Opportunistic Aggregation over Duty Cycled Communications in Wireless Sensor Networks

Benson, J.; O'Donovan, Tony; Roedig, Utz; Sreenan, Cormac J.

doi:10.1109/ipsn.2008.30

Cited by 21 publications

(19 citation statements)

References 9 publications

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“…managing the data from the BAN, to a central server to the medical practitioner. The FrameComm protocol, first described in [13], presented in this paper focuses on managing the BAN data in relation to the patient's positional change (i.e. sitting to standing) and the effect such a change may have on the BAN's ability to cope with low to high sensor sampling rates.…”

Section: Related Workmentioning

confidence: 99%

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A context aware wireless body area network (BAN)

O'Donovan¹,

O’Donoghue²,

Sreenan³

et al. 2009

Proceedings of the 3d International ICST Conference on Pervasive Computing Technologies for Healthcare

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Abstract-In monitoring a patient's real-time vital signs through Body Area Networks (BAN), rich data sources are communicated to medical practitioners. The benefit of BANs may be negated if medical practitioners are overloaded with streams of BAN data. It is essential that data is delivered in a timely context aware manner. In this paper a BAN designed for falls assessment among elder patients (65+ years) is presented, with an emphasis on the communication scheme chosen. The FrameComm MAC protocol described in this paper employs three data management techniques, 1) message priority, 2) opportunistic aggregation and 3) an adaptive duty cycle, all of which are designed to ensure that patient vital signs (i.e. data packets) are delivered under a variety of network loads. The protocol is evaluated using a small laboratory network, initially configured to communicate Beat-toBeat (continuous blood pressure) readings when a patient goes from a sitting to a standing position and then with added ECG (ElectroCardioGram) readings.

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Section: Related Workmentioning

confidence: 99%

“…FrameComm, orginally described in [13], is a duty-cycled CSMA based MAC protocol that conforms to all these criteria. It is an implementation of the Framelet rendezvous mechanism extended to include message prioritisation, opportunistic aggregation and an adaptive duty cycle.…”

Section: Network Protocol -Framecommmentioning

confidence: 99%

A context aware wireless body area network (BAN)

O'Donovan¹,

O’Donoghue²,

Sreenan³

et al. 2009

Proceedings of the 3d International ICST Conference on Pervasive Computing Technologies for Healthcare

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“…FrameComm [2] is an implementation of a CSMA based MAC using the framelets scheme. It is similar to LPL (Low Power Listening), the default power saving protocol that is part of TinyOS 2.0.2, but it was developed in parallel and has a few key distinctions.…”

Section: A Framecommmentioning

confidence: 99%

“…Despite the overhead for the sender the scheme is very energy efficient, requires no additional hardware and no active coordination among nodes. This duty cycle concept was implemented in FrameComm [2] and is also used in the current TinyOS LPL low power listening module.…”

Section: Introductionmentioning

confidence: 99%

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Priority interrupts of Duty Cycled communications in wireless sensor networks

O'Donovan

Benson

Roedig

et al. 2008

2008 33rd IEEE Conference on Local Computer Networks (LCN)

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Abstract-FrameComm is a contention based, Duty Cycled, MAC protocol that ensures a message will be transmitted during the receiver's listen phase by sending a packet, followed by a short gap, repeatedly for a precalculated number of times or until an acknowledgment is received. While introducing duty cycled communications can yield large power savings it does so at the cost of increased delay and decreased throughput. Many WSNs may incorporate several distinct message types of varying priority. A node with a high priority message to send may find the channel to be busy with a lesser priority message from another node and must therefore 'back-off' leading to further delays. In a multi-hop environment, these delays are compounded and may become unacceptably large. This paper proposes adding a high priority interrupt message to FrameComm that allows a node with important data to send to interrupt another node's lesser priority transmission giving immediate access to the channel. The priority interrupt mechanism is evaluated using an implementation in TinyOS 2 on a small laboratory testbed.

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Coordinated Sleeping for Beaconless 802.15.4-Based Multihop Networks

Ruzzelli

Schoofs

O’Hare

et al. 2010

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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The last few years have seen a wide adoption of the IEEE 802.15.4 MAC/PHY standard for low-power communication between wireless sensor nodes. Within this work we study some fundamental drawbacks of the 802.15.4 specifications for multihop network deployments, which adversely affect the delivery rate and efficient node energy consumption. These issues are rectified by investigating a timezone-based scheduling, V-Route, that builds on 802.15.4 beaconless mode to enable both a synchronized sleep scheduling and a bidirectional communication between nodes in the sensor network and the PAN coordinator. The contributions of V-Route are threefold: (1) mitigate collisions, (2) enable packet routing and (3) provide energy saving in a multihop context, while maintaining the full compliancy with the 802.15.4 standard. We present a performance evaluation on energy consumption and latency with real experiments on Philips AquisGrain sensor nodes. Enhancing 802.15.4based multi-hop networks with V-Route yields energy reduction ranging from 27.3% to 85.3%, according to the required end-to-end latency.

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Opportunistic Aggregation over Duty Cycled Communications in Wireless Sensor Networks

Cited by 21 publications

References 9 publications

A context aware wireless body area network (BAN)

A context aware wireless body area network (BAN)

Priority interrupts of Duty Cycled communications in wireless sensor networks

Coordinated Sleeping for Beaconless 802.15.4-Based Multihop Networks

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