Research On Hybrid Routing Protocol For Smart Grid Neighborhood Area Network

The next generation of power systems is called Smart Grid(SG).Advanced network communication technology can achieve SG economy and fast communication,but Smart Grid Communication Network(SGCN)is still facing the challenge of communication reliability.Neighborhood Area Network(NAN)is in the middle of SGCN and plays an important role in SGCN.The routing algorithm of NAN is the key technology to determine the quality and efficiency of SGCN communication.This paper focus on the research on the routing algorithm for NAN.Firstly,the network topology and characteristics of NAN are analyzed,and the routing algorithms which can be applied to NAN are summarized.Then,HWMP(Hybrid Wireless Mesh Protocol)which is suitable for NAN is analyzed in detailed.Considering the communication characteristics and requirements of NAN,the routing metric and route recovery mechanism of HWMP are improved.A new routing allgorithms called HR-HWMP(Highly Reliable-HWMP)algorithm which is more suitable for SGCN is proposed in this paper.In the aspect of routing metric,the shortcomings of ALM(Airtime Link Metric)applied to NAN is analyzed firstly.Combining with the interference factors of communication environment and channel switching delay which have effect on the quality of the communication link,a new routing metric named HM(Hybrid Metric)is proposed.In the aspect of routing recovery mechanism of HR-HWMP,the routing recovery mechanism of HWMP is analyzed.A new routing recovery mechanism called ERRR(efficient and reliable recovery mechanism)is proposed to reduce the times of unnecessary recovery mechanism triggers and an efficient and reliable route recovery is achieved when the link is interrupted.ERRR recovery mechanism is composed of the monitoring mechanism and the backup path recovery mechanism based on the backtracking algorithm.Using monitoring technology,the backtracking algorithm,the backup path strategy and the threshold value to achieve the efficient and reliable routing recovery strategy.Then,HR-HWMP algorithm is simulated on NS3.The results show that the performance in the packet transmission rate and network throughput have improved.When the number of nodes is greater than 40,the packet transmission rate is about 95%.Finally,the summary and the prospect of this paper are given,and the relevant work worthy of further research in the future is pointed out.