Group-Based Beam Reporting Using RSRP Differences
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Solution Overview
Problem
Existing group-based beam reporting (GBBR) frameworks in multi-receiver operations do not adequately account for cross-interference between simultaneous downlink transmissions, leading to inefficient and potentially inaccurate beam selection and reporting.
Innovation Solution
The proposed solution involves determining differences in reference signal received power (RSRP) measurements for multiple beams, applying thresholds to assess cross-interference, and selectively reporting or excluding candidate reference signal groups based on these differences to enhance beam reporting accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If group-based beam reporting is performed without considering RSRP differences between reference signals, then beam reporting can be performed with simpler processing, but cross-interference between simultaneous downlink transmissions increases and beam selection accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by calculating RSRP differences between reference signals in advance, before beam reporting occurs. The UE determines the difference between RSRP of first reference signal and RSRP of second reference signal, and compares it against a threshold to proactively identify potential cross-interference scenarios. This preliminary assessment enables the system to prevent inaccurate beam selection before it happens, rather than correcting errors after beam reporting.
Solution Approach 2:
The patent implements feedback by using RSRP difference measurements to inform beam reporting decisions. The UE continuously monitors RSRP levels and calculates differences between reference signals from different TRPs, using this feedback information to determine whether to include or exclude candidate reference signal groups from beam reports. This feedback mechanism ensures that beam reporting reflects current channel conditions and interference levels, improving selection accuracy.
2Loss of information
If all candidate reference signal groups are reported without filtering based on RSRP differences, then reporting completeness is improved, but resource efficiency decreases due to unnecessary transmissions and processing
Solution Approach 1:
The patent applies the taking out principle by extracting and removing candidate reference signal groups that exhibit high RSRP differences from the beam reporting set. When the RSRP difference between reference signals exceeds a configured threshold, the UE excludes the corresponding candidate reference signal group from the beam report. This extraction process eliminates unnecessary reporting of groups that would experience significant cross-interference, reducing uplink resource consumption and base station processing load while maintaining reporting completeness for viable beam groups.
Solution Approach 2:
The patent implements partial action by selectively reporting only those candidate reference signal groups that meet the RSRP difference threshold criteria. Rather than reporting all possible candidate groups (excessive action) or using a fixed number of groups (partial action), the system dynamically determines which groups to report based on measured RSRP differences. This partial reporting approach optimizes resource efficiency by transmitting only the necessary beam information while maintaining sufficient completeness for reliable communication.
3Object-affected harmful factors
If RSRP difference threshold filtering is applied to exclude candidate reference signal groups, then cross-interference is reduced and beam quality improves, but the number of reportable beams decreases
Solution Approach 1:
The patent applies parameter changes by using RSRP difference values as a filtering parameter to determine candidate reference signal group inclusion. The system changes the reporting state of reference signal groups based on the RSRP difference parameter: groups with RSRP differences below the threshold are included in beam reports, while groups exceeding the threshold are excluded. This parameter-based filtering reduces cross-interference by eliminating problematic beam combinations while dynamically adjusting the number of reportable beams based on actual channel conditions rather than applying a fixed reduction.
Data Source
AI summary
An apparatus and method for group-based beam reporting (GBBR) for multi-receiver operation based on reference signal received power (RSRP) differences is provided. The method may include determining, by a first apparatus, a candidate reference signal (RS) group to be provided to at least one second apparatus. The candidate RS group includes at least a first RS and a second RS. The method also includes determining a first difference between a first RSRP of the first RS and a second RSRP of the second RS. The method further includes determining a second difference between a third RSRP of the second RS and a fourth RSRP of the first RS, and performing at least one of excluding the candidate RS group from a group-based beam report based on the first and second differences, or transmitting, to the at least one second apparatus, information indicative of the first and second differences.