Multimedia telephony over IP Multimedia Subsystem (IMS); Study on improved end-to-end Quality of Service (QoS) handling for Multimedia Telephony Service for IMS (MTSI)
TS 26.114 define media handling and interaction for the Multimedia Telephony Service for IMS (MTSI) including mechanisms for the negotiation of bandwidth using the SDP bandwidth modifiers. The present study investigates potential improvements for the end-to-end QoS handling with the purpose to improve the network resource allocation for variable bit-rate codecs, rate-adaptive codecs and asymmetric sessions (i.e. different bitrates for different directions). The study will focus on SDP extensions and the interaction with the policy control.
The present document:
- 1 – Identifies high-level use cases
- 2 – Evaluates for these use cases the current limitations and the expected benefits
- 3 – Establishes recommended high-level functional requirements and related recommended technical requirements
- 4 – Discusses potential solutions
- 5 – Studies impact of potential solutions on networks and terminals