UTDOA Locating Using Beam Information for Accuracy
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Solution Overview
Problem
The existing Uplink Time Difference of Arrival (UTDOA) locating method in wireless communication technology faces limitations in accuracy and performance due to insufficient information exchange among base stations, location measurement units, and locating servers, which affects the precise location determination of user equipment.
Innovation Solution
The method involves transmitting UTDOA information requests and responses between serving base stations and locating servers, including beam information of reference signals, to configure and measure location reference signals, thereby improving the accuracy of user equipment location determination by assisting location measurement units in detecting the signals transmitted by the user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional UTDOA locating method is used without beam information, then the system complexity is low, but the locating accuracy is insufficient
Solution Approach 1:
The patent introduces beam information as an intermediary element that mediates between the existing UTDOA locating system and the user equipment. By incorporating beam direction and beam ID parameters into the measurement request and response messages, the system achieves higher locating accuracy without fundamentally redesigning the entire UTDOA architecture, thus resolving the contradiction between accuracy improvement and system complexity.
Solution Approach 2:
The patent enhances the existing UTDOA locating parameters by adding beam-related parameters (beam direction, beam ID) to the measurement request and response messages. This parameter expansion allows the locating server to obtain more comprehensive information about the reference signal transmission path, thereby improving locating accuracy while maintaining compatibility with the existing system framework.
2Measurement precision
If beam information is added to UTDOA locating, then locating accuracy improves, but information exchange complexity increases
Solution Approach 1:
The patent designs the beam information to serve multiple functions within the UTDOA locating process. The same beam direction and beam ID parameters are utilized for both signal transmission configuration and location calculation, eliminating the need for separate dedicated location parameters. This multi-functionality approach reduces the overall information exchange burden while still achieving enhanced locating accuracy.
Solution Approach 2:
The patent implements a feedback mechanism where the location measurement unit receives beam information in the measurement request, uses it to configure reference signal transmission, and then reports the measured UL RTOA along with the beam information in the measurement response. This feedback loop ensures that the locating server receives comprehensive information needed for accurate location calculation without requiring excessive preliminary information exchange.
3Measurement precision
If more measurement parameters are collected, then locating performance improves, but measurement time increases
Solution Approach 1:
The patent performs preliminary configuration of the reference signal transmission parameters based on the beam information received in the measurement request. By pre-configuring the transmission parameters (beam direction, beam ID) before the actual measurement, the location measurement unit can efficiently conduct the measurement without time-consuming real-time calculations, thus improving locating performance while minimizing measurement time.
Data Source
AI summary
Disclosed in the present application are a locating method for an uplink time difference of arrival, and an apparatus thereof. The method comprises: a locating server transmits a UTDOA information request message to a serving base station of a target terminal; the locating server receives a UTDOA information response message sent by the serving base station, wherein the UTDOA information response message carries configuration information of a locating reference signal and beam information of a reference signal related the a target terminal; the locating server transmits a measurement information request message to a location measurement unit, wherein the measurement information request message carries auxiliary locating information, the auxiliary locating information comprises the beam information of the reference signal related to the target terminal, or comprises relative information between a transmitting beam of the locating reference signal determined according to the beam information of the reference signal related to the target terminal and a received beam used by the location measurement unit, so that the location measurement unit and the locating server can assist in locating by using the beam information.