Inter-Subscription DL Interference Cancellation for Overlapping REs
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, overlapping downlink (DL) resource elements (REs) for multiple subscriptions can cause interference due to shared scheduling, which current technologies have not effectively addressed.
Innovation Solution
A user equipment (UE) is configured to receive and perform interference cancellation for overlapping DL REs based on scheduling information from multiple subscriptions, utilizing interference cancelation methods to mitigate this interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple subscriptions share downlink resource elements in 5G NR systems, then resource utilization efficiency is improved, but inter-subscription interference increases
Solution Approach 1:
The UE receives and stores DL scheduling information for multiple subscriptions before the actual data transmission. This preliminary acquisition of scheduling information enables the UE to prepare interference cancellation calculations in advance, allowing accurate reconstruction and subtraction of interfering signals from the received signal without waiting until interference occurs.
Solution Approach 2:
The patent converts the harmful inter-subscription interference into a beneficial signal by using the interfering signal's scheduling information to reconstruct and subtract it from the received signal. The interference that would normally degrade communication quality is instead utilized as a known quantity to enable precise cancellation, thereby improving the signal-to-interference ratio.
2Reliability
If DL scheduling information for multiple subscriptions is received and processed, then interference cancelation capability is improved, but UE processing complexity increases
Solution Approach 1:
The patent segments the interference cancellation process into distinct manageable steps: receiving scheduling information for multiple subscriptions, identifying overlapping resource elements, reconstructing interfering signals based on scheduling information, and subtracting these reconstructed signals from the received signal. This segmentation allows complex interference cancellation to be broken down into standard communication processing operations.
Solution Approach 2:
The UE performs interference cancellation autonomously using its own received scheduling information and signal processing capabilities. The UE leverages its existing reception and processing functions to reconstruct and subtract interfering signals, eliminating the need for external interference cancellation systems or complex additional hardware while maintaining reliable interference removal.
Data Source
AI summary
A UE may be configured to receive a first DL scheduling information of a first set of REs for a first subscription and a second DL scheduling information of a second set of REs for a second subscription, at least a part of the first set of REs overlapping with the second set of REs, the first subscription and the second subscription being included in a plurality of subscriptions between the UE and a network, and perform an interference cancelation for the first set of REs based at least in part on the second DL scheduling information.