Journal
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
Volume 70, Issue 12, Pages 13441-13446Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2021.3093892
Keywords
Cognitive radio; computation offloading; energy efficiency; NOMA; D2D communication
Categories
Funding
- National Natural Science Foundation of China [62001076]
- Chongqing Municipal Education Commission [KJQN201900645]
- Chongqing Postgraduate Research and Innovation Project [CYS19251]
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The paper proposes a D2D-assisted computation offloading scheme for NOMA-enabled CRNs, optimizing offloading decision and power control of PU and SU to minimize energy consumption while meeting task deadline and maximum transmit power constraints. The solution is obtained using block coordinate descent method and successive convex approximation, showing improvement in energy consumption and computing performance compared to other methods according to simulation results.
Due to the limited computation resources and lifetime of user equipment, we study the energy minimization problem for computation offloading in cognitive radio networks (CRNs). This work proposes a device-to-device (D2D)-assisted computation offloading scheme for non-orthogonal multiple access (NOMA)-enabled CRNs. Specifically, the secondary user (SU) can provide computation resources for the primary user (PU) to access the spectrum owned by the PU. With the constraints of task deadline and maximum transmit power, offloading decision and power control of PU and SU are optimized to minimize the energy consumption of CRNs. The solution is obtained by deploying the block coordinate descent method and successive convex approximation. Simulation results show the improvement of the proposed scheme in terms of energy consumption and computing performance compared with other methods.
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