A Novel Scheme for Resource Allocation for Multimedia Wireless Networks

Abstract

The third generation (3G) wireless communication systems will support multimedia traffic at a target transmission rate of up to 2 Mbps for static mobile users and 384 kbps for high mobility users. Unlike wired networks, communication entities in wireless networks change their connectivity via handoff when they move from one cell to another. The use of micro or pico-sized cells makes the role of handoff procedures very important in maintaining the service continuity and QoS guarantees to the multimedia applications. Admission control and bandwidth allocation schemes can offer wire line networks the ability to provide these guarantees. Due to host mobility, scarcity of bandwidth, and an assortment of channel impairments, the QoS provisioning is far more challenging in wireless networks than in wire line networks.This paper proposes a novel scheme for resource allocation that attempts to allocate the desired bandwidth to all the multimedia connections whether it is new connection or handoff. This is different from the rate based borrowing scheme in the sense that it does not have a reserve pool of bandwidth in the cell for Class I connections, but it reserves bandwidth in all the neighboring cells dynamically when a new connection arrives in a cell. There is a limit on the amount of bandwidth that can be reserved in a cell.Extensive simulation results show that the proposed scheme performs better than the previous known schemes in terms of bandwidth utilization, call blocking probability and call dropping probability.