Positioning method, method of reporting round-trip time

A loopback and time technology, applied in electrical components, wireless communication and other directions, can solve problems such as inability to accurately locate the UE and affecting the positioning accuracy.

Active Publication Date: 2011-05-04
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0011] Under wide coverage, for example, when the coverage of a cell is greater than 80 kilometers, although the NodeB can measure the distance greater than 80 kilometers, the maximum range of RTT measurement values ​​that can be represented by the RTT report value is about 80 kilometers, so when the UE When the distance from NodeB is 80 kilometers or more, the RTT report value can no longer accurately represent the RTT measurement value measured by NodeB, so that the UE cannot be accurately positioned, which affects the accuracy of positioning

Method used

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  • Positioning method, method of reporting round-trip time

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Embodiment Construction

[0057] The core idea of ​​the present invention is: set the loopback time reporting mapping table according to the coverage of the cell; after obtaining the loopback time measurement value, report the mapping table according to the set loopback time, map to obtain the corresponding loopback time report value, and report the loopback time report The value, and thus the representation range of the loopback time report value, can be flexibly adapted to changes in the size of the cell coverage.

[0058] In the introduction of the following embodiments, it is mainly introduced that the method for reporting the loopback time provided by the present invention is applied to the positioning of the user terminal under wide coverage. Of course, the method for reporting the loopback time provided by the present invention is not limited to the scenario of user terminal positioning under wide coverage.

[0059] The corresponding relationship between the loopback time measurement value and t...

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Abstract

This invention discloses a method for reporting round-trip time, which sets a round-trip time reporting mapping list based on wide covered local areas including: getting a round-trip time measurement value and getting corresponding round-trip time report value based on the preset mapping list to report the report value of said round-trip time. This invention also discloses a location method to realize the location to user devices under the wide cover, besides, this invention also discloses a device for reporting round-trip time.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a positioning method, a method and a device for reporting loopback time. Background technique [0002] The third generation joint working group (3GPP, 3 rd Generation Partnership Project) defines three positioning methods. Wherein, the cell identification (CellId) plus the round trip time (RTT, Round Trip Time) positioning technology to locate the user equipment (UE) is as follows: firstly, the radio network controller (RNC) initiates RTT measurement to the base station NodeB, and initiates to the UE The measurement of the time difference between sending and receiving Rx-Tx; then, the UE sends the measurement result of Rx-Tx T 0 Report to the RNC, and NodeB also reports the measurement result of RTT to the RNC at the same time; Finally, the RNC passes the formula (RTT-T 0 ) / 2 to obtain a circle with the NodeB as the center and the distance from the NodeB to the UE as the rad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/10H04W64/00
Inventor 赵建荣
Owner HUAWEI TECH CO LTD
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