PUCCH PUSCH Collision Handling via UCI Multiplexing and Beam Separation
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Solution Overview
Problem
Next-generation wireless communication systems, such as 5G NR, face challenges in managing radio resource collisions between Physical Uplink Control Channels (PUCCH) and Physical Uplink Shared Channels (PUSCH), leading to inefficiencies in resource utilization and increased latency.
Innovation Solution
A method and apparatus for User Equipment (UE) to handle radio resource collisions by receiving beam indications for multiple PUSCHs, multiplexing Uplink Control Information (UCI) on overlapping PUSCHs in the time domain, and transmitting each PUSCH using a designated beam, while optionally forgoing PUCCH transmission when overlap occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUCCH and PUSCH are transmitted simultaneously in overlapping time resources, then radio resource utilization is improved, but signal interference and transmission reliability deteriorate
Solution Approach 1:
The patent segments the uplink transmission by separating PUCCH and PUSCH into different beam resources. When time-domain overlap is detected, the system divides the transmission paths by assigning different spatial beams, allowing simultaneous transmission without direct interference. This segmentation resolves the contradiction by maintaining high resource utilization while preserving transmission reliability through spatial separation.
Solution Approach 2:
The patent transitions from one-dimensional time-domain resource allocation to multi-dimensional resource allocation by introducing spatial beam dimension. When time overlap occurs, the system resolves conflicts by allocating different spatial beams (azimuth/elevation dimensions), effectively adding another dimension to resource management. This allows simultaneous PUCCH and PUSCH transmission without interference, improving both productivity and reliability.
2Reliability
If PUCCH transmission is dropped to avoid collision with PUSCH, then transmission reliability is improved, but signaling overhead and information loss increase
Solution Approach 1:
The patent merges PUCCH and PUSCH transmissions by multiplexing control information (UCI) from PUCCH onto the PUSCH when time-domain overlap is detected. This combining approach eliminates the need to drop PUCCH transmission, thereby preventing information loss while avoiding collision interference through the merging of transmission resources. The solution improves reliability without incurring signaling overhead penalties.
Solution Approach 2:
The patent makes PUSCH a universal resource that can carry both data and control information simultaneously. By enabling PUSCH to fulfill both data transmission and control signaling functions (when UCI is multiplexed onto it), the system eliminates the need for separate PUCCH transmission in overlapping scenarios. This multi-functionality approach prevents information loss while avoiding collision, improving reliability without additional overhead.
3Productivity
If multiple beams are used for simultaneous PUSCH transmission, then data transmission efficiency is improved, but beam management complexity increases
Solution Approach 1:
The patent implements dynamic beam selection and configuration for multi-beam PUSCH transmission. The system dynamically adjusts beam parameters (spatial relations, TCI states) based on real-time channel conditions and collision detection results. This dynamic approach optimizes data transmission efficiency across multiple beams while managing complexity through adaptive rather than static beam configuration.
Solution Approach 2:
The patent incorporates feedback mechanisms where the UE reports beam-related information (spatial relation info, TCI state preferences) to the network, and the network adjusts beam configurations accordingly. This feedback loop enables efficient multi-beam transmission by continuously optimizing beam parameters based on actual transmission performance, thereby improving data efficiency while keeping beam management complexity manageable through closed-loop control.
Data Source
AI summary
A wireless communication method and apparatus for handling radio resource collision are provided. The wireless communication method includes receiving a Radio Resource Control (RRC) configuration indicating a first Control Resource Set (CORESET) pool index associated with a Physical Uplink Control Channel (PUCCH) designated to carry Uplink Control Information (UCI); determining whether the PUCCH overlaps one or more Physical Uplink Shared Channels (PUSCHs) in time domain; after determining that the PUCCH overlaps at least one of the one or more PUSCHs in the time domain, multiplexing the UCI on a particular PUSCH of the one or more PUSCHs that is associated with the first CORESET pool index; and transmitting the UCI via the particular PUSCH.