METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA USING PLURALITY OF CARRIERS IN MOBILE COMMUNICATION SYSTEM

• US 20180367281A1
• Filed: 07/30/2018
• Published: 12/20/2018
• Est. Priority Date: 01/29/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Soeng-Hun, VAN LIESHOUT, Gert-Jan, JEONG, Kyeong-In
• Granted Patent: US 10,454,649 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• 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 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA

Abstract

The present disclosure relates to a pre-5^th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4^th-Generation (4G) communication system such as long term evolution (LTE). A communication method of a user equipment (UE) in a dual connectivity (DC)-based mobile communication system in which a master cell group (MCG) and a secondary cell group (SCG), the MCG is associated with a master eNB (MeNB) and the SCG is associated with a second eNB (SeNB) is provided. The method includes receiving measurement gap configuration information including a gap offset, determining a first sub-frame of a measurement gap at a system frame number (SFN) of at least one serving cell of the MCG and a sub-frame of the at least one serving cell of the MCG, wherein the SFN and the sub-frame are determined based on the gap offset, and performing a measurement on at least one serving cell at the first sub-frame.

Claims

1. A method for performing a measurement procedure by a user equipment (UE), wherein the UE is in a dual connectivity (DC) with a master cell group (MCG) and a secondary cell group (SCG), the MCG is associated with a master eNB (MeNB) and the SCG is associated with a second eNB (SeNB), the method comprising:

receiving, from the MeNB, measurement gap configuration information including a gap offset;

determining a first sub-frame of a measurement gap at a system frame number (SFN) of at least one serving cell of the MCG and a sub-frame of the at least one serving cell of the MCG, wherein the SFN and the sub-frame are determined based on the gap offset; and

performing a measurement on at least one serving cell at the first sub-frame.

2. The method of claim 1, wherein the measurement gap starts at an ending point of a last sub-frame occurring immediately before the measurement gap among sub-frames of serving cells belonging to the MCG.

3. The method of claim 1, wherein the measurement gap configuration information is received through a radio resource control (RRC) message.

4. The method of claim 1, wherein hybrid automatic repeat request (HARQ) feedback, channel-quality indicator (CQI), channel state information (CSI), and sounding reference signal (SRS) are not transmitted in the sub-frame of the measurement gap.

5. The method of claim 3, wherein the measurement gap is a measurement gap that is common to the MCG and the SCG.

6. The method of claim 1, wherein the first sub-frame is determined according to the following equations:

SFN mod T=FLOOR(gapOffset/10)

T=gap repetition period/10

Subframe=gapOffset mod 10

wherein subframe represents the first sub-frame, gapOffset is information specifying the first sub-frame, SFN is a system frame number of the at least one serving cell of the MCG, and gap repetition period is information indicating a repetition period of the measurement gap.

7. A user equipment (UE) for performing a measurement procedure in a dual connectivity (DC) with a master cell group (MCG) and a secondary cell group (SCG), wherein the MCG is associated with a master eNB (MeNB) and the SCG is associated with a second eNB (SeNB), the UE comprising:

a transceiver; and

a controller configured to control the transceiver, wherein the controller is configured to;

receive, from the MeNB, measurement gap configuration information including a gap offset;

determine a first sub-frame of a measurement gap at a system frame number (SFN) of at least one serving cell of the MCG and a sub-frame of the at least one serving cell of the MCG, wherein the SFN and the sub-frame are determined based on the gap offset; and

perform a measurement on at least one serving cell at the first sub-frame.

8. The UE of claim 7, wherein the measurement gap starts at an ending point of a last sub-frame occurring immediately before the measurement gap among sub-frames of serving cells belonging to the MCG.

9. The UE of claim 7, wherein the measurement gap configuration information is received through a radio resource control (RRC).

10. The UE of claim 7, wherein hybrid automatic repeat request (HARQ) feedback, channel-quality indicator (CQI), channel state information (CSI), and sounding reference signal (SRS) are not transmitted in the sub-frame of the measurement gap.

11. A method by a master eNB (MeNB), wherein a user equipment (UE) is in a dual connectivity (DC) with a master cell group (MCG) and a secondary cell group (SCG), the MCG is associated with the MeNB and the SCG is associated with a second eNB (SeNB), the method comprising:

transmitting, to the UE, measurement gap configuration information including a gap offset,

wherein a first sub-frame of a measurement gap is determined at a system frame number (SFN) of at least one serving cell of the MCG and a sub-frame of the at least one serving cell of the MCG, and

wherein the SFN and the sub-frame are determined based on the gap offset, and

wherein the measurement gap is performed on at least one serving cell at the first sub-frame.

12. The method of claim 11, wherein the measurement gap starts at an ending point of a last sub-frame occurring immediately before the measurement gap among sub-frames of serving cells belonging to the MCG.

13. The method of claim 11, wherein the measurement gap configuration information is transmitted through a radio resource control (RRC) message.

14. The method of claim 11, wherein hybrid automatic repeat request (HARQ) feedback, channel-quality indicator (CQI), channel state information (CSI), and sounding reference signal (SRS) are not received in the sub-frame of the measurement gap.

15. The method of claim 11, wherein the measurement gap is a measurement gap that is common to the MCG and the SCG.

16. The method of claim 11, wherein the first sub-frame is determined according to the following equations:

SFN mod T=FLOOR(gapOffset/10)

T=gap repetition period/10

Subframe=gapOffset mod 10

wherein subframe represents the first sub-frame, gapOffset is information specifying the first sub-frame, SFN is a system frame number of the at least one serving cell of the MCG, and gap repetition period is information indicating a repetition period of the measurement gap.

17. A master eNB (MeNB), wherein a user equipment (UE) is in a dual connectivity (DC) with a master cell group (MCG) and a secondary cell group (SCG), the MCG is associated with the MeNB and the SCG is associated with a second eNB (SeNB), the MeNB comprising:

a transceiver;

a controller configured to control the transceiver,

wherein the controller is configured to transmit, to the UE, measurement gap configuration information including a gap offset, and

wherein a first sub-frame of a measurement gap is determined at a system frame number (SFN) of at least one serving cell of the MCG and a sub-frame of the at least one serving cell of the MCG, and

wherein the SFN and the sub-frame are determined based on the gap offset, and

wherein the measurement gap is performed on at least one serving cell at the first sub-frame.

18. The MeNB of claim 17, wherein the measurement gap starts at an ending point of a last sub-frame occurring immediately before the measurement gap among sub-frames of serving cells belonging to the MCG.

19. The MeNB of claim 17, wherein the measurement gap configuration information is transmitted through a radio resource control (RRC) message.

20. The MeNB of claim 17, wherein hybrid automatic repeat request (HARQ) feedback, channel-quality indicator (CQI), channel state information (CSI), and sounding reference signal (SRS) are not received in the sub-frame of the measurement gap.