PUCCH Repetition Resource Mapping for TDD Coverage and Delay
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Solution Overview
Problem
Uplink control channels in 5G communication systems face challenges due to antenna loss in user terminals like smart watches, leading to reduced transmit power, coverage issues, and decoding performance problems, especially for services like URLLC and VoNR, which are sensitive to delay, and the inflexibility of PUCCH repetition in TDD scenarios.
Innovation Solution
A method for determining resource locations of actual repetitions based on configuration information for nominal repetitions, optimizing the transmission and reception of uplink control channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If repetition is used to extend uplink channel coverage, then coverage is improved, but data rate decreases at the cell edge
Solution Approach 1:
The patent segments the uplink control channel transmission into multiple actual repetitions distributed across different time slots, rather than using a single continuous transmission. This allows the system to achieve coverage extension through multiple opportunities while maintaining better resource utilization and reducing the impact on data rate by spreading transmissions over time.
Solution Approach 2:
The patent introduces dynamic resource allocation for actual repetitions, where the starting time slots and resource assignments can be flexibly adjusted based on channel conditions and traffic requirements. This dynamic approach allows the system to optimize between coverage and data rate by adapting repetition parameters to current network conditions.
2Length of stationary object
If PUCCH repetition is implemented in TDD systems, then coverage is enhanced, but flexibility in transmission position is restricted
Solution Approach 1:
The patent implements dynamic determination of starting time slots for actual repetitions, allowing the system to adapt to TDD configurations where different time slots have different directions (uplink/downlink). The starting time slot can be flexibly selected based on the TDD pattern, ensuring that repetitions are placed in valid uplink slots while maintaining coverage enhancement.
Solution Approach 2:
The patent extends the repetition mechanism from a single-dimensional time slot repetition to a multi-dimensional resource allocation that considers time slot direction, resource block assignment, and starting position. This allows the system to navigate the complexity of TDD configurations by operating across multiple resource dimensions.
3Productivity
If PUCCH format 3 uses dynamic PRB allocation based on information load, then resource efficiency is improved, but SINR at the receiving end becomes too low at the cell edge
Solution Approach 1:
The patent applies prior cushioning by ensuring that actual repetitions are allocated with sufficient power and resources in advance, particularly for cell edge users. The starting time slots and resource assignments are determined to guarantee minimum SINR requirements before transmission occurs, compensating for the potential low SINR caused by dynamic PRB allocation.
Solution Approach 2:
The patent changes the allocation parameters for actual repetitions, including starting time slot indices and resource block assignments, to optimize both resource efficiency and SINR. By adjusting these parameters based on user location and channel conditions, the system can maintain resource efficiency while ensuring adequate SINR for reliable detection.
Data Source
AI summary
The present disclosure provides a transmission method of an uplink control channel, a corresponding user equipment, a base station and a computer-readable medium. The transmission method of the uplink control channel comprising: obtaining configuration information related to a nominal repetition; determining resource locations of one or more actual repetitions according to the configuration information related to the nominal repetition; and transmitting information according to the resource locations.