Congestion in spread spectrum wireless mobile communication networks

A. Shastri
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引用次数: 1

Abstract

This paper surveys some macroscopic measures of congestion that pertain to spread spectrum networks which are used in network control to decide whether or not to admit a call. Such measures reflect the congestion in the region of the network that the call will interact with during its lifetime as opposed to properties of the user itself at call set up time which are of little value due to temporal variance. By developing network-wide measures of congestion for spread spectrum systems, the task of call admissions is much simplified. Three models of spread spectrum which are studied are network of cells employing CDMA, interference cancellation and a macrodiversity model. The most startling result here is that measures of congestion can be given in terms of eigenvalues of matrix defining the network geometry. Though it is a macroscopic quantity, it is measurable by any user or cell site in a decentralized way.
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扩频无线移动通信网络中的拥塞
本文研究了扩频网络中用于决定是否接收呼叫的宏观拥塞度量。这些措施反映了网络区域的拥塞,即调用将在其生命周期内与之交互,而不是用户本身在调用建立时的属性,由于时间变化而没有什么价值。通过开发扩频系统的全网拥塞度量,呼叫接纳的任务大大简化。研究了三种扩频模型:采用CDMA的小区网络、干扰消除模型和宏分集模型。这里最令人吃惊的结果是,拥塞的度量可以用定义网络几何的矩阵的特征值来给出。虽然它是一个宏观的量,但它可以被任何用户或小区站点以分散的方式测量。
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