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Method and base station system for voice transmission via a radio interface in a digital radio communication system
| Details |
Inventors: Oestreich, Stefan; Farber, Michael; Kottkamp, Meik;
Assignee: Siemens Aktiengesellschaft (Munich, DE)
Primary Examiner: Trost; William
Assistant Examiner: Perez-Gutierrez; Rafael
Attorney, Agent or Firm: Greenberg; Laurence A., Stemer; Werner H., Mayback; Gregory L.
A method for voice transmission via a radio interface in a digital radio communication system includes the step of transmitting at least one signal between a base station of a base station system and a radio station. At least one characteristic value relating to the transmission conditions of the radio interface is determined from this signal. The characteristic value is stored in at least one storage device and is taken into account at a later point in time in addition to currently determined characteristic values for a voice and channel coding on the transmitter side. A base station system for voice transmission via a radio interface in a digital radio communication system is also provided. |
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DETAILED DESCRIPTION It is accordingly an object of the invention to provide a method and a base station system which overcome the above-mentioned disadvantages of the heretofore-known methods and systems of this general type and which allow improved voice and channel coding, irrespective of fluctuations, in particular short term variations, in the transmission channel characteristics.
With the foregoing and other objects in view there is provided, in accordance with the invention, a method for voice transmission via a radio interface in a digital radio communication system including a base station connected to a base station controller, and a radio station located in a radio coverage area of the base station.
The method includes the steps of: transmitting a signal via a radio interface between a radio station and a base station; determining, from the signal, a characteristic value relating to transmission conditions of the radio interface; storing the characteristic value in a storage device for providing a stored characteristic value; performing, with a voice and channel codec, a voice and channel coding at a transmitter side for a voice transmission; and controlling the voice and channel coding at the transmitter side by taking into account a currently determined characteristic value and the previously determined stored characteristic value.
In other words, in the method according to the invention for voice transmission via a radio interface in a digital radio communication system which has at least one base station which is connected to a base station controller, as well as at least one first radio station which is located in the radio coverage area or radio supply area of the base station, at least one signal is transmitted via the radio interface between the first radio station and the base station.
At least one characteristic value relating to the transmission response of the radio interface is determined from this signal.
The characteristic value is stored in at least one storage device and is taken into account at a later point in time in addition to a currently determined characteristic value for controlling transmitter-side voice and channel coding through the use of at least one voice and channel codec
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