1、m 3404583 0077862 918 m Released: July 1, 1993 GSM 04.04 Version: 4.0.1 Date: 25 June, 1993 Work Item No: Key words: European digital cellular telecommunication system (phase 2); Layer 1 - General Requirements ETSl European Telecommunications Standards Institute ETSl Secretariat: Route des Lucioles,
2、 F-O6921 Sophia Antipolis Cedex . France TP. + 33 92 94 42 O0 TF. + 33 93 65 47 16 Tx. 47 O0 40 F This is an unpublished work the copyright in which vests in the European Telecommunications Standards Institute. All rights reserved. The information contained herein is the propeny of ETSl and no part
3、may be reproduced or used except as authorised by contract or other written permission. The Copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. COPYRIGHT European Telecommunications Standards InstituteLicensed by Information H
4、andling Services3404583 0079LL9 L55 m Page 3 GSM 04.04 . version 4.0.1 : June 1993 Contents 1 . SCOPE 5 2 . INTERFACES TO THE PHYSICAL LAYER 5 2.1 . Interface to the Data Link Layer . 6 2.2. Interface to radio resource management . 6 2.3. Interface to other functional units 6 3 . SERVICE OF THE PHYS
5、ICAL LAYER 7 3.1. Service Access Point . 7 3.2. Service of the physical layer . 8 3.2.1 . Specific Services of the physical layer in the MS 8 4 . PRIMITIVES OF THE PHYSICAL LAYER . 9 4 . 1 . Generic names of primitives between layers 1 and 2 for the transfer of layer 2 frames: . 9 4.2. Generic names
6、 of primitives between layer 1 and the RR- management entity of layer 3 10 4.3. Primitive types 10 4.4. Parameter definition . 11 5 . PHYSICAL LAYER PROCEDURES 12 5.1 . States of the physical layer . 12 5.2. Control procedures 13 5.3. Physical layer interface procedures 13 6 . PHYSICAL LAYER PROTOCO
7、L HEADER . 13 6.1 . Physical layer protocol fields and procedures . 13 7 . Block transmission 14 7.1 . SACCH downlink block format 14 7.2. SACCH uplink block format 15 7.3. FACCH/SDCCH/CCCH/BCCH/CBCH downlink block format . 16 7.4. FACCH/SDCCH uplink block format . 17 7.5. Order of bit transmission
8、18 8 . VOCABULARY . 18 COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services. O m 3404583 0079320 977 I Page 5 GSM 04.04 - version 4.0.1 : June 1993 1. SCOPE This Technical Specification defines the service offered by the physical layer (GSM 05-series of
9、Technical Specifications) of the MS-BS interface (GSM 05- and 04-series of Technical Specifications). Its main objective is to be a guidance for the interface between the GSM Technical Specifications in the 05-series and the 04-series. It also specifies the format of signalling channels and the orde
10、r of bit transmission. When the mention for “further study“ or “FS“ or “FFS“ is present throughout this document this means this is not relevant for ETSI-GSM phase 1 standard. As far as possible, this Technical Specification makes use of the layering principles of the Reference Model for Open System
11、 Interconnection IOSI) as contained in CCllT recommendations X.200 and x.21 o. 2. INTERFACES TO THE PHYSICAL LAYER The physical layer (layer 1) is the lowest layer in the OS1 Reference Model and it supports all functions required for the transmission of bit streams on the physical medium. These bit
12、streams are transferred on traffic and control channels as defined in TS GSM 04.03. Note: For GSM application the physical layer may also be referred to as the radio subsystem. However, the radio subsystem supports functions additional to those described in this Technical Specification. The physical
13、 layer interfaces the Data Link Layer and the supported functional units of the application (figure 2.1 1. radio resources management I l 1 I Data Link Layer to other L I mi ts MPH-primitives PH-primitives ITCH V V V Physical Layer figure 2.1 Interfaces with the Physical Layer COPYRIGHT European Tel
14、ecommunications Standards InstituteLicensed by Information Handling ServicesPage 6 GSM 04.04 - version 4.0.1 : June 1993 b 2.1. Interface to the Data Link Layer The physical layer interfaces the data link layer. On this interface control channels are supported. The data link layer is specified in TS
15、 GSM 04.05 and 04.06. Communication between the Physical Layer and the Data Link Layer is in an abstract way performed by means of PH-primitives defined do not constrain implementations. Note: The terms physical layer and layer 1, and data link layer and layer 2, will be used synonymously in this Te
16、chnical Specification. 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. 2.2. Interface to radio resource management The physical layer interfaces the ra
17、dio resource management (RR-management) entity of layer 3 in the MS and in the network. 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 assignement of channels,
18、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 06 and 07 series of Technical Spe
19、cifications. COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling ServicesJ m 3YOY583 0079322 7qT m Page 7 GSM 04.04 - version 4.0.1 : June 1993 3. SERVICE OF THE PHYSICAL LAYER The physical layer supports transfer of bit streams on the radio medium according to
20、the Technical Specifications of the 05-series. The scope of the 05-series of Technical Specifications is the definition of a framework for operation on the radio medium. The application of this framework on the radio medium results in a transmission service. General characteristics of the service ob
21、tained by applying the framework of the 05-series at the operation on the radio medium are described in this section. 3.1. Service Access Point In the Reference Model for Open System Interconnection, Service Access Points (SAPS) of a layer are defined as gates through which services are offered to a
22、n adjacent higher layer (figure 3.1 I. Through a SAP the physical iayer offers a service to the data link layer. The SAP is used both for the control of the service providing entity (in case this is the physical layer; commands related to the establishment and release of channels) and the transfer o
23、f data (in case of the physical layer; the transfer of bits). The physical layer service access points defined in this Technical Specification differ from the OS1 physical layer Service Access Points; the layer 3 RR-management instead of the data link layer controls the SAPs (establishment and relea
24、se of channels). adjacent higher Layer adjacent higher layer SAP SAP figure 3.1 Service Access Point principle On the physical layer of the GSM system a SAP is defined between the physical layer and the data link layer for each control channel (figure 3.2). The characteristics of SAPs (channels) are
25、 listed in TS GSM 04.03. Data Link Layer BCCH PCH+ACCH RACH SOCCH SACCH FACCH figure 3.2 SAPs between the physical layer and the data link layer in the MS COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling ServicesD 3404583 0079323 b8b m Page 8 GSM 04.04 - vers
26、ion 4.0.1 : June 1993 3.2. Service of the physical layer * Access capabilities : The physical layer offers a transmission service on a limited set of logical channels. Th e BS and MS access capabilities and the characteristics of logical channels (SAPS) are defined in TS GSM 04.03. Note: Between TS
27、GSM 04.03 and the 05-series there is a slight difference in terminology. The channels mentioned in 04.03 are logical channels according to the 05-series (especially 05.02). The CCCH, a channel name commonly used in the 04-series, covers the logical channels of the type RACH, PCH and AGCH. Logical ch
28、annels are multiplexed on physical channels. Physical channels are the units scheduled on the radio medium. Some are reserved by the network for common use fa combination of CCCH and BCCH), others are assigned to connections with MSs (dedicated physical channels). In time the combination of logical
29、channels used on an assigned dedicated physical channel may change. Allowed combinations of logical channels on a dedicated physical channel are defined in TS GSM 04.03. Data on SAPS of control channels is exchanged in discrete blocks with a size of 23 or 21 (SACCH) octets. Synchronisation between l
30、ayer 1 and layer 2 is provided for piggy-backing of RR (receive ready) frames, and the starting of timers (T200). See also TS GSM 04.06. Error detection : The physical layer offers an error protected transmission service, it includes error detection functions and to a lower level, error correction f
31、unctions. Erroneous received frames are not offered to the data link layer. The probability of one or more errors in a physical block transferred by the physical layer is defined in TS GSM 05.03. Due to not specified methods of quality detection, the probability of residual errors in transferred blo
32、cks may vary between implementations. * Encryption : Security related functions implemented at the physical layer are described in TS GSM 03.20. An overview of the functions specified in the 05-series which create the service of the physical laver can be found in TS GSM 05.01. 3.2.1. Specific Servic
33、es of the physical layer in the MS Estabttshment of dedicated physical channels : Establishment of dedicated physical channels on the physical layer is controlled by the radio resources management of layer 3 (TS GSM 04.08). During operation on a dedicated physical channel, the physical layer measure
34、s the signals of neighbouring base stations and the signal quality of the used dedicated physical channel. Measurements are transferred to layer 3, measurement control information is offered by layer 3. cell/PLMN selection in idle mode : In idle mode the physical layer selects the best cell with its
35、 BCCHXCCH in close co-operation with layer 3, meeting requirements for PLMN selection specified in TS GSM 02.1 3. The idle mode procedures are not modelled within this Technical Specification. Examples of procedures for cell selection are described in TS GSM 05.08. The physical layer performs automa
36、tic crossover. COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling ServicesPage 9 GSM 04.04 - version 4.0.1 : June 1993 4. PRIMITIVES OF THE PHYSICAL LAYER The Physical layer interacts with other entities as illustrated in figure 2.1. The interactions with the d
37、ata link layer of Dm channels are shown in terms of primitives where the primitives represent the logical exchange of information and control between the physical layer and adjacent layers. They do not specify or constrain implementations. The interactions between the physical layer and layer 1 enti
38、ties for BmlLm channels are for further study. For the physical layer two sets of primitives are defined: Primitives between layer 1 and 2: PH - Generic name - Type: Parameters Primitives between layer 1 and the AR-management layer 3 entity: MPH - Generic name - Type: Parameters 4.1. Generic names o
39、f primitives between layers 1 and 2 for the transfer of layer 2 frames: The following primitive generic names are defined on the SAPS between the physical layer and the data link layer: PH-DATA: The PH-DATA primitives are used on a SAP to pass message units containing frames used for data link layer
40、 peer-to-peer communications to and from the physical layer. PH-RANDOM ACCESS: The PH-RANDOM ACCESS (PH-RAI primitives are used on the SAP of the RACH to request and confirm (in the MSl the sending of a random access frame and to indicate (in the network) the arrival of a random access frame. The ra
41、ndom access protocol is specified TS GSM 04.08. PH-CONNECT: The PH-CONNECT primitive is used on a SAP to indicate that the physical connection on the corresponding control channel has been established. PH-READY-TO-SEND: The PH-READY-TO-SEND primitve is used by the physical layer to trigger if applic
42、able piggy backing, the start of timer for layer 2 and the forwarding a data unit to layer l. It is passed to layer 2 just before a new physical block is transmitted. PH-EMPTY-FRAME: The PH-EMPTY-FRAME primitive can be used by the data link layer to indicate that no frame has to be transmitted after
43、 receiving the PH-READY-TO-SEND primitive. It enables polling of several layer 2 entities by layer 1 and support DTX. COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services3404583 0077325 959 I Page 10 GSM 04.04 - version 4.0.1 : June 1993 4.2. Generic nam
44、es of primitives between layer 1 and the RR- management entity of layer 3 The following primitive generic name is defined between layer 1 and the RR-management entity of layer 3: al MPH-INFORMATION: MPH-INFORMATION (MPH-INFO) primitives are used for the control of the physical layer by the RR-manage
45、ment of layer 3. This information activates and deactivates, configures and deconfigures, throughconnects and disconnects physical and logical channels. It is also used for the transfer of measurements and measurement control information from layer 1 to layer 3. 4.3. Primitive types The primitive ty
46、pes defined in this Technical Specification are: REQUEST: The REQUEST primitive type is used when a higher layer is requesting a service from a lower layer. INDICATION: The INDICATION primitive type is used by a layer providing a service to notify the next higher layer of activities in the layer. Th
47、is activities are directly related to the occurrence of a REQUEST primitive on the peer-protocol side. RESPONSE: The RESPONSE primitive type is used by a layer to acknowledge receipt from the INDICATION primitive type. CONFIRM: The CONFIRM primitive type is used by the layer providing the requested
48、service to confirm that the activity has been completed. COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services340V583 0077l12b 375 Page 11 GSM 04.04 - version 4.0.1 : June 1993 4.4. Parameter definition Primitives contain a variable amount of parameters.
49、The primitives with included parameters are listed in table 4.1. TABLE 4.1 : Primitives of the physical layer primitive MPH-INFO-REQ MS/BS RR(L3)-L1 message unit r dedicated channel control parameters idle mode system information absoluteframe No. measurements I xx MPH-INFO-CON MS/BS Ll-RR(L3) xx MPH-INFO-IND MS/BS Ll-RR(L3) xx X PH-CONNECT-IND MS/BS Ll-L2 X PH-DATA-REQ MS/BS L2-L1 xx PH-DATA-IND MS/BS Ll-L2 xx PH-RA-REQ MS L2-L1 X PH-RA-IND BS Ll-L2 X X PH-RA-CON MS Ll-L2 X X Parameters involved in the primitive exchange with the physical layer are: Message unit: The message unit conta
