User equipment apparatus and d2d communication method
AssigneeNtt Docomo, Inc.
InventorsShimpei Yasukawa, Hiroki Harada, Satoshi Nagata
Life of this patent
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Abstract
A user equipment apparatus for supporting D2D (user equipment-to-user equipment) communication includes a generation unit configured to generate information about at least one of a transmission resource which can be used by the user equipment apparatus to transmit a D2D signal and a reception resource which can be used by the user equipment apparatus to receive a D2D signal; and a transmission unit configured to transmit the generated information to another user equipment apparatus; wherein the transmission resource and the reception resource are orthogonal in terms of time.
Claims5
-10. (canceled)
A user equipment apparatus acting as a remote terminal for performing D2D (Device-to-Device) communication with a relay terminal, comprising:
- a quality measurement unit configured to measure quality of a reference signal transmitted from a candidate relay terminal;
- a relay terminal selection unit configured to select a relay terminal to which a D2D signal to be transmitted to a base station is transmitted based on the measured quality;
- and
- a transmission unit configured to transmit the D2D signal to the selected relay terminal.
A communication system including a relay terminal and a remote terminal for performing D2D (Device-to-Device) communication with the relay terminal, the remote terminal comprising:
- a quality measurement unit configured to measure quality of a reference signal transmitted from a candidate relay terminal;
- a relay terminal selection unit configured to select a relay terminal to which a D2D signal to be transmitted to a base station is transmitted based on the measured quality;
- and
- a transmission unit configured to transmit the D2D signal to the selected relay terminal;
- and
- the relay terminal comprising:
- a transmission unit configured to report to the base station that the relay terminal acts as a relay terminal and transmits to the base station the D2D signal received from the remote terminal.
A D2D (Device-to-Device) communication method in a user equipment apparatus acting as a remote terminal for performing D2D communication with a relay terminal, comprising the steps of:
- measuring quality of a reference signal transmitted from a candidate relay terminal;
- selecting a relay terminal to which a D2D signal to be transmitted to a base station is transmitted based on the measured quality;
- and
- transmitting the D2D signal to the selected relay terminal.
Dependencies are inferred from the claim text.