Random Linear Multihop Relaying in a General Field of Interferers Using Spatial Aloha
Random Linear Multihop Relaying in a General Field of Interferers Using Spatial Aloha
复制标题
使用空间 Aloha 在一般干扰场中进行随机线性多跳中继
DOI：
10.1109/twc.2015.2409845
复制
发表时间：
2012
影响因子：
10.4
通讯作者：
P. Mühlethaler
中科院分区：
文献类型：
--
作者：
B. Błaszczyszyn;P. Mühlethaler
在我们的基本模型中，我们研究了嵌入干扰节点的独立平面泊松场中的直线上节点的稳定泊松图案。在假设时隙ALOHA和信干噪比捕获条件下，结合通常的幂函数路径损耗模型和瑞利衰落，我们显式地评估了最近邻分组在该线路上中继的几种局部和端到端的性能特性，并研究了它们对模型参数(中继和干扰节点的密度、ALOHA调谐和外部噪声功率)的依赖关系。我们的模型可以应用于两种情况。第一个用途是车载自组织网络，其中车辆随机放置在一条笔直的道路上。第二个用途是研究通过某种路由机制在(一般)平面自组织网络中跟踪的“典型”路由。我们所选择的方法使我们能够量化“纯自组织”网络中长途路由的无效性，并以额外的“固定”中继节点的形式来评估其可能的补救措施，即车辆网络中的路侧单元。它还允许我们考虑更一般的干扰节点的领域，并研究其节点的分簇对路由性能的影响。作为比泊松场具有更多聚类性的场的特例，我们考虑了一个由干扰节点组成的泊松线场，其中所有节点随机地位于随机直线上。在这种情况下，我们的分析严格地(在Palm理论的意义上)对应于这个网络的典型路线。与基本模型的比较揭示了一个悖论：干扰节点的聚集降低了路由上单个(典型)传输的中断概率，但增加了平均端到端延迟。
In our basic model, we study a stationary Poisson pattern of nodes on a line embedded in an independent planar Poisson field of interfering nodes. Assuming slotted Aloha and the signal-to-interference-and-noise ratio capture condition, with the usual power-law path loss model and Rayleigh fading, we explicitly evaluate several local and end-to-end performance characteristics related to the nearest-neighbor packet relaying on this line, and study their dependence on the model parameters (the density of relaying and interfering nodes, Aloha tuning and the external noise power). Our model can be applied in two cases. The first use is for vehicular ad-hoc networks, where vehicles are randomly located on a straight road. The second use is to study a “typical” route traced in a (general) planar ad-hoc network by some routing mechanism. The approach we have chosen allows us to quantify the non-efficiency of long-distance routing in “pure ad-hoc” networks and evaluate a possible remedy for it in the form of additional “fixed” relaying nodes, called road-side units in a vehicular network. It also allows us to consider a more general field of interfering nodes and study the impact of the clustering of its nodes on the routing performance. As a special case of a field with more clustering than the Poison field, we consider a Poisson-line field of interfering nodes, in which all the nodes are randomly located on random straight lines. In this case, our analysis rigorously (in the sense of Palm theory) corresponds to the typical route of this network. The comparison to our basic model reveals a paradox: clustering of interfering nodes decreases the outage probability of a single (typical) transmission on the route, but increases the mean end-to-end delay.