Beam-Aware UCI Multiplexing for Overlapping PUSCH and PUCCH
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Solution Overview
Problem
Conventional communication methods in 5G networks fail to ensure high transmission reliability and low latency for shared and control channels, leading to deteriorated performance and user experience, particularly in scenarios where PUSCH and PUCCH overlap, and existing solutions like piggybacking UCI on PUSCH or time-domain repeated transmission do not adequately address reliability issues.
Innovation Solution
The terminal device determines transmission occasions for control information based on beamforming techniques of both shared and control channels, optimizing transmission reliability and considering data reliability on shared channels, even in overlapping scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transmission solutions are used for shared and control channels, then device complexity is reduced, but transmission reliability and latency performance deteriorate
Solution Approach 1:
The patent combines control channel (PUCCH) and shared channel (PUSCH) transmissions by multiplexing control information (UCI) onto the shared channel resources. When PUCCH and PUSCH resources overlap in time-frequency domain, the control information is merged with data transmission on PUSCH, eliminating the need for separate control channel transmission and improving reliability while managing complexity.
Solution Approach 2:
The patent introduces dynamic resource allocation and selection mechanisms where the terminal device dynamically determines whether to transmit control information on PUCCH or multiplex it on PUSCH based on resource overlap conditions. This dynamic adaptation allows the system to optimize transmission reliability for different scenarios without requiring complex fixed structures.
2Reliability
If control information is multiplexed on shared channel, then transmission reliability improves, but resource utilization efficiency worsens
Solution Approach 1:
The patent applies partial multiplexing where control information is only multiplexed on shared channel when resource overlap occurs and reliability is compromised. In non-overlapping scenarios, control information is transmitted separately on PUCCH to maintain optimal resource utilization. This partial application of multiplexing balances reliability improvement with resource efficiency.
Solution Approach 2:
The patent changes the transmission parameter of control information dynamically - switching between separate transmission (PUCCH) and multiplexed transmission (PUSCH) based on resource allocation parameters. This parameter change allows the system to adapt to different resource utilization conditions while maintaining reliability.
3Reliability
If time-domain repeated transmission is used, then transmission reliability improves, but transmission latency increases
Solution Approach 1:
The patent performs preliminary resource allocation and conflict detection before transmission, allowing the terminal device to proactively determine the optimal transmission method (separate or multiplexed) to avoid the need for retransmission. This preliminary action prevents latency increases that would result from time-domain repeated transmission.
Solution Approach 2:
The patent implements feedback mechanisms where the network device receives control information and provides acknowledgments, allowing the terminal device to determine whether retransmission is necessary. This feedback-driven approach reduces unnecessary repeated transmissions and minimizes latency while maintaining reliability.
Data Source
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AI summary
Embodiments of this disclosure provide a communication method and apparatus, a terminal device, a network device, and a medium. In the method, the terminal device receives first scheduling information from the network device, where the first scheduling information indicates a set of shared channel transmission occasions and a first beamforming manner of a shared channel. The terminal device receives second scheduling information from the network device, where the second scheduling information indicates a control channel transmission occasion and/or a second beamforming manner of a control channel. If the terminal device determines that time domain resources of the control channel transmission occasion and one or more shared channel transmission occasions in the set of shared channel transmission occasions at least partially overlap, the terminal device determines at least one shared channel transmission occasion from the set based on at least one of the first beamforming manner and the second beamforming manner. The terminal device sends control information associated with the control channel to the network device on the at least one shared channel transmission occasion. In this manner, performance of communication between the terminal device and the network device can be improved.