IoV Terminal Selective Resource Pool Sensing for Delay Reduction
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Solution Overview
Problem
In Internet of Vehicles systems, vehicle terminals experience excessive data transmission delays due to sensing resource pools with long transmission time intervals (TTIs), which negatively impacts user experience.
Innovation Solution
A sensing method where terminal devices selectively sense resource pools with both short and long TTIs, generating indication information in the media access control layer to instruct the physical layer to acquire available transmission resources, thereby reducing data transmission delays and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a terminal device senses only resource pools with long TTI (e.g., 1 ms), then the sensing process is simple, but the data transmission delay becomes excessively long
Solution Approach 1:
The patent segments the resource pool sensing into multiple types based on TTI duration. The terminal device separately senses short TTI resource pools and long TTI resource pools, and selectively uses short TTI resources for delay-sensitive data transmissions. This segmentation allows the system to reduce transmission delays for urgent data without requiring complete redesign of the sensing mechanism.
Solution Approach 2:
The patent introduces dynamic resource pool sensing where the terminal device can adaptively select between sensing short TTI and long TTI resource pools based on service requirements. For delay-sensitive services, the terminal dynamically senses and selects short TTI resources; for non-delay-sensitive services, it uses long TTI resources. This dynamic approach optimizes both delay performance and sensing complexity.
2Productivity
If a terminal device uses only long TTI resources for transmission, then resource availability is sufficient, but data transmission efficiency is low
Solution Approach 1:
The patent applies local quality by assigning different TTI characteristics to different resource pools based on service requirements. Short TTI resource pools are optimized for delay-sensitive applications with higher transmission efficiency, while long TTI resource pools serve other applications. This localized optimization of resource properties improves overall system productivity.
Solution Approach 2:
The patent changes the TTI parameter from a fixed long duration to a variable duration that can be selected based on service requirements. By introducing short TTI as an alternative parameter value, the system achieves higher transmission efficiency for time-critical data while maintaining compatibility with existing long TTI resources for other purposes.
3Adaptability or versatility
If a terminal device senses multiple resource pools with different TTIs, then resource matching for delay requirements improves, but the sensing and resource selection complexity increases
Solution Approach 1:
The patent implements preliminary action by having the network pre-configure multiple resource pools with different TTI characteristics before terminal devices need to transmit data. The terminal devices can directly use these pre-prepared resource pools without performing complex real-time analysis, thereby improving resource matching capability while limiting the increase in sensing and selection complexity.
Data Source
AI summary
Provided are a monitoring method and terminal apparatus in an Internet-of-Vehicles system. The method comprises: a terminal apparatus generating instruction information on a media access control layer, the instruction information being configured to instruct the terminal apparatus to monitor, on a physical layer, at least one resource pool of one transmission duration; and the terminal apparatus sending to the physical layer the instruction information. In embodiments of the present invention, the terminal apparatus effectively improves a data transmission rate by means of selectively monitoring a resource pool (e.g., a resource pool of 1-ms TTI and a resource pool of a 0.5-ms TTI), thus reducing data transmission delay, and accordingly improving user experience.