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

近年来，无线网络界对限制干扰的自组织网络越来越感兴趣。结果表明，网络中节点的空间配置和介质接入策略是最重要的，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，空间上的干扰泄漏是无法设计的。因此，实际空间配置显著影响网络性能。这一事实导致了名为“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]。在这里，空间过程被用来模拟节点的随机位置。通过这种方法，通过选择合适的空间模型来取代来自未知空间构型的自由度。该领域的研究成果主要是假设了一个简化的网络模型，该模型中媒介接入是非协调的，传输是非合作的。本提案旨在通过研究媒介接入的协调以避免过多的干扰和使用中继或网络编码的合作，以扩大干扰限制的自组织网络的覆盖和吞吐量，从而扩展这一研究领域。在这个项目中，必须通过随机几何来建模和分析干扰有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，因此，无处不在的协调与合作策略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.