- Recommendation Q.1701 (03/99) - Framework for IMT-2000 networks
This Recommendation sets out the "family of systems" concept which provides the basis for the development of IMT 2000 standards including the set of signalling requirements for IMT 2000. It also contains a description of the interfaces in the system which may need to be standardized by the ITU. It has been agreed that the development of IMT 2000 requirements will be performed in Capability Sets and this Recommendation sets out the contents of Capability Set 1 and the vision for subsequent Capability Sets.
- Recommendation Q.1711 (03/99) - Network functional model for IMT-2000
This Recommendation identifies network and terminal functions that are specific for the support of IMT 2000 services, as specified in the Recommendation on the Framework for IMT 2000 Networks (Recommendation Q.1701). These functions together with other, more conventional network functions are then grouped into functional entities in a generic functional model. In the functional model, the relationships among functional entities and groups are shown.
The functional model is mapped onto a generic network reference model to illustrate possible groupings of functional entities into physical collections of entities.
Based on the functional model, global roaming requirements and network interconnection scenarios are described.
This Recommendation forms the basis for the development of information flows and the definition of functional entity actions and the development of signalling requirements for the various interfaces identified in Recommendation Q.1701.
- Recommendation Q.1721 (06/00) - Information flows for IMT-2000 capability set 1
This Recommendation specifies Stage 2 information flow procedures for the support of end-to-end inter-family and inter-system IMT-2000 Capability Set 1 (CS-1) services and network capabilities. The areas covered are mobility management, call and bearer control, services control, and over the air authorization services.
- Recommendation Q.1731 (06/00) - Radio-technology independent requirements for IMT-2000 layer 2 radio interface
This Recommendation defines requirements for common services, functions and primitives for the radio-technology independent parts of the Layer 2 of the IMT-2000 radio interface, to ensure maximum commonality between IMT-2000 family members
- Recommendation Q.1751 (06/00) - Internetwork signaling requirements for IMT-2000 capability set 1
This ITU-T Recommendation contains signaling requirements for the Network-to-Network Interface (NNI) protocol. The requirements are to support the capabilities that are recommended in the IMT 2000 Framework document and specified as Capability Set 1 (CS-1). This ITU-T Recommendation covers requirements for four communication groups of the NNI: Call and Bearer Control; Mobility Management; Virtual Home Environment (VHE) Service Control; and Packet Data Services and Internet Access Control. The requirements for inter-network security are described at a high level, and its functionality is incorporated into applicable communications group protocols. The requirements specified in this ITU-T Recommendation are non-information flow related, and they should be viewed as complementary to the information flows of ITU-T Recommendation Q.1721. They include general NNI protocol requirements, NNI functional models, NNI reference points, state models for selective functional entities, and the choice of various protocol suites.
- Recommendation Q.2769.1 (06/00) - Support of number portability information across B-ISUP
This Recommendation provides support for transport of number portability related information across B-ISUP as a transit network.
- Recommendation Q.3203 (08/11) - Signalling requirements and architecture of NACF for IP mobility
Addition of IP mobility in access networks impacts the functionality of network attachment control functions (NACF), and it raises additional signalling requirements of NACF with respect to the mechanism of IP address management and the signalling flows for mobility interface. Generic signalling requirements and architecture are proposed in NACF functionality with considerations of interfacing mobility management functions described in [ITU-T Y.2018].
- Recommendation Q.3610 (05/09) - The signalling requirements and protocol profiles for CRBT services
This Recommendation specifies the signalling requirements and protocol profiles for NGN Customized multimedia Ring Back Tone (CRBT).
