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Method and apparatus for organizing and recovering information communicated in a radio communication system

  • US 5,793,756 A
  • Filed: 11/19/1996
  • Issued: 08/11/1998
  • Est. Priority Date: 03/15/1995
  • Status: Expired due to Term
First Claim
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1. A method used in a selective call radio for receiving a radio signal transmitted on a first radio channel having short and long messages included in a plurality of control frames and data frames, each of the short and long messages having an address signal and related message information,wherein each control frame comprises an address field and an information field, andwherein the address field of a control frame has a set of address signals, and wherein each address signal of the set of address signals has two different portions which are a subvector and an address, andwherein each subvector has a binary value indicating a position of a data packet within the control frame, andwherein each address indicates one of a plurality of selective call radios associated with the data packet, andwherein the information field follows the address field and has a set of data packets, and wherein each data packet in the set of data packets has the position of the data packet indicated by the binary value of at least one subvector within the control frame, and wherein each data packet in the set of data packets is one of a vector packet and a short message packet, and wherein vector packets indicate starting positions of long messages within the plurality of control frames and data frames, said method comprising the steps of:

  • receiving the radio signal;

    determining a presence of a first address within a first address signal within the address field in the control frame received in the radio signal, when the first address matches an embedded address assigned to the selective call radio;

    determining the binary value of a first subvector which is a portion of the first address signal;

    decoding a starting position of a first data packet determined by the binary value of the first subvector;

    recovering the first data packet at the starting position of the first data packet;

    decoding a starting position of a first long message when the first data packet is a vector packet; and

    processing the first long message beginning at the starting position of the first long message.

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