Patent ID: 7457238
Filing Date: 2008-11-25
Classification: H04L

Abstract:
1. A transmission system for transmitting signals under flow control, comprising: a flow control instruction sender transmission apparatus having a data receiver for receiving data and a flow control instruction sender having at least one of two functions including a normal transmission mode to send a flow control instruction for flow control over a congestion state if an event, such as the occurrence of a congestion or the removal of a congestion, occurs when the data receiver receives data, and an autonomous transmission mode to select one of a plurality of congestion states at present in each period and autonomously send a flow control instruction corresponding to the selected congestion state, the flow control instruction sender being arranged to preferentially send a flow control instruction in the normal transmission mode in which a congestion actually occurs or is actually removed, when timings of the normal transmission mode and the autonomous transmission mode coincide with each other; and a flow control instruction receiver transmission apparatus having a data sender for sending data and a flow control instruction receiver for receiving a flow control instruction to perform flow control by stopping sending data and sending data, wherein the normal transmission mode and the autonomous transmission mode work independently, and when the timings of the normal transmission mode and the autonomous transmission mode coincide each other, the flow control instruction sender preferentially sends a flow control instruction for the congestion state in the normal transmission mode.