Bandwidth adaptive multimedia streaming for PDA applications over WLAN environment

Network management and bandwidth adaptation are important areas for wireless multimedia streaming applications. We have developed the managed wireless network with bandwidth adaptive media streaming technique for IEEE 802.11x applications. The unique contributions of this project are: (1) a real-time detection of wireless bandwidth change via XML/Java based SNMP system, (2) dynamic adaptation of streaming media to optimize the quality, and (3) coordination and performance optimization among SNMP server, media streaming server, wireless AP points, and wireless clients. Based on this technique, we are able to deliver wireless streaming services adapted to the bandwidth change. The SNMP server, media-streaming server, and wireless AP points are coupled and operated in a well-coordinated fashion. The software implementation was written in the combination of Java, XML and C#. The bandwidth adaptation is user transparent while the media streaming settings are modified on the fly. The experiments are conducted and they confirmed our design.