Uplink Control Channel Transmission Method for 5G NR
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Solution Overview
Problem
In 5G NR communication systems, the flexible configuration of Physical Uplink Control Channel (PUCCH) resources is limited, making it difficult to ensure reliable transmission of Uplink Control Information (UCI) due to varying bit rates, which can lead to incorrect demodulation by network devices.
Innovation Solution
The terminal device determines the maximum code rate for PUCCH transmission based on the service type and UCI type, optimizing the UCI to ensure reliable transmission within a controllable bit rate range, and the network device configures maximum code rates for different UCI types and services to manage bit rates effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a relatively small PUCCH carries multi-bit UCI, then the PUCCH resource utilization is improved, but the bit rate of the UCI becomes greater than 1 which causes incorrect demodulation by the network device
Solution Approach 1:
The patent applies dynamics by making the PUCCH format selectable and adjustable based on the UCI bit rate. The terminal device determines the UCI bit rate and selects an appropriate PUCCH format (first format for bit rate ≤1, second format for bit rate >1) from multiple available formats, allowing the system to dynamically adapt to different transmission conditions and ensure reliable demodulation while maintaining resource utilization efficiency.
2Device complexity
If the PUCCH resource is limited in flexibility, then the system complexity is reduced, but it becomes difficult to ensure that the transmission bit rate of PUCCH meets the demodulation requirement
Solution Approach 1:
The patent applies segmentation by dividing PUCCH resources into multiple formats with different characteristics. The terminal device segments the UCI transmission based on the calculated bit rate, selecting from pre-configured PUCCH formats (first format for lower bit rates, second format for higher bit rates). This segmentation allows the system to maintain manageable complexity while ensuring the transmission bit rate meets demodulation requirements through appropriate format selection.
3Device complexity
If different UCI types and services are transmitted with equal priority, then the system simplicity is maintained, but the transmission reliability for different service types (URLLC, eMBB, mMTC) cannot be optimized
Solution Approach 1:
The patent applies local quality by assigning different priorities to different UCI types and services locally. The terminal device determines priorities for different services (URLLC, eMBB, mMTC) and UCI types, then uses these priorities to determine which UCI to carry in the PUCCH when the bit rate exceeds the threshold. This allows each service type to receive appropriate transmission reliability optimization without requiring complex system-wide prioritization mechanisms.
Data Source
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AI summary
Provided in an embodiment of the present application are an uplink control channel transmission method, a terminal device and a network device. The terminal device determines, according to the maximum code rate at which an uplink control channel is transmitted, uplink control information carried in the uplink control channel; and optimization can be performed according to different uplink control information to ensure reliable transmission of the uplink control information. The method comprises: the terminal device determines, from the maximum code rate of at least one uplink control channel, the maximum code rate at which the uplink control channel is transmitted; and the terminal device determines, according to the maximum code rate at which the uplink control channel is transmitted, uplink control information carried in the uplink control channel.