Performance Analysis of IoT-based Overlay Satellite-Terrestrial Networks under the Interference
Abstract : In this paper, we consider an overlay satellite-terrestrial network (OSTN) where an opportunistically selected terrestrial internet-of-things (IoT) network assists the primary satellite communications as well as accesses the spectrum for its own communications under hybrid interference received from extra-terrestrial sources (ETSs) and terrestrial sources (TSs). Herein, the IoT network adopts power-domain multiplexing to amplify-and-forward the superposed satellite and IoT signals. Considering a unified analytical framework for shadowed-Rician fading with integer/non-integer Nakagami-m parameter for satellite and interfering ETSs links along with the integer/non-integer Nakagami-m fading for terrestrial IoT and interfering TSs links, we derive the outage probability (OP) of both satellite and IoT networks. Further, we derive the respective asymptotic OP expressions to reveal the diversity order of both satellite and IoT networks at high signal-to-noise ratio (SNR). We show that the proposed OSTN with adaptive power-splitting factor benefits the IoT network while guaranteeing certain quality-of-service (QoS) of satellite network. We verify the numerical results by simulations.
? NOMA also does not require significant modifications in the existing network architecture, thus, operating with virtually no change in the cost of deployment and operation of the network.
? Since obstacles exist in the link from terrestrial users to satellite and it limits the transmission of the line of sight (LoS).
? However, a limited energy situation exists in the relay node in this C-NOMA. It is hard to replace the battery and/or there is no power line.
? The overall communication operates in two orthogonal time slots and it is considered that no direct link exists between the satellite and the NOMA users.
? Some works have recently dealt with the issue of CSI acquisition in STNs, it remains an open research problem of great interest.
? It is quite intuitive that the interference originating from ETSs may have significant impact on the performance of STNs since SR fading is dominated by the line-of-sight (LoS) propagation.
? Nevertheless, we depict the impact of various system and channel parameters on the performance of considered OSTN.
? The energy from the surrounding environments can be reused to address this problem, i.e., via an energy harvesting technique.
? Although mobile satellite networks can prove advantageous in disaster management, the issues of operation costs and transmission capacity cannot be ignored in such networks.
• An HSTRN using the NOMA scheme was proposed, in which a user with better channel condition is adopted as a relay node and forwarded the information to other users.
• The satellite in the downlink is considered in the scenario in which a relay node is employed to retransmit the NOMA signal from the satellite.
• To validate the effectiveness of the proposed system model, and the closed-form outage probability expressions are derived.
• However, works mainly conducted performance evaluation based on a fixed power source at the relay, without considering energy harvesting strategy in a scenario where relay can harvest energy from the satellite directly.
? The performance of STNs has been actively investigated in literature by taking into account decode-and-forward (DF) and amplify-and-forward (AF) relays.
? The work in has investigated the performance of an integrated STN. In, the performance of dual-hop multi-antenna STNs has been analyzed.
? The works in and have investigated the secrecy performance of STNs with ground and UAV relays, respectively.
? Moreover, the outage performance of multiuser STNs with imperfect channel state information (CSI) was assessed in the presence of interfering TSs.
? It is quite intuitive that the interference originating from ETSs may have significant impact on the performance of STNs since SR fading is dominated by the line-of-sight (LoS) propagation.
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