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Communication system, and communication device and communication method for use in the communication system

  • US 6,901,275 B1
  • Filed: 09/01/2000
  • Issued: 05/31/2005
  • Est. Priority Date: 09/30/1999
  • Status: Expired due to Fees
First Claim
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1. A communication system having a first device for performing communication in a first communication form that consumes a predetermined power and a second device for performing communication in a second communication form that consumes a smaller power than the first device, wherein the first and second communication forms are performed in the same network, for performing data communication between the first device and the second device, comprising:

  • means for judging a timing for switching the communication form between the first device and the second device; and

    means for switching the communication form of the first device from the first communication form to the second communication form and switching the communication form of the second device from the second communication form to the first communication form, when said judging means judges that it is the switching timing.

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