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
CN102186191AInactive Publication Date: 2011-09-14CHINA ACAD OF TELECOMM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA ACAD OF TELECOMM TECH
Publication Date
2011-09-14
Estimated Expiration
Not applicable · inactive patent

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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.
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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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