Communication method using device group and device using same
Provided is a communication method using a device group, which includes a first device and a second device, in a wireless communication system. The first device establishes radio resource control (RRC) connection with a base station instead of the second device, and shares the RRC connection with the second device.
1. A method for communicating using a device group in a wireless communication system, the device group including a primary device and a secondary device, the method performed by the secondary device comprising:
establishing a wireless connection with the primary device based on a second communication protocol;
establishing a radio resource control (RRC) connection with a base station through the primary device based on a first communication protocol;
receiving a timing advance command (TAC) of the primary device from the primary device, the TAC being used by the primary device to adjust uplink time alignment; and
transmitting directly a physical uplink shared channel (PUSCH) to the base station based the TAC.
2. The method of claim 1 , further comprising:
receiving information about a downlink pathloss measured by the primary device from the primary device,
wherein a transmission power of the PUSCH is calculated based on the downlink pathloss.
3. The method of claim 1 , wherein the first communication protocol is based on long term evolution (LTE), and the second communication protocol is based on bluetooth or WiFi.
4. A device for a wireless communication system, the device comprising:
a transceiver configured to transmit and receive radio signals; and
a processor being operatively connected to the transceiver and configured to:
instruct the transceiver to establish a wireless connection with a primary device based on a second communication protocol;
instruct the transceiver to establish a radio resource control (RRC) connection with a base station through the primary device based on a first communication protocol;
instruct the transceiver to receive a timing advance command (TAC) of the primary device from the primary device, the TAC being used by the primary device to adjust uplink time alignment; and
instruct the transceiver to transmit directly a physical uplink shared channel (PUSCH) to the base station based the TAC.
5. The device of claim 4 , wherein the processor is further configured to instruct the transceiver to receive information about a downlink pathloss measured by the primary device from the primary device, and
wherein a transmission power of the PUSCH is calculated based on the downlink pathloss.
6. The device of claim 4 , wherein the first communication protocol is based on long term evolution (LTE), and the second communication protocol is based on bluetooth or WiFi.