document: Modeling and simulation of adaptive available bit rate voice over asynchronous transfer mode networks This article presents a modeling and simulation methodology to analyze the performance of voice quality when sent over the available bit rate service in asynchronous transfer mode networks . Sources can modify the rate at which they send traffic to the network based on the feedback carried in the resource management cells . This is achieved by changing the encoding level . As the contention increases to network resources-bandwidth in this case-sources start reducing the rate at which they generate and send traffic . The efficiency of the scheme under different scheduling/drop policies and other operating conditions and environments is evaluated using simulation modeling . Furthermore , sensitivity analysis is applied to different parameters , such as queue size and averaging interval length , to investigate their impact on the performance metrics . Results show that limiting the load to 41 % of the link capacity results in an acceptable quality
doc_bio_tags: B O B O B I I I I O O O O O O O O O B O B O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O B O O O B I I O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O O O O O O O O O O O O B B O O O O O O O O O O O O O B I O B I I O O O O O O O B I O O O O O O O O O O O O B I O O O O O
extractive_keyphrases: simulation modeling voice quality traffic feedback resource management cells encoding level queue size averaging interval length performance metrics link capacity adaptive available bit rate voice
abstractive_keyphrases: performance analysis bandwidth contention scheduling/drop policies atm networks