Signalling in a digital mobile communications system

CAFC
  • US 6,633,536 B1
  • Filed: 04/08/1999
  • Issued: 10/14/2003
  • Est. Priority Date: 09/17/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for transmitting messages and user information in a digital telecommunications system, the method comprising:

  • sending the user information via a transmission channel in transmission frames assigned to the user information, wherein each transmission frame has one of two states, the states being a good state and a bad state;

    for each different message, defining a corresponding unique bit pattern;

    unique bit for each individual message, placing the corresponding bit pattern into a transmission frame;

    transmitting each message by marking as the message at least one transmission frame which is assigned to the user information; and

    restricting the number of consecutive frames marked as messages to a sufficiently low number so as not to substantially impair the quality of the user information, wherein the marking substantially consists of inserting a bit pattern corresponding to the message into the at least one transmission frame and setting the state of the transmission frame to bad.

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