Discovery signal transmission/reception method and apparatus for use in mobile communication system

• US 9,526,064 B2
• Filed: 12/13/2013
• Issued: 12/20/2016
• Est. Priority Date: 12/14/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Youngbum, Cho, Joonyoung, Kwak, Yongjun, Lee, Juho, Lee, Hyojin, Ji, Hyoungju, Kim, Younsun, Ro, Sangmin, Choi, Seunghoon
• Primary Examiner(s): Zewdu, Meless
• Application Number:
  US14/105,873
• Publication Number:
  US 20140171073A1
• Time in Patent Office: 1,103 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A discovery signal transmission/reception method and an apparatus for improving energy efficiency of the system are provided. The discovery signal transmission method of a base station in a mobile communication system according to the present disclosure includes acquiring a discovery signal configuration of a neighbor cell, transmitting the discovery signal configuration to a terminal, receiving a measurement report including a result of measurement on a discovery signal of the neighbor from the terminal, the measurement being performed based on the discovery signal configuration, and determining whether to make a handover decision for the terminal based on the measurement report. The discovery signal transmission/reception method of the present disclosure is advantageous in improving energy efficiency of a mobile communication system.

Claims

1. A measurement report reception method of a base station in a mobile communication system, the measurement report reception method comprising:

identifying a discovery signal configuration of a neighbor cell;

transmitting the discovery signal configuration to a terminal; and

receiving the measurement report including a result of measurement on a discovery signal that is transmitted from the neighbor cell according to the discovery signal configuration from the terminal,

wherein the discovery signal configuration comprises information on discovery signal transmission timing and information on the discovery signal,

wherein the information on the discovery signal transmission timing indicates a transmission period of the discovery signal and a timing offset of the discovery signal, and

wherein the discovery signal is used to support cell search for the neighbor cell performed by the terminal.

2. The measurement report reception method of claim 1, wherein the discovery signal is transmitted on a radio frame of system frame number n, which is determined based on modular operation with the transmission period and the timing offset.

3. The measurement report reception method of claim 1, wherein a reference timing for the timing offset is a serving cell timing of the base station.

4. The measurement report reception method of claim 1, further comprising:

determining whether to perform a handover to the neighbor cell of the terminal based on the result of the measurement on the discovery signal that is transmitted on the neighbor cell.

5. The measurement report reception method of claim 1, wherein the information on the discovery signal comprises resource mapping information of the discovery signal and sequence information on the discovery signal.

6. A discovery signal reception method of a terminal in a mobile communication system, the discovery signal reception method comprising:

receiving a discovery signal configuration of a neighbor cell from a base station;

measuring a discovery signal that is transmitted from the neighbor cell according to the discovery signal configuration; and

transmitting a measurement report including a measurement result on the discovery signal of the neighbor cell to the base station,

wherein the discovery signal configuration comprises information on discovery signal transmission timing and information on the discovery signal,

wherein the information on the discovery signal transmission timing indicates a transmission period of the discovery signal and a timing offset of the discovery signal, and

wherein the discovery signal is used to support cell search for the neighbor cell performed by the terminal.

7. The discovery signal reception method of claim 6, wherein the discovery signal is transmitted on a radio frame of system frame number n, which is determined based on modular operation with the transmission period and the timing offset.

8. The discovery signal reception method of claim 6, wherein a reference timing for the timing offset is a serving cell timing of the base station.

9. The discovery signal reception method of claim 6, wherein the measurement result on the discovery signal is used by the base station in determining whether to perform a handover to the neighbor cell of the terminal.

10. The discovery signal reception method of claim 6, wherein the information on the discovery signal comprises resource mapping information of the discovery signal and sequence information on the discovery signal.

11. A base station for receiving a measurement report in a mobile communication system, the base station comprising:

a transceiver configured to transmit and receive signals to and from a terminal; and

a controller configured to control to;

identify a discovery signal configuration of a neighbor cell,

control the transceiver to transmit the discovery signal configuration to the terminal, and

receive the measurement report including a result of measurement on a discovery signal which is transmitted from the neighbor cell according to the discovery signal configuration from the terminal,

wherein the discovery signal configuration comprises information on discovery signal transmission timing and information on the discovery signal,

wherein the information on the discovery signal transmission timing indicates a transmission period of the discovery signal and a timing offset of the discovery signal, and

wherein the discovery signal is used to support cell search for the neighbor cell performed by the terminal.

12. The base station of claim 11, wherein the discovery signal is transmitted on a radio frame of system frame number n, which is determined based on modular operation with the transmission period and the timing offset.

13. The base station of claim 11, wherein a reference timing for the timing offset is a serving cell timing of the base station.

14. The base station of claim 11, wherein the controller is further configured to determine whether to perform a handover to the neighbor cell of the terminal based on the result of the measurement on a discovery signal of the neighbor cell.

15. The base station of claim 11, wherein the information on the discovery signal comprises resource mapping information of the discovery signal and sequence information on the discovery signal.

16. A terminal for receiving a discovery signal in a mobile communication system, the terminal comprising:

a transceiver configured to transmit and receive signals to and from a base station; and

a controller configured to control the transceiver to;

receive a discovery signal configuration of a neighbor cell from a base station,

control to measure a discovery signal which is transmitted from the neighbor cell according to the discovery signal configuration, and

control the transceiver to transmit a measurement report including a measurement result on the discovery signal of the neighbor cell to the base station,

wherein the discovery signal configuration comprises information on discovery signal transmission timing,

wherein the information on the discovery signal transmission timing indicates a transmission period of the discovery signal and a timing offset of the discovery signal, and

wherein the discovery signal is used to support cell search for the neighbor cell performed by the terminal.

17. The terminal of claim 16, wherein the discovery signal is transmitted on a radio frame of system frame number n, which is determined based on modular operation with the transmission period and the timing offset.

18. The terminal of claim 16, wherein a reference timing for the timing offset is a serving cell timing of the base station.

19. The terminal of claim 16, wherein the measurement result on the discovery signal is used by the base station to determine whether to perform a handover to the neighbor cell of the terminal.

20. The terminal of claim 16, wherein the information on the discovery signal comprises resource mapping information of the discovery signal and sequence information on the discovery signal.