• Anchor PC: For each idle mode MS, there is a single anchor PC that contains the updated location information of the MS.
• Relay PC: There are one or more other PCs in the network, called relay PCs, that participate in relaying paging and location management messages between the paging agent and the anchor PC.
If paging action is authorized, Anchor PC retrieves the MS paging information and constructs Paging_Announce message. The Anchor PC issues one or more Paging_Announce messages based on its knowledge of the Paging Region topology as shown in sections XXXXX.The Anchor PC starts a timer TR4_Paging_Announce when it sends out the first Paging_Announce message and waits for the paging response. The Anchor PC sets a paging re-transmission counter N. If the Anchor PC does not receive a paging response, it retransmits the Paging_Announce message prior to the expiration of the timer TR4_Paging_Announce.If the Anchor PC is topologically aware of the defined Paging Group (PG), including the last BS from which the MS performed location update, the Anchor PC directly issues Paging_Announce messages to all or some subset of the Paging Group members. The members consist of BSs and/or relay PCs in the region.If the Anchor PC is topologically unaware of the Paging region or the BSs defined in the Paging group, the Paging_Announce messages are sent to the known Relay PC(s). The Relay PC(s) forwards the announce message to one or more BSs in the Paging region.
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