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To avoid idle listening and to improve energy efficiency in short range communication networks, a generic wake-up radio (WUR) based medium access control (GWR-MAC) protocol is proposed. GWR-MAC is not restricted to a specific WUR technology or data radio technology, and therefore it is suitable for a variety of scenarios in wireless sensor and body area networks. GWR-MAC includes a bidirectional wake-up...
A new asynchronous medium access control (MAC) protocol using dual busy tone for channel reservation, called HCRBT, is proposed. Compared with legacy channel reservation MAC protocols, where channel reservation information (CRI) is broadcasted by piggybacking it in a packet, HCRBT improves the reliability of channel reservation by using dual busy tone. In HCRBT, CRI is broadcasted by busy tones rather...
As the novel and effective approach to improving the utilization of the precious radio spectrum, cognitive radio technology is the key to realize the dynamic spectrum access (DSA) networks, where the secondary (unlicensed) users can opportunistically utilize the unused licensed spectrum in a way that confines the level of interference to the range the primary (licensed) users can tolerate. However,...
We consider a class of single hop wireless sensor networks in which the sensor nodes collect data periodically and transmit it to a sink. To reduce the complexity, cost and energy consumption of the nodes we propose the use of an asymmetric transceiver model in which the sensor nodes can transmit to the sink using standard physical layer modulation schemes that support relatively high data rates but...
Radio spectrum resource is a finite resource and of fundamental importance for wireless communication. But the utilization of the spectrum became unbalanced, some spectrum is crowd with users and some is inefficiently used. The concept of cognitive radio is a good solution for this problem. One of the tasks to realize this technology is to design an efficient MAC protocol. OSA-MAC is one of the practical...
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