Mobile WiMAX 802.16e The Progress and the Promise Dick Lee VP Caribbean - General Manager North America Airspan Networks Inc. The standard of 802.16 d or e was a simple naming approach but as many of you know, it was changed. And generating its own confusion. Much of my information on these slides comes from the WiMAX Forum. I will be adding my perspective along the way.

Terms IEEE 802.16 IEEE 802.16 (2004) IEEE 802.16 (2005) An emerging suite of standards for Broadband Wireless Access (BWA) IEEE 802.16 (2004) Air Interface Standard for Fixed and Nomadic Access IEEE 802.16 (2005) Amendment to 802.16 (2004) High Throughput packet data radio network Supports several classes of IP Applications and services based on different usage, mobility and deployment models Support for customer stations moving at vehicular speeds Air Interface offers high degree of flexibility and options Base Station and Sector Handover functions are standardized The WiMAX forum is committed to providing optimized solutions for Fixed, Nomadic, Portable and Mobile broadband wireless access… and two versions of WiMAX have been ratified to address the demands for these different types of access. 802.16 2004 covers fixed and nomadic access in LOS and NLOS environments based upon Orthogonal Frequency Division Multiplexing as the modulation technique… (OFDM). 802.16 2005 covers fixed, nomadic, portable and mobile access, but is optimized for dynamic radio channels. It is an amendment of 802.16 2004 to include support for handoffs and roaming. The modulation technique used is Scalable Orthogonal Frequency Division Multiplexing Access. (SOFDMA) This is a multi-carrier technique that uses sub-Channelization. Operators may start with a fixed WiMAX solution and migrate as the market dictates from the fixed to mobile using various strategies such as overlay networks, dual mode customer devices and base station devices with software upgrades where no hardware change is necessary. It should be noted that the air interface for 2004 and 2005 are not compatible and therefore the requirement for the dual mode customer premise units.

WiMAX Access Options Access Type Customer Devices Locations/Motion Handoff Supported 802.16 (2004) 802.16 (2005) Fixed Outdoor Indoor CPE One - Stationary NO YES Nomadic Indoor CPE,USB, PCMICA Multiple - Stationary Portable Laptop USB, PCMCIA, Mini Cards, On Board Multiple – Pedestrian Speed Hard Handoffs Slow Mobility Laptop, USB, PCMCIA, PDA, smart phones Multiple – Golf Cart Speed Full Mobility AS Above Multiple – Highway Speed Cell Network grade Handoffs This slide shows the WIMAX Access options which will be available as we progress over the next couple of years. Next year’s CANTO conference will be showcasing some of the 802.16 2005 portable and mobile devices… and by that time there will be many fixed WiMAX networks operating in the world and possibly, some initial Mobile WIMAX networks as well. Consumers will be given the choice of solutions such as EVDO, as well as fixed and mobile WiMAX and WiFi combinations --- I also believe the 3G type solutions and the WiMAX solutions will co-exist and be complimentary to each other. The WiMAX advantage is the range of Spectrum which can be utilized and the large Channel Width of 20 MHz. Mobile WiMAX, though will gain a bandwidth advantage as time moves on…due to advances like Scalable OFDMA, smart antennas etc --- Delivering 30Mb per second to a mobile device with soft handoff is doable in a WiMAX roll out. The applications which the consumer would find compelling requiring this amount of data have not yet emerged --- but Digital TV channelisation delivered to vehicles along highway routes, trains, buses etc may emerge as a killer app. for this type bandwidth. Of course full motion digital video delivered from the network rather than the on board DVD player would also enable full voice and data capabilities to the same user from one network provider. . In my opinion, spectrum diversity and Scalable Channel Widths up to 20 MHz put the WiMAX architecture ahead of the game to deliver high bandwidth mobile services as future applications roll out. Source WiMAX Forum

Mobile WiMAX – 802.16e Ratified by IEEE late 2005 WiMAX Forum certified products available late 2006 – 3.5GHz International Broadband Spectrum first choice General Availability 1st half of 2007 Plan to emerge as a viable competitor to 3G Technologies Fuelled by deployment of WiBro in South Korea – WiBro is a WiMAX Forum supported Standard Mobile WiMAX as it is commonly called applies to 802.16 e or 16 (2005) which was ratified in December 2005. The WiMAX Forum is still stating that 802.16 2005 certified products will be available by the end of this year and they have opened a second certification lab in Korea to support this plan… but I feel this may change due to the amount of work required by suppliers to make this happen. AND, System Profiles have yet to be approved by the WiMAX Forum Board. Both fixed and mobile access define 3.5GHz – as one of the frequencies to be included in the release 1 profiles and this frequency can be used in most places on the planet except the USA. But, 3.5 GHz is not the optimal frequency to use for Mobility due to the Doppler effect which is inherent to moving vehicles.

Certification Profiles 802.16 (2004) - Release 1 System Profile WiMAX Forum Spectrum Duplexing Chan. Width 3.5 GHz TDD 3.5 MHz 7 MHz FDD 5.8 GHz 10 MHz Fixed WiMAX IEEE 802.16-2004, OFDM Access: Fixed Nomadic Airspan is one of the few suppliers to have product certified by the WiMAX Forum testing lab. This slide shows those Certification Profiles which include Spectrum and Duplexing and Channel Widths used in the certification process. Certification has happened in both the 3.5 GHz TDD and FDD profiles using 3.5 MHz channels and work is continuing towards certification in the 3.5 GHz, 7 MHz channel widths for both TDD and FDD and in the 5.8 GHz, 10 MHz profiles. Some manufacturers are actually by-passing the Fixed WiMAX round all together – opting to jump into the market only with Mobile WiMAX products. In my opinion fixed WiMAX has many long term applications such as high capacity backhaul for Cellular and WiMAX end-users. Also, Airspan is providing an upgrade path from Fixed to Mobile WiMAX without a hardware change out by using Software Defined Radio technology available from picoChip. Modulation OFDM Progress…Where We Are IEEE 802.16 (2004)

Certification Profiles 802.16 (2005) - Release 1 SOFDMA allows channel Sizes up to 20MHz System Profile WiMAX Forum Spectrum Duplexing Chan. Width 2.3 GHz TDD 5 MHz 7 MHz 8.75 MHz 10 MHz 2.5 GHz 3.5 GHz Mobile WiMAX IEEE 802.16-2005, SOFDA Access: Fixed Nomadic Portable Mobile The IEEE 802.16 (2005) standard was ratified in December 2005. A key technology built into this standard is Scalable Orthogonal Frequency Division Multiple Access (SOFDMA) which improves multi-path performance for NLOS environments. Although SOFDMA can support channel bandwidths from 1.25 to 20 MHz, Release 1 profiles will only allow 5MHz, 7 MHz, 8.75 MHz and 10 MHz channel bandwidths as shown for 2.3 GHz, 2.5 GHz and 3.5 GHz. Practically speaking, certified mobile WiMAX products should be available by the end of 2007. Modulation (S)OFDMA IEEE 802.16 (2005) Progress – NEXT

AS.MAX: City-Wide Wi-Fi Hotzones With Handoff For Mobile Users MicroMAX-SDR WiMAX base station ProST – converts WiMAX to WiFi WiFi coverage range of 300m (Outdoors) Office floor -coverage with a single unit EasyST – tabletop WiMAX CPE WiMAX ProST Mobile WiMAX Availability of equipment based on 802.16e from 2007 EasyST Wi-Fi WiFi PC card Here is a frequency variant from those currently approved that Airspan is deploying today in Tokyo at 4.9GHz. A real life example of the start of WiMAX and WiFi network interconnection can be seen in Hong Kong implemented by Yozan. This $46 Million dollar project is using Airspan WiMAX and WiFi devices… allows home, Corporate and Mobile clients access to Internet, voice and video services. In this slide we see the large wireless access footprint provided by the Airspan MicroMAX software defined radio and the smaller WiFi footprint provided off of light poles and in homes, offices and vehicles by the EasyST, and ProST devices connected to the Public Domain backbone via WiMAX and connected to the end user via WiFi. The whole network plan is based upon an upgrade to the “e” (or 2005) standard by early 2008. WiFi/Cellular Dual-mode PC card WiFi/Cellular Dual-mode PC card EasyST HOME CORPORATE OFFICE PUBLIC DOMAIN FIBER OPTICS The optimal WiMAX / Wi-Fi Deployment Technology

ProST-WiFi: WiMAX + Wi-Fi ProST with integrated WiFi Access Point All Outdoor Solution AC or DC Outdoor Adapter to provide Power Total power consumption less than 18 Watts WiFi Antenna connects using a TNC connector in the bottom of ProST-WiFi WiFi Capabilities: 802.11b/g at 2.4 GHz WEP, WPA Security Multiple Virtual Access Points: 16 SSIDs SSID to VLAN tagging VLAN to 802.16 QoS Service Flow Mapping Gateway Functions: DHCP Server NAT PPPoE client Wi-Fi VoIP Phone WiFi Laptop All Outdoor ProST-WiFi Sony PSP This is an all out door solution which delivers WiFi voice and data services to the end user devices. The ProST WiMAX point to multi-point network nodes are served from the AS.MicroMAX SDR Base Station Radio which is connected to the PSTN and the Internet. Upon completion in mid 2007, there will be over 3,000 base stations and 30,000 WiFi access hotspots in downtown Tokyo. One of the truly unique elements of this network is that it supports 16 SSIDs with VLAN tagging. Therefore, up to 16 ISPs can deliver unique content with different QoS requirements for voice or gaming or …you name it while the customer roams downtown Tokyo!

World’s First Mobile WiMAX USB Device from Airspan Networks Tri Band 2.3-2.6 GHz 3.2-3.7 GHz 4.9-5.4 GHz Here is the World’s First Mobile WiMAX USB Device designed for “Wave 2” Mobile WiMAX with Tri-Band: 2.3 - 2.5 GHz, 3.3-3.7 GHz, 4.9-5.4 GHz. This device supports MIMO and Beam-forming Antennas, Handover, Sleep, Idle and Paging; It Includes a Wi-Finder Mode, for both Wi-Fi and WiMAX plus a SIM Card. It allows integration with other devices that support USB 2.0 interfaces, not just laptops. And, while the target price is $150, we all know that Intel’s vision is to have WiMAX included inside laptops and mobile appliances just as they currently have WiFi. The result is a dramatically different business model for any carrier…who now will spend $0 for CPE. Supports: 2X2 MIMO, Beam Forming, Handover, Sleep, Idle, Paging, WiFi Finder Mode and WiMAX Finder Mode Target Introduction Price $150 US

Strategic Questions… Will Fixed WiMAX Quickly Become Obsolete? Should Operators start with Fixed WiMAX Can Mobile WiMAX compete successfully with the Cellular technologies for Data Services? And so, let me close by posing a number of strategic questions that any carrier will want to consider before deploying WiMAX. Airspan stands ready to assist. In my opinion Fixed WiMAX will not quickly become obsolete for a couple of reasons --- First of all operators can purchase Fixed WiMAX technology and upgrade to Mobile as the market demands by changing out the software and adding dual mode devices CPE where required… Airspan can run a Fixed WiMAX and a Mobile WiMAX solution from the same base radio station location. In this case some customers will continue with Fixed WiMAX only using it in a home or office environment. Secondly, Fixed WiMAX is an excellent and cost effective solution for both Cellular and WiMAX data services. Should Operators start with Fixed WiMAX – this is a question which will be answered by the particular business case the operator is running. Incumbents usually have a solid base of Cellular access, and technologies such as EVDO makes sense due to the incremental cost on the existing infrastructure – New entrants who want to compete in the VoIP and data services can start with Fixed WiMAX and upgrade the software of the base stations when mobile WIMAX makes sense in the market. Having a strategic plan which includes an overlay network for fixed and mobile customers is cost effective and future proof. Can mobile WiMAX compete successfully with Cellular technologies for data services – Absolutely – and the strategy of bringing Mobile WiMAX in, will reduce future risk due to the data capacities and standard protocols that will be available for future end user devices. WiMAX offers greater spectrum diversity, larger channel widths and the benefit of SOFDMA and other advances. Fixed and Mobile WiMAX can provide a better business case and the case will continue to improve as the price of CPE equipment is reduced due to multiple choices for standard equipment. Couple the advantages of WiMAX with the ubiquity of WiFi and a winning combination for both voice and data services can be obtained.

Thank You. Dick Lee General Manager North America and Caribbean dlee@airspan.com Ian Lenathen Senior Regional Sales Director – Canada, Bermuda and Caribbean ilenathen@airspan.com Ian and I are around this evening for any follow-up questions that you may have. Thank you.