Table of Contents

Intellectual Property Rights
Foreword
Foreword
1 Scope
2 References
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 General
5 Service primitives and functions
  5.1 Service primitives
      5.1.1 SNDCP service primitives
            5.1.1.1 SN-DATA.request
            5.1.1.2 SN-DATA.indication
            5.1.1.3 SN-UNITDATA.request
            5.1.1.4 SN-UNITDATA.indication
            5.1.1.5 SN-XID.request
            5.1.1.6 SN-XID.indication
            5.1.1.7 SN-XID.response
            5.1.1.8 SN-XID.confirm
      5.1.2 Service primitives used by SNDCP layer
            5.1.2.1 LL-RESET.indication
            5.1.2.2 LL-ESTABLISH.request
            5.1.2.3 LL-ESTABLISH.indication
            5.1.2.4 LL-ESTABLISH.response
            5.1.2.5 LL-ESTABLISH.confirm
            5.1.2.6 LL-RELEASE.request
            5.1.2.7 LL-RELEASE.indication
            5.1.2.8 LL-RELEASE.confirm
            5.1.2.9 LL-XID.request
            5.1.2.10 LL-XID.indication
            5.1.2.11 LL-XID.response
            5.1.2.12 LL-XID.confirm
            5.1.2.13 LL-DATA.request
            5.1.2.14 LL-DATA.indication
            5.1.2.15 LL-DATA.confirm
            5.1.2.16 LL-UNITDATA.request
            5.1.2.17 LL-UNITDATA.indication
            5.1.2.18 LL-STATUS.indication
            5.1.2.19 SNSM-ACTIVATE.indication
            5.1.2.20 SNSM-ACTIVATE.response
            5.1.2.21 SNSM-DEACTIVATE.indication
            5.1.2.22 SNSM-DEACTIVATE.response
            5.1.2.23 SNSM-MODIFY.indication
            5.1.2.24 SNSM-MODIFY.response
            5.1.2.25 SNSM-STATUS.request
            5.1.2.26 SNSM-SEQUENCE.indication
            5.1.2.27 SNSM-SEQUENCE.response
            5.1.2.28 SNSM-STOP-ASSIGN.indication
  5.2 Service functions
6 Protocol functions
  6.1 Multiplexing of N-PDUs
  6.2 Establishment and release of acknowledged peer-to-peer
      LLC operation
      6.2.1 Establishment of acknowledged peer-to-peer LLC
            operation
            6.2.1.1 Establishment criteria
            6.2.1.2 Re-establishment of the acknowledged
                    peer-to-peer LLC operation
            6.2.1.3 Establishment procedure
            6.2.1.4 Exceptional situations
      6.2.2 Release of acknowledged peer-to-peer LLC operation
            6.2.2.1 Release criteria
            6.2.2.2 Release procedure
            6.2.2.3 Release initiated by the LLC layer
  6.3 N-PDU buffering
  6.4 Management of delivery sequence
  6.5 Protocol control information compression
      6.5.1 Negotiation of multiple protocol control information
            compression types
            6.5.1.1 Format of the protocol control information
                    compression field
                    6.5.1.1.1 Spare bit (X)
                    6.5.1.1.2 Propose bit (P)
                    6.5.1.1.3 Entity number
                    6.5.1.1.4 Algorithm type
                    6.5.1.1.5 PCOMP
            6.5.1.2 Resetting compression entities following
                    SNDCP XID negotiation
            6.5.1.3 Parameters for compression entities
      6.5.2 TCP/IP header compression (RFC1144)
            6.5.2.1 Parameters
                    6.5.2.1.1 Applicable NSAPIs
                    6.5.2.1.2 S[0]
            6.5.2.2 Assignment of PCOMP values
            6.5.2.3 Error Recovery
      6.5.3 TCP/IP and UDP/IP header compression (RFC 2507)
            6.5.3.1 Parameters
                    6.5.3.1.1 Applicable NSAPIs
            6.5.3.2 Assignment of PCOMP values for RFC2507
            6.5.3.3 Error Recovery
  6.6 Data compression
      6.6.1 Negotiation of multiple data compression types
            6.6.1.1 Format of the data compression field
                    6.6.1.1.1 Spare bit (X)
                    6.6.1.1.2 Propose bit (P)
                    6.6.1.1.3 Entity number
                    6.6.1.1.4 Algorithm type
                    6.6.1.1.5 DCOMP
            6.6.1.2 Resetting compression entities following
                    SNDCP XID negotiation
            6.6.1.3 Parameters for compression entities
      6.6.2 Management of V.42 bis data compression
            6.6.2.1 Parameters
                    6.6.2.1.1 Applicable NSAPIs
                    6.6.2.1.2 P[0]
                    6.6.2.1.3 P[1]
                    6.6.2.1.4 P[2]
            6.6.2.2 Assignment of DCOMP values
            6.6.2.3 Operation of V.42 bis data compression
  6.7 Segmentation and reassembly
      6.7.1 General
            6.7.1.1 Segmentation
            6.7.1.2 Reassembly
      6.7.2 Segmentation and reassembly in acknowledged mode
      6.7.3 Segmentation and reassembly in unacknowledged mode
      6.7.4 Exception situations
            6.7.4.1 Receive First Segment state
            6.7.4.2 Receive Subsequent Segment state
            6.7.4.3 Discard state
  6.8 XID parameter negotiation
      6.8.1 Negotiation of compression entities
      6.8.2 Values of SNDCP XID parameters
      6.8.3 Exception handling
  6.9 Data transfer
      6.9.1 Acknowledged mode
      6.9.2 Unacknowledged mode
  6.10 Possible combinations of SNDCP protocol functions and
       their connection to service access points
7 Definition of SN-PDU
  7.1 Format convention
      7.1.1 Numbering convention
      7.1.2 Order of transmission
      7.1.3 Field mapping convention
  7.2 SN-PDU Formats
8 SNDCP XID parameters
Annex A (informative): Change Request History
History

Abstract

Gives 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). 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.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	3GPP CN