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Theoretical Studies on the Service Quality Evaluation and Optimal Resource Allocation in Mobile Communication Networks

移动通信网络服务质量评价与资源优化配置的理论研究

基本信息

批准号：
18500045
负责人：
TAKAGI Hideaki
金额：
$ 1.32万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18500045/
关键词：
Information networks Mobile radio networks Queues

项目摘要

(1) Methodology for calculating the requires spectrum for the next generation mobile radio communication systems Our proposal of the methodology and calculation results for estimating the spectrum requirements in IMT-Advanced systems was approved and accepted in the 2007 World Radiocommunication Conference. We have published the technical background and our research work in a book entitled Spectrum Requirement Planning in Wireless Communications from John Wiley and Sons (248 pages), 2008. Afterwards, we have developed a method that improves the spectrum usage, and calculated its effects based on a queuing model and simulation.(2) Calculation of the number of handovers and its application in cellular mobile communication networks In cellular mobile communication systems, the handover control is necessary when a mobile terminal moves from one cell to another for the channel allocation and location management. We have developed a theoretical model for estimating the number of handovers during one communication session using the theories of geometric probability and renewal process. The model has been applied to determine the optimal data update time for location management at the base stations in cellular mobile networks.(3) Models for evaluating the effects of time-varying traffic load on the performance of communication channels. Dynamic allocation of spectrum resource is desirable in future radio communication systems. Therefore, we have studied the time-dependent process in relevant stochastic models. We have also obtained an explicit expression for the probability density function of a busy period duration in a queue with a finite waiting room.

(1)下一代移动无线电通信系统所需频谱的计算方法我们提出的用于估计IMT-Advanced系统频谱需求的方法和计算结果在2007年世界无线电通信大会上获得批准和接受。我们在John Wiley and Sons 2008年出版的名为《无线通信频谱需求规划》（248页）的书中发表了技术背景和我们的研究工作。随后，我们开发了一种提高频谱利用率的方法，并基于排队模型和仿真计算了其效果。在蜂窝移动通信系统中，当移动终端从一个小区移动到另一个小区时，为了进行信道分配和位置管理，需要进行切换控制。我们利用几何概率和更新过程的理论建立了一个理论模型来估计一次通信会话期间的移交次数。将该模型应用于蜂窝移动网络中基站位置管理的最优数据更新时间的确定。(3)时变业务负荷对通信信道性能影响的评价模型。频谱资源的动态分配是未来无线电通信系统所需要的。因此，我们研究了相关随机模型中的时间依赖过程。我们还得到了有限等候室队列中繁忙时段持续时间的概率密度函数的显式表达式。