An improved equation based rate adaptation scheme for video streaming over UMTS

Streaming video has experienced phenomenal growth owing to the extensive research in video transmission over wireless networks. This paper describes an improved equation based rate adaptation (EBRA) scheme for video streaming over universal mobile telecommunications system (UMTS). In our method, transmission rate is determined as a function of packet size ( s ), round trip time ( rtt ), loss event rate ( p ) and two novel control parameters for congestion window adjustment ( α and β ). Our mechanism is compatible with unpredictable wireless channel conditions and provides smooth and flexible sending rate and slowly responsible congestion control by dynamic modification of mentioned parameters. We have simulated this method in UMTS and our results indicate that EBRA in addition to network stability increases throughput with low variations.