1. 1Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 1 Deployment of OFDMA Based Solution in 8023.22 Scenario IEEE P802.22 Wireless RANs Date: 2006-01-11 Notice: This document has been prepared to assist IEEE 802.22. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.22. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures http://standards.ieee.org/guides/bylaws/sb-bylaws.pdf including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chairhttp://standards.ieee.org/guides/bylaws/sb-bylaws.pdf Carl R. StevensonCarl R. Stevenson as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.22 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at patcom@iee.org. patcom@iee.org >

2. 2Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 2 Abstract This contribution provides an example of WRAN deployment in a real rural area. Its purpose is mainly to demonstrate the capability of OFDMA, as a WRAN solution, in a large area, which has diverse geographical features. Additionally, we analyze in the contribution the effect of the synchronization and coordination on the frequency plans, and the ability to re-use the available frequencies as much as possible.

3. 3Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 3 Deployment of OFDMA Based Solution in 802.22 Scenario Eli Sofer Runcom Technologies Ltd

4. 4Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 4 Contents Deployment Scenario Coverage Capacity Carrier to Interference Ratio in different configurations

5. 5Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 5 The Terrain Area chosen for the analysis is a 50km x 50km which include valleys and mountainous areas

6. 6Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 6 Assuming an average population spread of 1.25 persons/sq. km With 20% penetration,there are 625 users in the area. Assuming population density is not uniform, 5 regions were defined according to the geographical features of the terrain. Different density was assigned to each All the user`s links are 1.5Mbps peak data rate. It is assumed that a user uses the link about 10% of the time, and the ratio between the peak rate and the average rate during a session is 5 User Density

7. 7Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 7 Number of users in each area

8. 8Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 8 Main System Parameters Sample of the possible combinations

9. 9Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 9 The system used adaptive modulation. Due to sub-channelization, the system is capable of operating over a large dynamic range of C/I levels and signal strength The CINR refers to the CINR of a full channel, While interference and noise are reduced with sub-channelization, the wanted carrier level is concentrated in the elected sub-Channel and hence provide better CNIR and sensitivity

10. 10Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 10 Base Station Antenna Pattern Commercial antenna of 15 dBi gain in the operating frequency

11. 11Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 11 Multiple Knife-edge Model is used since the model specified in the Channel Model Document does not take into account the information provided by a digital terrain map. For fade margin, Rice statistics with 99% time availability is used. The Ricean K-factor is K=0 for NLOS propagation and k=10 otherwise. Propagation Model

12. 12Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 12 Site Location In order to achieve coverage, 11 Base Stations are needed. The sites were selected out of a list of 392 high points in the area. The sites are indicated by blue dot on the map.

13. 13Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 13 Coverage map-Downlink The Received Signal Strength, including fade margins are depicted in the coverage map. Various signal levels are shown in colors. The red color indicates a received signal indicates a received signal strength below –111 dBm Site location provide approximately 95% area coverage

14. 14Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 14 Coverage map- Uplink Only 1.98% of the area is covered below the minimal level, the red zone

15. 15Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 15 Capacity Capacity in Mbps, carried by each sector, according to the areas associated with it. Maximum capacity required by a sector is of 1.2Mbps in average (10 sub-channels in QPSK, code rate ½. For Peak data rate of 1.5Mbps, 122 sub-channels are needed with QPSK 1/2

16. 16Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 16 Coordinated Synchronous Configuration Partial usage of sub-channels (PUSC) deployment is chosen. Each sector is accommodated with 10 sub-channels. This implies a target level of CINR of 1.45 dB compared to the 0.4 dB CINR required for 12 sub-channels with QPSK ½

17. 17Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 17 Synchronous Configuration Each sector uses a different permutation base. As a result, all the sub-channels (including the cchannel) introduce the same level of interference, approximated as a single sub carrier coinciding between any two sub-channels.

18. 18Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 18 Asynchronous Configuration Time frames between Base Stations are not synchronized, hence in TDD mode, CPE to CPE as well as Base Station to Base Station interference can be experienced in addition to the interference analyzed in the previous configurations. Inferior performance should be expected in this scenario

19. 19Runcom Technologies Ltd. Submission Eli Sofer, Runcom January 2006 Doc.: IEEE802.22-06-0001r1 Slide 19 Low Interference Configuration Macro Diversity Path1 Path2 Low Power Transmission Less than 1W BS1 p-t-mp BS2 BS3 Array of three separate antennas Area 1 Area 2 HO