PUCCH Format 1 Orthogonal Cover Code Index Configuration
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Solution Overview
Problem
Current methods for configuring a long Physical Uplink Control Channel (PUCCH) in wireless cellular communication systems face challenges in supporting terminal multiplexing and ensuring sufficient coverage, especially when transmission power is insufficient, and in efficiently managing frequency resources.
Innovation Solution
A method and device for configuring an index of orthogonal cover code (OCC) to enable or disable frequency hopping and adjust the number of transmission symbols for PUCCH format 1, allowing for improved frequency diversity and multiplexing of signals from multiple terminals using a spreading code scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is enabled for PUCCH format 1, then frequency diversity performance is improved, but terminal multiplexing capability deteriorates due to lack of spreading code differentiation
Solution Approach 1:
The patent applies parameter changes by dynamically selecting spreading code indices based on frequency hopping configuration. When frequency hopping is enabled, specific spreading code indices are selected to maintain orthogonality across frequency hops, thereby achieving both frequency diversity and terminal multiplexing. This resolves the contradiction by changing the spreading code parameter adaptively according to the frequency hopping state.
2Adaptability or versatility
If spreading code is applied to PUCCH format 1, then terminal multiplexing is improved, but transmission power efficiency deteriorates when transmission power is insufficient
Solution Approach 1:
The patent implements dynamics by making the spreading code application conditional rather than static. The spreading code is applied only when frequency hopping is enabled and specific conditions are met, allowing the system to dynamically adjust between spreading code-based multiplexing and non-spreading transmission based on power availability and frequency hopping configuration, thus optimizing power efficiency while maintaining multiplexing capability when needed.
3Length of stationary object
If long PUCCH transmission is configured with more symbols, then coverage is improved, but frequency resource utilization deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the long PUCCH transmission into multiple segments with different spreading code indices. This allows the system to maintain long transmission length for coverage while using code division to efficiently pack multiple terminal signals into the same frequency resources, thereby improving frequency resource utilization despite the extended transmission duration.
Data Source
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AI summary
The present disclosure relates to: a communication technique for converging an IoT technology and a 5G communication system for supporting a higher data transfer rate beyond a 4G system; and a system therefor. The present disclosure can be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, security and safety-related service, etc.) on the basis of a 5G communication technology and an IoT-related technology. The present invention relates to a method for transmitting uplink control information (UCI) by a terminal in a wireless communication system, the method comprising: receiving physical uplink control channel (PUCCH) configuration information from a base station; and transmitting, to the base station, UCI in a PUCCH to which PUCCH format 1 has been applied on the basis of the PUCCH configuration information, wherein the PUCCH configuration information contains spreading code index information, and the spreading code index information is determined on the basis of the length of a spreading code to be applied to symbols through which the UCI is to be transmitted, among symbols through which the PUCCH is to be transmitted.