Routing area update?

[basith.aces]

Dear Members


Can anybody explain about ROUTING AREA UPDATE, when we'll gets this type of message in layer3 in tems


Thanks for your replies in advance

[wolverine]

As an operator you define geographic areas (collection of cells) that share the same Routing Area Code (RAC).

This RAC is broadcasted in the System Information messages.

When the UE/MS detects it has entered a new Routing Area (RA) it will perform a Routing Area Update (RAU) to inform the network (the SGSN essentially) that this has occurred.

The reason for all of this is to limit the PS paging to a specific area in case the SGSN needs to contact the UE/MS.

RAU will also be performed after the routing area update timer has expired at periodic intervals (again set by the operator).

[luonghp2003]

Dear Members


Can anybody explain about ROUTING AREA UPDATE, when we'll gets this type of message in layer3 in tems


Thanks for your replies in advance

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with my self.
in GSM, The Circuit Switch define a procedure" Location Update" an LAC
in GPRS/CDMA, The Packet Switch define a procedure "Routing Area Update" and RA