Dynamic bandwidth allocation for VBR video transmission

作     者：Ansari, N. Liu, H. Shi, Y.Q. Zhao, H. 

作者机构：Advanced Networking Laboratory Department of Electrical and Computer Engineering New Jersey Institute of Technology NewarkNJ07102 United States 

出 版 物：《Journal of Computing and Information Technology》 (J. Compt. Inf. Technol.)

年 卷 期：2003年第11卷第4期

页      面：309-317页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：This work has been supported in part by the NJ Commission on Higher Education via the NJI-TOWER project  and New Jersey Commission on Science and Technology via the NJ Center for Wireless Telecommunications 

主　　题：Bandwidth 

摘      要：To guarantee quality of service (QoS), the requirements for video transmission, such as delay and cell loss rate (CLR), are very stringent. These constraints are difficult to meet if high network utilization is desired. In this paper, dynamic bandwidth allocation algorithms are proposed to improve the bandwidth utilization. The first approach based on scene change identification, in which the bandwidth is allocated based on the maximum and mean bandwidth of the scene, is applicable to delivering pre-recorded videos. The second approach, in which the bandwidth is adjusted based on the current frame size, can be used to deliver real-time videos on-line. When the bandwidth deviation is large enough, the bandwidth renegotiation process is triggered. Compared with the CBR service, network utilization can be improved significantly for the same CLR. In general, to achieve a very low CLR and high bandwidth utilization, the renegotiation frequency may become high. Algorithms, which are proven to be effective in reducing the renegotiation frequency while keeping the bandwidth utilization at a reasonable level, are also proposed.