IEEE C802.16m-08/713

Project / IEEE 802.16 Broadband Wireless Access Working Group <
Title / Early UL Synchronization for 802.16mHandover Process
Date Submitted / 2008-7-7
Source(s) / Chun-YenWang, ITRI
Chun-YuanChiu, ITRI
Chie-Ming Chou, ITRI
Fang-Ching (Frank) Ren, ITRI
Richard Li, ITRI
Wern-Ho sheen, NCTU/ITRI / Voice:
E-mail:

Re: / IEEE 802.16m-08/024 - Call for Contributions on Project 802.16m System Description Document (SDD)
Topic:Upper MAC concepts and methods (mobility)
Abstract / Thiscontribution proposes anearly UL synchronization methodin order to further save the handover interruption time for 802.16m system.
Purpose / For discussion and approval by 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 <
Further information is located at < and <

Early UL Synchronization for 802.16m Handover Process

Chun-YenWang, Chun-Yuan Chiu, Chie-Ming Chou, Fang-Ching (Frank) Ren, Richard Li

ITRI

Wern-Ho sheen

ITRI/NCTU

1.Introduction

Fig. 1.The primitive handover procedure in IEEE 802.16e system

2.Proposed Early UL Synchronization Method

Fig. 2.Early UL Synchronization Procedure

3.Conclusions

In this document, we propose that aBS may reserve a few signatures for its neighbour BSs in advance. On one hand, these reserved signatures allow MSs performing non-contention based rangingprocess to avoid collision, and on the other hand the UE can send its CDMA ranging code to target BS and return to its serving BS immediately without waiting for the response from the target BS. Applying this mechanism into the mobility procedure, we find that the overall handover interruption time can be further reduced. Thus, we propose to capture the following proposed text into the IEEE 802.16m system description document (SDD) [2].

References

[1]IEEE 802.16m-07/002r4, “802.16m System Requirements”

[2]802.16m-08/003r3, “The Draft IEEE 802.16m System Description Document”

Proposed Text

The following text is proposed to be captured in the IEEE 802.16m system description document (SDD).

------Start of the proposed text------

[Insert the following text into this section]

10.x.xEarly UL Synchronization

Fig. X.Early UL Synchronization Procedure

------End of the text ------

1