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Outdated Access Point Selection for Mobile Edge Computing With Cochannel Interference
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DOI：10.1109/TVT.2022.3167405.png)
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Abstract
En 中文
In this paper, we investigate a mobile edge computing (MEC) network, where the user has some computational tasks to be assisted by multiple computational access points (CAPs) through offloading. We consider practical communication scenarios with limited spectrum resources, and the cochannel interference arising from the aggressive reuse of frequency severely degrades the system offloading performance. To enhance the system performance, we provide three CAP selection criteria to choose one best CAP among multiple ones. Specifically, criterion I maximizes the computational capability at the CAP, criterion II minimizes the interfering power, while criterion III maximizes the instantaneous channel gain of data link. In time-varying channel environments, the CAP selection may be outdated, which deteriorates the system performance. For the three criteria, we evaluate the system outage probability in the outdated channel state information (CSI) by taking into account the latency, energy consumption and data rate, and provide the analytical and asymptotic expressions of outage probability, from which we obtain some critical insights on the system design. Simulation results are finally demonstrated to verify the proposed studies. In particular, criterion III under the perfect CSI can achieve the system whole diversity order coming from multiple CAPs.
Keywords:
Task analysis
Interchannel interference
System performance
Probability
Power system reliability
Energy consumption
Wireless networks
Mobile edge computing
cochannel interference
outage probability
task offloading
Journal
IF:
7.1
Papers:
1.8W
Citations:
6.6W
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