| ELECTRONIC ENGINEERING |
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Radio resource management in integrated terrestrial HAP MBMS systems |
| DUAN Haining, ZHANG Yu, SONG Jian |
| Digital Television Research and Development Center, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China |
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Abstract Highaltitude platform (HAP) communication systems provide wide coverage, low networking costs, and large capacities for reliable multimedia broadcast/multicast services (MBMS) for terrestrial users. This paper presents an algorithm that jointly optimizes the downlink multiple access and the resource allocation for cooperative broadcasting using an integral HAP/terrestrial system which takes into account both the energy and spectrum efficiencies. The location distribution of active users is used to select the appropriate channel resources for each service that minimizes the energy use. Then, a hybrid orthogonal and non-orthogonal multiple access system is designed to satisfy the quality of service requirements for each service in the same channel to balance the spectral efficiency and the receiver complexity. Simulations verify that this algorithm is more efficient than the traditional orthogonal multiple access (OMA) strategy and single channel transmission algorithms. This algorithm has less complexity loss, significantly reduces transmission costs and provides more flexible radio resource management.
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| Keywords
broadcast and multicast services
high altitude platform
multiple access
cooperative communication
resource allocation
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Issue Date: 03 April 2020
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2020,
Vol. 60
