Beam Report Transmission Collision Handling in NR PUCCH
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Solution Overview
Problem
In the next-generation NR wireless communication system, beam reporting collisions occur due to the limited payload capacity of existing PUCCH channels, leading to inefficient information transmission and potential data loss when beam reports and other uplink control information, such as CSI, compete for transmission resources.
Innovation Solution
Implement a method where, upon collision, a terminal device or network node drops or receives beam reports based on predetermined priority rules, allowing higher-priority information to be transmitted while offloading or multiplexing lower-priority data onto available resources, thereby optimizing transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If beam report and other uplink control information are transmitted simultaneously on limited PUCCH resources, then transmission capacity is maximized, but collision occurs leading to information loss
Solution Approach 1:
The beam report transmission is segmented into multiple parts: first beam report transmitted on initial PUCCH resources, and second beam report transmitted on alternative PUCCH resources after collision detection. This segmentation allows the system to preserve critical beam reporting information by dividing it across different transmission opportunities rather than attempting to fit all information into a single constrained resource allocation.
Solution Approach 2:
The system performs preliminary transmission of the first beam report before collision occurs, then detects the collision and executes preliminary corrective action by transmitting a second beam report on alternative resources. This preliminary action approach ensures that beam reporting information is preserved through proactive retransmission rather than reactive recovery after complete loss.
2Loss of information
If PUCCH payload capacity is increased to accommodate beam reports and CSI simultaneously, then information completeness is improved, but device complexity increases
Solution Approach 1:
The PUCCH resource allocation is made dynamic rather than static. The system initially allocates standard PUCCH resources, detects when collision occurs, and then dynamically switches to alternative PUCCH resources for the second beam report. This dynamic adaptation allows the system to maintain information completeness without permanently increasing payload capacity or device complexity, as the enhanced capacity is activated only when needed.
Solution Approach 2:
The system changes the PUCCH resource parameters (time-frequency resources, format) based on collision detection. Instead of increasing payload capacity permanently, the system modifies resource allocation parameters dynamically - switching from initial PUCCH resources to second PUCCH resources when collision is detected. This parameter change approach preserves information completeness while avoiding permanent increases in device complexity.
3Reliability
If beam report priority is increased to ensure transmission, then beam reporting reliability is improved, but other uplink control information transmission is compromised
Solution Approach 1:
The beam report is segmented into first and second transmissions, where the first beam report attempts to share resources with other uplink control information, and the second beam report is transmitted separately on alternative resources after collision detection. This segmentation allows the system to maintain beam reporting reliability through the second transmission without permanently compromising other information, as the alternative resources are activated only when collision occurs.
Solution Approach 2:
The second PUCCH resources act as an intermediary solution when collision between beam report and other uplink control information occurs. Instead of directly prioritizing beam report over other information (which would cause loss of other information), the system uses the alternative PUCCH resources as a mediator to transmit the beam report separately, thereby preserving both beam reporting reliability and other uplink control information transmission.
Data Source
AI summary
Embodiments of the present disclosure relate to a method, terminal device and apparatus for beam report transmission and a method, network node and apparatus for a beam report receiving. In an embodiment of the present disclosure, the method for beam report transmission may include dropping, in response to a collision between a beam report and another uplink control information, a lower-priority one of the beam report and the other uplink control information based on a predetermined priority rule defining a transmission priority of the beam report and the other uplink control information. With embodiments of the present disclosure, it is possible to provide a simple but efficient solution for addressing the collision.