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Reply To: Contention resolution in case of CS call


Hi Girish,

after the access on CCCH and moved to the dedicated channel, the first message sent by the mobile is a SABM with:
– Location Update Request
– CM Service Request

In both cases the mobile identity is present there.
This message is sent back by UA and received by the mobile.

If a second mobile was involved in that access, at that point it can stop and move away.

You can find details here:
3GPP 44.018, par. 3.1.5