多媒体业务在越区切换中服务质量保证方法的研究

黄倩; 陈惠民

多媒体业务在越区切换中服务质量保证方法的研究

黄倩,
陈惠民

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出版历程
- 收稿日期: 2001-12-17
- 修回日期: 2002-08-02
- 刊出日期: 2003-04-19

Studying on the qos guaranteed method for multimedia traffic handoff

摘要

摘要: 为了降低多媒体业务在移动环境中的呼叫中断率,提高无线信道的利用率,该文提出了一种动态预留带宽分配机制(DRBA),该机制对到达的越区切换呼叫按业务类型区别处理,对于高优先级的实时业务,通过在邻近小区内预留带宽的方法降低呼叫中断率;对于非实时业务,当小区内的信道带宽不足以支持新到达的越区切换呼叫时,通过动态地借用实时业务过度预留的带宽,改善非实时业务的呼叫中断率,进一步达到提高无线信道利用率,为不同的业务类型提供公平的服务质量(QoS)的目标。
- 移动网络; 越区切换; 动态带宽分配
Abstract: A Dynamical Reserved Bandwidth Allocation scheme (DRBA) for handoff in multimedia mobile networks is presented to reduce the call dropping probability and improve the bandwidth utilization. The proposed scheme reserves bandwidth for real-time handoff calls and allows non-real-time handoff calls to borrow the over-booked bandwidth from real-time handoff calls when the free bandwidth is deficient. Simulation results show that reduction in dropping probability and increase in bandwidth utilization are obtained in our proposed DRBA scheme. It also provides fair QoS for different types of services.

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参考文献(1)

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