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Closed-loop congestion control method based on cross-layer cache management in broadband multimedia satellite system

A memory management and satellite system technology, applied in the field of congestion control, can solve the problems of poor congestion control effect and high channel bit error rate, and achieve the effects of good congestion control effect, low channel bit error rate and short delay.

Inactive Publication Date: 2009-12-23
HARBIN INST OF TECH
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the existing congestion control method in the broadband multimedia satellite system has poor congestion control effect due to the long delay and high channel bit error rate in the satellite system, thus proposing the broadband multimedia satellite system based on the Closed-loop Congestion Control Method for Hierarchical Buffer Memory Management

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  • Closed-loop congestion control method based on cross-layer cache management in broadband multimedia satellite system
  • Closed-loop congestion control method based on cross-layer cache management in broadband multimedia satellite system
  • Closed-loop congestion control method based on cross-layer cache management in broadband multimedia satellite system

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specific Embodiment approach 1

[0030] Embodiment one: the closed-loop congestion control method based on cross-layer cache memory management in the broadband multimedia satellite system, it is completed by the following steps:

[0031] Step 1. In a broadcast time interval, the terminal or the ground station sends an ATM cell flow to the satellite channel, and the ATM cell flow is transmitted to the satellite through the uplink of the satellite channel, and the front end of the ATM cell flow is carried out through the satellite. After processing and exchanging, it is divided into four types of priority data streams, and the four types of priority data streams are respectively stored in the corresponding four types of cache memories;

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Abstract

A closed-loop congestion control method based on cross-layer cache management in a broadband multimedia satellite system relates to congestion control methods in the broadband multimedia satellite systems, solving the problem of poor congestion control effect brought about by long time delay and high bit error rates of channels in current broadband multimedia satellite systems. The method comprises the following steps: the satellite divides ATM cell streams sent out by a terminal station or a ground station into four categories according to the priority, stores the ATM cell streams in corresponding caches respectively and carries out cross-layer detection on each cell stream in the caches; if incorrect cells exist, the whole group to which the incorrect cells belong is discarded; conversely, cache management is carried out on the cells; the total number of the discarded cells and the total capacity of the cells in the caches are recorded; the congestion parameters in the broadcasting time interval are computed; the congestion parameters are broadcast to each terminal station or ground station and the terminal station or ground station adjusts the transmit velocities of the congestion parameters to realize easing the onboard congestion. The method of the invention is suitable for the communication transmission process in the broadband multimedia satellite system.

Description

technical field [0001] The invention relates to a congestion control method in a broadband multimedia satellite system. Background technique [0002] The development of broadband multimedia satellite system has become one of the new hotspots of current communication. But to meet the needs of the future, it is necessary to adopt a geostationary satellite with on-board processing (OBP, On-Board Processing) and on-board switching (OBS, On-Board Switching) functions. However, compared with the ATM (Asynchronous Transfer Mode) switching system of the terrestrial network, the resources on the star are limited and the satellite transmission delay is relatively large. If the feedback closed-loop control strategy on the ground is directly adopted, the congestion control information of each connection is transmitted from the sending end to the receiving end. This will not only bring a large transmission delay for the satellite, but also occupy too much on-board buffer memory and upli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/00H04B7/185H04L47/32
Inventor 肖丽萍顾学迈郭庆仲伟志
Owner HARBIN INST OF TECH
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