Sidelink Beam Selection During Unicast Link Establishment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sidelink communication systems using millimeter-wave frequency bands, the beam selection process for transmit and receive beams is not adequately considered during unicast link establishment, leading to unsuccessful sidelink transmissions due to unknown beam configurations.
Innovation Solution
Simultaneously transmit first information associated with a direct communication request (DCR) along with channel state information reference signals (CSI-RS) and CSI-RS resource indication information to facilitate beam selection during sidelink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam-based transmission is adopted to improve transmission rate in millimeter-wave sidelink communication, then transmission rate is improved, but device complexity increases due to the need for beam selection process
Solution Approach 1:
The patent merges the unicast link establishment process with the beam selection process by transmitting DCR information and CSI-RS resources simultaneously through the same physical channel (PSSCH). This integration allows both link establishment and beam selection to be completed in one operation, resolving the contradiction by eliminating the need for separate beam selection procedures while maintaining millimeter-wave transmission capabilities
Solution Approach 2:
The patent performs beam selection in advance during the unicast link establishment phase by pre-configuring CSI-RS resources and transmitting them together with DCR information. This preliminary beam selection ensures that the appropriate transmit and receive beams are identified before actual data transmission begins, allowing high-rate millimeter-wave communication without adding complexity to the subsequent transmission process
2Ease of operation
If beam selection process is not included in conventional unicast link establishment, then ease of operation is improved, but reliability deteriorates due to inability to perform sidelink transmission
Solution Approach 1:
The patent combines unicast link establishment and beam selection into a single integrated process where DCR information and CSI-RS resources are transmitted together. This merging maintains the simplicity of conventional unicast establishment while ensuring reliable sidelink transmission by embedding beam configuration information within the same signaling framework
Solution Approach 2:
The patent performs preliminary beam selection during unicast link establishment by configuring and transmitting CSI-RS resources alongside DCR information. This ensures that beam configurations are determined in advance, guaranteeing reliable sidelink transmission without requiring additional separate beam selection procedures
3Ease of operation
If beam selection is performed separately after unicast link establishment, then ease of operation is maintained, but loss of time increases due to additional transmission delays
Solution Approach 1:
The patent merges unicast link establishment and beam selection into a single simultaneous operation by transmitting DCR information and CSI-RS resources through the same physical channel. This eliminates the sequential execution of separate procedures, thereby removing transmission delays associated with post-establishment beam selection while maintaining operational simplicity
Solution Approach 2:
The patent performs beam selection in advance during the unicast link establishment phase by pre-configuring and transmitting CSI-RS resources together with DCR information. This preliminary action ensures that beam configurations are ready before data transmission begins, eliminating delays that would otherwise occur if beam selection were performed separately after link establishment
Data Source
AI summary
A method for sidelink transmission includes: transmitting, by a first terminal device, first information to a second terminal device, where the first information is associated with a first direct communication request (DCR), and the first information is transmitted simultaneously with one or more of: a first channel state information reference signal (CSI-RS); and first CSI-RS resource indication information.