RACH Occasion Power Control for Additional Activated Access Slots
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power control for additional activated random access channel occasions, particularly in scenarios where additional ROs are transparent to some user equipment (UEs), leading to inefficiencies in energy consumption and communication performance.
Innovation Solution
Implementing distinct power control parameters before and after the activation of additional ROs, where NES-capable UEs use a first set of parameters for the original ROs and a second set for activated ROs, including power offsets, maximum transmission power adjustments, and increment steps, to optimize power usage and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional ROs are activated to improve random access capacity, then communication performance is improved, but power control complexity increases
Solution Approach 1:
The patent segments the RO set into original ROs and additional activated ROs, applying different power control parameter sets to each segment. This allows the system to handle increased random access capacity through multiple ROs while managing power control complexity by treating different RO types distinctly with appropriate parameter configurations.
Solution Approach 2:
The patent implements dynamic power control parameter adjustment based on RO activation status. The network can dynamically activate or deactivate additional ROs and switch between first and second power control parameter sets accordingly, enabling flexible adaptation to changing traffic conditions while maintaining manageable power control complexity.
2Loss of energy
If distinct power control parameters are used for additional ROs, then power usage efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent uses a unified power control parameter structure where the second power control parameter set extends the first set with additional parameters. This multi-functional approach allows the same signaling mechanism to handle both original and additional ROs, improving power usage efficiency while minimizing signaling overhead through parameter reuse and extension rather than complete separate configurations.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The network may schedule a set of random access channel (RACH) occasions (ROs). The network may activate one or more additional ROs. A UE may use a first set of power control parameters for a RACH transmission in an RO of the original set of ROs prior to activation of the one or more additional ROs. In some examples, after the activation of the additional RO(s), the UE may use a second set of power control parameters for RACH messages in both original set of ROs and the additional RO(s). In some examples, after the activation of the one or more additional ROs, the UE may use the first set of power control parameters for RACH messages in the original set of ROs and the second set of power control parameters in the additional RO(s).