| 摘要 |
A cell switch comprises a plurality of switch ports (2.n), each one connected to a number of user terminals, for sending and receiving cells of the user terminals, which cells contain payload and addressing information. A switch core (4) interconnects the switch ports for enabling communication between them. Tagging means are provided in the switch ports for creating, based upon the addressing information of a cell (17) received from a user terminal, a tag (14) belonging to the cell and containing routing information enabling routing of the cell through the switch core. Means are provided for sending tags to the switch core in advance of corresponding cells, one tag for each cell. Scheduling means in the switch core receive the tags sent in advance and create, based upon the routing information included therein, scheduling information regarding sending times of the respective cells from the switch ports for scheduling such that during these sending times the cells can be sent to the destination ports without conflict arising with other cells. The scheduling information is sent to the switch ports of origin of the cells, and the cells are retained in the switch ports until their respective scheduled sending times appear. |
