An Optimized Handover Scheme with Movement Trend Awareness for Body Sensor Networks

Sensors

Wen Sun³  Zhiqiang Zhang¹  Lianying Ji² 

[1] Department of Computing, Imperial College, London SW7 2AZ, UK; E-Mail:;Graduate University of Chinese Academy of Sciences, Beijing 100049, China; E-Mail:;Department of Electrical and Computer Engineering, National University of Singapore, Singapore 119613, Singapore; E-Mail: wong

关键词: localization;    handover;    body sensor network;   

DOI  :  10.3390/s130607308

来源: mdpi

【 摘 要 】

When a body sensor network (BSN) that is linked to the backbone via a wireless network interface moves from one coverage zone to another, a handover is required to maintain network connectivity. This paper presents an optimized handover scheme with movement trend awareness for BSNs. The proposed scheme predicts the future position of a BSN user using the movement trend extracted from the historical position, and adjusts the handover decision accordingly. Handover initiation time is optimized when the unnecessary handover rate is estimated to meet the requirement and the outage probability is minimized. The proposed handover scheme is simulated in a BSN deployment area in a hospital environment in UK. Simulation results show that the proposed scheme reduces the outage probability by 22% as compared with the existing hysteresis-based handover scheme under the constraint of acceptable handover rate.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.