Tone Reservation for Wireless Uplink PAPR Reduction
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing high peak-to-average power ratio (PAPR) in transmissions, which can lead to inefficiencies and potential interference.
Innovation Solution
Implementing tone reservation (TR) techniques to allocate frequency resources for peak reduction tones (PRTs), allowing for the transmission of signals that reduce PAPR by reserving specific frequency resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tone reservation techniques are implemented to reduce PAPR, then transmission efficiency is improved and interference is minimized, but device complexity and system configuration complexity increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting PAPR reduction parameters based on channel conditions, signal characteristics, and power availability. The system modifies tone reservation parameters, power allocation, and resource block assignments to optimize transmission efficiency while managing complexity through adaptive parameter tuning rather than fixed complex structures
Solution Approach 2:
The system implements dynamics by enabling real-time adaptation of tone reservation configurations based on varying channel conditions and traffic demands. The WTRU and network dynamically adjust PRT allocations, power levels, and resource assignments, allowing the system to maintain optimal performance across different operating conditions without requiring permanently complex hardware structures
2Reliability
If peak reduction tones are transmitted in addition to uplink data, then PAPR is reduced, but power consumption increases
Solution Approach 1:
The patent applies local quality by allocating power selectively to specific frequency resources where PRT transmission is most beneficial. Instead of uniformly increasing power across all frequencies, the system concentrates power in specific resource blocks and subcarriers where PAPR reduction is needed, while maintaining lower power in other regions, thus optimizing the trade-off between reliability and energy consumption
Solution Approach 2:
The system implements partial action by applying tone reservation to only the necessary portion of the frequency spectrum rather than the entire bandwidth. The WTRU transmits PRTs in selected resource blocks where they provide the most benefit for PAPR reduction, leaving other resource blocks for data transmission or idle, thereby reducing overall power consumption while maintaining effective PAPR control where needed
Data Source
AI summary
Methods, apparatuses, systems, etc., directed to performing a change of relay are disclosed herein. In an embodiment, a wireless transmit/receive unit (WTRU) may transmit an information for requesting a peak reduction tone (PRT) configuration for reducing a peak to average power ratio (PAPR). In an embodiment, the WTRU may receive an indication of frequency resources to be used for transmitting a PRT signal based on the PRT configuration. In an embodiment, the WTRU may transmit the PRT signal in the frequency resources in addition to an uplink (UL) transmission, wherein the frequency resources for the PRT signal may be allocated based on a set of frequency resources allocated to the UL transmission.