5G TDD Subframe Configuration for Latency Control
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Solution Overview
Problem
The 5G TDD system faces challenges in meeting maximum latency requirements, particularly in dynamically switching between uplink and downlink subframes, which hinders efficient data transmission and reception, especially for ultra-reliable and low-latency communications (URLLC) and beyond-5G services.
Innovation Solution
The method involves classifying subframes into fixed, RRC, and dynamic types, allowing for dynamic switching to ensure that data transmission and reception do not exceed maximum latency times, and allocating resources effectively in both TDD and FDD systems to support various services like eMBB, mMTC, and URLLC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If subframes are fixed in TDD system, then system stability is improved, but latency requirement cannot be met
Solution Approach 1:
The patent applies dynamics by enabling subframes to switch between uplink and downlink configurations based on service requirements. Specifically, subframes that can dynamically switch are identified and reconfigured via RRC signaling to accommodate low-latency services, transforming the static TDD structure into a dynamic one that adapts to different service needs while maintaining overall system stability.
2Loss of time
If subframes dynamically switch between uplink and downlink, then latency is reduced, but system complexity increases
Solution Approach 1:
The patent segments subframes into three distinct types: fixed subframes, RRC subframes that can dynamically switch, and subframes for other services. This segmentation allows the system to manage complexity by treating different subframe types differently, applying dynamic switching only where necessary while maintaining simplicity in fixed subframes, thus reducing overall system complexity burden.
Solution Approach 2:
The patent applies local quality by allowing only specific subframes (those capable of dynamic switching) to change configuration, while other subframes remain fixed. This localized approach to dynamic switching reduces the complexity impact to minimal areas while achieving latency reduction benefits where needed, rather than making the entire system complex.
3Productivity
If multiple communication systems coexist on same carrier frequency, then resource utilization is improved, but interference between systems increases
Solution Approach 1:
The patent resolves interference by introducing a new dimension of control through RRC signaling for subframe configuration. Instead of only time-domain or frequency-domain separation, the system adds a configuration dimension where base stations can dynamically indicate uplink/downlink subframe types to terminals via RRC messages, enabling coordinated multi-system operation on the same carrier frequency while managing interference through explicit configuration signaling.
Data Source
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AI summary
The present disclosure relates to a communication method and system 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 present disclosure 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. The present invention suggests a method for transmitting and receiving signals satisfying a maximum delay time, and a method and a device for effectively processing signals that are influenced by the transmission and reception of the signals satisfying the maximum delay time.