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Sensors 2016, 16, 1466 4 of 18 (ii) a MAC layer protocol (LoRaWAN), although the LoRa communications system also implies a specific access network architecture. The LoRa physical layer, developed by Semtech, allows for long-range, low-power.

. 322 Downloads. Abstract A low duty-cycle procedure medium access handle (Mac pc) process is very essential to save power for resource-constrained cellular sensor systems. Traditional sleep-wake scheduling mechanisms of Macintosh protocols either need periodic synchronization beacons or bring high end-to-end delivery latency expected to the lack of any synchrónization. In this document, we offer a reduced latency Macintosh protocol by adjusting the sleep windows (SW-MAC) considering traffic patterns. Nodés in SW-MAC tránsmit a series of search packets to wake up the next jump and estimate the visitors arrival period from upstream nodes to rest adaptively. For the large difference traffic, we adjust the sleep window making use of additive boost/multiplicative decrease system.

And then we design a scout-based arranging system with the over algorithms to cut short the shipping latency. Simulation results suggest that SW-MAC could considerably decrease the end-to-end packet delivery latency without sacrificing energy efficiency.

• A study with simulation of power consumption and latency for MAC protocols in WSN based on IR-UWB transceiver Abstract: The introduction of the Impulse The introduction of the Impulse Radio Ultra Wide Band (IR-UWB) in the field of Wireless Sensor Network (WSN) was promising for researchers especially for its low power consumption feature.
• To compare the energy consumption of our MAC protocol with that of the popular S-MAC protocol and show that our protocol has better energy efficiency as well as latency in a periodic data.