This TS specifies or references the subset of MTP and SCCP which is used for the reliable transport of BSSAP+ messages in the Gs
Clause 5 of the present document deals with the subset of the MTP that is required between an SGSN and a VLR. It is intended that this implementation of MTP is compatible with a full MTP implementation. Clause 4 references the
which specifies alternatives to the MTP.
The SCCP is used to provide message routing between the SGSN and the VLR. The SCCP routing principles specified
in the present document allow to connect one SGSN to several VLR. No segmentation at SCCP level is needed on the
interface. Only SCCP class 0 is used on the Gs interface. Clauses 6 and 7 identify the SCCP subset that should be used between an SGSN and an VLR.