Cooperative REceive-DIversiTy in Wireless Networks:A Stochastic Geometry Approach

近年来，干扰受限自组网在无线网络领域得到了越来越多的关注。事实证明，网络中节点的空间配置和媒体访问策略是主要关注的问题，因为它们决定了网络中的干扰情况。这是因为，与时间和频率上的干扰相比，空间中的干扰泄漏是无法设计的。因此，实际的空间配置对网络性能有很大的影响。这一事实导致了被称为“用于分析和设计无线自组织网络的随机几何”的研究框架[1]。这里，空间过程被用来对节点的随机位置进行建模。通过这种方式，来自未知空间构型的自由度被适当的空间模型的选择所取代。该研究领域的研究成果主要是假设一个简化的网络模型，在该模型中，媒体接入是非协调的，传输是非合作的，该方案旨在通过研究媒体接入的协调来避免过度干扰以及在干扰受限的自组网中利用中继或网络编码来合作以增加覆盖和吞吐量来扩展这一研究领域。在这个项目中，必须用随机几何的方法来建模和分析干扰受限的自组织网络中协调与合作的影响，因为不需要假设特定的网络拓扑结构，从而使得协调与合作策略的无处不在的基准测试成为可能。

Recently, interference-limited ad hoc networks gained increasing interest in the wireless network community. It turns out that the spatial configuration of nodes in the network and the medium access strategy are of primary concern, since they are determining the interference situation in the network. This is because, in contrast to interference in time and frequency, interference leakage in space cannot be engineered [3]. Thus, the actual spatial configuration significantly influences network performance.This fact resulted in the research framework called “Stochastic geometry for the analysis and the design of wireless ad hoc networks” [1]. Here, spatial processes are used to model the random locations of nodes. By this, the degree of freedom coming from the unknown spatial configuration is replaced by the choice of an appropriate spatial model. Results in this research field were mainly assuming a simplified network model, in which medium access is uncoordinated and transmissions are noncooperative.This proposal aims at extending this research field by studying coordination of medium access to avoid excessive interference and cooperation using relaying or network coding in order to increase coverage and throughput in interference-limited ad hoc networks. In this project, it is mandatory to model and to analyze the effects of coordination and cooperation in interference-limited ad hoc networks by means of stochastic geometry, since no specific network topology must be assumed and, hence, ubiquitous benchmarking of coordination and cooperation strategies becomes possible.