User access method and device for minimizing transmission delay in space-air-ground convergence network

A converged network and transmission delay technology, applied in the field of air-space-ground converged network, can solve problems such as communication link interruption

Active Publication Date: 2021-09-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem existing in the prior art that the ground user-air platform communication link in the space-space-ground fusion network may be interrupted, this application provides a user access method and device for minimizing transmission delay in the space-space-ground fusion network

Method used

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  • User access method and device for minimizing transmission delay in space-air-ground convergence network
  • User access method and device for minimizing transmission delay in space-air-ground convergence network
  • User access method and device for minimizing transmission delay in space-air-ground convergence network

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Experimental program
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Embodiment approach 1

[0126] Implementation Mode 1: Refer to figure 1 This embodiment will be described. A user access method for minimizing transmission delay in an air-space-ground fusion network described in this embodiment includes the following steps:

[0127] Step 1: According to the network topology structure, transmission power, fading loss, antenna gain of the transceiver end and other parameters of the air-space-ground fusion network at time t, obtain the signal receiving form of the aircraft receiving end and calculate the receiving signal-to-noise ratio of the aircraft end; at the same time, obtain the signal of the satellite receiving end Receive form and calculate the receiving signal-to-noise ratio of the satellite terminal;

[0128] Step 2: According to the channel conditions and the threshold value of the signal-to-noise ratio at the receiving end, the probability density function of the Rice channel coefficient is used to calculate the interruption probability of the ground user...

Embodiment approach 2

[0182] Implementation mode two: refer to the attached figure 1 Describe this implementation mode. This implementation mode provides a user access device that minimizes transmission delay in an air-space-ground integrated network, including:

[0183] A device for obtaining the signal reception form of the aircraft receiving end and calculating the receiving signal-to-noise ratio of the aircraft end according to the network topology, transmission power, fading loss, antenna gain of the receiving end and other parameters of the air-space-ground fusion network at time t; at the same time, the device can also Obtain the signal receiving form of the satellite receiving terminal and calculate the receiving signal-to-noise ratio of the satellite terminal;

[0184] A device for calculating an outage probability of a ground user-aircraft communication link and an outage probability of a ground user-satellite communication link by using a probability density function of the Ricean chann...

Embodiment approach 3

[0247] Embodiment 3: This embodiment uses simulation to compare the user access method that minimizes the transmission delay in the air-space-ground fusion network described in the present invention with the existing similar methods, and then verifies the present invention and the existing similar technologies comparative advantages.

[0248] Table 1 shows the parameter settings used in the simulation.

[0249] Table 1 Simulation parameter settings

[0250]

[0251] The simulation results in the case of the above simulation parameters are:

[0252] attached Figure 4 It is a comparison chart of the average delay before and after the introduction of the aircraft in the air-space-ground fusion network; for simplicity, only the situation that the aircraft and the satellite are within the communication range of the ground user node at the same time is considered in the simulation. It can be found that when there are only satellites in the network, the average delay is the la...

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Abstract

The invention discloses a user access method and device for minimizing transmission delay in a space-air-ground convergence network, and relates to the technical field of space-air-ground convergence networks. At present, a space-air-ground fusion network is adopted to assist data transmission process summarization in remote areas, and the link state is always dynamically changed, so that the reliability of a communication link becomes poor. According to the method, signal receiving forms of aircraft and satellite receiving ends are obtained respectively, the receiving signal-to-noise ratio of the aircraft end is calculated, then the outage probability of a ground user-aircraft and satellite communication link is obtained, then the average sending frequency of user-aircraft and satellite data packets is calculated, data transmission time delay is obtained, and when a user faces various air platforms, a user access method with the purpose of minimizing transmission delay is planned, an optimization problem is decomposed into some independent sub-problems, and a user access result is obtained according to a heuristic user access algorithm provided by the method. The method can be widely applied to the field of space-air-ground fusion networks.

Description

technical field [0001] The present invention relates to the technical field of space-space-ground fusion network, in particular to a user access method for minimizing transmission time delay in space-space-ground fusion network. Background technique [0002] The current mobile communication has developed to the fifth generation, and the effectiveness and reliability of the communication system have reached an unprecedented new stage. For commercial reasons, mobile network operators tend to build traditional cellular base stations in densely populated areas. At present, the coverage rate of terrestrial broadband wireless signals is only 10%, and data transmission in remote areas is still relatively difficult, and there is still a long way to go to achieve the goal of seamless communication coverage. [0003] The air-space-ground fusion network greatly expands the communication coverage of the traditional terrestrial cellular network due to the introduction of satellites, air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L1/18H04W28/08H04W74/02H04W76/10
CPCH04B7/18508H04L1/18H04W28/0975H04W76/10H04W74/02
Inventor 孟维晓陈倩李殊勋李阳
Owner HARBIN INST OF TECH
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