UWB Coexistence Mechanisms for Interference-Aware Wireless Nodes
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Solution Overview
Problem
There is interference between ultra-wideband (UWB) and non-UWB wireless technologies, such as cellular and radio local access networks (RLAN), which affects the performance of UWB operations.
Innovation Solution
Non-UWB network nodes are made aware of UWB transmissions and apply interference mitigation techniques, including transmitting in non-overlapping frequency bands, adaptive beam suppression, power reduction, or ceasing transmissions in overlapping bands to protect UWB ranging sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-UWB network nodes transmit in frequency bands overlapping with UWB ranging sessions, then the non-UWB network node achieves frequency utilization and communication coverage, but UWB ranging performance deteriorates due to interference
Solution Approach 1:
The non-UWB network node receives beacon signals from UWB infrastructure access points before conducting transmissions, allowing it to identify UWB frequency ranges and take preliminary interference mitigation actions (such as selecting non-overlapping frequencies or applying beam suppression) before actual transmission occurs, thereby preventing UWB ranging interference
Solution Approach 2:
The interference mitigation is applied locally and selectively rather than globally. The non-UWB network node identifies specific frequency ranges or spatial directions where UWB operations occur and applies mitigation measures (such as beam suppression or power reduction) only in those specific locations, while maintaining normal transmissions in other frequency bands or directions
2Reliability
If non-UWB network nodes apply interference mitigation measures such as beam suppression or power reduction, then UWB ranging session protection is improved, but non-UWB transmission efficiency deteriorates
Solution Approach 1:
Interference mitigation measures are applied selectively only in the specific frequency ranges or spatial directions where UWB beacon signals are detected, rather than across the entire frequency band. This allows the non-UWB network node to protect UWB ranging sessions while maintaining normal transmission efficiency in other frequency bands or directions
Solution Approach 2:
The non-UWB network node applies partial interference mitigation by using techniques such as beam suppression or power reduction only to the extent necessary to protect UWB operations, rather than completely ceasing transmissions. This partial action is sufficient to mitigate interference while preserving overall transmission efficiency
Data Source
AI summary
Disclosed are techniques for wireless communication. In some aspects, a user equipment (UE) receives one or more beacon signals from one or more ultra-wideband (UWB) infrastructure access points and transmits, to one or more non-UWB network nodes, an interference mitigation message based on reception of the one or more beacon signals. In some aspects, a non-UWB network node receives, from a UE, an interference mitigation message for a UWB ranging session involving the UE, and performs one or more interference mitigation measures to protect the UWB ranging session