Bin Liu, Zhisheng Yan, and Chang Wen Chen

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Presentation transcript:

Bin Liu, Zhisheng Yan, and Chang Wen Chen CA-MAC: A Hybrid Context-aware MAC Protocol for Wireless Body Area Networks Bin Liu, Zhisheng Yan, and Chang Wen Chen 2013.06.04 Dohwan Kim

Table of contents WBAN CA-MAC Simulation Conclusion

WBAN Wireless body area network (WBAN) is a body- centric system which consists of body-worn sensors and master node. Sensor nodes collect and transmit various kinds of data including heart rate, ECG, blood glucose and EEG. TDMA-based MAC and contention-based MAC are known as two basic channel access mechanisms for wireless sensor network (WSN).

CA-MAC CA-MAC is a new hybrid contention/TDMA MAC. The length of beacon and the whole frame is fixed but the proportion that contention part or TDMA part occupies is changed adaptively.

CA-MAC 𝐶𝐿 𝐼 𝑖 : contention length index 𝑁𝐶𝐷 𝑃 𝑖 : the number of consecutively dropped packets from one sensor node. 𝑇𝐷𝐶 : the times of data collision among all sensor nodes.

CA-MAC

CA-MAC

Simulation

Conclusion CA-MAC can overcome challenges resulting from time-varying traffic and channel conditions in WBAN.