Control method and device for cell switching

Abstract

The invention discloses a control method and device for cell switching. The method comprises the following steps of: determining to receive a link application cell from each access line card by a switching board card, wherein the link application cell carries application time stamp information; distributing links according to each piece of application time stamp information by the switching board card, wherein the links are links by which the switching board card is connected with each exit line card; and transmitting a data cell according to the allocation result of the links by each access line card. According to the control method and device disclosed by the invention, the problems of time delay and jitter in the cell switching process are solved; the flow at the input end of the switching board card is controlled; and the requirement for cache of the exit line card and the difficulty of data package reorganization are reduced.

Description

technical field

[0001] The present invention relates to the field of communications, in particular to a method and device for controlling cell exchange. Background technique

[0002] figure 1 The basic structure diagram of the switching network is given. The switching network is composed of two parts, line cards and switching boards. The line cards include: entry line cards and exit line cards.

[0003] In order to meet the requirements of switching control, current high-speed routers usually use a fixed-length cell switching mechanism, for example, splitting an arriving IP packet into multiple fixed-length cells. In the switching board, cells can reach the egress line card through multiple paths, and the delays of different paths are different, which causes multiple cells belonging to a data packet to arrive at the egress line card out of order.

[0004] And when multiple ingress line cards send data to an egress line card at the same time, the cells of different data pac...