Method for supporting dual connectivity and device using same

• US 10,104,709 B2
• Filed: 05/28/2015
• Issued: 10/16/2018
• Est. Priority Date: 05/29/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ahn, Joonkui, Yi, Yunjung
• Primary Examiner(s): NGUYEN, MINH TRANG T
• Application Number:
  US15/310,724
• Publication Number:
  US 20170086242A1
• Time in Patent Office: 1,237 Days
• CPC Class Codes: H04B 7/02 Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas RAKE receivers H04B1/7115
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0628 Diversity capabilities
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities

Abstract

Provided is a method and device for supporting a dual connectivity in a wireless communication system. A wireless device provides, to a base station, a device capability message including information on a dual connectivity band combination supporting the dual connectivity. The wireless device supports multiple timing advances (TAs) for the dual connectivity band combination.

Claims

1. A method for supporting a dual connectivity in a wireless communication system, the method comprising:

providing, by a wireless device, a base station with a device capability message including device capability information regarding a combination of dual connectivity bands for which the dual connectivity is supported; and

performing, by the wireless device, the dual connectivity through at least two cell groups, including a master cell group (MCG) and a secondary cell group (SCG), in a band within the combination of the dual connectivity bands,

wherein the capability information further includes first information, second information, third information, and fourth information,

wherein the first information indicates that simultaneous transmission of a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) is supported for the dual connectivity bands or the combination of the dual connectivity bands,

wherein the second information indicates that multiple timing advances (TAs) are supported for the dual connectivity bands or the combination of the dual connectivity bands,

wherein the third information indicates that simultaneous transmission and reception in different bands is supported for the combination of the dual connectivity bands including a time division duplex (TDD) band, and

wherein the fourth information indicates that the simultaneous transmission and reception is supported between a band belonging to the MCG and a band belonging to the SCG.

2. The method of claim 1, wherein the MCG is operated by the base station.

3. The method of claim 1, wherein the SCG is operated by another base station different from the base station.

4. The method of claim 1, wherein different TAs are applied to a cell belonging to the MCG and a cell belonging to the SCG.

5. The method of claim 1, further comprising:

receiving, from the base station, a connection request message for requesting a connection to one of cells belonging to the SCG.

6. The method of claim 5, further comprising:

transmitting, to the cell for which the connection is requested, a random access preamble for performing synchronization.

7. The method of claim 6, wherein the connection request message includes information regarding the random access preamble.

8. A device for supporting a dual connectivity in a wireless communication system, the device comprising:

a transceiver configured to transmit and receive a radio signal; and

a processor operatively coupled to the transceiver and configured to;

provide a base station with a device capability message including device capability information regarding a combination of dual connectivity bands for which the dual connectivity is supported; and

perform the dual connectivity through at least two cell groups, including a master cell group (MCG) and a secondary cell group (SCG), in a band within the combination of the dual connectivity bands,

wherein the capability information further includes first information, second information, third information, and fourth information,

wherein the first information indicates that simultaneous transmission of a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) is supported for the dual connectivity bands or the combination of the dual connectivity bands,

wherein the second information indicates that multiple timing advances (TAs) are supported for the dual connectivity bands or the combination of the dual connectivity bands,

wherein the third information indicates that simultaneous transmission and reception in different bands is supported for the combination of the dual connectivity bands including a time division duplex (TDD) band, and

wherein the fourth information indicates that the simultaneous transmission and reception is supported between a band belonging to the MCG and a band belonging to the SCG.