Design of Three Tier Hybrid Architecture Combing TDMA-CDMA Techniques to Mitigate Interference in WBAN

Wireless body area network (WBAN) has aroused an interesting field for research because it has modernized the traditional way of health monitoring. At present wireless devices are used for patient monitoring. But designing of wireless health analyzing device is quite challenging due to its miniature size. The vital issue faced in WBAN is signal collision during transmission which finally results in decreased reliability. Only a minimal investigation was found on collision avoidance in WBAN. So, the proposed research is focused on designing interference avoidance techniques related to WBAN. The proposed scheme combined time division multiple access (TDMA) framing and code division multiple access (CDMA) technique to develop a hybrid one. TDMA approach is used for allocating time slots to avoid intra-signal collisions, whereas CDMA is included for achieving code based simultaneous data transmission to avoid inter-signal collisions. By means of avoiding collision, the reliability of the network can be enhanced. The hybrid architecture is tested on the NS2 simulator, and the results are evaluated. Then, the estimated results are compared with the existing interference avoidance scheme.