Timing-sync protocol for sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
An adaptive energy-efficient MAC protocol for wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Medium access control with coordinated adaptive sleeping for wireless sensor networks
IEEE/ACM Transactions on Networking (TON)
Performance measurements of motes sensor networks
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Versatile low power media access for wireless sensor networks
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Time-diffusion synchronization protocol for wireless sensor networks
IEEE/ACM Transactions on Networking (TON)
X-MAC: a short preamble MAC protocol for duty-cycled wireless sensor networks
Proceedings of the 4th international conference on Embedded networked sensor systems
Ultra-low duty cycle MAC with scheduled channel polling
Proceedings of the 4th international conference on Embedded networked sensor systems
DW-MAC: a low latency, energy efficient demand-wakeup MAC protocol for wireless sensor networks
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Proceedings of the 6th ACM conference on Embedded network sensor systems
Secure and resilient clock synchronization in wireless sensor networks
IEEE Journal on Selected Areas in Communications
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In wireless sensor MAC protocols, duty cycling has been exploited to put sensor nodes into sleeping state most of the time, thereby saving the limited battery efficiently. In this paper, we present a MAC protocol called Hop Extended MAC (HE-MAC) that enables a source node to transmit a data packet for multiple hops in a single duty cycle. It employs an EXP (Explorer) frame to set up the path for multiple hop transmission, which contains the information about the maximum number of hops that a packet can travel through in a single duty cycle. Using this information and an internal state of Ready-to-Receive (RTR), HE-MAC relays the packet beyond the termination of the data period. Along with our adaptive sleeping method, it additionally reduces power consumption. Then, we analytically obtain the packet latency of HE-MAC and find its optimal wakeup duration with respect to packet latency. Through ns-2 simulations, we observe that HE-MAC achieves 42.2% less power consumption and 23.6% less packet delay on average compared to RMAC [9] for a random topology of 300 nodes. With the allocated optimal wakeup duration, the latency of HE-MAC is reduced by 54.3% at maximum and 41.1% on average, compared to the case of default setting.