Carrier Aggregation Sensitivity Management via Pre-configured MSD
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Solution Overview
Problem
The impact of harmonics and intermodulation distortion (IMD) on communication systems using carrier aggregation (CA) in 5G mobile communication systems, particularly with combinations of n bands downlink/2 bands uplink, has not been adequately analyzed, leading to unsatisfied reference sensitivity and reduced downlink signal throughput.
Innovation Solution
A device and method for transmitting uplink signals via two E-UTRA operating bands and receiving downlink signals via three E-UTRA operating bands, including pre-configured Maximum Sensitivity Degradation (MSD) values to relax reference sensitivity requirements, specifically for combinations like E-UTRA bands 2, 13, 48, and 66, to mitigate self-interference and maintain effective communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation with n bands downlink and 2 bands uplink is implemented, then downlink throughput is improved, but self-interference from harmonics and IMD degrades reference sensitivity
Solution Approach 1:
The patent applies parameter changes by introducing pre-configured MSD (Maximum Sensitivity Degradation) values that modify the reference sensitivity requirements for specific band combinations. This allows the system to accommodate the sensitivity degradation caused by self-interference while maintaining high throughput by relaxing the sensitivity threshold to acceptable levels.
Solution Approach 2:
The patent implements beforehand cushioning by pre-configuring MSD values for different band combinations before actual communication occurs. These pre-configured values act as a cushion to compensate for the expected sensitivity degradation from harmonics and IMD, ensuring that reference sensitivity requirements are met even in the presence of self-interference.
2Reliability
If strict reference sensitivity requirements are maintained, then communication reliability is improved, but throughput is reduced due to self-interference limitations
Solution Approach 1:
The patent changes the sensitivity requirement parameter by introducing MSD values that are specifically tailored to different band combinations. This allows the system to maintain communication reliability by ensuring minimum sensitivity thresholds are met while permitting higher throughput by allowing controlled sensitivity degradation within the MSD limits.
3Device complexity
If standard reference sensitivity standards are applied to all band combinations, then device complexity is reduced, but performance degrades for specific combinations with high self-interference
Solution Approach 1:
The patent applies local quality by providing differentiated sensitivity requirements through pre-configured MSD values for specific band combinations rather than applying a uniform standard to all combinations. This allows optimal performance for each band combination while maintaining manageable overall system complexity through preconfiguration.
Data Source
AI summary
One general aspect of the present disclosure includes a device configured to perform communication. The device including: at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising: transmitting an uplink signal via two bands among a plurality of E-UTRA operating bands; and receiving a downlink signal via three bands among the plurality of E-UTRA operating bands, wherein pre-configured MSD value is applied to a reference sensitivity for receiving the downlink signal based on the E-UTRA operating band 66.