Mobile wireless electric terminal and wireless electric communication method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJITSU TOSHIBA MOBILE COMM LTD
- Publication Date
- 2010-08-04
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
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...