1. Proposed Change to Subband Partitioning and Frequency Partition Document Number: IEEE S802.16m-09/0498 Date Submitted: 2009-03-06 Source: Chang-Lan Tsai, Zheng Yan-Xiu, Chung-Lien Ho, Email: {tsaichangl, zhengyanxiu}@itri.org.tw Yu-Chuan Fang, Hsi-Min Hsiao, Ren-Jr Chen ITRI Venue: IEEE 802.16m-09/0012 “Call for Comments and Contributions on Project 802.16m Amendment Working Document” Topic: “Downlink Physical Structure” Base Contribution: C80216m-09_0498r2.doc Purpose: In support of contribution IEEE C80216m-09_0498r2, regarding AWD comment on modifying subband partitioning and frequency partitioning. 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 Subband Allocation (1/3) As the result of Eqn. (175) and (177) in AWD, every 4 PRUs are grouped, and each group is a possible subband location. –There are maximum N sub subbands. –The locations are indexed from 0 to N sub –1. N PRU =48, N sub = 12.

3. 3 Subband Allocation (2/3) There are K SB subbands. The allocation of subbands – –Eqn. (175)

4. 4 Subband Allocation (3/3) Subband allocation for all K SB values. –

5. 5 Frequency Partition FPCT: number of frequency partitions FPSC: number of subbands for FP 1, FP 2, …

6. 6 Non-fixed Subband Allocation and the Frequency Partition (1/2) In some cases, the subband allocation is totally different – The subbands allocated to frequency partitions are totally different since the subbands are different.

7. 7 Non-fixed Subband Allocation and the Frequency Partition (2/2) Suppose the frequency partition is used for E- MBS, fractional frequency reuse (FFR) purposes, or femtocell purposes, the terminals using the resource in that frequency partition is required to feedback new channel quality indicator (CQI) and the base station has to adjust the link quality of the terminals.

8. 8 Fixed Subband Allocation (1/2) We propose a modification to subband allocation by designing –a basic sequence B = {b(0), b(1), …, b(N sub – 1)}, –b(i) {0, 1,, N sub – 1} and b(i) b(j) for all i j. The subbands are allocated at –S K SB = { b(0), b(1), …, b(K SB – 1) }. The minibands are allocated at –M K MB = { b(K SB ), b(K SB +1), …, b(N sub – 1) }.

9. 9 Fixed Subband Allocation (2/2) B = {0, 6, 3, 9, 1, 4, 7, 10, 2, 5, 8, 11} for N sub = 12.

10. 10 Frequency Partition Incorporating with the new aligned subband allocation, the front subbands are allocated to FP 1, FP 2, …, first. The rest subbands are allocated to FP 0.

11. 11 Suggest Remedy for Subband Partition

12. 12 Suggest Remedy for Frequency Partition