Matsushita Electric Industrial Co., Ltd.

Chishio Ueno

Hiroshi Yokota

Tsutomu Tanaka

Yukiko Ito

Kouji Kubota

Shinzo Doi

Tatsuro Ikoma

A video server in which each media segment file sever (MSFS) stores media segment files (MSFs) forming video data, and sequence control brokers (SCBs) installed between the video server and subscribers terminals receive video requests from the subscriber terminals, and read out the requested MSFs from the MSFSs. The readout MSFs are exchanged by an ATM switch to be transmitted to the SCBs respectively, which outputs the MSFs at predetermined intervals to the request-sender subscriber terminals.

Video server

A flow control device constructed at a switch device for connecting a plurality of ring networks for exchanging data of a cell among the ring networks. A user device for transmitting a cell carrying data is connected to each ring network, and it can transmit cells within a window counter number. Such flow control device comprises a buffer monitoring unit for monitoring the number of data in an output buffer, a regulation judging unit for comparing the number of data in each buffer with a first threshold value representing state of the buffer which is in danger of overflow, with a second threshold value representing state of the buffer which is not in danger of overflow, and outputting a regulation notice when the data number is grater than the first threshold value while outputting a regulation notice when the data number is smaller than the second threshold value, and a plurality of traffic controlling units for transmitting to the respective ring network a reset cell at a first interval when no regulation notice is received or the release notice is received while transmitting a reset cell at a second interval which is longer than the first interval when the regulation notice is received.

Flow control method

Growing community of inventors

Ikoma, Japan

Chishio Ueno