Uplink Sidelink Resource Sharing via Beam Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink and sidelink resources, particularly in scenarios like vehicle-to-everything (V2X) communications, where interference between uplink and sidelink signals can hinder network resource utilization and reliability.
Innovation Solution
The proposed method leverages channel reciprocity in a time division duplex (TDD) system to reduce interference by using beam coordination, where terminals share time/frequency resources while spatially dividing their communication using distributed antennas, allowing for efficient allocation and use of resources without requiring constant BS coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink and sidelink resources are shared in time/frequency domain, then network resource efficiency is improved, but interference between uplink and sidelink signals increases
Solution Approach 1:
The patent segments the shared time/frequency resources into different spatial domains using beamforming. By dividing the communication space into distinct beam directions, uplink and sidelink transmissions can occur simultaneously on the same resources without interfering with each other, thus maintaining high resource efficiency while eliminating interference.
Solution Approach 2:
The patent introduces a spatial dimension (beam direction) to differentiate between uplink and sidelink transmissions. Instead of separating resources in time or frequency domains, the system uses spatial beamforming to create orthogonal communication channels, allowing resource sharing while preventing interference through spatial isolation.
2Object-generated harmful factors
If beam coordination is used for spatial division, then interference is reduced, but device complexity increases
Solution Approach 1:
The patent implements self-service beam coordination where terminals autonomously select beams based on pre-configured beam patterns and channel quality indicators, without requiring complex real-time coordination with the base station. This reduces device complexity while maintaining effective spatial separation and interference reduction.
Solution Approach 2:
The system performs preliminary beam configuration and spatial relationship setup in advance, so that when uplink and sidelink transmissions occur, the beams are already optimized and coordinated. This preliminary action simplifies the real-time operation and reduces the computational complexity during actual communication.
3Productivity
If distributed antennas are used for spatial division, then resource sharing efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of multiple distributed antennas into a unified beamforming system. By combining the antenna elements and coordinating their signals through digital signal processing, the system achieves spatial division and interference reduction while presenting a simplified interface to higher layers, thus improving resource efficiency without proportionally increasing complexity.
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
This approach enhances network resource efficiency by minimizing interference between uplink and sidelink signals, enabling reliable and efficient communication in V2X scenarios, particularly in high-density vehicle environments, and reduces the complexity of resource management for base stations.
Implementation Method 1
since a characteristic of channel reciprocity in a time division duplex (TDD) system can be used
Data Source
AI summary
Provided are a method and a device for performing device-to-device communication by sharing an uplink resource and a sidelink resource in a wireless communication system. Particularly, a first terminal receives, from a base station, beam scanning signals and a first threshold value. The first terminal generates first reception beam information including beam information of a signal received at a signal intensity greater than or equal to the first threshold value, among the beam scanning signals. The first terminal receives second reception beam information from the base station. The second reception beam information includes beam information of a first uplink signal received by the base station from a second terminal. The first terminal transmits a sidelink signal through the sidelink resource by using a beam obtained by excluding a third reception beam from a first reception beam. The third reception beam is a beam of the first terminal for receiving a signal transmitted using a transmission beam of the base station in the same direction as a second reception beam. The sidelink resource is overlapped with the uplink resource in time and frequency domains.