SS

Supplementary Services

Services
Introduced in Rel-4
Supplementary Services (SS) are a set of advanced telephony features that enhance the basic call capabilities in circuit-switched mobile networks (GSM, UMTS) and IMS. They include services like Call Forwarding, Call Barring, Call Waiting, Call Hold, and Calling Line Identification Presentation/Restriction. SS are fundamental to providing a rich and customizable user experience beyond simple two-party voice calls.

Description

Supplementary Services (SS) represent a comprehensive portfolio of value-added telephony features defined in 3GPP standards that operate in conjunction with the basic telecommunication service, which is primarily the establishment and maintenance of a two-party voice call. They are a cornerstone of traditional circuit-switched (CS) mobile networks like GSM and UMTS, and their principles and many specific services have been carried forward into the IP Multimedia Subsystem (IMS) for VoLTE and VoNR. SS modify, supplement, or restrict the basic call in some way to provide users with greater control, privacy, and functionality.

Architecturally, in classic GSM/UMTS CS networks, Supplementary Services are managed by the Home Location Register (HLR) and executed by the Mobile Switching Center (MSC) or Visitor Location Register (VLR). The HLR stores the subscriber's SS subscription data, including which services are allowed and their specific parameters (e.g., the forward-to number for Call Forwarding Unconditional). When a subscriber registers with a network, this data is transmitted to the VLR serving that subscriber. The MSC/VLR then applies the logic for these services during call setup and in-call phases. Signaling for SS activation, deactivation, and interrogation uses the Mobile Application Part (MAP) protocol between HLR and VLR, and DTMF tones or unstructured Supplementary Service Data (USSD) codes are often used for subscriber interaction.

In the IMS domain for VoLTE/VoNR, Supplementary Services are implemented using SIP (Session Initiation Protocol) methods and event packages, aligning with the IP-based nature of IMS. The service logic often resides in an Application Server (AS) within the IMS core. For example, a Call Forwarding service in IMS would be handled by a SIP AS that intercepts INVITE requests, checks the subscriber's forwarding rules, and potentially redirects the call. The traditional CS-style SS are mapped to equivalent IMS communication services, ensuring feature parity and smooth migration for subscribers. The management of SS settings in IMS can be done via Ut interface (using XCAP protocol) allowing a user to configure services via a web portal.

The operation of a specific Supplementary Service involves a well-defined state model and procedures. Taking Call Waiting as an example: when a subscriber (User B) is engaged in an active call and a new incoming call arrives, the MSC (or IMS AS) determines that Call Waiting is active for User B. Instead of rejecting the new call with a busy signal, the MSC/AS applies call waiting tone to the existing connection and sends a notification (e.g., a SIP re-INVITE with alert-info header) to User B's UE. The UE then provides an indication to the user, who can choose to place the first call on hold and answer the second one, invoking the Call Hold supplementary service. This demonstrates how multiple SS can interact to create a complex user experience. Another critical category is Call Barring, which includes services like Barring of All Outgoing Calls (BAOC) or Barring of Incoming Calls When Roaming (BIC-Roam), which are crucial for security and cost control, especially in roaming scenarios.

Purpose & Motivation

Supplementary Services were created to transform the mobile phone from a simple wireless voice pipe into a sophisticated personal communications tool, matching and eventually surpassing the feature set of the fixed-line telephone network (PSTN/ISDN). The basic telecommunication service only provides connection establishment and voice transmission. SS add the intelligence and user control necessary for practical daily use, such as managing multiple calls, protecting privacy, and customizing call handling based on time or caller identity.

Historically, the development of SS in GSM (starting from Phase 1 and greatly expanded in Phase 2) was driven by the need for standardization across different operators and countries to enable seamless roaming and interoperability. Without standardized SS, a feature like Call Forwarding might work in a subscriber's home network but fail when roaming, leading to a fragmented user experience. The 3GPP specifications provided a common set of features, protocols, and interfaces, ensuring that a service like Calling Line Identification Presentation (CLIP) would work consistently regardless of the visited network.

Furthermore, SS became a significant source of revenue and differentiation for operators. They could offer tiered service packages, charging extra for advanced features like multi-party conferencing or explicit call transfer. They also provided essential tools for subscribers: Call Barring services allowed parents to control children's phone usage or businesses to manage employee calling privileges. Call Forwarding enabled "follow-me" functionality. As networks evolved to IMS and VoIP, it was imperative to preserve this rich set of features to ensure user acceptance of new technology. Therefore, a major design goal for IMS was to support equivalent or enhanced Supplementary Services, solving the problem of feature regression when migrating from CS voice to VoLTE/VoNR, thereby protecting both the user experience and the operator's service revenue.

Key Features

  • A standardized set of advanced call features including Call Forwarding (Unconditional, Busy, No Reply), Call Barring (outgoing, incoming, when roaming), Call Waiting, Call Hold
  • Calling Line Identification Presentation (CLIP) and Restriction (CLIR) for caller ID management
  • Multi-Party Communication (Conferencing) service to establish calls with more than two parties
  • Explicit Call Transfer (ECT) allowing a user to transfer an established call to a third party
  • Closed User Group (CUG) enabling creation of private calling groups within a network
  • Implemented in both circuit-switched core (MSC/HLR) and IMS (SIP Application Servers) with defined interworking

Evolution Across Releases

Rel-4 Initial

Introduced a comprehensive set of Supplementary Services for the GSM/UMTS circuit-switched domain as part of the 3GPP standardization. Defined the core architecture with HLR storing subscription data and MSC/VLR executing services. Included fundamental services like Call Forwarding, Call Barring, Call Waiting/Hold, Calling Line Identification, and Multi-Party Communication.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-5

Began the work on mapping and supporting Supplementary Services in the new IP Multimedia Subsystem (IMS) architecture. Defined initial IMS service requirements and the use of SIP for implementing SS features, laying the groundwork for VoLTE.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-6

Enhanced IMS-based Supplementary Services, specifying more detailed SIP procedures for services like Call Hold, Call Waiting, and Conferencing. Introduced the Ut interface using XCAP protocol for user-managed service configuration (e.g., setting call forwarding rules via a web interface).

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-7

Continued refinement of IMS Supplementary Services, including work on service interworking between CS and IMS domains (e.g., for subscribers roaming between networks). Improved support for number portability interactions with SS.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-8

Solidified IMS-based Supplementary Services as a core part of the VoLTE profile. Defined the IMS Communication Service Identifier (ICSI) and IMS Application Reference Identifier (IARI) to identify specific SS applications. Ensured alignment with EPS/SAE architecture.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-9

Enhanced support for emergency calls in conjunction with Supplementary Services (e.g., ensuring barring services do not apply to emergency calls). Further defined service continuity aspects for SS during SRVCC handovers.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-10

Introduced Rich Communication Services (RCS) which builds upon IMS and incorporates enhanced messaging and call features that extend traditional Supplementary Services (e.g., enriched call with content sharing).

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-11

Focused on service centralization and continuity, ensuring Supplementary Services work seamlessly across access technologies (CS, LTE, WiFi) via the IMS SCC architecture. Refined the management and provisioning interfaces.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-12

Enhanced support for Supplementary Services in machine-type communication (MTC) and for enterprise communications. Worked on optimizations for battery-efficient signaling related to SS management.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-13

Further integration of Supplementary Services with VoLTE and ViLTE (Video over LTE) profiles. Specified detailed test cases and performance requirements for IMS-based SS to ensure interoperability.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-14

Extended Supplementary Services concepts to support Mission Critical Push-to-Talk (MCPTT) and other critical communications services over LTE, defining group call and dynamic group management features.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-15

Defined the support and evolution of Supplementary Services for the 5G System and VoNR. Ensured that IMS-based SS work over the 5G Core network, including interactions with network slicing for service-specific slices.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-16

Enhanced 5G IMS Supplementary Services with a focus on integration with new 5G capabilities like network exposure. Worked on advanced calling services for vertical industries as part of 5G phase 2.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-17

Continued evolution for 5G-Advanced, including Supplementary Services for Non-Public Networks (NPN) and industrial IoT scenarios. Explored AI/ML-based enhancements for intelligent call handling features.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-18

Ongoing work within 5G-Advanced on further enriching communication services, potentially integrating traditional SS with immersive media calls and extended reality (XR) applications.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-19

Maintenance and potential introduction of new service features for the evolving 5G and beyond 5G communication landscape, ensuring Supplementary Services remain relevant and powerful.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402
Rel-20

Future-looking evolution, likely focusing on the integration of communication services with AI-driven networks, advanced privacy features, and support for novel use cases in the 6G exploration timeframe.

TS 21.905TS 23.110TS 24.167TS 24.424TS 24.623TS 25.171TS 25.172TS 25.173TS 25.221TS 25.302TS 26.130TS 26.131TS 26.132TS 26.253TS 26.260TS 28.309TS 28.518TS 28.541TS 28.606TS 28.616TS 28.622TS 28.623TS 28.626TS 28.629TS 28.653TS 28.656TS 28.659TS 28.662TS 28.663TS 28.669TS 28.673TS 28.676TS 28.706TS 28.709TS 28.733TS 28.736TS 29.007TS 29.332TS 29.412TS 29.424TS 31.111TS 31.121TS 31.829TS 32.101TS 32.102TS 32.103TS 32.111TS 32.150TS 32.153TS 32.154TS 32.300TS 32.302TS 32.303TS 32.306TS 32.307TS 32.311TS 32.312TS 32.313TS 32.316TS 32.317TS 32.323TS 32.326TS 32.343TS 32.346TS 32.347TS 32.353TS 32.356TS 32.363TS 32.366TS 32.367TS 32.373TS 32.376TS 32.393TS 32.396TS 32.401TS 32.413TS 32.416TS 32.417TS 32.443TS 32.446TS 32.506TS 32.507TS 32.523TS 32.526TS 32.602TS 32.603TS 32.606TS 32.607TS 32.613TS 32.616TS 32.617TS 32.622TS 32.623TS 32.626TS 32.643TS 32.646TS 32.652TS 32.653TS 32.656TS 32.662TS 32.663TS 32.666TS 32.667TS 32.673TS 32.676TS 32.713TS 32.716TS 32.722TS 32.723TS 32.726TS 32.733TS 32.736TS 32.743TS 32.746TS 32.753TS 32.756TS 32.763TS 32.766TS 32.773TS 32.776TS 32.783TS 32.786TS 32.792TS 32.796TS 32.808TS 32.818TS 32.824TS 32.832TS 32.866TS 32.880TS 34.109TS 34.114TS 34.229TS 36.171TS 36.509TS 36.579TS 37.171TS 37.355TS 37.544TS 37.571TS 37.579TS 37.901TS 37.910TS 37.911TS 37.976TS 37.977TS 38.101TS 38.104TS 38.151TS 38.161TS 38.171TS 38.212TS 38.214TS 38.300TS 38.321TS 38.508TS 38.509TS 38.521TS 38.523TS 38.551TS 38.561TS 38.741TS 38.761TS 38.762TS 38.810TS 38.817TS 38.834TS 38.852TS 38.853TS 38.863TS 38.870TS 38.873TS 38.884TS 41.033TS 43.901TS 51.010TS 52.402

Defining Specifications

SpecificationTitle
TS 21.905 3GPP TS 21.905
TS 23.110 3GPP TS 23.110
TS 24.167 3GPP TS 24.167
TS 24.424 3GPP TS 24.424
TS 24.623 3GPP TS 24.623
TS 25.171 3GPP TS 25.171
TS 25.172 3GPP TS 25.172
TS 25.173 3GPP TS 25.173
TS 25.221 3GPP TS 25.221
TS 25.302 3GPP TS 25.302
TS 26.130 3GPP TS 26.130
TS 26.131 3GPP TS 26.131
TS 26.132 3GPP TS 26.132
TS 26.253 3GPP TS 26.253
TS 26.260 3GPP TS 26.260
TS 28.309 3GPP TS 28.309
TS 28.518 3GPP TS 28.518
TS 28.541 3GPP TS 28.541
TS 28.606 3GPP TS 28.606
TS 28.616 3GPP TS 28.616
TS 28.622 3GPP TS 28.622
TS 28.623 3GPP TS 28.623
TS 28.626 3GPP TS 28.626
TS 28.629 3GPP TS 28.629
TS 28.653 3GPP TS 28.653
TS 28.656 3GPP TS 28.656
TS 28.659 3GPP TS 28.659
TS 28.662 3GPP TS 28.662
TS 28.663 3GPP TS 28.663
TS 28.669 3GPP TS 28.669
TS 28.673 3GPP TS 28.673
TS 28.676 3GPP TS 28.676
TS 28.706 3GPP TS 28.706
TS 28.709 3GPP TS 28.709
TS 28.733 3GPP TS 28.733
TS 28.736 3GPP TS 28.736
TS 29.007 3GPP TS 29.007
TS 29.332 3GPP TS 29.332
TS 29.412 3GPP TS 29.412
TS 29.424 3GPP TS 29.424
TS 31.111 3GPP TR 31.111
TS 31.121 3GPP TR 31.121
TS 31.829 3GPP TR 31.829
TS 32.101 3GPP TR 32.101
TS 32.102 3GPP TR 32.102
TS 32.103 3GPP TR 32.103
TS 32.111 3GPP TR 32.111
TS 32.150 3GPP TR 32.150
TS 32.153 3GPP TR 32.153
TS 32.154 3GPP TR 32.154
TS 32.300 3GPP TR 32.300
TS 32.302 3GPP TR 32.302
TS 32.303 3GPP TR 32.303
TS 32.306 3GPP TR 32.306
TS 32.307 3GPP TR 32.307
TS 32.311 3GPP TR 32.311
TS 32.312 3GPP TR 32.312
TS 32.313 3GPP TR 32.313
TS 32.316 3GPP TR 32.316
TS 32.317 3GPP TR 32.317
TS 32.323 3GPP TR 32.323
TS 32.326 3GPP TR 32.326
TS 32.343 3GPP TR 32.343
TS 32.346 3GPP TR 32.346
TS 32.347 3GPP TR 32.347
TS 32.353 3GPP TR 32.353
TS 32.356 3GPP TR 32.356
TS 32.363 3GPP TR 32.363
TS 32.366 3GPP TR 32.366
TS 32.367 3GPP TR 32.367
TS 32.373 3GPP TR 32.373
TS 32.376 3GPP TR 32.376
TS 32.393 3GPP TR 32.393
TS 32.396 3GPP TR 32.396
TS 32.401 3GPP TR 32.401
TS 32.413 3GPP TR 32.413
TS 32.416 3GPP TR 32.416
TS 32.417 3GPP TR 32.417
TS 32.443 3GPP TR 32.443
TS 32.446 3GPP TR 32.446
TS 32.506 3GPP TR 32.506
TS 32.507 3GPP TR 32.507
TS 32.523 3GPP TR 32.523
TS 32.526 3GPP TR 32.526
TS 32.602 3GPP TR 32.602
TS 32.603 3GPP TR 32.603
TS 32.606 3GPP TR 32.606
TS 32.607 3GPP TR 32.607
TS 32.613 3GPP TR 32.613
TS 32.616 3GPP TR 32.616
TS 32.617 3GPP TR 32.617
TS 32.622 3GPP TR 32.622
TS 32.623 3GPP TR 32.623
TS 32.626 3GPP TR 32.626
TS 32.643 3GPP TR 32.643
TS 32.646 3GPP TR 32.646
TS 32.652 3GPP TR 32.652
TS 32.653 3GPP TR 32.653
TS 32.656 3GPP TR 32.656
TS 32.662 3GPP TR 32.662
TS 32.663 3GPP TR 32.663
TS 32.666 3GPP TR 32.666
TS 32.667 3GPP TR 32.667
TS 32.673 3GPP TR 32.673
TS 32.676 3GPP TR 32.676
TS 32.713 3GPP TR 32.713
TS 32.716 3GPP TR 32.716
TS 32.722 3GPP TR 32.722
TS 32.723 3GPP TR 32.723
TS 32.726 3GPP TR 32.726
TS 32.733 3GPP TR 32.733
TS 32.736 3GPP TR 32.736
TS 32.743 3GPP TR 32.743
TS 32.746 3GPP TR 32.746
TS 32.753 3GPP TR 32.753
TS 32.756 3GPP TR 32.756
TS 32.763 3GPP TR 32.763
TS 32.766 3GPP TR 32.766
TS 32.773 3GPP TR 32.773
TS 32.776 3GPP TR 32.776
TS 32.783 3GPP TR 32.783
TS 32.786 3GPP TR 32.786
TS 32.792 3GPP TR 32.792
TS 32.796 3GPP TR 32.796
TS 32.808 3GPP TR 32.808
TS 32.818 3GPP TR 32.818
TS 32.824 3GPP TR 32.824
TS 32.832 3GPP TR 32.832
TS 32.866 3GPP TR 32.866
TS 32.880 3GPP TR 32.880
TS 34.109 3GPP TR 34.109
TS 34.114 3GPP TR 34.114
TS 34.229 3GPP TR 34.229
TS 36.171 3GPP TR 36.171
TS 36.509 3GPP TR 36.509
TS 36.579 3GPP TR 36.579
TS 37.171 3GPP TR 37.171
TS 37.355 3GPP TR 37.355
TS 37.544 3GPP TR 37.544
TS 37.571 3GPP TR 37.571
TS 37.579 3GPP TR 37.579
TS 37.901 3GPP TR 37.901
TS 37.910 3GPP TR 37.910
TS 37.911 3GPP TR 37.911
TS 37.976 3GPP TR 37.976
TS 37.977 3GPP TR 37.977
TS 38.101 3GPP TR 38.101
TS 38.104 3GPP TR 38.104
TS 38.151 3GPP TR 38.151
TS 38.161 3GPP TR 38.161
TS 38.171 3GPP TR 38.171
TS 38.212 3GPP TR 38.212
TS 38.214 3GPP TR 38.214
TS 38.300 3GPP TR 38.300
TS 38.321 3GPP TR 38.321
TS 38.508 3GPP TR 38.508
TS 38.509 3GPP TR 38.509
TS 38.521 3GPP TR 38.521
TS 38.523 3GPP TR 38.523
TS 38.551 3GPP TR 38.551
TS 38.561 3GPP TR 38.561
TS 38.741 3GPP TR 38.741
TS 38.761 3GPP TR 38.761
TS 38.762 3GPP TR 38.762
TS 38.810 3GPP TR 38.810
TS 38.817 3GPP TR 38.817
TS 38.834 3GPP TR 38.834
TS 38.852 3GPP TR 38.852
TS 38.853 3GPP TR 38.853
TS 38.863 3GPP TR 38.863
TS 38.870 3GPP TR 38.870
TS 38.873 3GPP TR 38.873
TS 38.884 3GPP TR 38.884
TS 41.033 3GPP TR 41.033
TS 43.901 3GPP TR 43.901
TS 51.010 3GPP TR 51.010
TS 52.402 3GPP TR 52.402