Uplink Control Channel Format Selection for Wireless Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing wireless communication systems, particularly in next-generation radio access technologies like NR, face challenges in efficiently transmitting uplink control information due to varying payload sizes and resource requirements, which is not adequately addressed by the formats used in legacy systems like LTE.
Innovation Solution
A method for transmitting uplink control information using specific physical uplink control channel (PUCCH) formats determined by the number of symbols and bits, with formats like PUCCH 0, 1, 2, 3, and 4, allowing for dynamic configuration based on resource availability and payload size, and supporting multiplexing with other UEs in certain formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single uplink control channel format is used for all payload sizes, then device complexity is reduced, but resource efficiency deteriorates due to resource wastage
Solution Approach 1:
The patent implements dynamic selection of PUCCH formats based on the payload size of uplink control information. The system transitions from a static single-format approach to a dynamic multi-format approach where the appropriate format (0, 1, 2, 3, or 4) is selected according to the number of bits to be transmitted, thereby optimizing resource efficiency without significantly increasing device complexity
Solution Approach 2:
The patent changes the parameters of the PUCCH format selection based on the payload size parameter. Different formats are defined with different characteristics (short/long duration, frequency hopping, modulation schemes) and the system selects the appropriate format by changing these parameters according to the control information size, resolving the contradiction between simplicity and efficiency
2Adaptability or versatility
If legacy LTE PUCCH formats are applied to NR, then system compatibility is improved, but adaptability deteriorates due to varying payload sizes and resource requirements
Solution Approach 1:
The patent segments the uplink control channel into multiple PUCCH formats (0-4) with distinct characteristics suited for different payload sizes and service requirements. This segmentation allows the system to handle diverse uplink control information efficiently while maintaining a structured and manageable format configuration, resolving the contradiction between adaptability and complexity
Solution Approach 2:
The patent creates a universal PUCCH format framework that can handle various uplink control information types (HARQ-ACK, CSI, SR) with different payload sizes through a single set of standardized formats. This multi-functional approach improves adaptability while keeping the device complexity manageable through standardized procedures
3Loss of time
If short PUCCH duration (1-2 symbols) is used, then transmission time is reduced, but information capacity deteriorates due to limited bits transmission
Solution Approach 1:
The patent implements dynamic matching between PUCCH duration and payload size. Short formats (0, 2) are assigned to small payloads (1-2 bits) to minimize transmission time, while long formats (1, 3, 4) are assigned to larger payloads to provide sufficient information capacity. This dynamic allocation resolves the contradiction between transmission time and information capacity
Data Source
AI summary
A method for transmitting uplink control information of a terminal in a wireless communication system and a terminal using the method are provided. The method generates uplink control information, transmits the uplink control information to a base station using a specific PUCCH format among a plurality of physical uplink control channel (PUCCH) formats, wherein the specific PUCCH format which is used is determined on the basis of the number of symbols in the time domain used for transmission of uplink control information and the number of bits of the uplink control information.