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Multi-beam low-orbit satellite user grouping and resource allocation method

A technology of user grouping and low-orbit satellites, which is applied in the field of satellite user grouping and resource allocation, can solve the problem of few dynamic beam user grouping, achieve low average request waiting delay, improve satisfaction rate, and reduce complexity

Active Publication Date: 2022-07-26
BEIHANG UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

In the wave hopping scenario, many researchers have proposed a series of resource allocation algorithms such as dynamic time slots, power, and bandwidth, but there are few resource allocation schemes suitable for dynamic beam user grouping

Method used

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  • Multi-beam low-orbit satellite user grouping and resource allocation method
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  • Multi-beam low-orbit satellite user grouping and resource allocation method

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Experimental program
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Embodiment

[0120] Step 1: According to the user's geographic location, the optimization goal R is to maximize the average information rate of the user M , using the convex optimization idea to divide users into M groups and optimize the center point and radius of each group to obtain the grouping result G of satellite s s ={g 1,s ,g 2,s ,…,g M,s };

[0121] The grouping diagram is as follows figure 2 shown.

[0122] Optimization objective R M It is calculated by the following process:

[0123] User k goes to the center ω of group m to which he belongs m,s The distance is r k,m,s , the off-axis angle between the antenna-to-user direction and the main axis of the antenna is θ k,m,s .

[0124]

[0125]

[0126] The hopping beam is a circular beam, and its radiation pattern is simplified as:

[0127]

[0128] Gt k,s is the transmit antenna gain of the antenna in the direction of user k, θ k,m,s is the off-axis angle from user k to the main axis of the beam, J 1 ( ) and ...

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Abstract

The invention discloses a multi-beam low-orbit satellite user grouping and resource allocation method, and belongs to the field of satellite user grouping and resource allocation. The method specifically comprises the following steps: firstly, aiming at a communication scene comprising multiple low-orbit satellites and multiple users on the ground; grouping the users under each satellite by taking maximization of the average information rate of the users as an optimization target; defining the weight of each group according to a user real-time flow request, and performing distribution of working beams in the current time slot t on each user group to obtain a user group set under each satellite; further allocating power to the working beam of each group in the set according to a user channel condition and a real-time flow request, and outputting a set of allocated power; and finally, for residual working beam power resources existing in the system, allocating the residual working beam power resources to more other user group services through groups. According to the invention, the complexity of dynamic beam user grouping is reduced, and the throughput and the satisfaction rate of user requests are improved.

Description

technical field [0001] The invention belongs to the field of satellite user grouping and resource allocation, in particular to a multi-beam low-orbit satellite user grouping and resource allocation method. Background technique [0002] Compared with terrestrial communication networks, low-orbit satellite communication networks have unparalleled advantages such as providing full-time communication services without blind spots and enhancing terrestrial wireless networks. However, satellite onboard resources are limited, and it is a huge challenge to use the limited satellite resources to meet people's increasing communication needs and ensure the quality of satellite service. [0003] In order to more effectively utilize resources such as satellite power, bandwidth, and transmitting antennas, scholars at home and abroad have proposed a dynamic beam user grouping based on the user's geographic location, covering all users with fewer and smaller beams to improve the information ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0408H04B7/0426H04B7/185H04W72/04
CPCH04B7/0408H04B7/0426H04B7/1851H04W72/0446Y02D30/70
Inventor 徐桢代添雄刘锋生一凡
Owner BEIHANG UNIV