UE IDC Reporting for NTN-GNSS Coexistence
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Solution Overview
Problem
Wireless communication systems face challenges in coexistence of multiple wireless technologies on user equipment (UE) due to interference between different wireless communication bands, particularly in non-terrestrial networks (NTNs) where bands like L-band and GNSS frequencies overlap, leading to reduced data throughput and GNSS location accuracy.
Innovation Solution
The UE reports assistance information to the network entity regarding requested time windows and communication configurations, allowing the network to schedule communications to minimize interference by configuring the UE to refrain from transmitting during specific periods allocated for other wireless technologies, such as GNSS receive windows, thereby reducing overlap and enhancing coexistence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits continuously on NTN bands, then data throughput is improved, but interference with GNSS reception increases
Solution Approach 1:
The network entity configures the UE with periodic time windows (e.g., every 10 seconds) during which the UE refrains from transmitting on NTN bands to allow GNSS reception. This periodic scheduling creates regular interference-free intervals while maintaining overall communication productivity through structured transmission patterns outside these windows.
Solution Approach 2:
The communication timeline is segmented into distinct time windows: GNSS receive windows where transmission is prohibited, and NTN communication windows where transmission is permitted. This temporal segmentation separates conflicting operations, allowing both GNSS reception and NTN data transmission to coexist without mutual interference.
2Measurement precision
If the UE refrains from transmitting during GNSS receive windows, then GNSS location accuracy is improved, but data throughput decreases
Solution Approach 1:
The network entity dynamically adjusts the timing, duration, and frequency of GNSS receive windows based on operational requirements. The configuration allows flexible adaptation where the UE can be granted longer or more frequent transmission windows when GNSS accuracy requirements are lower, and stricter transmission restrictions when high-precision location is critical, thereby optimizing the trade-off dynamically.
Solution Approach 2:
The system modifies transmission parameters (time windows, periodicity, duration) to balance GNSS reception quality and data throughput. By changing these parameters based on network conditions and service requirements, the system achieves optimal performance for both location accuracy and communication productivity without permanent sacrifice of either.
3Adaptability or versatility
If multiple wireless technologies operate simultaneously on the UE, then device versatility is improved, but in-device interference increases
Solution Approach 1:
The system implements periodic time-division multiplexing where different wireless technologies (NTN and GNSS) are activated in alternating time windows. This allows the multi-functional device to support both technologies while minimizing mutual interference through structured temporal separation, maintaining versatility without sacrificing performance.
Solution Approach 2:
The network entity acts as an intermediary that coordinates and schedules the operation of multiple wireless technologies on the UE. By receiving assistance information from the UE and providing optimized configurations, the network mediates between conflicting operational requirements, enabling coexistence of multiple technologies with minimal interference.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communications by an apparatus. A method includes sending user equipment (UE) assistance information to a network entity, the UE assistance information comprising information indicative of: a requested length of a requested time window; a requested periodicity at which the requested time window repeats; and a first requested communication configuration for communicating during the requested time window; receiving a communication configuration from the network entity; and communicating according to the communication configuration.