Uplink Control Channel Transmission Using Dynamic Symbol Allocation
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Solution Overview
Problem
Conventional LTE systems face challenges in transmitting uplink control information efficiently, particularly in 5G communication systems, where low latency and scalability requirements are not met due to limitations in the design of the physical uplink control channel, leading to issues with coverage and flexibility.
Innovation Solution
A method is introduced where a terminal generates and transmits uplink control information with a demodulation reference signal (DMRS) mapped to odd-numbered symbols, allowing for flexible allocation and processing of symbols, enabling efficient transmission and reception of control information with varying bit sizes without performance deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the physical uplink control channel is transmitted for one subframe on the time axis with frequency hopping on a slot basis, then frequency diversity is obtained, but low latency requirements and scalability are not satisfied
Solution Approach 1:
The patent segments the uplink control channel transmission by introducing a short PUCCH format that can be transmitted within a single slot rather than requiring a full subframe. This segmentation allows the control channel to be transmitted more quickly, reducing latency while maintaining frequency diversity through selective resource allocation.
Solution Approach 2:
The patent introduces dynamic flexibility by allowing the number of symbols for short PUCCH to be configured based on network conditions and requirements. The symbol allocation can be adjusted dynamically, enabling the system to adapt between different latency requirements while maintaining frequency diversity when needed.
2Device complexity
If the number of symbols for physical uplink control channel is fixed, then transmission is simplified, but scalability and flexibility are limited
Solution Approach 1:
The patent implements dynamic symbol allocation for short PUCCH by introducing configurable parameters that allow the number of symbols to be adjusted based on network requirements. This dynamic approach enables scalability while maintaining relatively simple transmission procedures through standardized formatting and signaling mechanisms.
Solution Approach 2:
The patent changes key parameters of the PUCCH format, specifically allowing the number of symbols to be variable rather than fixed. This parameter change enables the system to scale flexibly to different service requirements while maintaining transmission simplicity through consistent procedural handling of the variable parameter.
3Device complexity
If uplink control information is transmitted with fixed resource allocation, then resource management is simplified, but efficiency for varying bit sizes deteriorates
Solution Approach 1:
The patent introduces dynamic resource allocation for short PUCCH where the number of resource blocks and symbols can be adjusted based on the size of uplink control information. This dynamic allocation improves transmission efficiency for varying bit sizes while maintaining relatively simple resource management through standardized allocation rules and signaling.
Solution Approach 2:
The patent enables parameter changes in resource allocation by allowing the number of resource blocks and symbols to be configured based on UCI size requirements. This parameter flexibility improves transmission efficiency while maintaining resource management simplicity through consistent allocation procedures and signaling mechanisms.
Data Source
AI summary
The present invention relates to: a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present invention can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. In addition, the purpose of the present invention is to provide an operating method and device of a terminal and a base station, which are for transmitting uplink control information in a communication system.