Method and apparatus for using resources for device-to-device operation in wireless communication system
AssigneeLG Electronics Inc.
InventorsSunghoon Jung, Youngdae Lee
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Abstract
A method and apparatus for using resources for a device-to-device (D2D) operation in a wireless communication system is provided. A user equipment (UE) receives D2D resources used for transmission of D2D signals in radio resource control (RRC) idle mode, and transmits the D2D signals by using the D2D resources in the RRC idle mode. The D2D resources may be used in the RRC idle mode only, or may be used after entering the RRC connected mode. Alternatively, the UE receives D2D resources used for transmission of D2D signals in RRC connected mode, and transmits the D2D signals by using the D2D resources in the RRC idle mode.
Claims8
A method for using, by a user equipment (UE), resources for a device-to-device (D2D) operation in a wireless communication system, the method comprising:
- entering a radio resource control (RRC) idle mode;
- while in the RRC idle mode:
- receiving an autonomous transmission resource pool for D2D discovery signals via system information from a network, and
- transmitting D2D discovery signals according to the autonomous transmission resource pool;
- and
- entering an RRC connected mode from the RRC idle mode,
- wherein the autonomous transmission resource pool is used only in the RRC idle mode and is invalid after entering the RRC connected mode, and
- wherein the system information corresponds to a system information block (SIB) defined for the D2D discovery signals.
A user equipment (UE) in a wireless communication system, the UE comprising:
- a radio frequency (RF) unit;
- and
- a processor, coupled to the RF unit, that:
- enters a radio resource control (RRC) idle mode;
- while in the RRC idle mode:
- controls the RF unit to receive an autonomous transmission resource pool for D2D discovery signals via system information from a network, and
- controls the RF unit to transmit D2D discovery signals according to the autonomous transmission resource pool;
- and
- enters an RRC connected mode from the RRC idle mode,
- wherein the autonomous transmission resource pool is used only in the RRC idle mode and is invalid after entering the RRC connected mode, and
- wherein the system information corresponds to a system information block (SIB) defined for the D2D discovery signals.
Dependencies are inferred from the claim text.