Random Access Resource Configuration for Non-Terrestrial Networks
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Solution Overview
Problem
Existing random access channel resource configuration methods cannot meet the requirements of different types of terminal devices simultaneously in non-terrestrial networks, leading to preamble receiving window ambiguity and reduced RACH capacity due to varying signal propagation delays and terminal device capabilities.
Innovation Solution
A communication method where a network device configures distinct random access resources for terminal devices with and without timing advance pre-compensation capabilities, allowing each type to use appropriate resources for random access, thereby avoiding configuration conflicts and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a longer RACH occasion interval is set to avoid preamble receiving window ambiguity, then the reliability of random access is improved, but the RACH capacity is reduced
Solution Approach 1:
The patent divides the RACH resource configuration into separate configurations for different terminal device types. First-type terminal devices (with TA pre-compensation capability) use one RACH resource configuration, while second-type terminal devices (without TA pre-compensation capability) use another configuration. This segmentation allows each type to use optimized parameters, resolving the contradiction between reliability and capacity.
Solution Approach 2:
The patent applies different RACH configuration parameters (such as different RO intervals) to different terminal device types based on their specific capabilities. Instead of using a uniform configuration for all devices, the system tailors the local quality of RACH resources to match the requirements of each device type, thereby improving both reliability for devices needing it and capacity for devices that don't require extended windows.
2Device complexity
If a uniform RACH resource configuration is used for all terminal devices, then the device complexity is reduced, but the adaptability to different terminal capabilities is worsened
Solution Approach 1:
The patent segments the terminal device population into distinct types based on TA pre-compensation capability and provides tailored RACH configurations for each segment. The network device identifies the terminal type and selects the appropriate configuration, maintaining simplicity for each device while achieving overall adaptability through the segmented approach.
Solution Approach 2:
The patent creates a universal RACH configuration framework that can accommodate multiple terminal device types through type-specific parameters. The same RACH resource structure serves both first-type and second-type devices, but with optimized parameters for each, achieving multi-functionality without requiring completely separate systems.
Data Source
AI summary
A communication method includes that: a terminal device receives configuration information from a network device, where the configuration information indicates a random access resource for an uplink carrier corresponding to a first-type terminal device and a random access resource for an uplink carrier corresponding to a second-type terminal device; and the terminal device initiates random access based on the configuration information. A terminal device and a network device are also provided.