The 5G Standard



3GPP Technical Specification Groups (TSGs) and their Working Groups are encouraged to liaise directly with the relevant technical groups – whether within 3GPP or externally – as appropriate.

Liaison statements contain:

1. An Overall Description:
Clearly communicates what is expected from the receiver, i.e., which parts are for information, which questions are expected to be clarified and by whom (especially if there are multiple recipients)

2. Actions:
E.g. “ respectfully requests to take the above into account, and to kindly inform of the decision/response/recommendation, etc.

3. Date of Next Meeting:
Indicates when an answer is needed, e.g., when is the next meeting of the group sending the liaison statement takes place. 3GPP maintains a list of external organizations with which 3GPP has exchanged liaisons. Liaison Statements from external organizations should be sent to to allow proper registration and distribution inside of 3GPP.

This page is maintained by the Liaison Co-ordinator.

Incoming Liaisons Targeted for the Next Meeting

Outgoing Liaisons Result from Last Meeting

Bodies with Which 3GPP Has Exchanged Liaisons

Requests for additions, or changes, to this list should be made by the relevant TSG Chair to the Liaisons Coordinator, Susanna Kooistra.
Direct liaison between related groups in 3GPP and 3GPP2
450 MHz Alliance
liaison with AISG to discuss remote control of antennas
Agreed in March 2004
Broadband Forum (BBF)
To facilitate further convergence of 3GPP technologies with wired networks
International Special Committee on Radio Interference (CISPR)
Obtain information on developments in EMC measurement methods and limits
CTIA (Cellular Telecommunications & Internet Association)
To develop test methods for UE antenna performance measurement
Digital Video Broadcasting (DVB) Project
The DVB Project are considering the use of the 3G system as a satellite broadcasting return channel.
Liaison for potential introduction of a CLI (Common language Interface) based classmark for the next release. The new classmark would be based on CLI which will be standardized within Ecma International
Expert Group for Emergency Access (EGEA)
Approved by PCG 2008-08-18
Liaison with Eurescom for the exchange of information on OSA/Parlay activities
European Co-operation in the field of Scientific and Technical Research (COST)... and in particular COST 273 (Towards Mobile Broadband multimedia networks
To develop test methods for UE antenna performance measurement
European Radiocommunications Committee (ERC)
General liaison on spectrum issues.
Approved by PCG 2005-11-21
Certification of mobile wireless terminals
Liaison with BARG and SERG subgroups for charging and service aspects, and with the Security Group.
To be added
To ensure the alignment in the development of AT commands.
Liaison for the development of 3G/Wireless Lan interworking scenarios (IEEE 802.11) For development of network synchronisation for the 3G Long Term Evolution Radio Access Network architecture (IEEE 1588) Etc.
Mobile IP matters, HTTP client-server negotiation and security issues
Evaluating and defining how best to handle data synchronization between end user devices and external world sources.
General liaison with 3GPP regarding Interoperability testing for H.324 M and Packet Switched Streaming
Liaison on Multimedia Streaming Specifications
ISO-ITU expert group
Liaison on ASN.1 language and encoding rules.
Liaison with ISO MPEG / JPEG engineering committees to ensure interworking between 3GPP and ISO MPEG / JPEG solutions.
Coordination of common Requirements & Analysis methodology.
JAIN tm (Javatm APIs for Integrated Networks)
Liaison with JAIN for reasons of parallel working
Liaison for reasons of parallel working
For work of interest to both parties such as anonymous target mobile, anonymous requestor, enhanced codeword, subscriber certificates and Generic User Profile (GUP).
Approved by PCG 2008-05-16
NGMN (Next Generation Mobile Networks)
Approved by PCG 2008-03-27
OMA (Open Mobile Alliance )
liaison to ensure ease of 3G service deployment
Liaison with OMG for reasons of parallel working
O-RAN Alliance
Provide the framework for GSM ME type certification
agreed Sept 2002
The liaison between 3GPP is intended to correlate what the PAM forum is seeking to achieve with the goals of the 3GPP within the framework of the 3rd Generation mobile environment
To ensure the timely development of SIM security certificates.
To extend the areas in which MExE can be applied.
Development of APIs for MExE.
Steering Comittee of the Cooperation Platform for the Separate Sale of Roaming Services in the European Union.
To investigate possible enhancements to the existing 3GPP data synchronization solution
Approved by PCG 2005-11-21
To facilitate exchange and use of documents related to the area of Telecom Management.
TETRA Association
Liaison with TIA/TR45 engineering committees to ensure interworking between 3GPP and 3GPP2 solutions.
Use of VXML by mobile handsets.
To enable 3GPP to provide their comments on documents being prepared within the Wi-Fi Alliance.
To establish closer cooperation on WLAN interworking with existing infrastructures.
Future Mobile Networks and Vertical Industries
Liaison on future use of MExE.
To ensure compatibility of and interoperability of 3GPP systems with broadband wireless access networks (IEEE 802.16). Agreed PCG#15.
(The) Parlay Group
Liaison with the PARLAY GROUP for reasons of parallel working