Abstract
Using multiple channels in wireless sensor networks helps increase the overall throughput and avoid interferences. In addition, introducing multi-interface nodes further helps in increasing the packet delivery rate for those specific nodes. In this paper, we evaluate a channel allocation method based on neighborhood discovery up to 3 hops and a hybrid MAC protocol designed for high data rate wireless sensor networks. We propose a network segmentation that takes into consideration the existence of multi-interface sink in order to further increase to packet delivery ratio. Our protocol, called HMC-MAC, uses Time Devision Multiple Access (TDMA) for sequencing nodes activity, and Carrier Sense Multiple Access (CSMA)/CA with Frequency Devision Multiple Access (FDMA) for simultaneous data exchange. We evaluated our method using NS2 simulator and results show that HMC-MAC protocol improves the overall network performance compared to other protocols especially with high data rate and burst traffic.
Highlights
Multi-channel MAC protocols have recently obtained considerable attention in wireless sensor networks (WSNs) because they help increase the network performance
HMC-MAC was first proposed in [5], a Hybrid Multi-Channel MAC protocol that uses a combination between Time Devision Multiple Access (TDMA) (Time Division Multiple Access), CSMA (Carrier Sense Multiple Access) and Frequency Devision Multiple Access (FDMA)
We evaluated under high data rates the performance of HMC-MAC, a hybrid multi-channel MAC protocol for WSNs
Summary
Multi-channel MAC protocols have recently obtained considerable attention in wireless sensor networks (WSNs) because they help increase the network performance. In dense deployment of sensor networks, a single channel utilization generates a high level of interference and limit the use of the bandwidth This is especially the case when a large burst of packets is generated simultaneously in different nodes due to a change in the monitored conditions, or when running multiple applications and accumulating the traffic of each application leads to higher packet density in the network. HMC-MAC was first proposed in [5], a Hybrid Multi-Channel MAC protocol that uses a combination between TDMA (Time Division Multiple Access), CSMA (Carrier Sense Multiple Access) and FDMA (Frequency Division Multiple Access) techniques It is based on CSMA/CA which has the advantage of being a distributed and a lightweight algorithm that does not require a strict synchronization to exchange data frames and which enables the network to be scalable.
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