Abstract
In this paper, we propose Low Energy Service Discovery (LESD) protocol for common discovery mode of IEEE 802.15.8 Peer Aware Communications (PAC). In order to minimize power consumption, Basic Repetition Block (BRB) is defined. Device is able to select operating mode and synchronize other devices through it. Proposed MAC procedure is Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) based on overhearing technique. Even if device has not been received response signal since transmitted request signal, it is able to discover other devices of same group through the overhearing technique. IEEE 802.15.8 PAC has required that performances of common discovery mode are presented about discovered devices during the simulation time, discovery latency and average power consumption. By considering the number of devices per group and channel environment, two scenarios are evaluated through system level simulation and the simulation results of proposed scheme are compared with CSMA/CA in same 논문 14-39B-05-01 The Journal of Korea Information and Communications Society '14-05 Vol.39B No.05 http://dx.doi.org/10.7840/kics.2014.39B.5.251 251 ※ 본 연구는 지식경제부 “초절전 센서네트워크 핵심기술개발” 과제에 의해 수행되었습니다. First Author : Chungnam National University Department of Information and communication, jw_lee@cnu.ac.kr, 학생회원 ° Corresponding Author : Chungnam National University Department of Information and communication, jmahn@cnu.ac.kr, 종신회원 * Electronics and Telecommunications Research Institute Department of USN/IoT Convergence research, kh.lee@etri.re.kr, tjpark@etri.re.kr, 준회원 논문번호:KICS2013-11-500, Received November 18, 2013; Revised April 16, 2014; Accepted May 9, 2014 The Journal of Korea Information and Communications Society '14-05 Vol.39B No.05 252 simulation conditions. As a result, proposed scheme is able to get high energy efficiency of devices as well as increase the number of discovered devices during simulation time when the longer the number of devices is distributed over a limited area.
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