Cisco ASR 5000 Series, Обзор продукта

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ASN Paging Controller and Location Registry Overview
Introduction ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Figure 65. ASN Paging Controller and Location Registry in WiMAX Networks
LR PC
PA4
PA5
PA7
Paging Group C
R6
LR PC
R6
R6
R6
R4
ASN GW
ASN GW
ASN 1
ASN 2
PA1
PA2
PA3
Paging Group B
Paging Group A
R6
R6
MS
In WiMAX networks, a mobile station is tracked when it is in idle mode. The information is stored to a location register
(LR). The tracking area is larger than the cell size because a paging group (PG) comprises multiple cells. When a
mobile station moves across paging groups, its location is updated via R6 and/or R4. The paging controller (PG) in
ASN-GW retrieves the location from the LR and alerts the paging agent in (PA) in the base station to signal to the
mobile station.
Location information for idle mode subscribers is maintained in a location register central database that is co-located on
an anchor paging controller. Idle mode can be initiated by the mobile device or the network. The paging controller
retains subscriber session context information in addition to supervising paging activities. It also represents an
authentication liaison between the user device and the AAA server. As the subscriber roams across cell sites, it is
associated with a group of base stations known as a paging group. Location updates to the LR database are conveyed
over R6 and R4 messages between the relay paging controller serving ASN and the A-PC/LR. When a remote host