宽带无线网中的一种动态带宽分配方案

在宽带的多媒体无线网中,合理地对各种业务进行带宽的分配是一个非常重要的问题。本文提出了一种适用于宽带无线网越区切换时的动态带宽预留方案。该方案在分配带宽时,给于切换连接比新发连接更高的优先级。对于实时性的切换连接,在小区内进行了带宽预留,当实时的宽带业务切换连接到达时,若无带宽可用,还可以借用非实时业务所占的带宽。文中对所提出的方案进行了计算机仿真。仿真结果显示,切换连接的阻塞率明显小于新发连接;同时,与传统预留方案相比,该方案能够大幅度降低宽带业务的切换连接阻塞率。

An adaptive handoff scheme in broadband wireless network

In this paper,a new adaptive-bandwidth-reservation scheme for handoff in the broadband wireless network is presented. In this scheme,For a realtime new calls,bandwidth is reserved in the cell's neighboring cells in this scheme,and when a realtime broadband handoff call arrives and no bandwidth available, it can borrow bandwidth from existing nonrealtime connections. The performance of the proposed scheme is evaluated through simulation, the results show that the proposed scheme provides small handoff blocking probability than the new call blocking probability; at the same time, contrasting to the general bandwidth - reservation scheme, this scheme can provide smaller handoff blocking probability for broadband traffic.