PUCCH Repetition for Uplink Coverage in 5G IoT
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 5G communication systems face challenges in efficiently transmitting uplink control channels, particularly in increasing signal coverage and ensuring reliable transmission using limited terminal transmission power.
Innovation Solution
A method and device for repeatedly transmitting physical uplink control channel (PUCCH) information, where a terminal receives PUCCH configuration information from a base station, and repeatedly transmits hybrid automatic repeat request acknowledgment (HARQ-ACK) information on the PUCCH. The PUCCH configuration includes information on multiple PUCCH formats, start symbols, numbers of PUCCH symbols, and the total number of slots or symbols for terminating PUCCH repetition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If repeated PUCCH transmission is performed to increase coverage, then uplink signal coverage is improved, but transmission time and resource consumption increase
Solution Approach 1:
The patent implements dynamic PUCCH repetition by allowing the base station to configure the number of repetitions (K0, K1, K2) flexibly according to channel conditions and terminal capabilities. The repetition count can be adjusted dynamically through RRC signaling, enabling the system to adapt between single transmission and multiple repetitions based on actual coverage requirements, thus resolving the contradiction between coverage enhancement and time consumption.
Solution Approach 2:
The patent changes key transmission parameters including PUCCH format selection (format 0, 1, 2, 3, 4), repetition count (K0-K2), start symbol positions, and resource allocations. By dynamically adjusting these parameters based on channel quality and coverage needs, the system optimizes the balance between achieving sufficient coverage and minimizing transmission time overhead.
2Reliability
If repeated PUCCH transmission is performed to ensure reliable transmission, then transmission reliability is improved, but terminal power consumption increases
Solution Approach 1:
The patent applies partial repetition strategy where the number of PUCCH repetitions is configured based on actual channel conditions rather than always using maximum repetitions. The base station can set K0, K1, or K2 to indicate different repetition counts, allowing the terminal to perform only the necessary number of transmissions to achieve reliable delivery, thus avoiding excessive power consumption while maintaining transmission reliability.
Solution Approach 2:
The system uses feedback mechanisms where the base station receives PUCCH transmissions and can request retransmissions only when necessary. The HARQ-ACK feedback from the base station informs the terminal whether the transmission was successful, allowing the terminal to stop repeating transmissions once reliability is achieved, thereby optimizing power consumption.
3Adaptability or versatility
If multiple PUCCH formats are configured for repeated transmission, then transmission flexibility is improved, but system complexity increases
Solution Approach 1:
The patent segments PUCCH transmission into multiple formats (format 0, 1, 2, 3, 4) with distinct characteristics suitable for different scenarios. Each format has specific properties regarding robustness, payload capacity, and resource requirements. The base station configures multiple formats and indicates which one to use through RRC signaling, allowing the system to select the most appropriate format for each transmission scenario without requiring the terminal to process all formats simultaneously, thus managing complexity.
Solution Approach 2:
The patent creates a universal PUCCH transmission framework that can handle different transmission scenarios using a unified configuration mechanism. The base station configures multiple PUCCH formats and repetition parameters that can be applied universally across different terminals and channel conditions. This multi-functional configuration approach allows the same system to adapt to various requirements without increasing terminal complexity.
Data Source
AI summary
The present disclosure relates to a communication technique that merges IoT technology with a 5G communication system for supporting higher data transmission rates than 4G systems, and a system for same. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. The invention of the present disclosure is a method performed by a terminal of a communication system, the method being characterized by comprising receiving physical uplink control channel (PUCCH) setting information from a base station, receiving a downlink control channel (DCI) which schedules downlink data from the base station, receiving the downlink data, and repeatedly transmitting, to the base station, hybrid automatic repeat request acknowledgement (HARQ-ACK) information for the downlink data on the PUCCH, wherein the PUCCH setting information includes at least one piece of information among a plurality of PUCCH formats for repeatedly transmitting the PUCCH, a set of one or more start symbols, a set of one or more numbers of PUCCH symbols, and the total number of slots or symbols for finishing the PUCCH repetition.