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Uplink Control PHY Design for HARQ Tri-State Feedback IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-09/0890r1 Date.

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Presentation on theme: "Uplink Control PHY Design for HARQ Tri-State Feedback IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-09/0890r1 Date."— Presentation transcript:

1 Uplink Control PHY Design for HARQ Tri-State Feedback IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-09/0890r1 Date Submitted: 2009-4-27 Source: Zheng Yan-Xiu, Yu-Chuan Fang, Chang-Lan Tsai, Chung-Lien Ho, Hsi-Min Hsiao E-mail: zhengyanxiu@itri.org.tw.zhengyanxiu@itri.org.tw ITRI Venue: Re: IEEE 802.16m-09/0020, Call for contributions on 16m AWD content. Amendment Working Document (IEEE 802.16m-09/0010r1a). Chapter 15.3.9.2.2 UL HARQ feedback control channel Base Contribution: Purpose: To be discussed and approval by IEEE 802.16m TG 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 Motivation This contribution proposes uplink control PHY structure for tri-state HARQ feedback The feedback facilitates HARQ buffer management by three states ACK/NACK/DROP The buffer management occurs for high throughput scenario and each HARQ process will carry large HARQ burst Since larger burst applied in this scenario, we can apply more resource for the tri-state HARQ feedback

3 1-bit HARQ feedback Four orthogonal sequences indexes ACK/NACK Each MS chooses one sequence from even numbered channel or odd number numbered channel The MS sends the chosen sequence as the HARQ feedback Sequence indexOrthogonal sequence1-bit Feedabck 0 [+1 +1 +1 +1]Even numbered channel ACK 1[+1 -1 +1 -1]Even numbered channel NACK 2[+1 +1 -1 -1]Odd numbered channel ACK 3[+1 -1 -1 +1]Odd numbered channel NACK

4 Tri-State HARQ feedback Three sequences are chosen from orthogonal sequences. The power boosting level is identical to 1-bit HARQ feedback Sequence indexOrthogonal sequencesTri-state HARQ feedback 0[+1 +1 +1 +1]ACK 1[+ 1 +1 -1 -1]NACK 2[+1 -1 +1 -1]DROP 3[+1 - 1 -1 +1]Reserved

5 Nine-State HARQ feedback Nine sequences constructed by orthogonal sequences with linear combination. Unified receiver architecture can be applied The power boosting level is identical to 1-bit HARQ feedback Sequence index SequencesNine-state HARQ feedback 0[-0.6124+3.4729j 2.9141 + 0.5138j 1.264 + 0.2229j 0.187-1.0607j] ACK/ACK 1[-0.6124-0.2229j -1.264+3.4729j -0.187+0.5138j 2.9141+1.0607j] ACK/NACK 2[-0.6124+1.0607j -1.8371-1.0607j 1.8371+1.0607j -1.8371+3.182j] ACK/DROP 3[-0.6124-0.5138j 0.187-0.2229j -2.9141+3.4729j -1.264-1.0607j] NACK/ACK 4[-0.6124+0.5138j 0.187+0.2229j -2.9141-3.4729j -1.264+1.0607j] NACK/NACK 5[-0.6124-1.0607j -1.8371+1.0607j 1.8371-1.0607j -1.8371-3.182j] NACK/DROP 6[-0.6124+0.2229j -1.264-3.4729j -0.187-0.5138j 2.9141-1.0607j] DROP/ACK 7[-0.6124-3.4729j 2.9141-0.5138j 1.264-0.2229j 0.187+1.0607j] DROP/NACK 8[4.899 0 0 0 ] DROP/DROP

6 Simulation Environment HMT is referred to AWD Simulation parameters are referred to EVM Channel Bandwidth10MHz Over-sampling Factor28/25 FFT Size1024 Cyclic prefix (CP) ratio 1/8 Channel conditionPB3, VA120, VA350 The number of antennas Tx:1, Rx:2 ModulationBPSK/MPSK FMT size2x6 ReceiverHARQ FB: non-coherent detection, MLD

7 Performance Comparison Tri-State HARQ feedback provides similar performance to 1-bit HARQ feedback Nine-State HARQ feedback provides similar performance to 1-bit HARQ feedback

8 Conclusion The proposed tri-state HARQ feedback provides better performance than 1-bit HARQ feedback Nine-state HARQ feedback provide similar performance to 1-bit HARQ feedback with identical radio resource Recommend to adopt the proposed text #6 in C802.16m-09/0894r2 Recommend to adopt the proposed text #7 in C802.16m-09/0894r2

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