Short PUCCH Resource Segmentation for 5G Uplink Control
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Solution Overview
Problem
In the 5G New Radio (NR) system, there is a lack of solution for the transmission design of Reference Signals (RS) and Uplink Control Information (UCI) in the short-PUCCH, which is essential for meeting the requirements of low delay and fast feedback.
Innovation Solution
The method involves dividing time-frequency resources used for short-PUCCH into at least two resource sets, where each resource set is configured differently for transmitting UCI and RS, allowing dynamic adjustment of RS overhead and structure to improve PUCCH demodulation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If short-PUCCH is used to reduce delay and enable fast feedback, then response speed is improved, but transmission design for Reference Signal and UCI is incomplete
Solution Approach 1:
The patent segments the time-frequency resources of short-PUCCH into at least two resource sets: one for Reference Signal transmission and another for UCI transmission. This segmentation allows independent optimization of each signal type while ensuring both are properly supported in the shortened PUCCH format, resolving the incomplete transmission design issue while maintaining the low-latency advantage.
2Measurement precision
If resource sets are divided for UCI and RS transmission, then PUCCH demodulation performance is improved, but resource configuration complexity increases
Solution Approach 1:
The patent introduces dynamic configuration mechanisms where the access network device can flexibly adjust resource set assignments for UCI and RS based on channel conditions and traffic requirements. This dynamic approach optimizes demodulation performance by adapting resource allocation to current conditions while providing standardized configuration procedures to manage complexity.
Solution Approach 2:
The patent utilizes parameter changes in resource set configuration, including frequency domain positions, time domain symbols, and resource element allocations. By systematically varying these parameters according to different transmission scenarios, the patent achieves optimized demodulation performance while maintaining configurable complexity through standardized parameter sets.
3Measurement precision
If frequency domain positions of resource elements are differentiated in resource sets, then channel estimation accuracy is improved, but resource element distribution complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific frequency domain positions to different resource sets based on their functional requirements. Reference Signal resource elements are positioned to maximize channel estimation accuracy, while UCI resource elements are positioned for efficient data transmission. This localized optimization of frequency positions improves channel estimation without requiring complex overall redistribution.
Solution Approach 2:
The patent employs preliminary action by pre-configuring resource set structures with predetermined frequency domain positions for Reference Signals and UCI. These pre-established patterns simplify the configuration process while ensuring optimal channel estimation accuracy is achieved through carefully selected frequency positions that are determined in advance based on theoretical optimization.
Data Source
AI summary
An uplink transmission method, an apparatus, a terminal device, access network device, and system are provided. The method includes: a terminal device determines at least two resource sets, wherein frequency domain positions of at least two resource elements in resource elements in each resource set of the at least two resource sets are different; the terminal device receives configuration signaling sent by access network device; the terminal device determines one or more resource sets of a first category and one or more resource sets of a second category in the at least two resource sets according to configuration signaling, wherein the resource set of the first category is used for transmitting uplink control information in uplink control channel, and the resource set of the second category is used for transmitting an uplink reference signal in the uplink control channel; and the terminal device sends the uplink control channel.