1. Proposal for multi-hop relay simulation test scenario in Relay Evaluation Methodology IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-08/1258r1 Date Submitted: 2008-11-06. Source: Young-il Kim, Perumal Ramesh Babu, Jisoo Park, Khishigjargal Voice: ETRI E-mail:{yikim, ramesh.babu,jsp, khishig }@etri.re.kryikim, khishig@etri.re.kr 161 Gajeong-dong Yuseong-gu, Taejeon 305-700, Korea Kyu Ha Lee Voice: Samsung Thales E-mail:kyuha.lee@samsung.comkyuha.lee@samsung.com Suk Chan Kim, Dong Heon Lee Voice: Pusan National University E-mail: { sckim, leedheon }@pusan.ac.kr * sckim, leedheon@pusan.ac.kr http://standards.ieee.org/faqs/affiliationFAQ.html Venue: IEEE Session #58, Dalas, USA Base Contribution: IEEE C802.16m-08/1258 Purpose: For TGm discussion and adoption of 802.16m EMD text. Notice: This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who 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 IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s 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 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2. Relay Test Scenarios  Goal of Relay Deployment  Throughput enhancement  Cell coverage extension  Test Scenario for evaluation of throughput enhancement  14.1.1.1 Two Relays per Sector Scenario in IEEE 802.16m EMD  Test Scenario for evaluation of coverage extension  Coverage extension beyond the cell boundary: Multi-hop link  RS position: Apex of hexagon cell or Half of hexagon side(Boresight)  Coverage extension within cell boundary: ASR(Artificial Shadow Region)

3. Coverage Extension Scenario of Two Relays per Sector (1)  Distances between BSs are widened and RSs are positioned at the edge and outside of the BS coverage to configure multi-hop link.  RSs are located along the boresight direction of the BS sector antenna to reduce interference from neighboring cells.

4. The positions of the relays are determined by the BS-RS1 distance r1 and the BS-RS2 distance r2. The angle  between the boresight direction of the BS sector antenna and the LOS to the RS is 0 0 (refer to [1]). In this topology distance between BS-BS is r3 which is r1+ r2. Coverage Extension Scenario of Two Relays per Sector (2)

5. Performance Evaluation( example) Coverage Extension Scenario of Two Relays per Sector (IEEE 802.16j) SINR (dB)

6. Artificial Shadow Region (ASR) Scenario(1) This scenario is also for the evaluation of coverage extension. RS can provide service for users in coverage holes that exist due to deep-shadow fading in valleys between buildings. Shadow fading values for MSs, located in the ASR, are artificially raised above the threshold, which depends on the shadow fading model.

7. Artificial Shadow Region (ASR) Scenario(2) The radius r 1 of ASR is calculated by where, A is the cell area(km 2 ), R is the constant that can be determined from the threshold value of magnitude of shadow fading, and N denotes the number of ASR per cell. Positions of ASR are determined by the same way as described in Section 14.1.1.1 [1] and RSs are located in that region.

8. Determination of R (example) Shadow fading generation by spatial correlation model [2] If magnitudes of shadow fading of ASR are determined to be higher than the threshold value of 15dB, then R is 3 %.

9. Artificial Shadow Region (example) Shadow fading (dB)

10. Performance Evaluation (example) Artificial Shadow Region (ASR) Scenario Without RSs SINR (dB)

11. Performance Evaluation (example) Artificial Shadow Region (ASR) Scenario With RSs SINR (dB)

12. RS Allocation (2)

14. RS Allocation (3), (4)

15. RS Allocation (3)

16. RS Allocation (4)

17. RS Allocation(1) RS Allocation(2) RS Allocation(4)RS Allocation(3)

18. References [1] R. Srinivasan, J. Zhuang, L. Jalloul, R. Novak, J. Park, “Project 802.16m Evaluation Methodology Document (EMD),” IEEE C80216m-08-004/r3, Oct. 2, 2008. [2] IEEE 802.16j-06/013r3, “Multi-hop Relay System Evaluation Methodology [Channel Model and Performance Metric],” IEEE 802.16's Relay Task Group, Feb. 2007.