| 摘要: |
| 针对当前大多数位置管理策略的研究都是假设在同大小、同形状、同分布的蜂窝网络下实现的,提出了基于不规则分布的蜂窝网络结构(包括宏蜂窝、微蜂窝、微微蜂窝)的位置管理策略,通过将邻近的蜂窝重组并根据基站广播的蜂窝坐标CC(cell coordinates)计算当前所在蜂窝到当前位置区最后报告所在蜂窝的实际距离,并提出了基于实际距离和方向角的动态位置更新算法.最后,通过半马尔可夫决策过程推导两次寻呼到达间的位置管理总代价计算公式.数值分析结果表明,当移动用户运动特性很强时,选择个性化的扇形位置管理策略在位置更新与寻呼总代价上优于无个性的圆形位置区. |
| 关键词: 位置管理 蜂窝重组 蜂窝坐标 实际距离 |
| DOI： |
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| 基金项目:Supported by the Special Program for the Science and Technology Plan of Zhejiang Province of China under Grant No.2007C13064 (浙江省重大科技专项和优先主题计划项目); the Natural Science Foundation of Zhejiang Province of China under Grant No.Y106113 (浙江省自然科学基金) |
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| Research on Location Management Based on Irregular Cellular Network Topology Model |
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ZHAO Xiao-Min,LANG Mei-Ya,CHEN Qing-Zhang
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| Abstract: |
| Most strategies of location management are based on the hypothesis that the cellular network is regular in size, shape and distribution. This paper proposes a location management strategy based on irregular cellular network topology, including macro-cell, micro-cell and pico-cell. The terminal will compute the physical distance between the current cell and the last reported cell by regrouping neighbor cells and comparing the CCs (cell coordinates) which are broadcasted by each base station. In the paper a dynamic location update algorithm based on distance and direction angle is presented. Finally, the formula for the total cost of location management between two paging arrivals is deduced by a semi-Markov decision process. The numerical analysis shows that the total costs of location updating and paging of individuation sector location management scheme is superior to that of circle location cell when the mobile user moves frequently. |
| Key words: location management cell regrouping cell coordinate physical distance |
