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Computation Bits Maximization in a Backscatter Assisted Wirelessly Powered MEC Network
DOI:10.1109/LCOMM.2020.3027294.png)
摘要
En 中文
This letter introduces a backscatter assisted wirelessly powered mobile edge computing (MEC) network, where each edge user (EU) can offload task bits to the MEC server via hybrid harvest-then-transmit (HTT) and backscatter communications. In particular, considering a practical non-linear energy harvesting (EH) model and a partial offloading scheme at each EU, we propose a scheme to maximize the weighted sum computation bits of all the EUs by jointly optimizing the backscatter reflection coefficient and time, active transmission power and time, local computing frequency and execution time of each EU. By introducing a series of auxiliary variables and using the properties of the non-linear EH model, we transform the original non-convex problem into a convex one and derive closed-form expressions for parts of the optimal solutions. Simulation results demonstrate the advantage of the proposed scheme over benchmark schemes in terms of weighted sum computation bits.
Keyword:
Task analysis
Servers
Computational modeling
Backscatter
Resource management
Integrated circuit modeling
Time-frequency analysis
Mobile edge computing
backscatter communications
partial offloading
sum computation bits
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期刊
IF:
4.4
论文数:
1.3W
被引数:
2.2W
机构
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