Method and device for transmitting and receiving data in mobile communication system

• US 9,661,526 B2
• Filed: 05/21/2013
• Issued: 05/23/2017
• Est. Priority Date: 05/21/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Sang Bum, Kim, Soeng Hun, Van Lieshout, Gert Jan, Jeong, Kyeong In
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): Boakye, Alexander O
• Application Number:
  US14/403,147
• Publication Number:
  US 20150181461A1
• Time in Patent Office: 1,463 Days
• Field of Search: 370474, 370229, 370321, 370337, 370347, 370319, 370231, 370280, 370329, 370328, 370349, 370236
• CPC Class Codes: H04W 28/0289 Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present specification relates to a communication method and a communication device, and a random access method of a user equipment (UE), according to one embodiment of the present specification, comprises the steps of: sensing a random access trigger in a connected state; determining the type of the random access trigger when the random access trigger is sensed; and performing congestion control if the type of the random access trigger is a preset type.

Claims

1. A method by a user equipment (UE), the method comprising:

receiving an activation command for a secondary cell (SCell) from a base station in a subframe n;

performing a radio frequency (RF) bandwidth reconfiguration based on the activation command for the SCell; and

suspending data communication on a primary cell (PCell) for a predetermined number of subframes based on the activation command for the SCell,

wherein the suspending of the data communication on the PCell begins in a subframe n+5.

2. The method of claim 1, further comprising:

transmitting a hybrid automatic repeat request (HARQ) feedback for the activation command.

3. The method of claim 1, if the SCell is activated based on the activation command for the SCell, further comprising at least one of:

transmitting a sounding reference signal (SRS) on the SCell;

or

monitoring a physical downlink control channel (PDCCH) of the SCell.

4. The method of claim 1, after the activation command for the SCell is received, further comprising at least one of:

starting a timer of a deactivation for the SCell;

or

transmitting a channel quality indicator (CQI) for the SCell.

5. The method of claim 1, wherein the suspending of the data communication on the PCell is caused if the PCell and the SCell belong to a same frequency band.

6. The method of claim 1, wherein the RF bandwidth reconfiguration is performed if the SCell is activated based on the activation command for the SCell.

7. The method of claim 6, if the SCell was previously activated before the activation command for the SCell is received, further comprising at least one of:

starting a timer of a SCell deactivation for the SCell;

transmitting a channel quality indicator (CQI) for the SCell;

monitoring a physical downlink control channel (PDCCH) of the SCell; and

triggering a power headroom (PHR) report.

8. A user equipment (UE), the UE comprising:

a transceiver configured to transmit and receive signals; and

a controller configured to;

receive an activation command for a secondary cell (SCell) from a base station in a subframe n;

perform a radio frequency (RF) bandwidth reconfiguration based on the activation command for the SCell; and

suspend data communication on a primary cell (PCell) for a predetermined number of subframes based on the activation command for the SCell,

wherein the suspending of the data communication on the PCell begins in a subframe n+5.

9. The UE of claim 8, wherein the controller is further configured to:

transmit a hybrid automatic repeat request (HARQ) feedback for the activation command.

10. The UE of claim 8, wherein the controller is further configured to:

transmit a sounding reference signal (SRS) on the SCell and monitor a physical downlink control channel (PDCCH) of the SCell, if the SCell is activated based on the activation command for the SCell.

11. The UE of claim 8, wherein the controller is further configured to:

start a timer of a deactivation for the SCell and transmit a channel quality indicator (CQI) for the SCell, after the activation command for the SCell is received.

12. The UE of claim 8, wherein the suspending of the data communication on the PCell is caused if the PCell and the SCell belong to a same frequency band.

13. The UE of claim 8, wherein the RF bandwidth reconfiguration is performed if the SCell is activated based on the activation command for the SCell.

14. The UE of claim 13, wherein the controller is further configured to:

start a timer of a SCell deactivation for the SCell;

transmit a channel quality indicator (CQI) for the SCell;

monitor a physical downlink control channel (PDCCH) of the SCell; and

trigger a power headroom (PHR) report, if the SCell was previously activated before the activation command for the SCell is received.