V2X Communication Resource Mapping for Latency Reduction
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Solution Overview
Problem
Current LTE V2X sidelink communication struggles with ultra-low latency requirements due to fixed subcarrier spacing and limited transmission time intervals, while New Radio (NR) supports multiple communication resource parameters but lacks efficient mapping for diverse V2X services.
Innovation Solution
A method and apparatus that determine communication resources based on a mapping between V2X services and communication resource parameters, such as subcarrier spacing, time lengths, and bandwidth parts, to meet the specific requirements of different V2X services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If fixed subcarrier spacing of 15k is used in LTE V2X sidelink communication, then system simplicity is maintained, but transmission latency cannot be reduced for ultra-low latency services
Solution Approach 1:
The patent introduces dynamic subcarrier spacing configuration where the SCS can be changed based on service requirements. The network device can configure different SCS values (e.g., 15k, 30k, 60k) for different V2X services, allowing the system to adapt from fixed to dynamic parameters. This enables ultra-low latency services to use larger SCS values while maintaining backward compatibility with existing services.
Solution Approach 2:
The patent changes the subcarrier spacing parameter from a fixed value (15k in LTE) to multiple configurable values (15k, 30k, 60k in NR). By introducing parameter variability, the system can optimize transmission latency for different service types. The mapping between service types and SCS parameters allows automatic selection of appropriate parameters based on service requirements.
2Adaptability or versatility
If multiple communication resource parameters are introduced in NR V2X, then service diversity support is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal mapping mechanism that works across different service types (V2V, V2I, V2P) and different parameter configurations. The mapping relationship between service types and communication resource parameters provides a unified framework that simplifies configuration management. This universal approach allows the same mechanism to handle diverse services without requiring service-specific complex configuration procedures.
Solution Approach 2:
The patent enables terminal devices to automatically determine appropriate communication resource parameters based on the mapping relationships. Instead of requiring complex manual configuration, the system allows terminals to self-select parameters (such as SCS, time length, BWP) based on service type identification and pre-configured mappings, reducing configuration complexity while maintaining adaptability.
3Reliability
If subframe-based TTI of 1ms is used in LTE V2X, then backward compatibility is maintained, but ultra-low latency requirements cannot be met
Solution Approach 1:
The patent transitions from static subframe-based TTI (fixed at 1ms in LTE) to dynamic TTI configurations in NR. The system can dynamically adjust TTI length based on service requirements, supporting both traditional subframe-based transmission for backward compatibility and shorter TTI for ultra-low latency services. This dynamic capability allows the system to adapt TTI duration to match different service priorities.
4Ease of manufacture
If single SCS is used per carrier in LTE, then implementation simplicity is maintained, but diverse service requirements cannot be satisfied
Solution Approach 1:
The patent applies local quality by allowing different subcarrier spacing values within different parts of the carrier bandwidth. Instead of using a single SCS for the entire carrier, the system can configure different SCS values for different frequency regions or bandwidth parts (BWPs). This enables optimized parameter selection for different service types operating on the same carrier while maintaining overall system simplicity through structured configuration management.
Data Source
AI summary
A communication method and apparatus and a communication system, the communication apparatus being provided in a terminal equipment, and the communication apparatus comprising: processing circuitry configured to acquire or select communication resources determined based on a mapping between vehicle-to-everything (V2X) services and communication resource parameters; and communication circuitry configured to transmit target V2X services by using the communication resources. The communication resources may be determined according to the mapping between vehicle-to-everything (V2X) services and communication resource parameters. Certain embodiments making the communication resources meet requirements of the V2X services.