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Title:
RADIO TERMINAL APPARATUS AND RADIO NETWORK SYSTEM
Document Type and Number:
Japanese Patent JP2010050898
Kind Code:
A
Abstract:

To improve the continuity of communication service in handover between different kinds of networks.

The radio terminal apparatus 1 obtains, based on a beacon signal transmitted from a base station 2 of a radio network system; information associated with a communication environment when it is connected with the radio network system via the base station 2, and stores the communication environment information in the observation database 13, and further transmits communication environment information in the observation database 13 to a basestation 2 (AP-c) during connection. The radio terminal apparatus 1 obtains communication environment information associated with an adjacent base station from the base station 2 (AP-c) during connection in handover request generation and determines a base station that is a handover destination candidate based on the obtained communication environment information and the communication environment information in the observation database 13.


Inventors:
FUJISAWA TOSHIYUKI
INAMURA KATSUKI
TANAKA TOSHIAKI
Application Number:
JP2008215469A
Publication Date:
March 04, 2010
Filing Date:
August 25, 2008
Export Citation:
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Assignee:
KDDI CORP
JAPAN BROADCASTING CORP
International Classes:
H04W36/36; H04W36/14; H04W36/26; H04W36/30; H04W48/16; H04W88/06
Domestic Patent References:
JP2003259433A2003-09-12
JP2007143165A2007-06-07
JP2009508363A2009-02-26
JP2005269109A2005-09-29
Foreign References:
WO2007029881A22007-03-15
Attorney, Agent or Firm:
Masatake Shiga



 
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