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Inter-system handoff between wireless communication networks of different radio access technologies

A technology of wireless communication network and radio access, which is applied in the field of communication and can solve problems such as the terms of handover that have not yet been elaborated

Inactive Publication Date: 2006-12-27
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regrettably, 3GPP and 3GPP2 have not yet elaborated the terms for implementing handover from W-CDMA system to cdma2000 system

Method used

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  • Inter-system handoff between wireless communication networks of different radio access technologies
  • Inter-system handoff between wireless communication networks of different radio access technologies
  • Inter-system handoff between wireless communication networks of different radio access technologies

Examples

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Embodiment Construction

[0024] As used herein, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation or design termed "example" herein is not necessarily to be construed as better or advantageous over other implementations or designs.

[0025] The inter-system handover technology described herein can be used in various wireless communication systems and networks. A network usually refers to a system deployment, although the two terms are often used interchangeably. Handover and handover, which are also generic terms, refer to the transfer or handover of a wireless device from one network controller to another. For clarity, these techniques are specifically illustrated for handover from a UTRAN to a cdma2000 RAN. In the following description, UMTS generically refers to the technology described by 3GPP, and cdma2000 generically refers to the technology described by 3GPP2.

[0026] figure 1 A deployment including a UTRAN 110 and a cdma2000 RAN 12...

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PUM

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Abstract

Various schemes for performing inter-system handoff, e.g., from a UTRAN to a cdma2000 radio access network (RAN) are described. For a MAHHO scheme, the UTRAN uses measurements obtained by a multi-RAT device to determine suitable cdma2000 cell(s) for handover. The measurements are obtained by a candidate frequency search procedure, and the handover is accomplished by a handoff execution procedure. For a MDHHO scheme, the UTRAN relies on location information for the multi-RAT device to select suitable cdma2000 cell(s) for handover. For a CRHHO scheme, a new call is established on the cdma2000 RAN and the pending call on the UTRAN is released in a manner such that the handover appears seamless to the multi-RAT device. The multi-RAT device includes two modem processors that perform processing for the UTRAN and cdma2000 RAN and an application processor that controls the modem processors.

Description

[0001] Related Application Cross Reference [0002] This application claims the benefit of Provisional US Application No. 60 / 508,452, filed October 2, 2003, and entitled "Inter-System Handoff Procedures." technical field [0003] The present disclosure relates generally to communications, and more particularly to techniques for intersystem handoff of a wireless device between two wireless communication networks that are different radio access technologies. Background technique [0004] Wireless communication systems are widely used to provide various communication services such as voice, packet data, and the like. These systems may be multiple access systems capable of supporting multiple users by sharing available system resources. Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, and Frequency Division Multiple Access (FDMA) systems. A CDMA system may implement a Radio Access Techn...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04L12/56H04W36/14H04W36/30
Inventor 维耶里·万吉菲利普·肯尼斯·普赖斯
Owner QUALCOMM INC
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