Vehicle RIS Control Using Tracking Periods for Interference Mitigation
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Solution Overview
Problem
Wireless communications in vehicular environments suffer from outside-to-inside penetration losses, blocking, and interference, leading to unreliable signal transmission and reception.
Innovation Solution
Implementing configurable intelligent surfaces (RISs) on vehicles, controlled by a vehicular UE (V-UE) to manage signal reflection and boosting based on measurement reports and sensor information, using tracking and data periods to enhance communication with network entities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If configurable intelligent surfaces (RISs) are implemented on vehicles to manage signal reflection and boosting, then signal strength and communication reliability are improved, but device complexity and control difficulty increase
Solution Approach 1:
The patent introduces a network entity as an intermediary to manage and control the RIS configurations. The network entity receives measurement reports from the V-UE, determines appropriate RIS configurations, and provides control signals to the RIS. This intermediary approach allows the complex RIS control functionality to be managed centrally rather than requiring complex local processing in the V-UE, thus improving communication reliability while managing device complexity through distributed control architecture.
Solution Approach 2:
The patent implements a feedback mechanism where the V-UE transmits measurement reports to the network entity regarding signal conditions and RIS performance. The network entity uses this feedback information to dynamically adjust and optimize RIS configurations. This closed-loop feedback system enables the system to adapt to changing communication conditions, improving reliability while keeping the control logic manageable through iterative optimization rather than requiring overly complex predictive control.
2Object-affected harmful factors
If RIS configurations are dynamically adjusted based on measurement reports, then interference is mitigated and signal quality improves, but processing time and control overhead increase
Solution Approach 1:
The patent employs tracking periods during which the V-UE performs measurements and reports to the network entity before actual data transmission occurs. The network entity uses this advance information to pre-determine and configure appropriate RIS settings. By performing these configuration actions in advance during tracking periods, the system can mitigate interference and improve signal quality for subsequent data periods without incurring processing delays during critical data transmission windows.
Solution Approach 2:
The patent implements a periodic structure with alternating tracking periods and data periods. During tracking periods, measurements are taken and RIS configurations are updated based on current conditions. During data periods, the configured RIS settings are applied for actual communication. This periodic alternation allows the system to balance the time required for measurement, processing, and configuration updates against the time required for data transmission, ensuring interference mitigation is achieved without excessive processing time impacting overall system throughput.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances signal strength and mitigates interference for UEs inside vehicles by dynamically adjusting RIS configurations, supporting reliable communication.
Implementation Method 1
Implementing configurable intelligent surfaces (RISs) on vehicles, controlled by a vehicular UE (V-UE) to manage signal reflection and boosting
Data Source
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Figure 3A~3B
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques support communication between one or more network entities and user equipment (UEs) via configurable intelligent surfaces. A first UE may transmit, to a second UE associated with a set of configurable intelligent surfaces, first information that indicates a tracking period and a data period that the second UE is to use to manage the configurable intelligent surfaces. The second UE may adjust the configurable intelligent surfaces for the communications between the first UE and network entities during the tracking period and the data period. The second UE may adjust the configurable intelligent surfaces based on measurement reports generated by the first UE based on communication during the tracking and data periods.