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Modular, portable data processing terminal for use in a radio frequency communication network

  • US 7,853,254 B2
  • Filed: 06/03/2008
  • Issued: 12/14/2010
  • Est. Priority Date: 08/31/1993
  • Status: Expired due to Fees
First Claim
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1. A base module for use in a portable terminal utilizing a communication protocol stack having higher layers and at least one lower layer, the portable terminal also comprising a communication module having a wireless receiver and operable to perform the functionality of at least one lower layer of the communication protocol stack, the base module comprising:

  • a base memory operable to store the higher layers of the communication protocol stack; and

    a base processor operable to cooperate with the communication module to effect wireless communication by the communication module, the base processor being operable to perform the functionality of the higher layers of the communication protocol stack stored in the base memory, wherein the base processor does not perform the functionality of at least one lower layer of the communication protocol stack, instead allowing the communication module to perform the functionality of said at least one lower layer.

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