Beam-Based Sidelink Resource Management for Full-Duplex Interference Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in 5G New Radio (NR) systems, face challenges in supporting full duplex (FD) sidelink communications due to interference and inefficient resource utilization when UEs reserve resources for subsequent communications, leading to spectral inefficiency and poor resource utilization.
Innovation Solution
A method where a first UE determines receive and transmit beam directions based on sidelink control information from a second UE, allowing concurrent reception and transmission using reserved resources while minimizing interference by selecting beam directions that are different from or adjacent to the receive beam directions of the second UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UEs reserve resources for subsequent communications in existing wireless systems, then resource allocation is simplified, but interference increases and spectral efficiency deteriorates
Solution Approach 1:
The patent introduces spatial dimension (beam direction) as a new resource dimension for sidelink communications. By selecting transmit beam directions that are different from or adjacent to receive beam directions, the system utilizes spatial separation to enable full duplex operations without increasing temporal or frequency resource conflicts, thereby reducing interference while maintaining resource allocation simplicity
Solution Approach 2:
The patent applies local quality by allowing different beam directions to be used for different spatial locations or communication pairs. Each UE can independently select its transmit and receive beam directions based on local spatial characteristics, enabling interference-free full duplex communications in specific spatial regions while other regions continue normal operations
2Productivity
If UEs use reserved resources for concurrent transmission and reception, then resource utilization improves, but interference increases leading to poor spectral efficiency
Solution Approach 1:
The patent enables concurrent transmission and reception by introducing spatial dimension (beam direction) as an additional resource dimension. UEs can occupy the same time-frequency resources for both transmission and reception by selecting appropriate beam directions that are different from or adjacent to each other, thereby achieving full duplex operation with improved resource utilization while avoiding self-interference through spatial separation
3Productivity
If beam directions are selected to minimize interference in full duplex mode, then spectral efficiency improves, but system complexity increases
Solution Approach 1:
The patent changes the beam direction parameter selection criteria to achieve full duplex operation. By selecting transmit beam directions that are different from or adjacent to receive beam directions, the system modifies the spatial parameter to enable simultaneous transmission and reception. This parameter-based approach simplifies beam management compared to complex interference coordination protocols while improving spectral efficiency
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may receive, from a second UE, sidelink control information for performing full-duplex communications with the second UE. The sidelink control information may include an indication of resources reserved by the second UE, an indication of one or more transmit beam directions associated with the resources reserved by the second UE, or both. The first UE may receive, via the resources reserved by the second UE, a first message using a first receive beam based on the sidelink control information. The first UE may transmit, via the resources reserved by the second UE, a second message using a first transmit beam of the first UE, a direction of the first transmit beam being different from a direction of the first receive beam.