Cell handover decision method for millimeter wave cellular system

A cell handover and millimeter wave technology, applied in wireless communication, location-based services, electrical components, etc., can solve problems such as difficulty in cell handover, reduce the number of handovers and ping-pong times of handovers, reduce cell handovers, and reduce information. The effect of making the overhead

Inactive Publication Date: 2018-09-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0015] The purpose of the present invention is to solve the difficulty in the process of cell handover of users in the high-low frequency hybrid network and to improve the efficiency of cell handover of mobile users, and proposes a method for judging cell handover in millimeter wave cellular systems

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  • Cell handover decision method for millimeter wave cellular system
  • Cell handover decision method for millimeter wave cellular system
  • Cell handover decision method for millimeter wave cellular system

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Embodiment Construction

[0031] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] A millimeter-wave cellular system cell handover judgment method in a high-low frequency hybrid network. This method uses a variety of filters to filter the measured handover parameters, changes the trigger time of handover in the decision algorithm, and adds handover judgment based on location awareness. , including the following steps:

[0033] S1. Channel information acquisition: In the process of cell switching, the millimeter wave base station first tracks the channel information of the mobile user, studies the signal-to-noise ratio of the user signal received by each base station, and uses the pilot signal from the user received by the millimeter wave base station , to calculate the SINR, so as to obtain the best SINR transmit beam and receive beam, and use this SINR value to represent the measured channel....

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Abstract

The invention belongs to the technical field of wireless communications, and specifically relates to a cell handover decision method for a millimeter wave cellular system. The cell handover decision method optimizes a cell handover decision, including filtering by using multiple filters, increasing the stability of measured handover parameters, and reducing the frequent handover caused by the rapid change of measurement signals, thereby changing the user experience of a mobile user in high and low frequency hybrid networking. In the optimization of a decision algorithm, the trigger time of handover is changed, so that the mobile user can perform handover in time when cell handover is needed, and transmit with a millimeter-wave base station with better channel information, thereby improvingthe transmission speed and enhancing user experience. In addition, the handover decision based on location awareness is added, so that the probability of switching the user to a correct cell is increased, thus the frequent cell handover is reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to millimeter wave communication (Millimeter-Wave (mmWave) Communication), beam selection technology, and multiple input multiple output (Multiple Input Multiple Output, MIMO) technology, specifically a millimeter wave cellular System cell handover judgment method. Background technique [0002] As a key technology of 5G communication, millimeter wave frequency band communication has received extensive attention. Compared with traditional low-band communications, mmWave bands have disadvantages in coverage and robustness due to their shorter wavelengths. Therefore, the hybrid networking method combining millimeter wave technology with traditional LTE technology has become a hot topic in next-generation communications. In a hybrid networking system, cell handover is an important part of mobile user mobility management and has a crucial impact on user experience. Therefo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W36/00
CPCH04W4/023H04W36/0094
Inventor 李琦张忠培胡城中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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