title: An energy efficient MAC protocol for multi-hop swallowable body sensor networks.
abstract: Swallowable body sensor networks (BSNs) are composed of sensors which are swallowed by patients and send the collected data to the outside coordinator. These sensors are energy constraint and the batteries are difficult to be replaced. The medium access control (MAC) protocol plays an important role in energy management. This paper investigates an energy efficient MAC protocol design for swallowable BSNs. Multi-hop communication is analyzed and proved more energy efficient than single-hop communication within the human body when the circuitry power is low. Based on this result, a centrally controlled time slotting schedule is proposed. The major workload is shifted from the sensors to the coordinator. The coordinator collects the path-loss map and calculates the schedules, including routing, slot assignment and transmission power. Sensor nodes follow the schedules to send data in a multi-hop way. The proposed protocol is compared with the IEEE 802.15.6 protocol in terms of energy consumption. The results show that it is more energy efficient than IEEE 802.15.6 for swallowable BSN scenarios.
authors.affiliation: School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China. fxlinlin@shu.edu.cn.
authors.forename: Lin
authors.initials: L
authors.lastname: Lin
authors.affiliation: School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China. ycfmaple@163.com.
authors.forename: Chengfeng
authors.initials: C
authors.lastname: Yang
authors.affiliation: Singapore Institute of Technology, 138683 Singapore. Steven.Wong@SingaporeTech.edu.sg.
authors.forename: Kai Juan
authors.initials: KJ
authors.lastname: Wong
authors.affiliation: School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. yan_hao@sjtu.edu.cn.
authors.forename: Hao
authors.initials: H
authors.lastname: Yan
authors.affiliation: School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China. sjwshu@163.com.
authors.forename: Junwen
authors.initials: J
authors.lastname: Shen
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798 Singapore. msjphee@ntu.edu.sg.
authors.forename: Soo Jay
authors.initials: SJ
authors.lastname: Phee
mesh_terms: D000465:Algorithms; D015374:Biosensing Techniques; D003195:Computer Communication Networks; D003679:Deglutition; D006801:Humans; D059015:Wireless Technology