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Method for controlling a transcoder o a mobile communication system

A mobile communication system and transcoder technology, applied in the field of controlling transcoder operation, can solve the problems of long transmission delay, inability of a base station to indicate the need for timing adjustment, and no longer being able to find the need for adjustment.

Inactive Publication Date: 2003-06-25
NOKIA NETWORKS OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this known method is that if the transmission delay for sending information from the transcoder to the base station becomes longer, the adjustment algorithm of the base station becomes unstable, the correct adjustment needs can no longer be found, and the base station cannot send information to the transcoder. tor correctly indicates that timing adjustments need
Therefore, the adjustment requirement information sent by the base station to the transcoder will be incorrect, making the synchronization of the TRAU frame worse and worse

Method used

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  • Method for controlling a transcoder o a mobile communication system
  • Method for controlling a transcoder o a mobile communication system
  • Method for controlling a transcoder o a mobile communication system

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Embodiment Construction

[0026] Fig. 1 is a block diagram of a first preferred embodiment of a mobile communication system according to the present invention. The mobile communication system of Fig. 1 may be eg a GSM system.

[0027] The base station BTS1 shown in FIG. 1 communicates with the base station controller BSC via the ground station 1 and the satellite 3 . The base station BTS2 then communicates via cable 3 with the same base station controller BSC.

[0028] If the connection from the mobile services switching center MSC to the mobile station MS2 is active, the encoder 6 of the remote transcoder TRAU encodes the speech signal received in the downlink direction from the mobile services switching center MSC into speech parameters, which it places in the TRAU In the frame, it is sent to the base station BTS2 by the base station controller BSC. The base station BTS2 waits until the entire TRAU frame has been received before sending the frame to the mobile station MS2 via the radio path in the ...

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Abstract

The present invention relates to a mobile communication system comprising a mobile services switching centre, a base station and a transcoder, and in which system the transcoder receives from the base station frames containing speech parameters, and from the mobile services switching centre speech signals which it encodes into speech parameters to be transmitted to the base station in the frames. To enable the cooperation between the transcoder and the base station to be controlled as simply as possible, the mobile communication system includes a controller for transmitting predetermined control information to the base station, whereby the base station is arranged to control the operation of the transcoder via the telecommunication connection in response to the reception of the control information.

Description

technical field [0001] The present invention relates to a method for controlling the operation of a transcoder in a mobile communication system and a mobile communication system [0002] In particular, the invention relates to data transmission between a transcoder and a base station of the GSM mobile communication system (Global System for Mobile Communications). However, it is to be noted that although the invention is described below in particular with respect to the GSM system, the invention is also applicable to other corresponding mobile communication systems. Background technique [0003] The wireless path in the GSM system is digital, and the spectrum it needs depends on the transmission speed used by the wireless path. The higher the transmission speed used by the wireless path, the wider the spectrum it requires. Therefore, the voice coding of the fixed PSTN / ISDN telephone network (public switched telephone network / integrated service digital network) is not suita...

Claims

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Application Information

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IPC IPC(8): H04W88/18
CPCH04W88/181
Inventor 雷夫·伏莱曼
Owner NOKIA NETWORKS OY