QoS oriented bandwidth management scheme for stable multimediaservices on the IMT-2000 networks

摘要

We propose a bandwidth management scheme to efficiently guaranteethe QoS of various services on IMT-2000 networks. The proposed bandwidthmanagement scheme consists of the call admission control based on theguard channel and the time slot scheduling in wireless links. For thecall admission control the preemption and deprivation method are used toovercome the problems in the previous guard channel scheme. The proposedtime slot scheduling scheme allocates time slots based on the QoSrequirements of each user. The time slots are dynamically scheduled byconsidering the current traffic conditions with the DQRUMA protocol. Thesimulation results show that the proposed bandwidth scheme has betterperformance than the previous works in terms of the handoff failureprobability and the packet delay time