The Research Of Video Transmission Based On IPv6 And Resource Reservation

The increasingly scarcity of IP addresses due to explodingly growing Internet users, with the wide use and development of Internet across the country, has hindered continual progress of Internet. Therefore, study and industrialization of Next Generation Internet (IPv6-based) have to be put on agenda. Meanwhile, applications of stream media technologies become more prevalent on the premise that video and audio data flow after compressed encoding will definitely play a dominant role in data transmission of Next Generation Internet, which asks for QoS such as bandwidth and delay compared with traditional data application. Multicast is enhanced in IPv6 which makes multicast-based video transmission becomes main application in Next Generation Internet for it can save lots of network bandwidth. Therefore, study on QoS of communication of video multicast based on IPv6 has active scientific and theoretic significance and practical value of social application.Overview of research background of video communication, current domestic and overseas research status of IPv6 and video communication are given. This thesis conducts an in-depth study on striking a balance between efficient use of network and insurance of diverse QoS requirement in IPv6 based video multicast communication. Main research aspects and creative achievements are as follows:First, after analyzing current Resource Reservation Protocol (RSVP), combining with IPv6, an improved resource reservation protocol, namely MRSVP adapted to various QoS request from different receivers is presented. Compared with traditional RSVP, our protocol offers solutions to these problems: on one hand, when RSVP is combined with QoS multicast routing, resource reservation is sender-oriented, while MRSVP is receiver- oriented; on the other hand, dynamic finding a new feasible path instead of the former one in MRSVP is introduced to meet QoS request of more receivers, which can make efficient use of network resource.Second, Layered filtering mechanism is introduced in MRSVP. The random dropping packets strategy adopted in tranditional RSVP when network conjestion occurs possibly drop certain critical video data, while our mechanism allows receivers to get better quality of service according to first drop video data of lower priority.In conclusion, simulation experiments are designed based on theoretic study which shows that MRSVP could not only make efficient use of network resource, but also asssure QoS of receivers when network congestion occurs.