METHOD AND MTC DEVICE FOR RECEIVING DOWNLINK CHANNEL

• US 20170272322A1
• Filed: 09/24/2015
• Published: 09/21/2017
• Est. Priority Date: 09/25/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: YOU, Hyangsun, YI, Yunjung, AHN, Joonkui, YANG, Suckchel, YUM, Kunil
• Granted Patent: US 10,382,270 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 41/0853 by actively collecting configuration information or by backing up configuration information
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• 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

Abstract

Provided is a method for receiving a downlink control channel in a machine type communication (MTC) device. A method for receiving a downlink control channel can comprise the steps of: receiving first configuration information about an MTC device-operable subband among system bands of a cell; receiving second configuration information, about a subframe, for monitoring a downlink control channel in a cell-specific search space (CSS); and switching from a subband with respect to the first configuration information to a pre-configured cell-common subband and then receiving, in the cell-common subband in a subframe with respect to the second configuration information, a downlink control channel in the CSS and another channel.

Claims

1. A method for receiving a downlink control channel, the method performed by a machine type communication (MTC) apparatus and comprising:

receiving a first configuration information for a sub-band in which the MTC apparatus is operable among a system band of a cell;

receiving a second configuration information for a subframe for monitoring a downlink control channel in a cell-specific search space (CSS); and

after switching from the sub-band according to the first configuration information to a preconfigured cell-common sub-band, receiving the downlink control channel in the CSS and another channel in the cell-common sub-band according to the second configuration information.

2. The method of claim 1, wherein the downlink control channel in the CSS is an Enhanced Physical Downlink Control Channel (EPDCCH).

3. The method of claim 1, further comprising:

receiving a downlink data channel in the sub-band according to the first configuration information.

4. The method of claim 1, wherein one or more of the first configuration information and the second configuration information is received through a high layer signaling.

5. The method of claim 1, when switching from a sub-band according to the first configuration information to a preconfigured cell-common sub-band on a subframe according to the second configuration information,

wherein a Radio Frequency (RF) unit is re-tuned, not receiving a signal on a part of the front OFDM symbol of the subframe.

6. A method for receiving a downlink channel, the method performed by a machine type communication (MTC) apparatus configured to operate only in a part of a sub-band among a system band of a cell and the method comprising:

after hopping from a first sub-band among a system band of the cell in subframe k to a second sub-band, receiving a bundle of downlink channels repeated n times from subframe k to subframe k+n; and

counting a number of the downlink channel being repeated in the received bundle,

when the downlink channel is not received in subframe k, wherein a number of subframe k not receiving the downlink channel is excluded from the counted number for hopping from the first sub-band to the second sub-band in subframe k.

7. The method of claim 6, when the number of subframe k not receiving the downlink channel is 1,

wherein the counted number is n−

1.

8. The method of claim 6, further comprising:

receiving a bundle of subframe channels repeated n times from subframe k−

n to subframe k; and

counting a number of the downlink channel being repeated in the received bundle from subframe k−

n to subframe k,

wherein the counted number is n.

9. The method of claim 6, further comprising:

receiving a first configuration information for a first sub-band and a second sub-band in which an MTC apparatus is operable in a system band of the cell; and

receiving a second configuration information for a subframe for switching between the first sub-band and the second sub-band.

10. The method of claim 9, wherein one or more of the first configuration information and the second configuration information is received through a high layer signaling.

11. A machine type communication (MTC) apparatus for receiving a downlink control channel, comprising:

a RF unit; and

a processor for controlling the RF unit, wherein the processor is configured to perform;

receiving a first configuration information for a sub-band in which the MTC apparatus is operable among a system band of a cell;

receiving a second configuration information for a subframe for monitoring a downlink control channel in a cell-specific search space (CSS); and

after switching from the sub-band according to the first configuration information to a preconfigured cell-common sub-band, receiving the downlink control channel in the CSS and another channel in the cell-common sub-band according to the second configuration information.

12. The MTC apparatus of claim 11, when switching from a sub-band according to the first configuration information to a preconfigured cell-common sub-band on a subframe according to the second configuration information,

wherein the processor performs re-tuning the Radio Frequency (RF) unit, not receiving a signal on a part of the front OFDM symbol of the subframe.

13. A machine type communication (MTC) apparatus for receiving a downlink control channel only in a part of a sub-band among a system band of a cell, comprising:

a RF unit; and

a processor for controlling the RF unit, wherein the processor is configured to perform;

after hopping from a first sub-band among a system band of the cell in subframe k to a second sub-band, receiving a bundle of downlink channels repeated n times from subframe k to subframe k+n; and

counting a number of the downlink channel being repeated in the received bundle,

wherein, when the downlink channel is not received in subframe k, a number of subframe k not receiving the downlink channel is excluded from the counted number for hopping from the first sub-band to the second sub-band in subframe k.