Method for adapting the mode of operation of a multi-mode code to the changing conditions of radio transfer in a CDMA mobile radio network
AssigneeT-Mobile Deutschland GmbH
InventorsRene Bemmer, Zhongrong Liu
Life of this patent
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Abstract
The invention concerns a procedure to adapt the operating mode of a multi-mode codec to the changing transmission conditions in a CDMA mobile transmission network. The object consists of the coordination of the adaption of the codec operating modes in both transmission interfaces involved. This is achieved by a constant polling regarding the quality of transmission on the transmission segments during a communication connection, where a change in transmission quality for any unit involved in the transmission initiates a change of codec operating modes and where the present or future change in codec operating mode is passed to the other units involved in the transmission.
Claims13
A method for adapting the operating mode of a multi-mode codec to changing transmission conditions in a CDMA mobile transmission network, comprising:
- whichever of two mobile stations (MS1;
- MS2) encounters a change in the transmission quality on its air interface, which causes it to change its codec operating mode, induces the other mobile station (MS1;
- MS2) in the case of a transmission between two mobile stations, or a transcoder in the case of a transmission from a mobile station to a public switching telephone network, to likewise change the codec operating mode;
- and having a radio network controller RNC instruct a mobile station MS via a signaling channel between the radio network controller RNC and the mobile station MS to use a different codec operating mode and to specify the time of change, once the radio network controller RNC has decided to change the codec operating mode.
A method for adapting the operating mode of a multi-mode codec to changing transmission conditions in a CDMA mobile transmission network, comprising:
- whichever of two mobile stations (MS1;
- MS2) encounters a change in the transmission quality on its air interface, which causes it to change its codec operating mode, induces the other mobile station (MS1;
- MS2) in the case of a transmission between two mobile stations, or a transcoder in the case of a transmission from a mobile station to a public switching telephone network, to likewise change the codec operating mode;
- having a radio network controller RNC instruct a mobile station MS via a signaling channel between the radio network controller RNC and the mobile station MS to use a different codec operating mode and to specify the time of change, once the radio network controller RNC has decided to change the codec operating mode;
- and
- specifying the time of change by means of frame identification between the radio network controller RNC and the mobile station MS.
A method for adapting the operating mode of a multi-mode codec to changing transmission conditions in a CDMA mobile transmission network, comprising:
- whichever of two mobile stations (MS1;
- MS2) encounters a change in the transmission quality on its air interface, which causes it to change its codec operating mode, induces the other mobile station (MS1;
- MS2) in the case of a transmission between two mobile stations, or a transcoder in the case of a transmission from a mobile station to a public switching telephone network, to likewise change the codec operating mode;
- having a radio network controller RNC instruct a mobile station MS via a signaling channel between the radio network controller RNC and the mobile station MS to use a different codec operating mode and to specify the time of change, once the radio network controller RNC has decided to change the codec operating mode;
- and
- having the mobile station MS transmit in a new operating mode from the specified time of change.
Dependencies are inferred from the claim text.