| 摘要 |
<p>A wireless base station device, connected to a higher-level station device via a wired line, comprises baseband processors 11, one for each virtual link 21 to which user data flows belong. In the baseband processor 11, a congestion monitor 51 monitors the reception bandwidth usage rate of a virtual link allocated to each cell for detecting congestion and, upon detecting congestion, sends a notification to a flow controller 57. A user traffic distributor 52 distributes a received user traffic into the traffic flow of each user and, at the same time, extracts, for each user data flow, the buffer holding amount in the higher-level station device where user data flows are multiplexed and sends a notification to the flow controller 57. The flow controller 57 manages the data flow of each user and, in response to a congestion notification from the congestion monitor 51, requests the higher-level station device to reduce the rate of a user data flow in descending order of rates beginning with a data flow with a highest rate.</p> |
