Patent ID: 7336630
Filing Date: 2008-02-26
Classification: H04L,H04W

Abstract:
1. A method of transmitting secondary data alternating with speech or primary data on a circuit-switched connection of a mobile communications system, said mobile communications system using discontinuous transmission to transfer speech or primary data in frames, so that transmission of speech or primary data is discontinued when it is indicated that there is no speech or primary data to be transmitted and continued when it is indicated that there is speech or primary data to be transmitted, said method comprising: transmitting speech or primary data; storing secondary data in buffer means; discontinuing the transmission of speech or primary data frames for a certain time interval, thus causing a decrease in the quality of the transmitted speech or primary data, and transmitting secondary data stored in the buffer means until the end of said certain time interval; discontinuing the transmission of secondary data at the end of said certain time interval and re-starting the transmission of speech or primary data; when it is indicated that there is no speech or primary data to be transmitted, transmitting secondary data stored in the buffer means until there are no more secondary data to be transmitted or until it is indicated that there is speech or primary data to be transmitted; and using in each frame an identifier to indicate whether the frame contains speech or primary data, or whether the frame contains secondary data.