Organizational structure of 3GPPIn China, the Project Coordination Group (PCG) is the top management organization and is responsible for overall coordination on behalf of the OP, such as 3GPPorganizational structure, time plan, work assignment, etc.Technical work is completed by the Technical Specifications Group (TSG).At present, 3GPP is divided into 3 TSGs (previously 5 TSGs, and then CN and T are combined into CT,GERANRevoked) are TSG RAN respectively（Wireless access network）TSG SA (business and system), TSG CT（Core networkAnd terminals).Each TSG is further divided into several working groups (WGs), each of which undertakes specific tasks. Currently, there are 16 WGs in total.For example, TSG RAN is divided into RAN WG1 (wireless layer 1), RAN WG2 (wireless layer 2 and layer 3), RAN WG3（wireless networkArchitecture and interface), RAN WG4 (RF performance), RAN WG5 (terminalConformance testing）And RAN WG6 (GERANWireless Protocol）Six working groups.
The standards and specifications formulated by 3GPP are managed with Release as the version. On average, one version will be formulated in one to two yearsR99, then to R4, and now to R16.
3GPP manages and carries out work in the form of projects. The most common forms are Study Item and Work Item.3GPP manages standard texts in series, such as commonWCDMAAnd TD-SCDMAAccess networkSome standards are in the 25 series, and some standards in the core network are in the 22, 23, and 24 series,LTEThe standard is medium in 36 series.
member
3GPP members include three categories: organizational partners, market representative partners and individual members.3GPP's organizational partners includeEuropeETSIJapanARIB, TTC in Japan, TTA in South KoreaU.S.AATIS, TSDSI andChina Communications Standardization AssociationSeven CCSAStandardization Organization。3GPP market representative partners are not official standardization organizations. They are institutions that provide 3GPP with market suggestions and unified opinions.TD-SCDMATechnical ForumThe number of market representative partners of the 3GPP Partner Program has increased to 6, including GSM Association, UMTS Forum, IPv6 Forum and 3GU.S.A（3G Americas），Global Mobile CommunicationsThe Global Mobile Suppliers Association.
China and 3GPP
ChinaWireless communication standardResearch Group（CWTS）Officially signed in South Korea in June 1999 and joined 3GPP and3GPP2, and become the organizational partner of these two currently mainly responsible for the third generation partner project.Before that, our country hadobserverThe identity of the two partners involved in standardization activities.
Development history
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As the largest and most important international communication standards organization in the world, 3GPP has played an important role in the formulation of 5G technical standards and the promotion of 5G commercialization.
R15 Yes5GThe first version of the standard, which was frozen in September 2018, is the basic version widely used by the global operators to build 5G networks, and defines non independencenetworking (NSA) and independent networking (SA), supporting enhancedMobile Broadband（eMBB）And some ultra-high reliability lowtime delayCommunication (uRLLC)Functional characteristicsTo meet the most urgent application needs of the market.
In July 2020, the second enhanced version R16 of 3GPP for 5G standard was officially released, and R16 standard improved theBasic capability, supportedinternational telecommunications union(ITU) eMBB and uR of the three application scenarios of 5GLLC. Massive machine communication（mMTC）Full businessScenarios, especially forVertical industryA lot of capacity expansion has been carried out for the needs of.[3]
In late March 2022, the third version of the global 5G standard - 3GPP R17 will complete the functional freeze of the third phase (that is, completesystem design）。In December 2019, 3GPP approved the research scope of Release 17.Although affected by the epidemic, 3GPP has been passed since late January 2020Online collaborationHowever, most of the established projects of Release 17 have been completed.The completion of Release 17 not only marks the successful completion of the first phase of 5G technology evolution, but also proves that mobileecosystemIt has strong tenacity and is committed to pushing 5G forward.[4]
On April 23, 2024, the 3GPP Project Coordination Group (PCG) formally approved the 6G LOGO at its 52nd meeting.[5]
6G LOGO
Standard version
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3GPP version
To meet the newmarket demandThe 3GPP specification constantly adds new features to enhance its own capabilities.In order to provide developers with a stable implementation platform and add new features, 3GPP uses the parallel version system. All versions are as follows:
1. Version 99
The earliest various third-generation specifications were compiled into the original version 99, which was completed in March 2000. Subsequent versions are no longer named after the year.The main contents of Version 99 are:
one
New WCDMA wireless access.Introduced a new set of air interface standards and used new wirelessInterface technologyWCDMA technology, which introduces protocols and mechanisms suitable for packet data transmission. The data rate can support 144, 384Kbit/s and 2Mbit/s.
two
hisCore networkIt is still the WCDMA core network evolved based on GSM.
three
The 3GPP standard provides three mechanisms for the development of services, namely CAMEL function for IP services, Open Service Architecture (OSA) and Session Initiation Protocol (SIP), and gives corresponding definitions in different versions.Version 99 has further enhanced the services in GSM, including transmission rate, frequency utilization and systemcapacityAll improved greatly.In terms of business, the 99 version supports basicTelecommunication serviceIn addition to bearer services, it can also support all supplementary services. In addition, it also supports location-based services (LCS), number portability services (MNP), 64kbit/s circuit data bearer, circuit domain multimedia services, and open service architecture.
2、Release4
At present, the latest full set of 3GPP specifications is named Release4 (R4).The R4 specification was "frozen" in March 2001, which means that only necessary amendments are allowed for R4 from now onRevision, no new features will be added.All R4 specifications have aVersion No。
Not included in the R4 wireless network technical specificationnetwork structureHas changed, but has added someInterface protocolEnhancements and features of, mainly including: lowChip rateTDD，UTRAFDDRepeater, Node B synchronization, for Iub and IurAAL2QoS optimization of connection, on Iuwireless access QoS negotiation of bearer (RAB), Iur and Iub'sRadio resource management(RRM) optimization, enhanced RAB support, modification process of transport bearer on Iub, Iur and Iu, WCDMA1800/1900 andSoft switchingImprovement of DSCH power control in.
The main features of R4 on the core network are:
one
Separation of call and bearer in circuit domain:Mobile switching center(MSC) is divided into MSC Server and MGWcall control Completely separate from the bearing.
two
Core networkInternalSignaling No.7Stage 3: Support the transmission of SS7 between two core network functional entities in a different network based manner, such as MTP, IP and ATM network transmission.
three
R4 has further enhanced the 99 version in business, and can support theMultimedia message service, enhance the emergency call service, MexE, real-time fax (supporting three types of fax services) and the blocking decided by the operator (allowing the operator to completely or as requiredPacket Data ProtocolBlocking user access in the establishment phase).
3、Release5
If the specification finds that new features need to be added after the freezing period, a new version of the specification shall be formulated.New features are being added to Release5 (R5).The first version of R5 was frozen in March 2002. After R5 has formed a full set of specifications, it can be completely frozen in June 2002.New features that are not added to R5 in time will be included in subsequent versions of R6.All R5 specifications have a version number in the form of "5. x.y".
3GPP
R5 will completeIP multimedia subsystem（IMS）The definition of, such as routing and the main part of a multimedia session.The completion of R5 will be the steeringAll IP networkOur operators provide a basis for starting construction.
The main characteristics of R5 plan are:
one
IP transmission in UTRAN, access to high-speed downlink packet data services (HSDPA), hybrid ARQII/III, support for RAB enhancements, and support for Iub/IrRadio resource managementOptimization, UE positioning enhancement, different RANs in the same domainnodeWith multipleCore networkNode connection and other original R5 functions.
two
R5 inCore networkThe main features of the aspect include: M3UA (SCCP User Adaptation) transmissionSignaling No.7IMS service implementation, emergency call enhancement and network security enhancement.In addition, Rel-5 can support Iu and Iur-g interfaces from UTRAN to GERAN on the network interface, thus realizing the interworking between WCDMA and EDGE.
three
In terms of business applications, R5 is mainly intended to strengthen the following aspects: support for IP based multimedia services, CAMEL Phase4, Global Text Telephony (GTT), and Push services.
As the IP multimedia subsystem is a major feature of R5, 3GPPtechnical standardThe group discussed and studied it many times.IMS is positioned to provide operators withmultimedia service , rather than replacing the mature circuit domain services, so as to be more compatible with the 99 version to complete the smooth evolution process of the system.The standardization process of 3GPP is actually a parallel process of 99 version, R4 and R5. It takes a lot of time to improve 99 version and R4.In order to avoid repeated formulation of a certain standard and consider the unification with the fixed network standard, 3GPP decided that some standards related to IMS will be directly adoptedIETFAnd ITU-T standards.
4、Release6
The R6 version has just started to study. Its network architecture is the same as that of R5. It mainly studies business and interworking with other networks.Introduced in R6HSUPA。
To learn more about the main contents of each system version of the 3GPP technical specification (including R7R8, R9) Please enter.
5.Release7
At this stage, more consideration has been given to the characteristics of the fixed, and the standardization of fixed and mobile convergence has been strengthened.
6.Release8
3GPP began to study qk traffic control and IMS centralized services implemented by IMS domain in the R8 phase.The biggest highlight of this service is that it can be used as a small peer access domain（CS Domain, PS domain) users provide a consistent and continuous business experience. The key point of technology is how to enable users accessing the cs domain to useIMS business。
In the architecture of IMS centralized services, SCCASExcept as UESIPThe most important thing for uA to establish and control IMS sessions isCalled userIt provides access domain selection function.SCC AS can select domains according to the capabilities of the access network and UE, IMS registration status, CS status, operator policies and other factors.For those supporting 12 and 13 interfacesMSCServer，It shall have the enhancement capability of CS signaling and IMS SIP interworking.
7.Release9
3GPP will complete the research work of 11 interfaces between ICS LIE and SCC AS in R9, including the protocol structure of 11 interfaces, and the application of 11 interfaces to LjFunctional entityAction, interaction between ICS UE and SCC ASSupplementary businessControl process, etc.[2]
Version change
For 3GPP2, there are many versions. At present, there are Release 0, A and B versions, and these versions are constantly updated.All IP based Release C is also under study.
The standards for commercialization preparation are mainly based on Release 0 and Release A.These two versions were stable at the end of 2000 and the beginning of 2001.Due to the existing standards based on cdmaOne and the technical specifications of IETF, the standard is more mature than 3GPP.
However, due to the consistency andOpennessIt is weaker than 3GPP, so operators and manufacturersCDMA2000The selection of the whole system version is not completely consistent, which brings some difficulties to the intercommunication between devices and roaming between different networks.
3GPP2 has studied the enhanced technology 1X/EV of cdma2000-1X since 2000.In September 2000, 3GPP2 completed the enhanced technology 1X that can support the cdma2000-1X with a peak rate of 2.4Mbps/EV-DO(Data Only) standardization.Furthermore, the 1X/EV-DV (Data and Voice) standard supporting the rate above 5Mbps is studied.
3GPP2 Release
C is an all IP standard. Similar to 3GPP, 3GPP2 has made slow progress in Release C due to its focus on improving the existing version.
