METHOD AND DEVICE FOR PERFORMING HANDOVER IN MOBILE COMMUNICATION SYSTEM

• US 20200137647A1
• Filed: 12/23/2019
• Published: 04/30/2020
• Est. Priority Date: 08/14/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Soeng Hun, VAN LIESHOUT, Gert Jan, KIM, Sang Bum
• Granted Patent: US 11,064,407 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0079 in case of hand-off failure or rejection
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/0094 Definition of hand-off measurement parameters
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 36/305 Handover due to radio link failure control signalling for hand-off failure H04W36/0079
• CPC Class Codes: H04W 36/38 by fixed network equipment
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for transmitting a channel state by a terminal in a communication system, according to one embodiment, comprises the steps of: receiving discontinuous reception (DRX) configuration information from a base station; determining whether the terminal is set to transmit channel state information only in onDuration according to a DRX operation; determining whether an arbitrary subframe to be received is a subframe included in onDuration if the terminal is set to transmit the channel state information only in onDuration according to the configuration; and not transmitting the channel state information on the arbitrary subframe if the arbitrary subframe is not a subframe included in onDuration. According to the embodiment, the terminal can efficiently report channel state information.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising:

receiving, from a base station, measurement configuration information;

performing a measurement for a system frame number (SFN) offset and a frame offset, in case that information, included in the measurement configuration information, indicates that the terminal is required to perform the measurement for the SFN offset and the frame offset; and

transmitting, to the base station, a measurement result including information associated with the SFN offset which indicates a difference between a first SFN of a first cell and a second SFN of a second cell and information associated with the frame offset which indicates a difference between a first frame of the first cell and a second frame of the second cell.

2. The method of claim 1, wherein a procedure associated with a transmission of the measurement result is initiated immediately, in case that the terminal obtains the information associated with the SFN offset available.

3. The method of claim 1, wherein a procedure associated with a transmission of the measurement result is initiated, in case that a predetermined timer associated with the SFN offset expires.

4. The method of claim 1, wherein the measurement configuration information includes information indicating at least one cell for the measurement for the SFN offset, and

wherein the measurement results includes a physical cell identity of the second cell.

5. The method of claim 1, wherein the second SFN of the second cell is obtained based on master information block (MIB) of the second cell.

6. A terminal in a wireless communication system, the terminal comprising:

a transceiver; and

a controller coupled with the transceiver and configured to;

receive, from a base station, measurement configuration information,

perform a measurement for a system frame number (SFN) offset and a frame offset, in case that information, included in the measurement configuration information, indicates that the terminal is required to perform the measurement for the SFN offset and the frame offset, and

transmit, to the base station, a measurement result including information associated with the SFN offset which indicates a difference between a first SFN of a first cell and a second SFN of a second cell and information associated with the frame offset which indicates a difference between a first frame of the first cell and a second frame of the second cell.

7. The terminal of claim 6, wherein a procedure associated with a transmission of the measurement result is initiated immediately, in case that the terminal obtains the information associated with the SFN offset available.

8. The terminal of claim 6, wherein a procedure associated with a transmission of the measurement result is initiated, in case that a predetermined timer associated with the SFN offset expires.

9. The terminal of claim 6, wherein the measurement configuration information includes information indicating at least one cell for the measurement for the SFN offset, and

wherein the measurement results includes a physical cell identity of the second cell.

10. The terminal of claim 6, wherein the second SFN of the second cell is obtained based on master information block (MIB) of the second cell.

11. A method performed by a base station in a wireless communication system, the method comprising:

transmitting, to a terminal, measurement configuration information; and

receiving, from the terminal, a measurement result including information associated with a system frame number (SFN) offset which indicates a difference between a first SFN of a first cell and a second SFN of a second cell and information associated with a frame offset which indicates a difference between a first frame of the first cell and a second frame of the second cell,

wherein a measurement for the SFN offset and the frame offset is performed, in case that information, included in the measurement configuration information, indicates that the terminal is required to perform the measurement for the SFN offset and the frame offset.

12. The method of claim 11, wherein a procedure associated with a transmission of the measurement result is initiated immediately, in case that the terminal obtains the information associated with the SFN offset available.

13. The method of claim 11, wherein a procedure associated with a transmission of the measurement result is initiated, in case that a predetermined timer associated with the SFN offset expires.

14. The method of claim 11, wherein the measurement configuration information includes information indicating at least one cell for the measurement for the SFN offset, and

wherein the measurement results includes a physical cell identity of the second cell.

15. The method of claim 11, wherein the second SFN of the second cell is obtained based on master information block (MIB) of the second cell.

16. A base station in a wireless communication system, the base station comprising:

a transceiver; and

a controller coupled with the transceiver and configured to;

transmit, to a terminal, measurement configuration information, and

receive, from the terminal, a measurement result including information associated with a system frame number (SFN) offset which indicates a difference between a first SFN of a first cell and a second SFN of a second cell and information associated with a frame offset which indicates a difference between a first frame of the first cell and a second frame of the second cell,

wherein a measurement for the SFN offset and the frame offset is performed, in case that information, included in the measurement configuration information, indicates that the terminal is required to perform the measurement for the SFN offset and the frame offset.

17. The base station of claim 16, wherein a procedure associated with a transmission of the measurement result is initiated immediately, in case that the terminal obtains the information associated with the SFN offset available.

18. The base station of claim 16, wherein a procedure associated with a transmission of the measurement result is initiated, in case that a predetermined timer associated with the SFN offset expires.

19. The base station of claim 16, wherein the measurement configuration information includes information indicating at least one cell for the measurement for the SFN offset, and

wherein the measurement results includes a physical cell identity of the second cell.

20. The base station of claim 16, wherein the second SFN of the second cell is obtained based on master information block (MIB) of the second cell.