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Message unit for use with multi-beam satellite-based messaging system and method of operation thereof

  • US 5,596,315 A
  • Filed: 10/03/1994
  • Issued: 01/21/1997
  • Est. Priority Date: 10/03/1994
  • Status: Expired due to Term
First Claim
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1. A method executed by an addressable call receiver receiver, said receiver having a sleep cycle and a wake cycle, said receiver being subjected to transmitted information in which a plurality of messages are grouped into a frame, a plurality of frames being grouped into a group, and a plurality of groups being grouped into a block, each of said frames having a frame header comprising frame, group, and block identification, predetermined frames each comprising a block header, said predetermined frames constituting an acquisition group, and said receiver storing an identification value identifying a block to which said receiver is assigned said method comprising the following steps:

  • (a) exiting said sleep cycle and examining one of said transmitted frame headers;

    (b) if said block identification of said frame header matches said identification value, proceeding to step (c), otherwise proceeding to step (d);

    (c) determining from said group identification whether said frame is part of an acquisition group;

    (i) if so, said receiver monitors said acquisition group and proceeds to step (e);

    (ii) if not, said receiver proceeds to step (d);

    (d) using said frame identification to determine when it should awake from said sleep cycle;

    (e) entering said sleep cycle.

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