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

• US 10,484,936 B2
• Filed: 12/03/2018
• Issued: 11/19/2019
• 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 N
• Application Number:
  US16/207,645
• Publication Number:
  US 20190104466A1
• Time in Patent Office: 351 Days
• 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 method of a terminal in a mobile communication system, the method comprising:

receiving, from a base station, a configuration message for a synchronization signal transmitted from a neighbor cell;

measuring the synchronization signal transmitted from the neighbor cell based on the configuration message; and

transmitting, to the base station, a measurement report including a measurement result on the synchronization signal,

wherein the configuration message includes information on a signal transmission timing indicating a transmission period and a timing offset of the synchronization signal.

2. The method of claim 1, wherein the synchronization signal is transmitted on a radio frame of system frame number n, and wherein a first value based on modular operation with the system frame number n and the transmission period corresponds to a second value indicated by the timing offset.

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

4. The method of claim 1, wherein the transmission period includes at least one of a period of 10 ms, 20 ms, 40 ms, 80 ms, or 160 ms.

5. A method of a base station in a mobile communication system, the method comprising:

identifying configuration information of a synchronization signal of a neighbor cell;

transmitting, to a terminal, a configuration message including the configuration information;

receiving, from the terminal, a measurement report including a measurement result of the synchronization signal transmitted from the neighbor cell according to the configuration information;

wherein the configuration information includes information on a signal transmission timing indicating a transmission period and a timing offset of the synchronization signal.

6. The method of claim 5,

wherein the synchronization signal is transmitted on a radio frame of system frame number n, and

wherein a first value based on modular operation with the system frame number n and the transmission period corresponds to a second value indicated by the timing offset.

7. The method of claim 5, wherein a reference timing for the timing offset is a serving cell timing of the base station.

8. The method of claim 5, wherein the transmission period includes at least one of a period of 10 ms, 20 ms, 40 ms, 80 ms, or 160 ms.

9. A terminal in a mobile communication system, the terminal comprising:

a transceiver; and

a controller configured to;

control the transceiver to receive, from the base station, a configuration message for a synchronization signal transmitted from a neighbor cell,

measure the synchronization signal transmitted from the neighbor cell based on the configuration message, and

control the transceiver to transmit, to the base station, a measurement report including a measurement result of the synchronization signal,

wherein the configuration message includes information on a signal transmission timing indicating a transmission period and a timing offset of the synchronization signal.

10. The terminal of claim 9,

wherein the synchronization signal is transmitted on a radio frame of system frame number n, and

wherein a first value based on modular operation with the system frame number n and the transmission period corresponds to a second value indicated by the timing offset.

11. The terminal of claim 9, wherein a reference timing for the timing offset is a serving cell timing of the base station.

12. The terminal of claim 9, wherein the transmission period includes at least one of a period of 10 ms, 20 ms, 40 ms, 80 ms, or 160 ms.

13. A base station in a mobile communication system, the base station comprising:

a transceiver; and

a controller configured to control to;

identify configuration information of a synchronization signal of a neighbor cell,

control the transceiver to transmit, to the terminal, a configuration message including the configuration information, and

control the transceiver to receive, from the terminal, a measurement report including a measurement result of the synchronization signal transmitted from the neighbor cell according to the configuration information,

wherein the configuration information includes information on a signal transmission timing indicating a transmission period and a timing offset of the synchronization signal.

14. The base station of claim 13,

wherein the synchronization signal is transmitted on a radio frame of system frame number n, and

wherein a first value based on modular operation with the system frame number n and the transmission period corresponds to a second value indicated by the timing offset.

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

16. The base station of claim 13, wherein the transmission period includes at least one of a period of 10 ms, 20 ms, 40 ms, 80 ms, or 160 ms.