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A Two-Way Time of Flight Ranging Scheme for Wireless Sensor Networks

Mazomenos, Evangelos, De Jager, Dirk, Reeve, Jeff and White, Neil, Marron, Pedro Jose and Whitehouse, Kamin(eds.) (2011) A Two-Way Time of Flight Ranging Scheme for Wireless Sensor Networks Lecture Notes in Computer Science, 6567, pp. 163-178.

Record type: Article


Relative ranging between Wireless Sensor Network (WSN) nodes is considered to be an important requirement for a number of distributed applications. This paper focuses on a two-way, time of flight (ToF) technique which achieves good accuracy in estimating the point-to-point distance between two wireless nodes. The underlying idea is to utilize a two-way time transfer approach in order to avoid the need for clock synchronization between the participating wireless nodes. Moreover, by employing multiple ToF measurements, sub-clock resolution is achieved. A calibration stage is used to estimate the various delays that occur during a message exchange and require subtraction from the initial timed value. The calculation of the range between the nodes takes place on-node making the proposed scheme suitable for distributed systems. Care has been taken to exclude the erroneous readings from the set of measurements that are used in the estimation of the desired range. The two-way ToF technique has been implemented on commercial off-the-self (COTS) devices without the need for additional hardware. The system has been deployed in various experimental locations both indoors and outdoors and the obtained results reveal that accuracy between 1 m RMS and 2.5 m RMS in line-of-sight conditions over a 42 m range can be achieved.

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Published date: 23 February 2011
Organisations: EEE


Local EPrints ID: 272051
ISSN: 0302-9743
PURE UUID: 460ff756-8c17-42f5-b07c-8aa8b334d51f
ORCID for Neil White: ORCID iD

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Date deposited: 21 Feb 2011 17:24
Last modified: 18 Jul 2017 06:35

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Author: Evangelos Mazomenos
Author: Dirk De Jager
Author: Jeff Reeve
Author: Neil White ORCID iD
Editor: Pedro Jose Marron
Editor: Kamin Whitehouse

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