摘要:
A method and apparatus for maintaining communications between a mobile computer and a mobile subscriber unit is disclosed. The method and apparatus comprise determining whether a connection is available between the mobile subscriber unit and a radio communications system. If a connection is available, then the method and apparatus include retrieving a first IP address for the mobile computer from the radio communications system. Then, the method and apparatus comprise caching the first IP address in the mobile subscriber unit for use by the mobile computer. Finally, the method and apparatus include utilizing the first IP address even if the radio communications system is unavailable and updating the first IP address with a second IP address obtained from the radio communications system when the radio communications system is available.
摘要:
An expandable text messaging service protocol for use with a two-way radio transceiver includes an extension bit field for creating an expandable header for controlling the overall size of data packets used for communicating message traffic. The protocol further includes a control bit field for designing the message as a control message or user message and a protocol data unit (PDU) type field for identifying the message type. A payload field may further be used for carrying message content.
摘要:
An expandable text messaging service protocol for use with a two-way radio transceiver includes an extension bit field for creating an expandable header for controlling the overall size of data packets used for communicating message traffic. The protocol further includes a control bit field for designing the message as a control message or user message and a protocol data unit (PDU) type field for identifying the message type. A payload field may further be used for carrying message content.