AGC Signal Target Indication for Sidelink UE Power Reduction
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Solution Overview
Problem
Current sidelink communication systems in wireless communication systems, such as 5G NR, face inefficiencies in power and time consumption due to blind monitoring and processing of sidelink communications by receiving user equipment (UEs).
Innovation Solution
A method where a transmitting UE (Tx UE) indicates the target receiving UE (Rx UE) through an automatic gain control (AGC) signal transmitted in a specific resource block (RB), allowing the Rx UE to determine if the sidelink communication is intended for it and refrain from processing unnecessary signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Rx UE performs blind monitoring and processing of all sidelink communications, then it can ensure reception of intended communications, but power consumption and processing time increase significantly
Solution Approach 1:
The patent applies preliminary action by transmitting the AGC signal before the actual sidelink data transmission. The AGC signal serves as a preliminary indicator that prepares the Rx UE to identify whether subsequent communications are intended for it, thereby avoiding full blind monitoring of all sidelink transmissions and reducing power consumption while maintaining reliable reception of intended communications
2Reliability
If Rx UE monitors all sidelink communications to identify intended transmissions, then communication reliability is maintained, but monitoring time and system efficiency deteriorate
Solution Approach 1:
The patent extracts the target indication function from the main data transmission by using the AGC signal to carry target UE identification information. This separation allows the Rx UE to quickly determine if a communication is intended for it by checking the AGC signal alone, without needing to fully monitor and process all sidelink transmissions, thereby reducing monitoring time while maintaining communication reliability
3Productivity
If AGC signal is transmitted in a specific RB associated with target UE, then target indication efficiency improves, but resource allocation complexity increases
Solution Approach 1:
The patent applies self-service by having each Rx UE monitor only its own associated RB for the AGC signal. The resource block allocation is configured such that each UE can independently determine whether received sidelink communications are intended for it by checking its designated RB, eliminating the need for complex centralized resource allocation and enabling efficient autonomous target identification
Data Source
AI summary
Aspects are provided which allow AGC symbols to be applied for identifying or indicating target Rx UEs of sidelink communications from Tx UEs. A Tx UE transmits an AGC signal to a Rx UE in a RB associated with the Rx UE. The Rx UE receives the AGC signal from the Tx UE. The Tx UE transmits sidelink data to the Rx UE after the AGC signal. The Rx UE decodes sidelink data from the Tx UE in response to the AGC signal being received in a RB associated with the Rx UE. The Rx UE refrains from decoding the sidelink data from the Tx UE in response to the AGC signal being received in a different RB than the RB associated with the Rx UE. In this way, Rx UEs may save monitoring and processing power and time in receiving and decoding sidelink communications.