级联在校园网视频直播中的应用研究

In order to ensure our school a smooth live broadcast in the 60th anniversary celebration, after analyzing the characteristics of the campus network, this paper proposes a live video transmission model based on cascade, and with the model the paper gives a detailed description in the several following aspects: the bandwidth allocation of cascade sever, the relationship between the depth of cascade sever and delay, and how to deal with when the cascade have a failure and so on. Under the NS2 simulator environment, the relationship of cascade depth and the delay is simulated, from which we obtain the anticipated results and know what should pay attention to in the actual deployment. The result of live broadcast proves the cascade can be used in multiple campuses network effectively.