METHOD FOR ACTIVATING PSCELL AND SCELL IN MOBILE COMMUNICATION SYSTEM SUPPORTING DUAL CONNECTIVITY

• US 20150327107A1
• Filed: 05/07/2015
• Published: 11/12/2015
• Est. Priority Date: 05/08/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Soenghun, VAN LIESHOUT, Gert-Jan, KIM, Sangbum, JANG, Jaehyuk, JEONG, Kyeongin
• Granted Patent: US 10,141,983 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

The present disclosure relates to communication methods and systems for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system utilizing technology for Internet of Things (IoT). The present disclosure is applicable to intelligent services utilizing 5G communication technology and IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A Secondary Cell (SCell) method and apparatus for activating an SCell are provided for use in a mobile communication system supporting dual connectivity. The method includes receiving a control message instructing activation of at least one SCell, determining whether the SCell is a primary SCell (pSCell) based on the control message, monitoring, when the SCell is the pSCell, a Physical Downlink Control Channel (PDCCH) of the pSCell, and reporting, after starting PDCCH monitoring, Channel Status Information (CSI) for the SCell.

Claims

1. A Secondary Cell (SCell) activation method of a terminal supporting dual connectivity, the method comprising:

receiving a control message instructing activation of at least one SCell;

determining whether the SCell is a primary SCell (pSCell) based on the control message;

monitoring, when the SCell is the pSCell, a Physical Downlink Control Channel (PDCCH) of the pSCell; and

reporting, after starting PDCCH monitoring, Channel Status Information (CSI) for the SCell.

2. The method of claim 1, further comprising:

reporting, when the SCell is not the pSCell, the CSI for the SCell; and

monitoring, after reporting the CSI, the PDCCH of the SCell.

3. The method of claim 1, wherein the monitoring of the PDCCH starts at one of a subframe in which the terminal starts transmitting a random access preamble through the pSCell, a subframe in which the User Equipment (UE) receives a valid random access response message through the pSCell, a subframe after a predetermined time elapses since a subframe in which a valid random access response message is received through the pSCell.

4. The method of claim 3, wherein the predetermined time is 6 subframes.

5. The method of claim 1, wherein the reporting of the CSI starts at a first subframe reserved for CSI report for the SCell after detecting a System Frame Number (SFN) of the pSCell.

6. A Secondary Cell (SCell) activation apparatus of a terminal supporting dual connectivity, the apparatus comprising:

a transceiver configured to communicate with at least one network node; and

a controller configured to control the transceiver to receive a control message instructing activation of at least one SCell, to determine whether the SCell is a primary SCell (pSCell) based on the control message, to monitor, when the SCell is the pSCell, a Physical Downlink Control Channel (PDCCH) of the pSCell, and to report, after starting PDCCH monitoring, Channel Status Information (CSI) for the SCell.

7. The apparatus of claim 6, wherein the control unit is configured to report, when the SCell is not the pSCell, the CSI for the SCell and monitors, after reporting the CSI, the PDCCH of the SCell.

8. The apparatus of claim 6, wherein the controller is configured to start monitoring the PDCCH at one of a subframe in which the terminal starts transmitting a random access preamble through the pSCell, a subframe in which the User Equipment (UE) receives a valid random access response message through the pSCell, and a subframe after a predetermined time elapses since a subframe in which a valid random access response message is received through the pSCell.

9. The apparatus of claim 8, wherein the predetermined time is 6 subframes.

10. The apparatus of claim 6, wherein the controller is configured to report the CSI at a first subframe reserved for CSI report for the SCell after detecting a System Frame Number (SFN) of the pSCell.