Sidelink Resource Allocation in 5G V2X Nodes
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Solution Overview
Problem
In 5G V2X communication systems, existing technologies face challenges in efficiently utilizing sidelink resources, particularly in avoiding interference between Vehicle-to-Everything (V2X) transmissions and cellular link receptions, and in providing flexible resource allocation for diverse application scenarios.
Innovation Solution
The method involves transmitting signaling to determine reference signals for sidelink communications, using multicarrier symbols marked as 'D' or 'F' for V2X transmissions, and providing multiple beams for receivers to select the best transmission beam, ensuring that V2X transmissions do not interfere with cellular link receptions by using distinct beams and resource pools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If V2X transmissions use uplink spectrum resources in TDD mode, then V2X communications can be established, but interference between V2X transmissions and cellular link receptions occurs
Solution Approach 1:
The patent segments the time-domain resources by introducing separate downlink resource pools for V2X communications distinct from traditional uplink resources. This segmentation allows V2X transmissions to occur in downlink time slots without interfering with cellular link receptions, resolving the contradiction between enabling V2X communication and avoiding interference.
Solution Approach 2:
The patent transitions from using only uplink time slots to utilizing downlink time slots as well, adding a temporal dimension to resource allocation. By introducing downlink resource pools with specific downlink slots marked as type 2, the system creates additional transmission opportunities for V2X without compromising cellular link performance.
2Adaptability or versatility
If flexible resource allocation is implemented for diverse application scenarios, then system adaptability improves, but resource management complexity increases
Solution Approach 1:
The patent applies local quality by differentiating resource pool configurations based on specific application scenarios. Different downlink resource pools are defined with distinct characteristics (e.g., different slot types, durations, and allocation patterns) tailored to specific V2X use cases such as vehicle platooning, extended sensors, and advanced driving, allowing optimized resource allocation for each scenario without requiring complete system redesign.
Solution Approach 2:
The patent introduces dynamic resource allocation mechanisms where the network can flexibly configure downlink resource pools based on real-time traffic conditions and application requirements. The system can dynamically activate or deactivate specific resource pools and adjust their parameters to match current operational needs, providing adaptability while managing complexity through network-controlled dynamic configuration.
Data Source
AI summary
A method and device in a node for wireless communications. A first node firstly transmits a target signaling; and then transmits a first signaling and a second signaling; and transmits a first signal in a first radio resource set; the target signaling is used to determine a target reference signal; the first signaling and the second signaling are respectively used to indicate a first radio resource pool and a second radio resource pool; the type of multicarrier symbols comprised in the first radio resource pool is a first type; there is at least one of multicarrier symbols comprised in the second radio resource pool that is of a type other than the first type; the present disclosure, by transmitting a first signal on resources other than cellular link uplink resources, manages to enhance the chance of feedback information transmission in sidelink, thereby improving the spectrum of the sidelink transmission.