RIS Link Identification via Unique Signatures
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Solution Overview
Problem
Existing wireless communication systems face challenges in differentiating between direct and indirect communication links involving reconfigurable intelligent surfaces (RIS), leading to reduced communication performance and efficiency due to the inability to separately maintain and manage these links effectively.
Innovation Solution
Implementing techniques for RIS link identification by associating unique signatures or sequences with RIS, allowing transmitters and receivers to distinguish between direct and indirect links through time and frequency domain resource manipulation, enabling separate management and improving communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RIS link identification is implemented using unique signatures and sequences, then communication performance and efficiency are improved, but device complexity increases
Solution Approach 1:
The patent segments the communication link identification process by assigning unique signatures and sequences to different RIS links. Each RIS link is identified through distinct time-domain and frequency-domain resources, allowing the system to differentiate between multiple RIS links independently. This segmentation enables separate management of direct and indirect links while maintaining manageable complexity through structured identification protocols.
2Reliability
If separate management of direct and indirect links is enabled through RIS link identification, then communication performance improves, but beam management and power allocation complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where RIS elements transmit identification information (signatures and sequences) back to the receiver. This feedback allows the receiver to identify which RIS link is being used and adjust beam management and power allocation accordingly. The feedback loop enables adaptive beamforming and power control for each RIS link independently, improving communication performance while managing complexity through automated adjustments.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiver may receive, from a transmitter, an indication of a signature of a reconfigurable intelligent surface (RIS). The receiver may receive a signal that is transmitted by the transmitter and redirected by the RIS. The receiver may receive, from the RIS, a sequence associated with the signature of the RIS indicating that the signal is transmitted using a link associated with the RIS. Numerous other aspects are described.