Sequence-Based PUCCH Configuration for Short Uplink Control Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Future radio communication systems face challenges in maintaining coverage, throughput, and signal quality due to the introduction of diverse numerologies and shorter UL control channels, which can degrade performance when using existing LTE transmission methods.
Innovation Solution
Implementing sequence-based PUCCHs with flexible configuration of base sequences and CS candidate sets, using cyclic shifts and orthogonal sequences to multiplex UCI signals, and employing maximum likelihood detection for accurate decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing LTE transmission methods are used in future radio communication systems with diverse numerologies and shorter UL control channels, then device compatibility is maintained, but coverage and throughput deteriorate
Solution Approach 1:
The patent applies dynamics by making the PUCCH format selectable and configurable based on transmission conditions. The system dynamically chooses between different PUCCH formats (existing LTE formats and new sequence-based formats) depending on the numerology, channel conditions, and service requirements, allowing the system to adapt to future radio communication demands while maintaining backward compatibility
Solution Approach 2:
The patent changes key parameters of the PUCCH transmission by introducing sequence-based PUCCH formats with configurable base sequences, cyclic shifts, and orthogonal cover codes. These parameter changes enable the system to achieve better coverage and throughput in future radio communication systems while the existing LTE formats remain available for legacy compatibility
2Reliability
If sequence-based PUCCH formats are introduced for future radio communication systems, then coverage and throughput are improved, but system complexity increases
Solution Approach 1:
The patent segments the PUCCH transmission system into multiple independent formats, separating existing LTE PUCCH formats from new sequence-based formats. This segmentation allows each format to be optimized independently for its specific use case, managing complexity by organizing the system into distinct, well-defined components with clear selection criteria
Solution Approach 2:
The patent introduces a format selection mechanism that acts as an intermediary between the transmission requirements and the actual PUCCH format used. This intermediary layer manages the complexity by providing a systematic way to choose appropriate formats based on numerology and channel conditions, shielding the underlying complexity from the user
3Loss of time
If shorter UL control channels are used in future radio communication systems, then transmission latency is reduced, but signal quality and coverage deteriorate
Solution Approach 1:
The patent changes the physical parameters of the PUCCH transmission by introducing sequence-based formats with configurable properties such as base sequence length, cyclic shift values, and orthogonal cover code lengths. These parameter changes enable shorter transmission durations (reducing latency) while maintaining or improving signal quality through optimized sequence design and processing gain
Data Source
Figure 1A~1B
Figure 2A~2D
Figure 3
AI summary
The present invention is designed so that UL signals can be transmitted properly in future radio communication systems. According to one aspect of the present invention, a user terminal has a transmission section that transmits a sequence, which is derived from a base sequence by using a cyclic shift associated with a value of uplink control information, and a control section that controls selection of a set, comprised of a plurality of cyclic shifts that are associated with a plurality of candidate values of the uplink control information, respectively, and the base sequence, based on a parameter that is reported from a radio base station.