×

Security of packet-mode transmission in a mobile communication system

  • US 6,118,775 A
  • Filed: 11/04/1997
  • Issued: 09/12/2000
  • Est. Priority Date: 03/04/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for data transmission between a transmitter and a receiver (MS, GSN) in a digital mobile communication system comprising at least one mobile station (MS) and at least one air interface (Um), in which method:

  • the data to be transmitted is assembled into frames (F) comprising at least a header (1) and a data portion (2); and

    frames (F) are transmitted only when there is need for data transmission;

    characterized in that;

    an extra information field (3) is added to the data portion (2) of a frame (F), andthe transmitter and the receiver (MS, GSN) negotiate between themselves an algorithm and/or a parameter on the basis of which the contents of the extra information field (3) are formed.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×