Adaptive Multicast FEC Coding for Variable Wireless Channels

The patent implements dynamic FEC adaptation where the FEC code rate is adjusted based on real-time channel conditions of multiple receivers. The system transitions from a static fixed FEC approach to a dynamic adaptive approach, allowing the FEC strength to vary according to actual receiver needs, thus improving bandwidth efficiency while maintaining reliability for receivers with poor channel conditions.

The patent applies different FEC code rates to different receivers based on their individual channel conditions. Instead of using a uniform FEC code for all receivers, the system tailors the FEC protection level to each receiver's specific needs, providing stronger protection only where necessary and weaker protection where channel conditions are good, thereby optimizing overall system efficiency.

The patent segments the adaptive FEC process into distinct functional modules: channel condition estimation at each receiver, feedback transmission mechanism, and FEC code selection at the transmitter. This modular segmentation allows each component to be optimized independently and simplifies the overall system architecture by clearly defining interfaces between components.

The patent implements a feedback mechanism where receivers report their channel conditions back to the transmitter, enabling the transmitter to adaptively select appropriate FEC codes. This feedback loop is essential for achieving adaptive FEC performance while the system provides structured feedback protocols to manage the complexity of multi-receiver channel assessment.