Patent ID: 6839557
Filing Date: 2005-01-04
Classification: H04W

Abstract:
1. A method of transmitting data over a mobile telephone speech channel between a radio telephone terminal, said radio telephone terminal having at least one type of source encoding and a data transmitter and/or receiver unit, said data transmitter being part of a network that supports modes of communication with transcoding between different types of source encoding and at least one mode of communication without transcoding, that can be set up between two mobile telephones having at least one type of source encoding in common, said method including: negotiating a selected mode of communication between said first mobile telephone terminal and said data transmitter and/or receiver unit, wherein the data transmitter unit sends one of the types of source encoding available to the first mobile terminal to said second mobile terminal to engage in said mode of communication without transcoding; and transmitting data over the mobile telephone network in frames reserved for speech signals encoded with the type of source encoding selected for the mode of communication.