3.6 RR Procedures in packet transfer mode

3GPP44.018GSM/EDGE Radio Resource Control (RRC) protocolMobile radio interface Layer 3 specificationRelease 16TS

3.6.1 RR Connection establishment using enhanced DTM CS establishment

The initiation of the procedure and the assignment of resources for the establishment of the RR connection are described in 3GPP TS 44.060.

In respect of the establishment of the RR connection, the mobile station shall act on the starting time information element, if present in an IMMEDIATE ASSIGNMENT message, as specified in sub-clause 3.3.1.1.3.1.

The establishment of the main signalling link is described in sub-clause 3.1.5. In the case of a network initiated establishment (i.e. not following the sending of a PACKET CS REQUEST message), the layer 2 SABM frame shall contain a PAGING RESPONSE message. Otherwise (i.e. the mobile station has sent a PACKET CS REQUEST message), an appropriate layer 3 service request message shall be sent in the layer 2 SABM frame.

The completion of the establishment of the RR connection is described in sub-clause 3.6.2.

3.6.2 Completion of RR Connection establishment

3.6.2.1 Connection established in response to an encapsulated IMMEDIATE ASSIGNMENT message

The RR connection establishment procedure is terminated on the network side when the main signalling link is established. Timer T3101 is stopped, the MM sublayer on the network side is informed that the RR entity has entered the dedicated mode and the network may release the old packet resources.

On the mobile station side, the procedure is terminated when the establishment of the main signalling link is confirmed. The MM sublayer is informed that the RR entity has entered the dedicated mode.

3.6.2.2 Connection established in response to an encapsulated DTM ASSIGNMENT COMMAND message

For the handling of the packet resources upon reception of the encapsulated DTM ASSIGNMENT COMMAND message the sub-clauses 3.4.23.2.2 and 3.4.23.2.3 are applicable.

The RR connection establishment procedure is terminated on the network side when the main signalling link is established. Timer T3107 is stopped, the MM sublayer on the network side is informed that the RR entity has entered the dual transfer mode, and the network may release the old packet resources.

On the mobile station side, the procedure is terminated when the establishment of the main signalling link is confirmed. The MM sublayer is informed that the RR entity has entered the dual transfer mode.