Long-term sensing for inter-operator coexistence in unlicensed high frequency bands
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Solution Overview
Problem
In wireless communication systems, especially in unlicensed high frequency bands, interference between non-coordinating nodes is a significant issue due to the high directionality and short range of transmissions, leading to severe beam collisions and degraded channel conditions, which existing coexistence techniques struggle to effectively mitigate.
Innovation Solution
The implementation of long-term-sensing-based inter-operator coexistence techniques, where user equipment (UE) and network entities use long-term-sensing measurements to identify affected non-coordinating nodes and transmit remedial actions, such as channel selection or dynamic frequency selection, to mitigate interference and adjust communication channels accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If beamforming is used to transmit directional communications in unlicensed high frequency bands, then communication directionality and range are improved, but interference and beam collisions between multiple nodes increase
Solution Approach 1:
The system performs long-term sensing measurements before actual communication to identify potential interfering nodes and their beam patterns. This preliminary detection allows the network to proactively configure communication parameters that avoid future interference, rather than reacting after beam collisions occur.
Solution Approach 2:
The system continuously monitors the radio frequency environment and feeds back interference information to the network entity. Based on this feedback, the network dynamically adjusts beamforming configurations, frequency selections, and power levels to maintain directional communication while avoiding harmful interference with other nodes.
2Quantity of substance
If multiple nodes utilize beamforming in unlicensed high frequency bands, then communication capacity is improved, but interference severity increases due to beam collisions
Solution Approach 1:
The system segments the frequency spectrum into different channels and assigns them to different nodes based on long-term sensing measurements. This segmentation allows multiple nodes to operate simultaneously in the same geographic area with beamforming, increasing overall communication capacity while preventing interference through frequency separation.
Solution Approach 2:
The system transitions from spatial-only interference management to a multi-dimensional approach by incorporating frequency dimension. Through dynamic frequency selection based on long-term sensing, the system can maintain multiple simultaneous beamforming transmissions by separating them in the frequency domain, thus increasing capacity while managing interference severity.
3Reliability
If long-term-sensing-based measurements are implemented to identify non-coordinating nodes, then interference mitigation capability is improved, but system complexity increases
Solution Approach 1:
User equipment performs long-term sensing measurements autonomously to detect non-coordinating nodes and report findings to the network. This self-service approach distributes the sensing burden across multiple UEs rather than requiring complex centralized sensing infrastructure, thereby improving interference mitigation while limiting the increase in overall system complexity.
Solution Approach 2:
The long-term sensing mechanism serves multiple functions: it identifies non-coordinating nodes, characterizes their beam patterns, measures interference levels, and provides data for frequency selection. This multi-functionality consolidates what could be separate complex subsystems into a single versatile sensing framework, improving reliability without proportionally increasing complexity.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, related to long-term-sensing-based inter-operator coexistence techniques for unlicensed high bands providing a measurement framework and candidate measurements, along with channel selection, per beam channel deselection, and dynamic frequency selection. In one aspect, a network entity may determine that a non-coordinating node satisfies a communication presence threshold based on the at least one long term sensing measurement, and transmitting, to a user equipment (UE), an indication of a remedial action, or adjusting the communication channel based on the determination. In another aspect, a UE may obtain at least one long term sensing measurement, and transmit a long term sensing report including the at least one long term sensing measurement.