During the disaster situation, there is a vital need for public safety communications to enable mission-critical search and rescue operations. In public safety networks, key challenge is to provide reliable and flexible wireless coverage to the affected areas. Unmanned aerial vehicles (UAVs) can act as aerial base station (BS) to provide the emergency communication services. Battery life of UAVs is a scarce resource that requires UAV BS tranmit power optimization. To overcome this issue, a model which consist of fixed BS, observation UAV and relay UAV is adopted to enable long distance communication. The optimal placement of relay UAV becomes requisite for reliable connectivity between observation UAV and ground BS. In this chapter, our objective is to minimize the sum-power of observation and relay UAVs by using the optimal placement of relay UAV. The optimized power ensure throughput requirement for real-time communication. The proposed formulated non-convex problem is transformed into convex optimization problem, and the optimal solution is acquired using interior point method. The simulation result shows that the required targeted link-rate between relay UAV and observation UAV and also between relay UAV and ground BS is achieved at minimum sum power.
Power-Efficient UAV Placement in Relay Assisted Heterogeneous Public Safety Networks
Unmanned Syst. Tech.
Intelligent Unmanned Air Vehicles Communications for Public Safety Networks ; Chapter : 4 ; 91-103
2022-05-07
13 pages
Article/Chapter (Book)
Electronic Resource
English
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