COMMUNICATION SYSTEM, MOBILE DEVICE, AND SWITCHING CONTROL METHOD

Title:

COMMUNICATION SYSTEM, MOBILE DEVICE, AND SWITCHING CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2012/102106

Kind Code:

A1

Abstract:

Provided are a communication system, a mobile device, and a switching control method which effectively limit connection delays caused while a cell search is carried out when switching is performed to a wireless communication system having different wireless access technology (RAT), without the capacity of the mobile device being acquired by the core network. A UE (300) can connect to a first wireless communication system and a second wireless communication system that is different to the first wireless communication system and uses a plurality of frequency bands. When the UE (300) switches from the first wireless communication system to the second wireless communication system, receives an RRC CONNECTION REJECT indicating a plurality of switching destination frequencies included in the frequency bands used by the second wireless communication system, and unavailable frequencies at which the UE (300) cannot perform transmission or reception are included in the plurality of switching destination frequencies, the UE (300) searches only cells having a switching destination frequency from the plurality of switching destination frequencies excluding the unavailable frequencies.

Inventors:

NAKAMURA YUICHIRO
AOYAGI KENICHIRO
MATSUTANI HIDEYUKI

Application Number:

PCT/JP2012/050666

Publication Date:

August 02, 2012

Filing Date:

January 16, 2012

Export Citation:

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Assignee:

NTT DOCOMO INC (JP)
NAKAMURA YUICHIRO
AOYAGI KENICHIRO
MATSUTANI HIDEYUKI

International Classes:

H04W36/14; H04W36/00; H04W88/06

Foreign References:

JP2008118204A	2008-05-22
JP2009296535A	2009-12-17
JP2005260486A	2005-09-22
JP2011015735A	2011-01-27

Other References: