单源多点视频组播系统的研究与设计
Multi-Points Multicast System
Abstract
The traditional Video system can not meet the network customer’s
requirements in recent years because of severely bandwidth waste and
lower efficiency. Therefore the multicast is put forward. But the
application layer multicast is still on the step, different application
layer multicast architectures are still accordance with some solutions,
these architectures sustain the different applications and the
performances of network protocols are different. This dissertation
studies application layer multicast in deeply and combines with my
conditions, uses application layer multicast technology, implements
single source multi-points Video system. In this paper, it takes the
following research:
Firstly, it studies the key technologies related to multi-points
Video system and requirements anal sizes from the whole designs,
puts forward the implementation ideas and the whole architecture of
application layer multicast system. Then it expounds the function
module of the whole system.
Secondly, it sets forth the application background of this project,
chooses multicast protocol and multicast prototype, studies the
creating group, join group, leave group and invalidation process of
node of SSALMP protocol, realizes the four process which are Free
pastry module, multicast tree management, datagram process and
send/receive .And comparing the IP multicast congestion control and
application layer multicast congestion control, this paper puts forward
hop-by-hop congestion control schema in oriental stream media. At
last, it codes every modules using JMF.
Finally, it tests the whole system including two aspects: function
test and hop-by-hop congestion control test. From the tests, it
indicates that the application layer multicast system can meet the
requirements of multicast system.
Key Words: application layer multicast ;Video multicast; Media;
SSLAMP;JMF
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