V2X Terminal Multi-RAT Resource Reconfiguration for Channel Congestion
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Solution Overview
Problem
Current V2X communication systems, such as 4G and 5G cellular communication systems, lack the ability to reconfigure resources for V2X communications when channel congestion occurs, failing to meet reliability and latency requirements for data transmission.
Innovation Solution
A method and apparatus that allow a terminal in a vehicle to switch between different radio access technologies (RATs) by transmitting RRC messages to a base station and an access point, requesting resource allocation based on channel busy ratio thresholds and data importance, enabling V2X communication using heterogeneous RATs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station adjusts transmission parameters based on CBR measurement, then channel congestion is managed, but resource reconfiguration for V2X communication is not supported
Solution Approach 1:
The patent enables dynamic resource reconfiguration for V2X communication by allowing the base station to modify resource pools and transmission parameters in real-time based on CBR measurements and V2X-specific requirements, transforming the static resource allocation into a dynamic adaptive system
Solution Approach 2:
The patent changes multiple transmission parameters including modulation and coding scheme (MCS), maximum transmission power, range of retransmission counts per transport block, and resource pool configurations based on CBR measurement results to optimize V2X communication under varying channel conditions
2Reliability
If the base station uses only transmission parameter adjustment, then simple control is maintained, but reliability and latency requirements for URLLC are not satisfied
Solution Approach 1:
The patent segments resource management into distinct components: resource pool configuration for different V2X services, transmission parameter adjustment, and retransmission control, allowing independent optimization of each aspect to meet specific reliability and latency requirements
Solution Approach 2:
The patent performs preliminary actions by pre-configuring multiple resource pools with different parameters and preparing multiple transmission schemes before V2X communication begins, enabling rapid selection and switching when channel conditions change or URLLC requirements arise
3Adaptability or versatility
If the base station configures resource pools for V2X communication, then V2X service support is enabled, but adaptability to channel congestion conditions is limited
Solution Approach 1:
The patent implements feedback mechanisms where the base station continuously monitors CBR measurements from terminals and dynamically adjusts resource pool configurations and transmission parameters, creating a closed-loop system that adapts to changing channel conditions while maintaining V2X service quality
Data Source
AI summary
An operation method of a terminal in a V2X communication system may include: transmitting, by the terminal, a first radio resource control (RRC) message to a base station supporting a first radio access technology (RAT), the first RRC message including information indicating that the terminal supports multiple RATs including at least a first RAT and a second RAT; receiving, by the terminal, a second RRC message from the base station, the second RRC message including information indicating that multi-RAT based operations are allowed; transmitting, by the terminal, a resource request message for requesting resource allocation for V2X communication to an access point supporting the second RAT when a channel busy ratio (CBR) measurement result is greater than or equal to a CBR threshold in a channel configured by the base station; receiving, by the terminal, from the access point a resource allocation message including resource allocation information in response to the resource request message; and transmitting, by the terminal, data to the access point using a radio resource indicated by the resource allocation message.