Method of error recovery in transmitting and receiving voice service in packet based mobile communication systems

Abstract

Provided is a method of transmitting and receiving data using a persistent allocation scheme in order to effectively support a voice service between a base station and a mobile terminal in a packet based mobile communication system. When an error occurs in transmitting a control information that indicates whether to use a radio resource using the persistent allocation scheme, the base station may retransmit the control information and thereby maintain a communication quality.

The invention claimed is:  
     
       1. A method of transmitting data in a base station, the method comprising:
 transmitting a first part of the data and an activation message indicating a start of a persistent scheduling transmission in a same persistent allocation interval, the activation message transmitted through a Physical Downlink Control Channel (PDCCH); 
 receiving an acknowledgement message for the activation message from a terminal; 
 transmitting a second part of the data according to the persistent scheduling transmission; 
 transmitting a deactivation message indicating an end of the persistent scheduling transmission; and 
 receiving an acknowledgement message for the deactivation message from the terminal, wherein the activation message is retransmitted to the terminal if a negative acknowledgement message for the activation message is received or a positive acknowledgement message for the activation message is not received from the terminal. 
 
     
     
       2. The method of  claim 1 , wherein the PDCCH including the activation message is perceived by the terminal through Semi-Persistent Scheduling Cell-Radio Network Temporary Identifier (SPS C-RNTI). 
     
     
       3. The method of  claim 1 , wherein the first part of the data and the second part of the data are transmitted through Physical Downlink Shared Channel (PDSCH). 
     
     
       4. The method of  claim 1 , wherein the deactivation message is transmitted through Physical Downlink Control Channel (PDCCH) and the acknowledgement message for the deactivation message is received through Physical Uplink Control Channel (PUCCH). 
     
     
       5. A method of receiving data in a terminal, the method comprising:
 receiving a first part of the data and an activation message indicating a start of a persistent scheduling transmission in a same persistent allocation interval, the activation message received through a Physical Downlink Control Channel (PDCCH); 
 transmitting an acknowledgement message for the activation message to a base station; 
 receiving a second part of the data according to the persistent scheduling transmission; 
 receiving a deactivation message indicating an end of the persistent scheduling transmission, the deactivation message received through the PDCCH; and 
 transmitting an acknowledgement message for the deactivation message to the base station. 
 
     
     
       6. The method of  claim 5 , wherein the terminal perceives the PDCCH including the activation message or the deactivation message using Semi-Persistent Scheduling Cell-Radio Network Temporary Identifier (SPS C-RNTI). 
     
     
       7. The method of  claim 5 , wherein the terminal transmits positive acknowledgement message for the activation message successfully received through PDCCH. 
     
     
       8. The method of  claim 5 , wherein the terminal transmits negative acknowledgement message for the deactivation message included in PDCCH if the terminal fails to decode the PDCCH.