A DIFFSERV RESOURCE ALLOCATION SCHEME SUPPORTING FAST HANDOFF IN IP-BASED WIRELESS NETWORKS

摘要

The next-generation wireless networks are evolving toward a versatile IP (Internet Protocol) based network that can provide various real-time multimedia services to mobile users. Two major challenges in establishing such a wireless mobile Internet are (a) support of fast handoff and (b) provision of quality of service (QoS) over IP-based wireless access networks. In this paper, a Differentiated Service (DiffServ) resource allocation architecture is proposed for the evolving wireless mobile Internet. The registration-domain-based scheme supports fast handoff by significantly reducing the mobility management signaling. The registration domain is integrated with DiffServ mechanism and provisions QoS guarantee for each service class by domain-based admission control. Furthermore, an adaptive assured service is presented for the stream class of traffic, where resource allocation is adjusted according to the network condition in order to minimize handoff call dropping and new call blocking probabilities.