On Performance Modeling for MANETs Under General Limited Buffer Constraint
On Performance Modeling for MANETs Under General Limited Buffer Constraint
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DOI：
10.1109/tvt.2017.2710099
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发表时间：
2016-09
影响因子：
6.8
通讯作者：
Jia Liu;Yang Xu;Yulong Shen;Xiaohong Jiang;T. Taleb
中科院分区：
文献类型：
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作者：
Jia Liu;Yang Xu;Yulong Shen;Xiaohong Jiang;T. Taleb
了解移动自组网（manet）在实际网络约束下的实际可实现性能，对其在未来高度异构无线网络环境中的应用具有重要意义。本文首次探讨了一般有限缓冲区约束下的manet性能建模，其中每个网络节点维护一个大小为$B_s$的有限源缓冲区来存储其本地生成的数据包，以及一个大小为$B_r$的有限共享中继缓冲区来存储其他节点的中继数据包。基于排队论和生-死链理论，我们首先建立了一个通用的理论框架，以全面描述这种MANET中的源/中继缓冲区占用过程，该框架适用于任何分布式MAC协议和任何导致节点位置均匀分布的稳态移动模型。在这个框架的帮助下，我们推导出几个关键网络性能指标的精确表达式，包括可实现的吞吐量、吞吐量容量和预期的端到端延迟。我们进一步在两种网络场景下进行了案例研究，并提供了相应的理论/仿真结果，以证明我们的理论框架的应用和效率。最后，我们给出了大量的数值结果来说明缓冲区约束对缓冲区受限的MANET性能的影响。
Understanding the real achievable performance of mobile ad hoc networks (MANETs) under practical network constraints is of great importance for their applications in future highly heterogeneous wireless network environments. This paper explores, for the first time, the performance modeling for MANETs under a general limited buffer constraint, where each network node maintains a limited source buffer of size $B_s$ to store its locally generated packets and also a limited shared relay buffer of size $B_r$ to store relay packets for other nodes. Based on the Queuing theory and birth-death chain theory, we first develop a general theoretical framework to fully depict the source/relay buffer occupancy process in such a MANET, which applies to any distributed MAC protocol and any mobility model that leads to the uniform distribution of nodes’ locations in steady state. With the help of this framework, we then derive the exact expressions of several key network performance metrics, including achievable throughput, throughput capacity, and expected end-to-end delay. We further conduct case studies under two network scenarios and provide the corresponding theoretical/simulation results to demonstrate the application as well as the efficiency of our theoretical framework. Finally, we present extensive numerical results to illustrate the impacts of buffer constraint on the performance of a buffer-limited MANET.