METHOD AND APPARATUS FOR DETECTING THE LOCATIONS OF TERMINALS IN A MULTINODE SYSTEM

• US 20140295883A1
• Filed: 09/07/2012
• Published: 10/02/2014
• Est. Priority Date: 09/09/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kang, Ji Won, Chun, Jin Young, Kim, Ki Tae, Kim, Su Nam, Ihm, Bin Chul, Park, Sung Ho
• Granted Patent: US 9,955,449 B2
• Time in Patent Office: Days
• US Class Current: 455/456.1
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: G01S 5/0295 Proximity-based methods, e.g. position inferred from reception of particular signals
• CPC Class Codes: G01S 5/10 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega or decca systemsG01S5/12 takes precedence ; beacons and receivers cooperating therewith G01S1/306, G01S1/308
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04B 7/0684 using different training sequences per antenna
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Provided are a method and an apparatus for detecting the locations of terminals in a multi-node system. A plurality of nodes transmit location reference signals which are distinguished by node, and a terminal performs feedback of channel information on each node using the location reference signals. Various signaling for detecting the locations of the terminals may be performed for each node, that is, for each point, rather than cell-based signaling.

Claims

1. A method of operating a terminal for positioning the terminal in a multi-node system including a base station and a plurality of nodes wiredly connected with the base station, the method comprising:

receiving a reference signal generated based on a global point identifier (GPI) from each of the plurality of nodes;

generating channel information on each of the plurality of nodes by measuring the reference signal; and

transmitting the channel information to the base station,

wherein the base station and the plurality of nodes have the same physical cell ID, wherein the physical cell ID is a cell ID indicated by a synchronization signal transferred from the base station and the plurality of nodes, wherein the global point ID is an ID distinctly assigned to each of the plurality of nodes and is used to generate a sequence used for the reference signal, and is provided in addition to the physical cell ID.

2. The method of claim 1, wherein the sequence used for the reference signal is generated based on the physical cell ID and the global point ID and is assigned to different frequency resources depending on the global point ID.

3. The method of claim 1, wherein the reference signal is a positioning reference signal sent for positioning the terminal.

4. The method of claim 1, wherein the channel information is information indicating an arrival time of a reference signal received from a reference point and an arrival time of a reference signal received from a neighbor point after one of the plurality of nodes is set as the reference point and at least one node of the remaining nodes is set as the neighbor point.

5. The method of claim 4, further comprising receiving a higher layer signal indicating the reference point and the neighbor point.

6. The method of claim 1, wherein the global point ID has a value different from the physical cell ID.

7. A method of positioning a terminal in a multi-node system including a base station and a plurality of nodes wiredly connected with the base station, the method comprising:

assigning global point IDs to the plurality of nodes, the global point IDs used to send a positioning reference signal used for grasping a location of the terminal;

sending the positioning reference signal using a corresponding global point ID in each of the plurality of nodes;

receiving channel information measured using the positioning reference signal from the terminal; and

estimating the location of the terminal based on the channel information,

wherein the base station and the plurality of nodes have the same physical cell ID, wherein the physical cell ID is a cell ID indicated by a synchronization signal transferred from the base station and the plurality of nodes and is used for a cell-specific reference signal (CRS) provided to a plurality of terminals including the terminal, and wherein the global point ID is configured as a distinct value for each of the plurality of nodes and is used to send the positioning reference signal instead of the physical cell ID.

8. The method of claim 7, wherein the channel information is information indicating an arrival time of a reference signal received from a reference point and an arrival time of a reference signal received from a neighbor point after one of the plurality of nodes is set as the reference point and at least one node of the remaining nodes is set as the neighbor point.

9. A method of operating a terminal for positioning the terminal in a multi-node system including a base station and a plurality of nodes wiredly connected with the base station, the method comprising:

receiving a reference signal generated based on a different physical cell ID (PCI) from each of the plurality of nodes;

generating channel information on each of the plurality of nodes by measuring the reference signal; and

transmitting the channel information to the base station,

wherein each of the plurality of nodes has a first PCI that is the same physical cell ID as the base station and a second PCI that is distinct from the first PCI, and wherein the second PCI is used only for resource mapping and a sequence of the reference signal.

10. A method of operating a terminal for positioning the terminal in a multi-node system including a base station and a plurality of nodes wiredly connected with the base station, the method comprising:

receiving a distinct reference signal from each of the plurality of nodes;

generating channel information on each of the plurality of nodes by measuring the reference signal; and

transmitting the channel information to the base station,

wherein the reference signal received from each of the plurality of nodes uses a sequence generated based on the same physical cell ID as the base station and is mapped with a different time and frequency resource.

11. The method of claim 10, further comprising receiving a reference signal configuration index from the base station, wherein the reference signal configuration index indicates a radio resource mapped with the reference signal.

12. A terminal operating in a multi-node system including a base station and a plurality of nodes wiredly connected with the base station, the terminal comprising:

an RF unit transmitting and receiving a radio signal; and

a processor connected with the RF unit,

wherein the processor receives a reference signal generated based on a global point ID (GPI) from each of the plurality of nodes, generates channel information on each of the plurality of nodes by measuring the reference signal, and transmitting the channel information to the base station, wherein the base station and the plurality of nodes have the same physical cell ID, wherein the physical cell ID is a cell ID indicated by a synchronization signal transferred from the base station and the plurality of nodes, wherein the global point ID is an ID distinctly assigned to each of the plurality of nodes and is used to generate a sequence used for the reference signal, and is provided in addition to the physical cell ID.

13. The terminal of claim 12, wherein the sequence used for the reference signal is generated based on the physical cell ID and the global point ID and is assigned to different frequency resources depending on the global point ID.

14. The terminal of claim 12, wherein the reference signal is a positioning reference signal sent for positioning the terminal.

15. The terminal of claim 12, wherein the channel information is information indicating an arrival time of a reference signal received from a reference point and an arrival time of a reference signal received from a neighbor point after one of the plurality of nodes is set as the reference point and at least one node of the remaining nodes is set as the neighbor point.

16. The terminal of claim 15, wherein the processor further receives a higher layer signal indicating the reference point and the neighbor point.

17. The terminal of claim 12, wherein the global point ID has a value different from the physical cell ID.