Sidelink Grant Configuration for Multi-Destination V2X Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing V2X communication technologies face challenges in efficiently managing sidelink transmissions for multiple destinations, such as unicast and groupcast services, leading to reduced channel utilization and transmission reliability due to the lack of clear destination information for HARQ operations.
Innovation Solution
The solution involves indicating destination information in control information associated with sidelink grants, allowing transmitting terminal equipment to accurately determine the destination for sidelink data transmission, thereby optimizing resource allocation and improving channel utilization and transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device does not indicate destination information in sidelink grants, then the control information overhead is reduced, but the transmitting terminal equipment cannot perform accurate HARQ operations for multiple destinations, leading to reduced transmission reliability
Solution Approach 1:
The patent extracts the destination information indication from the sidelink grant by using a separate field in the downlink control information. This allows the sidelink grant to remain compact while destination identification is handled through a dedicated indicator field that points to pre-configured destination information, thus maintaining transmission reliability without significantly increasing overhead.
Solution Approach 2:
The patent applies preliminary action by pre-configuring destination information (such as destination IDs, resource pools, and HARQ parameters) before actual sidelink transmission. The network device provides this destination information in advance through RRC signaling or system information, allowing the transmitting terminal equipment to perform accurate HARQ operations without real-time overhead.
2Productivity
If the transmitting terminal equipment uses generic sidelink grants without destination-specific information, then resource allocation is simpler, but channel utilization decreases due to inability to optimize resources for different destinations
Solution Approach 1:
The patent applies local quality by allowing different destination terminal equipments to have different resource pool configurations, priority levels, and HARQ parameters. Each destination can be assigned specific resource pools optimized for its requirements, enabling the system to achieve high channel utilization through destination-specific resource optimization without requiring complete reconfiguration for each transmission.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Methods and apparatuses for transmitting and configuring sidelink data. The method includes: receiving by a terminal equipment control information including a sidelink grant and transmitted by a network device, the control information further indicating at least one piece of destination information to which the sidelink grant is directed; determining at least one destination and/or logical channel according to the destination information; and transmitting sidelink data of the at least one destination and/or logical channel according to the sidelink grant. Thus, the network device is enabled to schedule different resources for different destination terminal equipments, thereby improving channel utilization or transmission reliability.