An optimization Strategy of Network Bandwidth Utility in Transmitting Multi-Channel Surveillance Video Information
Hou Ya-xin · Zhongguo tiedao kexue · 2006
The optimal transmission strategy of multi-channel surveillance video information for passenger dedicated railway line in a network with limited bandwidth is studied according to the characteristics of the security monitoring and control system for transportation on passenger dedicated railway line.The bit rates control and congestion avoidance mechanics based on real-time collecting source network video flow is put forward and the control model is established based on this system structure.The flow adjusting arithmetic is delivered by means of automatic control theory.Moreover,the equipoise principle of bandwidth distribution is discussed.The dynamic and adaptive distribution arithmetic of bandwidth is presented according to the priority of video sources.The adaptive adjusting factors β and γ are introduced for updating α of each channel dynamically according to control error.The test data show that 97.4% bandwidth of network bottleneck is utilized and adjusting time is about 5 ms.