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3GPP Specifications -- GSM-only (Rel-4 and later) -- 44 Series
Signalling Protocols - Stage 3 - User Equipment to Network

List elaborated from: http://www.3gpp.org/ftp/Specs/html-info/44-series.htm
Last update: July 6, 2010. Each line is a link to the TS (or TR) description, which points to the "3GPP specification detail" page that gives access to MS Word versions (as zip files, possibly including associated files) as well as pdf versions.
WG3GPP Releases
 TS 44.001 ct1 4567 89 MS-BSS interface - General aspects and principles
 TS 44.003 geran2 4567 89 MS-BSS interface - Channel Structures and Access Capabilities
 TS 44.004 geran2 4567 89 Layer 1 - General Requirements
 TS 44.005 geran2 4567 89 Data Link Layer General Aspects
 TS 44.006 geran2 4567 89 MS-BSS interface Data Link layer specification
 TS 44.012 geran2 4567 89 Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface
 TS 44.013 ct1 4567 89 Performance requirements on the mobile radio interface
 TS 44.014 geran2 4567 89 Individual equipment type requirements and interworking
 TS 44.018 geran2 4567 89 Radio Resource Control (RRC) protocol
 TS 44.021 ct3 4567 89 Rate adaption on the MS-BSS interface
 TS 44.031 geran2 4567 89A LCS - MS-SMLC Radio Resource LCS Protocol (RRLP)
 TS 44.035 geran2 4567 89 LCS - Broadcast network assistance for E-OTD and GPS positioning methods
 TS 44.056 ct1 4567 89 GSM - CTS radio interface layer 3 specification
 TS 44.057 ct1 4567 89 GSM - CTS supervising system layer 3 specification
 TS 44.060 geran2 4567 89A GPRS - MS-BSS interface - RLC/MAC protocol
 TS 44.064 ct1 4567 89 MS-SGSN - Logical Link Control (LLC) Layer Specification
 TS 44.065 ct1 4567 89 MS-SGSN - Subnetwork Dependent Convergence Protocol (SNDCP)
 TS 44.068 ct1 4567 89 Group Call Control (GCC) protocol
 TS 44.069 ct1 4567 89 Broadcast Call Control (BCC) protocol
 TS 44.071 geran2 4567 89 LCS - Mobile radio interface layer 3 LCS specification
 TS 44.118 geran2 567 89 Radio Resource Control (RRC) protocol - Iu mode
 TS 44.160 geran2 567 89 GPRS - MS-BSS interface - RLC/MAC protocol - Iu mode
 TS 44.318 geran2 67 89 Generic Access Network (GAN) - Mobile GAN interface layer 3 specification
 TR 44.901 geran2 567 89 External Network Assisted Cell Change (NACC)
GSM TS 44.001 ct1
Mobile Station - Base Station System (MS-BSS) interface - General aspects and principles
The present document describes the general aspects and principles relating to the Technical Specifications for the GSM MS-BSS interface.
-  V4.1  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Niels Peter Skov Andersen
GSM antecedent(s): TS 04.01
GSM TS 44.003 geran2
Mobile Station - Base Station System (MS-BSS) Interface Channel Structures and Access Capabilities
The present document defines limited sets of channel types, access capabilities and channel configurations at reference point Um (radio interface).
-  V4.0  V5.0  V6.1  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Niels Peter Skov Andersen
GSM antecedent(s): TS 04.03
GSM TS 44.004 geran2
Layer 1 - General Requirements
The present document defines the service offered by the physical layer (TS 45 series of Technical Specifications) of the MS BS interface (TS 45 and 44 series of Technical Specifications). Its main objective is to be a guidance for the interface between the 3GPP Technical Specifications in the 45 series and the 44 series. It also specifies the format of signalling channels and the order of bit transmission.

As far as possible, the present document makes use of the layering principles of the Reference Model for Open System Interconnection (OSI) as contained in ITU-T Recommendations X.200 and X.210.
-  V4.2  V5.3  V6.1  V7.1  V8.0  V9.0  -  -  -
List  Index Rapporteur: Ken Isaacs
GSM antecedent(s): TS 04.04
GSM TS 44.005 geran2
Data Link (DL) Layer General Aspects
The present document describes in general terms the Link Access Procedures on the Dm channel, LAPDm. The application of this protocol to other channel types is for further study. Details are provided in TS 44.006.

The purpose of LAPDm is to convey information between layer 3 entities across the GSM PLMN radio interface (MS to network interface) using the Dm channel.

NOTE: The term Dm channel is used for convenience to designate the collection of all the various signalling channels required in the GSM system. See also TS 44.003.
-  V4.0  V5.0  V6.1  V7.2  V8.1  V9.0  -  -  -
List  Index Rapporteur: Niels Peter Skov Andersen
GSM antecedent(s): TS 04.05
GSM TS 44.006 geran2
Mobile Station - Base Stations System (MS-BSS) interface Data Link (DL) layer specification
The present document defines a data link layer protocol to be used for signalling, and possibly also for other applications, on the MS BS interface.
-  V4.3  V5.2  V6.8  V7.2  V8.0  V9.1  -  -  -
List  Index Rapporteur: Niels Peter Skov Andersen
GSM antecedent(s): TS 04.06
GSM TS 44.012 geran2
Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface
SMSCB is a service in which short messages may be broadcast from a PLMN to Mobile Stations (MS)s. SMSCB messages come from different sources (e.g. traffic reports, weather reports). The source and subject of the SMSCB message is identified by a message identifier in the SMSCB message header. A sequence number in the SMSCB message header enables the MS to determine when a new message from a given source is available.

SMSCB messages are not acknowledged by the MS. Reception of SMSCB messages by the MS is only possible in idle mode. The geographical area over which each SMSCB message is transmitted is selected by the PLMN operator, by agreement with the provider of the information.

A SMSCB message is an end-to-end message that is formatted by/for the SMSCB application, and which is intended for customer viewing. Its format is described in detail in 3GPP TS 23.041. A CB message is any message sent on the basic or extended CBCH (see TS 45.002). It can be an occurrence of a SMSCB message, or a schedule message.

The SMS Cell Broadcast service is designed to minimize the battery usage requirements for a MS. A MS can read the first part of a CB message and then decide whether or not to read the rest of the message. In addition, the network may broadcast Schedule Messages, providing information in advance about the CB messages that will be sent immediately afterwards. The MS may use this scheduling information to restrict reception to those messages the customer is interested in receiving. This SMSCB DRX feature is optional in the network and the MS.
-  V4.0  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Niels Peter Skov Andersen
GSM antecedent(s): TS 04.12
GSM TS 44.013 ct1
Performance requirements on the mobile radio interface
The present document specifies measurable performance requirements for signalling aspects of Mobile Stations (MS)s. To allow implementation flexibility it has been chosen to specify requirements on the whole Mobile Station rather than to specify requirements on each "OSI layer". As a consequence the performance requirements do not fit conveniently in specifications such as 3GPP TS 24.008 and TS 44.018 (layer 3 only) or TS 44.006 (layer 2 only).

The main aim of the present document is to provide the justification for testing of requirements that are not included in other GSM specifications. Where specific requirements are included in other GSM specifications they are not duplicated here.

MSs have to perform a wide variety of functions. As a consequence most performance measurements have to be made under a set of defined conditions: where necessary, these are included in the present document.

Where necessary certain assumptions are made about the interaction times between the mobile equipment and the SIM. If the (test) SIM does not respond within the assumed time then appropriate allowances shall be made.

Additionally, it is intended that the present document should contain sufficient requirements to enable some undefined network timers in 3GPP TS 24.008 and TS 44.018 to be calculated.
-  V4.1  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Peter Dawes
GSM antecedent(s): TS 04.13
GSM TS 44.014 geran2
Individual equipment type requirements and interworking; Special conformance testing functions
The present document specifies for Mobile Stations (MS), for the digital cellular communications system and Personal Communication Systems (PCS) operating in the 900 MHz and 1800 MHz band (GSM900 and DCS1800), standardized by 3rd Generation Partnership Project (3GPP), those ME functions which are required for conformance testing purposes only. However, except for the Electrical Man Machine Interface (EMMI) and the Multi-slot TCH Loops, they are required for every mobile station.

For conformance tests, functions are activated via the radio interface, test SIM or dedicated pins. These functions must be capable of being activated when a test SIM is present but must not function with any other (e.g. network) SIM present except where otherwise stated within the present document. In this state, the MS must be able to perform all functions specified in the present document; in addition however, the special conformance testing functions must be operational.

The special conformance testing functions of the ME are enabled by use of a dedicated Subscriber Identity Module (test SIM, see TS 51.010-1 Annex 4). SIM, in general, is described in TS 51.011. The ME recognizes the test SIM by the Administrative Data Field.

The present document applies to the public land mobile radio service in the GSM900 and DCS1800 systems, using constant envelope modulation and operating on radio frequencies in the 900 and 1800 MHz bands respectively with a channel separation of 200 kHz and carrying 8 full rate channels or 16 half rate channels per carrier according to the TDMA principle.

The present document is part of the 3GPP TS series of technical specifications. The present document neither replaces any of the other GSM technical specifications or GSM related TS, nor is it created to provide full understanding of (or parts of) the GSM900 and DCS1800 systems.

The present document applies to the unit which includes the hardware to establish a connection across the radio interface.
-  V4.4  V5.3  V6.4  V7.3  V8.1  V9.0  -  -  -
List  Index Rapporteur: Andrew Howell
GSM antecedent(s): TS 04.14
GSM TS 44.018 geran2
Mobile radio interface layer 3 specification - Radio Resource Control (RRC) protocol
The present document specifies the procedures used at the radio interface (Reference Point Um, see 3GPP TS 24.002) for Radio Resource (RR) management.

Notation "Reserved sub-clause number" is used to indicate which sub-clauses of the specification were moved from this part of the standard to the other part when this standard was split between RAN and CN parts.

When the notations for "further study" or "FS" or "FFS" are present in this specification they mean that the indicated text is not a normative portion of this standard.

These procedures are defined in terms of messages exchanged over the control channels of the radio interface. The control channels are described in TS 44.003.

The structured functions and procedures of this protocol and the relationship with other layers and entities are described in general terms in 3GPP TS 24.007.
-  V4.23  V5.23  V6.24  V7.19  V8.11  V9.5  -  -  -
List  Index Rapporteur: Andrew Howell
GSM antecedent(s): TS 04.18
GSM descendant(s): TS 44.118
GSM TS 44.021 ct3
Rate adaption on the Mobile Station - Base Station System (MS-BSS) interface
The present document defines the rate adaptation functions to be used in PLMN Mobile Stations (MS)s for adapting terminal interface data rates to the Mobile Station - Base Station System (MS-BSS) interface data rates in accordance with TS 43.010.

The provision of these functions will depend on the services a particular station is designed to support.

NOTE 1: The present document should be considered together with TS 48.020 (Rate Adaptation on the BSS-MSC Interface) to give a complete description of PLMN rate adaptation.

NOTE 2: The Gb interface does not play any role in the scope of the present document although the term "A/Gb mode" is used.
-  V4.1  V5.2  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Juha Rasanen
GSM antecedent(s): TS 04.21
GSM TS 44.031 geran2
Location Services (LCS) - Mobile Station (MS) - Serving Mobile Location Centre (SMLC) Radio Resource LCS Protocol (RRLP)
The present document contains the definition of the Radio Resource LCS Protocol (RRLP) to be used between the Mobile Station (MS) and the Serving Mobile Location Centre (SMLC).

Clause 2 defines the functionality of the protocol. Clause 3 describes the message structure, and Clause 4 the structure of components. Clause 5 contains the ASN.1 description of the components.
-  V4.14  V5.14  V6.9  V7.13  V8.6  V9.2  V10.0  -  -
List  Index Rapporteur: Milan Patel
GSM antecedent(s): TS 04.31
GSM TS 44.035 geran2
Location Services (LCS) - Broadcast network assistance for Enhanced Observed Time Difference (E-OTD) and Global Positioning System (GPS) positioning methods
The present document contains the content of messages necessary for support of MS Based location service operation on the mobile radio interface layer 3.
-  V4.1  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Milan Patel
GSM antecedent(s): TS 04.35
GSM TS 44.056 ct1
GSM Cordless Telephony System (CTS), Phase 1 - CTS radio interface layer 3 specification
The present document specifies the procedures used at the CTS radio interface (Reference Point Um*, see TS 03.56) for Call Control (CC), Mobility Management (MM), Radio Resource (RR).

When the notations for "further study" or "FS" or "FFS" are present in the present document they mean that the indicated text is not a normative portion of the present document.

These procedures are defined in terms of messages exchanged over the control channels of the radio interface. The CTS control channels are described in TS 03.52.

The structured functions and procedures of this protocol and the relationship with other layers and entities are described in general terms in TS 04.07.
-  V4.0  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Keith Drage
GSM antecedent(s): TS 04.56
see also: TS 42.056, TS 43.052, TS 44.057, TS 45.056
GSM TS 44.057 ct1
GSM Cordless Telephony System (CTS), Phase 1 - CTS supervising system layer 3 specification
The present document specifies the procedures used at the CTS system interface with the supervision part i.e. the interface between the CTS-FP and the CTS-SN.

Only CTS regular supervising procedures are described; FMC management is not intended to be standardised.

The present document does not specify the transmission layer but only the layer 3.

When the notations for "further study" or "FS" or "FFS" are present in the present document they mean that the indicated text is not a normative portion of the present document.

The structured functions and procedures of this protocol and the relationship with other layers and entities are described in general terms in TS 04.07.
-  V4.0  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Keith Drage
GSM antecedent(s): TS 04.57
see also: TS 42.056, TS 43.052, TS 44.056, TS 45.056
GSM TS 44.060 geran2
Mobile Station - Base Station System (MS - BSS) Interface Channel Structures and Access Capabilities
This document specifies procedures for the following layers of the radio interface (Um reference point), the interface between the GSM/EDGE Radio Access Network (GERAN) and the Mobile Station (MS):
- Radio Link Control (RLC).
- Medium Access Control (MAC), including Physical Link Control functions.

The procedures apply in A/Gb mode and may also apply in Iu mode (see TS 44.160).
-  V4.23  V5.21  V6.28  V7.21  V8.9  V9.4  V10.1  -  -
List  Index Rapporteur: Andrew Howell
GSM antecedent(s): TS 04.60
GSM descendant(s): TS 44.160
GSM TS 44.064 ct1
Mobile Station - Serving GPRS Support Node (MS-SGSN); Logical Link Control (LLC) Layer Specification
The present document defines the Logical Link Control (LLC) layer protocol to be used for packet data transfer between the Mobile Station (MS) and Serving GPRS Support Node (SGSN).

It defines the frame structure, elements of procedure, format of fields, and procedures for the proper operation of the logical link control layer. It is based on ideas contained in IS-130, ISO 3309, ISO 4335, and ISO 7809 (HDLC of ISO), as well ITU-T Q.920 and Q.921 (LAPD). The concepts, the overview description of LLC layer functions and procedures, and the relationship with other Technical Specifications are described in general terms in 3GPP TS 23.060.

LLC spans from the Mobile Station (MS) to the Serving GPRS Support Node (SGSN). LLC is intended for use with both acknowledged and unacknowledged data transfer.

The frame formats defined for LLC are based on those defined for LAPD and RLP. However, there are important differences between LLC and other protocols, in particular with regard to frame delimitation methods and transparency mechanisms. These differences are necessary for independence from the radio path.

The LLC procedures are modelled upon the concepts of HDLC as outlined in ISO 4335. Data sequence integrity between the data source and data sink is effected by means of a cyclic numbering scheme. An independent numbering scheme is used for each logical data link, as identified by the a data link connection identifier. LLC supports two modes of operation:
- Unacknowledged peer-to-peer operation:
  A logical link entity may initiate transmissions to a peer entity without prior establishment of a logical connection with the peer entity. LLC does not guarantee in-order delivery. LLC can detect errors in a received frame, and, depending on whether the frame is sent in protected mode or not, either discard or deliver the erroneous frame. No error recovery procedures are defined at the LLC layer. Higher-layer protocols can be used to provide reliability, if needed. This mode of operation is known as Asynchronous Disconnected Mode (ADM).
- Acknowledged peer-to-peer operation:
  A balanced data link involves two participating entities, and each entity assumes responsibility for the organisation of its data flow and for error recovery procedures associated with the transmissions that it originates. Each entity operates as both a data source and data sink in a balanced link, allowing information to flow in both directions. This mode of operation is known as Asynchronous Balanced Mode (ABM), and provides a reliable service with in-order delivery.
-  V4.3  V5.1  V6.2  V7.3  V8.0  V9.0  -  -  -
List  Index Rapporteur: Scott Droste
GSM antecedent(s): TS 04.64
GSM TS 44.065 ct1
Mobile Station (MS) - Serving GPRS Support Node (SGSN); Subnetwork Dependent Convergence Protocol (SNDCP)
The present document 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.
-  V4.3  V5.2  V6.6  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Scott Droste
GSM antecedent(s): TS 04.65
GSM TS 44.068 ct1
Group Call Control (GCC) protocol
The present document specifies the Group Call Control (GCC) protocol used by the Voice Group Call Service (VGCS) on the radio interface.
-  V4.3  V5.0  V6.0  V7.2  V8.0  V9.0  -  -  -
List  Index Rapporteur: Milan Patel
GSM antecedent(s): TS 04.68
see also: TS 42.068, TS 43.068
GSM TS 44.069 ct1
Broadcast Call Control (BCC) protocol
The present document specifies the Broadcast Call Control (BCC) protocol used by the Voice Broadcast Call Service (VBCS) on the radio interface.
-  V4.3  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Milan Patel
GSM antecedent(s): TS 04.69
GSM TS 44.071 geran2
Location Services (LCS) - Mobile radio interface layer 3 LCS specification
The present document contains the coding of information necessary for support of location service operation on the mobile radio interface layer 3 between the LMU and SMLC.

Clause 4 defines generic procedures for the control of location services. In clause 5 location service support procedures are defined. Clause 6 gives the functional definitions and contents of messages for location service operations. Clause 7 gives the general format and coding for messages used for location service and the format and coding of information elements used for location service operations. Clause 6 gives the detailed message format and information elements coding between the LMU and SMLC.

Clause 8 gives the specification of the LMU LCS Protocol (LLP) operations. In clause 9 LMU - SMLC messages, data types and identifiers are given.

This version does not support segmentation of messages.
-  V4.3  V5.0  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Niels Peter Skov Andersen
GSM antecedent(s): TS 04.71
GSM TS 44.118 geran2
Mobile radio interface layer 3 specification, Radio Resource Control (RRC) protocol; Iu mode
The present document specifies the procedures used at the radio interface (Reference Point Um, see 3GPP TS 24.002) for Radio Resource management. The Radio Resource Control Protocol (RRC) is specified. RRC is the Radio Resource control plane protocol for Radio Resource management that is used when a mobile station is operating in Iu mode.

Notation "Reserved sub-clause number" is used to indicate which sub-clauses of the specification were moved from this part of the standard to the other part when this standard was split between RAN and CN parts.

When the notations for "further study" or "FS" or "FFS" are present in this specification they mean that the indicated text is not a normative portion of this standard.

These procedures are defined in terms of messages exchanged over the control channels of the radio interface. The control channels are described in TS 44.003.

The structured functions and procedures of this protocol and the relationship with other layers and entities are described in general terms in 3GPP TS 24.007.
-  -  V5.11  V6.4  V7.2  V8.0  V9.0  -  -  -
List  Index Rapporteur: Iuliana Marinescu
GSM antecedent(s): TS 44.018
GSM TS 44.160 geran2
General Packet Radio Service (GPRS) - Mobile Station (MS) - Base Station System (BSS) interface - Radio Link Control/ Medium Access Control (RLC/MAC) protocol for Iu mode
The present document specifies procedures for the following layers of the radio interface (Um reference point), the interface between the GSM/EDGE Radio Access Network (GERAN) and the Mobile Station (MS) in GERAN Iu mode:
- Radio Link Control (RLC).
- Medium Access Control (MAC), including Physical Link Control functions.
-  -  V5.8  V6.5  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: -
GSM antecedent(s): TS 44.060
GSM TS 44.318 geran2
Generic Access Network (GAN) - Mobile GAN interface layer 3 specification
The present document describes the procedures used over the Generic Access Network (GAN) interface (i.e., the List interface). The procedures are defined in terms of messages exchanged over the List interface.
-  -  -  V6.14  V7.9  V8.7  V9.2  -  -  -
List  Index Rapporteur: Jari Vikberg
see also: TS 43.318, TR 43.901 TR 43.902
GSM TR 44.901 geran2
External Network Assisted Cell Change (NACC)
This Technical Report provides background information, motivations, concepts and requirements regarding an extended Network Assisted Cell Change (NACC) feature for external cell change support. Cell change between GERAN and UTRAN cells is outside the scope of this report, although consideration has been taken in order to allow an easier extensibility to that case. The extension is based on the Release 4 version of the NACC feature where the mobile station is only supported by the NACC when performing internal cell re-selection, i.e. within a BSC. The extension of the feature is for GERAN just affecting BSS and for the core network the SGSN and signalling links between these network nodes. To support cell changes between GERAN and UTRAN, also the Um and the Uu interfaces are affected.

The evolved Release 4 NACC proposal as described in this TR provides the basis for the detailed Stage 2 and stage 3 specification work. The feature will be developed in a phased approach and a longer-term vision is presented in the report.

The focus of the TR is to:
- Define the requirements on different nodes
- Specify the requirements for the interfaces
- Propose a plan for the work item project
- Evaluation of what does and does not need to be standardised
-  -  V5.1  V6.0  V7.0  V8.0  V9.0  -  -  -
List  Index Rapporteur: Ingemar Backlund
  
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