Methods for air interface message transfer in fast call setup processes
AssigneeSpreadtrum Communications Corporation
InventorsBaikui Xu, Ling Lv, Tao Wu
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Abstract
A method of UU message transfer for fast call setup is disclosed. The method includes encapsulating a Service Request into a RRC Connection Request message. When a UE starts the service sensitive to call setup delays, the RRC Connection Request undergoes non-critical extension. The Service Request and necessary Access Stratum (AS) information are disposed into the extended portion. The RNC, after receiving the extended RRC connection request, extracts the IDT message from the extended RRC Connection Request and sends it to the CN.
Claims6
A method for fast call setup for an originating User Equipment and a receiving User Equipment, comprising:
- when the originating UE starts a service sensitive to call setup delays, NAS of the UE informs a RRC layer whether to start fast call setup procedure.
- If not, the RRC starts RRC connection request directly, transfers the Service Request to the CN via the air interface (UU) Initial Direct Transfer (IDT) message and interface uplink (IU) message after RRC connection is successful;
- otherwise, non-critically extending the RRC Connection Request message;
- disposing a NAS Service Request message and Access Stratum (AS) information into the extended portion;
- and
- RNC, after receiving the extended RRC Connection Request, encapsulates the Service Request of Non-Access Stratum into IU message, and sends IU message to CN.
Dependencies are inferred from the claim text.