Joint Channel Correction for Indoor RRU Clusters
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Solution Overview
Problem
Existing channel correction methods for indoor communication scenarios require multiple steps and cannot implement channel correction between RRUs without a self-correction function, leading to interference and reduced spectrum utilization due to limited processing performance and hardware constraints.
Innovation Solution
A joint channel correction method that divides RRUs into clusters and uses a joint channel correction apparatus to send correction reference signals through multiple traffic channels, allowing for the calculation of correction compensation coefficients even in RRUs without a self-correction function, thereby enabling channel correction between RRUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel self-correction is implemented in each RRU using a dedicated correction reference channel, then channel correction accuracy is improved, but device complexity and hardware requirements increase
Solution Approach 1:
The patent merges the channel correction function from individual RRU units to a centralized joint channel correction apparatus. Multiple RRUs share common correction reference channels and a central processing unit that calculates correction coefficients for all RRUs, eliminating the need for each RRU to have independent correction hardware while maintaining correction accuracy
Solution Approach 2:
The joint channel correction apparatus serves multiple RRUs simultaneously using universal correction reference channels. The same correction infrastructure is shared across all RRUs in the cluster, making the system more efficient and reducing per-RRU hardware requirements
2Productivity
If multiple base stations are used jointly for transmission to increase transmit antennas and spatial freedom, then spectrum utilization is improved, but channel correction complexity increases
Solution Approach 1:
The patent combines channel correction operations across multiple base stations into a unified joint correction process. The joint channel correction apparatus coordinates correction reference signals and calculates coefficients for multiple base stations simultaneously, reducing overall system complexity while enabling multi-station collaboration for improved spectrum utilization
Solution Approach 2:
The system segments RRUs into clusters that can be independently corrected by the joint apparatus. This modular approach allows the correction system to handle multiple base stations in manageable groups, reducing the complexity burden while maintaining the benefits of multi-station operation
3Reliability
If RRUs are divided into clusters with adjacent RRUs for joint correction, then correction effectiveness is improved, but system organization complexity increases
Solution Approach 1:
The patent divides the RRU system into spatial clusters of adjacent RRUs for joint correction. Each cluster is handled independently by the joint channel correction apparatus, improving correction effectiveness by considering local channel characteristics while keeping the organization manageable through clear spatial boundaries
Data Source
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Figure 3
AI summary
A joint channel correction method, an apparatus, and a system are disclosed. The joint channel correction method includes: sending a first joint channel correction instruction to a first RRU; sending a second joint channel correction instruction to a second RRU; receiving a result sent by the second RRU about reception of the first correction reference signal through X2 receive channels in X2 traffic channels; receiving a result sent by the first RRU about reception of the second correction reference signal through X1 receive channels in X1 traffic channels; and obtaining correction compensation coefficients of the X1 traffic channels and/or the X2 traffic channels through calculation according to the first correction reference signal, the result about reception of the first correction reference signal through the X2 receive channels, the second correction reference signal, and the result about reception of the second correction reference signal through the X1 receive channels. Technical solutions provided by embodiments of the present invention help implement channel correction between RRUs without a channel self-correction function.