A Simple Comparison of Latency Between 802 16

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A Simple Comparison of Latency Between 802. 16 m Relay Frame Structures IEEE 802.

A Simple Comparison of Latency Between 802. 16 m Relay Frame Structures IEEE 802. 16 Presentation Submission Template (Rev. 9) Document Number: IEEE C 802. 16 m-08/926 Date Submitted: 2008 -09 -05 Source: Aeran Youn, Jin Sam Kwak, Ji Wook Chung Voice: +82 -31 -450 -7188 e-mail : {aryoun; samji; jw. Chung}@lge. com LG Electronics LG R&D Complex, 533 Hogye-1 dong, Dongan-gu, Anyang, 431 -749, Korea Ki-Dong, Li-Hsiang e-mail : {kidonglee; lsun}@lge. com LG Electronics Mobile Research, San Diego Venue: SDD Session 56 Cleanup; in response to the TGm Call for Contributions and Comments 802. 16 m-08/033 for Session 57 Purpose: This contribution proposes clarification of latency based on Relay Frame Structure in IEEE 802. 16 m-08/003 r 4. 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: <http: //standards. ieee. org/guides/bylaws/sect 6 -7. html#6> and <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3>. Further information is located at <http: //standards. ieee. org/board/pat-material. html> and <http: //standards. ieee. org/board/pat >. 1

A Simple Comparison of Latency Between 802. 16 m Relay Frame Structures 2

A Simple Comparison of Latency Between 802. 16 m Relay Frame Structures 2

Contents • Introduction • Latency Comparison of Each Relay Frame structure – Option 1

Contents • Introduction • Latency Comparison of Each Relay Frame structure – Option 1 • Access-Relay/Transmit-Receive Zone • Relay-Access/Receive-Transmit Zone – Option 2 • MSs use only Access Zone for reception/transmission • MSs can use Bi-Directional transmit/Receive Zone for reception/transmission • Summary • References 3

Introduction • Latency Comparison with each relay frame structure – Option 1: The order

Introduction • Latency Comparison with each relay frame structure – Option 1: The order of DL subframe of the BS/RS • Access Zone/Relay Zone (Transmit Zone/Receive Zone) • Relay Zone/Access Zone (Receive Zone/Transmit Zone) – Option 2: Whether the MS can use Bi-directional Zone or not • MSs use only Access Zone for reception/transmission 16 m RS 2 16 m RS 3 • MSs can use Bi-Directional transmit/Receive Zone for 16 m MS 16 m RS 1 reception/transmission • Assumption 16 m MS 2 16 m MS 3 – TDD system in the legacy support mode 4 16 m BS

Option 1 case (Downlink) 16 m RS 2 16 m RS 3 • Access-Relay/Transmit-Receive

Option 1 case (Downlink) 16 m RS 2 16 m RS 3 • Access-Relay/Transmit-Receive Zone DL N frame 16 m MS DL N+1 frame UL UL BS L L L A RL RS 3 L L L T R L R T RS 2 L L L R T L T R RS 1 L L L T R L R T Legacy 16 m MS 2 16 m MS 3 DL Legacy 16 m BS 16 m RS 1 DL UL UL BS L L L A RL RS 3 L L L T R L R T RS 2 L L L R T L T R RS 1 L L L T R L R T N+2 frame e. g. , BS MS (using RS 3, RS 2, RS 1)Latency: 4 -frame (24 -subframe) – 2 -hop: 2 -frame(8 -subframe) ü BS(Nth[RL]: transmit) RS 3(Nth[R]: receive, N+1 th[T]: transmit) MS(N+1 th: receive) – 3 -hop: 3 -frame(17 -subframe) ü BS(Nth[RL]: transmit) RS 3(Nth[R]: receive, N+1 th[T]: transmit) RS 2(N+1 th[R]: receive, N+2 th[T]: transmit) MS(N+2 th: receive) – 4 -hop: 4 -frame(24 -subframe) ü BS(Nth[RL]: transmit) RS 3(Nth[R]: receive, 5 N+1 th[T]: transmit) RS 2(N+1 th[R]: receive, N+2 th[T]: transmit) RS 1(N+2 th[R]: receive, N+3 th[T]: transmit) MS(N+3 th: receive) N+3 frame

Option 1 case (Downlink) 16 m RS 2 16 m RS 3 • Relay-Access/Receive-Transmit

Option 1 case (Downlink) 16 m RS 2 16 m RS 3 • Relay-Access/Receive-Transmit Zone DL N frame 16 m MS DL N+1 frame UL UL BS L L L RL A L A RL RS 3 L L L R T RS 2 L L L T R RS 1 L L L R T Legacy 16 m BS 16 m RS 1 16 m MS 2 16 m MS 3 DL DL UL UL BS L L L RL A L A RL RS 3 L L L R T RS 2 L L L T R RS 1 L L L R T N+2 frame N+3 frame – 2 -hop: 2 -frame(10 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[R]: receive, N+1 th[T]: transmit) MS(N+1 th: receive) – 3 -hop: 3 -frame(17 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[R]: receive, N+1 th[T]: transmit) RS 2(N+1 th[R]: receive, N+2 th[T]: transmit) MS(N+2 th: receive) – 4 -hop: 4 -frame(26 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[R]: receive, N+1 th[T]: transmit) RS 2(N+1 th[R]: receive, N+2 th[T]: transmit) RS 1(N+2 th[R]: receive, N+3 th[T]: transmit) MS(N+3 th: receive) * [A]: 6 Access Zone, [RL]: Relay Zone, [R]: Receive Zone, [T]: Transmit Zone

Option 1 case (Uplink) • Access-Relay/Transmit-Receive Zone • Relay-Access/Receive-Transmit Zone 16 m MS DL

Option 1 case (Uplink) • Access-Relay/Transmit-Receive Zone • Relay-Access/Receive-Transmit Zone 16 m MS DL N frame DL UL N+1 frame L L L RL A L A RL RS 3 L L L R T RS 2 L L L T R RS 1 L L L R T Legacy 16 m RS 3 16 m BS 16 m MS 2 16 m MS 3 UL BS Legacy 16 m RS 1 16 m RS 2 DL DL UL UL BS L L L RL A L A RL RS 3 L L L R T RS 2 L L L T R RS 1 L L L R T N+2 frame N+3 frame – 2 -hop: 2 -frame(10 -subframe) • MS(Nth[R]: transmit) RS 3(Nth[R]: receive, N+1 th[T]: transmit) BS(N+1 th[RL]: receive) – 3 -hop: 3 -frame(17 -subframe) • MS(Nth[R]: transmit) RS 2(Nth[R]: receive, N+1 th[T]: transmit) RS 3(N+1 th[R]: receive, N+2 th[T]: transmit) BS(N+2 th[RL]: receive) – 4 -hop: 4 -frame(26 -subframe) • MS(Nth[R]: transmit) RS 1(Nth[R]: receive, 7 N+1 th[T]: transmit) RS 2(N+1 th[R]: receive, N+2 th[T]: transmit) RS 3(N+2 th[R]: receive, N+3 th[T]: transmit) BS(N+3 th[RL]: receive)

Option 2 case (Downlink) • MSs use Access Zone for reception 16 m MS

Option 2 case (Downlink) • MSs use Access Zone for reception 16 m MS DL N frame DL N+1 frame UL L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T Legacy 16 m RS 3 16 m BS UL BS Legacy 16 m RS 1 16 m RS 2 16 m MS 3 DL DL UL UL BS L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T N+2 frame N+3 frame – 2 -hop: 2 -frame(8 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[Bi-R]: receive, N+1 th[A]: transmit) MS(N+1 th: receive) – 3 -hop: 2 -frame(8 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[Bi-R]: receive, Nth[Bi-T]: transmit) RS 2(Nth[Bi-R]: receive, N+1 th[A]: transmit) MS(N+1 th: receive) – 4 -hop: 3 -frame(16 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[Bi-R]: receive, Nth[Bi-T]: transmit) RS 2(Nth[Bi-R]: receive, N+1 th[Bi-T]: transmit) RS 1(N+1 th[Bi-R]: receive, N+2 th[A]: transmit) MS(N+2 th: receive) 8 Bi-directional Receive Zone, [Bi-T]: Bi-Directional Transmit Zone * [A]: Access Zone, [RL]: Relay Zone, [Bi-R]:

Option 2 case (Downlink) • MSs use Bi-directional transmit Zone for reception DL N

Option 2 case (Downlink) • MSs use Bi-directional transmit Zone for reception DL N frame DL N+1 frame UL 16 m RS 2 UL L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T BS Legacy DL 16 m MS 16 m RS 3 16 m BS 16 m RS 1 16 m MS 2 16 m MS 3 DL UL UL BS L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T N+2 frame N+3 frame – 2 -hop: 1 -frame(4 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[Bi-R]: receive, Nth[Bi-T]: transmit) MS(Nth: receive) – 3 -hop: 2 -frame(8 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[Bi-R]: receive, Nth[Bi-T]: transmit) RS 2(Nth[Bi-R]: receive, N+1 th[A]: transmit) MS(N+1 th: receive) – 4 -hop: 2 -frame(12 -subframe) • BS(Nth[RL]: transmit) RS 3(Nth[Bi-R]: receive, Nth[Bi-T]: transmit) RS 2(Nth[Bi-R]: receive, N+1 th[Bi-T]: 9 transmit) RS 1(N+1 th[Bi-R]: receive, N+1 th[Bi-T]: transmit) MS(N+1 th: receive)

Option 2 case (Uplink) 16 m RS 2 16 m RS 3 • MSs

Option 2 case (Uplink) 16 m RS 2 16 m RS 3 • MSs use Access Zone for transmission 16 m MS DL N frame DL N+1 frame UL UL BS L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T Legacy 16 m BS 16 m RS 1 16 m MS 2 16 m MS 3 DL DL UL UL BS L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T N+2 frame N+3 frame – 2 -hop: 2 -frame(10 -subframe) • MS(Nth[A]: transmit) RS 3(Nth[A]: receive, N+1 th[Bi-T]: transmit) BS(N+1 th[RL]: receive) – 3 -hop: 2 -frame(10 -subframe) • MS(Nth[A]: transmit) RS 2(Nth[A]: receive, N+1 th[Bi-T]: transmit) RS 3(N+1 th[Bi-R]: receive, N+1 th[Bi. T]: transmit) BS(N+1 th[RL]: receive) – 4 -hop: 3 -frame(18 -subframe) • MS(Nth[A]: transmit) RS 1(Nth[A]: receive, N+1 th[Bi-T]: transmit) RS 2(N+1 th[Bi-R]: receive, N+2 th[Bi. T]: transmit) RS 3(N+1 th[Bi-R]: receive, N+2 th[Bi-T]: transmit) BS(N+2 th[RL]: receive) * [A]: Access Zone, [RL]: Relay Zone, [Bi-R]: Bi-directional Receive Zone, [Bi-T]: Bi-Directional Transmit Zone 10

Option 2 case (Uplink) • MSs use Access/Bi-directional receive Zone for transmission N frame

Option 2 case (Uplink) • MSs use Access/Bi-directional receive Zone for transmission N frame DL DL N+1 frame UL 16 m RS 2 UL L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T BS Legacy DL 16 m MS 16 m RS 3 16 m BS 16 m RS 1 16 m MS 2 16 m MS 3 DL UL UL BS L L L A RL RS 3 L L L A Bi-R L A Bi-T RS 2 L L L A Bi-T L A Bi-R RS 1 L L L A Bi-R L A Bi-T N+2 frame N+3 frame – 2 -hop: 2/1 -frame(10/4 -subframe) • • MS(Nth[A]: transmit) RS 3(Nth[A]: receive, N+1 th[Bi-T]: transmit) BS(N+1 th[RL]: receive) MS(Nth[Bi-R]: transmit) RS 3(Nth[Bi-R]: receive, Nth[Bi-T]: transmit) BS(Nth[RL]: receive) UL-Map decoding problem – 3 -hop: 2 -frame(10 -subframe) • MS(Nth[A]: transmit) RS 2(Nth[A]: receive, N+1 th[Bi-T]: transmit) RS 3(N+1 th[Bi-R]: receive, N+1 th[Bi-T]: transmit) BS(N+1 th[RL]: receive) – 4 -hop: 3/2 -frame(18/12 -subframe) • • MS(Nth[A]: transmit) RS 1(Nth[A]: receive, N+1 th[Bi-T]: transmit) RS 2(N+1 th[Bi-R]: receive, N+2 th[Bi-T]: transmit) RS 3(N+1 th[Bi-R]: receive, N+2 th[Bi-T]: 11 transmit) BS(N+2 th[RL]: receive) MS(Nth[Bi-R]: transmit) RS 1(Nth[Bi-R]: receive, Nth[Bi-T]: transmit) RS 2(Nth[Bi-R]: receive, N+1 th[Bi-T]:

Summary • DL/UL Latency based on Multi-hop Relay Frame Structures Option 1 Option 2

Summary • DL/UL Latency based on Multi-hop Relay Frame Structures Option 1 Option 2 – Latency comparison between Option 1 and # of hops Access/Relay/Access MS use access zone • Option 2 has smaller latency than Option 1. DL UL MS use Bi-D zone 2 2 -frame(8 -subframe) 2 -frame(10 -subframe) 2 -frame(8 -subframe) 1 -frame(4 -subframe) 3 3 -frame(17 -subframe) 2 -frame(8 -subframe) 4 4 -frame(24 -subframe) 4 -frame(26 -subframe) 3 -frame(16 -subframe) 2 -frame(12 -subframe) 2 2 -frame(10 -subframe) 3 3 -frame(17 -subframe) 2 -frame(10 -subframe) 4 4 -frame(26 -subframe) 3 -frame(18 -subframe) 12

References [1] IEEE C 802. 16 m-08_848 r 2, “IEEE 802. 16 m Relay

References [1] IEEE C 802. 16 m-08_848 r 2, “IEEE 802. 16 m Relay Ad Ho. C Group – Final Report”. [2] IEEE C 802. 16 m-08_003 r 4, “The Draft IEEE 802. 16 m System Description Document” [3] IEEE C 80216 m-08_1107, “Clarifications on Open Items of Option 2 in Relay Frame Structure” 13