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Uplink synchronization method when the rrc state of ue in wcdma direction finding system is fach state

A direction finding system and line synchronization technology, which is applied in the direction of synchronization devices, wireless communications, electrical components, etc., to reduce the amount of calculation and improve the effect of operating distance

Active Publication Date: 2019-08-09
GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the uplink measurement problem in the prior art when the RRC state of the UE is FACH, and to provide an RRC (Radio Resource Control) of the UE in a WCDMA (Wideband Code Division Multiple Access) direction finding system. ) Uplink synchronization method when the status is FACH (Forward Access Channel)

Method used

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  • Uplink synchronization method when the rrc state of ue in wcdma direction finding system is fach state
  • Uplink synchronization method when the rrc state of ue in wcdma direction finding system is fach state
  • Uplink synchronization method when the rrc state of ue in wcdma direction finding system is fach state

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Embodiment

[0044] This embodiment provides a method for uplink synchronization when the RRC state of the UE is FACH in a third-party WCDMA direction finding system.

[0045] The process includes: 1. Downlink AICH detection; 2. Uplink synchronization of the target according to the detection result.

[0046] Identify the UE in the RRC CONNECTION SETUP signaling carried by the downlink common channel. If the RRC state of the UE is FACH, continue the downlink AICH detection, and then perform uplink synchronization according to the AICH detection result.

[0047]In the synchronization process, frequency synchronization is first performed according to the configuration, and then time domain synchronization is performed, wherein the time domain synchronization uses uplink data at different times according to each different AICH detection time. Use the local sequence (corresponding to the signature sequence detected by AICH) to perform sliding correlation calculation with the received sequence t...

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Abstract

The present invention discloses an uplink synchronization method for a WCDMA direction-finding system with an RRC state of UE being an FACH state. The method comprises: performing downlink AICH detection, and performing uplink synchronization on a target according to a detection result; identifying UE in RRC CONNECTION SETUP signaling borne by a downlink common channel, and if an RRC state of the UE is FACH, continuing with the downlink AICH detection, and performing the uplink synchronization according to an AICH detection result; during synchronization, performing frequency synchronization according to a configuration first, and then performing time domain synchronization, wherein during the time domain synchronization, uplink data of different times is used according to different AICH detection times; and using a local sequence and a received sequence to perform a sliding correlation calculation to obtain a data synchronization point, then performing data demodulation to obtain a UE-ID, and finally determining, according to a UE-ID result, whether a signal is a signal from the target and reporting energy.

Description

technical field [0001] The invention relates to the technical field of wireless mobile communication, in particular to an uplink synchronization method when the RRC state of the UE is the FACH state in a WCDMA direction finding system. Background technique [0002] In a wireless communication system, a terminal device and a base station device communicate using wireless signals according to an agreed protocol. The third-party direction finding system is different from terminal equipment and base station equipment. It is a mobile device that can receive uplink signals (signals sent by the terminal to the base station) and downlink signals (signals sent by the base station to the terminal) at the same time. Its role It is to capture the uplink wireless signal of a specific terminal in the air interface, so as to estimate its transmit power. [0003] In the third-party direction finding system, the UE signal must be identified first in the downlink wireless signal, and then th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCH04W56/0005
Inventor 付磊
Owner GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD