79. Performance Analysis of Routing Algorithm Based on Link Quality in Wireless Sensor Networks

Wireless sensor network (WSN) is used for an environment that enables an user to collect information in its surrounding. But this system has a disadvantage that a node usually requires a large quantity of energy consumption, since the collected information is transmitted to user via wireless link. For such a reason, it is required that a new scheme should be implemented using link quality indication (LQI) and hop count scheme to allow the user to estimate the quality of wireless link in order to employ highly reliable and energy efficient link system. The purpose of this work lies within a pursuit of standard deviation routing algorithm that selects a path with small LQI standard deviation value after calculating individual LQI value of the path in order to create energy-saving routing environment. Then, this new scheme we are going to propose in this work is to be compared at RF output level of −25 , −10, −7 dBm with conventional ones such as minimum-LQI, hop-LQI weight, cumulate-LQI. According to the result of research, the algorithm proposed in this work showed more superior than the conventional algorithms did in terms of the number of flowing-through nodes and the rate of retransmission. Therefore, it is concluded that the efficient reduction of energy consumption becomes possible if LQI standard deviation routing algorithm is introduced to wireless sensor network system with limited quantity of energy consumption allowed.