Method for transmitting, by terminal, synchronization signal for device-to-device (D2D) operation in wireless communication system, and terminal using method
AssigneeLG Electronics Inc.
InventorsSunghoon Jung, Hanbyul Seo
Life of this patent
Estimating the term…
Abstract
Provided are a method for transmitting, by a terminal, a synchronization signal for a device-to-device (D2D) operation in a wireless communication system, and a terminal using the method. The method comprises the steps of: transmitting a synchronization signal for a D2D operation (D2D synchronization signal: D2DSS) in an RRC (radio resource control) idle state; entering an RRC connected state; and transmitting the D2DSS even after entering the RRC connected state if a certain condition is met.
Claims14
A method for transmitting a synchronization signal for a device-to-device (D2D) operation in a wireless communication system, the method performed by a user equipment (UE) and comprising:
- transmitting a D2D synchronization signal (D2DSS) for the D2D operation in a radio resource control (RRC) idle state;
- entering an RRC connected state;
- transmitting UE ProSe information to a network, the UE ProSe information including transmission-in-idle state information informing that the UE has transmitted the D2DSS in the RRC idle state;
- and
- re-transmitting the D2DSS after entering the RRC connected state if a certain condition is met.
A user equipment (UE) for transmitting a synchronization signal for a device-to-device (D2D) operation in a wireless communication system, the UE comprising:
- a radio frequency (RF) unit configured to transmit and receive a radio signal;
- and
- a processor operatively coupled to the RF unit and configured to:
- control the RF unit to transmit a D2D synchronization signal (D2DSS) for the D2D operation in a radio resource control (RRC) idle state;
- enter an RRC connected state;
- control the RF unit to transmit UE ProSe information to a network, the UE ProSe information including transmission-in-idle state information indicating that the UE has transmitted the D2DSS in the RRC idle state;
- and
- control the RF unit to re-transmit the D2DSS after entering the RRC connected state if a certain condition is met.
Dependencies are inferred from the claim text.