UE Uplink Resource Selection for Multi-TRP Beam Conflict
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Solution Overview
Problem
In wireless communication systems with multiple TRPs serving a UE, uplink transmission conflicts between uplink data and control information can lead to reception quality degradation or extra delays due to improper beamforming, especially when beams are out of synchronization.
Innovation Solution
A method for determining a target time-frequency resource based on antenna port groups and time-frequency resources to ensure correct beamforming for uplink data and control information transmission, avoiding conflicts and ensuring reliable reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink data and uplink control information for different TRPs are transmitted on the same physical layer data channel, then transmission efficiency is improved, but reception quality degrades due to beam misalignment
Solution Approach 1:
The patent applies local quality by associating different antenna port groups with different TRPs and their respective beamforming characteristics. Each antenna port group is configured with specific QCL (quasi-co-location) relationships that are local to its intended TRP, allowing the system to maintain distinct beam qualities for different TRPs while transmitting on the same channel
Solution Approach 2:
The patent implements universality by enabling a single physical layer data channel to serve multiple TRPs simultaneously. The same PUSCH (Physical Uplink Shared Channel) can carry uplink data and control information for multiple TRPs, with each TRP receiving the signal through its designated antenna port group and beamforming configuration
2Adaptability or versatility
If uplink control information is transmitted from one TRP to another TRP, then communication flexibility is improved, but transmission delay increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple antenna port groups with their respective QCL relationships to different TRPs before transmission is needed. The UE and network have already established the beamforming configurations and associations, so when uplink control information needs to be transmitted to a different TRP, the pre-configured antenna port groups can be immediately activated without additional beam alignment delays
3Manufacturing precision
If multiple antenna port groups are configured with different QCL relationships, then beamforming accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies segmentation by dividing the antenna ports into multiple distinct antenna port groups, where each group is associated with a specific TRP and has its own QCL relationship configuration. This segmentation allows the system to manage complex beamforming requirements by breaking them into smaller, independently configurable units, making the overall configuration more tractable and manageable
Data Source
AI summary
The present disclosure provides method and device in a User Equipment (UE) and a base station used for wireless communication. The UE receives a first signaling and a second signaling; and transmits first reporting information in a target time-frequency resource. The first signaling and the second signaling are respectively used to determine a first antenna port group and a second antenna port group; a first antenna port group and a second antenna port group are respectively applicable to a first time-frequency resource and a second time-frequency resource; at least one of the following is used to determine the target time-frequency resource from the first time-frequency resource and the second time-frequency resource; the first antenna port group, the second antenna port group. When uplink data and control information for different TRPs conflict in time domain, the above method guarantees the reception quality of the two and avoids an extra delay.