Quality of service for SIP sessions in 3GPP-based networks

Abstract

This letter addresses how quality of service (QoS) for Session Initiation Protocol (SIP)‐based multimedia sessions can be realized within the 3rd Generation Partnership Project (3GPP) architecture. It discusses a scenario for voice over IP (VoIP) to illustrate how relevant QoS mechanisms and signaling protocols such as SIP, Media Gateway Control Protocol (H.248/Megaco), and the Common Open Policy Service (COPS) interact. Related aspects of the Universal Mobile Telecommunications System (UMTS) access network and the IP Multimedia Subsystem (IMS) are explained. © 2004 Lucent Technologies Inc.

Review of quality of service performance in wireless LANs and 3G multimedia application services

“…QoS signalling is used to provision and enforce QoS parameters between endpoints and is handled in the application layer, network layer and link layer. The Session Initiation Protocol (SIP) [20] is used as the application level signalling protocol to establish sessions while the Session Description Protocol (SDP) [21] parameters are carried as part of the SIP payload, and contain session specific information.…”