s leading 802.11n WiFi outdoor access point with integrated base station, antennas and RF cabling optimized for long range 360-degree access coverage and with the highest possible throughput using a minimum number of installation sites. One of the benefits of A8in is its simple installation design – the RF cabling work is no longer necessary, no extra installation is required. The A8in is a multi-radio base station utilizing 8x8 MIMO smart antenna technologies and a patented signal processing algorithm to provide the industry’s best coverage per base station, especially in non-line-of sight (NLOS) environments. Using up to 80% fewer access points than other WiFi systems to cover the same area enables less complex network design. Whether deployed for a single location, a campus area or city-wide network coverage, the aesthetic outlook of Altai A8in can be accommodated to various site conditions, especially suitable for street level lampposts and rooftops installation in urban area. The A8in is designed to minimize the total cost of ownership with significant savings in network equipment, broadband access, planning, site acquisition and installation. The Altai A8in serves as last mile infrastructure for a wide range of wireless broadband access applications. It provides low deployment cost and fast provisioning of WiFi systems with the greatest coverage and bandwidth per installed base station. The A8in Super WiFi Base Station can be deployed in conjunction with existing 3G mobile networks to provide low cost high bandwidth mobile data offloading solution. The A8in can be co-located with existing 3G cell sites allowing immediate WiFi provisioning. Feature Highlight
Base station and antenna in one integrated unit, eliminating RF cabling work. Simple installation at rooftop, lamppost, tower, wall and indoor environments High 11n throughput capacity up to 300 Mbps data rate Extended coverage in a Non-Line-of-Sight (NLOS) environment Dual-diversity advanced Smart Antenna Technology to provide 360-degree coverage with minimal holes in dense urban environments Built-in 5 GHz radio with external 5 GHz antenna port for simple and flexible backhauling Multiple 8x8:2 MIMO platform maximizing both uplink/downlink performance and access redundancy Adaptive interference control to mitigate the influence from surrounding interfering sources Standard 802.11b/g/n access and 802.11a/n backhaul Giga Ethernet or integrated 802.11a/n wireless backhaul Link integrity, backhaul link self-healing and access link safe mode Remote configuration through the Altai Wireless Management System (AWMS)
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Altai Super WiFi Proposal 3.5 Altai A2 WiFi Access Point/ Bridge The Altai A2 WiFi Access Point/Bridge is designed to be used in Altai Super WiFi systems to increase system capacity, extend coverage, fill-in areas of low or blocked signals caused by obstructions and bridge wirelessly to remote site. It is capable of providing the highest possible data throughput and capacity that the 802.11n standards can offer, and at the same time is backward compatible to standard 802.11a/b/g. The A2 employs the cellular concept of expanding system capacity by dividing the coverage area of an A8 Super WiFi Base Station. It enables network operators to take advantage of the cost savings provided by the A8 Super WiFi Base Station’s 10X greater coverage area when a WiFi system is initially installed. As system capacity needs to increase, the A2 Access Point/ Bridge can be used to double the user capacity. The A2 can be installed exactly where the capacity requirement is the greatest. This will create even greater savings compared to other competitive systems. The A2 Access Point/Bridge has both a high capacity 2.4 GHz (2x2 802.11b/g/n) broadcast radio and a 5 GHz (2x2 802.11a/n) backhaul radio to enable it to function not only to expand in-system capacity but also to extend the range of a WiFi system. Being equipped with a builtin 5 GHz backhaul radio, the A2 can be connected directly to an A8 5 GHz bridge radio to create a high capacity WiFi system. The A2 Access Point/Bridge can be used as a repeater to overcome low signal areas that are found in every system. It can be used to reach areas that are blocked by terrain or buildings, or be used to strengthen signals into areas of heavy foliage. The A2 can be used as a standalone Access Point for smaller systems. With built-in backhaul capability, it can be used to create simple and efficient 1 to 3 cell systems that can be a cost effective alternative for smaller coverage areas and systems where the coverage of an A8 Super WiFi Base Station is not required. A2 Access Point/Bridge provides the most cost effective and versatile way to enhance a WiFi in terms of its capacity, coverage or range. When combined with the A8 Super WiFi Base Station, it can create possibly the most cost-effective high capacity WiFi network system. Feature Highlight
Multi-operating modes allowed: AP, bridge, repeater or CPE 2 x 2 MIMO for both 2.4GHz (802.11b/g/n) and 5 GHz (802.11a/n) radios IP-67 rated carrier grade 802.11b/g/n AP for both outdoor and indoor applications Increase system capacity under the coverage area of A8 Super WiFi Base Station Fill-in coverage area in challenging RF environment Fast Ethernet or 2 x 2 802.11a/n wireless backhaul PTP and PTMP bridging with built-in dual polarized panel antenna Light weight with built-in lightning protection Easy installation & web-based management
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Altai Super WiFi Proposal 3.6 Altai A2e WiFi Access Point / Bridge The Altai A2e WiFi Access Point/Bridge is designed to be used in Altai Super WiFi systems as high capacity directional access point and long range-bridge with flexible external high gain antennas. It is capable of providing the highest possible data throughput and capacity that the 802.11n standards can offer, and at the same time is backward compatible to standard 802.11a/b/g. The A2e can be used as a standalone access point for directional coverage. With built-in 2.4 GHz high gain panel antenna, it can be used to provide simple and cost effective long range sector coverage. The single-sided coverage makes installation simple by just mounting at building wall side. As the system capacity of a network covered by the A8 Super WiFi Base Station needs to increase, the A2e Access Point/Bridge can be used to double the user capacity, or to increase the network throughput by 6 times supported by the 11n. The A2e can be installed exactly where the capacity requirement is the greatest, with appropriate fast Ethernet or 5 GHz wireless backhaul. As a whole, it enables network operators to take advantage of the cost savings provided by the A8 Super WiFi Base Station’s 10X greater coverage area when a WiFi system is initially installed, and to subsequently enhance the coverage and capacity where and when it is needed. The A2e Access Point/Bridge has both a high capacity 2.4 GHz (2x2 802.11b/g/n) broadcast radio and a 5 GHz (2x2 802.11a/n) backhaul radio. The 5 GHz radio provides 2 external antenna ports connection which allows user to choose exactly the type of high gain panel antennas they wanted for distance and throughput exceeding what A2’s built-in antenna allows. Besides the point-to-point long range bridging uses, the A2e also supports point-to-multi-point high throughput bridging. This is a cost effective method in building high definition video surveillance network within building complex, without the costly cabling. A2e Access Point/Bridge provides the most cost effective and versatile way to build the backhaul network and to enhance a WiFi system capacity. When combined with the A8 Super WiFi Base Station, it can create possibly the most cost-effective high capacity WiFi network system. Feature Highlight
Built-in 2.4 GHz high gain panel antenna for high capacity directional AP applications External 5 GHz high gain panel antenna for long range high throughput PTP/PTMP bridging 2 x 2 MIMO for both 2.4 GHz (802.11b/g/n) and 5 GHz (802.11a/n) radios IP-67 rated carrier grade product for both outdoor and indoor applications Multi-operating modes allowed: AP, bridge, repeater or CPE Increase system capacity under the coverage area of A8 Super WiFi Base Station Fast Ethernet or 2 x 2 802.11a/n wireless backhaul PTP and PTMP bridging with optional external dual polarized panel or omni antennas Light weight with built-in lightning protection
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Altai Super WiFi Proposal 3.7 Altai B5 Wireless Bridge The Altai B5 Wireless Bridge is designed to be used in Altai Super WiFi systems to provide carrier-grade ultra long range and high throughput backhaul bridging. The Altai B5 comprises of a number of highperformance antenna options which operate in both LOS and NLOS environments, in both licensed and unlicensed frequency bands. Featuring highest performing hardware and operating system coupled with most innovative radio technology providing with best sensitivity, increased output power across all modulations and wide dynamic range, Altai B5 represents a perfectly balanced solution for any type of Point-to-Point connectivity. The Altai B5 is a wireless Point-to-Point solution which combines high-speed capability, up to 240 Mbps throughput, with a rich set of best-in-class features and benefits such as leadingedge radio protocols providing unrivalled spectral efficiency and wireless transmissions over distances in excess of 80 km. Altai's diverse range of solutions enables Service Providers of all types to build higher capacity networks with even fewer network elements, thereby significantly reducing their overall CAPEX and subsequent OPEX throughout the life of their network. The Altai B5 product family is an optimal solution for mobile operators and all other service operators requiring multi-megabit capacity for their backhaul links. In all these applications, our solutions offer operational cost saving benefits such as quick deployment, ease of configuration and the ability to upgrade existing infrastructures via software download to cater for new requirements (i.e. “pay as you grow”). Altai B5 Wireless Bridge provides the most cost effective and versatile way for backhaul provisioning in terms of its throughput capacity or range. When combined with the A8 Super WiFi Base Station, it can create possibly the most cost-effective high capacity wireless broadband network system. Feature Highlight
Configurable 4.9 to 5.8 GHz frequency band Possible operational distances in excess of 80 km High capacity – up to 240 Mbps throughput 2 x 2 MIMO innovative technology “Pay as you grow” software upgradeable capacity feature 5/10/20/40 MHz channel widths Unique plug & play out-of-box ultra-long LOS and NLOS backhaul solution Gigabit Ethernet port and flexible uplink/downlink reallocation Advanced Quality-of-Service support, reliable and robust design Other B5 3.5 GHz series and B5 PTMP series are available
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Altai Super WiFi Proposal 3.8 Altai C1n Super WiFi CPE The Altai C1n WiFi CPE is designed as an essential component in the Altai Super WiFi system to extend outdoor WiFi coverage into indoor areas for broadband connectivity. The Altai C1n employs patented smart signal processing algorithms and antenna design to increase WiFi signal strength (transmit and receive) as well as the client’s throughput in areas covered by an 11b/g A8/A8-Ei/A8i Super WiFi Base Station or 11b/g/n A2 Smart WiFi Access Point. It enables network operators to take advantage of the cost savings provided by the A8 series’ 10X greater coverage area, or the A2’s cost effective high capacity when initially installing the WiFi system. With powerful built-in antennas, the C1n WiFi CPE can be used to improve the link budget by as much as 16 dB. The C1n can be installed exactly where the signal strength requirement is the greatest. This allows an increase in the coverage distance from the A8 series base station substantially and provides greater flexibility and savings compared to the initial WiFi coverage provided by the A8 alone. From day one, the C1n is designed and purpose-built for service operators. Its built-in traffic shaping based bandwidth control mechanism allows the control of uplink and downlink traffic throughput on a per-client or per-VAP basis. WDS, VPN pass-through and a full set of networking and management features are available to meet carriers’ requirements. The C1n is a key component in wireless broadband access provisioning. It can be installed outdoors by the side of a window, mounted to a wall, at the rooftop of a building or placed at the desktop inside for fixed broadband access provisioning. The C1n can also be used as a standalone WiFi Access Point for smaller networks supporting 802.11b/g/n clients. With its high gain built-in smart antenna, it is an important solution to complement the large coverage of an A8 series Super WiFi Base Station and the high throughput of the A2 Access Point to improve WiFi performance. The Altai C1n WiFi CPE is the most cost effective and versatile way to replace traditional last mile access. When combined with the A8 series Super WiFi Base Station and A2 WiFi AP/Bridge, it can be used to build a high capacity WiFi system that achieves the fastest ROI for both telecom operators and enterprises. Feature Highlight Features built-in for carriers including per client/VAP bandwidth control, remote web-based management and client performance statistics ±45° cross-polarized patch antennas are optimized to match with the Altai A8n series antennas. It provides 3 dB more gain as compared to other V-H polarized CPEs High performance antenna with 20 dB front-toback ratio, which is on average 5 dB better than others in directional transmission without picking up unwanted signal One-piece weatherproof chassis compliant to IP55 standard for direct outdoor installation 8-level LED for easy alignment in the strongest signal direction Increase signal strength for both NLOS and LOS coverage areas Improve data transmission rate and throughput utilization of base station
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Altai Super WiFi Proposal
3.9 Altai U1 Super WiFi USB Client The Altai U1 Super WiFi USB client is designed as an essential component in the Altai Super WiFi system to extend outdoor WiFi coverage into indoor areas for broadband connectivity. The Altai U1 employs patented smart signal processing algorithms and antenna design to increase WiFi signal strength (transmit and receive) as well as the client’s throughput in areas covered by the A8/A8-Ei/A8i Super WiFi Base Stations or A2/A2e Super WiFi Access Point. It enables network operators to take advantage of the cost savings provided by the A8 series 10X greater coverage area, or the A2 series cost effective high capacity when initially installing the WiFi system. With powerful built-in antennas, the U1 WiFi client can be used to improve the link budget by as much as 15 dB. The U1 WiFi client is designed to get power from a laptop through an external USB cable. It can be equipped whenever the greatest signal strength and throughput are required. The use of U1 client allows an increase in the coverage distance from the A8/A8-Ei/A8i base station substantially and provides greater flexibility and savings compared to the initial WiFi coverage provided by A8 alone. From day one, the U1 is designed and purpose-built for service operators. The U1 is a key component in wireless broadband access provisioning. It can be placed by the window side of a household for wireless DSL provisioning. It can also be placed just next to a laptop for mobile Internet application. No matter what application it is used for, the built-in 802.11b/g/n radio ensures the highest possible throughput supported by the WiFi base station. The Altai U1 WiFi client is the most cost effective and versatile way to replace traditional last mile access. When combined with the A8/A8-Ei/A8i Super WiFi Base Station and A2/A2e WiFi AP/Bridge, it can be used to build a high capacity WiFi system that achieves the fastest ROI for both service providers and enterprises. Feature Highlight Features built-in for carriers including client performance statistics ±45° cross-polarized patch antennas are optimized to match with the Altai A8 /A8-Ei/A8i antennas. It provides 3 dB more gain as compared to other V-H polarized CPEs High performance antenna with 20 dB front-to-back ratio, which is on average 5 dB better than others in directional transmission without picking up unwanted signal The best data transmission rate and throughput available by using 802.11b/g/n radio Powered by laptop by using an USB cable Multi-level LED for easy alignment in the strongest signal direction Increase signal strength for both NLOS and LOS coverage areas
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Altai Super WiFi Proposal 3.10 Altai Wireless Management System (AWMS) The Altai Wireless Management System (AWMS) provides network operators a full suite of element and network management functions for WiFi networks. It facilities operational functions that include configuration management, fault management, performance monitoring and security function. It reduces the complexity of network provisioning, operations and maintenance through remote and centralized administration. The benefits of using AWMS include:
Centralized Management of Network Equipment AWMS provides network operators a centralized way to remotely administer and control WiFi base stations in the network, significantly reducing the workload for local configuration and monitoring. AWMS provides users a full network view so that the operator can monitor, at a glance, the whole network topology and status. This graphical view shows network layout, including inventory and configuration of each BTS in the network and all wireless facilities connecting them.
Accelerate Network Deployment AWMS allows operator’s flexibility in setting up a WiFi network. Once WiFi base stations are installed on site, auto-discovery and template-based mass provisioning will enable network operators to configure large numbers of WiFi base stations quickly and enable the entire network to be operational in a short time.
Improve Network Health and Quality AWMS collects equipment and wireless facility alarms both automatically and ondemand. It maintains the real-time status of the whole network and displays alarm information graphically and textually. The user-friendly Graphical User Interface (GUI) presents and organizes correlated alarm information clearly. An operator can act quickly to reduce outages. The colourcoded logical network map uses icons to represent each managed Network Element. It enables fast, effective fault management through its visual alarm notification, alarm processing and tracking capabilities.
Enhance Network Security AWMS allows network operators to set and continually enforce multi-layer network authentication and data encryption configurations, including SSID, ACL, WEP, 802.1x and WPA. In addition, AWMS also simplifies and improves system security. It centralizes the administration of individual user accounts and online sessions, and provides a permission scheme that assigns users to different network geographic groups and functional groups.
Reduce Network Operating Cost AWMS can help network operators to reduce operating costs by simplifying network administration and control throughout the network life cycle, in provisioning, operation and maintenance.
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Altai Super WiFi Proposal With AWMS, operators can handle today’s WiFi network equipment while leaving room for growth and incorporating the ability to respond quickly to any emerging technologies and products, thereby protecting the users’ investment. The following are key features of this software system:
Visual fault alert via network map Single/mass NE configuration Template and group based configuration Automatic NE detection and provisioning On-demand/schedule based firmware upgrade WiFi client registration and searching by user identity Real time system performance/NE traffic statistics System/NE/WiFi client performance reporting Rogue AP detection and channel scan summary Link connection and status monitoring CPE management using TR069* CPE remote diagnosis and service activation*
* will be available in future
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Altai Super WiFi Proposal 3.11 Altai Service Controller 200 The Altai service controller 200 is designed to be used in Altai Super WiFi systems as bandwidth controller, backbone router, firewall and VPN server. The Altai service controller 200 can handle 200 Mbps throughput and 100 concurrent user capacity. For more throughput or users capacity, the Altai service controller 7000 is recommended for up to 6,000 Mbps throughput or 1,000 concurrent users. With AR7240 CPU and 5 Fast Ethernet ports on industrial custom designed mother broad and Linux-based operating system, the Altai service controller 200 provides the best-in-class bandwidth control performance. It is cost effective for up to 200 tunnels, virtually unlimited number of policy rules and queues, perfectly suit for small network startup or proof-of-concept to WISP, mobile operators and various service providers. The Altai service controller is an essential network element for WISP solution, which includes applications such as city-wide wireless broadband Internet, hotzone, hotspot, wireless DSL and 3G data offload. Altai provides complete turnkey WISP solution and supplies other network components as well. This includes Altai Wireless Management System (AWMS), Altai Billing and Prepaid Card System, Altai Network Monitoring System and Altai Help Desk System. In all these applications, our solutions offer operational cost saving benefits such as quick deployment, ease of configuration and the ability to upgrade existing capacity to cater for new requirements (i.e. “pay as you grow”). Altai service controller provides the most cost effective and versatile way for backend provisioning in terms of its functionalities and throughput capacity. When combined with the A8 Super WiFi Base Station, it can create possibly the most cost-effective high capacity wireless broadband network system. Feature Highlight
Bandwidth controller – take control of your network traffic bandwidth, limit data rates for all traffic passing through Backhaul router – up to 200 Mbps traffic throughput , stackable for handling higher traffic, failover protection or load sharing Firewall – filter traffic by IP address, address range, port, port range, IP protocol, DSCP and many more VPN server – connect remote sites and users together securely using VPN through Internet with IPSec encryption
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Altai Super WiFi Proposal 3.12 Altai Service Controller 7000 The Altai service controller 7000 is designed to be used in Altai Super WiFi systems as bandwidth controller, backbone router, firewall and VPN server. The Altai service controller 7000 can handle 6,000 Mbps throughput and 1000 concurrent user capacity. More throughput or users can be supported by cascading a number of systems. Further, the multiple systems can be arranged in failover backup and load sharing configuration for redundancy protection. With Intel Core 2 Duo CPU and 10 Gigabit Ethernet ports on industrial custom designed mother broad and Linux-based operating system, the Altai service controller 7000 provides the best-in-class bandwidth control performance. It can be stacked for virtually unlimited number of tunnels, policy rules and queues, perfectly suit for WISP, mobile operators and various service providers. The Altai service controller 7000 is an essential network element for WISP solution, which includes applications such as city-wide wireless broadband Internet, hotzone, hotspot, wireless DSL and 3G data offload. Altai provides complete turnkey WISP solution and supplies other network components as well. This includes Altai Wireless Management System (AWMS), Altai Billing and Prepaid Card System, Altai Network Monitoring System and Altai Help Desk System. In all these applications, our solutions offer operational cost saving benefits such as quick deployment, ease of configuration and the ability to upgrade existing capacity to cater for new requirements (i.e. “pay as you grow”). Altai service controller 7000 provides the most cost effective and versatile way for backend provisioning in terms of its functionalities and throughput capacity. When combined with the A8 Super WiFi Base Station, it can create possibly the most cost-effective high capacity wireless broadband network system. Feature Highlight
Bandwidth controller – take control of your network traffic bandwidth, limit data rates for all traffic passing through Backhaul router – up to 6 Gbps traffic throughput , stackable for handling higher traffic, failover protection or load sharing Firewall – filter traffic by IP address, address range, port, port range, IP protocol, DSCP and many more VPN server – connect remote sites and users together securely using VPN through Internet with IPSec encryption
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Altai Super WiFi Proposal 4. Network Design 4.1 Access Coverage Architecture The A8n will be used for primary outdoor coverage. The horizontal beamwidth of each A8n sector antenna is 70-degrees and the vertical beamwidth is 12-degrees. The coverage of an A8n base station looks similar to a square shape (Figure 2), rather than a circular coverage as given by a standard omni-antenna. However, in general illustration purpose, we may still use a circular shape if detail calculation is not required. With a coverage radius of 500 m, the corresponding side of the square will be 5002 + 5002 = 700 m and the area of the square is approximately equal to 0.5 km2. Figure 2: A8n Single Base Station Coverage
700 m NLOS 500 m NLOS
700 m NLOS A8n can provide a NLOS coverage radius of 350 to 500 m across the sub-urban areas where the buildings are relatively low-raised. For urban areas with high-raised buildings, the coverage is highly dependable on the building and street structure, a 250 m NLOS coverage radius along a street (i.e. 500 m span) can be used as a rule-of-thumb . For outdoor open areas such as park, A8n can provide a near LOS radius of up to 1 km or more. The number of A8n per km2 varies with the coverage radius which depends on the environment. Figure 3 summarized the number of A8n required per km2 for various coverage radii. Figure 3: A8n Coverage Distance and Area Environment Open Area (LOS) Rural (NLOS)
Coverage Radius (r)
Coverage Area (2r2)
No. of A8n/ km2
1000 m
2 km2
0.5
500 m
0.5 km
2 2
Sub-urban (NLOS)
350 m
0.25 km
Urban (NLOS)
250 m
0.125 km2
2 4 8
In general, for an area of 1 km2 in sub-urban environment, it would require 2 to 4 A8n base stations. Proof-of-concept (PoC) field trials at representative environments can be conducted to verify the actual coverage radius at different scenarios and a budgetary plan mainly based on number of base stations can be prepared. The sector antennas of A8n base station operate at 2.4 GHz provide access coverage to the client terminals, and the A8n base station has both a wired Ethernet port and a 5 GHz
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Altai Super WiFi Proposal wireless backhaul for connection to the backend network. In the case using the physical backhaul, this requires connection to broadband Ethernet line from Internet Service Provider (ISP). To save the physical backhaul costs and in some rural area cases where the wired Internet outlet is not easily available, wireless backhauls will be used to group several A8n base stations into a cluster for larger coverage area as illustrated in Figure 4. Figure 4: A8n Cluster Structure
5 GHz backhaul
Internet
2.4 GHz access In order to save up the backhaul and site rental costs, the A8n base stations can be interconnected via the 5 GHz backhaul, the central A8n acts as a master which can connect up to 4 A8n base stations, which act as slave. If each A8n provides an average local coverage area of 0.5 km2, then a cluster can provide a total coverage of 2.5 km2. A8-Ein can be used for outdoor coverage instead of A8n in the following circumstances:
The maximum target coverage radius exceeds that of the A8n or the coverage areas are in long sector shape, e.g. along a street, airbase coverage, long range wireless DSL. Refer to Figure 5 and 6 for the maximum distances of A8n and A8-Ein. Coverage to a remote discrete area separated by highway or sea at distant away exceed that of A8n, e.g. island, offshore oil refining telemetry, coverage for tourist boats at middle of a lake Higher link budget is desired where higher received signal strength is necessary, e.g. indoor penetration, support VoIP Building new wired Internet outlet and new site is very expensive, and larger site coverage area at the same user capacity than that of A8n is desired, e.g. rural residential area with large footprint and low population density Existing 3G or other cellular sites can be used for WiFi base station co-location, where the coverage radius of WiFi base station is large as possible to match with that of 3G base station coverage
The coverage patterns of A8n versus A8-Ein can be seen below:
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Altai Super WiFi Proposal Figure 5: A8n, A8in and A8-Ein Coverage Comparison
14 dBi Max.
19 dBi Max.
4 sector antennas each 70 for total 360 coverage 1 antenna array for 80 (-3dB) to 100 (-8dB) coverage
A8n/A8in
A8-Ein
The corresponding coverage capability of A8-Ein is shown in Figure 6 below. Figure 6: A8-Ein Coverage Distance and Area Coverage Radius (r) 1700 m
A8-Ein Coverage Area (2.6r2/3) 2 km2
Site Coverage Area (2.6r2/3) 6 km2
No. of A8-Ein/ km2 0.5
800 m
0.5 km2
1.5 km2
2
Sub-urban (NLOS)
500 m
0.2 km
2
2
5
Urban (NLOS)
350 m
0.1 km2
Environment Open Area (LOS) Rural (NLOS)
0.6 km
0.3 km2
10
As a comparison, the cellular architectural patterns for a large area city-wide coverage are shown in the Figure 7 below. Since one set of A8-Ein has a horizontal beamwidth of 80 (16 dBi) to 100 (11 dBi, same as -3dBi antenna gain of A8n), three sets of A8-Ein are used at each site for omni coverage. In practice, more A8-Ein can be co-located at one site if higher throughput or user capacity is desired. If we compare the coverage area of a site, we can see that the A8-Ein can provide 3 times in open area to 2.4 times in dense-urban area as compares to A8n. A8in can be used for outdoor coverage instead of A8n in the following circumstances:
Omni coverage (the integrated antennas of A8in are fixed in orientation for omni coverage)
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Individual antenna down-tilt is not necessary (the integrated antennas have 5.5 fixed down-tilt) Installation height is around 5 to 12 m (the higher the installation, the longer the target range, but the poorer the near end coverage) Target range is from near end to maximum of 150 to 200 m Pole or wall-mounting is possible It is desirable to hide the antennas
Figure 7: Cellular Architecture Comparisons for Large Area Coverage
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The relationship between installation height and target range can be seen from Figure 8. Figure 8: A8in Installation Height against Distance Installation Height
Target Distance
Remark
10 m
125 m
Optimized coverage for near to far end
12 m
150 m
Optimized coverage for near to far end
15 m
200 m
Optimized coverage for near to far end
20 m
250 m
Optimized coverage biased to far end
30 m
400 m
Optimized coverage biased to far end
40 m
500 m
Optimized coverage biased to far end
50 m
650 m
Optimized coverage biased to far end
4.2 Backhaul Architecture The A2 will be used for point-to-point (PTP) wireless bridge which connects an A8n to a remote wired Internet outlet. The wireless bridge can be formed by either a pair of A2 (802.11a/n possible) or by an A2 and A8n’s 11a/n radio as shown in Figure 9 below. Each A2 bridge has built-in 16 dBi flat panel antenna and supports 802.11a/n standards. When it operates at 802.11a, it supports a throughput of up to 25 Mbps and when operates at 11n up to 120 Mbps. Two pairs of A2 can also be coupled together in back-to-back manner if the target distance is more than one A2 to A2 hop. Alternatively, A2e or B5 can be used for long range backhauling.
Figure 9: A2 WiFi Bridge Configuration
A2-A8n backhaul
A8n- 11a/n radio
11a/n, LOS
Internet
A2-A2 backhaul
Multiple hops for extended distance
11a/n, LOS Ethernet Switch
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Altai Super WiFi Proposal Multiple A2-A8n PTP pairs can be grouped together to form an A8n cluster as shown in Figure 10 below. In the figure below, three dedicated 802.11a/n paths are formed with total throughput of 3 x 120 Mbps available. Figure 10: Multiple A2-A8n Bridge Pairs Configuration
A2 WiFi bridges
Master A8
Slave A8
Internet
Wired Internet outlet
However, if smaller throughput is enough, the three dedicated A2s at the master site can be replaced by the 11a/n backhaul radio of A8n equipped with a 9 dBi external omni antenna, forming PTMP connection as shown in Figure 11 below. The master A8n can provide up to 160 Mbps aggregated throughput for the three slave A8n. In areas where Internet outlet is very expensive to build, several master sites can be further aggregated together using pairs of A2 to be connected to a larger wired Internet outlet. In this way, a 2-tier backhaul structure is formed.
Figure 11: PTMP A8n-A8n Bridging Configuration
A2 WiFi bridges 9 dBi Omni
Master A8n
Slave A8n Internet
Wired Internet outlet The distances between various combination of A2 and A8n, using different panel or omni antennas can be seen in Figure 12 below. The actual distances may be less than these
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Altai Super WiFi Proposal values depending on the actual environment such as LOS clearance and interference conditions. Figure 12: Maximum Distances for Various Bridging Configuration Far End Near End A2 built-in 16 dBi, 20º A2e ext. 20 dBi, 10º
A2 built-in 16 dBi, 20º
A2e ext. 20 dBi, 10º
A2e ext. 9 dBi, 360º
A8n ext. 20 dBi, 10º
A8n ext. 9 dBi, 360º
12 km
17 km
6 km
10 km
5 km
17 km
25 km
9 km
13 km
4 km
A2e ext. 9 dBi, 360º
6 km
9 km
2.5 km
4 km
1.5 km
A8n ext. 20 dBi, 10º
10 km
13 km
4 km
12 km
5 km
A8n ext. 9 dBi, 360º
5 km
4 km
1.5 km
5.0 km
1.5 km
The throughput capability of the bridge pairs will change with the distances apart. The longer the distance, the lower will be the throughput. Figure 13 below shows the distances support for various throughput requirements. These figures are for reference only, which may vary according to actual environment and conditions. Figure 13: Throughput Supported at Different A2, A2e and A8n Distances Throughput (Mbps) Distance 1 km 2 km 3 km 4 km 5 km 6 km 7 km 8 km 9 km 10 km 11 km 12 km 13 km 14 km 15 km 16 km 17 km 18 km 19 km 20 km 21 km 22 km 23 km 24 km 25 km
A2 16dBi to A2 16dBi 120 108 72 54 36 36 9 9 9 5 5 2.5 -
A2 16dBi to A8n 20dBi 120 108 54 36 36 9 9 5 4 2.5 -
A2e 20dBi to A2e 20dBi 120 120 108 108 72 72 54 54 54 36 36 36 18 9 9 9 9 9 5 5 5 5 4 4 2.5
A2e 20dBi to A8n 20dBi 120 120 108 54 54 36 36 9 9 5 5 4 2.5 -
A2e 9dBi to A2 16dBi 108 54 18 9 5 2.5 -
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If longer distance than the above is required, we can use B5, the maximum ranges are shown in Figure 14 and 15 below. More detailed relationship between throughput and distance can be given on request. Figure 14: Distances supported by B5 and B5L
Distance 1 km 2 km 3 km 4 km 5 km 6 km 7 km 8 km 9 km 10 km 11 km 12 km 13 km 14 km 15 km 16 km 17 km 18 km
B5L 23dBi to B5L 23 dBi
B5 23dBi to B5 23dBi
B5 28dBi to B5 28dBi
20 MHz
40 MHz
20 MHz
40 MHz
20 MHz
40 MHz
50 50 50 39 26 13 13 -
50 50 50 50 50 50 -
104 104 104 78 39 39 26 13 13 13 -
240 240 150 120 80 60 30 30 -
104 104 104 104 104 78 78 52 39 39 39 26 26 26 13 13 13 13
240 240 240 240 150 150 120 80 80 60 60 60 30 30 30 -
Figure 15: Distances supported by B5 34 dBi dish Antenna
Distance
B5L 34dBi to B5L 34 dBi 20 MHz
40 MHz
2 km
104
240
4 km 6 km 8 km 10 km 12 km 14 km 16 km 18 km 20 km 22 km 24 km 26 km
104 104 104 104 78 78 52 39 39 39 26 26
240 240 240 150 150 120 80 80 60 60 30 30
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Altai Super WiFi Proposal 28 km 30 km 32 km 34 km 35 km
13 13 13 13 13
30 -
4.3 Coverage, Throughput and Capacity Enhancement In between A8n there may exist some blind spot areas that cannot receive any signal from A8n. It is more cost effective to use smaller A2 WiFi access point to cover these blind spots. In NLOS environment, where A8n cannot be seen from the blind spot area, the A2 can be set at Repeater mode as shown in Figure 16 below. In this case, it receives signal from A8n, boosts it up and repeats it to nearby areas. The signal strength can be boosted up by 4 to 12 dB depends on which device and antenna is used. Figure 16: Coverage and Capacity Enhancement in NLOS Environments
11b/g/n, NLOS
A8n
The user capacity can be increased at the same time because each A2 can support extra 256 concurrent users. Please note that the total throughput drawn from A8n will be increased because the signal strength can be increased allowing them to transmit at higher data rate. However, the total access throughput from A8 will still be limited by the wireless interface of A8n up to 160 Mbps.
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Altai Super WiFi Proposal When LOS conditions can be provided, the A2 can be set at AP mode, as shown in Figure 17. This allows direct wireless backhaul connection to A8n’s 11a/n radio, and provides additional throughput of up to 120 Mbps. Access throughput will be provided by using independent 11b/g/n radio and thus a higher throughput and user capacity can be attained. Figure 17: Coverage and Capacity Enhancement in LOS Environments
L /n, 11a OS
The coverage, throughput and capacity of A8n, A2 and C1n are shown in Figure 18. Appropriate equipment can be chosen according to the requirements. Figure 18: Coverage, Throughput and Capacity Comparison for A8n, A2 and C1n
A8n, A8in
LOS Coverage Radius 1,000 m (360°)
NLOS Coverage Radius (Rural) 500 m
Max. Users 256
Typical Users 100
Maximum Access Throughput 160 Mbps
A8-Ein
1,700 m (80°)
800 m
256
100
160 Mbps
16
#
16
Product
SSID 16
A2
450 m (360°)
250 m
256
80
120 Mbps
A2e
800 m (37°)
450 m
256
80
120 Mbps#
16
C1n
600 m (70°)
300 m
64
20
120 Mbps
8
* Either uplink or downlink is limited to 100 Mbps. Future release will support up to 160 Mbps.
4.4 Indoor Coverage There are two methods of indoor coverage. The first is outdoor to indoor wireless method, the outdoor is covered by A8n and the signals are extended to indoor using the Altai C1n Super WiFi CPE or Altai U1 USB Client. There are a few arrangements possible as shown in Figure 19 below. The C1n Super WiFi CPE will receive signal from A8n and convert to standard Ethernet outlet for desktop/laptop connection. This is the standard wireless DSL application. Fixed broadband service is offered to home users using wireless local loop method. When indoor wireless coverage is required, another C1n can be connected in back-to-back manner and the second
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Altai Super WiFi Proposal C1n is best to set at different frequency channel to minimize the interference to the A8n. The C1n CPE is outdoor weather proof and therefore can be installed at the rooftop and can be shared for a few users inside the building. Independent billing is possible with the WDS function enabled. Alternatively, an Altai U1 USB client can be used if it can be connected to the client device via an USB cable e.g. a laptop.
Figure 19: Outdoor to Indoor Coverage Using C1n CPE
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C1n/U1 CPE
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Outdoor to indoor coverage method is recommended to use as the first priority whenever possible. This is more cost effective and time saving especially for large area low user density situation, where laying fibers are cost prohibitive. The coverage distances of A8n/A8-Ein/A8in can be extended substantially with the use of C1n or U1 CPE. Figure 20 below shows the estimated distances. Figure 20: A8n, A8-Ein and A8in Coverage Radius with C1n and U1 A8n/A8in to C1n Distance 2.7 km
A8-Ein to C1n Distance 4.0 km
A8n/A8in to U1 Distance 2.5 km
A8-Ein to U1 Distance 3.7 km
Rural (NLOS)
1.3 km
1.8 km
1.2 km
1.6 km
Sub-urban (NLOS)
800 m
1.2 km
800 m
1 km
Urban (NLOS)
600 m
800 m
500 m
700 m
Environment Open Area (LOS)
The second method of indoor coverage is wired method as shown in Figure 21 below. This method is complement to the outdoor to indoor method. When discrete buildings are not covered by A8 or when wired Internet outlet is already available, or when the interior areas are large enough, then indoor wired method can be used. Both the A2 and C1n can be used as indoor AP. The A2 is for standard omni or sector coverage. The C1n is for directional coverage, but if omni coverage is required, a few sets of C1n can be used. A8n can be used for indoor coverage if there is a huge hollow area inside a building, such as shopping mall or hotel.
Figure 21: Indoor Coverage Using APs
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4.5 Service Controller Depending on the business model of a WiFi network, but for a commercial city-wide network operated by a Wireless Internet Service Provider (WISP), they most probably would like to limit the bandwidth per user to avoid one particular user to dominate most of the available bandwidth. The service controller offered by Altai will not only provide feature of QoS/ bandwidth control, but also user authentication and billing support. The controller has a built-in captive portal (HTML-based login page) user database for user authentication. It can also redirect the users to various third party portals, AAA server or DHCP server as well, depending on which base station and SSID the user associated to. Users can login via captive portal or MAC address authentication. Different authentication methods can be assigned to different SSID/VLAN. Session records including the usage time and traffic volume are maintained in the service controller for accounting/billing purpose. Per user RADIUS attributes for billing support include maximum time a session can be active for session timeout, maximum session idle time, session time, number of octets/bytes sent/received or number of packets sent/received. The session records can be exported to the billing server for further processing. Bandwidth can be assigned on user, SSID or VLAN basis. The traffic can be differentiated based on VLAN, MAC address, user name and password etc. The QoS/bandwidth management policy can be implemented by controlling the bandwidth of a user session, the transmit/receive data rate or upload/download limit for a user session. There are 2 models for the controller, namely Service Controller 200 and 7000, controls up to 100 and 1000 clients respectively. The service controller is to be connected behind the base station and in front of the firewall. Figure 22: Service Controller 200 (Left) and 7000 (Right)
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Altai Super WiFi Proposal As each service controller will only serve up to 1,000 concurrent wireless clients. When the user space is growing it is recommended to expand the network by installing more service controllers in a regional network. If the network is ever growing, it is recommended to expand the network by installing more regional networks. To manage multiple-regional network, a centralized AWMS CCS server will be placed at backend layer, which manage the whole network through multiple AWMS Proxy servers located inside each regional network. Each regional network requires one AWMS proxy server, which can manager up to 200 network elements. Up to 20 proxy servers can be managed by one AWMS CCS server, which can support up to 500 network elements for the whole network, and can be expandable to 2,000 network elements in future release. All service controllers, APs and AWMS CCS server and AWMS proxy servers are under management VLAN. The connection diagram for both a single service controller system and multiple service controllers system is shown below. Figure 23: Single and Multiple Service Controllers Connection Diagram Core Network Internet
RADIUS server AWMS CCS server
Regional Network (Single SC)
Service Controller (SC)
Regional Network (Multi-SC)
Service Controller
Regional Network
Service Controller
Management VLAN
AWMS proxy server
AWMS proxy server
AWMS proxy server
Backhaul
A2
Access
A8n/A8-Ein/A8in
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Altai Super WiFi Proposal 5. Proposed Solution 5.1 Introduction In a city-wide network, there are in general five types of cost element:
Equipment Cost (Hardware and maintenance) Engineering Cost (Site planning, site survey, equipment installation and site construction) Site Cost (Site acquisition, rental and electricity) Backhaul Cost (Internet backbone setup and rental) Operation Cost (Network management systems, customer and organizational supports)
This section is to estimate the quantity of access and backhaul equipment required building up a city-wide WiFi network in the areas as requested by the customer, and at the same time to give indication on the network capacity it can support and the number of wired Internet outlets required so that the quantity for the other costs elements can be estimated. This proposal will only present the technical information, the quotation for the Altai product will be submitted separately. While Altai as a vendor will only provide the WiFi equipment, network management software and service controller, our channel partners/ system integrators will provide all the other elements and supporting services. This section is written based on the following assumptions:
The areas to be covered can be roughly divided into 2 types of environment, namely suburban area and urban area, with each type of environment contains uniform distribution of buildings and road structure as defined hereafter. Users are uniformly distributed in the target coverage areas. The environment is almost free from radio interference. In much interference environment, both data throughput and coverage distance will be lowered than expected. Line-of-Sight (LOS) environment is available between wireless backhaul equipment. The coverage requirements are mainly for outdoor areas. Indoor coverage be can extended from outdoor by using Altai C1n CPE or Altai U1 USB Client, the quantity of which varies a lot depending on building structure and therefore it can only be estimated by the customer itself. The application of the city-wide WiFi network is mainly for data uses, including Web browsing, e-mail, video streaming, Internet gaming, PDA, game console etc. The network can support more applications such as video surveillance and VoIP etc., but the capacity calculations have to be changed. Service controllers are installed to limit the maximum throughput for each user. The users are nomadic in nature. If the services are mainly for residential or commercial wireless DSL uses, the calculations have to be changed.
5.2 Coverage Environment Since the exact area to be covered is unknown, it is assumed that the environment and area of interest is similar to Figure 24 below. According to the map, we can separate the environment into 2 categories, namely suburban area and urban area.
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Altai Super WiFi Proposal Figure 24: Map of the city
(1)
Suburban area – it is a residential area. Buildings are mainly made of wood with average heights of 1 or 2 floors (~8 m). The width of road/ street is approximately 20 m. Typical views of rural area are shown in Figure 25. Figure 25: Typical Suburban Environment
(2)
Urban area – it is a commercial area. The building heights range from 5 floors to over 30 floors. Buildings are made of concrete materials with large building blocks. The width of the roads or streets is narrow. Radio signal have more difficulty propagating and penetrating across the roads. Typical views of urban area are shown in Figure 26.
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Altai Super WiFi Proposal Figure 26: Typical Urban Environment
5.3 Coverage Area and Quantity Required In this section, we are going to estimate the number of A8n Super WiFi Base Station required for providing WiFi coverage in that area. The area to be covered is shown in Figure 24. (1)
Area to be covered is 2 x 2 km = 4 km2
Since the details about the environment and site situation in the city are not available, we assumed: (2)
Percentage of suburban area = 90%
(3)
Percentage of urban area = 10%
Then the sizes of the areas are: (4)
Area of suburban area = 4 km2 x 90% = 3.6 km2
(5)
Area of urban area = 4 km2 x 10% = 0.4 km2
Refer to Figure 3, the cell radius of A8n base station is about 350 m in suburban area to provide reasonable coverage for data applications such as email, Web browsing. On the other hand, in urban area, close buildings creates larger path loss and hence cell radius in such area is assumed to be 250 m. In suburban area, we assumed cell radius of A8n to be 0.35 km, therefore, (6)
Coverage per A8n in suburban area = 0.25 km2
In urban area, we assumed cell radius of A8n to be 0.25 km, therefore, (7)
Coverage per A8n in urban area = 0.125 km2
Since the NLOS coverage distance of A8n will vary greatly depending on the actual NLOS conditions. Therefore, the value can be changed according to the actual field test results to be done by your system integrator. This quantity of equipment will be revised accordingly. From the results of (6) and (7): (8)
Expected number of A8n for suburban area = Area of suburban area / Coverage per A8n in suburban area
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Altai Super WiFi Proposal = 3.6 km2 / 0.25 km2 = 14 sets (9)
(round-up)
Expected number of A8n for urban area = Area of urban area / Coverage per A8n in urban area = 0.4 km2 / 0.125 km2 = 3 sets (round-up)
Consequently, (10) Total number of A8n = 14 sets + 3 sets = 17 sets
(round-up)
(11) Total number of RF cable = Number of RF cable per A8n x Total number of A8n = 8 pcs x 17 sets = 136 pcs In practice, it may not be easy to acquire the exact and desired location according to the plan and that it requires certain overlapping between 2 adjacent base stations, the network operator may need to acquire and install more sites to provide coverage than planned. Therefore the network operator is advised to add a certain percentage of margins on top of the above A8n quantity.
5.4 Backhaul Throughput In this section, we are going to estimate the throughput requirement under each A8n in the interested area. It is assumed that most of the users are running data applications such as web browsing and email. It requires data throughput of 1 Mbps per user. (1)
Throughput per user = 1 Mbps
The number of concurrent users under each A8n will be different. In general, there will be lesser users in suburban areas and more users in urban areas. We assume (2)
No. of concurrent users per A8n in suburban areas = 100 concurrent users
(3)
No. of concurrent users per A8n in urban areas = 200 concurrent users
When a user is using applications, he/she does not occupy all the time to download/upload data. The data transfer pattern should like a loop of this behavior: data is downloaded and then he/she spends some time to utilities or read the content. Hence, it is assumed the user will perform data transfer (i.e. download/upload) during 5% of the time, and he/she will be idle for the rest. When a group of users are sharing an Internet line, since not all of them will perform data transfer at exactly the same time, the line can be shared by a number of users as if each one is using the line by his/her own without apparent degrade in bandwidth. The number of users that can share in this way is called the Share Ratio. For example, a share ratio of 25 means that an Internet line with 2 Mbps throughput can be shared by 25 concurrent users each of whom still feels to have 2 Mbps throughput during a period of time. The share ratio can vary from 10 to 30 for normal Internet browsing application. The higher the traffic required, the lower the share ratio. A share ratio of 25 can be used for general citywide WiFi application. For users that require higher traffic, such as those in universities or offices, a share ratio of 15 to 20 can be used. On the other hand, for real time application such as video surveillance and VoIP application, since the video signal or voice content are real time continuous signals, the share ratio will be 1.
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In this project, we assume (4)
Share ratio = 25
Therefore, (5)
Backhaul throughput per A8n in suburban areas = No. of concurrent users per A8n x Throughput per user / Share ratio = 100 concurrent users x 1 Mbps / 25 = 4 Mbps
(6)
Backhaul throughput per A8n in urban areas = No. of concurrent users per A8n x Throughput per user / Share ratio = 200 concurrent users x 1 Mbps / 25 = 8 Mbps
5.5 Internet Outlet Since not all the sites are equipped with wired Internet outlet, in order to save the cost in laying wired Internet line to each site, we use wireless backhaul links to group a number of A8n sites into a cluster before connecting to a wired Internet outlet. Referring to Figure 27, a 5 GHz wireless backhaul link can be formed by connecting one A2 WiFi bridge to the A8n’s 802.11a/n backhaul radio. The site that has connection to the wired Internet outlet is called “master site”, while the other sites that wirelessly connected to the master site are called “slave site”. The master and slave sites that are grouped together to share one wired Internet outlet is called “cluster”. Figure 27: A8n Cluster Structure for Urban Coverage
A2 WiFi bridges
Master A8n
Slave A8n
Internet
Wired Internet outlet When we group together a number of sites into a cluster, we need to check if the bandwidth of the aggregated wired Internet outlet is available. For example, if we group 3 slave sites into a master site (totally 4 sites in one cluster), and if each site requires 8 Mbps throughput, then the aggregated wired Internet outlet throughput will require 32 Mbps. We need to check if 32 Mbps Internet line or above is available from local ISP. In this proposal, we assume 32 Mbps Internet outlet is available, then,
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Altai Super WiFi Proposal (1)
Throughput of Internet outlet in suburban areas = Backhaul throughput of A8n in suburban areas x Number of A8n per cluster = 4 Mbps x 4 sets = 16 Mbps
(2)
Throughput of Internet outlet in urban areas = Backhaul throughput of A8n in urban areas x Number of A8n per cluster = 8 Mbps x 4 sets = 32 Mbps
From Figure 13, we can check out that: (3)
Maximum distance of A8n-A2 backhaul in suburban area with 4 Mbps throughput = 9 km
(4)
Maximum distance of A8n-A2 backhaul in urban area with 8 Mbps throughput = 7 km
Longer range can be supported if A2e is used. In this case 12 km and 9 km can be supported for suburban and urban areas respectively. If for even longer distance, a pair of A2 or A2e can be used. In this case, the distances can be supported up to 24 and 18 km respectively if a pair of A2e is used. That means the slave sites need not to be nearby the master site, we can group together slave sites at some distance away by using appropriate pair of wireless bridges such as A2, A2e, B5L or B5. When a number of slave sites are to be grouped into a master site, the A2 bridges at the master sites will be installed as far away as possible in order that the interference between the A2s can be minimized. In practice, different A2s will be installed at different corners of a building rooftop for maximum separation. If even more A2s are required, several A2s may be required to be installed at one mounting pole. In this case, we reserve a minimum vertical separation of 3 m in our design. The number of A8n in a cluster will vary depending on the geometry of the coverage areas, in this proposal, we assume on average 4 A8n per cluster for both suburban areas and urban areas, i.e. the same as that shown in Figure 27. The number of clusters can be calculated as follows: (5)
Number of cluster in suburban areas = Number of A8n in suburban area / 4 = 14 sets / 4 = 4 clusters (round up)
(6)
Number of cluster in urban areas = Number of A8n in urban area / 4 = 3 sets / 4 = 1 cluster
(round up)
5.6 Backhaul Equipment Each cluster will consist of 1 master site and 3 slave sites. In each master site, 1 A8n base station and 3 A2 WiFi bridge are to be installed, and all will be connected together to wired Internet outlet via an Ethernet switch. In each slave site, the A8n built-in backhaul radio with an external 20 dBi dual-polarized panel antenna to be connected by 2 RF cables will be equipped. So, there will be 4 A8n and 3 A2 per cluster. In the other words, (1)
The ratio of A2 to A8n = 3/4
(2)
Number of A2 in suburban areas = Number of A8n in suburban area x 3/4
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Altai Super WiFi Proposal = 14 sets x 3/4 = 11 sets
(round up)
Number of external 5 GHz 20 dBi panel antenna at A8n = 11 sets Number of RF cable = 22 pieces (3)
Number of A2 in urban areas = Number of A8n in urban area x 3/4 = 3 x 3/4 = 2 sets (round up) Number of external 5 GHz 20 dBi panel antenna at A8n = 2 sets Number of RF cable = 4 pieces
(4)
Total Number of A2 = 11 + 2 = 13 sets Total number of external 5 GHz 20 dBi panel antenna = 11 + 2 = 13 sets Total number of RF cable = 22 + 4 = 26 pieces
5.7 Concurrent User Capacity In this section, we are going to estimate the number of concurrent users supported by the whole WiFi network in the interested area. The concurrent user capacity is the total number of users that are using the network at the same time. We assume that the users are evenly distributed over the whole network and are not congested to a certain district. Further, the throughput of each user will be controlled by Service controller to an upper limit of the service plan he/she subscribed such that no one user will eat up all the bandwidth under an A8n. In this proposal, (1)
Total number of concurrent users = Backhaul throughput per A8n x No. of A8n x Share ratio / Throughput per user = 4 Mbps x 14 x 25 / 1 Mbps in suburban + 8 Mbps x 3 x 25 / 1 Mbps in urban = 1,400 + 600 = 2,000 concurrent users
5.8 CPE Equipment There are two types of CPE, namely Altai C1n Super WiFi CPE and Altai U1 USB Client, that can be used to extend the coverage and to boost up the throughput under the A8n. The C1n is used mainly for fixed locations such as residential household and hotspot where the locations are far from an A8n. The U1 is used mainly for nomadic users carrying a laptop. In this proposal, we assume the outermost 25% of concurrent users from A8n require C1n for signal improvement, and that 10% of concurrent users require U1,
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Total number of C1n = 1,400 x 25% (suburban) + 600 x 25% (urban) = 350 + 150 = 500 sets
(2)
Total number of U1 = 1,400 x 10% (suburban) + 600 x 10% (urban) = 140 + 60 = 200 sets
5.9 Subscriber Capacity Not all the subscribers who registered the service will turn on their notebook/computer/PDA and login to the network at the same time, on the same day and under the same base station. A concentration ratio can be used to oversell the network capacity. This oversell ratio varies with the nature of application, the type of users and the network size. The ratio will be higher for short-duration applications such as voice and lower for long-duration applications such as file transfer. It will be higher for city-wide WiFi application because the average duration they use will be shorter and lower for residential broadband application because the average time they stay in use will be longer. It will be higher for large scale network from statistical point of view and lower for startup network with just several base stations. The oversell ratio can range from 1 to 4 times in common practice. Oversell ratio of 1 means all users subscribed will be using the network at the same time. For those residential users that have C1n installed, we may use oversell ratio of 1 because they shall always switch on a C1n no matter they are using it or not. In that case, even if a C1n has no traffic, it will associate an A8n and will be counted as 1 out of the total 256 users. In this proposal, we assume (1)
Oversell ratio for C1n user = 1
(2)
Oversell ratio for other users = 4
(3)
Total number of subscriber = Total number of concurrent users x Oversell ratio = 350 x 1 + (1,400 – 350) x 4 (suburban) + 150 x 1 + (600 – 150) x 4 (urban) = 4,550 + 1,950 = 6,500 subscribers
5.10 Service Controller From Figure 23, we can see that the Service Controller must be put behind A8 and before Internet outlet; this means each cluster requires Service Controller of appropriate size according to the number of simultaneous users the cluster supports. (1)
Number of concurrent users in a cluster in suburban areas = Number of concurrent users per A8n x Number of A8n per cluster = 100 x 4 = 400 concurrent users
(2)
Number of concurrent users in a cluster in urban areas = Number of concurrent users per A8n x Number of A8n per cluster = 200 x 4 = 800 concurrent users
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Altai Super WiFi Proposal From section 4.5, we can see that Service Controller 200 can only support up to 100 concurrent users, and Service Controller 7000 can support up to 1,000 concurrent users, therefore the appropriate model is Service Controller 7000 for both areas. (3) (4) (5)
5.11
Number of Service Controller in suburban areas = Number of cluster = 4 sets of Service Controller 7000
(round up)
Number of Service Controller in urban areas = Number of cluster = 1 set of Service Controller 7000
(round up)
Total number of Service Controller = 4 + 1 = 5 sets of Service Controller 7000
Summary of Equipment Required
The following is a summary on network design and equipment required for this proposal, with detail description on each item. Figure 28: Summary on WiFi Network Design Requirements/Design
Suburban Area 2
Urban Area
Total 4 km2
Area
3.6 km
Range of A8n
350 m
250 m
-
No. of A8n
14
3
17
No. of RF Cable for A8n Access
112
24
136
Throughput per User
1 Mbps
1 Mbps
-
No. of User per A8n
100
200
-
Share Ratio
25
25
-
Backhaul Throughput for A8n
4 Mbps
8 Mbps
-
Outlet Throughput
16 Mbps
32 Mbps
-
No. of Outlet
4
1
5
No. of A2
11
2
13
No. of A8n Backhaul Antenna
11
2
13
No. of RF Cable for A8n Backhaul
22
4
26
1,400
600
2,000
No. of C1n
350
150
500
No. of U1
140
60
200
Oversell Ratio for C1n User
1
1
-
Oversell Ratio for non-C1n User
4
4
-
4,550
1,950
6,500
4
1
5
No. of Concurrent Users
No. of Subscribers No. of Controller
0.4 km
2
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Figure 29: Summary of Altai Hardware Equipment
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5.12
Summary of Project Requirement
Equipment cost is one of the 5 cost elements in a city-wide WiFi project, the following give a check list on most of the costs involved. Costs are classified into one-time cost (CAPEX) and recurring cost (OPEX). The recurring costs are indicated in number of period in the table. We assumed the investment takes 2 years and the corresponding quantity of each item is shown below:
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Figure 30: Summary of Project Requirement
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Altai Super WiFi Proposal 6. Feature Description and User Benefit 6.1 Super Long Range and Large Coverage With the use of Multiple Radios and patented Smart Antenna Technology in Altai A8n WiFi base station, extra antenna array gain, diversity gain and special gain from signal processing technique can be attained, thus pushing up link budget in both uplink and downlink for long range coverage. Yet, the transmit power is small (5 to 24 dBm) to match with the low powered terminals such as PDA and smart phone and tablet in the uplink, the symmetrical up and downlink design is essential for good voice quality in VoIP application.
The user benefit:
The A8n provides 3X the range, up to 500 m NLOS in rural areas and up to 1 km LOS in open areas The A8-Ein provides 5X the range, up to 800 m NLOS and 1.7 km LOS 10X the area coverage, 2 to 4 BTS/ km2 Minimum installation sites, 1/6 of traditional AP
6.2 High Throughput at Range While all 802.11b/g/n WiFi radios follow the same trend of higher data rate at closer distance and lower data rate at longer distance, due to Altai A8n long range capability, the data rate and correspondingly the throughput capacity of A8n as measured at the same distance from the radio is much higher than standard 11n AP. The higher throughput capability allows Altai WiFi system to support a larger number of multi-media clients. The direct access coverage capability to user implies Negligible Link Latency makes real time traffic possible. The endto-end QoS and WMM features ensure good voice quality at priority to high volume of data traffic such as ftp or video streaming. The 8x8:2 MIMIO Multi-path Signal Sampling technique can choose the best signal paths from and to the 2 best out of the 8 directions available, thus increasing the successful rate and reducing the number of retry; resulted in great improvement in effective throughput capacity, especially in complex NLOS environments.
The user benefit:
10 to 20X the data rate over standard 11b/g AP 2 to 4X the data rate at over standard 11n AP
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Altai Super WiFi Proposal 6.3 High User Capacity Another very important benefit of using multiple antennas with independent, coordinated radios is to minimize the harmful effects due to packet collisions from hidden nodes, as explained in figure below. Packet collisions from hidden nodes happen very often in NLOS environments. For instance, when two hidden clients send signals to an A8 at the same time but from different directions, the A8n can receive both signals using multiple antennas and radios, and therefore both signals can be processed without collision. In this way, the lost packets and transmission retries are substantially minimized, meaning more time slots are reserved for other clients or additional packets. This is a key reason why the A8n can handle two to four times the user capacity of a standard AP, or even of multiple standard AP’s collocated but not operating in a coordinated manner at the baseband and physical RF layer. Each A8n typically supports 100 concurrent users and up to a maximum of 256 users .
The user benefit:
4 X the user capacity Typically 100 concurrent users Maximum 256 users Up to 300 Mbps data rate in both 2.4 and 5 GHz bands Up to 160 Mbps throughput
6.4 Superior Interference Mitigation There are two factors that lead the A8n/A8-Ein to provide much better interference mitigation as compared to a single antenna standard AP. Firstly, the A8n platform has been designed from the beginning to be located outdoor among other high power radio systems, such as GSM, 3G, PHS etc. It has multiple high quality RF filters on each receive (Rx) & Tx path. It has been extensively tested and proven to work efficiently in high interference and denseurban areas, with different kinds of cellular systems operating nearby, even within a few meters. The A8n has been collocated with PHS systems, 3G, GSM and CDMA systems without having any degradation in performance. Also, the A8n is designed to ensure it does not create any harmful interference to those systems even when collocated on the same tower or rooftop. Secondly, due to the multi-antenna and multi-radio coordinated architecture, even when one coverage sector may suffer from interference the other sectors will continue to operate normally. With a standard AP using a single antenna, any interference received to that AP will affect its entire coverage area.
The user benefit:
High network throughput and stability in much interference urban areas Designed to meet 3G base station co-location for 3G data offload Save time in radio planning More choices of site and reduction in site
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Altai Super WiFi Proposal 6.5 Better Network Throughput Optimization The Altai AirFi™ technology is the latest advanced software control algorithm for network throughput optimization, whilst some classical AP bandwidth controllers control traffic at the Ethernet port, which cannot solve the low throughput issues caused by slow clients and continuously RF layer retries. The Altai AirFi uses a traffic shaping technique superior to other classical methods. Peak traffic that exceeds a pre-set throughput limit will be transmitted during later low traffic period – there will be no packet loss, re-try or time-out as experienced with a classical method. When AirFi is enabled, 3 times the client throughput and 2 times the average system throughput can be achieved. The improvement is most obvious where network degradation is due to low speed clients dragging down the overall system capacity.
The user benefit:
3X the peak client throughput 2X the average system throughput
6.6 Better Near-to-Far End Coverage The use of multiple co-ordinate antennas in an array allows the A8n/A8-Ein system to have a much larger vertical beamwidth compared to a standard AP using a similar gain antenna as the A8n/A8-Ein. This is particularly the case with the A8-Ein. The larger vertical beamwidth allows the A8n/A8-Ein system to provide substantially more uniform coverage of the entire targeted cell area. This means the signal strength will not drop off as significantly when the vertical angle to the base station is large, as will happen with a standard AP. This allows higher data rates (stronger signal) between the user and the A8n and again improves the system capacity as compared to a standard AP.
The user benefit:
4X wider the vertical angle Substantial more uniform coverage area
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Altai Super WiFi Proposal 6.7 Flexible Deployment Each of the A8n antennas can be adjusted independently in different antenna orientations, down-tilt angles and antenna separation. That means each A8n can be deployed for different cell shapes and adopted for different site conditions.
The user benefit:
Much simpler site planning Fast deployment in days or hours Any horizontal beamwidth coverage Improved throughput density by converged coverage Rooftop, pole, ceiling, wall mounting or special tube antenna for lamppost
6.8 Highly Cost Effective With much lower quantity of base station per area, Altai WiFi solution can save your costs not only in hardware, but also in site rental, backhaul rental, site built-up, installation, maintenance and operation, resulting saving in total cost of ownership of as high as 65%!
The user benefit:
65% saving in CAPEX and OPEX 85% reduction in number of sites Fast deployment is another form of cost saving
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6.9 Better Link Performance While traditional AP will boost up the transmit power in order to give higher downlink performance, the uplink side especially for most low-powered devices is relatively poor. Altai A8n employs low transmit power and high antenna gain design to give Symmetrical Uplink and Downlink performance, with much better uplink link budget (9 dB increase). This implies a much better receive capability for low-powered and uplink-required devices such as SIP phones, PDAs and game consoles. Further, Altai A8n uses Multi-path Signal Sampling technique which has the capability to choose the best signal from multiple signals received, provides superior reception power especially in complex NLOS environments.
The user benefit:
Take care of low-powered terminals 8X the receive capability Higher number of user association Better throughput in both directions
6.10 Highly Resilient The Backhaul Protection Switching feature makes Altai WiFi system the best choice for mission critical network such as those for container port and medical care. The Link Integrity mechanism will check for complete link integrity. In case a link is failed, the A8 will switch automatically to another backhaul link; and switch back when recovered; when all backhaul links failed, the system will force the users to associate to another healthy A8n covering the same area. This protection mechanism not only improves the resilience of the radio equipment, but also to the total network, the instability caused by Internet line and application server jam.
The user benefit:
Complete backhaul protection Mission critical proof Improve network stability Saves downtime cost
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Altai Super WiFi Proposal 7.
Product Specifications
7.1 Altai A8n Super WiFi Base Station
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Altai Super WiFi Proposal 7.2 Altai A8-Ein Super WiFi Base Station
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7.3 Altai A8in Super WiFi Base Station
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Altai Super WiFi Proposal 7.4 Altai A2 WiFi Access Point/Bridge
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Altai Super WiFi Proposal 7.5 Altai A2e WiFi Access Point/Bridge
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7.6 Altai B5 Wireless Bridge
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7.7 Altai C1n Super WiFi CPE/AP 59
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7.8 Altai U1 Super WiFi USB Client 60
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7.9 Altai Wireless Management System 61
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Altai Super WiFi Proposal 7.10 Service Controller 200
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Altai Super WiFi Proposal 7.11 Service Controller 7000
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