V2X UE PSCCH Transmission Multi-Carrier DCI Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently indicating control information on multiple carriers for vehicle-to-everything (V2X) communication, particularly in sidelink scenarios, which affects the operation of vehicle-to-everything user equipment (UE) without increasing conventional UE operation impacts.
Innovation Solution
A method for a vehicle-to-everything (V2X) user equipment (UE) that receives DCI for sidelink semi-persistent scheduling (SL SPS) and transmits Physical Sidelink Control Channel (PSCCH) on multiple carriers, allowing simultaneous SPS configuration and release across carriers using a single DCI, with time and frequency resource allocation optimized to minimize overhead and maintain seamless operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control information is indicated on multiple carriers using separate DCI formats, then each carrier can be controlled independently, but the overhead and complexity of DCI formats increase
Solution Approach 1:
The patent combines control information for multiple carriers into a single DCI format. Specifically, a first DCI format is used to indicate control information for a first carrier, and a second DCI format (which may be the same or different from the first) is used to indicate control information for a second carrier. This merging approach reduces the number of separate DCI messages needed while maintaining the ability to control multiple carriers independently through a unified scheduling mechanism.
Solution Approach 2:
The patent creates a universal DCI format structure that can function across multiple carriers. The second DCI format is designed to be applicable to a second carrier while potentially serving as a template for subsequent carriers. This multi-functional design allows the same DCI format structure to be reused across different carriers, reducing overall system complexity while maintaining adaptability.
2Measurement precision
If multiple DCI formats are used for multiple carriers, then each carrier's control information can be precisely indicated, but the overhead of control signaling increases
Solution Approach 1:
The patent segments control information indication into multiple DCI formats that can be applied to different carriers. By dividing the control signaling into manageable DCI format segments (first DCI format for first carrier, second DCI format for second carrier), the system maintains precise control over each carrier's parameters while managing overhead through structured segmentation rather than monolithic control messages.
Solution Approach 2:
Instead of using one comprehensive DCI format for all carriers (which would increase precision but overwhelm overhead), the patent inverts the approach by using multiple specialized DCI formats. Each DCI format is optimized for its specific carrier, achieving precise control information indication while the modular nature of separate DCI formats actually reduces total overhead compared to a single large format containing all carrier information.
3Adaptability or versatility
If conventional UE operation is maintained without modification, then backward compatibility is preserved, but the ability to support multi-carrier V2X communication is limited
Solution Approach 1:
The patent introduces dynamic behavior to UE operation through the use of multiple DCI formats that can be selectively applied. The UE dynamically switches between first DCI format and second DCI format depending on which carrier is being controlled. This dynamic adaptation allows the UE to support multi-carrier V2X communication while maintaining a relatively simple base operation mode that resembles conventional single-carrier operation, thus preserving ease of manufacture for basic functionality while enabling advanced multi-carrier capabilities.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3~4
AI summary
An embodiment of the present invention is a PSCCH transmission method. The method for a vehicle to everything (V2X) terminal to receive physical sidelink control channel (PSCCH) scheduling information and transmit a physical sidelink control channel (PSCCH) in a wireless communication system includes: a step for receiving Downlink control information related to sidelink semi persistent scheduling (SL SPS); a step for transmitting a first PSCCH in response to an instruction for activating an SL SPS configuration of the downlink control information; and a step for transmitting a second PSCCH among reserved resources after transmitting the PSCCH, wherein, when the downlink control information is related to the SL SPS for two or more component carriers (CCs), time resource units at which the first PSCCH is transmitted in each CC do not overlap with each other.