Method and apparatus for controlling rate of voice service in a mobile communication system supporting voice service via packet network

Abstract

A method for controlling a rate of a voice service in a mobile communication system supporting the voice service via a packet network. The method includes the steps of receiving a control message at a terminal from a radio network controller (RNC); if the control message indicates control of a downlink rate, determining a downlink rate according to the control message; setting a Change Mode Request (CMR) field of an uplink Voice over Internet Protocol (VoIP) packet according to the downlink rate, and transmitting the uplink VoIP packet from the terminal to the RNC; if the received control message indicates control of an uplink rate, determining an uplink rate according to the control message; and generating an uplink VoIP packet including uplink voice data generated according to the determined uplink rate and frame type (FT) information indicating the determined uplink rate, and transmitting the uplink VoIP packet from the terminal to the RNC.

What is claimed is: 
     
         1 . A method of an apparatus in a packet-based voice communication system for receiving an IP packet from a terminal, the method comprising:
 transmitting, by the apparatus, control information for triggering an update of an operation of a voice service associated with a downlink voice rate; and   receiving, by the apparatus, an IP packet including a field of the operation of the voice service associated with the downlink voice rate which is updated according to the transmitted control information,   wherein the control information indicates a decrease of the downlink voice rate.   
     
     
         2 . The method of  claim 1 , wherein the field of the operation of the voice service comprises voice rate information. 
     
     
         3 . The method of  claim 1 , wherein the control information is transmitted via a radio control message. 
     
     
         4 . The method of  claim 1 , wherein the control information includes desired frame type (FT) information associated with the downlink voice rate. 
     
     
         5 . An apparatus for receiving an IP packet from a terminal in a packet-based voice communication system, the apparatus is configured to:
 transmit control information for triggering an update of an operation of a voice service associated with a downlink voice rate; and   receive an IP packet including a field of the operation of the voice service associated with the downlink voice rate which is updated according to the transmitted control information,   wherein the control information indicates a decrease of the downlink voice rate   
     
     
         6 . The apparatus of  claim 5 , wherein the field of the operation of the voice service comprises voice rate information. 
     
     
         7 . The apparatus of  claim 5 , wherein the control information is received via a radio control message. 
     
     
         8 . The apparatus of  claim 5 , wherein the control information includes desired FT information associated with the downlink voice rate.