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Metering reporting method for loop time of radio link

A wireless link, measurement reporting technology, applied in radio wave measurement system, radio/inductive link selection arrangement, measurement device, etc., can solve problems affecting positioning accuracy and achieve the effect of ensuring accuracy and positioning accuracy

Inactive Publication Date: 2006-11-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The present invention provides a method for measuring and reporting the loopback time (RTT) of a wireless link, which is used to solve the problem in the prior art that RTT is calculated by using a virtual path, which affects the positioning accuracy

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  • Metering reporting method for loop time of radio link
  • Metering reporting method for loop time of radio link
  • Metering reporting method for loop time of radio link

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Embodiment Construction

[0038] In order to avoid the problem of inaccurate calculation results caused by the use of imaginary paths when RTT calculations are performed using the multipath with the minimum phase in the multipath information in the prior art, the present invention only selects The phase minimum multipath whose energy is greater than the set energy threshold performs RTT calculation. The specific method is: calculate the energy of each multipath found, and compare it with a set energy threshold value, and screen out the multipath whose energy is greater than the set threshold; then compare the phases of all the multipaths that have been screened out , select the multipath with the smallest phase for RTT calculation. In order to further ensure the validity of the RTT measurement value, a threshold value of the signal frame containing the multipath in a measurement period can be set, and the RTT measurement value reported in the measurement period with the number of frames less than the t...

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Abstract

The invention involves a kind of loop time (RTT) measurement reporting method on a wireless link, including : A. A wireless network controller sends RTT measurement information to the base station; B. The base station searches current multi-path information to find out the minimum phase multi-path with the energy exceeding the set threshold value then to calculate its RTT value; C. The base station determines whether the RTT measurement period is completed or not, if not, it transfers to steps B, otherwise, steps D is implemented; D. Calculating an average value of all the calculated RTT values to report them to the wireless network controller as RTT measured value in the RTT measurement period.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for measuring and reporting round trip time (Round TripTime, RTT) of a wireless link. Background technique [0002] 3GPP mainly defines three positioning technologies for wireless terminals in the network, one of which is a positioning method based on CellId (cell identification). In order to improve the positioning accuracy, for FDD (Frequency Division Duplex, frequency division multiplexing) mode, it The RTT measurement of the radio link is initiated by the radio network controller (RNC) to the NodeB (base station). [0003] like figure 1 As shown, it is a schematic diagram of UE (User Equipment, user equipment) positioning based on CellId+RTT. Wherein, the oval area is the coverage area of ​​the cell, the small black square is the position of the NodeB, and the dotted line is the UE position ring determined by the RTT information. If only the CellId in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38G01S5/14H04W24/10
Inventor 孙旭生
Owner HUAWEI TECH CO LTD