Beam optimization method based on user discovery stage in millimeter wave system

A beam optimization and millimeter wave technology, applied in the field of communication, can solve problems such as increasing search delay and affecting system control overhead, and achieve the effect of simplifying analysis, solving the problem of balancing search delay and system capacity, and optimizing system performance.

Active Publication Date: 2018-12-07
XI AN JIAOTONG UNIV
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Problems solved by technology

However, directional search will increase the search delay, thereby affecting the control overhead of the system

Method used

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  • Beam optimization method based on user discovery stage in millimeter wave system
  • Beam optimization method based on user discovery stage in millimeter wave system
  • Beam optimization method based on user discovery stage in millimeter wave system

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Embodiment Construction

[0065] The present invention provides a beam optimization method based on the user discovery stage in the millimeter wave system, comprising the following steps:

[0066] S1. Model the system using random geometry, assuming that the base station location follows a specific probability distribution, determine the system path loss and beamforming gain model, and study the average performance of the millimeter wave communication system;

[0067] Assuming that the distribution of base stations obeys the Poisson point process Φ: (Poisson point process, PPP) whose density is λ, the users also obey the PPP independent of the base station. Take a typical user at the origin of the coordinate system to analyze network performance.

[0068] The path loss L(r) of the mmWave system is:

[0069] L(r)=Cr -α

[0070] Among them, C is a constant, which refers to the path loss per unit distance, r is the distance between the base station and a typical user, and α is the path loss index.

[...

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Abstract

The invention discloses a beam optimization method based on a user discovery stage in a millimeter wave system, comprising: modeling a millimeter wave communication system by adopting a random geometric method, and determining a path loss of the millimeter wave communication system and a beamforming gain model to obtain a receiving signal of the millimeter wave communication system; establishing coverage and capacity expressions of the millimeter wave communication system, comparing and analyzing the coverage performance of the system without considering interference and noise; determining therelationship between the capacity of the millimeter wave communication system and the search delay with the beam width as the intermediate quantity, optimizing the beam width to obtain the optimal system performance; using the beamforming technique in the user discovery phase of the millimeter wave to obtain the optimal beam width, and scanning the entire beam space for user search. By optimizingthe scanning beam width of the user discovery phase of the millimeter wave system, the invention solves the problem of the balance between the search delay and the system capacity, and obtains the optimal system performance, thereby saving the cost.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a beam optimization method in a user discovery stage based on a millimeter wave system. Background technique [0002] With the rapid development of the modern information society, various new mobile services are constantly emerging, and the number of connected smart terminal devices and wireless data traffic are increasing exponentially. The International Telecommunication Union determined the target capability index of 5G in 2015, which requires the peak rate to reach 20Gbit / s. In order to meet the requirements of 5G multi-gigabit data transmission rate, increasing the signal transmission bandwidth is the most direct and effective way. The traditional frequency bands below 3GHz are already congested, and are mainly allocated to commercial cellular mobile communication systems, wireless local area networks, wireless personal area networks, radio and television,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04W16/28
CPCH04B7/0617H04B7/086H04W16/28
Inventor 范建存韩丽媛罗新民张莹
Owner XI AN JIAOTONG UNIV
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