Sidelink SSB Selection and HARQ Timing for mmWave V2X
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing synchronization and resource allocation, particularly in mmWave sidelink environments, leading to issues such as time misalignment and resource negotiation delays in vehicle-to-everything (V2X) communication.
Innovation Solution
A method for selecting synchronization signal blocks (SSBs) based on priority and calculating time difference values for hybrid automatic repeat request (HARQ) feedback messages, allowing for efficient resource allocation and timing synchronization in mmWave sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminals receive multiple synchronization signal blocks (SSBs) in mmWave sidelink communication, then synchronization accuracy is improved, but time misalignment and resource negotiation delays occur due to lack of efficient resource allocation mechanisms
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource pools for SSB transmission and HARQ feedback, and by pre-determining timing relationships between SSB reception and feedback transmission. Terminals autonomously select resources from pre-defined pools without requiring real-time negotiation, thereby maintaining high synchronization accuracy while eliminating resource negotiation delays.
2Productivity
If terminals autonomously select resources for HARQ feedback transmission, then resource allocation efficiency is improved, but resource conflicts and collisions may occur without proper coordination
Solution Approach 1:
The patent segments the time-frequency resources into dedicated pools for different purposes: SSB transmission resources, HARQ feedback resources, and data transmission resources. Each pool is further divided into multiple candidate resources with associated timing relationships. This segmentation allows terminals to autonomously select resources without conflicts, as each terminal follows the same segmentation rules and timing relationships, ensuring both high allocation efficiency and reliability.
3Manufacturing precision
If the system uses detailed timing relationships between SSB and HARQ feedback, then transmission timing accuracy is improved, but system complexity increases due to multiple parameters to track
Solution Approach 1:
The patent manages timing complexity by parameterizing the timing relationship through a configurable offset parameter (K) that defines the time difference between SSB reception and HARQ feedback transmission. Instead of tracking multiple independent timing parameters, the system uses this single configurable offset parameter to determine all timing relationships, thereby maintaining high timing accuracy while reducing the complexity of timing management.
Data Source
AI summary
As an example of the present disclosure, a method for operating a terminal in a wireless communication system may be disclosed. The method for operating the terminal may include: receiving, by the terminal, at least one or more synchronization signal blocks (SSBs); selecting an SSB from the at least one or more SSBs based on a priority order; and transmitting a response message including a time difference value. Herein, the time difference value may be calculated based on the selected SSB. The selected SSB may be an SSB with a high priority based on a synchronization source. Transmission timing of the response message may be determined based on the time difference value and the number of received SSBs.