Abstract
By using Software Defined Network (SDN) technology, senor nodes can get updated program code which can provide new features, so it has received extensive attention. How to effectively spread code to each node fast is a challenge issue in wireless sensor networks (WSNs). In this paper, an Adding Active Slot joint Larger Broadcast Radius (AAS-LBR) scheme is proposed for fast code dissemination. The AAS-LBR scheme combines the energy of data collection and code dissemination, making full use of the remaining energy in the far-sink area to increase the active slot and the broadcast radius to speed up the code dissemination. The main contributions of the proposed AAS-LBR scheme are the following: (1) Make full use of the remaining energy of the far sink area to expand the broadcast radius, so that the node broadcasts a longer distance. The wide range of broadcasts makes the number of nodes receiving code more, which speeds up the spread of code dissemination. (2) AAS-LBR uses two improved methods to further reduce the number of broadcasts and speed up the code dissemination: (a) When constructing the broadcast backbone whose nodes dominate all nodes in network and are responsible for broadcasting code, the active slot is added to the next hop node in a pipeline style on the diffusion path, which enables the code dissemination process to continue without pause. Thus, the code can quickly spread to the entire broadcast backbone. (b) For the nodes in the non-broadcast backbone whose nodes are dominated by the broadcast backbone and only for receiving code, an active slot is added coincident with its broadcast backbone’ active slot, which can reduce the time required for code dissemination and reduce the number of broadcasts. A lot of performance analysis and simulation results show that compared to previous schemed, the AAS-LBR scheme can balance energy consumption, the transmission delay can be reduced 43.09–78.69%, the number of broadcasts can be reduced 44.51–86.18% and the energy efficiency is improved by about 24.5%.
Highlights
Wireless sensor networks (WSNs) are an important component of the Internet of Things (IoTs), which have received wide attention from industry and academia [1,2,3,4]
After careful analysis, we found that increasing the active slot and increasing the broadcast radius in the wireless sensor network will not affect the network lifetime
Based on the above analysis, we propose the Adding Active Slot joint Larger Broadcast Radius (AAS-LBR) scheme
Summary
Wireless sensor networks (WSNs) are an important component of the Internet of Things (IoTs), which have received wide attention from industry and academia [1,2,3,4]. Because the sensor nodes are simple in structure and easy to deploy, they can perform long-term unattended monitoring of the monitoring target, and can send the monitoring data back to the control center through the self-organizing network in time for data analysis. This can m for example, monitor and protect wild animals and control the automatic control of industrial control systems, so its research value is huge [19,20,21]. SDN technology is a technology that uses re-programming technology [17,18]
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