Sidelink Resource Scheduling for Out-of-Coverage V2V and D2D
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Solution Overview
Problem
Existing V2V and D2D communication systems face challenges with interference suppression and congestion control, particularly in scenarios without base station coverage, leading to reduced transmission success rates and increased delays due to random resource selection, which limits high-capacity communication.
Innovation Solution
Implementing a scheduling terminal to configure sidelink transmission resources for terminals out of base station coverage, using RSUs or additional D2D terminals with scheduling functions to dynamically allocate resources, converting Out of Coverage scenarios into In Coverage scenarios, thereby reducing interference and enhancing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals out of base station coverage randomly select sidelink transmission resources, then device autonomy is maintained, but resource conflicts and interference increase, reducing transmission success rate
Solution Approach 1:
The patent introduces a scheduling terminal as an intermediary entity that mediates resource allocation between terminals out of base station coverage. This scheduling terminal receives scheduling requests from other terminals, determines appropriate sidelink transmission resources, and sends scheduling grants back to the requesting terminals. This intermediary mechanism resolves the contradiction by providing centralized resource coordination without requiring direct base station involvement, thereby maintaining high transmission success rates while avoiding the complexity of fully distributed random selection.
2Productivity
If terminals use pure Ad Hoc networking with self-organization mechanism for resource scheduling, then system autonomy is improved, but communication delay increases and transmission success rate decreases as the number of terminals increases
Solution Approach 1:
The patent segments the V2X communication system into two distinct operational modes: In-Coverage mode where base station centralized scheduling is used, and Out-of-Coverage mode where scheduling terminal-based semi-centralized scheduling is used. This segmentation allows the system to optimize for communication efficiency in In-Coverage areas while providing structured resource coordination in Out-of-Coverage areas, avoiding the delays associated with fully distributed Ad Hoc scheduling. The segmentation principle enables the system to achieve high productivity without the time loss inherent in pure self-organization mechanisms.
3Quantity of substance
If hundreds of vehicles simultaneously transmit sensor sharing information within a range of hundreds of meters, then communication capacity is increased, but interference between terminals increases, requiring effective interference suppression
Solution Approach 1:
The patent implements dynamic resource allocation where the scheduling terminal continuously monitors the sidelink communication environment, tracks resource utilization patterns, and adjusts scheduling decisions in real-time based on current interference conditions and channel quality. This dynamic approach enables the system to accommodate a high quantity of simultaneous transmissions by adaptively managing resource distribution, thereby supporting hundreds of vehicles communicating within a limited area while actively suppressing terminal-to-terminal interference through intelligent, real-time resource coordination.
Data Source
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AI summary
Provided in an embodiment of the present invention is a method for transmitting data via a sidelink. The method comprises: a scheduling terminal sends to a transmitting terminal a first physical control signal, wherein the first physical control signal comprises a first transmission resource used to transmit first-type system information; and the scheduling terminal sends to the transmitting terminal the first-type system information, wherein the first-type system information comprises sidelink resource pool information used for transmission via a sidelink between the transmitting terminal and a receiving terminal. In the embodiment of the present invention, a scheduling terminal can configure a sidelink transmission resource for a transmitting terminal, thereby significantly increasing success rates of D2D and V2V communication, reducing delay, and expanding the capacity of D2D and V2V communication.