An adaptive FEC with QoS provisioning for real-time traffic in LEO satellite networks

This paper presents an adaptive forward error correction (AFEC) protocol that provides a reliable communication service for real-time trafflc over low-earth orbit (LEO) satellite networks. In time-varying wireless links, such as LEO satellite networks, a reliable channel estimation scheme with an appropriate code selection technique is essential for adaptive error-control systems. This paper proposes a new channel estimation scheme that uses receiverinitiated messages (ACKs, NAKs, and INCs). These messages feed back to the transmitter which then selects the code rate for sending ackets. In addition, the scheme uses the concept of a zynamic transmittable code set by adjusting the maximum code rate in the set of possible codes from which the transmitter can select. In terms of throughput (from network provider’s viewpoint) and packet error rate (from subscriber’s viewpoint), performance results show that the proposed scheme guarantees the quality of service (QoS) requirements of real-time applications. Ke wordsError-Control, Adaptive FEC, Real-time Traffic, LkO Satellite Network.