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Cross Layer Adaptation of Check intervals in low power listening MAC protocols for lifetime improvement in Wireless Sensor Networks.

Escolar S, Chessa S, Carretero J, Marinescu MC - Sensors (Basel) (2012)

Bottom Line: We propose Cross Layer Adaptation of Check intervals (CLAC), a novel protocol intended to reduce the energy consumption of the nodes without significantly increasing the delay.CLAC uses routing and MAC layer information to compute a delay that matches the packet arrival time.The simulation results confirm that CLAC improves the network lifetime at no additional packet loss and without affecting the end-to-end delay.

View Article: PubMed Central - PubMed

Affiliation: Computer Science Department, University Carlos III of Madrid, Avda. Universidad 30, Madrid 28911, Spain. mariasoledad.escolar@uc3m.es

ABSTRACT
Preamble sampling-based MAC protocols designed for Wireless Sensor Networks (WSN) are aimed at prolonging the lifetime of the nodes by scheduling their times of activity. This scheduling exploits node synchronization to find the right trade-off between energy consumption and delay. In this paper we consider the problem of node synchronization in preamble sampling protocols. We propose Cross Layer Adaptation of Check intervals (CLAC), a novel protocol intended to reduce the energy consumption of the nodes without significantly increasing the delay. Our protocol modifies the scheduling of the nodes based on estimating the delay experienced by a packet that travels along a multi-hop path. CLAC uses routing and MAC layer information to compute a delay that matches the packet arrival time. We have implemented CLAC on top of well-known routing and MAC protocols for WSN, and we have evaluated our implementation using the Avrora simulator. The simulation results confirm that CLAC improves the network lifetime at no additional packet loss and without affecting the end-to-end delay.

No MeSH data available.


Related in: MedlinePlus

Behavior of CLAC in two different scenarios: on the left, the ideal case with no contention delays. On the right, a realistic case where delays are introduced at each hop. CLAC adjusts the next check interval in the receivers. In the figure τ stands for the time of transmission/reception of a packet of length s on the medium.
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f5-sensors-12-10511: Behavior of CLAC in two different scenarios: on the left, the ideal case with no contention delays. On the right, a realistic case where delays are introduced at each hop. CLAC adjusts the next check interval in the receivers. In the figure τ stands for the time of transmission/reception of a packet of length s on the medium.

Mentions: Consider the BoX-MAC behavior presented in Figure 4, where the reception of the packets is shifted to the next round of communication. CLAC can solve this problem by adapting the check intervals of the nodes as shown in Figure 5. We show two possible situations: On the left, an ideal situation where the nodes do not incur contention delays. CLAC adapts the check interval of each node to match the time to send and receive each packet. On the right, a more realistic scenario where network delays do exist. In this case, CLAC shifts the check interval of each node according to the delay introduced by the packet in order to wake up precisely at the packet arrival time. We can ensure that the packet is successfully received since the radio is maintained on during the time needed to complete its reception.


Cross Layer Adaptation of Check intervals in low power listening MAC protocols for lifetime improvement in Wireless Sensor Networks.

Escolar S, Chessa S, Carretero J, Marinescu MC - Sensors (Basel) (2012)

Behavior of CLAC in two different scenarios: on the left, the ideal case with no contention delays. On the right, a realistic case where delays are introduced at each hop. CLAC adjusts the next check interval in the receivers. In the figure τ stands for the time of transmission/reception of a packet of length s on the medium.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472841&req=5

f5-sensors-12-10511: Behavior of CLAC in two different scenarios: on the left, the ideal case with no contention delays. On the right, a realistic case where delays are introduced at each hop. CLAC adjusts the next check interval in the receivers. In the figure τ stands for the time of transmission/reception of a packet of length s on the medium.
Mentions: Consider the BoX-MAC behavior presented in Figure 4, where the reception of the packets is shifted to the next round of communication. CLAC can solve this problem by adapting the check intervals of the nodes as shown in Figure 5. We show two possible situations: On the left, an ideal situation where the nodes do not incur contention delays. CLAC adapts the check interval of each node to match the time to send and receive each packet. On the right, a more realistic scenario where network delays do exist. In this case, CLAC shifts the check interval of each node according to the delay introduced by the packet in order to wake up precisely at the packet arrival time. We can ensure that the packet is successfully received since the radio is maintained on during the time needed to complete its reception.

Bottom Line: We propose Cross Layer Adaptation of Check intervals (CLAC), a novel protocol intended to reduce the energy consumption of the nodes without significantly increasing the delay.CLAC uses routing and MAC layer information to compute a delay that matches the packet arrival time.The simulation results confirm that CLAC improves the network lifetime at no additional packet loss and without affecting the end-to-end delay.

View Article: PubMed Central - PubMed

Affiliation: Computer Science Department, University Carlos III of Madrid, Avda. Universidad 30, Madrid 28911, Spain. mariasoledad.escolar@uc3m.es

ABSTRACT
Preamble sampling-based MAC protocols designed for Wireless Sensor Networks (WSN) are aimed at prolonging the lifetime of the nodes by scheduling their times of activity. This scheduling exploits node synchronization to find the right trade-off between energy consumption and delay. In this paper we consider the problem of node synchronization in preamble sampling protocols. We propose Cross Layer Adaptation of Check intervals (CLAC), a novel protocol intended to reduce the energy consumption of the nodes without significantly increasing the delay. Our protocol modifies the scheduling of the nodes based on estimating the delay experienced by a packet that travels along a multi-hop path. CLAC uses routing and MAC layer information to compute a delay that matches the packet arrival time. We have implemented CLAC on top of well-known routing and MAC protocols for WSN, and we have evaluated our implementation using the Avrora simulator. The simulation results confirm that CLAC improves the network lifetime at no additional packet loss and without affecting the end-to-end delay.

No MeSH data available.


Related in: MedlinePlus