Data transmission method for low-orbit satellites oriented to mission delay constraints

A data transmission method and technology of low-orbit satellites, applied in transmission systems, radio transmission systems, network traffic/resource management, etc., can solve problems such as lack of task delay constraints, loss of timeliness, and excessive delay

Active Publication Date: 2021-08-20
XIDIAN UNIV
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  • Claims
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Problems solved by technology

One is the lack of consideration of task delay constraints, that is, the fact that the services buffered by satellites also need to be transmitted within the specified time is not considered, which will cause the end-to-end delay of some data to be too large and lose its timeliness The second is that this method only introduces satellite mobile storage to improve network throughput, and does not obtain the optimal cooperation method between satellite storage resources and inter-satellite link resources, wasting some satellite wireless link resources

Method used

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  • Data transmission method for low-orbit satellites oriented to mission delay constraints
  • Data transmission method for low-orbit satellites oriented to mission delay constraints
  • Data transmission method for low-orbit satellites oriented to mission delay constraints

Examples

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Effect test

Embodiment 1

[0058] Embodiment 1, can finish k max A data transmission method for low-orbit satellites with mission delay constraints carried by hopping integers

[0059] The example of the present invention illustrates the implementation process of the present invention from a single-track Iridium satellite communication network scene. Suppose there are M=11 satellite nodes in the network {Sa 1 ,Sa 2 ,…Sa 11} are located on the same orbit with an inclination angle of 90° and a height of 780km, and the storage capacity of each satellite is 40Gb. According to the initial position of the satellite, 11 ground station sets can be obtained {GS 1 ,GS 2 ,…GS 11} position information, and establish a ground-fixed star-ground visible relationship. The transmission capacity of the inter-satellite link is 25Mbps, and the transmission capacity of the satellite-ground link is 50Mbps. The spatial information network will complete the end-to-end transmission of the service according to the initial...

Embodiment 2

[0151] Embodiment 2, can finish k max A data transmission method for low-orbit satellites with mission delay constraints carried by hopping integers

[0152] The spatial information network scenario of this embodiment is the same as that of Embodiment 1, but the generation time CT of the data packet is different, and the data packet needs to use a transmission method different from that of Embodiment 1. Its implementation steps are as follows:

[0153] Step 1, initialize the satellite collection of the spatial information network, and establish the inter-satellite topology relationship.

[0154] The specific implementation of this step is the same as step 1 of Embodiment 1.

[0155] Step 2. Calculate the position of the ground station under each orbit and deploy the ground station on the surface of the earth to construct a fixed time-varying star-ground connection relationship on the ground.

[0156] The specific implementation of this step is the same as step 2 of Embodime...

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Abstract

The invention discloses a space information network data transmission method based on task delay constraints, which mainly solves the problem that the prior art cannot optimize the use of satellite mobile storage and inter-satellite link resources according to different task delay constraints. The implementation plan is: obtain the satellite collection of the target space information network, and deploy the corresponding ground station collection; construct a fixed time-varying satellite-ground connection relationship on the ground according to the satellite movement law and the ground station collection; initialize the network parameters and mission information of the space information network ; According to the generation time of the task, the task delay constraint and the time-varying star-ground connection relationship, calculate the transmission switching time of each data packet to optimally utilize network resources; the spatial information network forwards data according to the transmission switching time of each data packet and the network state Bag. The invention can maximize the use of satellite mobile storage resources, improve network throughput, alleviate network congestion, and can be used to transmit services with different time delay constraints.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a low-orbit satellite data transmission method, which can be used to transmit services with different time delay constraints and improve the satellite network throughput. Background technique [0002] The space information network consists of multiple satellites and satellite constellations operating in orbit to form a backbone communication network. It has the outstanding characteristics of wide coverage, flexible networking, fast network construction, and no geographical restrictions. Space information network plays an increasingly important role in the fields of national security, aerospace, environmental monitoring, traffic management, industry and agriculture. With the development of space wireless communication technology, satellites can not only establish connections with ground stations, but also establish reliable communication links between satellite nodes. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/02H04W28/08H04W40/22H04B7/185
CPCH04B7/18584H04W28/0236H04W28/0289H04W28/08H04W40/22
Inventor 白卫岗王占伟盛敏周笛吴家鑫毕媛媛鲁都都
Owner XIDIAN UNIV
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