Sidelink Resource Allocation via SCI Indication for V2X Collision Avoidance
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Solution Overview
Problem
In Device to Device (D2D) communication systems, especially in Vehicle to Everything (V2X) scenarios, there is a challenge in managing sidelink transmission resources to avoid collisions between terminals operating in different modes, as the network device may not always be aware of resource usage by terminal devices in Mode 4, leading to potential interference.
Innovation Solution
A method where a first terminal device receives configuration information from a network device to allocate sidelink transmission resources and transmits indication information to other devices, allowing them to avoid using these resources, and also sends resource reservation indication for subsequent transmissions, ensuring that other devices can determine if resources are reserved and thus avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices in Mode 1 and Mode 2 share the same resource pool, then resource utilization efficiency is improved, but transmission resource collisions between different modes occur
Solution Approach 1:
The patent introduces SCI (Sidelink Control Information) as an intermediary mechanism that carries indication information about allocated resources. This intermediary allows terminal devices to communicate resource allocation status to other terminals, enabling Mode 1 and Mode 2 terminals to share resources while avoiding collisions through the mediation of control information exchange.
Solution Approach 2:
The patent implements a feedback mechanism where terminal devices transmit indication information in SCI about their allocated resources to other terminals. This feedback loop allows the system to maintain resource sharing benefits while preventing collisions through continuous information exchange and resource status updates.
2Reliability
If network devices allocate transmission resources to terminal devices, then transmission reliability is improved, but network device awareness of resource usage by Mode 4 terminals is insufficient
Solution Approach 1:
The patent enables terminal devices to autonomously manage and indicate their resource usage status through SCI transmission. Terminal devices in Mode 4 can self-manage resource allocation and communicate this information to the network and other terminals, reducing the network's information loss while maintaining autonomous terminal operation.
Solution Approach 2:
The SCI message acts as an intermediary that bridges the information gap between terminal devices and the network device. It allows terminals to convey their resource usage status to the network without requiring constant network control, thus reducing information loss while maintaining network awareness.
3Ease of operation
If terminal devices transmit without resource reservation indication, then transmission simplicity is maintained, but interference between terminal devices increases
Solution Approach 1:
The patent implements preliminary action by having terminal devices transmit resource reservation indication information in advance through SCI before actual data transmission. This allows other terminals to be alerted of upcoming transmissions and avoid resource collisions, preventing interference before it occurs while adding minimal complexity to the transmission process.
Data Source
AI summary
The embodiments of the present disclosure provide a resource sharing method and apparatus, and a terminal device. The method includes: receiving, by a first terminal device, first configuration information transmitted by a network device, the first configuration information being used to configure one or more first sidelink transmission resources; and transmitting, by the first terminal device, first indication information on a sidelink, the first indication information being used to determine the one or more first sidelink transmission resources.