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Issue No.04 - April (2012 vol.23)
pp: 768-775
Luoyi Fu , Shanghai Jiao Tong University, Shanghai
Yi Qin , Shanghai Jiao Tong University and Xidian University, Shanghai
Xinbing Wang , Shanghai Jiao Tong University, Shanghai
Xue Liu , McGill University, Montreal
ABSTRACT
This paper investigates throughput and delay based on a traffic pattern, called convergecast, where each of the n nodes in the network acts as a destination with k randomly chosen sources corresponding to it. Adopting Multiple-Input-Multiple-Output (MIMO) technology, we devise two many-to-one cooperative schemes under convergecast for both static and mobile ad hoc networks (MANETs), respectively. We call them Convergimo Schemes. In static networks, our Convergimo scheme highly utilizes hierarchical cooperation MIMO transmission. This feature overcomes the bottleneck which hinders convergecast traffic from yielding ideal performance in traditional ad hoc network, by turning the originally interfering signals into interference-resistant ones. It helps to achieve an aggregate throughput up to \Omega (n^{1-\epsilon }) for any \epsilon >0. In the mobile ad hoc case, our Convergimo scheme characterizes on joint transmission from multiple nodes to multiple receivers. With optimal network division where the number of nodes per cell is constantly bounded, the achievable per-node throughput can reach \Theta (1) with the corresponding delay reduced to \Theta (k). The gain comes from the strong and intelligent cooperation between nodes in our scheme, along with the maximum number of concurrent active cells and the shortest waiting time before transmission for each node within a cell. This increases the chances for each destination to receive the data it needs with minimum overhead on extra transmission. Moreover, our converge-based analysis well unifies and generalizes previous work since the results derived from convergecast in our schemes can also cover other traffic patterns. Last but not the least, our schemes are of interest not only from a theoretical perspective but also provide useful theoretical guidelines to future design of MIMO schemes in wireless networks.
INDEX TERMS
Convergecast, throughput, delay, MIMO.
CITATION
Luoyi Fu, Yi Qin, Xinbing Wang, Xue Liu, "Throughput and Delay Analysis for Convergecast with MIMO in Wireless Networks", IEEE Transactions on Parallel & Distributed Systems, vol.23, no. 4, pp. 768-775, April 2012, doi:10.1109/TPDS.2011.194
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