Method and apparatus for allocating peer-to-peer resource in relay-based wireless communication system

1. A method of allocating a Peer-to-Peer (P2P) resource in a relay-based wireless communication system, the method comprising:

receiving relay link resource information;

determining, based on the relay link resource information, whether a current link is a multi-hop link;

if the current link is a multi hop link, interference generated by the serving station is less than a threshold, a first interference of a relay link is less than a second interference of an access link, and the serving station comprises a Base Station (BS), reallocating a Relay Station (RS)-BS link resource;

if the current link is a multi-hop hop link, interference generated by the serving station is less than a threshold, a first interference of a relay link is less than a second interference of an access link, and the serving station comprises an RS, reallocating a BS-RS link resource;

determining a maximum transmittable power level for P2P communication; and

performing P2P communication using the allocated resource.

2. The method of claim 1 , further comprising:

if the current link is a multi-hop link, interference generated by the serving station is less than a threshold, and a first interference of a relay link is greater than a second interference of an access link,

allocating an uplink resource as the P2P resource.

3. The method of claim 1 , wherein the serving station comprises at least one of a BS and an RS, and further wherein the determining of the serving station comprises determining a received signal strength.

4. The method of claim 1 , wherein the relay link resource information comprises at least one of a relay link resource location and an indicator indicating whether the current link is a multi-hop link.

5. The method of claim 1 , wherein the determining of the serving station comprises measuring received signal strengths of an RS and a BS.

6. The method of claim 5 , wherein the received signal strengths of the RS and the BS are determined by measuring a signal strength of a unique signal respectively corresponding to the RS and the BS.

7. The method of claim 6 , wherein the unique signal comprises at least one of a preamble signal, a sounding signal and a reference signal of the RS.

8. An apparatus for allocating a Peer-to-Peer (P2P) resource in a relay-based wireless communication system, the apparatus comprising:

a P2P controller for receiving relay link resource information; and

a P2P resource selector for determining, based on the relay link resource information, whether a current link is a multi-hop link, for, if the current link is a multi-hop link, interference generated by the serving station is less than a threshold, a first interference of a relay link is less than a second interference of an access link, and the serving station comprises a Base Station (BS), reallocating a Relay Station (RS)-Base Station BS link resource, for, if the current link is a multi-hop link, interference generated by the serving station is less than a threshold, a first interference of a relay link is less than a second interference of an access link, and the serving station comprises a RS, reallocating a BS-RS link resource, and for determining a maximum transmittable power level for P2P communication,

wherein the P2P controller further performs P2P communication using the allocated resource.

9. The apparatus of claim 8 , wherein, if the current link is not a multi-hop link, the P2P resource selector determines a received signal strength by using a preamble of a Base Station (BS) and selects an uplink resource as the P2P resource.

10. The apparatus of claim 8 , wherein the serving station comprises at least one of the BS and the RS, and can be determined based on the received signal strength.

11. The apparatus of claim 8 , wherein the relay link resource information comprises at least one of a relay link resource location and an indicator indicating whether the current link is a multi-hop link.

12. The apparatus of claim 8 , further comprising a signal strength measurer for determining received signal strengths of an RS and a BS in order to determine the serving station.

13. The apparatus of claim 12 , wherein the received signal strengths of the RS and the BS are determined based on a signal strength of a unique signal respectively corresponding to the RS and the BS.

14. The apparatus of claim 13 , wherein the unique signal comprises at least one of a preamble signal, a sounding signal and a reference signal of the RS.

15. The method of claim 1 , further comprising:

if interference generated by the serving station is greater than a threshold, allocating a P2P-dedicated resource.

16. The method of claim 1 , further comprising:

if the current link is not a multi-hop link and interference generated by the serving station is less than a threshold, allocating an uplink resource as the P2P resource.

17. The apparatus of claim 8 , wherein the P2P resource selector, if interference generated by the serving station is greater than a threshold, allocates a P2P-dedicated resource.

18. The apparatus of claim 8 , wherein the P2P resource selector, if the current link is not a multi-hop link and interference generated by the serving station is less than a threshold, allocates an uplink resource as the P2P resource.

19. A method of allocating a Peer-to-Peer (P2P) resource in a relay-based wireless communication system, the method comprising:

receiving relay link resource information;

determining, based on the relay link resource information, whether a current link is a multi-hop link;

if the current link is a multi-hop link, determining whether a first interference of a relay link is less than a second interference of an access link;

if a first interference of a relay link is less than a second interference an access link, determining whether a serving station comprises a Base Station (BS) or a Relay Station (RS);

if the serving station comprises a BS, reallocating a RS-BS link resource, and if the serving station comprises a RS, reallocating a BS-RS link resource;

determining a maximum transmittable power level for P2P communication; and

performing P2P communication using the allocated resource.

20. The method of claim 19 , further comprising:

if a first interference of a relay link is greater than a second interference an access link, allocating an uplink resource as the P2P resource.

21. The method of claim 19 , further comprising:

if the current link is not a multi-hop link, allocating an uplink resource as the P2P resource.