3.4.24 RR procedures related to packet resource release while in dual transfer mode

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

The release of a TBF shall follow the procedures in 3GPP TS 44.060.

In the case of the release of the RR connection while in dual transfer mode, the mobile station may abandon the packet resources and, once in idle mode and packet idle mode, it may start a new establishment as described in 3GPP TS 44.060, or, if redirected to UTRAN according to the information element "Cell selection indicator after release of all TCH and SDCCH", as described in 3GPP TS 25.331, or, if redirected to E-UTRAN according to the information element "Cell selection indicator after release of all TCH and SDCCH", as described in 3GPP TS 36.331.

If the network redirects a mobile station towards E-UTRAN, it proceeds as follows:

– The network shall use the information element "Cell selection indicator after release of all TCH and SDCCH" in the channel release message for redirection towards an EARFCN in the E-UTRAN band numbered less than 65.

– The network shall use the information element "individual priorities" in the channel release message for redirection towards an EARFCN in the E-UTRAN band numbered greater than 64.

If the mobile station and the network support the enhanced DTM CS release procedure, the network may delay the release of the RR connection until the mobile station has received the needed system information, in order to maintain the radio resources on the PDCH(s)after the release of the RR connection.