Uplink Control Information Transmission Using Orthogonal Cover Codes
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Solution Overview
Problem
In new radio (NR) communications systems, there is no established method for transmitting uplink control information of lengths between 2 and X bits, where X is undefined, limiting transmission flexibility and resource utilization.
Innovation Solution
A communication method that involves repeating uplink control information multiple times and using orthogonal cover codes to arrange frequency-domain data in a staggered comb-like structure, allowing multiple terminals to share the same resource for transmission, with the number of repetitions determined based on channel state information or symbol quantities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uplink control information is transmitted using existing LTE PUCCH formats for lengths between 2 and X bits, then transmission can be performed, but transmission flexibility and resource utilization are limited
Solution Approach 1:
The patent applies dynamics by making the PUCCH format configurable and adaptable based on the length of uplink control information. The system dynamically selects between different transmission approaches (repetition with orthogonal cover codes for shorter UCI, direct mapping for longer UCI) based on the actual data length, enabling flexible resource utilization without fixed format constraints
Solution Approach 2:
The patent changes key parameters including the number of repetitions N, the orthogonal cover code length M, and the mapping relationship between resource elements and modulation symbols. These parameter adjustments allow the system to optimize transmission for different UCI lengths, improving both flexibility and resource efficiency
2Reliability
If uplink control information is repeated multiple times to improve frequency diversity, then transmission reliability increases, but resource consumption increases
Solution Approach 1:
The patent merges multiple transmission instances by repeating the uplink control information N times and combining them using orthogonal cover codes. This allows frequency diversity gains from multiple transmissions while maintaining efficient resource usage through coherent combining at the receiver, effectively multiplying reliability without linearly increasing resource consumption
Solution Approach 2:
The patent applies partial action by using a moderate number of repetitions N (not excessive full repetition) combined with orthogonal cover codes of length M. This provides sufficient frequency diversity for reliable transmission while avoiding unnecessary resource consumption that would result from excessive repetition
3Productivity
If multiple terminals share the same resource for uplink control information transmission, then resource utilization improves, but transmission conflicts may occur
Solution Approach 1:
The patent introduces orthogonal cover codes as intermediaries between multiple terminals sharing the same physical resource. Each terminal is assigned a unique orthogonal cover code, which acts as a mediator that separates their transmissions in the code domain, allowing simultaneous resource sharing without conflicts while maintaining high resource utilization
Data Source
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AI summary
This application provides a communication method, a terminal, and a network device. The communication method includes: repeating, by a first terminal, to-be-transmitted uplink control information for N times to obtain a first data segment, where N is a positive integer; determining, by the first terminal, an orthogonal cover code based on N; multiplying, by the first terminal, the first data segment by the orthogonal cover code to obtain a second data segment; and sending, by the first terminal, the second data segment. By using the communication method, the terminal, and the network device provided in this application, frequency diversity gains of the uplink control information can be increased, transmission flexibility of the uplink control information can be improved, and resource utilization can be increased.