Method of bypassing vocoders in digital mobile communication system

Abstract

A method of bypassing vocoders in a digital mobile communication system, comprising the step of appending bypass mode data to data transmitted from a plurality of mobile stations, the bypass mode data instructing the vocoders not to perform encoding/decoding operations, and the step of transmitting the resultant data. According to the present invention, the unnecessary encoding/decoding operations are omitted for a mobile to mobile communication. Therefore, the present invention has the effect of removing the delay time and enhancing the voice quality.

What is claimed is:  
     
       1. A method of transmitting data in a digital mobile communication system employing vocoders, comprising the steps of: 
       appending bypass mode data to encoded data transmitted from a plurality of mobile stations, said bypass mode data instructing a first vocoder to not decode the data and a second vocoder to not encode the data; and  
       transmitting the resultant data.  
     
     
       2. The method of  claim 1 , wherein each of said vocoders is adapted to set its mode to a bypass mode, to analyze a data format of an input signal to determine whether the input signal is to be bypassed, to change only  a data rate only if it is determined that the input signal is to be bypassed and to transmit the bypassed input signal at the changed data rate. 
     
     
       3. A method of transmitting data in a digital mobile communication system employing vocoders, comprising the steps of: 
       appending bypass mode data to encoded data transmitted from a plurality of mobile stations, said bypass mode data instructing a first selector having a first vocoder and a second selector having a second vocoder whether to bypass the respective vocoders and transfer the data to packet routing dedicated communication ports; and  
       transmitting the transferred data.  
     
     
       4. The method of  claim 2 , wherein the data rate is changed by matching a mobile station's data speed with a PCM data speed. 
     
     
       5. The method of  claim 4 , wherein the mobile station's data speed is matched with the PCM data speed of  64  Kbps by repeating  22 - byte data of the mobile station seven times and adding a  6   - byte header to the resultant data.   
     
     
       6. The method of  claim 3 , wherein said appending step includes a step of determining based on data format of said bypass mode data whether the transmitted encoded data are to be passed to the vocoders or to bypass the vocoders. 
     
     
       7. The method of  claim 6 , wherein the determination of bypassing vocoders is made by call control processors which are connected to the packet routing dedicated communication ports.