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Mobile wireless electric terminal and wireless electric communication method

一种无线电终端、无线电基站的技术，应用在移动无线电终端领域，能够解决长时间转换CDMA通信系统、不支持1xTT等问题

Inactive Publication Date: 2010-08-04
FUJITSU TOSHIBA MOBILE COMM LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, in this process, 1xTT is not supported under the current 3GPP standard
[0008] A conventional mobile radio terminal corresponding to a plurality of communication systems has a problem that it takes a long time to switch to a CDMA communication system under an instruction from an LTE communication system

Method used

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  • Mobile wireless electric terminal and wireless electric communication method
  • Mobile wireless electric terminal and wireless electric communication method
  • Mobile wireless electric terminal and wireless electric communication method

Examples

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Embodiment Construction

[0029] Embodiments of the present invention will be described below with reference to the drawings.

[0030] Embodiments of the invention relate to a mobile radio terminal UE, ie a mobile station. A mobile radio terminal UE is capable of performing communication in two or more different radio connection modes.

[0031] In the following description, for example, the mobile radio terminal UE corresponds to 2 radio connection modes, CDMA2000 1x mode (hereinafter referred to as 1x mode) and LTE (Long Term Evolution) mode.

[0032] The 1x mode can provide voice communication service and low-speed packet communication service at 100kbps or lower. On the other hand, the LTE mode provides a high-speed packet service at about 2Mbps to 20Mbps through a packet switching connection, and is also capable of providing a voice communication service through VoIP (Voice over Internet Protocol).

[0033] In each mode, different usable frequencies are determined from each other, which are defin...

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PUM

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Abstract

A mobile radio terminal UE performs starting PNG, detecting a best cell, and starting generation of Long Code and receives various types of messages from a 1xRTT CS Access on the basis of System Information supplied from an E-UTRAN.

Description

technical field [0001] The present invention relates to mobile radio terminals for eg mobile bodies. Background technique [0002] In radio communication systems such as mobile phone systems and wireless LANs, OFDMA (Orthogonal Frequency Division Multiple Access) and CDMA (Code Division Multiple Access) are employed as communication schemes. OFDM (Orthogonal Frequency Division Multiplexing) can be used to prevent interference or disturbance, and thus has attracted attention. [0003] In 3GPP LTE (Long Term Evolution) using OFDM (see, eg Erik Dahlman, "Academic Press", 2007, pp. 277-369, 3GPP TS23.401, 3GPP TS23.402, 3GPP TS36.300), the All data is handled as packets, and a packet communication scheme using VoIP (Voice over IP) is used for voice communication. [0004] However, in 3GPP LTE, voice communication based on the circuit switching system already adopted in the 2G / 3G system is not fully used, but 2G / 3G using the existing circuit switching system is studied when tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W88/08H04J13/00H04W48/18H04W68/12
CPCH04W88/06H04W36/0022H04W36/00224
Inventor 饭盛英二
Owner FUJITSU TOSHIBA MOBILE COMM LTD
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