Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for obtaining initial connection frame number in WCDMA mobile communication system

A mobile communication system, broadband code division multiple access technology, applied in the field of acquisition of the initial connection frame number in the broadband code division multiple access mobile communication system, can solve problems such as synchronization failure and inability to process

Inactive Publication Date: 2005-09-07
HUAWEI TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for obtaining the initial connection frame number in a wideband code division multiple access mobile communication system, which can solve the problem of the user terminal (UE) for some special default dedicated physical channel offset values ​​DOFF and cell System frame number SFN When the UE transitions from other states to CELL_DCH state, the initial connection frame number CFN directly uses the CFN calculation formula of the 25.331 radio resource management control protocol, which cannot handle SFN-(DOFF div 38400) being a negative number, which causes UE and NODB to fail to synchronize question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for obtaining initial connection frame number in WCDMA mobile communication system
  • Method for obtaining initial connection frame number in WCDMA mobile communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] figure 1 Is the flow chart of the embodiment of the method of the present invention. according to figure 1 , when acquiring the initial connection frame number, first input the state of the user terminal (UE), the system frame number SFN of the target cell identified by the first radio link in the downlink radio link list, and the default dedicated physical channel in step 1 Offset value DOFF; then determine in step 2 whether the state of the UE is the first time to migrate from other states to the cell-dedicated channel state (CELL_DCH) state, or perform a hard handover from other systems to the third-generation universal terrestrial wireless access system (UTRAN), or perform hard handover in the cell dedicated channel (CELL_DCH) state, and the timing indication message "Timingindication" received by the UE is reinitialization "initialise", if it is...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention discloses a method for getting initial CFN of FDD mode in WCDMA system, which is to input status of a user terminal first, a first radio link identification target area SFN in downstream radio link list and DOFF. When UEE transfers to CELL-DCH status form other status firstly or hardly switches to UTRAN from other system, or carries out hard switch at CELL-DCH status and UE gets an reinitialization of a timing instruction, it computes Doff To Frame=DOFF div38400, determines CFN to be(SFN+4096-Doff To Frame) mod256 when SFN-Foff To Frame is smaller than 0, or determines CFN to be (SFN-Doff To frame) mod256 which can solve the initial synchronization for UE and the base station.

Description

technical field [0001] The invention relates to a user terminal (UE) of a wideband code division multiple access mobile communication system (WCDMA) switching to a cell dedicated channel state (CELL_DCH) state and a synchronization mechanism for transmitting a channel in the CELL_DCH state, and specifically relates to a UE in front of a cell A method for obtaining the initial connection frame number (CFN) when transitioning to the access state (CELL_FACH) or the cell paging state (CELL_PCH) state to the CELL_DCH state and performing hard handover in the CELL_DCH state. Background technique [0002] In the WCDMA system, according to the 3GPP 25.331 radio resource management control protocol in March 2002, the value of the user terminal (UE) in the CELL_FACH or CELL_PCH state of all common and shared channel initialization connection frame numbers (CFN) is the cell system frame number ( SFN) current value. The CFN value of the paging channel (PCH) is accumulated by 1 for each...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/14H04B7/26H04W56/00
Inventor 罗新龙陈德
Owner HUAWEI TECH CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com