Content for TS 44.004 Word version: 16.0.0
1 Scope Word‑p. 7
The present document defines the service offered by the physical layer (3GPP TS 45 series of Technical Specifications) of the MS BS interface (3GPP 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.
1a References
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 22.011: "Service accessibility".
[3]
TS 43.013: "Discontinuous Reception (DRX) in the GSM System".
[4]
TS 43.020: "Security-related network functions".
[5] Void.
[6] Void.
[7]
TS 44.003: "Mobile Station - Base Station System (MS - BSS) interface; Channel structures and access capabilities".
[8]
TS 44.005: "Data Link (DL) layer; General aspects".
[9]
TS 44.006: "Mobile Station - Base Station System (MS - BSS) interface; Data Link (DL) layer specification".
[10] Void.
[11]
TS 44.018: "Mobile radio interface layer 3 specification; Radio Resource Control Protocol".
[12] Void.
[13] Void.
[14]
TS 44.012: "Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface".
[15] Void.
[16] Void.
[17] Void.
[17a]
TS 44.060: "General Packet Radio Service (GPRS); Mobile Station (MS) - Base Station System (BSS) interface; Radio Link Control/Medium Access Control (RLC/MAC) protocol".
[18] Void.
[19] Void.
[20] Void.
[21] Void.
[22] Void.
[23] Void.
[24] Void.
[25] Void.
[26] Void.
[26a] Void.
[26b] Void.
[27]
TS 45.001: "Physical Layer on the Radio Path (General Description)".
[28]
TS 45.002: "Multiplexing and multiple access on the radio path".
[29]
TS 45.003: "Channel coding".
[30] Void.
[31]
TS 45.005: "Radio transmission and reception".
[32]
TS 45.008: "Radio subsystem link control".
[33]
TS 45.010: "Radio subsystem synchronization".
[34] Void.
[35]
ITU-T Recommendation X.200: "Information technology; Open Systems Interconnection; Basic Reference Model: The basic model".
[36]
ITU-T Recommendation X.210: "Information technology - Open systems interconnection - Basic Reference Model: Conventions for the definition of OSI services".
[37]
TS 48.058: "Base Station Controler - Base Transceiver Station (BCS-BTS) Interface Layer 3 Specification".
[38]
TR 45.902: "Flexible Layer One".
[39]
TS 43.064: "Overall description of the GPRS radio interface; Stage 2".
2 Interfaces to the physical layer Word‑p. 8
The physical layer (layer 1) is the lowest layer in the OSI Reference Model and it supports all functions required for the transmission of bit streams on the physical medium. These bit streams are transferred on traffic channels, packet data traffic channels and control channels as defined in TS 44.003.
The physical layer interfaces the Data Link Layer, the Radio Link Control and Medium Access Control layer and the supported functional units of the application (Figure 2).
(not reproduced yet)
Figure 2: Interfaces with the Physical Layer
2.1 Interface to the Data Link Layer Word‑p. 9
The physical layer interfaces the data link layer. On this interface control channels are supported. The data link layer is specified in TS 44.005 and TS 44.006. Communication between the Physical Layer and the Data Link Layer is in an abstract way performed by means of PH primitives. They do not constrain implementations.
The PH primitives exchanged between the physical layer and the data link layer are used for the transfer of layer 2 frames. They are also used to indicate the establishment of channels to layer 2.
2.1a Interface to the Radio Link Control and Medium Access Control layer
The physical layer interfaces the Radio Link Control and Medium Access Control (RLC/MAC) layer. On this interface packet data control channels and packet data traffic channels are supported when MS is operating in A/Gb mode; when MS is operating in Iu mode, traffic channels, dedicated control channels, packet data control channels and packet data traffic channels are supported. The RLC/MAC layer is specified in TS 44.060 (A/Gb mode). Communication between the Physical Layer and the RLC/MAC layer is in an abstract way performed by means of PH primitives. They do not constrain implementations.
The PH primitives exchanged between the physical layer and the RLC/MAC layer are used for the transfer of RLC/MAC blocks. They are also used to indicate the establishment of packet data physical channels (A/Gb mode) or shared basic physical subchannels (Iu mode) to the RLC/MAC layer.
2.1b Flexible Layer One Interface to the Radio Link Control and Medium Access Control layer |R6|
In Iu mode, when the Flexible Layer One is used the physical layer interfaces the Radio Link Control and Medium Access Control (RLC/MAC) layer (see TR 45.902). On this interface transport channels are supported. Communication between the Physical Layer and the RLC/MAC layer is in an abstract way performed by means of PH primitives. They do not constrain implementations.
The PH primitives exchanged between the physical layer and the RLC/MAC layer are used for the transfer of transport blocks.
2.2 Interface to radio resource management Word‑p. 10
The physical layer interfaces the radio resource management (RR or RRC) entity of layer 3 in the MS and in the network. When the MS is operating in A/Gb mode the radio resource management is provided by the RR entity whilst when operating in Iu mode the radio resource management is provided by the RRC entity.
Communication is performed in an abstract way by means of MPH primitives. They do not constrain implementations.
The primitives exchanged with the RR management entity are related to the assignment of channels, physical layer system information (including measurement results), etc.
2.3 Interface to other functional units
The physical layer interfaces other functional units in the MS and in the network for supporting traffic channels. These interfaces are described in the 26, 27 and 46 series of Technical Specifications.
