Abstract:
True integration of multimedia services over wired or wireless networks increase the
productivity and effectiveness in today’s networks. IP Multimedia Subsystems are Next
Generation Network architecture to provide the multimedia services over fixed or mobile
networks. This Research work proposes an extended SIP-based QoS Management
architecture for IMS services over underlying IP access networks. To guarantee the endto-end QoS for IMS services in interconnection backbone, SIP based proxy Modules are
introduced to support the QoS provisioning and to reduce the handoff disruption time
over IP access networks. In our approach these SIP Modules implement the combination
of Diffserv and MPLS QoS mechanisms to assure the guaranteed QoS for real-time
multimedia services. To guarantee QoS over access networks, SIP Modules make QoS
resource reservations in advance to provide best QoS to IMS users over heterogeneous
networks. To obtain more reliable multimedia services, our approach allows the use of
SCTP protocol over SIP instead of UDP due to its multi-streaming feature. This
architecture enables QoS provisioning for IMS roaming users to differentiate IMS
network from other common IP networks for transmission of real-time multimedia
services. To validate our approach simulation models are developed on short scale basis.
The results show that our approach yields comparable performance for efficient delivery
of IMS services over heterogeneous IP access networks.
