Distributed Control Scheme for DiffServ in Heterogeneous Mobile IP Networks

This paper investigates differentiated services in heterogeneous mobile IP networks using a distributed method that supports service differentiation and admission control. Mobility and quality of service (QoS) are becoming more important issues in mobile networks. It is general that the traditional Internet service provides the same level of service to all users. However, new type of services demand better QoS and host mobility according to wireless and Internet technologies have being speedily developed. To satisfy these requirements, we deploy differentiated service (Diffserv) model to provide various demand of new application in heterogeneous mobile IP networks. The operational procedures and cost evaluation schemes for seamless connection during a mobile node (MN) changes its network attachment point are proposed while satisfying its QoS requirement. We present through simulation that our distributed virtual schemes are applied to the admission control of the radio channel then a globally stable state can be maintained without the need for complex centralized radio resource management. Finally, we discuss a distributed service level management scheme that builds on the proposed algorithms to offer continuous service with handoff.