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Methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and system

A technology of OTDOA and auxiliary data, applied in electrical components, wireless communication and other directions, can solve problems such as OTDOA positioning failure

Inactive Publication Date: 2011-09-14
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0035] Embodiments of the present invention provide a method, system, and device for transmitting OTDOA measurement and positioning assistance data, which are used to solve the problem of OTDOA positioning failure due to the inability of UE to perform OTDOA measurement

Method used

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  • Methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and system
  • Methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and system
  • Methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] like Figure 5 As shown, the specific process is as follows:

[0091] Step 1: UE obtains OTDOA auxiliary data from E-SMLC. Specifically, UE sends positioning request to MME, MME sends positioning request to E-SMLC, E-SMLC selects OTDOA positioning method, and sends UE carrying OTDOA auxiliary data The LPP provides assistance data messages;

[0092] Step 2: The terminal determines that the signal of the OTDOA measurement cell indicated by the OTDOA assistance data cannot be detected;

[0093] Step 3: The terminal sends an error indication message to the E-SMLC through the LPP, which carries the information that the OTDOA measurement cell cannot be detected and the list of cells where the terminal can detect the signal.

[0094] Specifically, the ASN.1 form of the error indication message is defined as follows:

[0095]

[0096]

[0097] It includes common error information (commonIEsError), external protocol data unit sequence number (EPDU-Sequence), etc. The nu...

Embodiment 2

[0102] like Figure 5 As shown, the specific process is as follows:

[0103] Step 1: UE obtains OTDOA auxiliary data from E-SMLC. Specifically, UE sends positioning request to MME, MME sends positioning request to E-SMLC, E-SMLC selects OTDOA positioning method, and sends UE carrying OTDOA auxiliary data The LPP provides assistance data messages;

[0104] Step 2: The terminal determines that the signal of the OTDOA measurement cell indicated by the OTDOA assistance data cannot be detected;

[0105] Step 3: The terminal sends an abnormal interruption message to the E-SMLC through the LPP, which carries the information that the OTDOA measurement cell cannot be detected and the list of cells that the terminal can detect the signal.

[0106] Specifically, the ASN.1 definition of the abnormal interrupt message is as follows:

[0107]

[0108]

[0109] It includes common interrupt information (commonIEsAbort), external protocol data unit sequence number (EPDU-Sequence), etc...

Embodiment 3

[0114] Step 1: UE obtains OTDOA auxiliary data from E-SMLC. Specifically, UE sends positioning request to MME, MME sends positioning request to E-SMLC, E-SMLC selects OTDOA positioning method, and sends UE carrying OTDOA auxiliary data The LPP provides assistance data messages;

[0115] Step 2: The terminal determines that the signal of the OTDOA measurement cell indicated by the OTDOA assistance data cannot be detected;

[0116] Step 3: The terminal resends the assistance data request message to the E-SMLC through the LPP, which carries information about cells that cannot be detected by OTDOA measurement and a list of cells that the terminal can detect signals.

[0117] Specifically, the ASN.1 definition of the assistance data request message is as follows:

[0118]

[0119]

[0120] It includes public request assistance data information (commonIEsRequestAssistanceData), which method of data request can be selected, such as OTDOA, etc., the auxiliary data requested by ...

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Abstract

The embodiment of the invention discloses methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and a system, relating to the technical field of wireless communications. The methods, devices and system are used for solving the problem of failure of OTDOA positioning because UE can not carry out OTDOA measurement. The methods comprise the following steps that: the UE determines the cells which can detect the signals self and sends the information of the cells to a positioning server according to the determination result; the positioning server selects the OTDOA measurement cells for the UE according to the information of the cells and sends the OTDOA assistance data including the information of the OTDOA measurement cells to the UE; and the UE carries out OTDOA measurement according to the OTDOA assistance data. By adopting the methods, devices and system, the possibility of failure of OTDOA positioning can be reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an OTDOA measurement and positioning auxiliary data transmission method, system and device. Background technique [0002] In the Universal Mobile Telecommunications System (UMTS), the observed time difference (OTDOA) method is mainly based on the measurement results of the system observed time difference type 2 (SFN-SFN observed time difference type 2), and can refer to the first path type ( First Path Type), downlink pilot time slot received signal strength (RSS on DwPTS) and terminal related speed (UE Related Speed) measurement results to estimate the location of the terminal (UE). These measurement results can be used to effectively estimate the location of the UE in combination with the results of the actual drive test and network planning. The measurement accuracy of this method depends on the number of measurable cells, measurement cycle, measurement accuracy ...

Claims

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Application Information

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IPC IPC(8): H04W24/00H04W64/00
Inventor 全海洋傅婧贾贝贝李国庆
Owner CHINA ACAD OF TELECOMM TECH
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