Patent Publication Number: US-2023156458-A1

Title: Method for information transmission, communication device, and storage medium

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is the national phase of International Application No. PCT/CN2020/083053, filed on Apr. 2, 2020, the content of which is hereby incorporated by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The disclosure relates to the field of wireless communication technologies, and more particularly, to a method for information transmission, a communication device and a storage medium. 
     BACKGROUND 
     There are an increasing number of multi-SIM (multiple subscriber identification modules) terminals such as multi-SIM mobile phones on the market as wireless communication technologies continue to develop. Typical scenarios of multi-SIM mobile phones include the following. A business user can have a private SIM and a business SIM and the two SIMs are placed on the same phone. An ordinary user can have multiple private SIMs and can choose a SIM from the multiple SIMs to use according to a communication service. 
     For a multi-SIM terminal, a network currently considers different SIMs as different terminals, and each SIM communicates with the network independently. There is no interconnection communication relationship among multiple SIMs. 
     SUMMARY 
     According to a first aspect of embodiments of the disclosure, a method for information transmission is provided, which is applicable to a terminal and includes sending indication information that the terminal has multiple SIMs to a base station in a process of establishing a radio resource control (RRC) connection. 
     According to a second aspect of embodiments of the disclosure, a method for information transmission is provided, which is applicable to a base station and includes: receiving indication information in a process of establishing a RRC connection by a terminal, in which the indication information is sent by the terminal in response to having at least two SIMs; and determining that the terminal has the at least two SIMs according to the indication information. 
     According to a third aspect of embodiments of the disclosure, a communication device is provided, which includes a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being executed by the processor. The processor is configured to execute the executable program to perform the method as described in the first aspect or the second aspect. 
     According to a fourth aspect of embodiments of the disclosure, a storage medium is provided, which has stored therein an executable program that executed by a processor, causes the processor to perform the method as described in the first aspect or the second aspect. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure, as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and, together with the description, serve to explain the principles of the disclosure. 
         FIG.  1    is a schematic structural diagram of a wireless communication system according to some embodiments. 
         FIG.  2    is a flowchart of a method for information transmission according to some embodiments. 
         FIG.  3    is a flowchart of another method for information transmission according to some embodiments. 
         FIG.  4    is a flowchart of yet another method for information transmission according to some embodiments. 
         FIG.  5    is a block diagram of an apparatus for information transmission according to some embodiments. 
         FIG.  6    is a block diagram of another apparatus for information transmission according to some embodiments. 
         FIG.  7    is a block diagram of a device for information transmission according to some embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to some embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise represented. The implementations set forth in the following description of some embodiments do not represent all implementations consistent with the disclosure. Instead, they are merely examples of apparatuses and methods consistent with aspects related to the disclosure as recited in the appended claims. 
     The terms used in embodiments of the disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the disclosure. The singular forms of “a”, “said” and “the” used in the disclosure and appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term “and/or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. 
     It should be understood that although the terms first, second, and third may be used in this disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word “if” as used herein can be interpreted as “when”, “while” or “in response to determining”. 
     Referring to  FIG.  1   ,  FIG.  1    illustrates a schematic diagram of a wireless communication system according to some embodiments of the disclosure. As illustrated in  FIG.  1   , the wireless communication system is a communication system based on cellular mobile communication technologies. The wireless communication system includes terminals  11  and base stations  12 . 
     The terminal  11  may be a device that provides voice and/or data connectivity to a user. The terminal  11  may communicate with one or more core networks via a radio access network (RAN). The terminal  11  may be an Internet of Things (IoT) UE such as a sensor device, a mobile phone (or “cellular” phone) and a computer with the IoT UE. The terminal  11  may be a fixed, portable, pocket, hand-held, computer built-in or a vehicle-mounted device, for example, a station (STA), a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a UE. Alternatively, the UE  11  terminal  11  may also be a device of an unmanned aerial vehicle. Alternatively, the terminal  11  may also be a vehicle-mounted device, for example, an engine control unit (ECU) with a wireless communication function or a wireless communication device externally connected to the ECU. Alternatively, the terminal  11  may also be a roadside device, for example, a streetlight, a signal light, or other roadside devices with a wireless communication function. 
     The base station  12  may be a network-side device in the wireless communication system. The wireless communication system may be a 4 th  generation (4G) mobile communication system, also known as a long term evolution (LTE) system. Or, the wireless communication system may also be a 5 th  generation (5G) mobile communication system, also known as a new radio (NR) system or 5G NR system. Alternatively, the wireless communication system may also be a next-generation system of the 5G system. The access network in the 5G system may be called new generation-radio access network (NG-RAN), or machine-type communication (MTC) system. 
     The base station  12  may be an evolved base station (eNB) employed in the 4G system. Alternatively, the base station  12  may also be a base station (gNB) that adopts a centralized distributed architecture in the 5G system. When the base station  12  adopts the centralized distributed architecture, it usually includes a central unit (CU) and at least two distributed units (DUs). The central unit is provided with protocol stacks of a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a media access control (MAC) layer. A protocol stack of a physical (PHY) layer is set in the DU. The specific implementation manner of the base station  12  is not limited in embodiments of the disclosure. 
     A wireless connection can be established between the base station  12  and the terminal  11  through a radio air interface. In different embodiments, the radio air interface may be a radio air interface based on the 4G mobile communication network technology standard, or the radio air interface may be a radio air interface based on the 5G mobile communication network technology standard, for example, the radio air interface is a NR, or, the radio air interface may also be a radio air interface based on a next generation of 5G mobile communication network technology standard 
     In some embodiments, an end to end (E2E) connection may also be established between the terminals  11 , for example, scenes of vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication and vehicle to pedestrian (V2P) communication in vehicle to everything (V2X) communication. 
     In some embodiments, the above wireless communication system may further include a network management device  13 . 
     Base stations  12  are connected to the network management device  13  respectively. The network management device  13  may be a core network device in the wireless communication system, for example, the network management device  13  may be a mobility management entity (MME) in an evolved packet core (EPC). Alternatively, the network management device may also be other core network devices, such as a serving gateway (SGW), a public data network gateway (PGW), a policy and charging rules function (PCRF) or a home subscriber server (HSS). The implementation form of the network management device  13  is not limited in some embodiments of the disclosure. 
     Execution subjects involved in embodiments of the disclosure include, but are not limited to terminals that support multi-SIM and base stations. 
     Scenarios of embodiments of the disclosure may be that, currently, manners of processing multi-SIM mobile phones are based on implementation of various terminal manufacturers and there is no unified regulation standard, which leads to different terminal behaviors and processing manners, for example, dual-SIM single-standby, dual-SIM dual-standby single-pass, and dual-SIM dual-standby dual-pass. Also, it may cause the following problems. 
     1, when a multi-SIM terminal communicates with a first communication network through a first SIM, it needs to detect from time to time a second communication network established through a second SIM, such as monitoring paging, performing measurements, or reading system messages, which may affect the communication performance of the first communication network. 
     2, the paging time is calculated based on the identity of the terminal, and the multi-SIM terminal has multiple SIMs, which may cause systematic paging collisions. 
     3, when the multi-SIM terminal receives a paging message on the second communication network, it needs to determine whether it needs to respond to the paging, and this is based on rules configured by the user. When the multi-SIM terminal decides to respond to the paging message of the second communication network, it needs to stop the first communication network currently being performed. If there is no suspension mechanism for the current activity, the terminal will automatically disconnect the RRC connection with the first communication network and leave. In addition, after the terminal leaves, the first communication network will continue to page the terminal, resulting in a waste of paging resources. 
     The reason for the above problems is that the communication network side may not determine that the terminal has multiple SIMs, and thus may not coordinate communication of multiple SIMs. 
     As illustrated in  FIG.  2   , a method for information transmission is provided in some embodiments. The method for information transmission can be applicable to a wireless communication device such as a terminal. The method includes the following. 
     In step  201 , indication information that the terminal has multiple SIMs is sent to a base station in a process of establishing a RRC connection. 
     Herein the terminal may be a multi-SIM terminal. The behavior mode of the terminal may be dual-SIM dual-standby single-pass, dual-SIM dual-standby dual-pass or the like. 
     The SIM may be an SIM that exists in a separate individual form or an embedded SIM (e-SIM) that exists inside the terminal in an integrated form. 
     When the terminal has multiple SIMs, the terminal may send the indication information that the terminal has the multiple SIMs to the base station, to indicate the base station that it has the multiple SIMs. Herein the multiple SIMs may be two or more SIMs. The terminal may carry the indication information of the multiple SIMs in an uplink RRC signaling during establishing the RRC connection. The terminal may use any one of its own communication networks connected by the multiple SIMs to send the indication information of the multiple SIMs. 
     In the process of establishing the RRC connection with the base station, such as switching from the idle state to the connected state or from the inactive state to the connected state, the terminal sends the indication information that it has the multiple SIMs through the RRC signaling to the base station that establishes the RRC connection. 
     For example, an information unit may be set in the uplink RRC signaling during the RRC connection process for setting the indication information. For example, “1” can be used in the reserved bit of the uplink RRC signaling to indicate that the terminal has multiple SIMs and “0” can be used to indicate that the terminal has one SIM, or “0” can be used to indicate that the terminal has multiple SIMs and “1” can be used to indicate that the terminal has one SIM. Using the RRC signaling to carry request content indication information can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     The indication information of the multiple SIMs may also be used to indicate the number of SIMs that the terminal has. For example, two bits can be used to indicate the number of SIMs, “00” is used to indicate that the terminal has one SIM, “01” is used to indicate that the terminal has two SIMs, “10” is used to indicate that the terminal has three SIMs and “11” is used to indicate that the terminal has four SIMs. 
     After receiving the indication information of the multiple SIMs, the base station can determine that the terminal has the multiple SIMs. If the base station has different configurations or different communication manners for the single-SIM terminal and the multi-SIM terminal, it can perform different configurations or adopt different communication manners based on the indication information of the multiple SIMs. 
     In this way, when establishing the RRC connection, the terminal can explicitly inform the base station of the event that it has the multiple SIMs, through the indication information of the multiple SIMs, which improves the transparency of states of the multiple SIMs of the terminal and increases the convenience of obtaining by the base station the multiple SIMs of the terminal. The base station can obtain the above-mentioned indication information report when establishing the RRC connection with the terminal. In this way, the base station learns whether the terminal supports the multiple SIMs earlier so as to facilitate the follow-up coordination scheduling to the multiple SIMs in the multiple SIMs of the terminal. 
     In some embodiments, as illustrated in  FIG.  3   , the method for information transmission may further include the following. 
     In step  202 , a multi-SIM information request sent by the base station based on the indication information is received. 
     In step  203 , module information of at least one of the multiple SIMs is sent in response to the multi-SIM information request. 
     After determining that the terminal has the multiple SIMs, the base station can request to obtain module information of one or more SIMs by sending the multi-SIM information request. Herein the module information may include: identity information of the SIM and/or operator information accessible by the SIM and the like. The module information may also include state information of the SIM, for example, the SIM is in an on or off state. 
     After receiving the multi-SIM information request, the terminal can send the module information of one or more SIMs to the base station. 
     After obtaining the module information, the base station can determine the communication network, the operator and the working state of each SIM and then can coordinate communication of each SIM. The base station can configure communication resources for each SIM through downlink commands and the like. The allocated communication resources of each SIM may not overlap. In this way, conflicts in configuration of communication resources of each SIM can be reduced. 
     For example, when the first SIM is paged, the communication of the second SIM may be suspended. It reduces the invalid paging for the second SIM caused by the terminal responding to the paging of the first SIM and the second SIM being disconnected from the communication network. 
     In some embodiments, step  202  may include: receiving a UEInformationRequest signaling carrying the multi-SIM information request from the base station. 
     Step  203  may include: sending a UEInformationResponse signaling carrying the module information. 
     The base station may carry the multi-SIM information request in the UEInformationRequest signaling, to request the terminal to obtain module information of multiple SIMs. The multi-SIM information request may be carried in the UEInformationRequest signaling in the form of a MUSIMInfoReq information unit. 
     The terminal can send the module information to the base station through the UEInformationResponse signaling. The module information can be carried in the UEInformationResponse signaling in the form of a MUSIMInfoReport information unit. 
     Carrying the multi-SIM information request and/or module information in the RRC signaling can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     In some embodiments, the method for information transmission may further include: receiving request content indication information, in which the request content indication information is configured to indicate module information of a SIM requested by the base station. 
     Step  203  may include: sending module information of at least one SIM indicated by the request content indication information. 
     Herein the request content indication information. The module information may include: identity information of the SIM, and/or operator information accessible by the SIM, and/or state information of the SIM. The base station may receive the module information requested by the request content indication information based on communication requirements of the SIM. 
     For example, it may indicate that only the identity information of the SIM is required. The multi-SIM information request and the request content indication information can be sent to the terminal through the same signaling. 
     After receiving the request content indication information, the terminal sends the corresponding SIM module information to the base station based on the module information requested by the base station. 
     In some embodiments, receiving the request content indication information includes: receiving a MUSIMInfoReportConfig signaling, in which the MUSIMInfoReportConfig signaling carries the request content indication information. 
     The base station may carry the multi-SIM information request in the UEInformationRequest signaling to request the terminal to obtain module information of multiple SIMs. The UEInformationRequest signaling may also carry the request content indication information to indicate the module information requested. The multi-SIM information request may be carried in the UEInformationRequest signaling in the form of a MUSIMInfoReq information unit, and the request content indication information may be carried in the UEInformationRequest signaling in the form of a MUSIMInfoReq information unit. 
     Carrying the request content indication information in the RRC signaling, or carrying the request content indication information at the same time as the multi-SIM information request, can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the new added signaling and reduce the development workload. 
     In some embodiments, the module information of the SIM includes: identity information and/or IMEI information. 
     The module information may include: identity information and/or IMEI information and the like, and the base station may determine the communication network to which each SIM belongs based on the identity information and/or IMEI information and the like. 
     For different cellular mobile communication networks, the indication information that the terminal has the multiple SIMs can be carried in different signalings. 
     For example, for a fourth generation (4G) network, the indication information of the multiple SIMs may be carried in a RRCConnectionReconfigurationComplete signaling, a RRCConnectionReestablishmentComplete signaling, a RRCConnectionResumeComplete signaling, or a RRCConnectionSetupComplete signaling. The indication information of the multiple SIMs may be the MUSIMInfoAvailable information unit in the above-mentioned signalings. 
     Therefore, in some embodiments, step  201  may include: sending a RRCConnectionReconfigurationComplete signaling, a RRCConnectionReestablishmentComplete signaling, a RRCConnectionResumeComplete signaling, or a RRCConnectionSetupComplete signaling, that carries the indication information. 
     For example, using the MUSIMInfoAvailable information unit to carry the indication information may use the following code: 
     MUSIMInfoAvailable-r17 ENUMERATED {true} OPTIONAL 
     If the terminal has multiple SIMs, MUSIMInfoAvailable-r17 in the RRCConnectionReconfigurationComplete-v1700-IEs may be set to True. If the terminal does not have multiple SIMs, MUSIMInfoAvailable-r17 may be not included in the RRCConnectionReconfigurationComplete-v1700-IEs. 
     Carrying the request content indication information in the RRC signaling can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     For example, for a fifth generation (5G) network, a RRCReconfigurationComplete signaling, a RRCReestablishmentComplete signaling, a RRC ResumeComplete, or a RRCSetupComplete signaling may carry the indication information of the multiple SIMs. Specifically, the indication information of the multiple SIMs may be the MUSIMInfoAvailable information unit in the above-mentioned signalings. 
     In some embodiments, step  201  may include: sending a RRCReconfigurationComplete signaling, a RRCReestablishmentComplete signaling, a RRCResumeComplete signaling, or a RRCSetupComplete signaling, that carries the indication information. 
     For example, using the MUSIMInfoAvailable information unit to carry the indication information may use the following code: 
     MUSIMInfoAvailable-r17 ENUMERATED {true} OPTIONAL 
     If the terminal has multiple SIMs, MUSIMInfoAvailable-r17 in the RRCConnectionReconfigurationComplete-v1700-IEs can be set to True. If the terminal does not have multiple SIMs, MUSIMInfoAvailable-r17 is not included in the RRCConnectionReconfigurationComplete-v1700-IEs. 
     Carrying the request content indication information in the RRC signaling can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     As illustrated in  FIG.  4   , some embodiments provide a method for information transmission. The method for information transmission may be used in wireless communication. The method for information transmission may include the following. 
     In step  401 , indication information is received in a process of establishing a RRC connection by a terminal, in which the indication information is sent by the terminal in response to having at least two SIMs. 
     In step  402 , it is determined that the terminal has the at least two SIMs according to the indication information. 
     Herein the terminal may be a multi-SIM terminal. The behavior mode of the terminal may be dual-SIM dual-standby single-pass, dual-SIM dual-standby dual-pass or the like. 
     The SIM may be an SIM that exists in a separate individual form or an embedded SIM (e-SIM) that exists inside the terminal in an integrated form. 
     When the terminal has multiple SIMs, the terminal may send the indication information that the terminal has the multiple SIMs to the base station, to indicate the base station that it has the multiple SIMs. Herein the multiple SIMs may be two or more SIMs. The terminal may carry the indication information of the multiple SIMs in an uplink RRC signaling during establishing the RRC connection. The terminal may use any one of its own communication networks connected by the multiple SIMs to send the indication information of the multiple SIMs. 
     In the process of establishing the RRC connection with the base station, such as switching from the idle state to the connected state or from the inactive state to the connected state, the terminal sends the indication information that it has the multiple SIMs through the RRC signaling to the base station that establishes the RRC connection. 
     For example, an information unit may be set in the uplink RRC signaling during the RRC connection process for setting the indication information. For example, “1” can be used in the reserved bit of the uplink RRC signaling to indicate that the terminal has multiple SIMs and “0” can be used to indicate that the terminal has one SIM, or “0” can be used to indicate that the terminal has multiple SIMs and “1” can be used to indicate that the terminal has one SIM. Using the RRC signaling to carry request content indication information can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     The indication information of the multiple SIMs may also be used to indicate the number of SIMs that the terminal has. For example, two bits can be used to indicate the number of SIMs, “00” is used to indicate that the terminal has one SIM, “01” is used to indicate that the terminal has two SIMs, “10” is used to indicate that the terminal has three SIMs and “11” is used to indicate that the terminal has four SIMs. 
     After receiving the indication information of the multiple SIMs, the base station can determine that the terminal has the multiple SIMs. If the base station has different configurations or different communication manners for the single-SIM terminal and the multi-SIM terminal, it can perform different configurations or adopt different communication manners based on the indication information of the multiple SIMs. 
     In this way, when establishing the RRC connection, the terminal can explicitly inform the base station of the event that it has the multiple SIMs, through the indication information of the multiple SIMs, which improves the transparency of states of the multiple SIMs of the terminal and increases the convenience of obtaining by the base station the multiple SIMs of the terminal. The base station can obtain the above-mentioned indication information report when establishing the RRC connection with the terminal. In this way, the base station learns whether the terminal supports the multiple SIMs earlier so as to facilitate the follow-up coordination scheduling to the multiple SIMs in the multiple SIMs of the terminal. 
     In some embodiments, the method for information transmission may further include: sending a multi-SIM information request in response to determining that the terminal has the at least two SIMs, in which the multi-SIM information request is configured to indicate the terminal to send module information of at least one SIM; and receiving the module information of the at least one SIM sent by the terminal in response to the multi-SIM information request. 
     After determining that the terminal has the multiple SIMs, the base station can request to obtain module information of one or more SIMs by sending the multi-SIM information request. Herein the module information may include: identity information of the SIM and/or operator information accessible by the SIM and the like. The module information may also include state information of the SIM, for example, the SIM is in an on or off state. 
     After receiving the multi-SIM information request, the terminal can send the module information of one or more SIMs to the base station. 
     After obtaining the module information, the base station can determine the communication network, the operator and the working state of each SIM and then can coordinate communication of each SIM. The base station can configure communication resources for each SIM through downlink commands and the like. The allocated communication resources of each SIM may not overlap. In this way, conflicts in configuration of communication resources of each SIM can be reduced. 
     For example, when the first SIM is paged, the communication of the second SIM may be suspended. It reduces the invalid paging for the second SIM caused by the terminal responding to the paging of the first SIM and the second SIM being disconnected from the communication network. 
     In some embodiments, sending the multi-SIM information request includes sending a UEInformationRequest signaling carrying the multi-SIM information request. Receiving the module information of the at least one SIM sent by the terminal in response to the multi-SIM information request includes receiving a UEInformationResponse signaling carrying the module information. 
     The base station may carry the multi-SIM information request in the UEInformationRequest signaling, to request the terminal to obtain module information of multiple SIMs. The multi-SIM information request may be carried in the UEInformationRequest signaling in the form of a MUSIMInfoReq information unit. 
     The terminal can send the module information to the base station through the UEInformationResponse signaling. The module information can be carried in the UEInformationResponse signaling in the form of a MUSIMInfoReport information unit. 
     Carrying the multi-SIM information request and/or module information in the RRC signaling can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     In some embodiments, the method for information transmission further includes: sending request content indication information, in which the request content indication information is configured to indicate module information of a SIM; receiving the module information of the at least one SIM sent by the terminal in response to the multi-SIM information request includes receiving module information of at least one SIM indicated by the request content indication information. 
     Herein module information may include: identity information of the SIM, and/or operator information accessible by the SIM, and/or state information of the SIM. The base station may receive the module information requested by the request content indication information based on communication requirements of the SIM. The request content indication information, for example, may indicate that only the identity information of the SIM is required. The multi-SIM information request and the request content indication information can be sent to the terminal through the same signaling. 
     After receiving the request content indication information, the terminal sends the corresponding SIM module information to the base station based on the module information requested by the base station. 
     In some embodiment, step  401  may include: sending a MUSIMInfoReportConfig signaling, in which the MUSIMInfoReportConfig signaling carries the request content indication information. 
     The base station may carry the multi-SIM information request in the UEInformationRequest signaling to request the terminal to obtain module information of multiple SIMs. The UEInformationRequest signaling may also carry the request content indication information to indicate the module information requested. The multi-SIM information request may be carried in the UEInformationRequest signaling in the form of a MUSIMInfoReq information unit, and the request content indication information may be carried in the UEInformationRequest signaling in the form of a MUSIMInfoReq information unit. 
     Carrying the request content indication information in the RRC signaling, or carrying the request content indication information at the same time as the multi-SIM information request, can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the new added signaling and reduce the development workload. 
     In some embodiments, the module information of the SIM includes: identity information and/or IMEI information. 
     The module information may include: identity information and/or IMEI information and the like, and the base station may determine the communication network to which each SIM belongs based on the identity information and/or IMEI information and the like. 
     For different cellular mobile communication networks, the indication information that the terminal has the multiple SIMs can be carried in different signalings. 
     For example, for a 4G network, the indication information of the multiple SIMs may be carried in a RRCConnectionReconfigurationComplete signaling, a RRCConnectionReestablishmentComplete signaling, a RRCConnectionResumeComplete signaling, or a RRCConnectionSetupComplete signaling. The indication information of the multiple SIMs may be the MUSIMInfoAvailable information unit in the above-mentioned signalings. 
     Therefore, in some embodiments, step  401  may include: receiving a RRCConnectionReconfigurationComplete signaling, a RRCConnectionReestablishmentComplete signaling, a RRCConnectionResumeComplete signaling, or a RRCConnectionSetupComplete signaling, that carries the indication information. 
     For example, using the MUSIMInfoAvailable information unit to carry the indication information may use the following code: 
     MUSIMInfoAvailable-r17 ENUMERATED {true} OPTIONAL 
     If the terminal has multiple SIMs, MUSIMInfoAvailable-r17 in the RRCConnectionReconfigurationComplete-v1700-IEs may be set to True. If the terminal does not have multiple SIMs, MUSIMInfoAvailable-r17 may be not included in the RRCConnectionReconfigurationComplete-v1700-IEs. 
     Carrying the request content indication information in the RRC signaling can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     For example, for a fifth generation (5G) network, a RRCReconfigurationComplete signaling, a RRCReestablishmentComplete signaling, a RRC ResumeComplete, or a RRCSetupComplete signaling may carry the indication information of the multiple SIMs. Specifically, the indication information of the multiple SIMs may be the MUSIMInfoAvailable information unit in the above-mentioned signalings. 
     Therefore, in some embodiments, step  401  may include: receiving a RRCReconfigurationComplete signaling, a RRCReestablishmentComplete signaling, a RRCResumeComplete signaling, or a RRCSetupComplete signaling, that carries the indication information. 
     For example, using the MUSIMInfoAvailable information unit to carry the indication information may use the following code: 
     MUSIMInfoAvailable-r17 ENUMERATED {true} OPTIONAL 
     If the terminal has multiple SIMs, MUSIMInfoAvailable-r17 in the RRCConnectionReconfigurationComplete-v1700-IEs can be set to True. If the terminal does not have multiple SIMs, MUSIMInfoAvailable-r17 is not included in the RRCConnectionReconfigurationComplete-v1700-IEs. 
     Carrying the request content indication information in the RRC signaling can improve the utilization efficiency of the RRC signaling, reduce the interaction complexity caused by the newly added signaling and reduce the development workload. 
     An example is provided below in conjunction with any of the foregoing embodiments. 
     The disclosure proposes a method for interacting information of dual SIMs. When a multi-SIM terminal establishes an RRC connection with a base station (that is, becomes a connected state), it can notify the base station establishing the RRC connection, of the multi-SIM event through the RRC signaling. For the 4G network, it can be notified through a RRCConnectionReconfigurationComplete signaling, a RRCConnectionReestablishmentComplete signaling, a RRCConnectionResumeComplete, or a RRCConnectionSetupComplete signaling. In detail, it can be notified through the MUSIMInfoAvailable information unit in these signalings. For 5G networks, it can be notified through a RRCReconfigurationComplete signaling, a RRCReestablishmentComplete signaling, a RRCResumeComplete signaling or a RRCSetupComplete. In detail, it can be notified through the MUSIMInfoAvailable information unit in these signalings. 
     Taking the RRCConnectionReconfigurationComplete signaling as an example, the RRCConnectionReconfigurationComplete signaling is used to confirm the successful completion of the RRC connection reconfiguration. The content of the RRCConnectionReconfigurationComplete signaling may include: 
     
       
         
           
               
             
               
                   
               
             
            
               
                 Signalling radio bearer: SRB1 
               
               
                 RLC-SAP: AM 
               
               
                 Logical channel: DCCH 
               
               
                 Direction: UE to E-UTRAN 
               
               
                 RRCConnectionReconfigurationComplete message 
               
               
                 -- ASN1START 
               
               
                 RRCConnectionReconfigurationComplete :: =SEQUENCE { 
               
            
           
           
               
               
            
               
                 rrc-TransactionIdentifier 
                 RRC-TransactionIdentifier, 
               
               
                 criticalExtensions 
                 CHOICE { 
               
            
           
           
               
            
               
                   rrcConnectionReconfigurationComplete-r8 
               
            
           
           
               
               
            
               
                   
                  RRCConnectionReconfigurationComplete-r8-IEs, 
               
            
           
           
               
            
               
                   criticalExtensionsFuture SEQUENCE { } 
               
               
                  } 
               
               
                 } 
               
               
                 ...... 
               
               
                 RRCConnectionReconfigurationComplete-v1530-IEs :: = SEQUENCE { 
               
            
           
           
               
               
               
            
               
                  logMeasAvailableBT-r15 
                    ENUMERATED {true} 
                  OPTIONAL, 
               
               
                  logMeasAvailableWLAN-r15 
                    ENUMERATED {true} 
                  OPTIONAL, 
               
               
                  flightPathInfoAvailable-r15 
                    ENUMERATED {true} 
                  OPTIONAL, 
               
            
           
           
               
            
               
                  nonCriticalExtension RRCConnectionReconfigurationComplete-v1700-IEs 
               
               
                  OPTIONAL 
               
               
                 } 
               
               
                 RRCConnectionReconfigurationComplete-v1700-IEs :: = SEQUENCE { 
               
            
           
           
               
               
               
            
               
                  MUSIMInfoAvailable-r17 
                   ENUMERATED {true} 
                 OPTIONAL, 
               
               
                  nonCriticalExtension 
                   SEQUENCE { } 
                  OPTIONAL 
               
            
           
           
               
            
               
                 } 
               
               
                 -- ASN1STOP 
               
               
                   
               
            
           
         
       
     
     After receiving the RRC signaling, the base station learns that the terminal has multi-SIM information. If the base station wants to obtain information about multiple SIMs of the terminal, such as identity information, it requests the terminal to obtain the multi-SIM information of the terminal through the RRC signaling. It can also specify in the signaling which information want to obtain, such as identity information, IMEI information, etc., such as, in the UEInformationRequest signaling, more specifically, through the MUSIMInfoReq information unit in the UEInformationRequest signaling to request. Optionally, it can also use the MUSIMInfoReportConfig signaling to indicate the specific information want to obtain. 
     Taking the UEInformationRequest signaling as an example, the UEInformationRequest signaling is a command used by the base station to retrieve information from the terminal. The content of UEInformationRequest signaling may include: 
     
       
         
           
               
             
               
                   
               
             
            
               
                   RLC-SAP: AM 
               
               
                   Logical channel: DCCH 
               
               
                   Direction: E-UTRAN to UE 
               
               
                   UEInformationRequest message 
               
               
                   -- ASN1START 
               
            
           
           
               
               
            
               
                   UEInformationRequest-r9 :: = 
                  SEQUENCE { 
               
               
                    rrc-TransactionIdentifier 
                 RRC-TransactionIdentifier, 
               
               
                    criticalExtensions 
                 CHOICE { 
               
               
                     c1 
                  CHOICE { 
               
               
                      ueInformationRequest-r9 
                   UEInformationRequest-r9-IEs, 
               
            
           
           
               
            
               
                      spare3 NULL, spare2 NULL, spare 1 NULL 
               
               
                     }, 
               
            
           
           
               
               
            
               
                     criticalExtensionsFuture 
                    SEQUENCE { } 
               
            
           
           
               
            
               
                    } 
               
               
                   } 
               
               
                   ...... 
               
               
                   UEInformationRequest-v1530-IEs :: = SEQUENCE { 
               
               
                    idleModeMeasurementReq-r15 ENUMERATED {true} OPTIONAL, -- Need ON 
               
            
           
           
               
               
            
               
                    flightPathInfoReq-r15 
                  FlightPathInfoReportConfig-r15 PTIONAL, -- 
               
            
           
           
               
            
               
                 Need ON 
               
            
           
           
               
               
            
               
                    nonCriticalExtension 
                  UEInformationRequest-v1700-IEs OPTIONAL 
               
            
           
           
               
            
               
                   } 
               
               
                   UEInformationRequest-v1700-IEs :: = SEQUENCE { 
               
            
           
           
               
               
            
               
                   MUSIMInfoReq-r17 MUSIMInfoReportConfig-r17 
                 OPTIONAL, -- Need ON 
               
               
                    nonCriticalExtension SEQUENCE { } 
                 OPTIONAL 
               
            
           
           
               
            
               
                   } 
               
               
                  -- ASN1STOP 
               
               
                   
               
            
           
         
       
     
     After receiving the RRC signaling with the multi-SIM information request sent by the base station, the terminal with multi-SIM information sends its own multi-SIM information to the base station through the RRC signaling. Specifically, it can use the UEInformationResponse signaling. More specifically, it can be sent through the MUSIMInfoReport information unit in UEInformationResponse signaling. 
     Taking the UEInformationResponse signaling as an example, the terminal uses the UEInformationResponse signaling to transmit information requested by the base station. The content of the signaling may include: 
     
       
         
           
               
             
               
                   
               
             
            
               
                  RLC-SAP: AM 
               
               
                  Logical channel: DCCH 
               
               
                  Direction: UE to E-UTRAN 
               
               
                  UEInformationResponse message 
               
               
                  -- ASN1START 
               
            
           
           
               
               
            
               
                  UEInformationResponse-r9 
                   ::= SEQUENCE { 
               
               
                   rrc-TransactionIdentifier 
                    RRC-TransactionIdentifier, 
               
               
                   criticalExtensions 
                 CHOICE { 
               
               
                    c1 
                     CHOICE { 
               
            
           
           
               
            
               
                      ueInformationResponse-r9 UEInformationResponse-r9-IEs, 
               
               
                      spare3 NULL, spare2 NULL, spare1 NULL 
               
               
                   }, 
               
            
           
           
               
               
            
               
                     criticalExtensionsFuture 
                      SEQUENCE { } 
               
            
           
           
               
            
               
                   } 
               
               
                  } 
               
               
                  ...... 
               
               
                  UEInformationResponse-v1530-IEs :: = SEQUENCE { 
               
            
           
           
               
               
               
            
               
                   measResultListIdle-r15 
                   MeasResultListIdle-r55 
                  OPTIONAL, 
               
               
                   flightPathInfoReport-r15 
                    FlightPathInfoReport-r15 
                  OPTIONAL, 
               
            
           
           
               
               
            
               
                   nonCriticalExtension UEInformationResponse-v1700-IEs 
                  OPTIONAL 
               
            
           
           
               
            
               
                  } 
               
               
                  UEInformationResponse-v1700-IEs :: = SEQUENCE { 
               
            
           
           
               
               
               
            
               
                   MUSIMInfoReport-r17 
                  MUSIMInfoReport-r17 
                 OPTIONAL, 
               
               
                   nonCriticalExtension 
                  SEQUENCE { } 
                 OPTIONAL 
               
            
           
           
               
            
               
                  } 
               
               
                  MUSIMInfoReport-r17 ::= SEQUENCE { 
               
            
           
           
               
               
            
               
                   MUSIM-r17 SEQUENCE (SIZE (1..maxSIM-r17)) OF SIMInfo-r17 
                    OPTIONAL, 
               
            
           
           
               
               
               
            
               
                   nonCriticalExtension 
                  SEQUENCE { } 
                    OPTIONAL 
               
            
           
           
               
            
               
                  } 
               
               
                 -- ASN1STOP 
               
               
                   
               
            
           
         
       
     
     Some embodiments of the disclosure also provide an apparatus for information transmission, which is applicable to a terminal.  FIG.  5    is a block diagram of an apparatus  100  for information transmission according to some embodiments of the disclosure. As illustrated in  FIG.  5   , the apparatus  100  includes a first sending module  110 . 
     The first sending module  110  is configured to send indication information that the terminal has multiple SIMs to a base station in a process of establishing a RRC connection. 
     In some embodiments, the apparatus  100  further includes a first receiving module  120  and a second sending module  130 . The first receiving module  120  is configured to receive a multi-SIM information request sent by the base station based on the indication information. The second sending module  130  is configured to send module information of at least one of the multiple SIMs in response to the multi-SIM information request. 
     In some embodiment, the first receiving module  120  includes: a first receiving submodule  121  configured to receive a UEInformationRequest signaling carrying the multi-SIM information request from the base station; and the second sending module  130  includes a first sending submodule  131  configured to send a UEInformationResponse signaling carrying the module information. 
     In some embodiment, the apparatus  100  further includes a second receiving module  140  configured to receive request content indication information, wherein the request content indication information is configured to indicate module information of a SIM requested by the base station. The second sending module  130  includes a second sending submodule  132  configured to send module information of at least one SIM indicated by the request content indication information. 
     In some embodiment, the second receiving module  140  includes a second receiving submodule  141  configured to receive a MUSIMInfoReportConfig signaling, in which the MUSIMInfoReportConfig signaling carries the request content indication information. 
     In some embodiment, the module information of the SIM includes identity information, and/or IMEI information. 
     In some embodiment, the first sending module  110  includes a third sending submodule  111  configured to, in response to a connection between the terminal and the base station being a first network standard, send a RRCConnectionReconfigurationComplete signaling, a RRCConnectionReestablishmentComplete signaling, a RRCConnectionResumeComplete signaling, or RRCConnectionSetupComplete signaling, that carries the indication information. 
     In some embodiment, the first sending module  110  includes a fourth sending submodule  112  configured to, in response to a connection between the terminal and the base station being a second network standard, send a RRCReconfigurationComplete signaling, a RRCReestablishmentComplete signaling, a RRCResumeComplete signaling, or a RRCSetupComplete signaling, that carries the indication information. 
     Some embodiments of the disclosure also provide an apparatus for information transmission, which is applicable to a base station.  FIG.  6    is a block diagram of an apparatus  200  for information transmission according to some embodiments of the disclosure. As illustrated in  FIG.  6   , the apparatus  200  includes a third receiving module  210  and a determining module  220 . 
     The third receiving module  210  is configured to receive indication information in a process of establishing a RRC connection by a terminal, in which the indication information is sent by the terminal in response to having at least two SIMs. 
     The determining module  220  is configured to determine that the terminal has the at least two SIMs according to the indication information. 
     In some embodiment, the apparatus  200  further includes a third sending module  230  configured to send a multi-SIM information request in response to determining that the terminal has the at least two SIMs, in which the multi-SIM information request is configured to indicate the terminal to send module information of at least one SIM; and a fourth receiving module  240  configured to receive the module information of the at least one SIM sent by the terminal in response to the multi-SIM information request. 
     In some embodiment, the third sending module  230  includes a fifth sending submodule  231  configured to send a UEInformationRequest signaling carrying the multi-SIM information request; and the fourth receiving module  240  includes a third receiving submodule  241  configured to receive a UEInformationResponse signaling carrying the module information. 
     In some embodiment, the apparatus further includes a fourth sending module  250  configured to send request content indication information, in which the request content indication information is configured to indicate module information of a SIM; and the fourth receiving module  240  includes a fourth receiving submodule  242  configured to receive module information of at least one SIM indicated by the request content indication information. 
     In some embodiment, the fourth sending module  250  includes a sixth sending submodule  251  configured to send a MUSIMInfoReportConfig signaling, in which the MUSIMInfoReportConfig signaling carries the request content indication information. 
     In some embodiment, the module information of the SIM includes identity information, and/or IMEI information. 
     In some embodiment, the third receiving module  210  includes a fifth receiving submodule  211  configured to, in response to a connection between the terminal and the base station being a first network standard, receive a RRCConnectionReconfigurationComplete signaling, a RRCConnectionReestablishmentComplete signaling, a RRCConnectionResumeComplete signaling, or RRCConnectionSetupComplete signaling, that carries the indication information. 
     In some embodiment, the third receiving module  210  includes a sixth receiving submodule  232  configured to, in response to a connection between the terminal and the base station being a second network standard, receive a RRCReconfigurationComplete signaling, a RRCReestablishmentComplete signaling, a RRCResumeComplete signaling, or a RRCSetupComplete signaling, that carries the indication information. 
     According to the method for information transmission, communication device and the storage medium provided by embodiments of the disclosure, the terminal sends the indication information that the terminal has the multiple SIMs to the base station during the process of establishing the RRC connection. In this way, when establishing the RRC connection, the terminal can explicitly inform the base station of the event that it has the multiple SIMs, through the indication information of the multiple SIMs, which improves the transparency of states of the multiple SIMs of the terminal and increases the convenience of obtaining by the base station the multiple SIMs of the terminal. The base station can obtain the above-mentioned indication information report when establishing the RRC connection with the terminal. In this way, the base station learns whether the terminal supports the multiple SIMs earlier so as to facilitate the follow-up coordination scheduling to the multiple SIMs in the multiple SIMs of the terminal. 
     In some embodiments, the above modules and submodules may be implemented by one or more central processing units (CPU), a graphics processing unit (GPU), a baseband processor (BP), an application specific integrated circuit (ASIC), DSP, a programmable logic device (PLD), a complex programmable logic device (CPLD), a field programmable gate array (FPGA), a general purpose processor, a controller, a micro controller unit (MCU), a microprocessor or other electronic components in combination with one or more radio frequency (RF) antennas to perform the foregoing methods. 
       FIG.  7    is a block diagram of a device  3000  for information transmission according to some embodiments. For example, the device  3000  may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a gaming console, a tablet, a medical device, exercise equipment, a personal digital assistant, and the like. 
     Referring to  FIG.  8   , the device  3000  may include one or more of the following components: a processing component  3002 , a memory  3004 , a power component  3006 , a multimedia component  3008 , an audio component  3010 , an input/output (I/O) interface  3012 , a sensor component  3014 , and a communication component  3016 . 
     The processing component  3002  typically controls overall operations of the device  3000 , such as the operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component  3002  may include one or more processors  3020  to execute instructions to perform all or part of the steps in the above described methods. Moreover, the processing component  3002  may include one or more modules which facilitate the interaction between the processing component  3002  and other components. For instance, the processing component  3002  may include a multimedia module to facilitate the interaction between the multimedia component  3008  and the processing component  3002 . 
     The memory  3004  is configured to store various types of data to support the operation of the device  3000 . Examples of such data include instructions for any disclosures or methods operated on the device  3000 , contact data, phonebook data, messages, pictures, video, etc. The memory  3004  may be implemented using any type of volatile or non-volatile memory devices, or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic or optical disk. 
     The power component  3006  provides power to various components of the device  3000 . The power component  3006  may include a power management system, one or more power sources, and any other components associated with the generation, management, and distribution of power in the device  3000 . 
     The multimedia component  3008  includes a screen providing an output interface between the device  3000  and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes the touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may not only sense a boundary of a touch or swipe action, but also sense a period of time and a pressure associated with the touch or swipe action. In some embodiments, the multimedia component  3008  includes a front camera and/or a rear camera. The front camera and the rear camera may receive an external multimedia datum while the device  3000  is in an operation mode, such as a photographing mode or a video mode. Each of the front camera and the rear camera may be a fixed optical lens system or have focus and optical zoom capability. 
     The audio component  3010  is configured to output and/or input audio signals. For example, the audio component  3010  includes a microphone (“MIC”) configured to receive an external audio signal when the device  3000  is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may be further stored in the memory  3004  or transmitted via the communication component  3016 . In some embodiments, the audio component  3010  further includes a speaker to output audio signals. 
     The I/O interface  3012  provides an interface between the processing component  3002  and peripheral interface modules, such as a keyboard, a click wheel, buttons, and the like. The buttons may include, but are not limited to, a home button, a volume button, a starting button, and a locking button. 
     The sensor component  3014  includes one or more sensors to provide status assessments of various aspects of the device  3000 . For instance, the sensor component  3014  may detect an open/closed status of the device  3000 , relative positioning of components, e.g., the display and the keypad, of the device  3000 , a change in position of the device  3000  or a component of the device  3000 , a presence or absence of user contact with the device  3000 , an orientation or an acceleration/deceleration of the device  3000 , and a change in temperature of the device  3000 . The sensor component  3014  may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component  3014  may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging disclosures. In some embodiments, the sensor component  3014  may also include an accelerometer sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor. 
     The communication component  3016  is configured to facilitate communication, wired or wirelessly, between the device  3000  and other devices. The device  3000  can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component  3016  receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component  3016  further includes a near field communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on a radio frequency identification (RFID) technology, an infrared data association (IrDA) technology, an ultra-wideband (UWB) technology, a Bluetooth (BT) technology, and other technologies. 
     In exemplary embodiments, the device  3000  may be implemented with one or more disclosure specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components, for performing the above described methods. 
     In exemplary embodiments, there is also provided a non-transitory computer-readable storage medium including instructions, such as included in the memory  3004 , executable by the processor  820  in the device  3000 , for performing the above-described methods. For example, the non-transitory computer-readable storage medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disc, an optical data storage device, and the like. 
     Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed here. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following the general principles thereof and including such departures from the disclosure as come within known or customary practice in the art. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims. 
     It will be appreciated that the present disclosure is not limited to the exact construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. It is intended that the scope of the disclosure only be limited by the appended claims.