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Time-optimum packet scheduling for many-to-one routing in wireless sensor networks

By:
, , and
DOI: 10.1109/MOBHOC.2006.278656

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Abstract

This paper studies the WSN application scenario with periodical traffic from all sensors to a sink. We present a time-optimum and energy-efficient packet scheduling algorithm and its distributed implementation. We first give a general many-to-one packet scheduling algorithm for wireless networks, and then prove that it is time-optimum and costs max(2N(u1) - 1, N(u 0) -1) time slots, assuming each node reports one unit of data in each round. Here N(u0) is the total number of sensors, while N(u 1) denotes the number of sensors in a sink's largest branch subtree. With a few adjustments, we then show that our algorithm also achieves time-optimum scheduling in heterogeneous scenarios, where each sensor reports a heterogeneous amount of data in each round. Then we give a distributed implementation to let each node calculate its duty-cycle locally and maximize efficiency globally. In this packet scheduling algorithm, each node goes to sleep whenever it is not transceiving, so that the energy waste of idle listening is also eliminated. Finally, simulations are conducted to evaluate network performance using the Qualnet simulator. Among other contributions, our study also identifies the maximum reporting frequency that a deployed sensor network can handle. ??2006 IEEE.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Time-optimum packet scheduling for many-to-one routing in wireless sensor networks
ISBN:
1424405076; 9781424405077
DOI:
10.1109/MOBHOC.2006.278656
Year Published:
2007
Language:
English
Larger Work Title:
2006 IEEE International Conference on Mobile Ad Hoc and Sensor Systems, MASS
First page:
81
Last page:
90
Number of Pages:
10
Conference Title:
2006 IEEE International Conference on Mobile Ad Hoc and Sensor Sysetems, MASS
Conference Location:
Vancouver, BC
Conference Date:
9 October 2006 through 12 October 2006