1. Comment on Relay Frame Structure IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C802.16m-08/1312r2 Date Submitted: 2008-11-3 Source: Kanchei (Ken) Loa, Yi-Hsueh Tsai, Chun-Yen Hsu, Youn-Tai Lee E-mail: loa@iii.org.twloa@iii.org.tw Chih-Wei Su, Yi-Ting Lin, Tsung-Yu Tsai, Chiu-Wen Chen, Jiun-Je Jian Institute for Information Industry Yung-Ting Lee, Hua-Chiang Yin, Coiler Shiann-Tsong Sheu National Central University David W. Lin National Chiao Tung University * http://standards.ieee.org/faqs/affiliationFAQ.html Venue: IEEE 802.16m-08/040 Call for Comments and Contributions on Project 802.16m System Description Document (SDD) Base Contribution: N/A Purpose: Propose modifications on relay frame structure 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. 2-hop TTR frame structure  In SDD there are two options defined for the RS frame structure namely option 1 and option 2. For the 2-hop relay system, the TTR RS frame structure for option 1 and option 2 are identical. Therefore, we propose a 2-hop TTR RS frame structure.

3. 2-hop TTR frame structure  In current defination, the zone is an integer number of subframes which is completely redundant. We propose to redefine the RS transmit and receive operation in DL/UL based on subframes such that it is consistent with the basic frame structure.

4. Proposed SDD Text [Insert the following figure in line 25 of page 47 [Insert the following figure in line 25 of page 47:] Figure xx 2-hop TTR Relay Frame structure

5. Proposed SDD Text [Insert the following figure in line 25 of page 47 [Insert the following figure in line 25 of page 47:]  DL subframe (DL SF): A subframe that an access station can transmit to its subordinate stations (i.e., RSs or SSs).  UL subframe (UL SF): A subframe that an access station can receive from its subordinate stations (i.e., RSs or SSs)  receive subframe (Rx SF): A subframe located in an RS frame that the RS can receive from its superordinate station (i.e., BS or RS).  transmit subframe (Tx SF): A subframe located in an RS frame that the RS can transmit to its superordinate station (i.e., BS or RS).

6. 3 + -hop TTR frame structure  For 3 + -hop relay system, there are two options of frame structures defined in current SDD. –Unidirectional relay zone (option 1) –Bidirectional relay zone (option 2)  We proposed to adopt both options in SDD. However, in order to avoid the complexity of coexistence, we proposed that they must not coexist in a 16m relay network. Option 1 has been studied extensively in 16j. Option 2 has the benefits of scheduling efficiency, but it requires detail technical design to resolve interference and power management issues.

7. 3 + -hop frame structure (option 1)

8. 3 + -hop frame structure (option 2)

9. Proposed SDD Text [Replace the text in line 26~27 of page 47 as following indicates [Replace the text in line 26~27 of page 47 as following indicates:]  There are tho options for the more-than-2-hop Relay frame structure captured in Figure 25, and Figure 26. They shall not coexist in a 16m relay network.

10. STR frame structure  STR been studied extensively in 16j. We proposed to adopt STR relay frame structure.  When there is no TTR RSs coexsting with STR RSs, the relay frame structure is the same as the basic frame structure.  The conxistence with TTR RSs (including option 1 and option 2) is FFS

11. Proposed SDD Text [Insert the following figure in line 25 of page 47 [Insert the following figure in line 25 of page 47:] Figure yyy STR Relay Frame structure

12. Proposed SDD Text [Insert the following figure in line 25 of page 47 [Insert the following figure in line 25 of page 47:]  DL subframe (DL SF): A subframe that an access station can transmit to its subordinate stations (i.e., RSs or SSs).  UL subframe (UL SF): A subframe that an access station can receive from its subordinate stations (i.e., RSs or SSs)