A communication controller transfers data cells and a control data cell representative of a target transmission rate from a system memory to a host; however, when a bus between the system memory and the communication controller is congested, the actual transmission rate for the data cells becomes smaller...http://www.google.com.hk/patents/US6006270?utm_source=gb-gplus-share專利 US6006270 - Communication system with time stamp controller for regulating datatransmission rate
