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Method and device for up dedicated physics channel

A search method and a dedicated physical technology, applied in the field of communication, can solve the problem that the uplink DPCH channel cannot search for real multipath, and achieve the effect of improving accuracy

Inactive Publication Date: 2008-09-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides an uplink DPCH channel search method and device to solve the problem in the prior art that the corresponding uplink DPCH channel may not be able to search for real multipath due to transmission delay errors

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  • Method and device for up dedicated physics channel
  • Method and device for up dedicated physics channel
  • Method and device for up dedicated physics channel

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Embodiment Construction

[0028] In this embodiment, the present invention is mainly described by taking the uplink dedicated physical channel DPCH search under wide coverage (that is, the maximum cell coverage radius is greater than 60 km) as an example.

[0029] In the case of large sector / cell coverage in a WCDMA network, for example, a cell with a maximum radius of 180 kilometers, in order to meet the practical application of large sector coverage without changing the FP packet format, generally by changing the transmission The measurement accuracy (or "unit accuracy") of the time delay Tp is realized.

[0030] For a cell with a radius greater than 60 kilometers, the actual transmission delay of its physical random access channel may be much greater than 765 chips (chips), such as at 120 kilometers, 120*1000 / 78.125 (1chip=78.125 meters)=1536chips , at this time, the actual transmission delay can not be represented by 8 bits (Bit) using the quantized value 512 (1536 / 3) with a precision of 3. Theref...

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Abstract

The invention relates to an ascending special physical signal channel search method, for solving the problem that ascending DPCH signal channel can not find multi paths caused by the transmission time delay. Said method comprises: the base station obtains the transmission time delay value from the signal sent by wireless network controller; using said value as reference phase to shift forwards the preset code as the initial phase of search window to set the first search window; then setting the second and third search windows after and before the reference phase, to search multi paths in each window; when the multi paths are searched in the second or third windows but not in the first window, adjusting the phase of first window to make the multi paths enter into the first window, to search again. The invention also provides a relative base station.

Description

technical field [0001] The invention relates to a channel search technology in the communication field, in particular to a channel search method and device for an uplink dedicated physical channel DPCH. Background technique [0002] When the WCDMA system establishes an uplink dedicated channel, the radio network controller RNC can select and configure the corresponding dedicated channel (eg The dedicated channel is established for the first time, at this time, the dedicated channel works in the mode with Tp), or the Tp of the dedicated channel may not be configured (such as in the soft handover state, at this time, the dedicated channel works in the mode without Tp). The transmission delay represents the one-way transmission delay of the air interface, which is calculated by using the PRACH channel measurement. The Node B of the WCDMA base station transmits the Tp value to the RNC in the form of an FP packet. [0003] In the case of Tp, since the value range of Tp in the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/36H04Q7/38H04B1/707H04W74/08
Inventor 赵建荣
Owner HUAWEI TECH CO LTD
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