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TS 44.065 (CT1)
Mobile Station (MS) - Serving GPRS Support Node (SGSN) –
Subnetwork Dependent Convergence Protocol (SNDCP)

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(P) V14.0.0    2017/03    54 p.
(P) V13.1.1    2016/09    53 p.
(P) V12.0.0    2014/09    53 p.
(P) V11.0.0    2012/09    53 p.
(P) V10.0.0    2011/03    53 p.
(P) V9.0.0    2009/12    53 p.
(P) V8.0.0    2008/12    53 p.
(P) V7.0.0    2006/10    53 p.
(P) V6.6.0    2006/06    53 p.
(P) V5.2.0    2004/09    50 p.
(P) V4.3.0    2004/09    50 p.
(P) GSM Rel-99 v8.2.0    2001/09    47 p.
(P) GSM Rel-98 v7.3.0    2000/03    45 p.
(P) GSM Rel-97 v6.7.0    2000/03    45 p.

Rapporteur:  Mr. Aghili, Behrouz
Antecedent:  TS 04.65    

This TS 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 and the Session Management (SM) sub-layer.

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.
This TS is applicable to GPRS MS and SGSN.


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1   Scope   PDF-p. 7
2   References
3   Definitions and abbreviations   PDF-p. 8
4   General
5   Service primitives and functions   PDF-p. 11

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