Abstract
Equipping communication apparatuses with energy-harvesting technology could achieve system sustainability without human intervention. Though the harvested energy of existing techniques is limited and intermittent, it is sufficient to power devices in low-power-consuming machine-to-machine (M2M) communications. However, due to the large number of devices with time-varying energy arrival, the medium access control protocol should be redesigned. This study focuses on studying energy-harvesting M2M uplink cellular communications from the protocol design perspective, considering the properties of M2M and energy harvesting. The authors first explore the performance of two fundamental schemes: push-based and pull-based random access channel (RACH) procedures in terms of preamble collision probability, throughput, energy efficiency, and packet delay. In the push-based scheme, devices are self-energy-aware and there is no schedule signalling cost. However, the performance degrades as the device number increases. The pull-based scheme is an alternative to have stable throughput and energy efficiency, with sacrifice of the extra scheduling cost and increasing latency. As a result, a hybrid scheme is proposed to adaptively select the preamble transmission schemes based on the estimated device number. The hybrid scheme guarantees adequate packet delay under different traffic loads and varying energy levels.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.