모바일 융합망에서 주기적 방법과 on-demand 방법을 결합한 데이터 방송 스케줄링 기법

We consider an asymmetric environment in which the forward channel is for data broadcasting and the reverse channel is for sending data requests via cellular networks, WLAN, ets. collecting statistics of requests from clients, the server partitions the data items into hot-item and cold-item sets, according to the request ratio. Hot items are sent based on a push-based scheduling. On a time slot without any hot items scheduled, the server selects a proper cold item to send in the on-demand manner. Simulation results show that our proposed algorithm allows the server to reach high successful response ratio with practically small response time.