Sidelink Feedback Power Control for Multi-RB Transmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power control techniques for sidelink feedback transmissions in wireless communication systems are inadequate for multi-RB, multi-symbol, or multi-bit transmissions, leading to unreliable sidelink feedback due to poor transmit power determination, which is based solely on nominal power, subcarrier spacing, and downlink pathloss.
Innovation Solution
A user equipment (UE) is configured to receive power control settings for sidelink feedback transmissions, adjusting transmit power based on the quantity of resource blocks, symbols, sidelink pathloss, or transmission size, incorporating additional factors such as modulation and coding schemes and closed-loop power control to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PSFCH transmission uses only a single resource block and single bit, then device complexity is reduced, but reliability deteriorates
Solution Approach 1:
The patent implements dynamic PSFCH transmission formats that can adapt between single-RB/single-bit and multi-RB/multi-bit configurations based on application requirements. The system dynamically selects transmission parameters including number of resource blocks, symbols, and bits to balance complexity and reliability for different sidelink scenarios such as V2V, IIoT, or general cellular communications.
2Reliability
If PSFCH transmission occupies multiple resource blocks and symbols, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent changes key transmission parameters including the number of resource blocks (1 or multiple), symbols (1 or multiple), and information bits (1 or multiple) to achieve different reliability levels. By adjusting these parameters, the system can provide enhanced reliability for critical applications while maintaining simpler configurations for less critical communications, thus managing device complexity effectively.
3Device complexity
If transmit power control uses only nominal power and downlink pathloss, then device complexity is reduced, but reliability deteriorates for multi-RB/multi-symbol transmissions
Solution Approach 1:
The patent applies preliminary power adjustment factors before transmission based on the configured PSFCH format and transmission characteristics. The UE determines appropriate power control parameters in advance, considering the number of resource blocks, symbols, and the specific application scenario, to ensure adequate transmit power is allocated before the actual transmission occurs.
4Reliability
If transmit power is increased for multi-RB/multi-symbol PSFCH transmissions, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes the relationship between transmission parameters (number of RBs, symbols, bits) and transmit power by implementing format-specific power control. Instead of uniformly increasing power for all multi-RB/multi-symbol transmissions, the system adjusts power based on the specific configuration and application requirements, thereby improving reliability only when necessary while managing energy consumption effectively.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for sidelink feedback power control. The UE may transmit a sidelink feedback transmission, in accordance with the configuration, using a transmit power that is based at least in part on at least one of: a quantity of resource blocks (RBs) associated with the sidelink feedback transmission, a quantity of symbols associated with the sidelink feedback transmission, a sidelink pathloss value, or a size of the sidelink feedback transmission. Numerous other aspects are provided.