PUCCH Signaling via Multi-Beam Diversity
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Solution Overview
Problem
Current wireless communication systems face challenges in enhancing the robustness of physical uplink control channel (PUCCH) decoding at transmission points (TXPs), particularly in ensuring reliable transmission and decoding of uplink control information.
Innovation Solution
The method involves user equipment (UE) transmitting multiple copies of the same uplink control information in multiple beam directions to one or more transmission points (TXPs), utilizing transmit and/or receive diversity to improve transmission robustness, and employing techniques like time-division multiplexing (TDM) or encoding with redundancy versions (RVs) to facilitate joint decoding by TXPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple copies of uplink control information are transmitted in multiple beam directions, then decoding robustness is improved, but device complexity increases
Solution Approach 1:
The uplink control information is segmented into multiple copies that are transmitted through different beam directions. Each copy traverses a distinct spatial path, thereby diversifying the transmission channels and improving the probability of successful decoding at the transmission point.
Solution Approach 2:
The patent introduces spatial dimensionality by transmitting identical control information across multiple beam directions. This dimensional expansion transforms a single-path transmission into a multi-path spatial distribution, enabling the receiver to exploit spatial diversity for enhanced robustness.
2Reliability
If multiple beam directions are used for transmission, then transmission robustness is improved, but loss of time increases
Solution Approach 1:
The patent employs periodic transmission of control information copies across different beam directions. By systematically alternating between beams in a predetermined sequence, the system ensures comprehensive coverage while maintaining temporal efficiency and avoiding redundant transmissions.
Solution Approach 2:
Multiple transmissions carrying the same control information are merged at the transmission point through joint decoding processes. This combining approach consolidates the information from various beam directions into a unified decoding operation, improving reliability without proportionally increasing total transmission time.
3Reliability
If multiple copies of control information are transmitted, then decoding robustness is improved, but use of energy increases
Solution Approach 1:
The patent applies local quality by directing transmission energy into specific, targeted beam directions rather than omnidirectional broadcasting. Each beam is precisely oriented toward its intended reception point, concentrating energy efficiently and reducing overall power consumption while maintaining robustness through spatial diversity.
Solution Approach 2:
Instead of transmitting a single high-power signal, the system creates multiple lower-power copies of the control information distributed across different beams. This copying strategy reduces the energy burden on the user equipment while achieving the same robustness through redundancy, as each copy requires less energy but collectively they provide enhanced reliability.
Data Source
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AI summary
Wireless communications systems and methods related to transmitting uplink control information. A first wireless communication device receives a transmission configuration indicating first beam information and second beam information. The first beam information and the second beam information are different. The first wireless communication device transmits a first uplink control signal based on the first beam information. The first wireless communication device transmits a second uplink control signal based on the second beam information. The first uplink control signal and the second uplink control signal represent the same control information. Other aspects, embodiments, and features are also claimed and described.