VBR Video Traffic Smoothing Strategy in ATM Network Using Fuzzy Control

ATM is the technology to support a wide variety of multimedia services with diverse statistical characteristics and quality of service (QoS) requirements at cell and call levels. Among the various kinds of services, video service is becoming an important component of multimedia communications. Because of VBR MPEG code characteristics of I frames, B frames and P frames, VBR video data is a bursty source. The burstiness of VBR video transmission is one key factor to effect quality of service in ATM network, such as cell loss ratio, delay and jitter. In this paper, we focused on dealing with the VBR MPEG video bursty traffic to provide a more suitable QoS. the article obtained the constraint condition of VBR video transmission rate based on the predictions of VBR video sequences and buffer sizes. An adaptive video traffic smoothing strategy is proposed, which monitor the constraint condition of VBR video transmission rate and smooth maximally video data flow over ATM network using fuzzy control system. To retain efficient network resource usage, simultaneity we designed share memory in place of individual buffer as the channel buffer in ATM multiplexer. The adaptive smoothing strategy on VBR video transmission in ATM network is demonstrated in terms of transmission rate and burst level. The result shows that the strategy is effective.