Proposal on Full L3 Relay

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Proposal on Full L3 Relay

Document Number: IEEE S802.16m-09_2443

Date Submitted: 2009-11-06

Source:

Yuqin Chen, Mary Chion, Yang Liu

E-mail: chen.yuqin@zte.com.cn

ZTE Corporation

Venue:

Base Contribution: C80216m-09_2443

Re : P802.16m/D2

Purpose:

Discussion and approval of the proposal into the IEEE P802.16m/D2

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.

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Introduction

• L2 Data/L3 Control

– [1] shows the performance comparison between L2

Relay and L2 Data/L3 Control Relay and proposes the scheme for L2 Data/L3 Control Relay;

• Analysis of Cons:

– STIDs for AMSs are insufficient because actually they belong to the scope of ABSs.

– Different processing for data plane and control plane, which causes ARS different from ABS;

– Some signaling messages (REG, DSX) for control are required to get to ABS;

• Full L3 Relay is proposed.

Current Scheme

• L2 Data/L3 Control

– Control Plane:

• R6 interface terminates on the RS;

• R6 messages can be carried over AAI_L2-XFER

MAC management messages between the RS and

BS.

– Downlink: BS performs classification, removes the higher layer headers, keeps the message contents intact and sends it using AAI_L2-XFER, addressed to the STID of the RS and with FID=1

– Uplink: RS sends the message using AAI_L2-XFER to the BS with FID=1.

Current Scheme

• L2 Data/L3 Control

– Data Plane:

• Downlink: GRE packet is de-tunneled by BS and the MS MAC PDUs are encapsulated into Relay

MAC Packet and transmitted to the RS ;

• Uplink: MS MAC PDUs are encapsulated into

Relay MAC PDU by the RS.

Proposed Scheme: Full L3 Relay

• Full L3 Control Protocol Stack

ARS IP Address

MAC

PHY

R6 Control

Message

UDP

IP

MAC

PHY

ARS

IP

MAC

PHY

ABS

IP

L2

L1

R6 Control

Message

UDP

IP

L2

L1

ASN- GW

Proposed Scheme: Full L3 Relay

• Full L3 Data Protocol Stack

ARS IP Address

MAC

PHY

GRE

IP

MAC

PHY

ARS

IP

MAC

PHY

ABS

IP

L2

L1

GRE

IP

L2

L1

ASN- GW

Packet Delivery Steps

Radio link bearer (relay

MAC PDU)

AMS1 ABS-ASN GW bearer

AMS 2/3

Radio interface

ARS

AMS2 GRE Packet

AMS3 GRE Packet

ABS

AMS2 GRE packet

AMS3 GRE packet

ASN GW

IP packet

AMS1 GRE tunnel

Radio interface

MS1 BS RS1

MS3

MS2

Appendix

Please refer C80216m-09_xxxx for text proposal.

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