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Communication method and device for tdd system

A communication method and a technology of a communication device, which are applied in the field of communication, can solve problems such as uplink signal interference, and achieve the effect of reducing interference and realizing space isolation

Active Publication Date: 2019-06-14
CHINA MOBILE GROUP JIANGSU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in TDD technology, since receiving and sending use the same frequency, due to the influence of transmission delay, the downlink signal generated by the remote base station is likely to cause interference to the uplink signal received by the near-end base station.

Method used

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  • Communication method and device for tdd system
  • Communication method and device for tdd system
  • Communication method and device for tdd system

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Experimental program
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Effect test

Embodiment 1

[0028] In order to solve the above technical problems, Embodiment 1 of the present application provides a communication method for a TDD system, which is used to reduce the interference caused by the downlink signal generated by the remote base station to the uplink signal received by the near-end base station. The specific flow chart of the method is shown in image 3 shown, including the following steps:

[0029] Step S31: Monitor the uplink interference parameter value of the base station.

[0030] The uplink interference parameter value here may specifically be the PRB interference intensity of the physical resource block.

[0031] Step S32: When the uplink interference parameter value of the base station is greater than the first preset threshold, divide the antenna of the base station into a receiving channel and a transmitting channel according to the polarization direction.

[0032] Generally speaking, the multi-channel antennas of the base station are either used fo...

Embodiment 2

[0043] Based on the same inventive concept, Embodiment 2 of the present application proposes a communication method for a TDD system, which is used to reduce the interference caused by the downlink signal generated by the remote base station to the uplink signal received by the near-end base station.

[0044] The main idea of ​​Embodiment 2 of the present application is as follows: Utilizing the spatially orthogonal characteristics of the two polarization directions of the antenna, the original 8-transmission and 8-reception base station antenna is converted into 4 channels in one polarization direction for transmission, and 4 channels in the other polarization direction The 4 channels are used for receiving, breaking through the traditional way to realize the time isolation of the original uplink and downlink propagation paths into the space / time isolation of the uplink and downlink propagation paths in two polarization directions, avoiding the delay of the downlink propagation...

Embodiment 3

[0061] Based on the same inventive concept, Embodiment 3 of the present application provides a communication device for a TDD system, which can be applied on the base station side to reduce the interference caused by the downlink signal generated by the remote base station to the uplink signal received by the near-end base station.

[0062] Such as Figure 6 As shown, the device may include: a monitoring module 61, configured to monitor the uplink interference parameter value of the base station; a channel division module 62, configured to divide the antenna of the base station according to the polarity when the uplink interference parameter value of the base station is greater than a first preset threshold The direction is divided into a receiving channel and a transmitting channel; the receiving weight adjustment module 63 is used to adjust the uplink receiving weight of the receiving channel according to the change of the monitored uplink interference parameter value of the ...

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Abstract

The invention discloses a communication method and device for a TDD (Time Division Duplex) system. The interference of a downlink signal generated by a rear end base station to an uplink signal received by a near end base station can be reduced. The method comprises the steps of monitoring an uplink interference parameter value of a base station; when the uplink interference parameter value of the base station is greater than a first preset threshold, dividing antennas of the base station into a receiving channel and a transmitting channel according to polarization directions; adjusting an uplink receiving weight of the receiving channel in real time according to the monitored change of the uplink interference parameter value of the base station, until the uplink interference parameter value of the base station is reduced to be smaller than a preset allowable value; and adjusting a downlink transmitting weight of the transmitting channel in real time according to the uplink receiving weight of the receiving channel.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a communication method and device for a TDD system. Background technique [0002] In the digital mobile communication system, there are two duplex communication methods, namely: TDD (Time Division Duplex) and FDD (Frequency Division Duplex). [0003] In the TDD mode, the base station and user equipment use the same frequency to receive and transmit signals. For the base station or user equipment, receiving signals and transmitting signals are separated and alternately performed in time. For a period of time, only signals are received but not transmitted. The time only sends signals but not receives signals, and the asymmetric transmission of uplink and downlink can be realized by adjusting the length of receiving and sending time. [0004] However, in the TDD technology, since receiving and sending use the same frequency, due to the influence of transmission ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00H04W24/04
CPCH04J11/0056H04W24/04
Inventor 魏志刚卞国东仇勇张强张晶
Owner CHINA MOBILE GROUP JIANGSU