Wireless Communication Node Sidelink Power Control with Beam-Specific Pathloss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing LTE V2X system's power control method for sidelink transmissions results in power waste when terminals are close to each other and fails to account for multiple beams, leading to potential interference with cellular networks.
Innovation Solution
A method for determining sidelink transmission power by receiving and processing multiple radio signals to identify optimal beams and pathlosses, ensuring minimal interference with cellular networks while meeting sidelink transmission requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmitting power is determined based on pathloss between Uu interfaces, then interference to cellular network uplink transmission is avoided, but power waste occurs when terminals are close to each other
Solution Approach 1:
The patent applies local quality by determining transmitting power separately for different links (Uu interface and sidelink) based on their respective pathloss characteristics. Instead of using a uniform power control method, the system calculates pathloss-specific power values for cellular uplink and sidelink transmissions, allowing optimal power allocation tailored to each communication scenario.
Solution Approach 2:
The patent segments the power control mechanism into distinct components: one for Uu interface power control and another for sidelink power control. By dividing the power determination process into separate pathloss-based calculations for different interfaces, the system can independently optimize power levels for cellular communications and device-to-device communications without mutual interference.
2Device complexity
If broadcast transmission mode is used in LTE V2X system, then system complexity is reduced, but adaptability to different application scenarios is limited
Solution Approach 1:
The patent introduces dynamic working modes that allow the V2X system to switch between broadcast, groupcast, and unicast transmission modes based on application requirements. This dynamic adaptability enables the system to optimize performance for different scenarios (e.g., using unicast for reliable one-to-one communication or broadcast for wide-area notifications) while maintaining a unified underlying framework that manages complexity.
Solution Approach 2:
The patent creates a universal power control framework that serves multiple transmission modes (broadcast, groupcast, unicast) through a common pathloss-based power determination mechanism. By designing the power control system to be mode-agnostic and applicable across different working modes, the patent achieves multi-functionality without proportionally increasing system complexity.
Data Source
AI summary
A method and device used in wireless communication node. A first node first receives K1 first-type radio signals, and then transmits a first signaling, receives a second signaling and transmits a first radio signal in sequence; the first signaling is used to indicate K2 first-type radio signal(s) of the K1 first-type radio signals, while the second signaling is used to indicate K3 first-type radio signal(s) of the K1 first-type radio signals; the K3 first-type radio signal(s) is(are) respectively used to determine K3 pathloss(es). By designing a mechanism of interaction between a terminal and a base station, and the channel quality of sidelink detected by the terminal to determine a transmitting power of sidelink, the present disclosure manages to reduce interference to a cellular network while ensuring sidelink performance, thus improving the system's overall performance.