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학술지 CoR-MAC: Contention over Reservation MAC Protocol for Time-Critical Services in Wireless Body Area Sensor Networks
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저자
유정석, 박래혁, 박준호, 조성래, 금창섭
발행일
201605
출처
Sensors, v.16 no.5, pp.1-19
ISSN
1424-8220
출판사
MDPI AG
DOI
https://dx.doi.org/10.3390/s16050656
협약과제
16ZI1400, 단말 근접 실시간 스마트 서비스추천플랫폼 기술 개발, 금창섭
초록
Reserving time slots for urgent data, such as life-critical information, seems to be very attractive to guarantee their deadline requirements in wireless body area sensor networks (WBASNs). On the other hand, this reservation imposes a negative impact on performance for the utilization of a channel. This paper proposes a new channel access scheme referred to as the contention over reservation MAC (CoR-MAC) protocol for time-critical services in wireless body area sensor networks. CoR-MAC uses the dual reservation; if the reserved time slots are known to be vacant, other nodes can access the time slots by contention-based reservation to maximize the utilization of a channel and decrease the delay of the data. To measure the effectiveness of the proposed scheme against IEEE 802.15.4 and IEEE 802.15.6, we evaluated their performances with various performance indexes. The CoR-MAC showed 50% to 850% performance improvement in terms of the delay of urgent and time-critical data according to the number of nodes.
키워드
Priority level, Urgent data, Wireless body area sensor networks
KSP 제안 키워드
Channel Access(CA), Contention-based, Critical Data, Critical information, Critical services, IEEE 802.15.4, IEEE 802.15.6, Life-critical, MAC protocol, Negative impact, Priority level