NR Receiver Detecting LTE V2X Transmissions
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Solution Overview
Problem
In wireless telecommunications networks, especially in coexistence scenarios between New Radio (NR) and Long Term Evolution (LTE) V2X devices, there is a challenge in preventing transmission collisions due to shared resources being used by different radio access technologies, which existing technologies struggle to manage efficiently without compromising the operation of either technology.
Innovation Solution
The apparatus and method involve using a first radio access technology receiver to detect whether a transmission other than the first radio access technology is occurring by identifying characteristics such as power spectral density profiles or signal strength, and based on this detection, determining whether to transmit in a second portion of the transmission time interval using a first radio access technology transmitter, thereby avoiding collisions by postponing transmissions when shared resources are in use by other technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If NR and LTE V2X devices share radio resources, then spectrum utilization efficiency is improved, but transmission collisions occur between different radio access technologies
Solution Approach 1:
The NR device performs detection in the first portion of the transmission time interval before transmitting in the second portion. This preliminary detection action allows the device to identify LTE transmissions beforehand and avoid collisions by postponing its own transmission if necessary, thus maintaining reliable operation while enabling resource sharing
Solution Approach 2:
The patent introduces a detection mechanism that acts as an intermediary between NR and LTE transmissions. By monitoring for characteristic patterns of LTE transmissions in the first portion of the time interval, the NR device can mediate its own transmission decisions to avoid conflicts, enabling both technologies to coexist in shared resources
2Reliability
If a device monitors both NR and LTE transmissions simultaneously, then transmission collision prevention is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential detection functionality needed for collision avoidance. Instead of requiring full dual-RAT monitoring capability, the NR device uses its receiver to detect specific characteristic patterns of LTE transmissions (such as power spectral density profiles or signal strength thresholds). This extracted approach maintains reliability while significantly reducing device complexity
Solution Approach 2:
The detection mechanism uses simplified copies or representations of LTE transmission characteristics rather than requiring full LTE protocol stack implementation. By identifying key features such as power spectral density profiles or guard period patterns, the NR device can detect LTE transmissions without the complexity of simultaneous dual-RAT operation
Data Source
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AI summary
An apparatus, comprising: means for detecting, using a first radio access technology receiver, whether a transmission other than a first radio access technology transmission is occurring in a first portion of a transmission time interval by identifying whether a characteristic of a transmission in said first portion of said transmission time interval detected by said first radio access technology receiver is at least one of: matching a characteristic of a second radio access technology transmission, and failing to match a characteristic of said first radio access technology transmission; and further comprising means for determining whether to transmit in a second portion of said transmission time interval using a first radio access technology transmitter based on said detecting by said means for detecting.