Multiplexing Transmit Power Control With Sidelink Data Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication networks face interference challenges that degrade performance, particularly in sidelink communications, due to increasing demand for mobile broadband access and stringent latency and reliability requirements for devices like Industrial Internet of Things (IIoT) equipment, which existing technologies fail to adequately address.
Innovation Solution
The solution involves multiplexing transmit power control (TPC) information with sidelink data traffic in sidelink communications between user equipment (UEs), enabling closed-loop power control to adjust transmit power and reduce interference, thereby improving reliability and signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit power is increased to improve signal quality and reliability, then communication reliability is improved, but interference to other transmissions increases
Solution Approach 1:
The patent implements closed-loop transmit power control where the receiving UE measures the received signal power and sends TPC commands back to the transmitting UE to adjust its power level. This feedback mechanism allows dynamic adjustment of transmit power to maintain reliable communication while minimizing interference to other transmissions.
Solution Approach 2:
The patent enables dynamic power adjustment by allowing TPC information to be multiplexed with data traffic on the sidelink. This dynamic control allows the transmit power to be adjusted in real-time based on channel conditions and interference levels, rather than using fixed power levels.
2Measurement precision
If TPC information is transmitted separately from data traffic, then power control accuracy is improved, but signaling overhead and resource consumption increase
Solution Approach 1:
The patent merges TPC information with data traffic by multiplexing them on the same physical channel (PSSCH). This combining approach maintains power control functionality while reducing signaling overhead, as the TPC commands are embedded within the data transmission rather than requiring separate dedicated resources.
Solution Approach 2:
The patent makes the data channel (PSSCH) multi-functional by enabling it to carry both data traffic and TPC information simultaneously. This universal usage of the channel eliminates the need for separate dedicated TPC channels, reducing overall resource consumption while maintaining control accuracy.
Data Source
AI summary
This disclosure provides systems, methods, and devices for wireless communication that support closed-loop transmit power control (TPC) for user equipment (UE) sidelink communications. TPC information may be provided, by a first UE receiving transmissions from a second UE, with respect to a sidelink implemented between the UEs. TPC information may be multiplexed with sidelink data traffic in a sidelink communication between UEs. The TPC information may include a TPC indicator and one or more TPC messages for providing TPC commands with respect to one or more sidelinks. The sidelink data traffic of some examples may include data-only traffic, such as semi-persistent scheduled (SPS) data traffic, that is decoupled from accompanying sidelink control information (SCI). Other aspects and features are also claimed and described.