RIS Controller Channel Sensing for 5G Activation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing the activation and deactivation of reconfigurable intelligent surfaces (RIS) in response to active transmissions, which affects channel sensing and transition times in 5G wireless communication networks.
Innovation Solution
A method implemented by a reconfigurable intelligent surface (RIS) controller that performs channel sensing operations to detect active transmissions and transitions the RIS surface from a deactivated to an activated state based on these detections, while also transmitting transition time capabilities to network nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the RIS controller continuously monitors channel activity to enable rapid activation, then the response speed to active transmissions is improved, but the energy consumption increases due to continuous operation
Solution Approach 1:
The RIS controller performs preliminary channel sensing operations during idle periods to detect potential active transmissions before they occur. By proactively monitoring channel conditions and predicting transmission patterns, the controller can prepare the RIS surface for rapid activation without requiring continuous high-power operation, thus achieving fast response while reducing energy consumption.
Solution Approach 2:
Instead of continuous monitoring, the RIS controller implements periodic channel sensing at strategically determined intervals. The controller alternates between active sensing periods and low-power sleep periods, sensing channel activity only when transmissions are likely to occur. This periodic approach maintains adequate response capability while significantly reducing average energy consumption compared to continuous monitoring.
2Loss of time
If the RIS surface transitions quickly from deactivated to activated state, then the latency is reduced, but the transition time capability requirements increase system complexity
Solution Approach 1:
The RIS controller performs preliminary configuration and preparation of the RIS surface during idle or low-activity periods. By pre-configuring beamforming weights, phase shifts, and amplitude settings in advance, the controller reduces the actual transition time required when activation is needed. This preliminary preparation minimizes latency while avoiding the need for complex real-time reconfiguration mechanisms.
Solution Approach 2:
The RIS controller implements self-service mechanisms by autonomously managing its own activation and deactivation based on detected channel conditions. The controller monitors transmission patterns, predicts activation needs, and autonomously transitions the RIS surface states without requiring complex external coordination or control signaling. This self-managed approach reduces latency while simplifying overall system complexity.
Data Source
AI summary
In an aspect, a reconfigurable intelligent surface (RIS) controller may perform one or more channel sensing operations to detect whether there are active transmissions on one or more wireless communications channels from one or more network entities that the RIS controller is configured to assist. The RIS may transition a RIS surface coupled to the RIS controller from a deactivated state to an activated state based on detection of the active transmissions on the one or more wireless communications channels from the one or more network entities that the RIS controller is configured to assist.