Clarification on Temporary identifier of idle AMS
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C802.16m-09/0839
Date Submitted:
2009-04-24
Source:
Dongyao Wang, Kaibin Zhang, Gang Shen, Shan Jin
Voice: 86-21-58541240-3712
Email: Dongyao.Wang@alcatel-sbell.com.cn
Alcatel-Lucent Shanghai Bell
388#, Ningqiao Road, Pudong Jinqiao
Shanghai, 201206, P.R. China
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Venue:
Re: IEEE 80216m-09_0021, Call for Comments on Project 802.16m System Description Document (SDD) . Section 10.
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N/A
Purpose:
To be discussed and adopted in the 802.16m SDD by TGm
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Background
 Idle mode provides efficient power saving for the AMS
 allowing the AMS to become periodically available for DL broadcast
traffic messaging
 no registration at ABS is required for AMS
 idle mode AMS is assigned to a paging group
 Temporary Identifier is defined for the idle state for the Privacy
 uniquely identify an AMS in the idle mode in a particular paging group
 assigned during idle mode entry
 updated when location update due to paging group change
 used in paging message to identify a AMS
 identify itself during network re-entry procedure
Enter idle state
Assigned Temporary
Identifier
Idle State
Problems
 One ABS may be a member of one or
more paging groups
 Therefore, the following case is possible
due to mobility
 The same preferred ABS for both AMS 1
and AMS 2
 AMS 1 and AMS2 belong to the different
paging group
 The same Temporary Identifier for both
AMS 1 and AMS 2
 Collisions occur when Temporary
Identifier is used
 in the paging message to identify a AMS, or
 in the network re-entry procedure
Maybe with the same
Temporary Identifier
Proposed Solution
 Multiple neighboring paging groups constitute a
paging cluster
 Each paging group assigned to a unique Paging
Group ID
 Two segments for the Temporary Identifier
 the first part is defined as the Paging Group ID
 the second part is defined as the unique ID in this
Paging group
 unique within the domain of a cluster of paging
groups
 collision-avoidance guaranteed by network
planning
PG ID
(1st part)
Unique ID
(2nd part)
Temporary Identifier
PG 1
PG 2
……
PG N
Cluster of paging groups
Proposed text changes to 16m SDD
[Change the section 10.5.2.2.1 “Idle mode initiation” of SDD]
10.5.2.2.1 Idle mode initiation
An MS or serving BS initiates idle mode using procedures defined in the wirelessMANOFDMA Reference system. In order to reduce signaling overhead and provide location
privacy, a temporary identifier is assigned to uniquely identify the AMSs in the idle
mode in a particular paging group within a cluster of paging groups. And the AMS’s
temporary identifier contains the PGID information of its paging group. The AMS’s
temporary identifier remains valid as long as AMS stays in the same paging group. The
temporary identifier assignment may happen during idle mode entry or during location
update due to paging group change. Temporary identifier may be used in paging
messages or during AMS’s network re-entry procedure.
Thanks