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Method and apparatus for supporting the delivery of short message service messages to sleeping mobile stations in a cellular communications system

  • US 5,797,094 A
  • Filed: 06/26/1997
  • Issued: 08/18/1998
  • Est. Priority Date: 05/23/1995
  • Status: Expired due to Term
First Claim
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1. A radio communications system, comprising:

  • a plurality of mobile stations, each mobile station including means for temporarily placing the mobile station in a power conservation mode of operation wherein receipt of communications messages is not possible, and for generating a notification informing the system that the mobile station has terminated its power conservation mode of operation;

    a communications network for delivering received communications messages to the plurality of mobile stations, said network including;

    a message center node for storing received communications messages intended for delivery to the mobile stations;

    another network node connected to the message center node for setting a message flag indicating the storage of a received communications message for a designated one of the mobile stations when delivery of the communications message to the designated mobile station by the communications network fails; and

    means responsive to both the mobile station notification of the termination of the power conservation mode of operation in the designated mobile station and the setting of the message flag for retrieving and forwarding the stored communications message for delivery to the designated mobile station.

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