HUAWEI TECHNOLOGIES CO., LTD. www.huawei.com HUAWEI Confidential Security Level: 内内内内 Guide to GSM and WCDMA Protocols ISSUE1.0
Oct 25, 2014
HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
HUAWEI Confidential
Security Level: 内部公开
Guide to GSM and WCDMA Protocols
ISSUE1.0
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Upon completion of this course, you will be able to:
Learn basic concepts in telecom protocols
Learn general knowledge of GSM protocols
Learn general knowledge of WCDMA protocols
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Chapter 1 Basic Concepts in Telecom ProtocolsChapter 1 Basic Concepts in Telecom Protocols
Chapter 2 Guide to GSM Protocols
Chapter 3 Guide to WCDMA Protocols
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International Organizations for Standardization
ITU International Telecommunications Union Telecommunication standards
ISO International Standard Organization Common standards
ETSIEuropean Telecommunications Standards
InstituteEuropean standards
IETF Internet Engineering Task Force Internet standards
UMTSUniversal Mobile Telecommunications
System
GSM Global System for Mobile Communications GSM standards
3GPP 3rd Generation Partnership Project 3GPP standards
IEEEInstitute of Electrical and Electronics
Engineers
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Open System Interconnection Model
Facilitating communication between applications
Processing data format and performing data encryption
Establishing, maintaining and managing a session
Setting up end-to-end connection between hosts
Performing routing
Providing media interaction and link management
Managing bit stream transmission
Application Layer
Presentation Layer
Session Layer
Transport Layer
Network Layer
Data Link Layer
Physical Layer1
2
3
4
5
6
7
Bottom layer: managing network data transmission
Upper layer: managing host data transmission
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SAP and Primitives Service access point (SAP) is a point at which the N layer provides services for N+1 layer.
Primitives are categorized into the following types:•REQUEST primitive: used when a higher layer is requesting a service from the next lower layer•INDICATION primitive: used by a layer providing a service to notify the next higher layer of activities related to the primitive type REQUEST•RESPONSE primitive: used by a layer to acknowledge receipt, from a lower layer, of the primitive type INDICATION•CONFIRM primitive: used by the layer providing the requested service to confirm that the activity has been completed
N+1 layer N+1 layer
N layer N layer
RequestConfirm ResponseIndcation
Entity ofN+1 layer
Entity of Nlayer
*SAP
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Protocol Stack
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Protocol Structure
In general, a protocol consists of the following sections:
Introduction (scope, references and abbreviations) Background knowledge (protocol significance and relation with other protocols) Detailed description (related processes, such as the objective, operation, and result) Related messages Information element codes in messages Appendix (supplementary description of key points in the protocol)
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The Way to Read Protocols
To read protocols effectively, follow the principles below:
Read a protocol from the general introduction to the detailed description step by step, that is, from the easy to the difficult. Read the outline first to get a general knowledge of the contents, and then browse the whole context. Analyze the introduction section to find out the source and objective of the protocol. Focus on the basic processing flow, and combine the message (and message codes if necessary) learning with the protocol learning.
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Questions
Can you recall any international organization for standardization?
What is the OSI model?
What is the basic structure of a protocol?
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Chapter 1 Basic Concepts in Telecom Protocols
Chapter 2 Guide to GSM protocolsChapter 2 Guide to GSM protocols
Chapter 3 Guide to WCDMA protocols
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Development of GSM
Mobile communication has gone through the development from analog communication to digital communication. The digital mobile communication mechanism at present consists of GSM (Pan-Europe), ADC (the US) and JDC (PDC now, Japan). Following are the milestones in the GSM development. In 1982, Conference of European Postal and Telecommunications Administrations (CEPT) set up the GSM, targeting at developing the second generation of mobile communication system. In 1986, the eight systems proposed after numerous researches and experiments were tested on site in Paris. In 1987, the GSM member states achieved an agreement on adopting the technologies such as the TDMA, RPE-LTP, and GMSK after the on-site tests and demonstrations. In 1988, 18 European countries signed the GSM memorandum of understanding. In 1989, the GSM recommendations took effect. In 1991, the GSM technology and network were formally adopted in Europe. The second generation of mobile communication came into being. The GSM experienced the updating from V5, V6 to V7. The GPRS was introduced at the V6 stage. The 3GPP was established. In 1999 and 2000, the 3G 1999 and 3G 2000 were put forward respectively.
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GSM Recommendations (1)GSM network description: GSM 01.02GSM protocol abbreviations: GSM 01.04Cheating-proof system: GSM 01.31 and GSM 02.31Lawful interception: GSM 01.48 、 GSM 02.33GPRS: GSM 01.60, GSM 01.61, GSM 02.60, GSM 04.60, GSM 04.64 and GSM 04.65GSM service principles: GSM 02.01GSM bearer service: GSM 02.02GSM telephony service: GSM 02.03GSM supplementary service: GSM 02.04, GSM 03.11 and GSM 09.11Mobile station: GSM 02.06 , GSM 02.07 , GSM 02.30 , GSM 02.40 and GSM 03.22IMEI: GSM 02.16ODB: GSM 02.41 and GSM 03.15Network indicator and time zone: GSM 02.42SoLSA: GSM 02.43 and 3G 23073PDS: GSM 02.63 and GSM 04.63 、MNP: GSM 02.66eMLPP: GSM 02.67 and GSM 04.67VGCS: GSM 02.68VBS: GSM 02.69LCS: 3G 22071CD: GSM 02.72 、 GSM 04.72
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GSM Recommendations (2)CAMEL: GSM 02.78, GSM 03.78 and GSM 09.78SOR: GSM 02.79 and GSM 03.79Calling line identification service: GSM 02.81, GSM 03.81, and GSM 04.81Call forwarding service: GSM 02.82, GSM 03.82 and GSM 04.82Call waiting and call holding: GSM 02.83, GSM 03.83 and GSM 04.83MPTY: GSM 02.84 、 GSM 03.84 and GSM 04.84CUG: GSM 02.85 、 GSM 03.85 and GSM 04.85Aoc and CAI: GSM 02.86, GSM 02.24, GSM 03.86 and GSM 04.86Call Barring: GSM 02.88, GSM 03.88 and GSM 04.88Network capability and structure: 03.xxUser data recovery: GSM 03.07User data management: GSM 03.08 and GSM 03.16Switchover: GSM 03.09Location update: GSM 03.12DTMF support: GSM 03.14Basic call processing: GSM 03.18Network safety: GSM 02.09 and GSM 03.20SMS: GSM 03.40 and GSM 04.11SMSCB: GSM 03.41 and GSM 04.12Videotex and fax: GSM 03.43, GSM 03.44, GSM 03.45 and GSM 03.46Interaction between GSM and other networks: GSM 03.47, GSM 03.49, GSM 03.50, GSM 03.70 and GSM 09.01
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GSM Recommendations (3)UUS: GSM 03.87 and GSM 04.87USSD: GSM 03.90 and GSM 04.90ECT: GSM 03.91 and GSM 04.91CCBS: GSM 03.93 and GSM 04.93CNAP: GSM 03.96 and GSM 04.96MSP: GSM 03.97MS-BS-BSS-A interface: GSM 04.01, GSM 04.02, GSM 04.03, GSM 04.04, GSM 04.05, GSM 04.07, GSM 04.08, GSM 04.10, GSM 04.11, GSM 04.12, GSM 04.13, GSM 04.14, GSM 04.18, GSM 04.21, GSM 04.22, GSM 04.80 and GSM 08.xxCTS: GSM 04.56 and GSM 04.57GCC: GSM 04.68BCC: GSM 04.69BSS physical layer: GSM 05.xxFull rate and half rate: GSM 06.xxTerminal: GSM 07.xxMAP: GSM 09.02Interaction with PSTN/ISUP: GSM 09.03, GSM 09.04, GSM 09.05, GSM 09.06, GSM 09.07 and 09.12E interface BSSAP: GSM 09.08BSS-NSS information mapping: GSM 09.10SIM-ME interface: GSM 09.91FIGS: GSM 02.31
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GSM System Structure and InterfacesThe GSM system structure is defined in the 03.02 recommendation.
GSM supports the following interfaces in the CS domain of the core network:A: BSC<->MSCB: MSC<->VLRC: MSC<-HLRD: VLR<->HLRE: MSC<->MSCF: MSC<->EIRG: VLR<->VLR
H: HLR<->AuC
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A interface Protocol Stack
Radio resource management (RR)
Mobility management (MM)
Call control (CC)
Message transfer part (MTP)
Signalling connection control part (SCCP)
BSS operation and maintenance application part (BSSOMAP)
Base station subsystem application part (BSSAP)
BSS management application part (BSSMAP)
Direct transfer application part (DTAP)
Layer3-CCLayer3-MMLayer3-RR
Data link layer
Physical layer
SCCP ITU-T Q712/713/714MTP3 ITU-T Q704MTP2 ITU-T Q703MTP1 ITU-T Q702
ITU-T G711
DTAP GSM 04.08 08.06BSSMAP GSM 08.06 08.08
BSSAPBSSOMA
P
DTAP
BSSMAP
SCCPMTP3MTP2MTP1
PCM-A
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Questions
Can you recall any main recommendation of GSM?
Can you recall any main interface of GSM?
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Chapter 1 Basic Concepts in Telecom Protocols
Chapter 2 Guide to GSM protocols
Chapter 3 Guide to WCDMA ProtocolChapter 3 Guide to WCDMA Protocol
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3GPP Specification Description
Same to the naming convention of GSM specifications, 3GPP specifications are named in the format of 2X.XXX. The 21-series requirements specifications put forward requirements for certain specifications to be standardized. After the specifications are standardized, the 21-series requirements specifications are not used or used to describe the system performance.
Among them, the 21.101 specifications are important references to query the specifications from the 21 series to the 35 series.
Specifications recommended:21.101 3rd Generation mobile system Release 1999 Specifications21.102 3rd Generation mobile system Release 4 Specifications 21.905 3G Vocabulary
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Mobile Service Specifications• Telecom service (3GPP TS 22.003)
TS11 Telephony
TS12 Emergency Calls
TS21 Short message MT/PP 3GPP TS 23.040
TS22 Short message MO/PP 3GPP TS 23.040
TS23 Cell Broadcast Service 3GPP TS 23.041
TS61 Alternate speech and facsimile group 3 ITU-T T.30
TS62 Automatic Facsimile group 3 ITU-T T.30
TS91 Voice Group Call Service 3GPP TS42.068
TS92 Voice Broadcast Service 3GPP TS42.069 • Bearer service (3GPP TS 22.002/29.007)
BS2X Asynchronous General Bearer Service
BS3X Synchronous General Bearer Service
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Mobile Service Specifications• Supplementary service (3GPP TS 22.003)
22.004 General on supplementary services
23.011 Technical realization of supplementary services
24.010 Mobile radio interface layer 3-supplementary services specification-
general aspects
24.080 Mobile radio layer 3 supplementary service specification; Formats
and coding
29.011 Signaling interworking for supplementary services
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Mobility Management Specifications
23.007 Restoration procedures
23.016 Subscriber data management
23.012 Location management procedures
24.008 Mobile radio interface layer 3 specification
29.002 Mobile application part (MAP) specification
23.122 Non-Access-Stratum functions related to mobile station (MS) in idle mode
25.304 UE procedures in idle mode and procedures for cell reselection in connected mode
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ISUP Recommendations (1)
Entry Source Description
ISDN User Part functional description
Q.761 This recommendation describes the ISDN user part function.
ISDN user part general functions of messages and signals
Q.762This recommendation describes the messages, parameters and the signaling information contained within parameters used by the ISDN user part protocol, and their functions.
ISDN user part formats and codes
Q.763This recommendation specifies the formats and codes of the ISDN user part messages and parameters required to support basic bearer services and supplementary services.
ISDN user part signaling procedures
Q.764
This recommendation describes the ISDN user part signaling procedures of the set-up and clear down of national and international ISDN connections used for "ISUP'97". Actions common for all types of exchanges are described only once. Different or additional actions required in an exchange are specified in a separate sub clause applicable to that type of exchange. The procedures specified in clause 2 relate to basic calls (for example, calls not involving supplementary services and IN).
performance objectives Q.766
Signaling availability
Signaling dependability
Signaling delay
Signaling system limitations
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ISUP Recommendations (2)
Entry Source Description
ISDN supplementary services Q.730
This recommendation provides general information for ISDN supplementary services. It describes generic procedures, network specific facilities and end-to-end signaling methods. It also contains the generic format for the supplementary service descriptions contained in Recommendations Q.731 to Q.737, to be used in conjunction with the ISDN User Part (ISUP) defined in Recommendations Q.761 to Q.764 and Recommendation Q.767 "Application of the ISDN user part of CCITT Signaling System No. 7 for international ISDN connections". A listing of the currently defined supplementary services is included as well.
Numbering planCCITT Recommendation E.164
It is assumed that the ISDN follows the international numbering plan defined for the ISDN and provides a basic circuit switched service between ISDN terminals or between ISDN terminals and terminals being connected to the existing international telephone network.
Test specificationQ.784- Q.785
ISUP basic call test specification.
ISUP protocol test specification for supplementary services
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TUP Recommendations (1)
Entry Source Description
TUP function description Q.721 This recommendation describes the TUP function.
TUP general functions of messages and signals
Q.722This recommendation describes the general function of telephone signaling messages and the telephone signals and other information components contained in those messages.
Formats and codes Q.723
Basic format characteristics
Label
Telephone signal message formats and codes
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TUP Recommendations (2)
Entry Source Description
Signaling procedures Q.724 Normal call set‑up
Dual seizure with both‑way operation
Automatic repeat attempt
Speed of switching and signal transfer in international exchanges
Blocking and unblocking of circuits and circuit groups
Release of international connections and associated equipment
Continuity‑check for 4‑wire speech circuits
Continuity‑check for 2‑wire speech circuits
Interruption control for multiplex systems
Supplementary services
Echo suppressor control
Congestion control
Telephone User Part outage
State transition diagrams
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TUP Recommendations (3)
Entry Source Description
Signaling Performance Q.725 Signaling performance in the telephone application
Test specification Q.783 This recommendation contains a set of detailed tests for the Signaling system No. 7 telephony user part (TUP).
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UMTS System Structure and Interfaces
BSS
BSC
RNS
RNC
CN
Node B Node B
IuPS
Iur
Iub
USIM
ME
MS
Cu
Uu
MSC server SGSN
Gs
GGSN GMSC server
Gn HLR
Gr
Gc C
D
Nc
H
EIR
F Gf
Gi PSTN
IuCS
VLR B
Gp
VLR
G
BTS BTS
Um
RNC
Abis
SIM
SIM-ME i/f or
MSC server
B
PSTN
cell
CS-MGW CS-MGW
CS-MGW
AuC
Nb
Mc Mc
Nb
PSTN PSTN
Nc
Mc
Mh
A Gb
E
The UMTS system structure is defined in the 23.002 recommendation.
UMTS supports the following interfaces in the CS domain of the core network:A: BSC<->MSCB: MSC<->VLRC: MSC<-HLRD: VLR<->HLRE: MSC<->MSCF: MSC<->EIRG: VLR<->VLRH: HLR<->AuC
IuCS: MSC<->RNCMc: MSC<->MGWNc: MSC<->MSCNb: MGW<->MGWGs: VLR<-SGSN
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IU-CS Interface Protocol Stacks
Q.2150.1
Q.2630.2
RANAP Iu UP Protocol Layer
Transport Network
Layer
Physical Layer
Transport User
Network Plane
Control Plane User Plane
Transport User
Network Plane
Transport Network Control Plane
Radio Network
Layer
ATM
SSCOP
AAL5
SSCOP
SSCF-NNI
AAL2 AAL5
MTP3b MTP3b
SCCP
SSCF-NNI
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Description of IU-CS Interface Protocol Stack
Based on the vertical plane structure of the Iu-CS protocol, the Iu-CS interface protocol can be described in the following aspects:
• Control plane: The RANAP (TS25.413) and signaling bearer (TS25.412) recommendations are used on this plane. • User plane: The IuUP (TS25.415) and data bearer (TS25.414) recommendations are used on this plane. • Transport network control plane: The ALCAP (ITU-T Q.2630.1 and ITU-T Q.2630.2) and signalling bearer (TS25.414) recommendations are used on this plane. List of recommendations: 23.930 Iu principles23.110 UMTS access layer services and functions25.410 UTRAN Iu interface: Introduction and principles25.411 UTRAN Iu interface: UTRAN Iu layer interface 1 25.412 UTRAN Iu interface: Signaling transport25.413 UTRAN Iu interface: RANAP signaling25.414 UTRAN Iu interface: Data transport and transport signaling25.415 UTRAN Iu interface: User plane recommendation25.419 UTRAN Iu interface: Service area broadcast protocol (SABP)
ITU-T Recommendation Q.2210 MTP3-B
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Structure of RANAP Protocol Stack
The structure of RANAP protocol stack is based on the following signaling bearer systems:
• ATM-based broadband SS7 (SAAL-NNI, MTP3b and SCCP)
• IP-based signaling transmission system (IP, SCTP and M3UA)
The RANAP protocol stack consists of the following parts:
• Radio access network application part (RANAP) (TS25.413) on radio network layer
• Signaling bearer part on transport network layer
RNC
(b)
Iu-CSRNC
(a) ATM-based
MSC Server(MSOFTX3000)
Iu-CS
RANAP
SCCP
M3UA
SCTP
IP
RANAP
SCCP
MTP3B
STC
SAAL
AAL5
ATM
PL
RANAP
SCCP
MTP3B
STC
SAAL
AAL5
ATM
PL
MSC Server(MSOFTX3000)
MAC
RANAP
SCCP
M3UA
SCTP
IP
MAC
RNC
(b) IP-based
Iu-CSRNC
(a)
MSC Server(MSOFTX3000)
Iu-CS
RANAP
SCCP
M3UA
SCTP
IP
RANAP
SCCP
MTP3B
STC
SAAL
AAL5
ATM
PL
RANAP
SCCP
MTP3B
STC
SAAL
AAL5
ATM
PL
MSC Server(MSOFTX3000)
MAC
RANAP
SCCP
M3UA
SCTP
IP
MAC
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Structure of MAP Protocol Stack
SCCP ITU-T Q712/713/714MTP3 ITU-T Q704MTP2 ITU-T Q703MTP1 ITU-T Q702
ITU-T G711
TCAP ITU-T Q771/772/773TCAP
SCCPMTP3MTP2MTP1
PCM-A
MAP GSM 29.002
The mobile application part (MAP) protocol defines how messages are exchanged between CDMA network entities for the purpose of realizing the MS roaming function. The involved network entities include the MSC Server, VLR, SGSN, HLR, SMC and GMLC.
In the UMTS network, the C, D, E, G, Lg and L interfaces can all transfer MAP messages. The MAP protocol at the C and D interfaces implements signaling interaction of the following services:
• Location registration• Authentication• Subscriber management• Fault recovery (user data recovery during PRN)• Call handling (routing information and roaming number retrieval)• Supplementary service • PSI (provide subscriber information)
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Structure of E Interface Protocol Stack
When related mobile signaling is transferred on the E interface, the MAP protocol stack is adopted. The MAP protocol implements signaling interaction of the following services:
• Inter-office handover
• SMS transfer
When traffic data is transferred on the E interface, the TUP/ISUP protocol stack is adopted.
MTP3 ITU-T Q704MTP2 ITU-T Q703MTP1 ITU-T Q702
ITU-T G711
ISUP Q.76XISUP
MTP3MTP2MTP1
PCM-A
TUP TUP Q.72X
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E Interface Protocol Stack
MS/BSS-A
MSC-A MSC-B
MAP-Prep-Handover req. MAP-Allocate-Handover-Number req.
A-HO-REQUEST
A-HO-REQUIRED
BSS-B/MS
VLR-B
A-HO-REQUEST-ACK
MAP-Send-Handover-Report req. MAP-Prep-Handover resp.
IAM MAP-Send-Handover-Report resp. (1)
ACM A-HO-COMMAND
A-HO-DETECT
A-HO-COMPLETE
MAP-Process-Access-Sig req. MAP-Send-End-Signal req. A-CLR-CMD/COM
ANSWER
RELEASE End of call
MAP-Send-End-Signal resp.
NOTE 1: Can be sent at any time after the reception of IAM
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F Interface Protocol Stack
The F interface protocol stack also belongs to the MAP protocol stack. The F interface protocol stack implements the signaling interaction of the CheckImei service to check the international mobile station equipment identity (IMEI).
SCCP ITU-T Q712/713/714MTP3 ITU-T Q704MTP2 ITU-T Q703MTP1 ITU-T Q702
ITU-T G711
TCAP ITU-T Q771/772/773TCAP
SCCPMTP3MTP2MTP1
PCM-A
MAP GSM 29.002
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Mc Interface Protocol Stack
H.248
SCTP
IP
MAC
L1
(G)MSC ServerMc
MGW
(a)
McMGW
(b) ATM-based
(G)MSC Server
H.248H.248
SCTP
IP
MAC
L1
STC
SAAL
AAL5
MTP3B
ATM
PL
H.248
STC
SAAL
AAL5
MTP3B
ATM
PL
H.248
SCTP
IP
MAC
L1
(G)MSC ServerMc
MGWMc
MGW
(b)
(G)MSC Server
H.248H.248
SCTP
IP
MAC
L1
STC
SAAL
AAL5
MTP3B
ATM
PL
H.248
STC
SAAL
AAL5
MTP3B
ATM
PL
IP-based
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Nc Interface Protocol Stack
BICC
SCTP
IP
MAC
L1
(G)MSC ServerNc
MSC Server
(c) SCTP/IP-based
NcMSC Server
(d) ATM-based
(G)MSC Server
BICCBICC
SCTP
IP
MAC
L1
STC
SAAL
AAL5
MTP3B
ATM
PL
BICC
STC
SAAL
AAL5
MTP3B
ATM
PL
BICC
MTP3
MTP2
MTP1
(G)MSC ServerNc
MSC Server
(a) TDM-based
(G)MSC ServerNc
MSC Server
(b) M3UA-based
BICC
L1
BICC
M3UA
IP
MAC
L1
BICC
MTP3
MTP2
MTP1
SCTP
M3UA
IP
MAC
SCTP
BICC
SCTP
IP
MAC
L1
(G)MSC ServerNc
MSC Server
(c)
NcMSC Server
(d)
(G)MSC Server
BICCBICC
SCTP
IP
MAC
L1
STC
SAAL
AAL5
MTP3B
ATM
PL
BICC
STC
SAAL
AAL5
MTP3B
ATM
PL
BICC
MTP3
MTP2
MTP1
BICC
MTP3
MTP2
MTP1
(G)MSC ServerNc
MSC Server
(a)
(G)MSC ServerNc
MSC Server
(b)
BICC
L1
BICC
M3UA
IP
MAC
L1
BICC
MTP3
MTP2
MTP1
BICC
MTP3
MTP2
MTP1
SCTP
M3UA
IP
MAC
SCTP
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BICC ProtocolThe bearer independent call control protocol (BICC) is a bearer-unspecific call control protocol used in the backbone network. It is used in data networks including the ATM network and IP network to bear the PSTN/ISDN service comprehensively. Therefore, BICC is considered as an important tool to facilitate the change from the traditional telecommunication network to the multi-service integration platform.
The control part and bearer part are separated in BICC. That is, BICC does not directly control the media resources (ATM and IP), but controls them through standard bearer control protocol (H.248 protocol).
BICC is developed based on the narrowband ISUP protocol. It can be considered as a version that comes out of narrowband ISUP protocol with the detailed circuit control part deleted. However, it can never be compatible with the ISUP protocol.
Theoretically, BICC can be used in all types of signal transport protocol stack to provide bearer-unspecific call control.
The BICC protocol includes the ITU-T recommendations Q.1902, Q.2150 and Q.765.
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BICC ProtocolsThe bearer-unspecific BICC protocol proposed by the ITU-T has three different versions. They are CS1, CS2 and CS3.
Protocol model, coding and decoding, and call flowQ.1902.1: BICC CS2 Function description (functionality and protocol model)Q.1902.2: BICC CS2 Common functions of messages and parametersQ.1902.3: BICC CS2 Format and coding/decoding of messages and parametersQ.1902.4: BICC CS2 Call flow and supplementary abnormity processing flow
APM Q.1950: Call bearer control protocol Q.1970: IP bearer control protocol Q.1990: BICC bear Control Tunnel ProtocolQ.765: Application transport mechanismQ.765.5: APM coding type
Signaling bearerQ.2150.0: Common signaling transport serviceQ.2150.1: STC on MTP3 and MTP3bQ.2150.2: STC on SSCOP and SSCOPMCEQ.2150.3: STC on SCTP
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Nb Interface Protocol Stack
MGWMGW
NbIu
Tra
nsport
Layer
SRNC
Radio Protocols
Iu UP Iu UPNb UP
Nb UP
Nb UP
AAL-2 SAR SSCS (I.366.1)
AAL2 (I.363.2)
ATM
Nb UP
RTP
UDP
IPv4 or IPv6
HUAWEI TECHNOLOGIES CO., LTD. Page 42HUAWEI Confidential
CAP Interface Protocol Stack
SCCP ITU-T Q712/713/714MTP3 ITU-T Q704MTP2 ITU-T Q703MTP1 ITU-T Q702
ITU-T G711
TCAP ITU-T Q771/772/773TCAP
SCCPMTP3MTP2MTP1
PCM-A
CAP GSM 23.078 29.078
The CAMEL application part (CAP) is developed based on the INAP protocol used in the wired intelligent network. CAP supports the CAMEL service by enabling the signaling interaction between functional entities (GSM SSF, GSM SRF and GSM SCF) of the wireless intelligent network (WIN). CAP is part of the SS7, belonging to the user part of the transaction capability application part (TCAP). It uses the structured/unstructured conversation capability provided by the TCAP to realize the signaling interaction between different entities.Recommendations:• ETSI /3GPP CAMEL Phase1, Phase2, Phase 3 and Phase 4• TS 23.078 (SSF/SCF) • TS 23.018(Call flow) • TS 29.078 (CAP)
HUAWEI TECHNOLOGIES CO., LTD. Page 43HUAWEI Confidential
Questions
Can you recall any main interface in WCDMA?
Can you explain the relation between GSM and WCDMA?
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