BASE STATION AND USER TERMINAL

• US 20160366676A1
• Filed: 07/28/2016
• Published: 12/15/2016
• Est. Priority Date: 11/07/2014
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: FUJISHIRO, Masato, ADACHI, Hiroyuki, CHANG, Henry
• Granted Patent: US 10,499,377 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

A user terminal executes processes of receiving control information from a base station, the control information indicating that transmission of a gap request is allowed; transmitting a reception gap request to the base station, the reception gap request requesting reception gaps which are timings in which the user terminal halts a downlink reception to monitor device-to-device discovery signals directly transmitted from other user terminals; and receiving a gap configuration from the base station, the gap configuration indicating the reception gaps configured by the base station to the user terminal. The reception gap request includes a frequency identifier indicating a frequency for monitoring the device-to-device discovery signals; and correlated gap pattern. The gap pattern includes bit map information indicating subframes corresponding to the reception gaps; period information indicating a repeating period of the bit map information; and offset information indicating a start timing of the period.

Claims

1. A user terminal comprising:

a controller containing at least one processor and at least one memory, the controller configured to execute processes of;

receiving control information from a base station, the control information indicating that transmission of a gap request is allowed;

transmitting a reception gap request to the base station, the reception gap request requesting reception gaps which are timings in which the user terminal halts a downlink reception to monitor device-to-device discovery signals directly transmitted from other user terminals; and

receiving a gap configuration from the base station, the gap configuration indicating the reception gaps configured by the base station to the user terminal,

wherein the reception gap request includes;

a frequency identifier indicating a frequency to be used for monitoring the device-to-device discovery signals; and

a gap pattern correlated with the frequency identifier, the gap pattern including;

bit map information indicating subframes corresponding to the reception gaps;

period information indicating a predetermined period by which the bit map information is repeated; and

offset information indicating a start timing of the predetermined period.

2. The user terminal according to claim 1, wherein

the reception gaps include a merging time required to frequency switching, and

the merging time is formed by one or more subframes.

3. The user terminal according to claim 1, wherein

the control information is included in a system information block type 19 (SIB 19) broadcasted by the base station.

4. The user terminal according to claim 1, wherein

the control information is included in a dedicated radio resource control (RRC) signaling transmitted from the base station to the user terminal.

5. A base station comprising:

a controller containing at least one processor and at least one memory, the controller configured to execute processes of;

transmitting control information to a user terminal, the control information indicating that transmission of a gap request is allowed;

receiving a reception gap request from the user terminal, the reception gap request requesting reception gaps which are timings in which the user terminal halts a downlink reception to monitor device-to-device discovery signals directly transmitted from other user terminals; and

transmitting a gap configuration to the user terminal, the gap configuration indicating the reception gaps configured by the base station to the user terminal,

wherein the reception gap request includes;

a frequency identifier indicating a frequency to be used for monitoring the device-to-device discovery signals; and

a gap pattern correlated with the frequency identifier, the gap pattern including;

bit map information indicating subframes corresponding to the reception gaps;

period information indicating a predetermined period by which the bit map information is repeated; and

offset information indicating a start timing of the predetermined period.

6. The base station according to claim 5, wherein

the reception gaps include a merging time required to frequency switching, and

the merging time is formed by one or more subframes.

7. The base station according to claim 5, wherein

the control information is included in a system information block type 19 (SIB 19) broadcasted by the base station.

8. The base station according to claim 5, wherein

the control information is included in a dedicated radio resource control (RRC) signaling transmitted from the base station to the user terminal.

9. An apparatus for a user terminal, comprising:

at least one processor and at least one memory, the at least one processor configured to cause the user terminal to execute processes of;

receiving control information from a base station, the control information indicating that transmission of a gap request is allowed;

transmitting a reception gap request to the base station, the reception gap request requesting reception gaps which are timings in which the user terminal halts a downlink reception to monitor device-to-device discovery signals directly transmitted from other user terminals; and

receiving a gap configuration from the base station, the gap configuration indicating the reception gaps configured by the base station to the user terminal,

wherein the reception gap request includes;

a frequency identifier indicating a frequency to be used for monitoring the device-to-device discovery signals; and

a gap pattern correlated with the frequency identifier, the gap pattern including;

bit map information indicating subframes corresponding to the reception gaps;

period information indicating a predetermined period by which the bit map information is repeated; and

offset information indicating a start timing of the predetermined period.