Τίτλος:
HST-NNC: A Novel Hybrid Satellite-Terrestrial Communication with NOMA and Network Coding Systems
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Hybrid satellite-terrestrial networks (HSTNs) are considered to be a promising solution in dealing with coverage and mobility challenges encountered in 5th generation (5G) networks that employ novel multiple access and connectivity schemes. In this respect, non-orthogonal multiple access (NOMA) as well as network coding (NC) schemes have attracted significant attention due to their performance gains which not only improve the quality of wireless transmission but also effectively exploit the available spectrum. In this paper, a combined NOMA-NC (NNC) scheme is presented and integrated into an HSTN consisting of a low earth orbit (LEO) satellite belonging to an LEO constellation, a terrestrial base station (BS), and multiple terrestrial mobile terminals (MTs). The proposed scheme, termed HST-NNC (Hybrid satellite terrestrial-NNC), allows pairs of users to be simultaneously served through NOMA via the terrestrial BS link and the satellite link. Furthermore, the satellite employs random linear network coding (RLNC), within the general framework of systematic network coding (SNC), to improve the reception of the MTs when errors occur. The proposed HST-NNC, as compared to standalone NOMA, does not require additional channel state information (CSI) overheads because the satellite needs only the indices of user pairs to perform RLNC. Performance comparisons of HST-NNC with conventional orthogonal multiple access (OMA) and NOMA optimal user pairing schemes have shown that significant sum rate and BER gains can be obtained under various operating system parameters, such as varying number of MTs and different channel conditions. © 2020 IEEE.
Συγγραφείς:
Karavolos, M.
Nomikos, N.
Vouyioukas, D.
Mathiopoulos, P.T.
Περιοδικό:
IEEE Open Journal of the Communications Society
Εκδότης:
Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Λέξεις-κλειδιά:
Channel state information; Coding errors; Linear networks; Network coding; Orbits; Random errors; Satellite communication systems; Satellite links; Satellites; Systematic errors, Channel conditions; Hybrid satellites; LEO Constellation; Low earth orbit satellites; Performance comparison; Random Linear Network Coding; Terrestrial communication; Wireless transmissions, 5G mobile communication systems
DOI:
10.1109/OJCOMS.2021.3072110
