Device and method for multi-subscriber identity module wireless communication

1 . An operating method of a user equipment supporting dual subscriber identity module (SIM) dual active (DSDA), the operating method comprising:

performing a first communication with a first base station through a first network via a plurality of radio frequency (RF) transmission paths allocated to a first SIM, the plurality of RF transmission paths being included in a set of RF transmission paths of the user equipment, the plurality of RF transmission paths including a first RF transmission path and a second RF transmission path, and each respective RF transmission path among the set of RF transmission paths including hardware of the user equipment;

determining whether a first number of RF transmission paths included in the set of RF transmission paths is equal to a second number of RF transmission paths included in the plurality of RF transmission paths in response to a resource allocation request from a second SIM, the resource allocation request corresponding to a second communication with a second base station through a second network;

first allocating the first RF transmission path to each of the first SIM and the second SIM based on a time division multiplexing (TDM) scheme in response to determining the first number of RF transmission paths is equal to the second number of RF transmission paths; and

second allocating the second RF transmission path to the first SIM contemporaneous with the first allocating, wherein

the first communication is performed contemporaneously through both of the first RF transmission path and the second RF transmission path in response to the first allocating and the second allocating, and

the second communication is performed through the first RF transmission path in response to the first allocating,

wherein configuring of a capability of the user equipment for the first communication comprises:

configuring a sounding reference signal (SRS) transmission scheme of the first communication to be a one-transmission and multi-reception antenna scheme.

2 . The operating method of claim 1 , wherein the first number of RF transmission paths is less than a sum of a maximum number of RF transmission paths allocatable to the first SIM and a maximum number of RF transmission paths allocatable to the second SIM.

3 . The operating method of claim 1 , wherein

the first network comprises a 4 th generation (4G) network or a stand-alone type 5 th generation (5G) network; and

the second network comprises the 4G network or the stand-alone type 5G network.

4 . The operating method of claim 1 , wherein

the first communication comprises a communication based on an Internet packet data network (PDN); and

the second communication comprises a voice over long term evolution (VoLTE) call or a voice over new radio (VoNR) call based on an Internet protocol multimedia subsystem (IMS) PDN.

5 . The operating method of claim 1 , further comprising:

changing a configuration of capability of the user equipment, the first allocating being based on the configuration of capability;

generating a user equipment (UE) capability message based on the configuration of capability; and

transmitting the UE capability message to the first base station and the second base station.

6 . The operating method of claim 5 , wherein the UE capability message comprises at least one of sounding reference signal (SRS) supporting scheme information or uplink rank information.

7 . The operating method of claim 1 , wherein the first allocating comprises:

selecting the first RF transmission path from among the plurality of RF transmission paths; and

alternately allocating the first RF transmission path to the first SIM and the second SIM according to a communication period of the second network.

8 . The operating method of claim 7 , wherein the first allocating is performed based on an availability of each of the plurality of RF transmission paths.

9 . The operating method of claim 1 , wherein

the first allocating includes allocating at least one of the plurality of RF transmission paths to each of the first SIM and the second SIM, the at least one of the plurality of RF transmission paths including the first RF transmission path; and

the operating method further comprises,

selecting the at least one of the plurality of RF transmission paths from among the plurality of RF transmission paths,

alternately allocating the at least one of the plurality of RF transmission paths to the first SIM and the second SIM based on a communication period of the second network, and

determining a third number of RF transmission paths included in the at least one of the plurality of RF transmission paths based on a channel state of the first network.

10 . The operating method of claim 1 , wherein

the first allocating includes allocating at least one of the plurality of RF transmission paths to each of the first SIM and the second SIM, the at least one of the plurality of RF transmission paths including the first RF transmission path; and

the operating method further includes at least one of,

alternately allocating the at least one of the plurality of RF transmission paths to the first SIM and the second SIM based on a communication period of the second network, or

determining a third number of RF transmission paths included in the at least one of the plurality of RF transmission paths based on a channel state of the first network.

11 . A user equipment supporting dual subscriber identity module (SIM) dual active (DSDA), the user equipment comprising:

a first SIM and a second SIM;

a transmitter configured to form a set of radio frequency (RF) transmission paths, each respective RF transmission path among the set of RF transmission paths including hardware of the user equipment; and

processing circuitry configured to,

cause the transmitter to perform a first communication with a first base station through a first network via a plurality of RF transmission paths allocated to the first SIM, the plurality of RF transmission paths being included in the set of RF transmission paths, and the plurality of RF transmission paths including a first RF transmission path and a second RF transmission path,

determine whether a first number of RF transmission paths included in the set of RF transmission paths is equal to a second number of RF transmission paths included in the plurality of RF transmission paths in response to a resource allocation request from the second SIM, the resource allocation request corresponding to a second communication with a second base station through a second network,

first allocate the first RF transmission path to each of the first SIM and the second SIM based on a time division multiplexing (TDM) scheme in response to determining the first number of RF transmission paths is equal to the second number of RF transmission paths,

second allocate the second RF transmission path to the first SIM contemporaneous with the first allocation,

cause the transmitter to perform the first communication contemporaneously through both of the first RF transmission path and the second RF transmission path based on the first allocation and the second allocation, and

cause the transmitter to perform the second communication through the first RF transmission path based on the first allocation,

wherein configuring of a capability of the user equipment for the first communication comprises:

configuring a sounding reference signal (SRS) transmission scheme of the first communication to be a one-transmission and multi-reception antenna scheme.

12 . The user equipment of claim 11 , wherein the first number of RF transmission paths is less than a sum of a maximum number of RF transmission paths allocatable to the first SIM and a maximum number of RF transmission paths allocatable to the second SIM.

13 . The user equipment of claim 11 , wherein

the first network comprises a 4 th generation (4G) network or a stand-alone type 5 th generation (5G) network; and

the second network comprises the 4G network or the stand-alone type 5G network.

14 . The user equipment of claim 11 , wherein

the first communication comprises a communication based on an Internet packet data network (PDN); and

the second communication comprises a voice over long term evolution (VoLTE) call or a voice over new radio (VoNR) call based on an Internet protocol multimedia subsystem (IMS) PDN.

15 . The user equipment of claim 11 , wherein the processing circuitry is configured to:

change a configuration of capability of the user equipment, the first allocation including allocating at least one of the plurality of RF transmission paths to each of the first SIM and the second SIM being based on the configuration of capability;

generate a user equipment (UE) capability message based on the configuration of capability; and

transmit the UE capability message to the first base station and the second base station.

16 . The user equipment of claim 15 , wherein the UE capability message comprises at least one of sounding reference signal (SRS) supporting scheme information or uplink rank information.

17 . The user equipment of claim 11 , wherein the processing circuitry is configured to first allocate the first RF transmission path to each of the first SIM and the second SIM by:

selecting the first RF transmission path from among the plurality of RF transmission paths; and

alternately allocating the first RF transmission path to the first SIM and the second SIM according to a communication period of the second network.

18 . The user equipment of claim 17 , wherein the processing circuitry is configured to first allocate the first RF transmission path to each of the first SIM and the second SIM an availability of each of the plurality of RF transmission paths.

19 . The user equipment of claim 11 , wherein the processing circuitry is configured to:

first allocate at least one of the plurality of RF transmission paths to each of the first SIM and the second SIM, the at least one of the plurality of RF transmission paths including the first RF transmission path,

select the at least one of the plurality of RF transmission paths from among the plurality of RF transmission paths,

alternately allocate the at least one of the plurality of RF transmission paths to the first SIM and the second SIM based on a communication period of the second network, and

determine a third number of RF transmission paths included in the at least one of the plurality of RF transmission paths based on a channel state of the first network.

20 . The user equipment of claim 11 , wherein

the first allocation includes allocating at least one of the plurality of RF transmission paths to each of the first SIM and the second SIM, the at least one of the plurality of RF transmission paths including the first RF transmission path; and

the processing circuitry is configured to,

alternately allocate the at least one of the plurality of RF transmission paths to the first SIM and the second SIM based on a communication period of the second network, or

determine a third number of RF transmission paths included in the at least one of the plurality of RF transmission paths based on a channel state of the first network.