Random Access Resource Configuration for Uplink Capacity
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Solution Overview
Problem
The introduction of massive NR-light terminal devices in communication systems, such as Industrial Wireless Sensors, Video Surveillance, and Wearables, poses a challenge by impacting the uplink capacity of cells, particularly in terms of initial access resources and uplink transmission resources.
Innovation Solution
A method for random access is introduced, where a terminal device determines a target random access resource configuration from a plurality of configured random access resource configurations, which can belong to one initial uplink bandwidth part (BWP) or be located in different UL BWPs, thereby increasing the access capacity of the terminal device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single random access resource configuration is used, then the device complexity is low, but the uplink capacity and access success rate deteriorate due to resource contention among multiple terminal devices
Solution Approach 1:
The patent divides the random access resources into multiple configurations (first random access resource configuration and second random access resource configuration) within the initial uplink bandwidth part. This segmentation allows terminal devices to select from multiple distinct resource sets, reducing contention and improving uplink capacity while maintaining manageable complexity through structured resource organization.
Solution Approach 2:
The patent introduces an additional dimension to random access resources by configuring resources not only in the time-frequency domain but also through multiple configuration sets that can be selectively activated. This dimensional expansion allows the system to accommodate more terminal devices simultaneously without proportionally increasing resource overhead.
2Reliability
If multiple random access resource configurations are configured, then the access success rate improves by reducing resource collision, but the device complexity and signaling overhead increase
Solution Approach 1:
The patent segments random access resources into multiple configurations with distinct parameters (e.g., different time slots, frequency resources, or preamble formats). This segmentation reduces resource collision probability by providing diverse access options, while the structured organization of these segments maintains manageable device complexity through systematic resource management.
Solution Approach 2:
The patent employs parameter changes by configuring multiple random access resource sets with different characteristics (time, frequency, code domain parameters). Terminal devices can select configurations based on channel conditions or device type, improving access success rate through parameter optimization while the network manages complexity through centralized configuration control.
3Productivity
If random access resources are distributed across multiple UL BWPs, then access capacity increases, but the device complexity and resource management overhead increase
Solution Approach 1:
The patent segments the uplink bandwidth into multiple BWPs, each containing specific random access resource configurations. This segmentation allows access capacity to scale with bandwidth while maintaining manageable device complexity through BWP-specific resource management, where devices only need to process relevant BWP configurations rather than the entire spectrum.
Solution Approach 2:
The patent utilizes the BWP dimension to organize random access resources, adding a bandwidth part layer to the resource hierarchy. This dimensional organization allows the system to scale access capacity by activating additional BWPs while keeping device complexity manageable through selective BWP processing and configuration.
Data Source
AI summary
The embodiments of the present application relate to a method for random access, a terminal device, and a network device, capable of increasing the uplink capacity of the terminal device for random access, thus effectively increasing the success rate of the terminal device accessing a network. The method for random access comprises: a terminal device determines a target random-access resource configuration among random-access resource configurations of multiple configurations, the target random-access resource configuration being used for random access by the terminal device, and the multiple random-access resource configurations belonging to one initial uplink bandwidth part (BWP), or the multiple random-access resource configurations being located in different uplink BWPs.