1. Resource granularity for unicast and E-MBS FDM multiplexing IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE C80216m-09_0405r1 Date Submitted: 2009-02-27 Source: Wookbong Lee, Dongcheol Kim, Jin Sam Kwak, Sungho Moon, HanGyu Cho and Bin-Chul Ihm wbong@lge.comwbong@lge.com LG Electronics Venue: IEEE 802.16m Session#60, Vancouver, Canada TGmSDD Change Request for 16m SDD (80216m-08_003r7). Base Contributions: N/A Re: Purpose: To discuss and adopt in TGm 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. Overview In current document, –When E-MBS is frequency division multiplexed with unicast, the PRU resources in units of N2 PRUs are partitioned into two sets; one meant for unicast data and the other for E-MBS data. E-MBS channel shows usually very high delay spread –N2 level partition may degrades channel estimation performance In this contribution, we compare N1 level channel estimation and N2 level channel estimation in various conditions

3. Simulation Results 1/3 DRU permutation, Pilot pattern A, SFBC are used in this simulation set up. Almost 3dB performance difference is shown at 1% BLER.

4. Simulation Results 2/3 DRU permutation, Pilot pattern A, SM are used in this simulation set up. 1PRU based channel estimation does not working in this scenario.

5. Simulation Results 3/3 8.3% pilot pattern and Pattern A in SDD, SM are used in this simulation set up. This is worst case scenario for 4PRU CE, which is miniband CRU for 1PRU CE and subband CRU for 4PRU CE. About1dB performance difference is shown at 1% BLER.

6. Proposed text Line 22-23, page 127, modify texts as follows: When E-MBS is frequency division multiplexed with unicast, the PRU resources in units of N2 PRUs are p artitioned into two sets; one meant for unicast data an d the other for E-MBS data.

7. Pilot pattern used in simulation Pattern A in SDD: Unicast pilot pattern (2-stream) Pilot Pattern : overhead 8.3% per stream

8. Simulation parameters OFDM Parameters FFT Size 1024 (10MHz) CP = 1/8 Tu Channel model MBSFN channel for ISD 1.5km, MS Speed = 3kmph or 120 kmph CE parameters 2-D MMSE, Window size = 1PRU or 4PRU, SNR, Doppler, Delay spread were known Pilot Pattern SDD unicast 2-stream pilot pattern Data Size 4 LRU Permutation DRU for both or 4PRU Channel estimation – Subband CRU, 1PRU Channel estimation - Miniband based CRU MIMO mode 2Tx, 2Rx, SFBC or Rate-2 SM MIMO Detector Soft MMSE detector MCS 16QAM ½ or ¾ with LTE-FEC with 8-iteration decoding Pilot Boosting 0dB