Beamforming and Resource Allocation for Multiuser Full-Duplex Wireless-Powered Communications in IoT Networks
| Autor: | Changick Song, Sumaila Mahama, Kyoung-Jae Lee, Dongwan Kim, Derek Kwaku Pobi Asiedu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Beamforming
Channel allocation schemes Computer Networks and Communications Computer science business.industry Node (networking) ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Duplex (telecommunications) 020206 networking & telecommunications 020302 automobile design & engineering 02 engineering and technology Telecommunications network Computer Science Applications 0203 mechanical engineering Hardware and Architecture Signal Processing Telecommunications link 0202 electrical engineering electronic engineering information engineering Resource allocation Wireless business Information Systems Communication channel Computer network |
| Zdroj: | IEEE Internet of Things Journal. 7:11355-11370 |
| ISSN: | 2372-2541 |
| DOI: | 10.1109/jiot.2020.2991663 |
| Popis: | For a self-sustaining wireless communication system in the Internet-of-Things (IoT) networks, energy harvesting (EH) can be implemented at each user node as a constant renewable power supply source. Hence, an investigation into the use of wireless-powered communication network (WPCN) protocols to facilitate communication between an access point (AP) and multiple mobile users (MUs) is presented in this article. The AP has multiple antennas and operates in the full-duplex (FD) mode. The MUs, on the other hand, have single antennas and works in the half-duplex (HD) mode. Each MU communicating with the FD-AP is assigned to one of two groups, based on the time allocation and channel access for either uplink (UL) or downlink (DL) communication. The channel assignment, time resource, and power resource allocations are optimized to maximize the UL weighted sum rate. The sum-rate optimization problem is found to be nonconvex. Therefore, an iterative algorithm is investigated to optimize the UL weighted sum rate of the proposed FD-WPCN system. Next, the proposed FD-WPCN algorithm is modified for HD-WPCN-enabled communication between the AP and multiple MUs. Extensive simulations are conducted to verify the proposed algorithm for FD-WPCN and compare its performance with the HD-WPCN counterpart. From the simulation results, FD-WPCN outperformed HD-WPCN at a low AP transmit signal-to-noise ratio (SNR) region. The opposite behavior is observed for high AP transmit SNR due to increasing residual self-interference at the FD-AP. |
| Databáze: | OpenAIRE |
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