Wake-up radio in short-range wireless sensor network: Master's thesis

Mikko Valta

Research output: ThesisMaster's thesisTheses

Abstract

Energy efficiency is one of the major issues of sensor network nodes. From a power consumption point of view, measurement nodes should stay in a low-power sleep mode for long periods and only wake up when the measurement is made or the node is requested to do something else. Wake-up radio architecture is one possibility for providing long sleep periods and still enabling real-time controllability of the nodes. In this architecture a node has an additional very low power radio that listens to a wake up signal. The main radio is switched on only when a wake up request is received. As the main and the wake-up radios can have different operating ranges, many current multi-hop routing protocols are not optimal, as such, in these kinds of networks. This work investigates the effects a wake-up radio has on single and multi-hop sensor networks, focusing on energy saving possibilities. The requirements and limitations of sensor networks are discussed. After that, the characteristics of ad hoc routing protocols and wake-up radio solutions are examined. Most importantly, the effect of different ranges of the main and wake-up radios on routing is analysed. A solution is proposed for applying a RPL routing protocol to the wake-up radio equipped sensor network. In the chosen approach, both radios built up independent routing graphs used in their communication. In the evaluation part of this thesis, a complete testing network was built to measure key figures of the communication. That network was made by connecting AS3931 wake-up radio chips with the compatible transmitters to the sensor network motes (Redbee Econotag). The results show that notable energy savings can be achieved on both single-hop and multi-hop scenarios. On a packet rate of one packet per minute, the energy saving was 86 % on a single-hop scenario and 66 to 82 % on a two-hop scenario, when comparing to a system without a wake-up radio. The communication delay was on the same level on both systems, but the variation was significantly lower, when the wake-up radio was used.
Original languageEnglish
QualificationMaster Degree
Awarding Institution
  • University of Oulu
Place of PublicationOulu
Publisher
Publication statusPublished - 2013
MoE publication typeG2 Master's thesis, polytechnic Master's thesis

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Wireless sensor networks
Sensor networks
Radio receivers
Routing protocols
Energy conservation
Communication
Controllability
Energy efficiency
Transmitters
Electric power utilization
Testing

Cite this

Valta, Mikko. / Wake-up radio in short-range wireless sensor network : Master's thesis. Oulu : University of Oulu, 2013. 46 p.
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title = "Wake-up radio in short-range wireless sensor network: Master's thesis",
abstract = "Energy efficiency is one of the major issues of sensor network nodes. From a power consumption point of view, measurement nodes should stay in a low-power sleep mode for long periods and only wake up when the measurement is made or the node is requested to do something else. Wake-up radio architecture is one possibility for providing long sleep periods and still enabling real-time controllability of the nodes. In this architecture a node has an additional very low power radio that listens to a wake up signal. The main radio is switched on only when a wake up request is received. As the main and the wake-up radios can have different operating ranges, many current multi-hop routing protocols are not optimal, as such, in these kinds of networks. This work investigates the effects a wake-up radio has on single and multi-hop sensor networks, focusing on energy saving possibilities. The requirements and limitations of sensor networks are discussed. After that, the characteristics of ad hoc routing protocols and wake-up radio solutions are examined. Most importantly, the effect of different ranges of the main and wake-up radios on routing is analysed. A solution is proposed for applying a RPL routing protocol to the wake-up radio equipped sensor network. In the chosen approach, both radios built up independent routing graphs used in their communication. In the evaluation part of this thesis, a complete testing network was built to measure key figures of the communication. That network was made by connecting AS3931 wake-up radio chips with the compatible transmitters to the sensor network motes (Redbee Econotag). The results show that notable energy savings can be achieved on both single-hop and multi-hop scenarios. On a packet rate of one packet per minute, the energy saving was 86 {\%} on a single-hop scenario and 66 to 82 {\%} on a two-hop scenario, when comparing to a system without a wake-up radio. The communication delay was on the same level on both systems, but the variation was significantly lower, when the wake-up radio was used.",
author = "Mikko Valta",
note = "TK809 SDA: ICT University of Oulu; Department of computer science and engineering",
year = "2013",
language = "English",
publisher = "University of Oulu",
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school = "University of Oulu",

}

Valta, M 2013, 'Wake-up radio in short-range wireless sensor network: Master's thesis', Master Degree, University of Oulu, Oulu.

Wake-up radio in short-range wireless sensor network : Master's thesis. / Valta, Mikko.

Oulu : University of Oulu, 2013. 46 p.

Research output: ThesisMaster's thesisTheses

TY - THES

T1 - Wake-up radio in short-range wireless sensor network

T2 - Master's thesis

AU - Valta, Mikko

N1 - TK809 SDA: ICT University of Oulu; Department of computer science and engineering

PY - 2013

Y1 - 2013

N2 - Energy efficiency is one of the major issues of sensor network nodes. From a power consumption point of view, measurement nodes should stay in a low-power sleep mode for long periods and only wake up when the measurement is made or the node is requested to do something else. Wake-up radio architecture is one possibility for providing long sleep periods and still enabling real-time controllability of the nodes. In this architecture a node has an additional very low power radio that listens to a wake up signal. The main radio is switched on only when a wake up request is received. As the main and the wake-up radios can have different operating ranges, many current multi-hop routing protocols are not optimal, as such, in these kinds of networks. This work investigates the effects a wake-up radio has on single and multi-hop sensor networks, focusing on energy saving possibilities. The requirements and limitations of sensor networks are discussed. After that, the characteristics of ad hoc routing protocols and wake-up radio solutions are examined. Most importantly, the effect of different ranges of the main and wake-up radios on routing is analysed. A solution is proposed for applying a RPL routing protocol to the wake-up radio equipped sensor network. In the chosen approach, both radios built up independent routing graphs used in their communication. In the evaluation part of this thesis, a complete testing network was built to measure key figures of the communication. That network was made by connecting AS3931 wake-up radio chips with the compatible transmitters to the sensor network motes (Redbee Econotag). The results show that notable energy savings can be achieved on both single-hop and multi-hop scenarios. On a packet rate of one packet per minute, the energy saving was 86 % on a single-hop scenario and 66 to 82 % on a two-hop scenario, when comparing to a system without a wake-up radio. The communication delay was on the same level on both systems, but the variation was significantly lower, when the wake-up radio was used.

AB - Energy efficiency is one of the major issues of sensor network nodes. From a power consumption point of view, measurement nodes should stay in a low-power sleep mode for long periods and only wake up when the measurement is made or the node is requested to do something else. Wake-up radio architecture is one possibility for providing long sleep periods and still enabling real-time controllability of the nodes. In this architecture a node has an additional very low power radio that listens to a wake up signal. The main radio is switched on only when a wake up request is received. As the main and the wake-up radios can have different operating ranges, many current multi-hop routing protocols are not optimal, as such, in these kinds of networks. This work investigates the effects a wake-up radio has on single and multi-hop sensor networks, focusing on energy saving possibilities. The requirements and limitations of sensor networks are discussed. After that, the characteristics of ad hoc routing protocols and wake-up radio solutions are examined. Most importantly, the effect of different ranges of the main and wake-up radios on routing is analysed. A solution is proposed for applying a RPL routing protocol to the wake-up radio equipped sensor network. In the chosen approach, both radios built up independent routing graphs used in their communication. In the evaluation part of this thesis, a complete testing network was built to measure key figures of the communication. That network was made by connecting AS3931 wake-up radio chips with the compatible transmitters to the sensor network motes (Redbee Econotag). The results show that notable energy savings can be achieved on both single-hop and multi-hop scenarios. On a packet rate of one packet per minute, the energy saving was 86 % on a single-hop scenario and 66 to 82 % on a two-hop scenario, when comparing to a system without a wake-up radio. The communication delay was on the same level on both systems, but the variation was significantly lower, when the wake-up radio was used.

UR - http://urn.fi/URN:NBN:fi:oulu-201304051131

M3 - Master's thesis

PB - University of Oulu

CY - Oulu

ER -

Valta M. Wake-up radio in short-range wireless sensor network: Master's thesis. Oulu: University of Oulu, 2013. 46 p.