Unlicensed Band Control Signaling Detection via Dynamic Location Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 5G mobile communication system, the use of unlicensed frequency bands for communication between terminals and base stations poses challenges due to unpredictable channel occupancy times and interference from other systems, making pre-configured detection locations unsuitable.
Innovation Solution
The method involves including an information field in the downlink control information that indicates a detection location for control signaling in the unlicensed frequency band, allowing terminals to accurately receive control signaling by detecting it at the specified location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-configured detection locations are used for control signaling, then terminal detection is simplified and reliable, but the method becomes unsuitable for unlicensed frequency bands with unpredictable channel occupancy
Solution Approach 1:
The patent applies dynamics by making the detection location flexible and adaptable rather than fixed. The terminal device dynamically adjusts the detection location of control signaling based on feedback information from the network device, allowing the system to adapt to the unpredictable channel occupancy characteristics of unlicensed frequency bands while maintaining reliable detection
2Productivity
If the base station occupies the channel for longer duration, then more data can be transmitted, but the channel may be occupied by other systems causing interference
Solution Approach 1:
The patent applies periodic action through the listen-before-talk (LBT) mechanism, where the base station periodically senses the channel status before transmitting control signaling. This periodic channel access allows the system to transmit data efficiently when the channel is available while avoiding interference from other systems by yielding when the channel is occupied, creating a rhythmic pattern of transmission and sensing
3Measurement precision
If the terminal detects control signaling at multiple possible locations, then detection accuracy improves, but detection complexity and time consumption increase
Solution Approach 1:
The patent applies segmentation by dividing the potential detection locations into multiple candidate positions and using feedback information to indicate which specific location contains the control signaling. This segmentation approach allows the terminal to maintain high detection accuracy by knowing the exact location while avoiding the complexity of simultaneously monitoring all possible locations
Data Source
AI summary
A method for detecting control signaling includes: receiving downlink control information, the downlink control information includes an information field, and the information field is configured to indicate a detection location of the control signaling in an unlicensed frequency band; and receiving the control signaling at the detection location in the unlicensed frequency band according to the information field.