In-Device Coexistence Management for 5G NR-U and WiGig Interference
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Solution Overview
Problem
Current wireless communication technologies face challenges in managing in-device coexistence (IDC) issues, particularly in the 52.6 GHz to 71 GHz frequency range, where interference between WiGig and 60 GHz NR-U transceivers is significant, leading to inefficiencies in frequency utilization and signal interference.
Innovation Solution
The proposed solution involves a communications method and apparatus that enable a UE with multiple transceivers to detect IDC problems and send assistance messages to a network control device (gNB). The gNB then responds with frequency or antenna panel changes to mitigate the IDC issues, thereby enhancing NR IDC mechanisms in the specified frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio transceivers operate on adjacent or sub-harmonic frequencies in the 52.6 GHz to 71 GHz range, then frequency utilization and communication capability are improved, but interference between transceivers (IDC issues) increases
Solution Approach 1:
The patent introduces an intermediary mechanism where the UE detects IDC issues and sends assistance messages to the gNB, which then acts as a mediator to coordinate frequency or antenna panel changes. This intermediary communication path enables the network to manage interference between co-located transceivers operating in the 52.6 GHz to 71 GHz range, resolving the contradiction between frequency utilization and interference avoidance
Solution Approach 2:
The patent implements dynamic adjustment of operating parameters (frequency or antenna panel) based on real-time IDC detection. The system transitions from static frequency assignment to dynamic reconfiguration, where the gNB receives IDC assistance messages and responds with RRC messages to adjust frequencies or antenna panels, thereby adapting to changing interference conditions while maintaining frequency utilization
2Object-affected harmful factors
If frequency or antenna panel changes are implemented to resolve IDC issues, then interference is reduced, but device complexity and control signaling increase
Solution Approach 1:
The patent enables the UE to self-detect IDC issues and autonomously generate assistance messages containing information about the interfering transceiver and victim transceiver. This self-service capability reduces the need for complex network-side detection mechanisms, as the UE performs initial detection and provides the network with structured assistance information, thereby managing interference with controlled signaling overhead
Data Source
AI summary
A network control device, e.g., a gNB, receives a message from a communications device, e.g. a UE, indicating that the communications device is experiencing an in-device coexistence (IDC) problem, e.g. in the 52.6 GHz-71 GHz frequency range with respect to NR-U and WiGig. The message is one of: i) an IDC assistance message indicating that the victim system is Wi-Gig or ii) an antenna panel switch message requesting that the network control device instruct the communications device to change the antenna panel that it uses for uplink NR signaling. The network control device generates and sends a response message to the communications device including: a selected new frequency to be used by the communications device for uplink NR signaling or a selected different antenna panel to be used by the communications device for uplink NR signaling. The communications device implements the change reducing or avoiding the IDC problem.