Improve performance for IEEE 802.15.4 protocol in healthcare environment

Healthcare problems is a popular topic nowadays in both the market and the research area. The transmission of the healthcare data is one of the most urgent topics that requires to be solved. Hence, in this paper, a new ZigBee based wireless sensor network is designed under the hospital environment. The network is under beacon mode in the MAC layer to ensure the security issue. The network delay and the battery consumption of the devices are considered as the key objectives that need to be achieved. Therefore, Evidential reasoning method is adopted as the method to give trade off solutions for the network. The simulation shows that the network can perform better on the delay and battery consumption when count of backoff=2 and backoff index=1. Therefore, the multi-criteria making method is very suitable for this model.