無(wú)線移動(dòng)多媒體通信網(wǎng)的一種切換策略
A hand-cver policy in wireless mobile multimedia networks
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摘要: 該文提出了無(wú)線移動(dòng)多媒體通信網(wǎng)中基于寬帶呼叫業(yè)務(wù)和窄帶呼叫業(yè)務(wù)的雙向?qū)娱g切換業(yè)務(wù)模型(BLHM)和單向?qū)娱g切換業(yè)務(wù)模型(SLHM),分別研究了兩種業(yè)務(wù)在模型中的新呼叫阻塞概率和切換呼叫失敗概率,對(duì)由于層間切換機(jī)制帶來(lái)的呼叫業(yè)務(wù)質(zhì)量(QoS)下降的寬帶切換呼叫進(jìn)行了定量分析。另外,該文還提出了基于呼叫業(yè)務(wù)代價(jià)函數(shù)和呼叫業(yè)務(wù)QoS的信道分配算法。最后進(jìn)行了計(jì)算機(jī)仿真,將兩種模型的性能進(jìn)行了比較。
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關(guān)鍵詞:
- 多媒體業(yè)務(wù); 無(wú)線移動(dòng)通信網(wǎng); 切換
Abstract: This paper presents two inter-layer hand-over models based on wireless mobile multimedia services including wide-band service and narrow-band service. One is bi-directional inter-layer hand-over model, the other is single-directional inter-layer model. The new call blocking probability and the hand-over call failure probability are analyzed. The QoS degradation of wide-band hand-over calls due to the inter-layer hand-over between macro-cell layer and micro-cell layer is presented in details. Also, an algorithm on channel allocation based on this hand-over policy is described. Finally, analysis and simulation results are compared to testify the hand-over policy submitted above. -
P.J. Goodman, G. P. Pollini, K. S. Meier-Hellstern, Network control for wireless communication,IEEE Comm. Mag., 1992, 30(12), 116-125.[2]W.C.Y. Lee, Smaller cells for greater performance, IEEE Comm. Mag., 1991, 29(11), 19-23.[3]Yi-Bing Li, Anthony R. Noerpel, The sub-rating channel assignment strategy for PCS hand-offs,IEEE Trans. on Veh. Tech., 1996, 45(1), 122-130 .[4]Khaldoun Al Agha.[J].Andre-Luc Beylot, Analysis of the virtual channel borrowing scheme for cellular mobile systems, Globecom98, Sydney, Australia.1998,:-Jinsung Choi.[J].John A. Silvester, Performance of a channel borrowing scheme in multiservice cellular networks with reuse partitioning, Globecom98, Sydney, Australia.1998,:-[5]In-Soo Yoon.[J].Byeong Gi Lee, A distributed dynamic call admission control that supports mobility of wireless multimedia users, ICC99, Vancouver, British Columbia, Canada.1999,:-[6]Fotini-Niovi Pavlidou, Two-dimensionnal traffic models for cellular mobile systems, IEEE Trans.on Comm., 1994, 42(2/3/4), 1505-1511.[7]D. Bertsekas, R. Gallager, Data networks, 2nd ed. Englewood Cliffs, NJ: Prentice-Hall, 1992,166-168. -
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