| 摘要 |
<p>The invention relates to flow control in data transmission in telecommunications systems, particularly in wireless telecommunications systems. In the present invention flow control information is tunnelled over a connection leg (lu) which does not support flow control on a lower transmission protocol layer (ATM) underlying a user level (LAC). The nodes (RNC, 3G MSC) at the both ends of the leg (lu) are arranged to use the flow control information to control the data flow on the lower transmission protocol level (ATM) of the leg. In other words, the transmission of new data on the lower transmission protocol level (ATM) is ceased or the data rate decreased when the flow control information activates the flow control in the transmitting node, and similarly, the transmission of new data on the lower transmission protocol level (ATM) is restarted or the data rate increased when the conveyed flow control information deactivates the flow control. The need of flow control may be recognized from the receiving buffer status on the lower transmission protocol level or from incoming flow control information received over the following leg of the connection in the downlink direction.</p> |
