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ETSI TS 144 065
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ETSI TS 144 065 Digital cellular telecommunications system (Phase 2+); Mobile Station (MS) - Serving GPRS Support Node (SGSN); Subnetwork Dependent Convergence Protocol (SNDCP) (3GPP TS 44.065 version 13.1.1 Release 13)
standard by European Telecommunications Standards Institute, 02/01/2017
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Full Description
ETSI TS 144 065 provides the description of the Subnetwork Dependent Convergence Protocol (SNDCP) for the General Packet Radio Service (GPRS).The user of the services provided by SNDCP is a packet data protocol (PDP) at the mobile Station (MS) or the Relay at the Serving GPRS Support Node (SGSN). Additionally, a control entity, e.g. AT command interpreter, may be an SNDCP user. SNDCP uses the services provided by the Logical Link Control (LLC) layer [4] and the Session Management (SM) sub-layer [2].
The main functions of SNDCP are:Multiplexing of several PDPs.Compression / decompression of user data.Compression / decompression of protocol control information.Segmentation of a network protocol data unit (N-PDU) into Logical Link Control Protocol Data Units (LL-PDUs) and re-assembly of LL-PDUs into an N-PDU.3GPP TS 44.065 is applicable to GPRS MS and SGSN.