Implementation method for retransmitting and controlling congestion control in separating system

Abstract

The invention discloses an implementation method for retransmitting and controlling congestion control in a separating system. The implementation method comprises the following steps of: 1.calculating whether the occupying ratio of a total buffer-area queue exceeds a preset threshold value or not by a control element according to a dispatcher in a transmission mapping layer; 2. if judging that a message in the queue is in a local congestion state, redistributing the residual service time of the round by the dispatcher to meet the requirement of the queue to the greatest degree; 3. managing a module through the control element by a transmission-mapping layer module and notifying a protocol-layer module in the mode of a callback function; and constructing a congestion feedback message by the protocol-layer module and sending the congestion feedback message to the opposite end of the transmission mapping layer through the transmission-mapping layer module; and 4. delivering the congestion feedback message to the protocol-layer module through the module at the opposite end of the transmission mapping layer, and actively adjusting the sending rate of a data packet by the protocol-layer module in the modes of additive increase and multiplicative decrease. The implementation method is applied to an existing ForCES prototype system, so that the overall QoS (Quality of Service) performance of the system is improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for implementing congestion control in a forwarding and control separation system. Background technique [0002] In the past, people have always built specific networks for specific services, and have continued to transform networks for the integration of emerging services. This has always resulted in an insurmountable gap between the basic capabilities of the network and user service requirements. The main reasons are: firstly, the network is rigid, and the transformation can only rely on upgrading and expansion, and the reconstruction for new services cannot be realized; secondly, the network nodes (such as routers / switches / gateways, etc.) are closed, and the upgrading of nodes and The expansion can only be implemented by the original manufacturer, and it cannot realize the opening of the carrier level for new services. [0003] In response to the above problems...

AI Technical Summary

Problems solved by technology

However, the actual situation is that there is a typical one-to-many communication between CE and FE of ForCES, so the congestion problem is unavoidable, especially the redirection attack of FE on CE is an unavoidable problem.

At present, various existing ForCES congestion solutions mainly allocate bandwidth reasonably through TML's own scheduling mechanism, and then achieve the purpose of decongestion. A large number of practices have shown that relying on TML alone to solve congestion problems, the packet loss rate is too high , too expensive, too time-consuming, and very low efficiency

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