Apparatus and method for transmitting and receiving automatic repeat request feedback message in wireless communication system

1. A method for receiving an Automatic Repeat reQuest (ARQ) feedback message at a transmitting unit in a wireless communication system, the method comprising:

transmitting an ARQ feedback request message to a receiving unit;

allocating to the receiving unit a fixed-size resource for transmitting the ARQ feedback message, the fixed-size resource comprising an unsolicited bandwidth, generating the fixed-size resource and transmitting the fixed-size resource to the receiving unit; and

receiving the ARQ feedback message from the receiving unit over the allocated fixed-size resource when determined that a size of the allocated fixed-size resource is greater than or equal to a size of the ARQ feedback message, and receiving a resource request message from the receiving unit over the allocated fixed-size resource when determined that the size of the allocated fixed-size resource is less than the size of the ARQ feedback message.

2. The method of claim 1 , further comprising transmitting a resource allocation message to the receiving unit, wherein the resource allocation message comprises an A-MAP message.

3. The method of claim 1 , wherein the allocated fixed-size resource is of a size required to transmit the ARQ feedback message according to a cumulative ACKnowledge (ACK) scheme.

4. The method of claim 1 , wherein the resource request message is constituted in an extension header.

5. The method of claim 1 , wherein the resource request message comprises information relating to a size of the resource needed to transmit the ARQ feedback message.

6. The method of claim 1 , further comprising:

when receiving the resource request message from the receiving unit over the allocated fixed-size resource, allocating a resource of a size required for the receiving unit to transmit the ARQ feedback message; and

receiving the ARQ feedback message from the receiving unit over the allocated resource of the size required by the receiving unit.

7. The method of claim 1 , further comprising:

transmitting ARQ data to the receiving unit; and

transmitting an ARQ feedback request message which requests the receiving unit to transmit an ARQ feedback message with respect to the ARQ data.

8. The method of claim 7 , further comprising, after the transmitting of the ARQ feedback request message:

allocating a dedicated ranging code for transmitting the ARQ feedback message, to the receiving unit; and

receiving the allocated dedicated ranging code from the receiving unit.

9. A method for transmitting an Automatic Repeat reQuest (ARQ) feedback message at a receiving unit in a wireless communication system, the method comprising:

receiving an ARQ feedback request message from a transmitting unit;

being allocated from the transmitting unit a fixed-size resource for transmitting an ARQ feedback message, the fixed-size resource comprising an unsolicited bandwidth;

when determined that a size of the allocated fixed-size resource is greater than or equal to a size of the ARQ feedback message, transmitting the ARQ feedback message to the transmitting unit over the allocated fixed-size resource; and

when determined that the size of the allocated fixed-size resource is less than the size of the ARQ feedback message, transmitting a resource request message to the transmitting unit over the allocated fixed-size resource.

10. The method of claim 9 , further comprising:

receiving a resource allocation message from the transmitting unit,

wherein the resource allocation message comprises an A-MAP message.

11. The method of claim 9 , wherein the allocated fixed-size resource is of a size required to transmit the ARQ feedback message according to a cumulative ACKnowledge (ACK) scheme.

12. The method of claim 9 , wherein the resource request message is constituted in an extension header.

13. The method of claim 9 , wherein the resource request message comprises information relating to a size of the resource needed to transmit the ARQ feedback message.

14. The method of claim 9 , further comprising:

when the resource request message is transmitted to the transmitting unit over the allocated fixed-size resource, being allocated a resource of a size required to transmit the ARQ feedback message from the transmitting unit; and

transmitting the ARQ feedback message to the transmitting unit over the allocated resource of the size required to transmit the ARQ feedback message.

15. The method of claim 9 , further comprising:

receiving ARQ data from the transmitting unit; and

receiving from the transmitting unit an ARQ feedback request message which requests to transmit an ARQ feedback message with respect to the ARQ data.

16. The method of claim 15 , further comprising, after the receiving of the ARQ feedback request message:

being allocated a dedicated ranging code for transmitting the ARQ feedback message, from the transmitting unit; and

transmitting the allocated dedicated ranging code to the transmitting unit.

17. An apparatus for receiving an Automatic Repeat reQuest (ARQ) feedback message at a transmitting unit in a wireless communication system, the apparatus comprising:

a transmitter for transmitting an ARQ feedback request message to a receiving unit;

a resource allocator for allocating to the receiving unit a fixed-size resource for transmitting an ARQ feedback message, the fixed-size resource comprising an unsolicited bandwidth, the resource allocator further generating the fixed-size resource and transmitting the fixed-size resource to the receiving unit; and

a receiver for receiving the ARQ feedback message from the receiving unit over the allocated fixed-size resource when determined that a size of the allocated fixed-size resource is greater than or equal to a size of the ARQ feedback message, and receiving a resource request message from the receiving unit over the allocated fixed-size resource when determined that the size of the allocated fixed-size resource is greater than or equal to the size of the ARQ feedback message.

18. The apparatus of claim 17 , further comprising:

a transmitter for transmitting a resource allocation message to the receiving unit,

wherein the resource allocation message comprises an A-MAP message.

19. The apparatus of claim 17 , wherein the allocated fixed-size resource is of a size required to transmit the ARQ feedback message according to a cumulative ACKnowledge (ACK) scheme.

20. The apparatus of claim 17 , wherein the resource request message is constituted in an extension header.

21. The apparatus of claim 17 , wherein the resource request message comprises information relating to a size of the resource needed to transmit the ARQ feedback message.

22. The apparatus of claim 17 , wherein the resource allocator, when receiving the resource request message from the receiving unit over the allocated fixed-size resource, allocates a resource of a size required for the receiving unit to transmit the ARQ feedback message, and

the receiver receives the ARQ feedback message from the receiving unit over the allocated resource of the size required by the receiving unit.

23. The apparatus of claim 17 , further comprising:

a transmitter for transmitting ARQ data to the receiving unit and for transmitting an ARQ feedback request message which requests the receiving unit to transmit an ARQ feedback message with respect to the ARQ data.

24. The apparatus of claim 23 , further comprising:

a dedicated ranging code allocator for, after transmitting the ARQ feedback request message, allocating a dedicated ranging code for transmitting the ARQ feedback message, to the receiving unit,

wherein the receiver receives the allocated dedicated ranging code from the receiving unit.

25. An apparatus for transmitting an Automatic Repeat reQuest (ARQ) feedback message at a receiving unit in a wireless communication system, the apparatus comprising:

a receiver receiving an ARQ feedback request message from a transmitting unit;

an ARQ controller being allocated from the transmitting unit a fixed-size resource for transmitting an ARQ feedback message, the fixed-size resource comprising an unsolicited bandwidth, comparing a size of the allocated fixed-size resource with a size of a resource needed for transmitting the ARQ feedback message, and controlling a transmitter to transmit at least one of the ARQ feedback message and a resource request message to the transmitting unit over the allocated fixed-size resource according to a result of the comparison; and

the transmitter for transmitting the ARQ feedback message to the transmitting unit over the fixed-size resource allocated when determined that the size of the allocated fixed-size resource is greater than or equal to the size of the resource needed for transmitting the ARQ feedback message, and transmitting a resource request message to the transmitting unit over the allocated fixed-size resource when determined that the allocated fixed-size resource is less than the size of the resource needed for transmitting the ARQ feedback message.

26. The apparatus of claim 25 , further comprising:

a receiver for receiving a resource allocation message from the transmitting unit,

wherein the resource allocation message comprises an A-MAP message.

27. The apparatus of claim 25 , wherein the allocated fixed-size resource is of a size required to transmit the ARQ feedback message according to a cumulative ACKnowledge (ACK) scheme.

28. The apparatus of claim 25 , wherein the resource request message is constituted in an extension header.

29. The apparatus of claim 25 , wherein the resource request message comprises information relating to a size of the resource needed to transmit the ARQ feedback message.

30. The apparatus of claim 25 , wherein the ARQ controller, when transmitting the resource request message to the transmitting unit over the allocated fixed-size resource, is allocated a resource of a size required to transmit the ARQ feedback message from the transmitting unit, and

the transmitter transmits the ARQ feedback message to the transmitting unit over the allocated resource of the size required to transmit the ARQ feedback message.

31. The apparatus of claim 25 , further comprising:

a receiver for receiving ARQ data from the transmitting unit and for receiving from the transmitting unit an ARQ feedback request message which requests to transmit an ARQ feedback message with respect to the ARQ data.

32. The apparatus of claim 31 , wherein the ARQ controller, after receiving the ARQ feedback request message, is allocated a dedicated ranging code for transmitting the ARQ feedback message, from the transmitting unit, and the transmitter transmits the allocated dedicated ranging code to the transmitting unit.