PUCCH Uplink Beam Determination via Indication Signaling
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Solution Overview
Problem
There is no definitive method or apparatus in existing technologies to support Physical Uplink Control Channel (PUCCH) transmission in new wireless communication systems, particularly in 5G NR, where multiple Transmission and Reception Points (TRPs) use different beams for downlink and uplink communications.
Innovation Solution
A PUCCH transmission method that determines the uplink beam for transmission based on acquired indication signaling, using Beam Pair Linkage (BPL), Quasi-Co-Location (QCL) relationships, or high-layer signaling to ensure correct beam alignment and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TRPs transmit PDCCH and PDSCH using different beams, then coverage and capacity are improved, but the method for PUCCH transmission becomes undefined and complex
Solution Approach 1:
The patent introduces indication signaling as an intermediary mechanism that carries beam identification information from the network side to the terminal. This signaling acts as a mediator that resolves the complexity by providing a standardized method for the terminal to determine which uplink beam to use for PUCCH transmission based on the indicated beam information, thus simplifying the overall system complexity while maintaining multi-TRP beam transmission capability
Solution Approach 2:
The patent changes the parameter of beam selection from an undefined state to a determined state by introducing beam indication signaling. The signaling carries specific beam identification parameters that allow the terminal to select the appropriate uplink beam based on the indicated downlink beam, transforming the complex multi-beam scenario into a manageable parameter-driven selection process
2Reliability
If beam alignment is strictly enforced for PUCCH transmission, then transmission reliability is improved, but adaptability to different transmission scenarios is reduced
Solution Approach 1:
The patent implements dynamic beam selection by allowing the beam indication signaling to flexibly point to different uplink beams based on the actual downlink transmission scenario. The terminal dynamically determines the appropriate PUCCH beam according to the indicated signaling, enabling the system to adapt to different transmission scenarios while maintaining reliable beam-aligned transmission when needed
Solution Approach 2:
The indication signaling mechanism serves multiple functions: it provides beam alignment for reliability when downlink and uplink use the same beam, and it enables flexible scenario adaptation when different beams are used. This universal mechanism handles both strict beam alignment cases and flexible multi-beam scenarios through a single standardized approach
Data Source
AI summary
Disclosed are a physical uplink control channel (PUCCH) transmission method, a user equipment and an apparatus, used to solve the technical problem in existing technology wherein there is no specific method or apparatus to support a PUCCH transmission scenario in a new wireless communication system. The PUCCH transmission method comprises: on the basis of an acquired indication signaling, determining an uplink beam used when carrying out PUCCH transmission; and carrying out PUCCH transmission using the determined uplink beam.