Title :
Rate-based flow control of video services in ATM networks
Author :
Dagiuklas, A. ; Ghanbari, M.
Author_Institution :
Dept. of Electron. Syst. Eng., Essex Univ., Colchester, UK
Abstract :
A rate-based flow control method for ATM networks carrying video services is presented. In the proposed method the queue occupancy of each switching node is monitored against congestion and the users are advised to adjust their generated bit rates accordingly. Two threshold levels in the buffer are used to distinguish the congested state from the normal state. The impact of the threshold levels on both the network and the received image quality are presented. It is demonstrated that at a congestion threshold of 50% of the buffer capacity the overall network performance and received image quality are optimised. Discrimination between the normal and congested states is made when the normal threshold level is 80% of the congested threshold level
Keywords :
asynchronous transfer mode; buffer storage; channel capacity; decoding; queueing theory; telecommunication congestion control; telecommunication networks; video coding; visual communication; ATM networks; buffer capacity; congested state; congested threshold level; congestion control; congestion threshold; decoded image quality; generated bit rates; network performance; normal state; normal threshold level; queue occupancy; rate based flow control; received image quality; switching node; video coding; video services; Asynchronous transfer mode; Bit rate; Decoding; Image quality; Intelligent networks; Propagation delay; Quantization; Size control; Switches; Systems engineering and theory;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.594375
