Base station antenna selection and multi-antenna channel adaptive method, device and base station

A multi-antenna, self-adaptive technology, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve the problems of high antenna cost, low ratio, unfavorable multi-stream data transmission, etc., and achieve the effect of improving performance and reducing correlation

Active Publication Date: 2018-12-28
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the 8-channel antenna application scenario, multi-stream (3-stream / 4-stream) beamforming has strict requirements on the channel environment, and the ratio is low, so it is difficult to apply
The main reason is that the antenna element spacing of the 8-channel antenna is small, resulting in high antenna correlation, which is not conducive to multi-stream data transmission
Replacing antennas with large spacing can improve multi-stream data transmission performance, but on the one hand, the cost of replacing antennas is too high; on the other hand, antennas must have good coverage capabilities, and antennas with large spacing cannot meet network coverage requirements

Method used

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  • Base station antenna selection and multi-antenna channel adaptive method, device and base station
  • Base station antenna selection and multi-antenna channel adaptive method, device and base station
  • Base station antenna selection and multi-antenna channel adaptive method, device and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0052] Embodiment 1: The base station configures the terminal to perform measurement according to the 4-port CSI-RS.

[0053] Such as Figure 5 As shown, it is a schematic diagram of the implementation flow of the corresponding multi-antenna channel adaptation method, which may include the following steps:

[0054] S51. The base station configures cell-level 4-port CSI-RS measurement.

[0055] Specifically, the base station configures the cell-level 4-port CSI-RS measurement, and instructs the terminals within the coverage to perform the 4-port CSI-RS measurement. At the same time, the base station uses the SRS to perform single- and dual-stream beamforming.

[0056] S52. The terminal performs 4-port CSI-RS measurement according to the configuration of the base station.

[0057] During specific implementation, the terminal measures according to the 4-port CSI-RS according to the protocol.

[0058] S53. The terminal feeds back channel information to the base station.

[00...

Embodiment approach 2

[0067] Embodiment 2: The base station configures the terminal to perform measurement according to the 8-port CSI-RS

[0068] Such as Figure 6 As shown, it is a schematic diagram of the implementation flow of the corresponding multi-antenna channel adaptation method, which may include the following steps:

[0069] S61. The base station configures cell-level 8-port CSI-RS measurement.

[0070] During specific implementation, the base station configures a cell-level 8-port CSI-RS, and instructs the terminal to measure the CSI-RS. At the same time, the base station can use the SRS to perform single-dual stream beamforming, and can also perform beamforming based on CSI-RS and codebook feedback.

[0071] S62. The terminal performs 8-port CSI-RS measurement according to the configuration of the base station.

[0072] Specifically, the terminal measures according to the 8-port CSI-RS according to the protocol.

[0073] S63. The terminal feeds back the first channel information to...

Embodiment approach 3

[0087] Embodiment 3: The base station configures the terminal to perform measurement according to alternate 8-port CSI-RS and 4-port CSI-RS.

[0088] Such as Figure 8 As shown, it is a schematic diagram of the implementation flow of the corresponding multi-antenna channel adaptation method, which may include the following steps:

[0089] S81. The base station configures cell-level 8-port CSI-RS and 4-port CSI-RS measurements with alternating cycles.

[0090] During specific implementation, the base station configures cell-level 8-port and 4-port CSI-RSs with alternating cycles. For example, the cycles of the two CSI-RSs are each 20 ms, and they appear alternately every 10 ms, such as Figure 4 As shown; Instruct the terminal to measure 8-port CSI-RS; Sounding signal (SRS) can be used for single- and dual-stream beamforming, or a method based on CSI-RS and codebook feedback can be used for beamforming.

[0091] S82. The terminal performs CSI-RS measurement according to the c...

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Abstract

The present invention discloses a base station antenna selection method, a base station antenna selection apparatus, a multi-antenna channel self-adaptation method, a multi-antenna channel self-adaptation apparatus, and a base station. According to the invention, the antenna covering capability is ensured and the multi-stream data transmission performance is improved at the same time. The base station antenna selection method includes: N antenna channels satisfying a preset interval condition are selected from base station antennas for performing multi-stream beam forming for a terminal when the multi-stream data transmission is required by the terminal. The multi-antenna channel self-adaptation method includes the steps as follows: transmitting CSI-RS measurement instruction information to the terminal; confirming that the terminal supports the multi-stream data transmission, and selecting N antennal channels satisfying the preset interval condition for performing multi-stream beam forming for the terminal when the terminal performs measurement according to a CSI-RS with four ports; reconfiguring the terminal for performing measurement according to the CSI-RS with four ports if the terminal performs measurement according to a CSI-RS with eight ports, and selecting N antenna channels satisfying the preset interval condition for performing multi-stream beam forming for the terminal according to second channel information fed back by the terminal.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a base station antenna selection and multi-antenna channel adaptive method, device and base station. Background technique [0002] In the existing TD-LTE (Time Division Long Term Evolution, Time Division Long Term Evolution) network, 8-channel antennas are used to receive and transmit data on the network side. The 8-channel antenna design features cross-polarization, such as figure 1 As shown, the distance between polarized antenna pairs is small (0.5 times the wavelength in the F frequency band, and 0.7 times the wavelength in the D frequency band), which is suitable for beamforming and can effectively improve the cell coverage and cell throughput. Theoretical analysis and live network application show that the 8-channel antenna can obtain better single-stream and dual-stream forming performance. [0003] On the basis of LTE Release9 dual-stream beamform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
Inventor 许宁张龙
Owner CHINA MOBILE COMM GRP CO LTD
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