Method of Error Recovery in Transmitting and Receiving Voice Service in Packet Based Mobile Communication Systems

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.