Sidelink Transmission Property Adjustment via Path Loss Estimation
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Solution Overview
Problem
Current power control procedures in sidelink communications are inadequate due to infrequent adjustments and reliance on static transmit power, leading to unreliable performance, especially in dynamic environments with varying channel conditions and high mobility of user equipment.
Innovation Solution
A method and apparatus for dynamic transmission property adjustment in sidelink communications, where a transmission-adjusting wireless node receives transmit power information from a power-reporting node via a sidelink channel, determines the transmission-specific estimated path loss, and adjusts its transmission properties, such as transmit power and modulation and coding schemes, to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static transmit power is used in sidelink communications, then device complexity is reduced, but reliability deteriorates due to inability to adapt to dynamic channel conditions
Solution Approach 1:
The patent implements a feedback mechanism where the first wireless node reports transmit power information to the second wireless node, which then adjusts its transmission parameters based on this feedback. This closed-loop feedback system enables dynamic adaptation to channel conditions while distributing the control complexity between nodes, resolving the contradiction between reliability improvement and device complexity increase.
Solution Approach 2:
The patent transitions from static transmit power to dynamic transmit power adjustment by enabling the second wireless node to modify its transmission parameters in real-time based on reported power information and path loss calculations. This dynamic adaptation allows the system to respond to changing channel conditions, improving reliability without requiring overly complex centralized control.
2Reliability
If frequent transmission property adjustments are made, then reliability is improved through better adaptation to channel conditions, but use of energy increases due to more frequent measurements and adjustments
Solution Approach 1:
The patent implements periodic power control where transmission properties are adjusted at specific intervals rather than continuously. The second wireless node performs path loss determination and transmission property adjustment periodically based on received power reports, which balances the need for reliable communication with energy conservation by avoiding unnecessary frequent adjustments.
3Manufacturing precision
If transmission properties are adjusted based on transmission-specific estimated path loss, then communication quality is improved, but device complexity increases due to real-time path loss calculation requirements
Solution Approach 1:
The patent uses transmit power information reported by the first wireless node as an intermediary parameter to facilitate path loss calculation at the second wireless node. Rather than requiring complex bidirectional measurements, the system uses the reported power information as a mediator to simplify the path loss determination process while maintaining precision in transmission property adjustment.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmission-adjusting wireless node may receive a transmission transmitted by a power-reporting wireless node via a sidelink channel. The transmission may include information relating to a transmit power of the transmission. The transmission-adjusting wireless node may determine a transmission-specific estimated path loss of the sidelink channel based at least in part on the transmit power of the transmission. The transmission-adjusting wireless node may adjust, based at least in part on the transmission-specific estimated path loss, a transmission property of the transmission-adjusting wireless node to obtain an adjusted transmission property. The transmission-adjusting wireless node may transmit a communication to the power-reporting wireless node using the adjusted transmission property. Numerous other aspects are provided.