Open AccessEnergy harvesting discontinuous reception (DRX) mechanism in wireless powered cellular networks
Author(s) -
Lee Mingyu,
Lee TaeJin
Publication year - 2017
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.0841
Subject(s) - computer science , energy harvesting , wireless , mechanism (biology) , energy (signal processing) , energy consumption , computer network , power (physics) , real time computing , battery (electricity) , telecommunications , electrical engineering , engineering , mathematics , philosophy , statistics , physics , epistemology , quantum mechanics
The energy harvesting paradigm enables the design of new wireless powered cellular networks (WPCNs) for the Internet‐of‐Things (IoT). In a WPCN, if the harvested energy is larger than the consumed energy, an IoT device may utilise the surplus harvested energy to extend the battery lifetime or to enhance the performance. Otherwise, a power saving mechanism is utilised as in traditional wireless cellular networks. In long‐term evolution (LTE) systems, the discontinuous reception (DRX) mechanism has been adopted to save the power consumption of user equipments (UEs). However, the wakeup delay increases as the amount of the saved energy increases, and the optimisation for the DRX mechanism is required. In this study, the authors propose a novel energy harvesting DRX (EH‐DRX) mechanism to minimise the wakeup delay in WPCNs. In the authors' proposed EH‐DRX mechanism, an IoT device utilises the harvested energy to minimise the wakeup delay. Then they provide an optimisation algorithm to allocate the DRX parameters by utilising the harvesting capability of IoT devices. The optimisation algorithm is based on the analytical model for the proposed EH‐DRX mechanism. Analysis and simulations indicate that the proposed EH‐DRX mechanism reduces the wakeup delay compared to the traditional DRX mechanisms.