Random Access Type Selection Using Position Information in NTN
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Solution Overview
Problem
In Non-Terrestrial Networks (NTN), the lack of obvious RSRP differences between terminal devices at the cell center and edge leads to difficulties in setting appropriate RSRP thresholds for random access type selection, resulting in poor random access performance and user experience.
Innovation Solution
A method and apparatus for random access that involves acquiring configuration information and position information, using this data to determine a suitable random access type, and initiating the random access accordingly, thereby ensuring optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RSRP measurement is used to select random access type in NTN system, then random access type selection can be performed, but it is difficult to set appropriate RSRP threshold and terminal device may select inappropriate random access type due to RSRP measurement error
Solution Approach 1:
The patent changes the selection parameter from RSRP (signal strength) to position information (distance from reference point). This parameter substitution resolves the measurement precision issue because position information provides a more reliable basis for random access type selection in NTN systems where RSRP differences are not obvious between cell center and edge terminals.
2Reliability
If RSRP measurement is used for random access type selection, then terminal device can determine channel state, but random access performance deteriorates due to inability to set appropriate threshold in NTN
Solution Approach 1:
The patent substitutes the selection criterion from RSRP-based channel state to position-based distance from reference point. This resolves the contradiction by providing a more reliable basis for random access type selection in NTN systems, improving random access performance while maintaining the ability to determine appropriate access types.
3Loss of time
If terminal device at cell edge uses two-step random access based on RSRP, then network delay is reduced, but random access failure rate increases due to inappropriate type selection
Solution Approach 1:
The patent changes the selection parameter from RSRP to position information (distance from reference point). This ensures that terminals select the appropriate random access type based on their actual location rather than signal strength, reducing random access failures while maintaining the benefits of two-step random access for low-latency scenarios.
Data Source
AI summary
Disclosed are a random access method and apparatus. The method comprises: acquiring configuration information of a network device; acquiring position information of same relative to a target device; and according to the configuration information and the position information, determining a random access type and initiating random access. According to configuration information of a network device and position information of same relative to a target device, a random access type is determined and random access is initiated. Accordingly, a terminal device selects, according to the configuration information and the position information, a suitable random access type for random access, thereby effectively guaranteeing the random access performance of the terminal device, improving the user experience, and solving the technical problem of poor random access performance.