Virtual channel multiplexing scheduling algorithm based on satellite network

A technology of virtual channel and scheduling algorithm, applied in the field of satellite network, can solve problems such as lost engineering data, achieve the effect of low drop probability, improve channel utilization, and reduce delay jitter

Active Publication Date: 2012-04-04
DALIAN UNIVERSITY
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Problems solved by technology

In this case, some important engineering data may be lost; while in the simulation system, when the data packet arrives, when the multiplexer is b

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  • Virtual channel multiplexing scheduling algorithm based on satellite network
  • Virtual channel multiplexing scheduling algorithm based on satellite network
  • Virtual channel multiplexing scheduling algorithm based on satellite network

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[0017] In the three-stage multiplexing physical channel mode of emergency / synchronous / asynchronous hybrid virtual channel with movable boundary adopted by the present invention, a unified data stream can be formed to simultaneously transmit spacecraft engineering data, audio data, video data, and payload data , Delayed playback of various information such as data to process large-capacity, high-rate data, by assigning virtual channels to data of different services, and dynamically managing and scheduling the virtual channels in a time-division multiplexing manner to ensure the reasonableness of the channels Efficient use of.

[0018] The scheduling algorithm of virtual channel multiplexing based on satellite network of the present invention is characterized in that: the scheduling algorithm includes the following steps:

[0019] S1 adopts a three-stage multiplexing mode of emergency / synchronous / asynchronous hybrid, and divides a period of virtual channel scheduling into N t Time sl...

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Abstract

The invention discloses a virtual channel multiplexing scheduling algorithm based on a satellite network. The scheduling algorithm belongs to the technical field of the satellite network and is characterized in that one period of the virtual channel scheduling is divided into Nt time slots by adopting a mixed emergency/synchronization/asynchronization three-level multiplexing manner, wherein one part is used for an emergent virtual information channel, and the time slot number of the emergent virtual information channel is set as Nu; one part is used for a synchronous virtual information channel, and the time slot number of the synchronous virtual information channel is set as Ns; and one part is used for an asynchronous virtual information channel, and the time slot number of the asynchronous virtual information channel is Na. Compared with the prior art, the scheduling algorithm can process emergent data at first time taking account of the isochronism of audio and video data and flexibly and efficiently process asynchronous data with strong burstiness simultaneously, thereby improving the utilization rate of the information channel.

Description

technical field [0001] The invention belongs to the technical field of satellite network, more specifically, it belongs to a scheduling algorithm based on virtual channel multiplexing of satellite network. Background technique [0002] The virtual channel is the core of the space link sublayer. According to user needs, each virtual channel has its unique business type and business requirements. Each virtual channel time-division multiplexes physical channels, and the order in which virtual channels occupy physical channels can be dynamically managed according to a certain scheduling algorithm. Link utilization efficiency, required buffer size, data type and method of supporting real-time services should be considered when virtual channel multiplexing and buffer allocation are performed. The multiplexing mode of the virtual channel will directly affect the performance of the entire data transmission process. [0003] The virtual channel scheduling process is essentially a ...

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Application Information

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IPC IPC(8): H04B7/185H04Q11/00
Inventor 刘海燕刘春玲丁元明别玉霞郭慧
Owner DALIAN UNIVERSITY
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