发明名称 |
Flow control mechanism for block switching nodes |
摘要 |
In a communication network comprising block switching nodes interconnected by transmission links, a flow control mechanism is provided in each switching node for regulating the flow of addressed data blocks or messages. A hardware look-ahead mechanism effective within each node tests for each data block received from a link and buffered at an input port, whether it can be accepted at the appropriate output port of the same node for further transmission. A token mechanism effective over links permits maintenance at each output port of a node of an indication whether any data block can be accepted in the input port at the other end of the respective link. By the combined operation of look-ahead mechanisms and token mechanisms the flow of addressed messages in a direction where the transmission path is already filled up is prevented. This has a positive smoothing effect on overall traffic flow where short-time or local overloads occur.
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申请公布号 |
US4380063(A) |
申请公布日期 |
1983.04.12 |
申请号 |
US19810272143 |
申请日期 |
1981.06.10 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORP. |
发明人 |
JANSON, PHILIPPE A.;MUELLER, HANS R.;ROTHAUSER, ERNST H. |
分类号 |
H04L12/56;(IPC1-7):H04J3/00;G06F15/16 |
主分类号 |
H04L12/56 |
代理机构 |
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主权项 |
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地址 |
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