Link Fault Repair Algorithm of Wearable Wireless Sensor Networks based on Polygon Fermat Point

With the development of wearable wireless sensor network technology, the technology has been applied in more and more fields, such as military, medical rescue, transportation and so on. Especially in the field of medical rescue, because of the advantages of wearable wireless sensor network, such as portability, fast and flexible networking, it has a very high application prospect. However, due to the particularity of medical rescue scene, the communication quality of wearable wireless sensor network is facing a huge challenge. When there is a fault, it needs to repair the fault link timely and accurately. In this paper, a link fault repair algorithm based on polygon Fermat point (LFRA) is proposed. Firstly, the algorithm can repair the fault link by inserting the relay node after the fault occurs. Secondly, the algorithm considers the energy consumption of the nodes involved in the repair process, eliminates the nodes that do not meet the energy requirements, and avoids multiple repairs due to lack of energy. The simulation results show that the proposed algorithm has the advantages of fewer inserted relay nodes and longer maximum communication time between nodes.