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Feedback and configuration method and device of pilot frequency parameter, user terminal, and base station

A technology of pilot frequency parameters and parameters, which is applied in the directions of pilot signal distribution, digital transmission system, and multiple use of transmission paths, etc. It can solve problems such as different configurations, greater terminal differences, and insufficient flexibility of pilot frequency configuration, and achieve The effect of good pilot resource utilization and performance

Active Publication Date: 2018-05-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the prior art, the above-mentioned pilot configurations are all determined by the base station and then notified to the terminal, because the design of these pilots has taken into account some measurement and demodulation requirements of the terminal with the mainstream configuration in typical scenarios, and the base station makes a simple judgment Then you can decide which configuration to use; this method may be sufficient in 4G, but there will be differences in the following aspects in 5G: the differences in terminals will become larger, for example, the number of receiving antennas in terminals will increase, and the configuration will be very large. 5G application scenarios are more complex, and wider communication frequencies, mobile speeds, and more service types need to be considered; more differentiated terminal requirements; the same pilot may need to implement more functions
Therefore, there will be several problems in 5G: on the one hand, the configuration of the pilot frequency completely determined by the base station cannot be very accurate; on the other hand, the existing pilot frequency configuration is not flexible enough to obtain Very good pilot efficiency, obtaining a good compromise between pilot resource utilization and performance

Method used

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  • Feedback and configuration method and device of pilot frequency parameter, user terminal, and base station
  • Feedback and configuration method and device of pilot frequency parameter, user terminal, and base station
  • Feedback and configuration method and device of pilot frequency parameter, user terminal, and base station

Examples

Experimental program
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Effect test

Embodiment 1

[0113] The terminal determines the transmission parameters of the demodulation pilot, and the transmission parameters of the demodulation pilot may include the sequence parameter indication information of the demodulation pilot; here, the pilot sequence parameter may include the type of sequence, for example, the DMRS may select a ZC sequence or a PN sequence , where the ZC sequence can be well used for time-frequency offset estimation, when other signals cannot be used for time-frequency offset estimation, or cannot meet some requirements of time-offset estimation or frequency offset estimation, or when there is no other available reference signal For frequency offset estimation, the base station can configure the ZC sequence for the terminal; if the time-frequency offset estimation information can be obtained by referring to other signals, a simpler PN sequence can be used, and the number of frequency domain symbols that the PN sequence needs to occupy can be less, which is mo...

Embodiment 2

[0116] The terminal determines the transmission parameters of the demodulation pilot, and the transmission parameter of the demodulation pilot may include the indication information of the repeated transmission times of the same precoded demodulation pilot; the terminal may determine this parameter according to the setting of the receiving beam, because the terminal expects the same The precoded demodulation pilot is repeatedly sent in the time domain for the blind detection of the receiving beam, so this parameter is related to the setting of the receiving beam; as image 3 As shown, the demodulation pilot corresponding to the same precoding 1 repeatedly sends M1 time-domain symbols, and the demodulation pilot corresponding to precoding 2 repeats M2 symbols, where M1 and M2 can be fed back by the terminal to the progress, and the fed back The parameter represents the configuration value suggested by the terminal to the base station;

[0117] Here only two different precoded d...

Embodiment 3

[0120] The terminal determines the transmission parameters of the demodulation pilot, and the transmission parameter of the demodulation pilot may include the precoding binding granularity indication information of the demodulation pilot; specifically, the demodulation pilot may be divided into multiple subcarriers in the time domain group or RB (resource block) group, and define these subcarriers or RB groups, and notify the base station;

[0121] Correspondingly, the base station can use the terminal to determine the transmission parameters of the demodulation pilot by default, such as the precoding binding granularity indication information of the demodulation pilot mentioned here, so that there is no need to use downlink signaling to configure this parameter; Of course, the base station may also have the final decision right, and it may need to consider some other factors, and finally decides to configure the precoding binding granularity indication information of the demod...

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PUM

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Abstract

The embodiment of the invention discloses a feedback and configuration method and device of a pilot frequency parameter, a user terminal and a base station. The feedback method of the pilot frequencyparameter comprises the following steps: the terminal determines a sending and / or receiving parameter of the pilot frequency; and the terminal feeds back the sending and / or receiving parameter of thepilot frequency to the base station; the configuration method of the pilot frequency parameter comprises the following steps: a network side determines the sending and / or receiving parameter of the pilot frequency; and the network side configures the sending and / or receiving parameter of the pilot frequency for the terminal through a downlink signaling.

Description

technical field [0001] The present invention relates to a pilot parameter feedback method and device, a pilot parameter configuration method and device, a user terminal, and a base station. Background technique [0002] In a wireless communication system, the transmitter often uses multiple antennas to obtain a higher transmission rate. Multiple antennas can improve the signal-to-noise ratio and support more spatial multiplexing layers. Compared with the open-loop multiple-input multiple-output (MIMO, Multi -inputMulti-output) technology, MIMO technology using CSI information (closed-loop MIMO precoding (Precoding) will have higher capacity, is a transmission technology widely used in mainstream 4G standards. The core idea of ​​closed-loop MIMO precoding technology is The receiving end feeds back the channel information to the sending end, and the sending end uses some transmit precoding techniques according to the obtained channel information to obtain beamforming gain and...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04B7/0417H04B7/06
CPCH04B7/0417H04B7/0619H04L5/0048H04L5/0051H04B17/24
Inventor 陈艺戬鲁照华李儒岳蒋创新高波
Owner ZTE CORP