EN-DC UE Band Combination MSD for Harmonic and IMD Interference
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Solution Overview
Problem
The impact of harmonics and/or IMD on some E-UTRA NR Dual Connectivity (EN-DC) band combinations has not been analyzed, and Maximum Sensitivity Degradation (MSD) values have not been discussed in conventional systems.
Innovation Solution
The analysis and determination of MSD in EN-DC band combinations, particularly for power class 3 UEs, to address self-interference issues due to harmonics and IMD, with proposed relaxed standards for sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If EN-DC band combinations are used to enable dual connectivity operations, then communication flexibility and coverage are improved, but self-interference from harmonics and IMD causes sensitivity degradation
Solution Approach 1:
The patent applies preliminary action by pre-determining MSD values for specific EN-DC band combinations before actual communication operations. The network entity configures the UE with appropriate uplink bands and MSD values in advance, allowing the UE to compensate for anticipated self-interference effects during downlink reception, thereby maintaining sensitivity requirements despite the presence of harmonics and IMD.
2Productivity
If multiple uplink bands are configured for dual connectivity, then uplink communication capability is improved, but sensitivity degradation occurs during downlink reception due to self-interference
Solution Approach 1:
The patent applies parameter changes by introducing MSD (Maximum Sensitivity Degradation) values as a compensatory parameter. When multiple uplink bands are configured for dual connectivity, the network entity determines appropriate MSD values based on the specific band combination and configures them to the UE. These MSD values adjust the sensitivity requirements, allowing the system to maintain acceptable downlink reception performance despite self-interference from multiple uplink transmissions.
3Reliability
If relaxed sensitivity standards are applied based on MSD, then UE sensitivity requirements are met, but communication performance may be compromised
Solution Approach 1:
The patent applies feedback by establishing a closed-loop configuration process where the network entity determines MSD values based on the specific EN-DC band combination and communication scenario, then configures these values to the UE. The UE uses the configured MSD values to adjust its reception sensitivity requirements appropriately. This feedback mechanism ensures that relaxed sensitivity standards are applied only when and where necessary, maintaining communication performance while ensuring sensitivity requirement compliance.
Data Source
AI summary
There is provided a UE in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; and at least one computer memory operably connectable 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 one NR operating band among NR operating band n1, n7, n8, n28, n40, or n78 and one E-UTRA operating band among E-UTRA operating band 1, 3, or 7; and receiving a downlink signal based on two NR operating bands among the NR operating band n1, n7, n8, n28, n40, or n78 and the one E-UTRA operating band.