PUCCH Frequency Hopping Patterns for Reliable RedCap Transmission
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Solution Overview
Problem
Existing frequency hopping mechanisms in contention-based random access (CBRA) processes fail to ensure reliable PUCCH transmission for UEs with varying capabilities, particularly for RedCap UEs with limited bandwidth, leading to incomplete transmission and process failure.
Innovation Solution
Implementing two types of PUCCH frequency hopping patterns: one with adjacent time domain symbols and one with an interval between symbols, allowing UEs with different capacities to complete transmission by adjusting frequency hopping based on their capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single frequency hopping pattern with adjacent time domain symbols is used, then transmission speed is improved for high-performance UEs, but transmission reliability deteriorates for RedCap UEs with limited bandwidth
Solution Approach 1:
The patent applies dynamics by making the frequency hopping pattern adaptable rather than fixed. The system dynamically selects between first-type (adjacent symbols) and second-type (interval symbols) frequency hopping patterns based on UE capability indicators. This allows the transmission parameters to adjust in real-time according to the terminal's processing capabilities, ensuring both high-speed transmission for capable UEs and reliable transmission for limited-capability RedCap UES
Solution Approach 2:
The patent changes the time domain parameter of frequency hopping by introducing two distinct patterns: one with adjacent time domain symbols and another with interval symbols between hopping instances. The network configures different patterns based on UE capability, transforming a static parameter into a flexible one that can be optimized for different terminal types, thereby resolving the contradiction between speed and reliability
2Productivity
If frequency hopping occupies adjacent time domain symbols, then spectral efficiency is improved, but adaptability to different UE capabilities deteriorates
Solution Approach 1:
The patent segments the frequency hopping mechanism into two distinct types: first-type hopping with adjacent time domain symbols for high spectral efficiency, and second-type hopping with interval symbols for better adaptability. This segmentation allows the system to apply the appropriate hopping type based on UE capability, achieving both high spectral efficiency when possible and broad adaptability across different terminal types
Solution Approach 2:
The patent creates a universal frequency hopping framework that can serve multiple UE types through the second-type pattern with interval symbols. This pattern acts as a fallback mechanism that ensures compatibility and reliability for RedCap UES while maintaining support for high-performance UES through the first-type pattern, achieving multi-functionality across different capability levels
Data Source
AI summary
Provided are a channel transmission and reception method, a communication node, and a storage medium. The channel transmission method includes determining a physical uplink control channel (PUCCH) frequency hopping pattern, where the PUCCH frequency hopping pattern is one of preset frequency hopping patterns, and the preset frequency hopping patterns include at least two types of frequency hopping patterns; where in a first-type frequency hopping pattern, a PUCCH before and after hopping occupies adjacent time domain symbols, and in a second-type frequency hopping pattern, an interval exists between time domain symbols occupied by the PUCCH before and after the hopping; and transmitting a PUCCH corresponding to the PUCCH frequency hopping pattern according to the PUCCH frequency hopping pattern.