Terminal Device Communication with AIOT Interference Cancellation
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Solution Overview
Problem
Existing communication systems face challenges in efficiently reading ambient Internet of Things (AIOT) devices due to their energy harvesting nature, mobility, and interference issues, making traditional NR UE paging operations ineffective.
Innovation Solution
A method and apparatus that utilize transient propagation similarity information, such as quasi co-location (QCL) information, to estimate and modify channel responses, enabling the isolation of AIOT device responses from activation signals by leveraging ordered lists of reference signals and filter functions to suppress activator-to-tag interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional NR UE paging operations are used for AIOT devices, then the communication system can maintain standard compatibility, but the reading accuracy deteriorates due to activator-to-tag interference and device mobility
Solution Approach 1:
The patent extracts and removes the harmful activator-to-tag interference component from the received signal. The receiving node isolates the interference contribution generated by the activation signal and subtracts it from the total received signal, thereby extracting the pure AIOT device response for accurate detection
Solution Approach 2:
The patent performs preliminary channel estimation using reference signals transmitted before the activation signal. By estimating the channel response in advance and predicting the interference contribution before receiving the actual response signal, the system prepares the interference cancellation parameters needed for accurate signal separation
2Measurement precision
If reference signals are transmitted for channel estimation, then the channel information accuracy improves, but the system complexity increases due to additional signaling overhead
Solution Approach 1:
The patent makes the reference signals serve multiple functions: they are used for both standard channel estimation purposes and for predicting the activator-to-tag interference contribution. This multi-functionality allows the system to obtain both channel state information and interference prediction data from the same reference signal transmissions, reducing overall signaling overhead
3Adaptability or versatility
If the system accounts for device mobility and energy harvesting nature of AIOT devices, then the adaptability improves, but the ease of operation deteriorates due to ineffective traditional paging operations
Solution Approach 1:
The patent implements dynamic interference cancellation that adapts to changing channel conditions caused by device mobility. The system continuously updates channel estimates using reference signals and recalculates the interference prediction based on current channel state, allowing the communication system to dynamically adjust to mobile AIOT devices while maintaining operational simplicity through automated processes
Data Source
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AI summary
A method, apparatus and computer program is described comprising: receiving configuration information from a network node of a mobile communication system, the configuration information identifying a transmitting node and a receiving node for communication with a terminal device, wherein the configuration information further comprises transient propagation similarity information providing an ordered list of reference signals for transmission from the transmitting node to the receiving node; receiving one or more reference signals from the transmitting node; receiving an activation signal transmitted by the transmitting node to the terminal device; receiving a response signal, wherein the response signal includes a response generated at the terminal device in response to the activation signal transmitted by the transmitting node to the terminal device; and removing, based on an updated estimated channel response between the transmitting node and the receiving node at a time of transmitting the activation signal by the transmitting node to a terminal device an estimated contribution of the activation signal transmitted by the transmitting node to the terminal device from the response signal.