Method for acquiring system frame number by terminal, terminal, and mobile communication system

• US 10,306,604 B2
• Filed: 11/03/2014
• Issued: 05/28/2019
• Est. Priority Date: 11/01/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Sangbum, Kim, Soenghun, Jeong, Kyeongin, Van Lieshout, Gert Jan, Van Der Velde, Himke
• Primary Examiner(s): Holliday, Jaime M
• Application Number:
  US14/760,386
• Publication Number:
  US 20150358957A1
• Time in Patent Office: 1,667 Days
• Field of Search: 4554321, 4554351, 4554352, 455446, 455448, 455449, 455434
• CPC Class Codes: H04B 7/2603 Arrangements for wireless physical layer control H04B7/2612 takes precedence
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 88/12 Access point controller devices

Abstract

A System Frame Number (SFN) acquisition method is provided. The System Frame Number (SFN) acquisition method of a terminal according to the present invention includes receiving a first message for adding a secondary cell of a secondary base station from a primary cell of a primary base station, receiving a Master Information Block (MIB) broadcast in the secondary cell, and acquiring a SFN information for the secondary cell from the MIB, and applying the SFN information to at least one cell of the secondary base station.

Claims

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

receiving, from a first base station, a dedicated radio resource control (RRC) message for adding at least one secondary cell of a second base station;

receiving, on a primary secondary cell (PSCell) of the second base station, master information;

identifying a system frame number (SFN) based on the received master information; and

applying the identified SFN to communicate with the at least one secondary cell of the second base station,

wherein the dedicated RRC message includes information for the at least one secondary cell except for the SFN.

2. The method of claim 1, wherein the PSCell is configured with a physical uplink control channel (PUCCH) resource.

3. The method of claim 1,

wherein a master cell group (MCG) is controlled by the first base station, and

wherein a secondary cell group (SCG) is controlled by the second base station.

4. The method of claim 1, wherein a timing of the SFN associated with the at least one secondary cell of the second base station is different from a time of an SFN associated with at least one cell of the first base station.

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

determining to add at least one secondary cell including a primary secondary cell (PSCell) having a physical uplink control channel (PUCCH) resource, of the second base station; and

transmitting, on the PSCell to a terminal which is connected to a first base station by a first cell, master information including a system frame number (SFN) which is applied to communicate with the at least one secondary cell of the second base station,

wherein a dedicated radio resource control (RRC) message which is transmitted from the first base station to the terminal for adding the at least one secondary cell to the terminal includes information for the at least one secondary cell except for the SFN.

6. The method of claim 5,

wherein a secondary cell group (SCG) is controlled by the second base station, and

wherein a master cell group (MCG) is controlled by the first base station.

7. The method of claim 5, wherein a timing of the SFN associated with the at least one secondary cell of the second base station is different from a time of an SFN associated with at least one cell of the first base station.

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

determining to add at least one secondary cell of a second base station to a terminal which is connected to a first cell of the first base station; and

transmitting, to the terminal, a dedicated radio resource control (RRC) message for adding the at least one secondary cell of the second base station, wherein the dedicated RRC message includes information for the at least one secondary cell except for a system frame number (SFN),

wherein the SFN which is applied to the at least one secondary cell of the second base station is transmitted to the terminal on a primary secondary cell (PSCell) of the second base station.

9. The method of claim 8, wherein the PSCell is configured with a physical uplink control channel (PUCCH) resource.

10. The method of claim 8,

wherein a master cell group (MCG) is controlled by the first base station, and

wherein a secondary cell group (SCG) is controlled by the second base station.

11. The method of claim 8, wherein a timing of the SFN associated with the at least one secondary cell of the second base station is different from a time of an SFN associated with at least one cell of the first base station.

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

a transceiver; and

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

receive, from a first base station, a dedicated radio resource control (RRC) message for adding at least one secondary cell of a second base station,

receive, on a primary secondary cell (PSCell) of the second base station, master information,

identify a system frame number (SFN) based on the master information, and

apply the identified SFN to communicate with the at least one secondary cell of the second base station,

wherein the dedicated RRC message includes information for the at least one secondary cell except for the SFN.

13. The terminal of claim 12, wherein the PSCell is configured with a physical uplink control channel (PUCCH) resource.

14. The terminal of claim 12,

wherein a master cell group (MCG) is controlled by the first base station, and

wherein a secondary cell group (SCG) is controlled by the second base station.

15. The terminal of claim 12, wherein a timing of the SFN associated with the at least one secondary cell of the second base station is different from a time of an SFN associated with at least one cell of the first base station.

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

a transceiver; and

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

determine to add at least one secondary cell including a primary secondary cell (PSCell) having a physical uplink control channel (PUCCH) resource, of the second base station, and

transmit, on the PSCell to a terminal which is connected to a first base station by a first cell, master information including a system frame number (SFN) which is applied to communicate with the at least one secondary cell of the second base station,

wherein a dedicated radio resource control (RRC) message which is transmitted from the first base station to the terminal for adding the at least one secondary cell to the terminal includes information for the at least one secondary cell except for the SFN.

17. The second base station of claim 16,

wherein a secondary cell group (SCG) is controlled by the second base station, and

wherein a master cell group (MCG) is controlled by the first base station.

18. The second base station of claim 16, wherein a timing of the SFN associated with the at least one secondary cell of the second base station is different from a time of an SFN associated with at least one cell of the first base station.

19. A first 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;

determine to add at least one secondary cell of a second base station to a terminal which is connected to a first cell of the first base station, and

transmit, to the terminal, a dedicated radio resource control (RRC) message for adding the at least one secondary cell of the second base station,

wherein the dedicated RRC message includes information for the at least one secondary cell except for a system frame number (SFN), and

wherein the SFN which is applied to the at least one secondary cell of the second base station is transmitted to the terminal on a primary secondary cell (PSCell) of the second base station.

20. The first base station of claim 19, wherein the PSCell is configured with a physical uplink control channel (PUCCH) resource.

21. The first base station of claim 19, wherein a master cell group (MCG) is controlled by the first base station, and a secondary cell group (SCG) is controlled by the second base station.

22. The first base station of claim 19, wherein a timing of the SFN associated with the at least one secondary cell of the second base station is different from a time of an SFN associated with at least one cell of the first base station.