| 摘要: |
| 提出了一种基于动态阈值的保护信道(guard channel,简称GC)方案.该方案的目标是使新增连接和切换连接的阻塞率保持一定的比例关系,从而保证连接之间的优先级和公平性,同时优化和改善了越区切换的性能指标:切换连接的阻塞率、新增连接的阻塞率以及系统资源的利用率.此外,算法的自调节特性使系统能够适应负载的动态变化,保证了阻塞率的平稳性.最后,分析与模拟的结果证明了该方案的可行性. |
| 关键词: 保护信道 越区切换 无线网络 |
| DOI： |
| 分类号: |
| 基金项目:(Supported by the National Natural Science Foundation of China under Grant Nos.90104002, 60173012 (国家自然科学基金); the National High-Tech Research and Development Plan of China under Grant No.2001AA112080 (国家高技术研究发展计划(863)); the National Grand Fundamental Research 973 Program of China under Grant No.G1999032707 (国家重点基础研究发展规划(973)); the Special Research Foundation of Ph.D. Study in University under Grant No.20020003027 (高等学校博士学科点专项科研基金) |
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| A Dynamic Handoff Scheme in Multimedia Wireless Networks |
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WEI Ya-Ya,LIN Chuang,REN Feng-Yuan,FU Qiang
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| Abstract: |
| In this paper, a Guard Channel (GC) scheme based on dynamic thresholds is proposed. It keeps the ratio of new connection blocking probability to handoff connection blocking probability to a predefined value, which guarantees the priority and fairness among connections. At the same time, it optimizes and improves the performance metrics for handoff: new connection blocking probability and handoff connection blocking probability and system utilization. In addition, the algorithm adopts self-adjusting to be adaptive to varying traffic loads and makes the blocking probability smoother. Lastly the results by analysis and simulation prove the feasibility of this scheme. |
| Key words: guard channel handoff wireless network |
