United channel correction method for multiple remote radio units (RRU) and related device

Abstract

The embodiment of the invention discloses a united channel correction method for multiple remote radio units (RRU) and a related device. The united channel correction method comprises steps of that a BBU sends a first channel correction instruction to a first RRU, and the first channel correction instruction triggers the first RRU to send a first correction reference signal to an X2 receiving channel in X2 service channels in a second RRU through an X1 emission channel in X1 service channels of the first RRU; the BBU sends a second channel correction instruction to the second RRU; and the BBU carries out calculation to obtain a correction compensation factor of the X1 service channels and / or the X2 service channels according to the first correction reference signal, a receiving result for the first correction reference signal of the X2 receiving channel, a second correction reference signal and a receiving result for the second correction reference signal of the X1 receiving channel. According to the technical scheme provided by the embodiment of the invention, realization of channel correction among RRUs without correction reference channels is facilitated.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and a related device for joint channel calibration of multiple remote radio frequency units. Background technique [0002] In indoor communication scenarios, the distance between indoor small base stations is generally very small (within 30m). If each small base station is configured as an independent cell in an area, the inter-cell interference will be serious. Although the SFN mode can eliminate the interference between independent cells, the spectrum utilization rate is low. [0003] Multi-User Beamforming (MU-BF, Multi-User Beam forming) is a means to improve spectrum utilization, which is difficult to apply due to constraints of existing products. This is because limited by the size, a single existing small base station generally only has two transmitting antennas, and the degree of freedom of space is limited, so it is difficult to find a suitable m...

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Problems solved by technology

[0005] The inventors of the present invention have found through research and practice that although there are currently some multi-RRU channel calibration methods, in the existing multi-RRU channel calibration methods, two steps are usually required to complete. A dedicated calibration reference channel in each RRU completes channel calibration within each RRU, and then performs channel calibration between RRUs. This existing channel calibration mechanism makes it possible for RRUs that do not have a calibration reference channel and do not have a channel self-calibration function. The channel calibration between multiple RRUs cannot be completed

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