Document 17751062

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A Procedure to Setup HR-MS to HR-MS Direct Communication with Supporting from Infrastructure Stations

Document Number:

IEEE S802.16n-10/0007

Date Submitted:

14/03/2011

Source:

Haiguang Wang, Hoang Anh Tuan, Jaya Shankar,

Shoukang Zheng, Yeow Wai Leong, Joseph Teo Chee Ming,

Mar Choong Hock

Insittute for Infocomm Research (I2R)

1 Fusionopolis Way, #21-01, Connexis (South Tower)

Singapore 138632

Re:

*< http://standards.ieee.org/faqs/affiliationFAQ.html

>

Call for contributions for 802.16n AWD

Base Contribution:

IEEE C802.16n-11/0007

Purpose:

Voice:

E-mail:

+65 64082256 hwang@i2r.a-star.edu.sg

To discuss and adopt the proposed text in the 802.16n draft Text

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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Further information is located at < http://standards.ieee.org/board/pat/pat-material.html

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Abstract

• In this proposal, we proposed a procedure for

HR-networks in setting up HR-MS direct communication in HR-BS or HR-RS appears in the network.

System Requirement

Usage Scenarios

HR-

BS

HR-

MS

(a)

HR-

MS

HR-

BS

HR-

RS

HR-

MS

(b)

HR-

MS

Procedure to Setup Communications between

MSs under the Same HR-BS/HR-RS

Core

Network MS1 MS2 HR-BS/HR-RS

New flow from application layer

DSA_REQ

DSA_ACK

DATA

DSA_RSP

DATA

DATA DSA_REQ

DSA_RSP

DSA_ACK

DATA

State of the Arts

• Existing standards, including 802.16-2009,

802.16m, does not support MS to MS direct communication.

• Modifications to the procedure and signaling exchange are required to supporting the HR-

MS to HR-MS direct communication.

MS1

New flow from application layer

Proposed Modification

MS2 BS

DSA_REQ

DSA_REQ

Detect the feasibility Direct

Communication

DSA_RSP

DSA_ACK

DSA_RSP

RNG

DSA_ACK

RNG

DATA and ARQ

RNG

RNG

DATA and ARQ

Termination of direct communication

Termination of direct communication

Core

Network

Summary

• In this contribution, we provide a procedure for 802.16n HR-MS in setting up direct communication link with the help from infrastructure stations.

Proposed Text

• 17.3.2 Direct communication between HR-MSs

When HR-MS associate to an HR-BS/HR-RS and the functionalities of direct communication are turned on, HR-BS/HR-RS should check DSA_REQ messages received from HR-MS and determine whether HR-MS direct communication should be adopted for this follow. The HR-BS/HR-RS can use the destination IP address and the HR-MS neighboring table maintained at the HR-BS to determine whether a direct communication should be setup or not. If the HR-BS/HR-RS decides that a direct communication should be setup between the source and destination, then it should take following procedure to setup the direct communication link and perform data transmission.

1) The HR-BS/HR-RS should hold on the DSA_RSP to the source HR-MS.

2) The HR-BS/HR-RS should allocate flow_id and radio resource for the direct communication.

3) The HR-BS/HR-RS should transmit a DSA_REQ to the destination, which contains the flow_id and radio resource information for the direct communication.

Proposed Text: Continued

4) On receiving the DSA_REQ, the destination HR-MS should reply with

DSA_RSP.

5) The HR-BS/HR-RS should generate a DSA_ACK to the destination HR-MS on receiving the DSA_RSP. At the same time, the HR-BS/HR-RS should send the delayed DSA_RSP to source HR-MS, which contains the same flow_id and radio resource as sent to destination HR-MS.

6) On receiving the DSA_RSP, the source HR-MS should send a DSA_ACK to the

HR-BS/HR-RS.

7) After sending the DSA_ACK, the source and destination should start to synchronize process on the direct communication link using ranging signals. The HR-BS/HR-

RS may signal a specific ranging code to the source and destination HR-MS. The source HR-MS should send a ranging signal to the destination HR-MS first and the destination HR-MS should response with a ranging signal after receiving it.

8) Once the synchronization process is finished, the source HR-MS can transmit data on the direct communication link. The destination HR-MS may also transmit the

ARQ information on the direct communication link.

9) Synchronization on the direct communication link may be performed periodically.

The synchronization can be done similar as initial synchronization with a pair to ranging signals.

10) Once the direct communication should be ended, the source and destination HR-

MS should send signaling to the HR-BS/HR-RS to terminate the direct communication.

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