Cooperative Multigroup Multicast Transmission in Integrated Terrestrial-Satellite Networks

In this paper, we investigate the downlink cooperative multigroup multicast transmission in the integrated terrestrial-satellite network, in which base stations (BSs) and the satellite provide the multicast service for ground users in a cooperative manner while reusing the entire bandwidth. For both...

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Bibliographic Details
Published in:IEEE journal on selected areas in communications 2018-05, Vol.36 (5), p.981-992
Main Authors: Zhu, Xiangming, Jiang, Chunxiao, Yin, Liuguo, Kuang, Linling, Ge, Ning, Lu, Jianhua
Format: Article
Language:English
Subjects:
Array signal processing
Beamforming
cooperative
Design optimization
Downlink
integrated network
Interference
Iterative algorithms
Iterative methods
Multicast
Multicasting
Quality of service
Radio equipment
satellite
Satellite broadcasting
Satellite networks
Satellites
Signal to noise ratio
Time division
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Summary:In this paper, we investigate the downlink cooperative multigroup multicast transmission in the integrated terrestrial-satellite network, in which base stations (BSs) and the satellite provide the multicast service for ground users in a cooperative manner while reusing the entire bandwidth. For both terrestrial BSs and the satellite, multiantennas are equipped and beamforming techniques are utilized for improving the system performance. Based on the architecture, we formulate a weighted max-min fair (MMF) beamforming design problem to jointly optimize the beamforming vectors of BSs and the satellite, which is solved based on the relation between the quality of service problem and the MMF problem. When it comes to the large scale case, where large numbers of BSs are distributed within the coverage of the satellite, we propose a time division cooperative multigroup multicast scheme consisting of two phases for the BSs and the satellite. Then, an iterative algorithm is proposed to solve the weighted MMF problem in the time division case. Finally, numerical results are provided to evaluate the cooperative multicast schemes as well as the proposed algorithms.
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2018.2832780