METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING REFERENCE SIGNAL FOR POSITIONING IN WIRELESS COMMUNICATION SYSTEM

• US 20110103307A1
• Filed: 10/26/2010
• Published: 05/05/2011
• Est. Priority Date: 11/05/2009
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: WON, Jin-Hee, KANG, Hee-Won, CHO, Jae-Weon, KIM, Sang-Heon
• Granted Patent: US 8,503,352 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: G01S 1/0428 Signal details
• CPC Class Codes: G01S 5/0226 Transmitters
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A method and apparatus for transmitting/receiving a reference signal for positioning in a wireless communication system are provided. In the method, a BS locates a PA preamble in a second frame among frames constituting each of multiple superframes, locates a SA preamble in first symbols of first and third frames among the frames constituting each of the multiple superframes, determines multiple consecutive first superframes belonging to an LBS zone from among the multiple superframes, includes 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, includes 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 when the data is to be transmitted, and communicates with an MS by using the first and second superframes.

Claims

1. A method of transmitting a reference signal for positioning in a wireless communication system, the method comprising:

locating a Primary Advance (PA) preamble in 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 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;

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 a Mobile Station (MS) by using the first and second superframes.

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

carrying information indicating a period of the LBS zone in a control message; and

transmitting the control message with the information carried therein.

3. The method as claimed in claim 2, wherein the control message comprises a SuperFrame Header (SFH) that is transmitted through a first frame within each superframe.

4. The method as claimed in claim 1, wherein the determining of the first superframes comprises:

determining a superframe number of a first superframe located firstly in the LBS zone by using information on the LBS zone, which is provided through a control message; and

determining a predetermined number of superframes starting from the first superframe as the first superframes.

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

transmitting the reference signal in a frame with a frame 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 a frame number that has no relevance to the BS-ID.

6. 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.

7. A method of receiving a reference signal for positioning in a wireless communication system, the method comprising:

detecting a Primary Advanced (PA) preamble from 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;

detecting a 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.

8. The method as claimed in claim 7, further comprising:

receiving an LBS zone transmission parameter indicating a period of the LBS zone through a control message.

9. The method as claimed in claim 8, wherein the control message comprises a SuperFrame Header (SFH) that is transmitted through a first frame within each superframe.

10. The method as claimed in claim 7, wherein the determining of the first superframes comprises:

determining a superframe number of a first superframe located firstly in the LBS zone by using information on the LBS zone, which is provided through a control message; and

determining a predetermined number of superframes starting from the first superframe as the first superframes.

11. The method as claimed in claim 7, further comprising:

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

12. The method as claimed in claim 7, 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.

13. A Base Station (BS) apparatus 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 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 transceiver for communicating with a Mobile Station (MS) by using the first and second superframes, under a control of the controller.

14. The BS apparatus as claimed in claim 13, wherein the controller generates information indicating a period of the LBS zone, carries the information related to LBS in a control message, and transmits the control message with the information carried therein through the transceiver.

15. The BS apparatus as claimed in claim 14, wherein the control message comprises a SuperFrame Header (SFH) that is transmitted through a first frame within each superframe.

16. The BS apparatus as claimed in claim 13, wherein the controller determines a superframe number of a first superframe located firstly in the LBS zone by using information on the LBS zone, which is provided through a control message, and determines a predetermined number of superframes starting from the first superframe as the first superframes.

17. The BS apparatus as claimed in claim 13, wherein the controller transmits the reference signal in a frame with a frame 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 a frame number that has no relevance to the BS-ID.

18. The BS apparatus as claimed in claim 13, 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.

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

a transceiver for transmitting/receiving multiple superframes; and

a controller for detecting a Primary Advanced (PA) preamble from 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 a 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.

20. The MS apparatus as claimed in claim 19, wherein the controller receives a control message through the transceiver, and acquires an LBS zone transmission parameter indicating a period of the LBS zone from the control message.

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

22. The MS apparatus as claimed in claim 19, wherein the controller determines a superframe number of a first superframe located firstly in the LBS zone by using information on the LBS zone, which is provided through a control message, and determines a predetermined number of superframes starting from the first superframe as the first superframes.

23. The MS apparatus as claimed in claim 19, wherein the controller controls the transceiver to receive the reference signal in a frame with a frame number having predetermined relevance to a Base Station IDentifier (BS-ID) of a Base Station (BS) to be measured.

24. The MS apparatus as claimed in claim 19, wherein the reference signal is used for the MS apparatus to estimate a location thereof, or is reported to a BS or a location server through a message predetermined by the MS.