RIS Muting Bitmaps for 5G Interference Management
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Solution Overview
Problem
The existing wireless communication systems, particularly in the context of 5G networks, face challenges in optimizing spectral efficiency, reducing latency, and managing interference in heterogeneous networks, especially with the introduction of reconfigurable intelligent surfaces (RIS) that require efficient time and frequency resource management.
Innovation Solution
Implementing a system for time and frequency resource level muting of reconfigurable intelligent surfaces (RIS) to optimize communication efficiency by dynamically controlling the reflection and transmission of signals, thereby enhancing spectral efficiency and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reconfigurable intelligent surfaces are deployed to enhance spectral efficiency and reduce latency in 5G networks, then network performance is improved, but interference management and resource allocation complexity increase
Solution Approach 1:
The patent segments the RIS resource management into time-domain muting patterns and frequency-domain muting patterns. Time-domain muting divides the time resources into active and muted periods, while frequency-domain muting divides frequency resources into active and muted subcarriers. This segmentation allows independent optimization of time and frequency resources, reducing the overall management complexity while maintaining spectral efficiency improvements.
Solution Approach 2:
The patent implements dynamic muting patterns where the RIS can switch between different time-domain muting patterns and frequency-domain muting patterns based on network conditions. The gNB can dynamically configure which muting pattern to use, allowing the system to adapt to changing interference conditions and traffic demands, thereby managing resource allocation complexity dynamically rather than statically.
2Loss of time
If reconfigurable intelligent surfaces are used to optimize signal reflection and transmission, then latency is reduced, but interference management difficulty increases
Solution Approach 1:
The patent converts the potential harmful effect of RIS reflections causing interference into a beneficial feature by implementing controlled muting patterns. Instead of trying to eliminate all RIS reflections, the system strategically mutes specific time and frequency resources where interference would occur, while allowing reflections to proceed in resources where they provide benefit. This transforms the interference problem into an opportunity for selective signal enhancement.
Solution Approach 2:
The patent introduces muting patterns as an intermediary mechanism between the RIS and the wireless channel. The gNB configures muting patterns that act as a mediator to control when and where the RIS should reflect signals, thereby managing interference without directly controlling the physical RIS elements. This intermediary approach simplifies the interference management by providing a structured framework for coordinating RIS behavior with network conditions.
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
The proposed system enhances spectral efficiency and reduces latency by effectively managing interference and resource allocation in 5G networks using RIS, improving overall network performance.
Implementation Method 1
reconfigurable intelligent surfaces (RIS) that require efficient time and frequency resource management
Data Source
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AI summary
Disclosed are techniques for wireless communication. In an aspect, a method of wireless communication performed by a base station (BS) includes obtaining a resource-level muting bitmap for a reconfigurable intelligent surface (RIS), wherein the resource-level muting bitmap identifies sets of time and frequency resources during which the RIS should be enabled to reflect a transmission beam or disabled from reflecting a transmission beam, and requesting the RIS to be enabled or disabled according to the resource-level muting bitmap.