USER APPARATUS, BASE STATION, RADIO RESOURCE SELECTION METHOD, AND RADIO RESOURCE NOTIFICATION METHOD

• US 20160174056A1
• Filed: 05/15/2014
• Published: 06/16/2016
• Est. Priority Date: 05/20/2013
• Status: Abandoned Application

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Nagata, Satoshi, Harada, Hiroki, Takeda, Kazuki
• Application Number:
  US14/892,281
• Publication Number:
  US 20160174056A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A user apparatus configured to select a discovery resource from a predetermined radio resource, and to transmit a discovery signal using the discovery resource, including: means that receives, from a plurality of base stations, radio resource information indicating a radio resource by which a discovery signal can be transmitted; means that detects a common region of radio resources by which a discovery signal can be transmitted between the plurality of base stations based on a plurality of pieces of radio resource information received from the plurality of base stations; and means that selects a discovery resource from a radio resource of the common region, and transmits a discovery signal by using the discovery resource.

Claims

1. A user apparatus configured to select a discovery resource from a predetermined radio resource, and to transmit a discovery signal using the discovery resource, comprising:

a unit configured to receives, from a plurality of base stations, radio resource information indicating a radio resource by which a discovery signal can be transmitted;

a unit configured to detects a common region of radio resources by which a discovery signal can be transmitted between the plurality of base stations based on a plurality of pieces of radio resource information received from the plurality of base stations; and

a unit configured to selects a discovery resource from a radio resource of the common region, and transmits a discovery signal by using the discovery resource.

2. A user apparatus configured to detect a discovery signal from a predetermined radio resource, comprising:

a unit configured to receives, from a plurality of base stations, radio resource information indicating a radio resource from which a discovery signal is to be detected;

a unit configured to detects a common region or a logical sum region of radio resources from which a discovery signal is to be detected between the plurality of base stations based on a plurality of pieces of radio resource information received from the plurality of base stations; and

a unit configured to detects a discovery signal from a radio resource of the common region or the logical sum region.

3. A base station configured to communicate with a user apparatus that selects a discovery resource from a predetermined radio resource, and transmits a discovery signal using the discovery resource, comprising:

a unit configured to determines a radio resource by which a discovery signal can be transmitted in a cell formed by the base station;

a unit configured to receives, from another base station, information indicating a radio resource by which a discovery signal can be transmitted in a cell formed by the other base station;

a unit configured to detects a common region between the radio resource by which a discovery signal can be transmitted in the cell formed by the base station and the radio resource by which a discovery signal can be transmitted in the cell formed by the other base station; and

a unit configured to transmits information indicating a radio resource of the common region to the user apparatus.

4. The base station as claimed in claim 3, wherein, as the radio resource by which a discovery signal can be transmitted in the cell formed by the base station, the base station selects a subframe for MBSFN in the cell.

5. A base station configured to communicate with a user apparatus that detects a discovery signal from a predetermined radio resource, comprising:

a unit configured to determines a radio resource from which a discovery signal is to be detected in a cell formed by the base station;

a unit configured to receives, from another base station, information indicating a radio resource from which a discovery signal is to be detected in a cell formed by the other base station;

a unit configured to detects a common region or a logical sum region between the radio resource from which a discovery signal is to be detected in the cell formed by the base station and the radio resource from which a discovery signal is to be detected in the cell formed by the other base station; and

a unit configured to transmits information indicating a radio resource of the common region or the logical sum region to the user apparatus.

6. The base station as claimed in claim 5, wherein, as the radio resource from which a discovery signal is to be detected in the cell formed by the base station, the base station selects a subframe for MBSFN in the cell.

7. A radio resource selection method executed by a user apparatus configured to select a discovery resource from a predetermined radio resource, and to transmit a discovery signal using the discovery resource, comprising:

a step of receiving, from a plurality of base stations, radio resource information indicating a radio resource by which a discovery signal can be transmitted;

a step of detecting a common region of radio resources by which a discovery signal can be transmitted between the plurality of base stations based on a plurality of pieces of radio resource information received from the plurality of base stations; and

a step of selecting a discovery resource from a radio resource of the common region, and transmitting a discovery signal by using the discovery resource.

8. A radio resource selection method executed by a user apparatus configured to detect a discovery signal from a predetermined radio resource, comprising:

a step of receiving, from a plurality of base stations, radio resource information indicating a radio resource from which a discovery signal is to be detected;

a step of detecting a common region or a logical sum region of radio resources from which a discovery signal is to be detected between the plurality of base stations based on a plurality of pieces of radio resource information received from the plurality of base stations; and

a step of detecting a discovery signal from a radio resource of the common region or the logical sum region.

9. A radio resource notification method executed by a base station configured to communicate with a user apparatus that selects a discovery resource from a predetermined radio resource, and transmits a discovery signal using the discovery resource, comprising:

a step of determining a radio resource by which a discovery signal can be transmitted in a cell formed by the base station;

a step of receiving, from another base station, information indicating a radio resource by which a discovery signal can be transmitted in a cell formed by the other base station;

a step of detecting a common region between the radio resource by which a discovery signal can be transmitted in the cell formed by the base station and the radio resource by which a discovery signal can be transmitted in the cell formed by the other base station; and

a step of transmitting information indicating a radio resource of the common region to the user apparatus.

10. A radio resource notification method executed by a base station configured to communicate with a user apparatus that detects a discovery signal from a predetermined radio resource, comprising:

a step of determining a radio resource from which a discovery signal is to be detected in a cell formed by the base station;

a step of receiving, from another base station, information indicating a radio resource from which a discovery signal is to be detected in a cell formed by the other base station;

a step of detecting a common region or a logical sum region between the radio resource from which a discovery signal is to be detected in the cell formed by the base station and the radio resource from which a discovery signal is to be detected in the cell formed by the other base station; and

a step of transmitting information indicating a radio resource of the common region or the logical sum region to the user apparatus.