Implementation Of WBAC MAC Protocol And Research On Scheduled Access Based On IEEE Std 802.15.6

With the development of wireless communication technology, wireless communication techniques have become an indispensable part of people's life. Because of this ubiquitous and invisible technology, connections between humans and things are much more direct. Moreover, the awareness and demands of healthcare are attracting more and more people's attention to the physical and mental healthcare area. However, the supply of medical health service is much less than the increasing demands, it is necessary to develop a new solution to wireless communication to monitor body condition ceaselessly. The international standard IEEE 802.15.6 for wireless body area networks(WBAN) is published in 2012, which unified the standardization of WBAN. China is still lack of valuable intellectual properties in this area, so the exploration in this area is necessary to eliminate the foreign technology lock-in. Different from the traditional wireless communication technologies, the WBAN technology needs to overcome the disturbance of human body and save as much energy as possible. Through the research on core technology of IEEE 802.15.6, this thesis is proposed a reliable, timely solution to collect personal health data. This thesis develops a prototype system which is improved according to the tests of IEEE 802.15.6 scheduled access model,and evaluates the protocol performance of the improved system under different scenarios.The research in the thesis is based on the medium access control(MAC) layer of the protocol of IEEE 802.15.6 and is composed of two parts:On the one hand, since the IEEE 802.15.6 does not provide any primitives, this thesis designs a new set of primitive which is appropriate for WBAN as an improvement. According to the reference model of layered protocol, this thesis fulfills WBAN prototype system and focuses on MAC layer of the protocol. This thesis also implements system testing to make sure the reliability of the WBAN prototype system. Since the IEEE 802.15.6 does not provide a specific number of the retransmission, to guarantee the reliability of the system, this thesis finds out the reference value of maximum number of retransmission by experimenting different frame error rate(FER) and the packet error rate(PER).On the other hand, to ensure the data are transmitted in time, this thesis finds out the optimal length of allocation interval by testing different factors, such as utilization of allocation intervals and the average packet delay, under different scenarios. This finding of allocation interval could be a supplementary suggestion of IEEE 802.15.6. At the same time, simulation and test results consolidate this theory, which verifies the validity and practicability of the model and the system.There are also some parts of this thesis need to be improved. The primitive could be more practical, and some parameters in the MAC layer of the protocol could be given reference values, so there are far more meaningful researches could be done on the MAC layer of the protocol.