| 摘要: |
| 提出了一种基于周期自适应的垂直切换算法.在切换发起阶段，移动终端会根据接收信号的强度不断调整接口的激活间隔时间，扫描可能存在的无线信号.在切换判决阶段，采用多属性判决法对每种网络的综合性能进行判断.仿真表明，相比于传统方案中以固定周期扫描无线信号，提出的方案在节省终端功率的基础上能够更及时地发现新的无线网络，并能更快地接入综合性能最好的网络. |
| 关键词: 异构网络 垂直切换 多属性 |
| DOI：10.3969/J.ISSN.1000-5137.2017.04.013 |
| 分类号:TN929.5 |
| 基金项目:国家自然科学基金（61101209）；上海师范大学校级项目（DYL201406） |
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| A vertical handoff scheme based on adaptive period |
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Li Yang, Zhang Jing
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The College of Information Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| This paper presents a periodic adaptive vertical handoff scheme.In the phase of handoff initiation,the mobile terminal will adjust the interfaces activating interval to scan the potential new wireless signals according to the Received Signals Strength.In the phase of handoff decision,multiple attribute judgment method are adopted to judge the comprehensive perfomance of each network.The simulation shows that the proposed scheme can discover new wireless networks access the network that has the best comprehensive performance saving consumed power. |
| Key words: heterogeneous network vertical handoff multiple attribute |
