Uplink Timing Determination for 5G Latency Reduction
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a challenge in determining uplink signal transmission timing to minimize delay when multiple services such as eMBB, URLLC, and mMTC need to coexist, as existing methods do not efficiently manage the timing to ensure reliable and low-latency data transmission across different frequency bands.
Innovation Solution
The proposed solution involves configuring the terminal to operate in a latency reduction mode, where the uplink signal transmission timing is adjusted based on higher layer signaling, allowing for faster response and reduced latency by decoding control signals, enabling simultaneous transmission of eMBB, URLLC, and mMTC data within the same time interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional uplink transmission timing is used (fixed timing based on subframe configuration), then system stability is maintained, but latency cannot be reduced for time-sensitive services
Solution Approach 1:
The patent applies dynamics by making the uplink transmission timing flexible rather than fixed. The terminal determines transmission timing dynamically based on whether latency reduction mode is configured and based on the specific downlink reception timing. This allows the system to adapt timing to service requirements while maintaining simplicity through clear determination rules.
2Speed
If latency reduction mode is configured with flexible timing, then transmission speed is improved, but system complexity increases due to multiple timing determination methods
Solution Approach 1:
The patent applies local quality by providing different timing determination methods for different service requirements. Latency-sensitive services use the latency reduction mode with flexible timing, while other services use conventional fixed timing. This allows optimized performance for specific applications without increasing overall system complexity.
Solution Approach 2:
The patent segments the timing determination process into distinct modes: latency reduction mode for time-sensitive services and conventional mode for other services. Each mode has its own clear determination rules, which simplifies management compared to a single complex unified approach.
3Productivity
If multiple services (eMBB, URLLC, mMTC) share the same time interval, then resource utilization is improved, but timing synchronization becomes more difficult
Solution Approach 1:
The patent applies local quality by providing different timing determination methods for different service requirements. Latency-sensitive services use the latency reduction mode with flexible timing, while other services use conventional fixed timing. This allows optimized performance for specific applications without increasing overall system complexity.
Data Source
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AI summary
A communication method and system are provided for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for Internet of things (IoT). The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A wireless communication system, and more particularly, a method and device for determining uplink signal transmission timing is provided.