V2X Carrier Selection for Leakage Interference Reduction
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Solution Overview
Problem
In wireless communication systems, particularly in V2X operations, there is a challenge in reducing leakage interference on carriers providing high-priority services when performing V2X operations adjacent to carriers using the same frequency band, such as IEEE 802.11P-based DSRC, which can cause collisions and interference.
Innovation Solution
A method for V2X operation in wireless communication systems involves configuring and selecting carriers to minimize leakage interference by setting maximum allowable transmit power and selecting carriers with greater frequency separation or lower CBR values, ensuring that V2X signals are transmitted within pre-configured limits to protect high-priority services on adjacent carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If V2X operation is performed on a carrier adjacent to a carrier providing high-priority service, then V2X communication capability is improved, but leakage interference on the high-priority carrier increases
Solution Approach 1:
The patent changes transmission power parameters dynamically based on carrier selection. When an adjacent carrier is selected for V2X operation, the transmit power is reduced to a pre-configured maximum allowable level to minimize leakage interference on the high-priority carrier, while still enabling V2X communication functionality.
Solution Approach 2:
The system dynamically selects carriers and adjusts transmission parameters based on real-time conditions. The UE determines whether to use the high-priority carrier or an adjacent carrier for V2X operation, and dynamically adjusts transmit power levels accordingly, making the system adaptable to different operational scenarios.
2Reliability
If transmit power is increased to improve V2X signal quality, then communication reliability is improved, but interference to adjacent carriers increases
Solution Approach 1:
The patent implements parameter changes by setting a maximum allowable transmit power level that is lower than the UE's maximum capability when operating on an adjacent carrier. This power parameter is adjusted based on the selected carrier type and pre-configured values, ensuring sufficient signal quality for V2X while limiting interference to adjacent carriers.
3Object-generated harmful factors
If carrier frequency separation is increased to reduce interference, then interference reduction is improved, but available carrier options decrease
Solution Approach 1:
The system dynamically evaluates available carriers and selects the most appropriate one for V2X operation. When the high-priority carrier is selected, full power is used; when an adjacent carrier is selected, reduced power is used. This dynamic approach allows the system to use carriers with varying frequency separations while managing interference through power control.
Data Source
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AI summary
Provided is a method for a terminal operating vehicle to everything (V2X) in a wireless communication system. The method comprises: receiving, from a network, a setting indicating a specific carrier transmitting or receiving a first service; selecting a carrier from among carriers within a specific range in a frequency area based on the specific carrier indicated by the setting; and transmitting a V2X signal from the selected carrier, wherein the first service has a higher priority than a second service relating to the V2X signal.