Location update for MBS in Idle State
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C802.16m-08/904
Date Submitted:
2008-09-05
Source:
Kanchei (Ken) Loa, Chiu-Wen Chen, Chun-Yen Hsu, Yi-Hsueh Tsai,
Yung-Ting Lee, Youn-Tai Lee, Hua-Chiang Yin
Institute for Information Industry
E-mail: loa@iii.org.tw
Whai-En Chen
National Ilan University
Shiann-Tsong Sheu, Chih-Cheng Yang
National Central University
Yang-Han Lee, Yih Guang Jan
Tamkang University
Venue:
IEEE 802.16 Interim, Session #57, Kobe, Japan
MAC aspects of enhanced MBS; in response to the TGm Call for Contributions and Comments 802.16m-08/033 for Session 57
Base Contribution:
N/A
Purpose:
For discussion and approval by IEEE 802.16 TGm
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Introduction (1/2)
• MBS zone is a group of base stations transmitting the
same MBS data simultaneously
• MBS data streams are not dedicated to the specific MS
– An MS that receives feedback-free MBS data could enter the
idle mode while periodically receiving MBS data streams.
• For example, broadcast TV is one of the feedback-free
MBS applications
Introduction (2/2)
• For an MS that receives only feedback-free MBS data
streams, and migrates to a BS in another MBS zone:
– In 16e, the MS is expected to register to that BS and to
acquire a new CID and SA for reception of MBS data
– In 16m, we propose the MS may perform MBS location
update and receive the MBS data in idle state
• MBS location update is to notify the MBS controller to send the
information of neighbor MBS zone to the MS for seamless MBS
zone transition.
• The MBS location update information is piggyback in the location
update messages
MBS zone 1
MS
MBS zone 2
Comparisons
Legacy Inter-MBS zone
transition
MBS location update
Network entry
Yes
No
Handover
Yes
No
MS re-enter idle state
Yes
No
Location update
No
Yes
Procedures
MBS location update with MBS controller
• MS monitors the MBS zone ID (such as that included in DCD
in the Reference System) and initiates the MBS location
update process (RNG-REQ message is used in the Reference
System) if MBS zone transition is required
• The MS receives the neighbor MBS zone information in MBS
location update response message (RNG-RSP message is used
in the Reference System)
MS
BS in current
MBS zone
MBS Location update
(RNG-REQ)
MBS controller of
current MBS zone
MBS controller of
neighbor MBS zone
MBS zone change request
MBS zone information exchange
Target MBS zone information acquisition
MBS location update
reply (RNG-RSP)
Proposed Text in SDD
• [Insert the following text in the 802.16m-08/003r4:]
• 15.x MBS Location update
For an MS that is receiving the feedback-free MBS data
only, when the MS migrates to a BS in another MBS zone,
the MS may perform the MBS location update process by
piggybacking the MBS information in the location update
messages. The MS acquires the neighbor MBS zone
information for continuous reception of MBS data. The
MS stays in idle state while performing MBS location
update.