移动的代价：无线通信有线化

[摘要] 采用无线覆盖的距离来定义用户的移动性，并以香农信息论为基础，提出了无线通信的移动性代价模型。移动性代价模型的主要意义在于：揭示了移动距离、通信容量和资源代价之间的转换关系。按照这个模型，可以得出3个主要结论：无线资源的消耗与距离有关，应当建立合理的通信计费机制；系统容量与覆盖距离可以相互转化，从而改变系统容量对频谱资源的依赖关系；以短覆盖距离为特征的无线通信有线化将成为提高系统容量的主要方向。

[关键词] 移动性；频率资源；信道容量；代价函数

[Abstract] A user’s mobility depends on the wireless coverage distance. In this paper, we propose a mobility cost model based on Shannon Theory. With this model, we can determine the relationship between mobile distance, communication capacity, and resource cost. We conclude that wireless resource consumption is affected by distance, and a communication billing system should be established. We also conclude that system capacity can be transformed into coverage distance, and vice versa. This reduces the dependence of system capacity on spectrum resources. Short-distance wireless coverage can greatly increase system capacity.

[Keywords] mobility;frequency resource;channel capacity;cost function