eRedCap Bandwidth Mode Switching for Power and Data Rate Trade-offs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication networks face challenges in reducing complexity, power usage, and data rate requirements, particularly for enhanced reduced capability user equipment (eRedCap) devices operating with limited bandwidth.
Innovation Solution
The implementation of an enhanced reduced capability user equipment (eRedCap) that utilizes different bandwidth modes, such as a maximum of 5 MHz, and switches between them, along with features like half-slot synchronization signal/physical broadcast channel (SSB) patterns, random access response and paging message repetitions, and a maximum data rate scaling factor, to optimize communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If bandwidth is reduced to 5 MHz for eRedCap devices, then power consumption and complexity are reduced, but data rate capability deteriorates
Solution Approach 1:
The system dynamically switches between two bandwidth modes (first bandwidth mode with larger bandwidth and second bandwidth mode with smaller bandwidth of 5 MHz) based on the type of transmission. This allows the eRedCap device to adapt its bandwidth usage to specific communication needs, reducing power consumption during normal operations while maintaining high data rate capability when needed.
Solution Approach 2:
The patent changes the bandwidth parameter from a fixed value to a variable that can switch between two modes. By determining the transmission type and selecting the appropriate bandwidth mode, the system optimizes the balance between power consumption and data rate capability according to actual communication requirements.
2Device complexity
If bandwidth is reduced to 5 MHz for eRedCap devices, then device complexity is reduced, but data rate capability deteriorates
Solution Approach 1:
The system implements dynamic bandwidth mode switching between a first bandwidth mode (larger bandwidth) and a second bandwidth mode (5 MHz smaller bandwidth). This dynamic adaptation allows the device to maintain lower complexity during normal operations while preserving the capability to achieve higher data rates when transmission requirements demand it.
Solution Approach 2:
The bandwidth parameter is transformed from a fixed configuration to a switchable parameter with two modes. The device determines the appropriate bandwidth mode based on transmission type, thereby optimizing the balance between complexity reduction and data rate capability maintenance.
3Productivity
If bandwidth mode switching is implemented, then communication efficiency is optimized, but transmission coordination complexity increases
Solution Approach 1:
The base station determines in advance whether the user equipment is an eRedCap device and pre-determines the appropriate bandwidth mode and scaling factor before transmission. This preliminary determination simplifies the coordination process by establishing the bandwidth mode and data rate scaling factor beforehand, avoiding complex real-time negotiations during transmission.
Solution Approach 2:
The system uses downlink control information to convey the determined bandwidth mode and scaling factor to the user equipment, creating a feedback mechanism that ensures both transmitter and receiver are synchronized on the transmission parameters, thereby managing coordination complexity effectively.
Data Source
AI summary
Disclosed are methods, systems, and computer-readable medium to perform operations including: determining a number of repetitions for a random access response or a paging message using downlink control information; receiving one or more instances of the random access response or the paging message; and decoding at least one of the one or more instances of the random access response or the paging message using the number of repetitions.