Mobile Station Resource Determination for Reduced Capability NR Devices
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Solution Overview
Problem
Current 5G mobile communication systems face challenges in improving the received quality of downlink signals, particularly for reduced capability NR devices with fewer antennas, which results in reduced coverage and reception accuracy compared to devices supporting earlier releases like Rel-15/16.
Innovation Solution
The method involves determining and using specific time resources for repetition in mobile stations with fewer antennas, allowing them to receive downlink signals with improved quality by combining signals across multiple time resources, equivalent to those used by more capable devices, without requiring changes to the base station or other mobile stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If reduced capability NR devices use fewer antennas, then device complexity is reduced, but received quality of downlink signal deteriorates
Solution Approach 1:
The patent applies periodic action by transmitting the same downlink signal multiple times across different time resources. Reduced capability NR devices perform repeated receptions and combine these periodic transmissions to improve signal quality, compensating for the limitation of having fewer antennas while maintaining device simplicity
Solution Approach 2:
The patent transitions from spatial diversity (multiple antennas) to temporal diversity (multiple time resources) to achieve the same signal quality improvement. By utilizing the time dimension for signal repetition and combination, the system compensates for reduced spatial diversity in devices with fewer antennas
2Ease of manufacture
If reduced capability NR devices use fewer antennas, then manufacturing cost is reduced, but coverage deteriorates
Solution Approach 1:
The base station transmits downlink signals periodically across multiple time resources, and reduced capability NR devices combine these repeated transmissions. This temporal repetition extends the effective coverage area without requiring additional antennas in the devices, maintaining ease of manufacture while improving coverage
Solution Approach 2:
The system compensates for reduced spatial coverage capability (due to fewer antennas) by utilizing the time dimension for signal repetition. This dimensional transition allows extended coverage without increasing device complexity or manufacturing cost
3Adaptability or versatility
If different time resources are configured for different mobile station types, then adaptability is improved, but device complexity increases
Solution Approach 1:
The base station pre-configures time resource information for different mobile station types through higher layer signaling. Reduced capability NR devices receive this configuration in advance, which simplifies their resource determination process while maintaining adaptability to different device types
Solution Approach 2:
The base station acts as an intermediary that manages the complexity of resource configuration. By centrally determining and signaling appropriate time resources for different device types, the base station relieves the complexity burden from the devices themselves while maintaining system adaptability
Data Source
AI summary
This mobile station is provided with a control circuit that, on the basis of information relating to a plurality of second time resources including a first time resource set to a first type of mobile station, decides a resource used for repeat transmission to a second type of mobile station, and a reception circuit that receives signals by a resource.