| 摘要: |
| 在基于位置的协作过程中,用户分散在协作区域的不同位置,及时了解协作区域各个位置的上下文对协作的顺利进行具有很重要的影响.因此,用户在使用交互协作系统进行信息交互时,必须考虑到用户的发言权在空间上的公平性,使得协作区域中不同位置的用户均有公平的机会报告本地的上下文变化.而现有的发言权控制策略没有考虑发言权在空间上的公平性.首先,提出了发言权四叉树记录历史发言权分配的空间分布情况,并据此构建了发言指数判断用户发言权请求的空间优先权.然后,提出了一种基于空间公平的发言权请求排序算法,并把这种算法应用到发言权混合 |
| 关键词: 基于位置的协作 空间公平性 混合 发言权控制 |
| DOI： |
| 分类号: |
| 基金项目:Supported by the Shanghai Research Programs of China under Grant No.035115038 (上海市科技公关项目) |
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| A Spatial Fairness Based Fuzzy Floor Control Policy in Location-Aware Collaborative Environment |
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CUI Xiu-Tao,Lü Zhao,GU Jun-Zhong,XUE Mei
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| Abstract: |
| The environment changes of the each part of the cooperative region are the key contexts for location-based collaboration. It’s important for users in different parts to have a spatial-fair opportunity to use shared resources such as communication channels in location-based collaborative system. So the floor control policy must consider the spatial fairness. Firstly, a floor quad-tree is put forward to record the spatial distribution of historical floor assignment and then floor index is constructed to judge the spatial priority of users’ floor requests. Secondly, a spatial fairness based floor sorting algorithm is proposed to sort the floor requests. Finally, a spatial fairness based fuzzy floor control policy is presented and verified by simulation. The conclusion is that the policy can reduce the spatial unfairness of floor-assignment times and longest-waiting time. |
| Key words: location based collaboration spatial fairness fuzzy floor control |
