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Techniques for supporting GSM to W-CDMA reselection

A W-CDMA, reselection technology, applied in the field of communication, can solve the problem of dual-mode terminals not knowing the W-CDMA cell, staying, etc.

Inactive Publication Date: 2009-06-17
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These GSM networks cannot broadcast information to neighboring W-CDMA cells in the manner defined in the 99 edition of the GSM standard
A dual-mode terminal operating in a "pre-1999" GSM network (i.e., a network that supports versions earlier than 99) may not be aware of neighboring W-CDMA cells and may thus "stuck" on the GSM network

Method used

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  • Techniques for supporting GSM to W-CDMA reselection
  • Techniques for supporting GSM to W-CDMA reselection
  • Techniques for supporting GSM to W-CDMA reselection

Examples

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Embodiment Construction

[0021] The word "exemplary" is used herein to mean "serving as an example, illustration, or illustration." Any implementation or design described herein as "exemplary" is not necessarily preferred or advantageous over other implementations or designs.

[0022] Figure 1A Shown is a schematic diagram of a Public Land Mobile Network (PLMN) 100a comprising a GSM / EDGE Radio Access Network (GERAN) 110a and a Universal Terrestrial Radio Access Network (UTRAN) 120a. GERAN 110a is a GSM network, and in this embodiment, the network supports version 99 or later of the GSM standard. UTRAN 120a is a W-CDMA network, and in this embodiment, the network supports W-CDMA standard version 99 or later. (The 1999 edition is the first version of the W-CDMA standard.) For simplicity, from Figures 1A to 1C In , the symbol "99 edition" indicates the application standard of the 99 edition or later, and the symbol "before 99 edition" indicates the version of the standard earlier than the 99 edition...

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Abstract

The invention discloses a technology supporting cell reselection from GSM to W-CDMA. A dual-mode terminal determines whether a currently camped-on GSM network supports Release 99 functionality, and thus whether the GSM network can broadcast information for W-CDMA neighboring cells. This determination may be made based on the setting of a certain status bit in a message transmitted by the GSM network and / or other information available to the terminal. If the current GSM network is deemed not to support Release 99 functionality, the terminal can initiate a search for a WCDMA cell. The terminal may also determine the scope of the W-CDMA search and when to perform the W-CDMA search based on information stored by the terminal. Cell reselection from GSM to W-CDMA can be done based on measurements obtained from the W-CDMA search and other relevant information (eg thresholds for comparing measurements).

Description

[0001] related application [0002] This application claims the benefit of Provisional U.S. Application No. 60 / 431322, filed December 6, 2002, entitled "Techniques for Supporting GSM to WCDMA Reselection," assigned to the assignee of this application, and It is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to communications, and more particularly to techniques for supporting GSM to W-CDMA reselection. Background technique [0004] Wireless communication systems are widely used to provide different types of services such as voice, packet data, and so on. These systems may be multiple-access systems capable of supporting communication for multiple users by sharing available system resources. Examples of such multiple-access systems include Time Division Multiple Access (TDMA) systems and Code Division Multiple Access (CDMA) systems. A TDMA system may implement one or more standards such as Global System fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/14
Inventor K·W·亚伯拉罕森M·K·斯帕尔兹
Owner QUALCOMM INC