Abstract
Wireless multi-hop networks have a solidarity property, in which each multi-hop link interferes mutually and so an increase in one link’s rate results in a decrease of the other links’ rate. In a multi-hop link, the end-to-end throughput between a source and destination is restricted by the lowest link rate, so the max-min fair allocation on the link rates is an optimal strategy to maximize the end-to-end throughput. In this paper, we verify that if the wireless links have a solidarity property, the max-min fair allocation has all link rates equal, so we propose a transmit power control (TPC) algorithm that decides the transmit power of multi-hop nodes to equalize all link rates. The proposed algorithm operates in a distributed manner, where each node averages the recognized link rates around itself, allocates its transmit power to achieve this average rate, and iterates this operation until all link rates become equal. Intensive simulation shows that the proposed TPC algorithm enables all link rates to converge on the same value, and thus maximizes the multi-hop end-to-end throughput while decreasing the power consumption of multi-hop nodes.
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Notes
Note that the rate and SINR can be converted to each other.
The full-duplex relay can decrease the per-hop processing delay, and thus increase the multi-hop end-to-end rate. However, this relay type generates more interference among links, and thus makes the proposed TPC algorithm more effective.
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Acknowledgments
This work was partly supported by the GRRC program of Gyeonggi province [(GRRCHankyong2011-B03), Low Power Machine-to-Machine Communication and Network for Management of Logistic Center] and the Human Resources Development program (No. 20124030200060) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy.
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Choi, HH., Lee, JR. Distributed Transmit Power Control for Maximizing End-to-End Throughput in Wireless Multi-hop Networks. Wireless Pers Commun 74, 1033–1044 (2014). https://doi.org/10.1007/s11277-013-1342-2
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DOI: https://doi.org/10.1007/s11277-013-1342-2