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A VLC/RF Heterogeneous Network Resource Allocation Method Based on Convex Optimization

A resource allocation and heterogeneous network technology, applied in the field of visible light communication, can solve the problems of resource allocation algorithm with many iterations and no consideration of sub-carrier power allocation, etc., to achieve good performance, good performance, and increase the system speed.

Active Publication Date: 2022-04-01
XIDIAN UNIV
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Problems solved by technology

[0007] 3) The resource allocation algorithm considering OFDM does not consider the power allocation of subcarriers;
[0008] 4) Too many iterations of the resource allocation algorithm

Method used

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  • A VLC/RF Heterogeneous Network Resource Allocation Method Based on Convex Optimization
  • A VLC/RF Heterogeneous Network Resource Allocation Method Based on Convex Optimization
  • A VLC/RF Heterogeneous Network Resource Allocation Method Based on Convex Optimization

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present invention more clear, the following will further describe in detail in conjunction with the accompanying drawings and specific embodiments. This embodiment only shows the principle description of the present invention, and does not represent any limitation to the present invention.

[0028] The present invention proposes a VLC / RF heterogeneous network resource allocation method based on convex optimization, comprising the following steps:

[0029] Step 1: Construct a VLC / RF heterogeneous network model, obtain the channel gain between the access point and the user, and the SNR of the user for each access point, and then obtain the total communication rate of the system.

[0030] Build a VLC / RF heterogeneous network model such as figure 1 , including one RF access point, N VLC access points, N+1 virtual queues, M users and M system queues. The access point is expressed as N=N RF +N VLC ={0,...

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Abstract

The invention discloses a VLC / RF heterogeneous network resource allocation method based on convex optimization. Speed, establishes an optimization problem with the goal of maximizing the total communication rate of the system, and transforms resource allocation into a process of seeking an optimal solution; uses the Lyapunov optimization method to simplify the proposed optimization problem, and adopts a convex optimization method Solve the problem to achieve resource allocation that maximizes the system communication rate; apply the obtained VLC / RF heterogeneous network allocation method based on convex optimization to indoor scenarios, and solve the problem that system stability cannot be guaranteed in the process of resource allocation. Improve the system speed, reduce the complexity of the allocation method and ensure the effect of system stability.

Description

technical field [0001] The invention belongs to the technical field of visible light communication, specifically, in a VLC communication system supplemented by an RF communication method, when a receiver can choose to access different access points, a distributed convex optimization method is used to realize VLC / RF heterogeneous The network system performs resource allocation. Background technique [0002] In recent years, with the development of mobile communication technology, the number of mobile devices and users demand for bandwidth has increased rapidly, and limited RF spectrum resources are difficult to meet the needs of wireless data traffic. Spectrum congestion has become an important problem in radio frequency technology. With the rapid development of LEDs for lighting infrastructure, VLC technology has gained enormous attention and research in research. However, a single VLC wireless communication system has problems such as small coverage, limited modulation ban...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04Q11/00
CPCH04B10/116H04Q11/0062H04Q2011/0086
Inventor 王平高睿敏施慧丽牛书强
Owner XIDIAN UNIV
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