Scheduling control device and method according to service quality level of broadband integrated information network subscriber access device

摘要

The present invention relates to an ATM (Asynchronous Transfer Mode) cell for each line and a virtual connection, which is input through a standard connection, and which is used for a broadband access network constituting a broadband access network in a broadband integrated information network, And a scheduling control device and method for controlling the output order of input ATM cells for each line connection when multiplexing according to a quality of service (QoS) class of each connection service, Cells input to the access device are divided into four priorities and are stored in independent buffers. The order information of the cells to be output is generated according to the service level information related to the input cells, the buffer status, In order to prevent the increase of the cell loss rate caused by the low priority, In order to improve the cell delay characteristics for services with isochronous traffic and reduce the probability of buffer overflow, the cell loss rate is reduced by decreasing the probability of the buffer overflow.