Apparatus and method for transmitting and receiving packets in a mobile communication system supporting hybrid automatic repeat request

Abstract

An apparatus and a method are provided for operating HARQ in a mobile communication system. The method includes receiving a number of HARQ processes of a semi-persistent resource allocation and semi-persistent resource allocation interval information for a first transmission; receiving data in the first transmission at a subframe based on the semi-persistent resource allocation interval information; calculating a HARQ process IDentifier (ID) using the number of HARQ processes of the semi-persistent resource allocation, the semi-persistent resource allocation interval information, and time information; receiving control information including the HARQ process ID on an L1 control channel; receiving data in a retransmission based on the control information including the HARQ process ID; combining the data received in the first transmission and the data received in the retransmission; and decoding the combined data.

What is claimed is: 
     
       1. A method for receiving data in a communication system, the method comprising:
 acquiring a number of hybrid automatic repeat request (HARQ) processes of a semi-persistent resource allocation and semi-persistent resource allocation interval information;   identifying the semi-persistent resource allocation for a subframe based on the semi-persistent resource allocation interval information and time information;   acquiring a HARQ process identifier (ID) using the number of HARQ processes of the semi-persistent resource allocation, the semi-persistent resource allocation interval information, and the time information;   acquiring soft buffer information; and   receiving data based on the semi-persistent resource allocation for the subframe, the HARQ process ID, and the soft buffer information.   
     
     
       2. The method of  claim 1 , further comprising setting the acquired HARQ process ID to a HARQ process ID for the subframe. 
     
     
       3. The method of  claim 1 , wherein the time information includes a System Frame Number (SFN) and a sub-frame number. 
     
     
       4. The method of  claim 1 , wherein the HARQ process ID is acquired based on:
   HARQ process ID=s modulo n,   where s is an integer derived from t/i, wherein t represents the time information, i represents the semi-persistent resource allocation interval information, and n represents the number of HARQ processes of the semi-persistent resource allocation.   
     
     
       5. A method for transmitting data in a communication system, the method comprising:
 transmitting information representative of a number of hybrid automatic repeat request (HARQ) processes of a semi-persistent resource allocation and semi-persistent resource allocation interval information;   allocating the semi-persistent resource for a subframe based on the semi-persistent resource allocation interval information and time information;   acquiring a HARQ process identifier (ID) using the number of HARQ processes of the semi-persistent resource allocation, the semi-persistent resource allocation interval information, and the time information;   transmitting soft buffer information; and   transmitting data based on the semi-persistent resource allocation for the subframe, the HARQ process ID, and the soft buffer information.   
     
     
       6. The method of  claim 5 , further comprising setting the acquired HARQ process ID to a HARQ process ID for the subframe. 
     
     
       7. The method of  claim 5 , wherein the time information includes a System Frame Number (SFN) and a sub-frame number. 
     
     
       8. The method of  claim 5 , wherein the HARQ process ID is acquired based on:
   HARQ process ID=s modulo n,   wherein s is an integer derived from t/i, t represents the time information, i represents the semi-persistent resource allocation interval information, and n represents the number of HARQ processes of the semi-persistent resource allocation.   
     
     
       9. An apparatus for receiving data in a communication system, the apparatus comprising:
 a controller configured to
 acquire a number of hybrid automatic repeat request (HARQ) processes of a semi-persistent resource allocation and semi-persistent resource allocation interval information, 
 identify the semi-persistent resource allocation for a subframe based on the semi-persistent resource allocation interval information and time information, 
 acquire a HARQ process identifier (ID) using the number of HARQ processes of the semi-persistent resource allocation, the semi-persistent resource allocation interval information, and the time information; and 
   a receiver configured to receive data based on the semi-persistent resource allocation for the subframe, the HARQ process ID, and the soft buffer information.   
     
     
       10. The apparatus of  claim 9 , wherein the controller is further configured to set the acquired HARQ process ID to a HARQ process ID for the subframe. 
     
     
       11. The apparatus of  claim 9 , wherein the time information includes a System Frame Number (SFN) and a sub-frame number. 
     
     
       12. The apparatus of  claim 9 , wherein the HARQ process ID is acquired based on:
   HARQ process ID=s modulo n,   wherein s is an integer derived from t/i, t represents the time information, i represents the semi-persistent resource allocation interval information, and n represents the number of HARQ processes of the semi-persistent resource allocation.   
     
     
       13. An apparatus for transmitting data in a communication system, the apparatus comprising:
 a transmitter configured to transmit information representative of a number of hybrid automatic repeat request (HARQ) processes of a semi-persistent resource allocation and semi-persistent resource allocation interval information, transmit soft buffer information, and transmit data based on the semi-persistent resource allocation for a subframe, the HAW) process ID, and the soft buffer information; and   a controller configured to allocate the semi-persistent resource for the subframe based on the semi-persistent resource allocation interval information and time information, and acquire a HARQ process identifier (ID) using the number of HARQ processes of the semi-persistent resource allocation, the semi-persistent resource allocation interval information, and the time information.   
     
     
       14. The apparatus of  claim 13 , wherein the controller is further configured to set the acquired HARQ process ID to a HARQ process ID for the subframe. 
     
     
       15. The apparatus of  claim 13 , wherein the time information includes a System Frame Number (SFN) and a sub-frame number. 
     
     
       16. The apparatus of  claim 13 , wherein the HARQ process ID is acquired based on:
   HARQ process ID=s modulo n,   wherein s is an integer derived from t/i, t represents the time information, i represents the semi-persistent resource allocation interval information, and n represents the number of HARQ processes of the semi-persistent resource allocation.   
     
     
       17. A method for receiving data in a communication system, the method comprising:
 acquiring information on a number of hybrid automatic repeat request (HARQ) processes associated with a semi-persistent resource allocation and interval information associated with the semi-persistent resource allocation, the number of HARQ processes corresponding to a quantity of the HARQ processes allocated for the semi-persistent resource allocation;   identifying a HARQ process identifier (ID) by using the number of HARQ processes associated with the semi-persistent resource allocation, an interval based on the interval information, and a system frame number;   receiving, from a base station, first data of a semi-persistent initial transmission associated with the identified HARQ process ID based on the interval and the system frame number;   transmitting, to the base station, a HARQ feedback associated with the first data of the semi-persistent initial transmission;   receiving, from the base station, the HARQ process ID for a retransmission over a control channel; and   receiving, from the base station, second data of the retransmission associated with the HARQ process ID.   
     
     
       18. The method of  claim 17 , wherein the HARQ feedback is one bit. 
     
     
       19. The method of  claim 18 , wherein the HARQ feedback is a negative acknowledgement (NACK). 
     
     
       20. The method of  claim 17 , wherein the HARQ feedback is transmitted at a predetermined timing. 
     
     
       21. The method of  claim 17 , further comprising combining the first data of the semi-persistent initial transmission and the second data of the retransmission. 
     
     
       22. A method for transmitting data in a communication system, the method comprising:
 transmitting, to a terminal, information representative of a number of hybrid automatic repeat request (HARQ) processes associated with a semi-persistent resource allocation and interval information associated with the semi-persistent resource allocation, the number of HARQ processes corresponding to a quantity of the HARQ processes allocated for the semi-persistent resource allocation;   identifying a HARQ process identifier (ID) by using the number of HARQ processes associated with the semi-persistent resource allocation, an interval associated with the interval information, and a system frame number;   transmitting, to the terminal, first data of a semi-persistent initial transmission associated with the identified HARQ process ID based on the interval and the system frame number;   receiving, from the terminal, a HARQ feedback associated with the first data of the semi-persistent initial transmission;   transmitting, to the terminal, the HARQ process ID for a retransmission over a control channel; and   transmitting, to the terminal, second data of the retransmission associated with the HARQ process ID.   
     
     
       23. The method of  claim 22 , wherein the HARQ feedback is one bit. 
     
     
       24. The method of  claim 23 , wherein the HARQ feedback is a negative acknowledgement (NACK). 
     
     
       25. The method of  claim 22 , wherein the HARQ feedback is transmitted at a predetermined timing. 
     
     
       26. A terminal apparatus for receiving data in a communication system, the terminal apparatus comprising:
 a controller configured to:
 acquire information on a number of hybrid automatic repeat request (HARQ) processes associated with a semi-persistent resource allocation and interval information associated with the semi-persistent resource allocation, the number of HARQ processes corresponding to a quantity of the HARQ processes allocated for the semi-persistent resource allocation, and 
 identify a HARQ process identifier (ID) by using the number of HARQ processes associated with the semi-persistent resource allocation, an interval based on the interval information, and a system frame number; and 
   a transceiver configured to:
 receive, from a base station, first data of a semi-persistent initial transmission associated with the identified HARQ process ID based on the interval and the system frame number, 
 transmit, to the base station, a HARQ feedback associated with the first data of the semi-persistent initial transmission; 
 receive, from the base station, the HARQ process ID for a retransmission over a control channel, and 
 receive, from the base station, second data of the retransmission associated with the HARQ process ID. 
   
     
     
       27. The terminal apparatus of  claim 26 , wherein the HARQ feedback is one bit. 
     
     
       28. The terminal apparatus of  claim 27 , wherein the HARQ feedback is a negative acknowledgement (NACK). 
     
     
       29. The terminal apparatus of  claim 26 , wherein the HARQ feedback is transmitted at a predetermined timing. 
     
     
       30. The terminal apparatus of  claim 26 , wherein the controller is further configured to combine the first data of the semi-persistent initial transmission and the second data of the retransmission. 
     
     
       31. A base station apparatus for transmitting data in a communication system, the base station apparatus comprising:
 a transceiver configured to:
 transmit, to a terminal, information representative of a number of hybrid automatic repeat request (HARQ) processes associated with a semi-persistent resource allocation and interval information associated with the semi-persistent resource allocation, the number of HARQ processes corresponding to a quantity of the HARQ processes allocated for the semi-persistent resource allocation, 
 transmit, to the terminal first data of a semi-persistent initial transmission associated with a HARQ process identifier (ID) based on an interval associated with the interval information and a system frame number, 
 receive, from the terminal, a HARQ feedback associated with the first data of the semi-persistent initial transmission, 
 transmit, to the terminal, the HARQ process ID for a retransmission over a control channel, and 
 transmit to the terminal, second data of the retransmission associated with the HARQ process ID; and 
   a controller configured to identify the HARQ process ID by using the number of HARQ processes associated with the semi-persistent resource allocation, the interval, and the system frame number.   
     
     
       32. The base station apparatus of  claim 31 , wherein the HARQ feedback is one bit. 
     
     
       33. The base station apparatus of  claim 32 , wherein the HARQ feedback is a negative acknowledgement (NACK). 
     
     
       34. The base station apparatus of  claim 31 , wherein the HARQ feedback is transmitted at a predetermined timing.