FSO/RF hybrid link transmission rate optimization method through UAV relay

SHAO Long; LI Yongjun; LI Xin; WANG Meng; SONG Xinkang; TANG Hanling; ZHAO Shanghong

doi:10.5768/JAO202344.0508003

Journal of Applied Optics > 2023 > 44(5): 1142-1152. > DOI: 10.5768/JAO202344.0508003

SHAO Long, LI Yongjun, LI Xin, WANG Meng, SONG Xinkang, TANG Hanling, ZHAO Shanghong. FSO/RF hybrid link transmission rate optimization method through UAV relay[J]. Journal of Applied Optics, 2023, 44(5): 1142-1152. DOI: 10.5768/JAO202344.0508003

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FSO/RF hybrid link transmission rate optimization method through UAV relay

1.
College of Information and Navigation, Air Force Engineering University, Xi'an 710077, China
2.
Unit 93658 of PLA, Beijing 100000, China

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Received Date: February 07, 2023
Revised Date: May 07, 2023
Available Online: August 15, 2023

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Abstract

Abstract

The UAV free space optical (FSO)/radio frequency (RF) hybrid relay-link transmission rate optimization method was proposed for the mismatch of communication rate between the FSO link and the RF link, and the problem of communication service state change caused by ground multi-user movement. Taking user fairness, minimum quality of service and total UAV power as constraints, a free space optical communication/radio frequency (FSO/RF) hybrid communication downlink model through UAV relay was established, and a joint optimization algorithm based on UAV dynamic trajectory and transmitting power was proposed. Using successive convex approximation and Lagrange dual function method, the original nonconvex model was transformed into a convex optimization problem for solving. Analysis of the link transmission rates at different visibility levels shows that both the FSO link and the RF link reach full-speed transmission when the visibility is 1.7 km. The proposed algorithm has a 447.5% improvement over fixed relay and a 32.5% improvement over non-power optimization algorithm link in average communication rate.
- free space optical/radio frequency hybrid link,
- convex optimization,
- dual problem,
- joint optimization,
- communication rate

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References (29)

References

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FSO/RF hybrid link transmission rate optimization method through UAV relay