NTN Positioning Signal Resource Configuration for Satellite Networks
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Solution Overview
Problem
Existing positioning technologies, primarily designed for terrestrial networks, are not applicable to non-terrestrial networks (NTN) such as satellite communications, due to differences in signal propagation and synchronization requirements.
Innovation Solution
A wireless communication method for positioning that involves receiving configuration information to determine M downlink and/or N uplink positioning signal resources, and reporting measurement information including time differences, to enable accurate positioning in NTN systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terrestrial-based positioning technologies are used, then positioning can be implemented in traditional mobile networks, but they are not applicable to non-terrestrial networks (NTN) such as satellite communications
Solution Approach 1:
The patent modifies positioning parameters specifically for NTN environments, including adjusting time difference of arrival (TDOA) measurement parameters, signal resource configuration parameters, and synchronization parameters to account for satellite communication characteristics such as longer propagation delays and Doppler effects, thereby enabling accurate positioning in NTN systems
Solution Approach 2:
The patent divides the positioning system into separate terrestrial and NTN modes, with dedicated positioning signal resources and measurement procedures for each mode. The network can selectively activate NTN-specific positioning configurations when satellite communication is detected, ensuring reliable positioning accuracy adapted to the specific propagation characteristics of each environment
2Measurement precision
If M downlink and N uplink positioning signal resources are configured for NTN positioning, then positioning precision in NTN systems is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent configures positioning signal resources selectively based on the operating mode. In NTN mode, additional downlink positioning reference signals (DL-PRS) and uplink sounding reference signals (SRS) are configured beyond standard terrestrial requirements to achieve necessary positioning precision. The network dynamically adjusts the number of configured resources (M and N) based on positioning accuracy requirements and satellite geometry, avoiding unnecessary complexity when NTN positioning is not needed
3Measurement precision
If time difference measurements are reported for positioning calculation, then positioning accuracy is improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent performs preliminary configuration of positioning signal resources and measurement parameters before actual positioning measurements. The network pre-configures DL-PRS resources, SRS resources, and measurement timing configurations in advance, allowing terminal devices to efficiently perform time difference measurements without extensive real-time negotiation. This reduces the time loss associated with dynamic resource allocation while maintaining positioning accuracy through pre-optimized measurement configurations
Data Source
AI summary
A wireless communication method for positioning, applicable to a terminal device, is provided. The method includes: receiving first configuration information, wherein the first configuration information is used for determining M downlink positioning signal resources and/or N uplink positioning signal resources, wherein M and N are positive integers; and reporting first measurement information based on the first configuration information, wherein the first measurement information includes at least one of a first time difference or first time information.