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Wireless communication terminal, communication control method of wireless communication terminal, and wireless communication system

  • US 8,369,849 B2
  • Filed: 09/28/2007
  • Issued: 02/05/2013
  • Est. Priority Date: 09/28/2006
  • Status: Active Grant
First Claim
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1. A wireless communication terminal comprising:

  • a communication part capable of acquiring a plurality of communication systems and capable of both communication by a first communication protocol and communication by a second communication protocol;

    an operation part; and

    a control part which controls communication by the communication part by any of the plurality of communication systems using the first communication protocol or second communication protocol when the start of communication is instructed by the operation part,the control part having;

    a communication system selection part instructing the communication part of the communication system to be acquired,a first protocol execution part instructing the communication part of acquisition by the first communication protocol,a second protocol execution part instructing the communication part of acquisition by the second communication protocol, andan acquisition instruction function execution part instructing the communication system selection part of the start of acquisition of the communication system, whereinthe acquisition instruction function execution part sends to the communication system selection part, a first acquisition instruction instructing the acquisition of any of the plurality of communication systems when detecting a send operation by the operation part in a state judged “

    out of area”

    in which communication cannot be carried out, sends to the communication system selection part a second acquisition instruction when acquisition failure is informed for the first acquisition instruction, and performs processing for starting communication by a successful acquired communication system when acquisition success is informed for the first acquisition instruction or the second acquisition instruction,the communication system selection partmakes the first protocol execution part perform the acquisition processing according to the first acquisition instruction for each of the plurality of communication systems until the acquisition is successful, informs the acquisition instruction function execution part that the acquisition failed when acquisition failed in all of the communication systems, and informs the acquisition instruction function execution part that the acquisition was successful when the acquisition was successful in any communication system, andmakes the second protocol execution part perform the acquisition processing according to the second acquisition instruction for each of said plurality of communication systems until the acquisition is successful, informs the acquisition instruction function execution part of the acquisition failure when acquisition failed in all communication systems, and informs the acquisition instruction function execution part of the acquisition success when the acquisition is successful in any communication system, andthe acquisition instruction function execution part judges if there was any notification of acquisition failure when a first predetermined time passes from when the first acquisition instruction was carried out and judges if there was any notification of acquisition failure by a cycle of a second predetermined time shorter than the first predetermined time when acquisition failure is not informed.

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