期刊名称：International Journal of Distributed Sensor Networks
印刷版ISSN：1550-1329
电子版ISSN：1550-1477
出版年度：2014
卷号：2014
DOI：10.1155/2014/481761
出版社：Hindawi Publishing Corporation
摘要：This paper introduces a hybrid and secure MAC protocol
(PMAC) for WBAN. The PMAC protocol uses two contention access
periods (CAPs) for accommodating normal and life-critical traffic and
one contention-free period (CFP) for accommodating large amount of
data packets. The priority-guaranteed CSMA/CA procedure is used in
the CAP period, where different priorities are assigned to WBAN nodes
by adjusting the backoff window size. In addition, a set of security keys is
used to prevent illegal access to the network. Analytical expressions are
derived to analyze the average delay, power consumption, throughput,
and packet loss probability of the PMAC protocol. Results derived from
these expressions are validated by computer simulations.
