| 摘要 |
A method is provided for downloading data to add enhanced variable rate code (EVRC) functions to a vocoder in a base station controller (BSC) of a code division multiple access (CDMA) cellular system. The BSC includes a plurality of voice digital signaling processors (VDSPs), a call control digital signaling processor (CDSP), a selector and vocoder processor (SVP) and a selector interface processor (SIP). The BSC connects a base station transceiver subsystem (BTS) and a mobile switching center (MSC). Each of the plurality of VDSPs respectively control each of a plurality of vocoders for compressing a voice. The CDSP controls the plurality of VDSPs, the SVP controls the CDSP, and the SIP controls the SVP. The method includes the steps of: dividing a specific memory area into a code part and a data part for storing code and data, respectively; requesting the SIP to download an executable program and the code stored in the code part by BOOT of the SVP; loading the executable program and the code stored in the code part to the SVP by a processor loader execution (PLX) of the SIP; running the loaded executable program by the SVP; requesting the PLX of the SIP to load the data stored in the data part by the executable program; and loading the data stored in the data part directly to a memory of the CDSP so as to bypass a memory of the SVP.
|
