QCL Beam Selection for Simultaneous PUCCH and PUSCH by Temporal Overlap
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing simultaneous uplink control and data transmissions due to separate beam configurations for physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH), leading to suboptimal spectrum utilization and resource management.
Innovation Solution
A method and apparatus for a user equipment (UE) to select a single beam for transmitting both uplink control and data transmissions based on temporal overlap, considering beam priorities, allowing simultaneous transmission on the same beam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate beam configurations are used for PUCCH and PUSCH transmissions, then beam-specific optimization for control and data channels is achieved, but device complexity increases and spectrum utilization deteriorates
Solution Approach 1:
The patent merges the beam selection for PUCCH and PUSCH transmissions by introducing a beam indication field in DCI format 0_1 that can indicate a spatial filter (beam) to be used for both PUSCH and simultaneous PUCCH transmissions. This combining approach maintains beam-specific optimization while reducing device complexity by using a unified beam indication mechanism rather than separate configurations.
Solution Approach 2:
The beam indication field in DCI format 0_1 is designed to serve multiple functions: it indicates the beam for PUSCH transmission, and simultaneously provides the beam indication for PUCCH transmission when they occur in the same slot. This multi-functionality reduces the need for separate beam configurations while maintaining optimization for both channel types.
2Reliability
If separate beam configurations are used for PUCCH and PUSCH transmissions, then channel-specific beam control is achieved, but spectrum utilization deteriorates
Solution Approach 1:
The patent combines the beam indication for PUCCH and PUSCH into a single beam indication field in DCI format 0_1. When PUCCH and PUSCH transmissions overlap in the same slot, the indicated spatial filter is applied to both channels, enabling spectrum-efficient simultaneous transmission while maintaining channel-specific control through the unified indication mechanism.
3Productivity
If dynamic beam selection based on time overlap is implemented, then spectrum utilization is enhanced, but processing complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring the beam indication field in DCI format 0_1 to carry spatial filter information that can be applied to both PUSCH and PUCCH. The UE is pre-configured with the association between the beam indication field and the spatial filter, so when the DCI is received, the UE can immediately determine the beam to use for simultaneous transmissions without complex real-time processing.
Solution Approach 2:
The UE autonomously determines whether to apply the indicated beam to both PUCCH and PUSCH by checking the time overlap condition itself, without requiring additional network control or complex coordination. The UE uses its own timing information to self-determine the appropriate beam application, reducing processing complexity while achieving dynamic spectrum utilization.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for wireless communications. In one aspect, a user equipment (UE) may receive, from a base station, a configuration message indicating a first beam associated with an uplink control transmission and downlink control information (DCI) indicating a second beam associated with the uplink data transmission. The UE may select the first beam or the second beam based on an overlap in time between the uplink control transmission and the uplink data transmission. The base station may identify the first beam or the second beam based on the overlap between the uplink control transmission and the uplink data transmission. The UE may transmit, and a base station may receive, at least a portion of the uplink control transmission and at least a portion of the uplink data transmission using the selected first beam or second beam.