Due to the continued popularization of broadcast and communications integration environments, streaming delivery using broadcast and communication is attracting attention. In streaming delivery on the environment, clients concurrently receive streaming data such as music or movies from broadcasting and communication systems. Although these systems compensate for the demerits of each other, the interruption time is lengthened if the system does not deliver the data efficiently. In our proposed method, the system produces a broadcast schedule of streaming data that considers communication bandwidth. In this research, we confirmed that extra bandwidth that gives shorter interruption time differs from communication bandwidth. Our proposed method reduces the interruption time by finding the extra bandwidth.