Abstract
Considering the limited resources and the dynamic spectrum distribution in the cognitive radio sensor networks (CRSN), a half-duplex Multichannel broadcast protocol for CRSN is presented based on the home channel. This protocol maintains the networks topology only through the home channel, so there is no need for the public channel to transmit the control information and no need for the synchronization. After network initialization, node broadcasts data via home channel in half-duplex transmission way. The simulation results show that, compared with complete broadcast, the proposed protocol effectively reduces broadcast delay and overhead.
Highlights
Wireless sensor network (WSN) is composed of a large number of densely deployed sensor nodes and is widely used in environment monitoring and protection, medical care, and military field [1, 2]
Chakraborty et al [6] presented a reliable completely spanning tree method for WSN broadcasting; Hsu et al [7] proposed two kinds of WSN basic broadcast model. Those traditional WSN broadcasting methods were based on fixed spectrum allocation, without considering the channel change, routing change, and topology change caused by primary cognitive radio users (PU) access
This paper proposes a half-duplex broadcast protocol for cognitive radio sensor networks (CRSN) based on home channel, referred to as home channel broadcast
Summary
Wireless sensor network (WSN) is composed of a large number of densely deployed sensor nodes and is widely used in environment monitoring and protection, medical care, and military field [1, 2]. Chakraborty et al [6] presented a reliable completely spanning tree method for WSN broadcasting; Hsu et al [7] proposed two kinds of WSN basic broadcast model Those traditional WSN broadcasting methods were based on fixed spectrum allocation, without considering the channel change, routing change, and topology change caused by primary cognitive radio users (PU) access. For the broadcast protocol in CR, Kondareddy and Agrawal [8] proposed a kind of CR selectivity broadcast algorithm to reduce the broadcast delay This method assumed network topology and the available channel information was known, but this assumption was difficult to set up for CRSN. This paper proposes a half-duplex broadcast protocol for CRSN based on home channel, referred to as home channel broadcast This protocol maintains the networks topology only through the home channel, so there is no need for the public channel to transmit the control information and no need for the synchronization.
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