Uplink Beam Failure Feedback Bitmap Encoding
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Solution Overview
Problem
In wireless communication systems, existing methods fail to efficiently manage beam failures across multiple cells, leading to unnecessary resource allocation and increased signaling overhead when transmitting uplink feedback information.
Innovation Solution
A method for a terminal to detect beam failures in multiple cells and transmit beam-related uplink feedback information to a base station, including identification, number, and quality information of affected cells, using encoded bitmap and RSRP data, allowing for prioritization and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the terminal transmits beam-related uplink feedback information for all configured cells, then the base station receives complete feedback information, but the signaling overhead and resource allocation increase unnecessarily
Solution Approach 1:
The patent extracts only the essential feedback information (beam failure detection results for affected cells) rather than transmitting complete feedback for all configured cells. The terminal identifies and transmits only the necessary beam-related feedback information for cells where beam failure occurs, thereby reducing signaling overhead while maintaining information completeness for affected cells.
Solution Approach 2:
The patent segments the feedback information transmission by separating identification information (bitmap indicating affected cells) from detailed beam information. This segmentation allows the base station to first understand which cells are affected and then request only the necessary detailed feedback, optimizing the balance between information completeness and signaling overhead reduction.
2Loss of information
If the terminal transmits detailed beam information for all cells, then the base station has complete beam data, but the resource allocation becomes inefficient
Solution Approach 1:
The patent implements dynamic feedback transmission where the terminal adjusts the amount of feedback information based on actual beam failure conditions. Instead of transmitting fixed detailed beam information for all cells, the terminal dynamically transmits only detailed beam information for affected cells after first indicating which cells are affected through bitmap information, thereby improving resource allocation efficiency.
Solution Approach 2:
The patent introduces a feedback mechanism where the terminal first transmits identification information indicating which cells are affected by beam failure, then the base station can request detailed beam information only for those affected cells. This feedback-based approach ensures information completeness for affected cells while avoiding unnecessary resource consumption for cells without beam failure.
3Loss of information
If the base station requests beam feedback information for all cells, then the terminal provides complete feedback, but the communication efficiency decreases
Solution Approach 1:
The patent applies preliminary action by having the terminal first transmit bitmap identification information indicating which cells are affected by beam failure before transmitting detailed beam information. This preliminary indication allows the base station to prepare appropriate response messages and request only the necessary detailed feedback for affected cells, thereby improving communication efficiency while maintaining information completeness.
Data Source
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AI summary
The present disclosure discloses a method for transmitting, by means of a user equipment, uplink feedback information related to at least one cell among a plurality of cells configured to the user equipment in a wireless communication system comprising the user equipment and a base station comprising a plurality of cells, and a user equipment and a base station for supporting same. According to an embodiment applicable to the present disclosure, a user equipment may report, to a base station, only uplink feedback information related to some of a plurality of cells in which BF has occurred, and correspondingly, the base station may recognize that uplink feedback information related to a beam which is received from the user equipment includes only uplink feedback information related to some of the plurality of cells in which the BF has occurred.