Design and implementation of semi-dynamic multi-channel transceiver in WSNs

The proactive healthcare systems with wireless sensor network (WSN) technology have been one of the most active research topics in the past few years. For sensing and reporting data asynchronously, the low data rate of Zigbee transmission could be satisfied. On the other hand, for real time multimedia streaming, the multi-channel communication could be an effective technology to alleviate contention as well as interference and consequently improve the transmission throughput. In this paper, we will design and implement the semi-dynamic multi-channel transceivers for voice communication over WSNs. To prevent the possible packet loss due to the common channel interference, it is important to appropriately design and arrange the channel scheduling and switching as well as packet transmission in Zigbee communications. The implemented testbed performance, such as delay, packet loss and voice quality of service (QoS) will be evaluated using multi-channel communications.