Control Channel False Alarm Detection in URLLC Systems
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Solution Overview
Problem
In LTE systems, false alarms during control information transmission lead to misinterpretations between network devices and terminal devices, causing data demodulation failures and impacting system performance, especially in high-reliability services like URLLC where error rates exceed acceptable limits.
Innovation Solution
Incorporating false alarm indication information into control channels, using a combined state of false alarm indication sequences to determine the presence of false alarms, allowing devices to adjust their operations and reduce the impact on system performance, with methods applicable to both network and terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 16-bit CRC code is used for control information transmission, then the terminal device can perform blind detection and verify control information, but false alarms occur causing misinterpretation between network device and terminal device
Solution Approach 1:
The patent introduces false alarm indication information as an intermediary element in the control information transmission process. This additional information acts as a mediator that helps the terminal device distinguish between genuine control information and false alarms, thereby reducing misinterpretation while maintaining the existing CRC verification mechanism
Solution Approach 2:
The patent implements a feedback mechanism where false alarm indication information is transmitted along with control information, and the terminal device uses this feedback to adjust its interpretation of received control information. This feedback loop enables the system to correct for false alarm conditions and improve overall transmission reliability
2Reliability
If false alarm indication information is added to control channels, then the terminal device can identify and mitigate false alarms, but the control channel structure becomes more complex
Solution Approach 1:
The patent merges false alarm indication information with existing control information structures rather than creating separate transmission channels. By combining multiple functions (control information delivery and false alarm indication) into a unified control channel structure, the patent reduces overall system complexity while maintaining false alarm mitigation capabilities
Solution Approach 2:
The control channel structure is designed to serve multiple functions simultaneously: transmitting scheduling information, control commands, and false alarm indication information. This multi-functional approach eliminates the need for separate dedicated channels for each function, thereby reducing structural complexity
Data Source
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AI summary
Embodiments of the present invention relate to a control information sending method, a control information receiving method, a network device, and a terminal device. The control information receiving method includes: receiving, by a second device, m control channels from a first device, where control information carried on the m control channels corresponds to a same hybrid automatic repeat request HARQ process and is consecutive control information of the HARQ process, control information carried on each of the m control channels includes false alarm indication information, and m is a positive integer greater than or equal to 2; and determining, by the second device based on a combined state of false alarm indication information carried on the m control channels, whether there is a false alarm in control information carried on at least one of the m control channels. In the embodiments of the present invention, a control information receiving device can determine whether there is a false alarm in control information.