5G Delay Measurement Feedback Using Clock Reference Signals
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Solution Overview
Problem
In 5G communication systems, there is no real-time mechanism for measuring and feeding back delay information, leading to scheduling congestion and prolonged terminal-to-terminal data transmission delays, as the packet delay budget is preset and not dynamically adjusted.
Innovation Solution
A method and apparatus for measuring and feeding back delay information by receiving and demodulating physical layer signals carrying clock reference information, determining delay based on this information and the actual arrival time, and feeding it back to optimize queuing priority in the protocol stack or scheduling mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preset packet delay budget is used in 5G QoS feature parameter information, then service quality can be evaluated and regulated, but real-time delay measurement and feedback mechanism is missing leading to scheduling congestion and prolonged transmission delay
Solution Approach 1:
The patent introduces a feedback mechanism where the reception terminal measures actual delay information by comparing actual arrival time with clock reference information, and feeds back this delay data to the transmission terminal. This enables real-time adjustment of scheduling based on actual measured delay, resolving the contradiction between preset QoS evaluation and real-time transmission optimization.
Solution Approach 2:
The transmission terminal performs preliminary actions by transmitting clock reference information before the actual data transmission. This allows the reception terminal to measure delay in advance and provide feedback that can be used for real-time scheduling adjustments, preventing congestion before it occurs.
2Device complexity
If no real-time delay measurement mechanism is implemented, then device complexity is reduced, but scheduling cannot be optimized in time causing congestion and prolonged delay
Solution Approach 1:
The patent implements a feedback loop where delay information is measured at the reception terminal and fed back to the transmission terminal. This enables the transmission terminal to adjust scheduling in real-time based on actual delay conditions, significantly improving scheduling efficiency without requiring overly complex measurement infrastructure.
Solution Approach 2:
The reception terminal performs self-service by autonomously measuring delay information using its own local clock reference and actual arrival time, then feeding back this information. This distributed approach improves scheduling efficiency without centralizing complex measurement functions.
3Device complexity
If delay information is not fed back in real-time, then system complexity is minimized, but terminal-to-terminal delay cannot be shortened due to lack of real-time scheduling adjustment
Solution Approach 1:
The patent establishes a real-time feedback mechanism where delay information is measured and fed back continuously. This enables the transmission terminal to adjust scheduling dynamically based on actual delay conditions, significantly shortening terminal-to-terminal transmission delay despite the added system complexity.
Solution Approach 2:
The patent introduces dynamic adjustment capabilities where scheduling parameters are not fixed but can be adjusted in real-time based on feedback delay information. This dynamic approach optimizes transmission performance adaptively, resolving the contradiction between system complexity and transmission delay reduction.
Data Source
AI summary
A method, a communication device, an apparatus, and a storage medium for measuring and feeding back delay information. The method comprises: receiving, by a reception terminal, a physical layer signal or channel that is transmitted by a transmission terminal and carries clock reference information corresponding to a service to be transmitted, wherein the clock reference information represents reference arrival time of the service to be transmitted to the reception terminal; demodulating, by the reception terminal, the physical layer signal or channel, obtaining, by the reception terminal, the clock reference information, and determining, by the reception terminal, corresponding delay information at least based on the clock reference information and actual arrival time of the physical layer signal or channel; and feeding back, by the reception terminal, the delay information to a target terminal.