Hybrid type-II ARQ/AMS supported by channel predictive scheduling in a multi-user scenario

A combination of radio channel predictive time slot scheduling and link layer FEC/ARQ (forward error correction/automatic repeat request) with adaptive modulation, for IP (Internet protocol) packet data is presented and evaluated through simulations. The main idea is to make use of the fast fading characteristics of the radio channel through time slot scheduling, instead of alleviating the effects with over-pessimistic channel coding. By using information about the individual data streams, together with information about future wireless channel characteristics for the different mobile hosts, it it possible to plan the transmission to achieve a good quality of service while utilizing the scarce spectrum efficiently. The simulated results confirm that out proposed system can provide a high throughput while maintaining the BER and the delay low for the majority of the users.