V2X Terminal PSCCH PSSCH Transmission Duration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, V2X communication performance is degraded during congestion due to the lack of predefined restrictions on resource occupancy rates, particularly for the transmission duration of physical sidelink control channels (PSCCH) and shared channels (PSSCH) in legacy systems.
Innovation Solution
A method where V2X terminals determine and consecutively transmit PSCCH and PSSCH within a predefined transmission duration, with options for frequency or time division multiplexing based on channel busy ratio, ensuring that transmissions adhere to predefined restrictions (T_ON, T_OFF) to manage congestion effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminals transmit PSCCH and PSSCH without predefined restriction on transmission duration, then communication flexibility is maintained, but system performance degrades under congestion due to excessive resource occupancy
Solution Approach 1:
The patent applies dynamics by making the transmission duration adaptive rather than fixed. The terminal determines the transmission duration based on the channel busy ratio (CBR), allowing the system to dynamically adjust resource occupancy according to congestion conditions. When CBR is high, transmission duration is limited to reduce congestion impact; when CBR is low, longer transmission is permitted for better efficiency.
Solution Approach 2:
The patent changes the parameter of transmission duration based on channel conditions. By monitoring CBR and adjusting the maximum transmission duration accordingly, the system optimizes performance under varying congestion levels. This parameter adaptation resolves the contradiction between maintaining flexibility and preventing performance degradation.
2Ease of operation
If terminal performs V2X communication without resource occupancy restrictions, then ease of operation is maintained, but radio resource occupancy duration increases causing coexistence problems
Solution Approach 1:
The patent applies preliminary action by pre-determining the maximum transmission duration based on CBR before actual transmission begins. The terminal calculates the appropriate transmission duration in advance and then executes transmission within this predetermined limit, simplifying the operation while controlling resource occupancy duration.
3Area of stationary object
If legacy V2X system allows unrestricted PSCCH and PSSCH transmission, then communication coverage is extended, but congestion control capability is lost
Solution Approach 1:
The patent restores congestion control capability by dynamically adjusting transmission parameters based on CBR. The system maintains communication coverage by allowing transmission when CBR is low, while implementing control when CBR is high, thus resolving the contradiction between coverage and congestion control.
Data Source
AI summary
The present invention provides a method by which a vehicle-to-X (V2X) terminal performs a V2X operation in a wireless communication system, comprising: determining a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH), which are related to a specific transport block to be transmitted; and transmitting the PSCCH and the PSSCH, which are related to the transport block, wherein the PSCCH and the PSSCH are transmitted continuously during a transmission period.