AOD Determination via Phase Information in LTE and NR Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in LTE and NR networks, the angle of departure (AOD) cannot be effectively obtained, which is crucial for determining the relative position between devices in the ranging field.
Innovation Solution
A method and apparatus that involve sending angle measuring signals to a receiving terminal at various positions, receiving corresponding phase information, and calculating the AOD based on this phase information, allowing for the determination of the sending terminal's AOD in LTE and NR networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ranging methods are used in LTE and NR networks, then communication functionality is maintained, but the angle of departure (AOD) cannot be obtained
Solution Approach 1:
The patent introduces phase information as an intermediary parameter to indirectly obtain AOD. Instead of directly measuring AOD which would require complex angle measurement mechanisms, the system measures phase differences of signals received at multiple antennas and uses these phase differences to calculate AOD through mathematical relationships, thereby achieving angle measurement without direct angle sensing hardware
Solution Approach 2:
The patent replaces direct mechanical or hardware-based angle measurement systems with a signal processing-based approach. By using phase information extraction and mathematical calculation (arccos function) to determine AOD, the system substitutes complex physical angle measurement mechanisms with electromagnetic signal analysis and computational methods
2Loss of information
If angle measuring signals are sent at various positions to determine AOD, then relative position determination capability is improved, but signal transmission and processing overhead increases
Solution Approach 1:
The patent makes the angle measuring signals multi-functional by designing them to serve both as communication signals for maintaining link connectivity and as measurement signals for extracting phase information to determine AOD. This dual functionality allows the system to obtain position information without requiring separate dedicated measurement signals, thereby reducing overall signal overhead
Solution Approach 2:
The patent merges the angle measurement function with existing communication signal transmission. By combining AOD measurement objectives with regular uplink signal transmission, the system extracts phase information from signals that would be transmitted anyway, eliminating the need for additional separate measurement signal transmissions and reducing total signal overhead
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the accurate determination of the angle of departure in various communication networks, enhancing the ability to determine relative positions between devices and supporting communication in LTE and NR systems.
Implementation Method 1
sending angle measuring signals to a receiving terminal at various sending positions; receiving corresponding phase information of the angle measuring signals
Data Source
AI summary
A method for obtaining an angle of departure (AOD) of a terminal, comprising: angle measuring signals are sent to a receiving terminal at a plurality of sending positions; corresponding phase information of the angle measuring signals, sent by the receiving terminal, of the plurality of sending positions is received; and the AOD of the sending terminal is obtained according to the phase information of the angle measuring signals.