3GPP43.055Dual Transfer Mode (DTM)Release 16Stage 2TS
For the purposes of the present document, the following terms and definitions apply:
Dual transfer mode: It is only applicable for a mobile station that supports GPRS. A mobile station in dual transfer mode has resources for an RR connection and is simultaneously allocated resources for one or more TBFs, provided that the BSS co-ordinates its allocation of radio resources. DTM is optional both for the mobile station and the network. A DTM mobile is a class A mobile. Hence all specifications/requirements for class A apply to this mobile unless specifically altered by the present document. The procedures specified for dedicated and packet transfer modes apply to a mobile station in dual transfer mode unless specifically altered by the present document.
Class A/class B: In the present document "class A" and "class B" is used as a short form of "class A mode of operation" and "class B mode of operation", respectively.
DTM Handover: DTM handover is introduced in order to support the parallel handover of circuit-switched and packet-switched domains of a mobile station in dual transfer mode or RRC connected mode, from a source cell to a target cell. The procedures specified for circuit-switched handover (see 3GPP TS 23.009 ) and packet-switched handover (see 3GPP TS 43.129 ) apply to DTM handover unless specifically altered by the present document.
Network sharing: network sharing is an optional feature that allows different core network operators to connect to the same shared radio access network (see 3GPP TS 23.251 ). When network sharing is in use within a given cell, the network broadcasts within system information the PLMN identities of the PLMNs sharing the cell. A mobile station supporting network sharing uses this information for its PLMN (re)selection processes and indicates the selected PLMN to the BSS. When GERAN specifications have statements referring to network sharing support/non-support, this refers to whether or not the MS supports GERAN network sharing and (unless specified otherwise) are not related to support of network sharing on other RATs.
For the purposes of the present document, the following abbreviations apply:
CS Circuit Switched
CN Core Network
DTM Dual Transfer Mode
PS Packet Switched
RAT Radio Access Technology