Energy-efficient multihop cooperative MISO transmission with optimal hop distance in wireless ad hoc networks


In this paper, we investigate the hop distance optimization problem in ad hoc networks where cooperative multiinput- single-output (MISO) is adopted to improve the energy efficiency of the network. We first establish the energy model of multihop cooperative MISO transmission. Based on the model, the energy consumption per bit of the network with high node density is minimized numerically by finding an optimal hop distance, and, to get the global minimum energy consumption, both hop distance and the number of cooperating nodes around each relay node for multihop transmission are jointly optimized. We also compare the performance between multihop cooperative MISO transmission and single-input-single-output (SISO) transmission, under the same network condition (high node density). We show that cooperative MISO transmission could be energyinefficient compared with SISO transmission when the path-loss exponent becomes high. We then extend our investigation to the networks with varied node densities and show the effectiveness of the joint optimization method in this scenario using simulation results. It is shown that the optimal results depend on network conditions such as node density and path-loss exponent, and the simulation results are closely matched to those obtained using the numerical models for high node density cases.

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Divisions: College of Engineering & Physical Sciences > Adaptive communications networks research group
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Uncontrolled Keywords: cooperative MISO,energy efficiency,hop distance,wireless ad hoc networks,Electrical and Electronic Engineering,Computer Science Applications,Applied Mathematics
Publication ISSN: 1558-2248
Last Modified: 12 Jul 2024 07:02
Date Deposited: 09 Mar 2016 10:00
Full Text Link: http://ieeexplo ... rnumber=5995297
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2011-10
Published Online Date: 2011-08-22
Accepted Date: 2011-07-14
Submitted Date: 2010-12-13
Authors: Zhang, Jun
Fei, Li
Gao, Qiang
Peng, Xiao-Hong (ORCID Profile 0000-0002-0608-233X)



Version: Accepted Version

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