Random Access Preamble Repetition Skipping for Tight Slot Gaps
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing random access procedures, particularly in heterogeneous networks with varying cell sizes and traffic loads, leading to inefficiencies in resource allocation and user equipment mobility management.
Innovation Solution
Implementing a flexible and configurable mechanism for wireless devices and base stations to adapt random access procedures based on specific criteria such as device capabilities, traffic load, and system setup, utilizing multiple technologies and releases, and employing modules for efficient resource management and beam management protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single random access procedure is used for all cell sizes, then implementation is simple, but performance is suboptimal in heterogeneous networks with varying cell sizes and traffic loads
Solution Approach 1:
The patent implements dynamic random access configuration where the random access procedure is adapted based on cell size and traffic load conditions. Different random access parameters (such as preamble formats, root indices, and power ramping settings) are dynamically selected according to the specific network conditions, allowing the system to optimize performance for both small cells with high traffic and large cells with low traffic without requiring completely separate procedures for each scenario.
2Productivity
If random access parameters are optimized for small cells, then small cell performance improves, but large cell coverage and performance deteriorate
Solution Approach 1:
The patent applies local quality by configuring random access parameters specifically tailored to each cell's characteristics. Small cells receive optimized parameters such as higher preamble densities and adjusted power settings to maximize access success rates in high-traffic scenarios, while large cells are configured with parameters suited for broader coverage requirements. This localized optimization ensures that each cell type operates at peak performance without compromising the other.
3Productivity
If multiple random access procedures are configured for different scenarios, then performance in heterogeneous networks improves, but configuration and management complexity increases
Solution Approach 1:
The patent manages multiple random access procedures by systematically varying key parameters such as preamble root indices, power ramping steps, and timing configurations across different cell types and traffic conditions. Rather than creating entirely separate procedures, the system maintains a coordinated set of procedures that differ primarily in these adjustable parameters, reducing management complexity while still achieving optimized performance across heterogeneous network scenarios.
Data Source
AI summary
A method can include receiving, by a wireless device, one or more configuration parameters indicating a synchronization signal block (SSB). The method can also include determining, based on a received signal power of the SSB, a number of repetitions of a preamble for a random access procedure. The method can further include determining a gap between a first symbol of a first repetition, of the number of repetitions, of the preamble in a first slot and a second symbol of a second repetition, of the number of repetitions, of the preamble in a second slot to be less than a first number of symbols. The method can additionally include foregoing, skipping, omitting, or otherwise not transmitting the second repetition of the preamble based on determining the gap to be less than the first number of symbols.