Method and apparatus for transmitting/receiving reference signal for positioning in wireless communication system

1. A method of transmitting a reference signal from a Base Station (BS) to a Mobile Station (MS) for positioning in a wireless communication system, the method comprising:

locating a Primary Advance (PA) preamble in a first symbol of a second frame among frames constituting each of multiple superframes;

locating a Secondary Advance (SA) preamble in first symbols of first and third frames among the frames constituting each of the multiple superframes;

determining a plurality of consecutive first superframes belonging to a Location-Based Service (LBS) zone from among the multiple superframes;

including the reference signal for LBS in a first symbol of a first subframe of a last frame among frames constituting each of the first superframes;

when data is to be transmitted, including the data in a first symbol of a first subframe of a last frame among frames constituting each of second superframes that correspond to the multiple superframes excluding the first superframes; and

communicating with the MS by using the first and second superframes.

2. The method as claimed in claim 1 , further comprising:

transmitting the reference signal in a frame with a superframe number that, according to a predetermined rule, has relevance to a Base Station IDentifier (BS-ID) of a Base Station (BS) transmitting the reference signal; and

waiting without transmitting the reference signal in a frame with the superframe number that has no relevance to the BS-ID.

3. The method as claimed in claim 1 , wherein the reference signal is used for the MS to estimate a location thereof, or is reported to a BS or a location server through a message predetermined by the MS.

4. The method as claimed in claim 1 , further comprising:

transmitting a control message including information indicating whether LBS zone transmission is switched on.

5. The method as claimed in claim 4 , wherein the information indicating whether the LBS zone transmission is switched on includes a period of the LBS zone.

6. The method as claimed in claim 5 , wherein the control message comprises a SuperFrame Header (SFH) that is transmitted through a first frame within each superframe.

7. The method as claimed in claim 1 , wherein the PA preamble and the SA preamble are a series of predefined symbols for use in synchronization and equalization, and wherein the PA preamble provides basic BS information, and the SA preamble provides additional BS information.

8. A method of receiving a reference signal from a Base Station (BS) to a Mobile Station (MS) for positioning in a wireless communication system, the method comprising:

detecting a Primary Advanced (PA) preamble from a first symbol of a second frame among frames constituting each of multiple superframes;

detecting a Secondary Advance (SA) preamble from first symbols of first and third frames among the frames constituting each of the multiple superframes;

when a Location-Based Service (LBS) zone is enabled, determining a plurality of consecutive first superframes belonging to the LBS zone from among the multiple superframes;

receiving and detecting the reference signal for LBS from a first symbol of a first subframe of a last frame among frames constituting each of the first superframes; and

when data is to be received, detecting the data from a first symbol of a first subframe of a last frame among frames constituting each of second superframes that correspond to the multiple superframes excluding the first superframes.

9. The method as claimed in claim 8 , further comprising:

receiving the reference signal in a frame with a superframe number having predetermined relevance to a Base Station IDentifier (BS-ID) of a Base Station (BS) to be measured.

10. The method as claimed in claim 8 , wherein the reference signal is used for the MS to estimate a location thereof, or is reported to a BS or a location server through a message predetermined by the MS.

11. The method as claimed in claim 8 , further comprising:

receiving a control message including information indicating whether LBS zone transmission is switched on.

12. The method as claimed in claim 11 , wherein the information indicating whether the LBS zone transmission is switched on includes a period of the LBS zone.

13. The method as claimed in claim 12 , wherein the control message comprises a SuperFrame Header (SFH) that is transmitted through a first frame within each superframe.

14. The method as claimed in claim 8 , wherein the PA preamble and the SA preamble are a series of predefined symbols for use in synchronization and equalization, and wherein the PA preamble provides basic BS information, and the SA preamble provides additional BS information.

15. An apparatus of a Base Station (BS) for transmitting a reference signal for positioning in a wireless communication system, the apparatus comprising:

a controller for locating a Primary Advance (PA) preamble in a first symbol of a second frame among frames constituting each of multiple superframes, for locating a Secondary Advance (SA) preamble in first symbols of first and third frames among the frames constituting each of the multiple superframes, for determining a plurality of consecutive first superframes belonging to a Location-Based Service (LBS) zone from among the multiple superframes, for including a reference signal for LBS in a first symbol of a first subframe of a last frame among frames constituting each of the first superframes, and for including data in a first symbol of a first subframe of a last frame among frames constituting each of second superframes, which correspond to the multiple superframes excluding the first superframes, when the data is to be transmitted; and

a transmitter for communicating with a Mobile Station (MS) by using the first and second superframes, under a control of the controller.

16. The apparatus as claimed in claim 15 , wherein the controller transmits the reference signal in a frame with a superframe number that, according to a predetermined rule, has relevance to a Base Station IDentifier (BS-ID) of a Base Station (BS) transmitting the reference signal, and waits without transmitting the reference signal in a frame with the superframe number that has no relevance to the BS-ID.

17. The apparatus as claimed in claim 15 , wherein the reference signal is used for a Mobile Station (MS) to estimate a location thereof, or is reported to a BS or a location server through a message predetermined by the MS.

18. The apparatus as claimed in claim 15 , wherein the transmitter transmits a control message including information indicating whether LBS zone transmission is switched on.

19. The apparatus as claimed in claim 18 , wherein the information indicating whether the LBS zone transmission is switched on includes a period of the LBS zone.

20. The apparatus as claimed in claim 19 , wherein the control message comprises a SuperFrame Header (SFH) that is transmitted through a first frame within each superframe.

21. The apparatus as claimed in claim 15 , wherein the PA preamble and the SA preamble are a series of predefined symbols for use in synchronization and equalization, and wherein the PA preamble provides basic BS information, and the SA preamble provides additional BS information.

22. An apparatus of a Mobile Station (MS) for receiving a reference signal for positioning in a wireless communication system, the apparatus comprising:

a receiver for receiving the reference signal; and

a controller for detecting a Primary Advanced (PA) preamble from a first symbol of a second frame among frames constituting each of the multiple superframes, for detecting a Secondary Advance (SA) preamble from first symbols of first and third frames among the frames constituting each of the multiple superframes, for determining a plurality of consecutive first superframes belonging to a Location-Based Service (LBS) zone from among the multiple superframes when the LBS zone is enabled, for detecting the reference signal for LBS from a first symbol of a first subframe of a last frame among frames constituting each of the first superframes, and for detecting data from a first symbol of a first subframe of a last frame among frames constituting each of second superframes, which correspond to the multiple superframes excluding the first superframes, when the data is to be received.

23. The apparatus as claimed in claim 22 , wherein the controller controls the receiver to receive the reference signal in a frame with a superframe number having predetermined relevance to a Base Station IDentifier (BS-ID) of a Base Station (BS) to be measured.

24. The apparatus as claimed in claim 22 , wherein the reference signal is used for a MS to estimate a location thereof, or is reported to a Base Station (BS) or a location server through a message predetermined by the MS.

25. The apparatus as claimed in claim 22 , wherein the receiver receives a control message including information indicating whether LBS zone transmission is switched on.

26. The apparatus as claimed in claim 25 , wherein the information indicating whether the LBS zone transmission is switched on includes a period of the LBS zone.

27. The apparatus as claimed in claim 26 , wherein the control message comprises a SuperFrame Header (SFH) that is transmitted through a first frame within each superframe.

28. The apparatus as claimed in claim 22 , wherein the PA preamble and the SA preamble are a series of predefined symbols for use in synchronization and equalization, and wherein the PA preamble provides basic BS information, and the SA preamble provides additional BS information.