1. Proposed Text on Section 15.3.5.2.2 Miniband Permutation of 802.16m Amendment Document Number: IEEE C80216m-09_0623 Date Submitted: 2009-03-02 Source: HanGyu Cho, Seunghyun Kang, Jong Young Han, Sunam Kim, Email: {hgcho, sh_kang Jin Sam Kwak fanaticey, snkim86, samji} @lge.com LG Electronics Venue: “802.16m AWD”: IEEE 802.16m-09/0012. ”Call for Contribution on Project 802.16m Amendment Working Document (AWD) Content” Target topic: Call for Comments on Amendment Working Document Purpose: To provide proposed text on DL subcarrier permutation to be approved by TGm and adopted in the Amendment Working Document 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 located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2. Motivation In the current IEEE 802.16m Amendment Working Document (IEEE 802.16m-09/0010), the miniband permutation formula in the section 15.3.5.2.2 (DL) and 15.3.8.2.2 (UL) is TBD So far, there have been many miniband permutation formulas proposed by each company This contribution reviews those rules and suggests one miniband permutation formula used for both DL and UL.

3. Miniband Permutation Permutes the PRU MB s to insure frequency diverse PRUs are allocated to each frequency partition. Miniband permutation

4. Miniband Permutations Considered LGE ’ s proposed MB permutation where

5. Miniband Permutations Considered Intel (IEEE 802.16m-08/1508r1) where PermSeq(k) is the k-th elelment of the S- Random permutation sequence of length L MB from the table Samsung (IEEE 802.16m-08/1508r1) where BRO k (y) indicates the bit-reversed k-bit value of y

6. Miniband Permutations Considered Motorola (IEEE 802.16m-08/1508r1) ITRI (IEEE 802.16m-08/1508r1)

7. Miniband Permutations Considered ZTE (IEEE 802.16m-08/1508r1) where

8. Investigation on Miniband Permutation of Each Company LGE Selecting one miniband per each subband in order Samsung Selecting one miniband per each subband in order When L MB is not the integer multiple of subband size ( N 1 ), it does not work Usually, L MB is the integer multiple of subband size (N 1 ) But, L_MB could not be in the unit of N 1, e.g., when considering guard- carriers (which could not be in the unit of N 1 ) Intel We don’t need to use the permutation sequence table designed for subcarrier permutation in miniband permutation Motorola Dividing total L MB minibands into 4 groups and selecting one miniband per each group in order Could be worse when # of miniband per freq. partition is smaller than 4, e.g., L MB =12 & FPCT=4 with equal BW When L MB is not the integer multiple of subband size ( N 1 ), it does not work

9. Conclusions Most proposals show the similar diversity gain in terms of LLS results Please refer to Intel’s contribution (IEEE C802.16m-09/0251) LGE’s proposed MB permutation is simple and has no restriction on L MB size

10. Proposed Text Adopt the the miniband permutation equation in the page 4 of this contribution for PRU MB to PPRU MB mapping in equation (178) of page 26 of IEEE 802.16m-09/0010 Also, adopt the the miniband permutation equation in the page 4 of this contribution for PRU MB to PPRU MB mapping in equation (190) of page 38 of IEEE 802.16m-09/0010