Congestion Control Method of Satellite Processing System Based on Information Hiding

Abstract

A satellite processing system congestion control method based on information hiding combines congestion control with information hiding technology and transmits congestion control information to a ground terminal by the aid of a method for hiding the congestion control information in business data. When a satellite exchanger congests, types of transmitted control information are determined according to congestion conditions and mainly comprise warning information and a discarding notification message, then the congestion control information is integrated into the business data to be transmitted by the aid of an information hiding method and transmitted out according to corresponding output ports, the congestion control information is extracted by a hiding removal method after the business data comprising the congestion control information are received by the ground terminal, and the transmission speed is relieved or data transmission is directly stopped according to requirements of the control information. According to the method, satellite state information can be informed to the ground terminal without increasing additional physical resources or discarding the data in a buffer cache, link resources are saved, and performances and normal running of a satellite-borne processing exchange system are ensured.

Description

technical field [0001] The invention belongs to the field of satellite communication, and relates to a method for controlling and transmitting congestion information of a satellite processing system. Background technique [0002] On-board switching is one of the development trends of satellite communications. Using on-board switching technology, multi-beam switching of satellites can be performed to facilitate communication between multiple ground stations, thus forming a wireless communication network integrating space and ground. Therefore, satellite switching technology will greatly promote the development of satellite communication in my country. [0003] Packet switching includes ATM switching and IP switching. Taking ATM switching as an example, in order to achieve the best resource utilization in satellite ATM switching, all resources reserved for each user are not allocated according to the peak data rate, but according to the connection admission control (CAC, Con...

AI Technical Summary

Problems solved by technology

[0005] The technical problem of the present invention is: to overcome the problem in the prior art that the on-board status information cannot be notified to the ground terminal when the switchboard is congested, and to provide a method for controlling congestion in a satellite processing system based on information hiding. Integrating into business data, using the method of information hiding to transmit congestion messages, without adding additional physical resources, and without discarding the data in the buffer area, the status information on the star can be notified to the ground terminal, which saves link resources , also ensures the performance and normal operation of the on-board processing and switching system

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