Communication device and wireless communication method

1 . A communication device comprising:

a first antenna and a second antenna;

a first front-end module configured to provide a transmission path associated with a first network or a first reception path associated with the first network;

a diplexer electrically configured to provide a second reception path associated with the first network and a first reception path associated with a second network; and

processing circuitry configured to,

receive a message from the first network, the message including a first timing at which a first sounding reference signal (SRS) associated with the first network is to be transmitted through the first antenna and a second timing at which a second SRS associated with the first network is to be transmitted through the second antenna,

electrically connect the first front-end module to the first antenna in a first state,

electrically connect the diplexer to the second antenna in the first state,

electrically connect the first front-end module to the second antenna in a second state, and

electrically disconnect the diplexer from the second antenna in the second state.

2 . The communication device of claim 1 , wherein the processing circuitry is configured to determine whether to enter the first state based on a priority of a first signal to be received by the communication device at the second timing.

3 . The communication device of claim 2 , wherein the processing circuitry is configured to:

operate a first protocol stack for accessing the first network and a second protocol stack for accessing the second network, the first protocol stack and the second protocol stack sharing an upper layer.

4 . The communication device of claim 3 , wherein the processing circuitry is configured to:

compare signal communication timings of the first network and the second network by operating the upper layer;

determine whether the second timing overlaps a third timing when the first signal is to be received by the communication device; and

determine whether the priority of the first signal to be received is higher than a priority of the second SRS in response to determining that the second timing.

5 . The communication device of claim 1 , further comprising:

a first switch and a second switch,

wherein the processing circuitry is configured to,

control the first switch to electrically connect the first front-end module and the first antenna in the first state,

control the first switch to electrically connect the first front-end module and the second switch in the second state,

control the second switch to electrically connect the diplexer and the second antenna in the first state, and

control the second switch to electrically connect the first switch and the second antenna in the second state.

6 . The communication device of claim 5 , further comprising:

a third antenna; and

a second front-end module configured to provide a transmission path associated with the second network or a second reception path associated with the second network.

7 . The communication device of claim 6 , wherein the communication device further comprises:

a third switch,

wherein the processing circuitry is configured to,

control the third switch to electrically connect the second front-end module and the third antenna in the first state and the second state,

control the first switch to electrically connect the first front-end module and the first antenna in a third state,

control the second switch to electrically connect the third switch and the second antenna in the third state, and

control the third switch to electrically connect the second switch and the second front-end module in the third state.

8 . The communication device of claim 7 , wherein the first network and the second network each communicates with the communication device using a time division duplexing (TDD).

9 . The communication device of claim 1 , further comprising:

a first subscriber identity module (SIM) including information for accessing the first network; and

a second SIM including information for accessing the second network.

10 . The communication device of claim 1 , wherein the processing circuitry is configured to communicate a message to or from a base station of the second network using the first network through multi-connectivity.

11 . The communication device of claim 1 , wherein the communication device communicates with the first network and the second network according to different radio access technologies (RATs).

12 . A communication device comprising:

a dedicated antenna configured to transmit or receive a signal associated with a first network;

a shared antenna configured to receive the signal associated with the first network and a signal associated with a second network; and

processing circuitry configured to,

switch between a first transmission path for transmitting a first surrounding reference signal (SRS) associated with the first network and a second transmission path for transmitting a second SRS associated with the first network, the first transmission path transmitting the first SRS through the dedicated antenna, and the second transmission path transmitting the second SRS through the shared antenna,

receive a message from the first network, the message including a first timing at which the first SRS is to be transmitted through the first transmission path and a second timing at which the second SRS is to be transmitted through the second transmission path, and

block the second transmission path when a priority of the signal associated with the second network is higher than a priority of the second SRS, the signal associated with the second network to be received at the second timing.

13 . A wireless communication method for contemporaneous connection to a first network and a second network, comprising:

receiving a message from the first network, the message including a first timing at which a first surrounding reference signal (SRS) is to be transmitted through a first antenna and a second timing at which a second SRS associated with the first network is to be transmitted through a shared antenna, the shared antenna being configured to receive a first signal associated with the first network and a second signal associated with the second network;

determining whether the second timing overlaps a third timing when the second signal is to be received;

determining whether a priority of the second signal is higher than a priority of the second SRS in response to determining that the second timing overlaps the third timing; and

blocking the second SRS from being transmitted at the second timing in response to determining that the priority of the second signal is higher than the priority of the second SRS.

14 . The wireless communication method of claim 13 , further comprising:

setting the second timing based on a radio resource control (RRC) reconfiguration message received from a base station.

15 . The wireless communication method of claim 14 , wherein the determining whether the second timing overlaps the third timing comprises:

determining a timing difference between a first frame of the first network and a second frame of the second network using a common clock;

determining whether the second network is in a downlink transmission period at the second timing based on resource allocation information of the second frame and the timing difference; and

determining that the second timing overlaps the third timing in response to determining that the second network is in the downlink transmission period at the second timing.

16 . The wireless communication method of claim 13 , further comprising:

transmitting the second SRS through the shared antenna at the second timing in response to determining that the priority of the second signal is lower than the priority of the second SRS.

17 . The wireless communication method of claim 16 , further comprising:

transmitting a retransmission request for the second signal to a base station based on the transmitting the second SRS.

18 . The wireless communication method of claim 13 , wherein the determining whether the priority of the second signal is higher than the priority of the second SRS comprises:

determining that the priority of the second signal is higher than the priority of the second SRS based on the second signal being a paging signal, a synchronization signal, or a reference signal for determining a channel decoding method.

19 . The wireless communication method of claim 18 , wherein the determining whether the priority of the second signal is higher than the priority of the second SRS further comprises:

determining that the priority of the second signal is lower than the priority of the second SRS based on the second signal being a data signal.

20 . The wireless communication method of claim 13 , further comprising:

determining whether the second timing overlaps a fourth timing when a third SRS associated with the second network is to be transmitted through the shared antenna; and

alternately transmitting the second SRS and the third SRS through the shared antenna in response to determining that the second timing overlaps the fourth timing.