Cisco ASR 5000 series Product Overview page 224

▀ Introduction
Figure 66.
MS/SS
1
7
Table 47.
Step Description
1 The MS initiates a secure Location Update procedure by sending a RNG-REQ message to serving ASN BS, which includes
the Ranging Purpose Indication TLV set to indicate Idle Mode Location Update, the PC ID TLV which points to the anchor
ASN Gateway acting as the anchor PC function for the MS, and the HMAC/CMAC tuple.
2 The serving ASN BS sends an R6 LU_Req message to the serving ASN Gateway and starts timer TR6_LU_Req. The
message may include the PG ID, Paging Offset, and Paging Cycle TLVs if the serving ASN BS proposes an update to these
parameters.
3 The serving ASN Gateway (associated with the local Paging Controller) sends an R4 LU_Req message to the anchor PC
(associated with Anchor ASN Gateway) and starts timer TR6_LU_Req. The message may include the PG ID, Paging
Offset, and Paging Cycle TLVs if the serving ASN Gateway proposes an update to these parameters. Note: This message
may be relayed by several intermittent ASNs before reaching the anchor PC (Anchor ASN Gateway).
▄ Cisco ASR 5000 Series Product Overview
Location Update Flow
Serving ASN
ASN BS
2
6
9
Location Update Procedure Flow Description
ASN Paging Controller and Location Registry Overview
ASN-GW/
Local-PC
3
5
8
10
Anchor ASN
ASN-GW/PC/
Authenticator/DPF
4
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