Method and device for performing handover in mobile communication system

• US 10,517,025 B2
• Filed: 05/30/2016
• Issued: 12/24/2019
• 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
• Primary Examiner(s): Duong, Christine T
• Application Number:
  US15/168,173
• Publication Number:
  US 20160277983A1
• Time in Patent Office: 1,303 Days
• Field of Search: None
• 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 by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, from a base station, a control message including interruption information, the interruption information indicating whether the UE is allowed to cause an interruption to a serving cell;

identifying whether a measurement cycle for a deactivated secondary cell (SCell) is less than a predetermined value; and

determining whether the interruption to the serving cell is allowed based on the interruption information and the identification result in a case that the UE performs a measurement of the deactivated SCell.

2. The method according to claim 1, further comprising:

allowing the interruption to the serving cell based on the interruption information being set to a first value and the identification result; and

not allowing the interruption to the serving cell based on the interruption information being set to a second value and the identification result.

3. The method according to claim 1, wherein the interruption to the serving cell is associated with not performing at least one of a preamble transmission for the serving cell, a physical uplink control channel (PUCCH) transmission for the serving cell, a physical hybrid ARQ indicator channel (PHICH) reception for the serving cell, a physical uplink shared channel (PUSCH) transmission for the serving cell, and a sounding reference signal (SRS) transmission for the serving cell.

4. The method according to claim 1, further comprising:

transmitting, to the base station, UE capability information associated with the interruption to the serving cell.

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

generating a control message including interruption information, the interruption information indicating whether a user equipment (UE) is allowed to cause an interruption to a serving cell; and

transmitting, to the UE, the control message including the interruption information,

wherein a measurement cycle for a deactivated secondary cell (SCell) is compared to a predetermined value by the UE, and

wherein it is determined whether the interruption to the serving cell is allowed based on the interruption information and the comparison result in a case that the UE performs a measurement of the deactivated SCell.

6. The method according to claim 5,

wherein the interruption to the serving cell is allowed to be caused, based on the interruption information being set to a first value and the comparison result;

and

wherein the interruption to the serving cell is not allowed to be caused, based on the interruption information being set to a second value and the comparison result.

7. The method according to claim 5, wherein the interruption to the serving cell is associated with not performing at least one of a preamble transmission for the serving cell, a physical uplink control channel (PUCCH) transmission for the serving cell, a physical hybrid ARQ indicator channel (PHICH) reception for the serving cell, a physical uplink shared channel (PUSCH) transmission for the serving cell, and a sounding reference signal (SRS) transmission for the serving cell.

8. The method according to claim 5, further comprising:

receiving, from the UE, UE capability information associated with the interruption to the serving cell.

9. A user equipment (UE) in a wireless communication system, the UE comprising:

a transceiver; and

a controller coupled with the transceiver and configured to control to;

receive, from a base station, a control message including interruption information, the interruption information indicating whether the UE is allowed to cause an interruption to a serving cell,

identify whether a measurement cycle for a deactivated secondary cell (SCell) is less than a predetermined value, and

determine whether the interruption to the serving cell is allowed based on the interruption information and the identification result in a case that the UE performs a measurement of the deactivated SCell.

10. The UE according to claim 9, wherein the controller is configured to allow the interruption to the serving cell based on the interruption information being set to a first value and the identification result, and

wherein the controller is configured to not allow the interruption to the serving cell based on the interruption information being set to a second value and the identification result.

11. The UE according to claim 9, wherein the interruption to the serving cell is associated with not performing at least one of a preamble transmission for the serving cell, a physical uplink control channel (PUCCH) transmission for the serving cell, a physical hybrid ARQ indicator channel (PHICH) reception for the serving cell, a physical uplink shared channel (PUSCH) transmission for the serving cell, and a sounding reference signal (SRS) transmission for the serving cell.

12. The UE according to claim 9, wherein the controller is configured to transmit, to the base station, UE capability information associated with the interruption to the serving cell.

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

a transceiver; and

a controller coupled with the transceiver and configured to;

control to generate a control message including interruption information, the interruption information indicating whether a user equipment (UE) is allowed to cause an interruption to a serving cell, and

transmit, to the UE, the control message including the interruption information,

wherein a measurement cycle for a deactivated secondary cell (SCell) is compared to a predetermined value by the UE, and

wherein it is determined whether the interruption to the serving cell is allowed based on the interruption information and the comparison result in a case that the UE performs a measurement of the deactivated SCell.

14. The base station according to claim 13,

wherein the interruption to the serving cell is allowed to be caused, based on the interruption information being set to a first value and the comparison result;

and

wherein the interruption to the serving cell is not allowed to be caused, based on the interruption information being set to a second value and the comparison result.

15. The base station according to claim 13, wherein the interruption to the serving cell is associated with not performing at least one of a preamble transmission for the serving cell, a physical uplink control channel (PUCCH) transmission for the serving cell, a physical hybrid ARQ indicator channel (PHICH) reception for the serving cell, a physical uplink shared channel (PUSCH) transmission for the serving cell, and a sounding reference signal (SRS) transmission for the serving cell.

16. The base station according to claim 13, wherein the controller is configured to receive, from the UE, UE capability information associated with the interruption to the serving cell.