D2D Control Channel Resource Segmentation for V2X Interference
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Solution Overview
Problem
In a Telematics or Vehicle to Everything (V2X) communication system, terminals supporting different communication protocols face challenges in joint data transmission due to interference issues when a terminal of Release-14 cannot detect control channels transmitted by a terminal of Release-15, which uses a short Transmission Time Interval (sTTI), leading to resource occupancy sensing failures.
Innovation Solution
A method where a first terminal device transmits resources scheduling information on control channel resources of different lengths, allowing second and third terminal devices supporting different protocol releases to detect resource usage, thereby enabling joint data transmission and reducing interference by using pre-configured resources pools for transmitting resources scheduling information of varying lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a terminal of Release-15 transmits control channels in sTTI to reduce transmission time delay, then the transmission time delay is reduced, but the terminal of Release-14 cannot detect the control channels, leading to resource occupancy sensing failure and interference
Solution Approach 1:
The control channel resources are segmented into two distinct types: first control channel resources with longer time domain length for Release-14 terminals, and second control channel resources with shorter time domain length for Release-15 terminals. This segmentation allows each terminal type to detect and sense resources appropriate to its protocol version, preventing resource occupancy sensing failures while maintaining the sTTI benefits for Release-15 terminals.
2Productivity
If terminals supporting different communication protocols jointly perform data transmission in a shared resources pool, then spectrum efficiency is improved, but interference occurs because terminals cannot detect control channels of different protocol versions
Solution Approach 1:
The invention introduces an intermediary mechanism where the first control channel resources serve as a common detection resource that both Release-14 and Release-15 terminals can detect. Release-15 terminals transmit control information on both first and second control channel resources, while Release-14 terminals transmit only on first control channel resources. This intermediary approach enables joint data transmission in the shared resources pool while preventing interference through proper resource detection.
Data Source
AI summary
The present application discloses a method for D2D communication, a terminal device, and a network device. The method includes: a first terminal device determining first control channel resources from pre-configured resources pool available for transmission of first resources scheduling information, and determining second control channel resources from the pre-configured resources pool available for transmission of second resources scheduling information, where the first control channel resources have a time domain length longer than that of the second control channel resources; and the first terminal device transmitting the first resources scheduling information on the first control channel resources, and transmitting the second resources scheduling information on the second control channel resources, where the first resources scheduling information and the second resources scheduling information are respectively used by a second terminal device and a third terminal device to determine data channel resources for the first terminal device.