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TS 04.22 (CT3)
Radio Link Protocol (RLP) for data and telematic services on the MS-BSS interface and the BSS-MSC interface

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(P) GSM Rel-98 v7.1.0    1999/06    65 p.
(P) GSM Rel-97 v6.2.0    1999/12    65 p.
(P) GSM Rel-96 v5.6.1    2000/07    65 p.
(P) GSM Phase-2 v4.5.1    1998/04    65 p.
(P) GSM Phase-1 v3.7.0    1992/02    65 p.

Rapporteur:  KLEHN, Norbert
Descendant(s):  TS 24.022    

This TS specifies the Radio Link Protocol (RLP) for data transmission over the GSM PLMN. RLP covers the Layer 2 functionality of the ISO OSI Reference Model (IS 7498). It is based on ideas contained in IS 3309, IS 4335 and IS 7809 (HDLC of ISO) as well as CCITT X.25 and Q.92x (LAP-B and LAP-D of CCITT, respectively.) RLP has been tailored to the special needs of digital radio transmission. RLP provides to its users the OSI Data Link Service (IS 8886).

RLP is intended for use with non-transparent data-transfer. Protocol conversion may be provided for a variety of protocol configurations. Those foreseen immediately are:
  • Character-mode protocols using start-stop transmission (IA5);
  • X.25 LAP-B.
For reasons of better presentation, material about protocol conversion has been placed within those Specifications concerned with the relevant Terminal Adaptors, i.e. TS 07.02 for the asynchronous case and TS 07.03 for the synchronous case. Care must be taken that that material also applies to Interworking Functions; see TS 09.04 - TS 09.07.


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1   Scope   PDF-p. 6
2   References
3   Introduction   PDF-p. 8
4   Frame structure   PDF-p. 9
5   Elements and procedure   PDF-p. 10
5.1   Modes      Up
5.2   Header and parameters   PDF-p. 11
5.3   Error Recovery   PDF-p. 17
5.4   Transitions between TCH/F9.6 and TCH/F14.4 channel codings
5.5   List of system parameters   PDF-p. 19
5.6   Support for discontinuous transmission (DTX)
6   Service definitions
A   RLP SDL Diagrams   PDF-p. 28
B   Change history   PDF-p. 64

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