Research Article
Ayesha Feroz and Dr.Ata-ul-Azi
Abstract
The power grid is going towards great evolution which is called smart grids(SG). It provides many other functions in addition to measure energy consumption like energy management, reliability and security with the help of different devices.AMI(advanced metering infrastructure) is an integral part of SG for two-way communication and structured in such a way that position of its nodes are fixed. Nodes used in AMI have limited power and resources and are energy constrained therefore they are considered as low power and lossynetworks(LLNS). Routing between these nodes is a major concern and our research issue. Simulation is done in COOJA in order to observe the performance of routing protocol for low power and lossy network (RPL) for AMI networks. RPL performance for medium and high density network has been simulated for two different objective functions(OF) and analyze different performance parameters. After simulation we have concluded that considering the quality, low latency and high reliability factors minimum rank with hysteresis objective function(MRHOF) gives better results as compare to objective function zero(OF0) in medium density networks. In high density network (above 100 nodes) OF0 outrun MRHOF in terms of packet delivery ratio(PDR). Average value of PDR for OF0(in high density network) is 2%to 6% higher as compare to MRHOF.COOJA simulation provide reasonable results for RPL nodes in high density networks. But due to load balancing and selection of unreliable links RPL nodes in large scale network suffers from performance degradation.