DE102020117570A1 - Mobile radio communication device with two integrated subscriber identity modules and an interface with network-dependent OFDM modulation - Google Patents

Abstract

The invention relates to a cellular communication device for wireless communication over a first cellular network and a second cellular network, the cellular communication device having a cellular communication interface with a first integrated subscriber identity module, iSIM: Integrated Subscriber Identity, and a second integrated subscriber identity module has for communication with the first cellular network and the second cellular network. A first mobile radio subscriber identifier and a first OFDM modulation parameter are permanently stored in the first iSIM, and a second mobile radio subscriber identifier and a second OFDM modulation parameter are permanently stored in the second iSIM. An OFDM modulator of the communication interface is designed to modulate first transmission data according to the first OFDM modulation parameter in order to receive first OFDM transmission data for transmission to the first cellular network and to modulate second transmission data according to the second OFDM modulation parameter in order to obtain second OFDM transmission data for transmission to the second cellular network.

Description

The present invention relates to a cellular communication device with two integrated subscriber identity modules and a cellular communication interface for network-dependent OFDM (orthogonal frequency division multiplexing) data modulation and a method for cellular communication using two integrated subscriber identity modules and network-dependent OFDM data modulation using a cellular communication interface .

Cellular networks have been installed in order to provide the network subscriber with a variety of services. Different network operators offer different services in different versions and at different prices. There are therefore many reasons to use more than one SIM card in the same cellular communication device, in particular to separate private and business calls, avoiding a SIM card change when abroad and the targeted use of different tariffs, such as telephone calls. and flat-rate data tariffs. Cellular communication devices with two SIM cards are particularly popular where there are lower prices for calls between customers of the same provider. Such devices enable users to have separate contact lists on each SIM card and do roaming, i.e. the ability of a cellular network subscriber to independently receive or make calls, send and send data in a cellular network other than their home network receiving or having access to other cellular network services is easier.

Devices with multiple SIM cards are also increasingly being used in the loT (Internet of Things) area to network machines. Such devices make it possible to network not only machines, but also physical and virtual objects in general, and to let them work together through communication. Functions implemented with technologies of the “Internet of Things” allow interaction between humans and any electronic systems networked via this, as well as between the systems themselves. The aim of the Internet of Things is to automatically capture relevant information from the real world, link it with one another and make it available in the network. For this purpose, communication networks based on the 5G system architecture are increasingly being used, as outlined, for example, in the 3GPP TS 23.501 specification.

It is the object of the present invention to create a concept for cellular radio communication which allows human-to-human, human-to-machine and / or machine-to-machine communication over multiple cellular networks in a simple manner.

In particular, it is the object of the present invention to provide a mobile radio communication device which can communicate via different mobile radio networks and network technologies, in particular via different network slices of the 5G system architecture.

This object is achieved by the features of the independent claims. The dependent claims relate to advantageous forms of further training.

The mobile radio communication devices and communication systems presented below can be of various types. The individual elements described can be implemented using software or hardware components and can be produced using various technologies. The individual components can include, for example, microprocessors, semiconductor chips, ASICs, signal processors, electro-optical circuits, integrated electrical circuits and / or passive components.

The mobile radio communication devices and mobile radio networks presented below can include various technologies and network standards, for example in accordance with the 5G system architecture. The 5G system architecture includes the concept of network slicing, i.e. the division of the communication network into individual pieces or slices or sub-networks. Network slicing is a form of virtual network architecture in which network architectures are partitioned into virtual elements that can be linked to one another (also via software). The concept of network slicing allows multiple virtual networks to be created on a common physical infrastructure. The virtual networks can then be adapted to the specific requirements of applications, services, devices, customers or operators. Each virtual network (network slice) comprises an independent set of logical network functions that support the requirements of the respective application.

Each of these virtual networks or network slices provides resources and network topology for a specific service and traffic that uses the corresponding segment. Functions such as speed, capacity, connectivity and coverage can be assigned to meet the specific requirements of each application, but functional components can also be shared across different network slices. Can do this Each network slice is given management capabilities that can be controlled by the network operator or user depending on the application. The network slices can be managed and orchestrated independently.

The cellular networks described below can be based on 5G networks in accordance with the 5G system architecture. The service-oriented 5G network supports very different services with very different performance requirements. For example, 5G supports the three different service categories Enhanced Mobile Broadband (eMBB), massive machine type communication (mMTC, also known as loT, i.e. Internet of Things) and ultra-reliable communication with low latency (UR-LLC).

The cellular radio communication devices described below comprise a cellular radio communication interface, or simply referred to as a communication interface, which performs a large number of tasks. Such a communication interface can for example comprise a processor which is responsible for the described execution of the tasks. The term “processor” refers to any device that can be used to process certain tasks (or blocks or steps). A processor may be a single processor, a multi-core processor, or may include a set of processors, or may include means for processing. A processor can handle software or firmware or applications and so on.

According to a first aspect, the invention relates to a cellular communication device for wireless communication via a first cellular network and via a second cellular network, the first cellular network having a first network identification and the second cellular network having a second network identification, with the following features: a cellular communication interface for communication with the first cellular network and the second cellular network, the communication interface having a first integrated subscriber identity module, iSIM: Integrated Subscriber Identity, and a second integrated subscriber identity module, the first integrated subscriber identity module being implemented as an embedded integrated circuit and permanently stores a first mobile radio subscriber identifier and a first OFDM modulation parameter of an OFDM modulation scheme, the second integrated subscriber identity message dul is implemented as an embedded integrated circuit and permanently stores a second cellular subscriber identifier and a second OFDM modulation parameter of the OFDM modulation scheme, the first cellular subscriber identifier identifying the first integrated subscriber identity module in the first cellular network, and the second cellular network - Subscriber identifier identifies the second integrated subscriber identity module in the second cellular network, the first OFDM modulation parameter indicating first OFDM modulation frequencies, the second OFDM modulation parameter indicating second OFDM modulation frequencies that differ from the first OFDM modulation frequencies, the The cellular radio communication interface further comprises an OFDM modulator for executing the OFDM modulation scheme; a first data memory which is set up to store first data for forwarding to the first cellular network; a second data memory which is designed to store second data for forwarding to the second cellular network; wherein the cellular communication interface is designed to transmit data to the first cellular network, and is further designed to read out the first data from the first data memory and the first cellular subscriber identifier from the first integrated subscriber identity module in order to transmit first transmission data to the first To obtain a mobile radio network, the mobile radio communication interface being designed to read the first OFDM modulation parameter from the first integrated subscriber identity module and to transmit the first OFDM modulation parameter to the OFDM modulator, the OFDM modulator being designed to transmit the first transmission data to modulate according to the first OFDM modulation parameter in order to obtain first OFDM transmission data, the mobile radio communication interface being designed to transmit the first OFDM transmission data to the first mobile radio network; and wherein the cellular communication interface is designed to transmit data to the second cellular network, and is also designed to read out the second data from the second data memory and the second cellular subscriber identifier from the second integrated subscriber identity module in order to transmit second transmission data to the to obtain second cellular network, wherein the cellular communication interface is designed to read the second OFDM modulation parameter from the second integrated subscriber identity module and to transmit the second OFDM modulation parameter to the OFDM modulator, the OFDM modulator being designed, the second To modulate transmission data according to the second OFDM modulation parameter in order to obtain second OFDM transmission data, wherein the mobile radio communication interface is designed to transmit the second OFDM transmission data to the second mobile radio network.

Such a cellular communication device facilitates cellular communication via several cellular networks, since two integrated subscriber identity modules are used, which are assigned to the respective cellular network or are at home. Due to the network-dependent modulation of the data by the OFDM modulator, an assignment of measurement data to the respective first or second mobile radio network is determined by the corresponding OFDM modulation parameters. In this way, data received in the network can easily be assigned to a corresponding target network or a corresponding network slice, which simplifies cellular communication and the evaluation of the data in the network.

In an exemplary embodiment of the mobile radio communication device, the first OFDM modulation parameter specifies first OFDM frequencies, and the second OFDM modulation parameter specifies second OFDM frequencies, the first OFDM frequencies differing from the second OFDM frequencies.

This offers the technical advantage that the cellular communication interface modulates the first data differently than the second data, so that it is easy to distinguish in the network whether the modulated data is intended for the first cellular network or the second cellular network. For example, it is possible to send with the second OFDM frequencies if the radio link guarantees a better transmission quality for these second OFDM frequencies than for the first OFDM frequencies. Which OFDM frequencies can best be used for transmission to which mobile radio network can be predefined, for example, resulting from a training phase in which the quality of the radio links to the respective mobile radio networks is determined depending on the transmission frequency range.

In an exemplary embodiment of the mobile radio communication device, the first OFDM frequencies are arranged in a first frequency range and the second OFDM frequencies are arranged in a second frequency range, the first frequency range having lower frequencies than the second frequency range.

This offers the technical advantage that the mobile radio communication interface transmits the first data in a lower frequency range than the second data, so it can only be recognized on the basis of the frequency range in the network whether it is the first data from the first iSIM 150 or the second data of the second iSIM 160 is.

In an exemplary embodiment of the mobile radio communication device, the OFDM modulator is also designed to map the first data and the second data onto quadrature amplitude modulation, QAM, signal constellation points before the OFDM modulation.

This offers the technical advantage that the mobile radio communication interface can transmit the first OFDM transmission data and the second OFDM transmission data in different frequency bands or frequency sub-bands to the first and the second mobile radio network. The first cellular network can expect the first OFDM transmission data within a known frequency band and thus does not need to set its receivers to receive over an entire frequency band, but can set the receivers to receive over a partial frequency band in a more resource-saving manner. The same applies to the second cellular network.

The QAM can be, for example, signal constellation points of, for example, 4, 16, 32, 64, 256 or higher in order to carry out a 4QAM, 16QAM, 32QAM, 64QAM, 256QAM or higher-grade QAM. The signal constellation points can be represented by points in the constellation diagram of the corresponding QAM. Depending on the choice of QAM, a different amount of data can be distributed to the individual OFDM frequency bands. With a good signal-to-noise ratio in one OFDM frequency sub-band, a higher-grade QAM, e.g. 256QAM or higher, can be used and with a poor signal-to-noise ratio in another OFDM frequency sub-band, a QAM with a lower degree can be used Example 16QAM or 4QAM can be used. This allows the transmission data to be optimally distributed over the individual OFDM frequency bands.

In an exemplary embodiment of the mobile radio communication device, the mobile radio communication interface is designed to send the first OFDM transmission data to a first network address of the first mobile radio network stored in the first data memory, and the second OFDM transmission data to a second network address stored in the second data memory of the second cellular network.

This offers the technical advantage that the mobile radio communication device can make the OFDM transmission data of the first subscriber identity module available to the first mobile radio network in a simple manner. Furthermore, the mobile radio communication device can make the OFDM transmission data of the second subscriber identity module available to the second mobile radio network in a simple manner. It goes without saying that this also applies to multiple subscriber identity modules, that is to say iSIMs.

In an exemplary embodiment, the mobile radio communication device has a first sensor, which is designed to detect a first value of a first physical variable and to store the first value as the first data in the first data memory, and a second sensor, which is designed to acquire a second value of a second physical quantity and to store the second value as the second data in the second data memory, the first physical quantity and the second physical quantity being different.

This offers the technical advantage that the mobile radio communication device can store sensor data and transmit them to the respective mobile radio network. The mobile radio communication device can thus be implemented as a loT device, for example, which records sensor data and makes it available to the network.

In an exemplary embodiment of the mobile radio communication device, the first data memory is designed to delete the first data from the first data memory after the first data has been read out by the communication interface, and the second data memory is designed to delete the second data after the second data has been read out delete the communication interface from the second data memory.

This offers the technical advantage that the recording time for the sensor data increases if the memory is deleted again after each transmission, so that no unnecessary data that has already been transmitted is stored in the respective data memory.

In an exemplary embodiment of the mobile radio communication device, the communication interface is designed to activate the respective integrated subscriber identity module in order to transmit the respective OFDM transmission data and to deactivate the respective integrated subscriber identity module after the respective data has been transmitted.

This offers the technical advantage that the respective integrated subscriber identity modules or iSIM modules are only active for a short time in order to send out their corresponding OFDM transmission data and are then switched to inactive again. This saves electricity and increases the standby time of the respective subscriber identity module. This is particularly important if the mobile radio communication device is a loT device, but it can also be an advantage in the case of conventional smartphones or mobile phones to increase the battery life.

In an exemplary embodiment of the cellular communication device, the first cellular network is a first subnetwork or a first network slice of a 5G cellular network, and the second cellular network is a second subnetwork or a second network slice of the 5G cellular network, which is a cellular communication device a loT communication device, wherein the first mobile subscriber identifier is stored in the first integrated subscriber identity module using a first public cryptographic key in cryptographically encrypted form, and wherein the second mobile subscriber identifier is stored in the second integrated subscriber identity module using a second public cryptographic key Key is stored cryptographically encrypted, wherein the first public cryptographic key is assigned to the first cellular network, and wherein the second public cryptographic key is assigned to the second cellular network.

This offers the technical advantage that the respective integrated subscriber identity modules or iSIM modules can be used in 5G communication networks, in particular network slices, in order to transmit data. The advantages of the 5G system architecture can thus be exploited, i.e. the virtual network architecture on a common physical infrastructure, the specific adaptation to the requirements of applications, services, devices, customers or operators, the support of logical network functions, the application-specific assignment of functions such as speed , Capacity, connectivity and network coverage to meet the special requirements of each application, the sharing of functional components across different network slices, etc.

The mobile radio communication device thus supports the three different service categories as provided in the 5G network, i.e. Enhanced Mobile Broadband (eMBB), massive machine type communication, mMTC or loT, as well as ultra-reliable communication with low latency (UR- LLC).

According to a second aspect, the invention relates to a method for wireless communication over a first cellular network and over a second cellular network, the first cellular network having a first network identification and the second cellular network having a second network identification, and for network-dependent OFDM data modulation over a cellular network. Communication interface of a cellular communication device, wherein the cellular Communication interface has a first integrated subscriber identity module, iSIM: Integrated Subscriber Identity, and a second integrated subscriber identity module, the first integrated subscriber identity module being implemented as an embedded integrated circuit and a first mobile subscriber identity and a first OFDM modulation parameter stores, wherein the second integrated subscriber identity module is implemented as an embedded integrated circuit and permanently stores a second cellular subscriber identifier and a second OFDM modulation parameter, the first cellular subscriber identifier identifying the first integrated subscriber identity module in the first cellular network, and wherein the second mobile radio subscriber identifier identifies the second integrated subscriber identity module in the second mobile radio network, the first OFDM modulation parameter indicating first OFDM modulation frequencies , the second OFDM modulation parameter indicating second OFDM modulation frequencies which differ from the first OFDM modulation frequencies, the mobile radio communication device having a first data memory which is set up to store first data for forwarding to the first mobile radio network and a second Having a data memory which is designed to store second data for forwarding to the second mobile radio network, and wherein the mobile radio communication interface furthermore has an OFDM modulator for executing an OFDM modulation scheme, the method having the following steps: reading out the first data the first data memory and the first mobile radio subscriber identifier from the first integrated subscriber identity module by means of the mobile radio communication interface in order to receive first transmission data for transmission to the first mobile radio network; Reading out the first OFDM modulation parameter from the first integrated subscriber identity module and transmitting the first OFDM modulation parameter to the OFDM modulator by means of the mobile radio communication interface; Modulating the first transmission data in accordance with the first OFDM modulation parameter by means of the OFDM modulator in order to obtain first OFDM transmission data; Sending the first OFDM transmission data to the first cellular network by means of the cellular communication interface; and / or reading out the second data from the second data memory and the second mobile radio subscriber identifier from the second integrated subscriber identity module by means of the mobile radio communication interface in order to receive second transmission data for transmission to the second mobile radio network; Reading out the second OFDM modulation parameter from the second integrated subscriber identity module and transmitting the second OFDM modulation parameter to the OFDM modulator by means of the mobile radio communication interface; Modulating the second transmission data in accordance with the second OFDM modulation parameter by means of the OFDM modulator in order to obtain second OFDM transmission data; Sending the second OFDM transmission data to the second cellular network by means of the cellular communication interface.

Such a method facilitates mobile radio communication over several mobile radio networks, since two integrated subscriber identity modules are used which are assigned to the respective mobile radio network or are at home. Due to the network-dependent modulation of the data by the OFDM modulator, an assignment of measurement data to the respective first or second mobile radio network is determined by the corresponding OFDM modulation parameters. In this way, data received in the network can be easily assigned to a corresponding target network or a corresponding network slice, which simplifies cellular communication and the evaluation of the data in the network.

• 1 eine schematische Darstellung eines Mobilfunkkommunikationssystems 100 gemäß einer beispielhaften Ausführungsform mit einem Mobilfunk-Kommunikationsgerät 130 mit zwei integrierten Teilnehmer-Identitätsmodulen 150, 160 und einer Mobilfunk-Kommunikationsschnittstelle 140 zur netzwerkabhängigen OFDM-Datenmodulation gemäß der Offenbarung;
• 2a ein Blockdiagramm eines beispielhaften OFDM-Modulators 170 in vereinfachter Darstellung;
• 2b ein beispielhaftes Frequenzdiagramm 210 eines OFDM-Modulators 170, bei dem die unteren Frequenzbänder 211 zur Übertragung der ersten OFDM-Daten an das erste Mobilfunknetzwerk genutzt werden;
• 2c ein beispielhaftes Frequenzdiagramm 220 eines OFDM-Modulators 170, bei dem die oberen Frequenzbänder 212 zur Übertragung der zweiten OFDM-Daten an das zweite Mobilfunknetzwerk genutzt werden;
• 3 eine schematische Darstellung eines Mobilfunk-Kommunikationsgeräts 130 gemäß der Offenbarung in einem 5G Kommunikationssystem 300 gemäß einer beispielhaften Ausführungsform entsprechend der Spezifikation 3GPP TS 23.501;
• 4 eine schematische Darstellung eines Mobilfunk-Kommunikationsgeräts 130 gemäß der Offenbarung in einem 5G Kommunikationssystem 400 mit zwei beispielhaften Netzwerk-Slices 410, 440 gemäß einer beispielhaften Ausführungsform; und
• 5 eine schematische Darstellung eines Verfahrens 500 zur Mobilfunk-Kommunikation mittels zwei integrierten Teilnehmer-Identitätsmodulen 150, 160 und netzwerkabhängiger OFDM-Datenmodulation mittels Mobilfunk-Kommunikationsschnittstelle 140 gemäß einer beispielhaften Ausführungsform.

Further exemplary embodiments are explained with reference to the accompanying drawings. Show it:

• 1 a schematic representation of a cellular radio communication system 100 according to an exemplary embodiment with a mobile radio communication device 130 with two integrated participant identity modules 150 , 160 and a cellular communication interface 140 for network-dependent OFDM data modulation according to the disclosure;
• 2a Figure 3 is a block diagram of an exemplary OFDM modulator 170 in a simplified representation;
• 2 B an exemplary frequency diagram 210 an OFDM modulator 170 , in which the lower frequency bands 211 used to transmit the first OFDM data to the first cellular network;
• 2c an exemplary frequency diagram 220 an OFDM modulator 170 , in which the upper frequency bands 212 used to transmit the second OFDM data to the second cellular network;
• 3 a schematic representation of a mobile radio communication device 130 as disclosed in a 5G communication system 300 according to an exemplary embodiment according to specification 3GPP TS 23.501;
• 4th a schematic representation of a mobile radio communication device 130 as disclosed in a 5G Communication system 400 with two exemplary network slices 410 , 440 according to an exemplary embodiment; and
• 5 a schematic representation of a process 500 for cellular communication using two integrated subscriber identity modules 150 , 160 and network-dependent OFDM data modulation using a cellular communication interface 140 according to an exemplary embodiment.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which there is shown, by way of illustration, specific embodiments in which the invention may be practiced. It goes without saying that other embodiments can also be used and structural or logical changes can be made without deviating from the concept of the present invention. The following detailed description is therefore not to be taken in a limiting sense. Furthermore, it goes without saying that the features of the various exemplary embodiments described herein can be combined with one another, unless specifically stated otherwise.

The aspects and embodiments are described with reference to the drawings, wherein like reference characters generally refer to like elements. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects of the invention. However, it may be apparent to one skilled in the art that one or more aspects or embodiments can be practiced in a lesser degree of specific detail. In other instances, known structures and elements are shown in schematic form to facilitate describing one or more aspects or embodiments. It goes without saying that other embodiments can be used and structural or logical changes can be made without departing from the concept of the present invention.

In addition, although a particular feature or aspect of an embodiment may have been disclosed with respect to only one of several implementations, such a feature or aspect may be combined with one or more other features or aspects of the other implementations, as for a given or particular one Application can be desirable and beneficial. Furthermore, to the extent that the terms “including,” “having,” “having” or other variations thereof are used in either the detailed description or the claims, it is intended to include such terms in a manner similar to the term “comprising”. The terms “coupled” and “connected” together with derivatives thereof may have been used. It will be understood that such terms are used to indicate that two elements cooperate or interact with one another regardless of whether or not they are in direct physical or electrical contact with one another. In addition, the term “exemplary” should only be taken as an example instead of the designation for the best or the best. The following description is therefore not to be understood in a restrictive sense.

Network access entities, mobile radio communication devices and functions of such network access entities and mobile radio communication devices are described below. The network access entity ensures access and mobility management in the cellular network. Mobile radio communication devices can use the network access entity to register with their mobile radio subscriber identifier, for example UE ID or IMSI, in the mobile radio network and receive permission to set up a communication connection. For example, the network access entity in the 5G network can be an AMF (Access and Mobility Management Function) in order to provide access and mobility management functions. The AMF manages access and mobility control and can also include network slice selection functionality. In the 4G network, the network access entity can also be an MME (mobility management entity). This provides the functions of paging for the establishment of calls and general communication connections as well as signaling for control purposes. The network access entity connects the core network with the access network and manages the whereabouts of all mobile radio communication devices in the radio cells connected to it.

The network access entity also establishes a security relationship with a mobile radio communication device in order to then be able to install security elements, for example keys, in the mobile radio communication device and in the network application function (NAF) of the network access function, for example using the network protocols diameter and hypertext Transfer Protocol (http).

1 shows a schematic representation of a cellular radio communication system 100 according to an exemplary embodiment with a mobile radio communication device 130 with two integrated participant identity modules 150 , 160 and a cellular communication interface 140 to the network-dependent OFDM data modulation according to the disclosure.

The cellular communication system 100 comprises a first cellular network 110 and a second cellular network 120 as well as a cellular communication device 130 with two integrated subscriber identity modules (iSIM: Integrated Subscriber Identity) 150 , 160 and a communication interface 140 .

The first cellular network 110 is through a first network identification (ID1) 111 identified and can be addressed via its network address. For example, is in the first cellular network 110 a network access entity is available, which provides access to the first cellular network 110 regulates. The first cellular network 110 can then be addressed or reached via the network address of this network access entity. This network access entity knows the network identification 111 of the first cellular network 110 and can access the first cellular network 110 manage.

The second cellular network 120 is through a second network identification (ID2) 121 identified and can be identified by a second network address 122 be addressed. For example, it is in the second cellular network 120 a network access entity is available, which provides access to the second cellular network 120 regulates. The second cellular network 120 can then be addressed or reached via the network address of this network access entity. This network access entity knows the network identification 121 of the second cellular network 120 and can access the second cellular network 120 manage.

The network access entities for the first and second cellular networks 110 , 120 can be, for example, RAN (Radio Access Network) entities, such as base stations and radio access entities or AMF (Access and Mobility Management Function) in the 5G network.

The communication system 100 is only shown here as an example. It can also include further cellular networks, for example a third or further cellular networks that are similar to the first and second cellular networks 110 , 120 can be constructed. Furthermore, in addition to or instead of the first and second cellular networks 110 , 120 Networks with other radio access technologies can be implemented, for example WLAN or WiFi networks. Also other cellular communication devices 130 can be in the communication system 100 stop and communicate.

Also the cellular communication device 130 can in addition to the in 1 illustrated two integrated participant identity modules 150 , 160 comprise further such subscriber identity modules which provide access to further mobile radio networks. Of course, two or more subscriber identity modules can also be used in the mobile radio communication device 130 be available, which provide access to the same cellular network.

The cellular communication interface 140 for communication with the first cellular network 110 and the second cellular network 120 has a first integrated subscriber identity module (iSIM: Integrated Subscriber Identity) 150 and a second integrated subscriber identity module 160 on.

The first integrated participant identity module 150 is implemented as an embedded integrated circuit and stores a first mobile radio subscriber identifier 113 and a first QAM modulation parameter 115 firmly in the first integrated subscriber identity module 150 . The second integrated subscriber identity module 160 is implemented as an embedded integrated circuit and stores a second mobile radio subscriber identifier 123 and a second QAM modulation parameter 125 firmly in the second integrated subscriber identity module 160 .

The fixed storage means that the first mobile phone subscriber identification 113 and the first OFDM modulation parameter 115 even when the power supply is switched off in the first integrated subscriber identity module 150 are stored. For the second integrated subscriber identity module 160 the fixed storage means that the second mobile subscriber identification 123 and the second OFDM modulation parameter 125 even when the power supply is switched off in the second integrated subscriber identity module 160 are stored.

The first mobile phone subscriber ID 113 identifies the first integrated subscriber identity module 150 in the first cellular network 110 and the second mobile radio subscriber identification 123 identifies the second integrated subscriber identity module 160 in the second cellular network 120 .

The first OFDM modulation parameter indicates first OFDM modulation frequencies and the second OFDM modulation parameter indicates second OFDM modulation frequencies which differ from the first OFDM modulation frequencies.

The communication interface comprises an OFDM modulator for carrying out an OFDM modulation scheme.

OFDM transmission technology (Orthogonal Frequency-Division Multiplexing or Orthogonal Frequency-Division Multiplexing) is a modulation method that uses several orthogonal carriers for digital data transmission. This means that the maximum of a carrier lies at a zero crossing in each of its neighboring carriers. This reduces crosstalk between signals that are modulated onto neighboring carriers. The useful information to be transmitted with a high data rate is first divided into several partial data streams with a low data rate. These partial data streams are each modulated with a conventional modulation method such as QAM with a narrow bandwidth and then added. The modulated partial data streams can be added using an inverse Fourier transformation, for example in 2a shown. The advantage of OFDM is that it allows the data transmission to be easily adapted to the specifics of a transmission channel through fine granulation. If there is a narrow-band interference within the OFDM signal spectrum, the carriers affected by the interference can be excluded from the data transmission.

In QAM modulation, the carrier with angular frequency ω is used twice with a 90 ° phase shift. Two independent baseband signals are then modulated by means of multiplicative mixing. The two modulated signals are then added to obtain the transmission signal.

Die Kreisfrequenz ω steht für die Trägerfrequenz f.The transmission signal s (t) can be formed from the two baseband signals I (t) and Q (t) in the modulator using the following relationship: $$\text{s}\left(\text{t}\right)=\text{I.}\left(\text{t}\right)\text{cos}\left(\mathrm{\omega }\text{t}\right)-\text{Q}\left(\text{t}\right)\text{sin}\left(\mathrm{\omega }\text{t}\right).$$

The angular frequency ω stands for the carrier frequency f.

The two baseband signals I and Q in the bandpass position are always orthogonal to one another, which allows the symbols to be represented in the complex I / Q plane in the form of a constellation diagram. The number of available symbols representing points or areas in this complex plane is expressed in the form of a number. For example, a 64QAM has a number of 64 symbols. The QAM can form the modulation of the various sub-frequency carriers in the OFDM modulation, as for example in FIG 2a , 2 B and 2c shown. The modulator 202 in 2a can implement such a QAM.

The cellular communication device 130 has a first data memory 180 on which one is set up, first data 114 for forwarding to the first cellular network 110 save.

The cellular communication device 130 has a second data memory 190 on, which is formed, second data 124 for forwarding to the second cellular network 120 save.

The first mobile phone subscriber ID 113 is, for example, an identifier of the subscriber in the first cellular network 110 , for example an IMSI (International Mobile Subscriber Identity, that is, a number for the unique identification of network subscribers in the first cellular network 110 . The first mobile phone subscriber ID 113 can include parameters for identifying and authenticating the subscriber in the first cellular network 110 .

The second mobile radio subscriber identifier is analogous 123 for example an identifier of the subscriber in the second cellular network 120 , for example an IMSI (International Mobile Subscriber Identity, that is, a number for the unique identification of network subscribers in the second cellular network 120 . The second mobile phone subscriber ID 123 can include parameters for identifying and authenticating the subscriber in the second cellular network 120 .

The first dates 114 can use the first subscriber identity module 150 be assigned. For example, the first data 114 data that is no longer in the first subscriber identity module 150 can be stored and therefore in the first data memory 180 be outsourced. This can be, for example, measured values from the first subscriber identity module 150 were measured, for example recorded images or voice data, or temperature values, pressure values, level values, currents, voltage values, etc. The second data 124 the second subscriber identity module 160 be assigned. For example, the second data 114 data that are no longer in the second subscriber identity module 160 can be stored and therefore in the second data memory 190 be outsourced. This can be measured values, for example, as was already the case above for the first subscriber identity module 150 described, for example recorded images or voice data, or temperature values, pressure values, level values, currents, voltage values, etc.

The cellular communication interface 140 is for sending data to the first cellular network 110 formed and is also trained the first data 114 from the first data store 180 and the first mobile radio subscriber identification 113 from the first integrated subscriber identity module 150 read out to first send data 171a for transmission to the first cellular network 110 to obtain. The first data to be sent 171a are made by a combination 173 of the first dates 114 with the first mobile phone subscriber ID 113 obtain.

This combination 173 can for example be realized in that the first data 114 be provided with an index, which is the first mobile subscriber identifier 113 is equivalent to. The first dates 114 can also be sent as a payload in a data field with the first mobile subscriber identifier in its header or data header 113 is registered. The combination 173 can also include the addition of the first mobile radio subscriber identifier 113 to the first dates 114 or vice versa.

The cellular communication interface 140 is also designed, the first OFDM modulation parameter 115 from the first integrated subscriber identity module 150 read out and the first OFDM modulation parameter 115 to the OFDM modulator 170 to submit.

The OFDM modulator 170 is designed to send the first data 171a according to the first OFDM modulation parameter 115 according to the OFDM modulation scheme to modulate first OFDM transmission data 172a to obtain. The cellular communication interface 140 is designed to receive the first OFDM transmission data 172a to the first cellular network 110 to send out.

The cellular communication interface 140 is for sending data to the second cellular network 120 is formed and is also formed, the second data 124 from the second data memory 190 and the second mobile radio subscriber identification 123 from the second integrated subscriber identity module 160 read out to second send data 171b for transmission to the second cellular network 120 to obtain. The second send data 171b are made by a combination 174 the second data 124 with the second mobile phone subscriber ID 123 obtain.

This combination 174 can be implemented, for example, in that the second data 124 be provided with an index, which the second mobile subscriber identifier 123 is equivalent to. The second dates 124 can also be sent as a payload in a data field with the second mobile subscriber identifier in its header or data header 123 is registered. The combination 174 can also include the addition of the second mobile radio subscriber identifier 123 to the second data 124 or vice versa.

The cellular communication interface 140 is designed to use the second OFDM modulation parameter 125 from the second integrated subscriber identity module 160 read out and the second OFDM modulation parameter 125 to the OFDM modulator 170 to submit.

The OFDM modulator 170 is designed to send the second data 171b according to the second OFDM modulation parameter 125 according to the OFDM modulation scheme to modulate second OFDM transmission data 172b to obtain.

The cellular communication interface 140 is designed to receive the second OFDM transmission data 172b to the second cellular network 120 to send out.

The first cellular network 110 can be done using the first mobile phone subscriber ID 113 , for example UE ID or IMSI, the uploaded first data 114 the first iSIM 150 assign. The second cellular network 120 can use the second mobile phone subscriber ID 123 , for example UE ID or IMSI, the uploaded second data 124 the second iSIM 160 assign. This is useful when a huge amount of data, for example from a large number of loT devices, is uploaded to the network in order to identify which measurement data is currently coming from which device. In particular, it can happen that the first data 114 and the second data 124 asynchronously uploaded to the network. Then the first data is sent 114 together with the first mobile phone subscriber ID 113 and sending the second data 124 together with the second mobile subscriber identification 123 important to avoid confusing the first dates 114 or the second data 124 with other data currently being transferred to avoid.

The first OFDM modulation parameter 115 can specify first OFDM frequencies and the second OFDM modulation parameter 125 can specify second OFDM frequencies. The first OFDM frequencies can differ from the second OFDM frequencies.

The first OFDM frequencies can be arranged, for example, in a first frequency range and the second OFDM frequencies can be arranged, for example, in a second frequency range, the first frequency range having lower frequencies than the second frequency range. Alternatively, the first frequency range can have higher frequencies than the second frequency range.

The OFDM modulator 170 can also be designed to include the first data 114 and the second data 124 map to quadrature amplitude modulation, QAM, signal constellation points before OFDM modulation. For example on 4QAM, 16QAM, etc. The numbers 4, 16, etc. each denote the number of modulation points, i.e. the points in the constellation diagram.

The cellular communication interface 140 can be configured to use the first OFDM transmission data 172a to one in the first data store 180 stored first network address of the first cellular network 110 to be sent out, and the second OFDM send data 172b to one in the second data memory 190 stored second network address of the second cellular network 120 to send out.

The cellular communication device 130 may further comprise a first sensor which is designed to detect a first value of a first physical variable and the first value as the first data 114 in the first data store 180 save.

The cellular communication device 130 may comprise a second sensor which is designed to detect a second value of a second physical variable and the second value as the second data 124 in the second data memory 190 save.

The first physical variable and the second physical variable can be different. Alternatively, the first physical variable and the second physical variable can be the same, for example in the case of a redundant measurement by the first integrated subscriber identity module 150 and the second integrated subscriber identity module 160 .

The cellular communication device 130 can furthermore comprise a first actuator or an interface to a first actuator which is designed to provide a control command for controlling the first actuator from the first data 114 in the first data store 180 derive or read out and forward to the first actuator or the interface to the first actuator in order to move the first actuator accordingly.

The cellular communication device 130 can furthermore comprise a second actuator or an interface to a second actuator which is designed to provide a control command for controlling the second actuator from the second data 124 in the second data memory 190 derive or read out and forward to the second actuator or the interface to the second actuator in order to move the second actuator accordingly.

The first and the second actuator can be a machine component, which by the first 114 or second data 124 can be controlled. The actuators can be household appliances, for example, which are the first in the automated house or home 114 or second data 124 can be controlled. Alternatively, the first and the second actuator can, for example, loudspeakers or vibration devices of the mobile radio communication device 130 be which about the appropriate first 114 or second data 124 can be controlled and activated.

The first data store 180 can be designed the first data 114 after reading out the first data 114 through the communication interface 140 from the first data store 180 to delete.

The second data store 190 can be configured to include the second data 124 after reading out the second data 124 through the communication interface 140 from the second data memory 190 to delete.

The communication interface 140 can be designed to provide a power supply for the first integrated subscriber identity module 150 interrupt to the first integrated subscriber identity module 150 to deactivate, and a power supply for the second integrated subscriber identity module 160 to interrupt to the second integrated subscriber identity module 160 to deactivate. The communication interface 140 can have an integrated voltage source which is designed to provide the respective voltage supply.

The communication interface 140 can be designed, the respective integrated subscriber identity module 150 , 160 to activate to the respective OFDM transmit data 172a , 172b send out, and the respective integrated subscriber identity module 150 , 160 after sending the respective OFDM send data 172a , 172b to deactivate.

The communication interface 140 can be designed, the first integrated subscriber identity module 150 to connect to a power supply to the first integrated subscriber identity module 150 to activate, and the second integrated subscriber identity module 160 to connect to a power supply to the second integrated subscriber identity module 160 to activate.

The cellular communication device 130 can have a controllable switch, which through the communication interface 140 is controllable. The controllable switch can be designed to supply the voltage from the first integrated subscriber identity module 150 to separate and at the same time the second integrated participant identity module 160 to connect to the power supply, or the power supply from the second integrated subscriber identity module 160 to separate and at the same time the first integrated participant identity module 150 to be connected to the power supply.

The first cellular network 110 can be, for example, a first subnetwork or slice of a 5G cellular network. The second cellular network 120 can be a second subnetwork or slice of the 5G cellular network, for example below for the 3 and 4th described in more detail.

The cellular communication device 130 can be, for example, a loT (Internet of Things) communication device.

The first mobile phone subscriber ID 113 can in the first integrated subscriber identity module 150 stored cryptographically encrypted using a first public cryptographic key. The second mobile phone subscriber ID 123 can in the second integrated subscriber identity module 160 stored cryptographically encrypted using a second public cryptographic key. The first public cryptographic key can be transferred to the first cellular network 110 be assigned, and the second public cryptographic key can be assigned to the second cellular network 120 be assigned.

2a Figure 3 shows a block diagram of an exemplary OFDM modulator 170 , as in 1 used, in a simplified representation. The input signal 201 , which, for example, the first and second transmission data 171a , 171b in 1 corresponds to, becomes a modulator 202 fed, which can be, for example, a QAM modulator or a BPSK modulator. The modulator output signal 203 an IFFT (Inverse Fourier Transformation) 204 subjected and thus transformed into the time domain. The output signal 205 the IFFT 204 will eventually go from digital to analog (D / A) 206 converted to the analog output signal 207 to generate, which represents the OFDM modulation signal, so for example the first and second OFDM transmission data 172a , 172b in 1 .

The OFDM modulator 170 implements a digital multicarrier modulation method with the following properties: Instead of a broadband, strongly modulated signal, a large number of narrowband, mutually orthogonal subcarriers are used for data transmission. Among other things, this enables adaptation to a frequency-selective channel. In OFDM, the subcarriers themselves are usually modulated by conventional quadrature amplitude modulation (QAM) or by binary phase modulation (BPSK), it being possible for the individual carriers to differ with regard to the type of modulation. Differences in the degree of modulation lead to different high data rates of the subcarriers. This means that a source signal with a high data rate is split into several signals with a significantly lower symbol rate for transmission.

2 B shows an exemplary frequency diagram of an OFDM modulator 170 , as in 1 used in which the lower frequency bands 211 for the transmission of the first OFDM transmission data 172a to the first cellular network 110 be used.

In the frequency diagram are the lower frequency bands 211 shown with a thick line, which is used to transmit the first OFDM transmission data 172a be used. The upper frequency bands 212 are not used to transmit the first OFDM transmit data 172a utilized. The carriers are orthogonal to one another, which means that the maximum of a carrier lies at a zero crossing in each of its neighboring carriers. This reduces crosstalk between the signals which are modulated onto neighboring carriers. In the receiver in the network, the carrier can be used to immediately recognize that the data from the first iSIM 150 originate as the OFDM transmit data 172a on the lower frequency carriers 211 are modulated and the upper frequency carrier 212 contain no signals. This enables the first OFDM transmission data 172a be sent as a broadcast into the network without being in the cellular communication device 130 it must be ensured that the transmission data of the first iSIM 150 only to the first cellular network 110 and the transmission data of the second iSIM 160 only to the second cellular network 120 transferred to. The network can use the information that the first OFDM transmission data 172a are sent in the lower frequency bands, the correct assignment to the first iSIM 150 make.

2c shows an exemplary frequency diagram of an OFDM modulator 170 , as in 1 used in which the upper frequency bands 212 for the transmission of the second OFDM transmission data 172b to the second cellular network 120 be used.

In the frequency diagram are the upper frequency bands 212 shown with a thick line, which for the transmission of the second OFDM transmission data 172b be used. The lower frequency bands 211 are not used to transmit the second OFDM transmit data 172b utilized. The carriers are orthogonal to one another, which means that the maximum of a carrier lies at a zero crossing in each of its neighboring carriers. This reduces crosstalk between the signals which are modulated onto neighboring carriers. In the recipient in the network, the carrier can be used to immediately recognize that the data from the second iSIM 160 originate as the OFDM transmit data 172b on the upper frequency carriers 212 are modulated and the lower frequency carriers 211 contain no signals. This enables the second OFDM transmission data 172b be sent as a broadcast into the network without being in the cellular communication device 130 it must be ensured that the send data of the second iSIM 160 only to the second cellular network 120 and the transmission data of the first iSIM 150 only to the first cellular network 110 transferred to. The network can be based on the information that the second OFDM transmit data 172b are sent in the upper frequency bands, the correct assignment to the second iSIM 160 make.

If there are more than two iSIMs, it can be divided into more frequency ranges than the lower 211 and upper 212 Frequency range can be made, for example, the entire frequency range can be divided into several sub-ranges up to the order of magnitude of individual frequency bands. In each sub-area or each sub-frequency band, a specific iSIM then sends its transmission data either as a broadcast to the network or directed to the respective cellular network.

The difference between the first OFDM modulation parameter 115 and the second OFDM modulation parameter 125 can instead of the different frequency ranges 211 , 212 the OFDM carrier, for example, also in the number of QAM modulation points of two in the modulator 202 implemented QAM constellations. For example, a serial-parallel mapping of the input signal 201 corresponding to the first data signal 171a to a QAM constellation with a specific number of QAM modulation points, which are characteristic of the first iSIM 150 and a serial-parallel mapping of the input signal 201 corresponding to the second data signal 171b can be based on a QAM constellation with a specific number of QAM modulation points, which are characteristic of the second iSIM 160 is. Then the number of QAM modulation points within the OFDM modulator can be used 170 it can be recognized in the network whether the data to be transmitted is the first iSIM 150 or the second iSIM 160 acts.

Furthermore, the difference between the first OFDM modulation parameter 115 and the second OFDM modulation parameter 125 instead of the different frequency ranges 211 , 212 the OFDM carrier, for example, also through various characteristic phase shifts of the input signal 201 will be realized. For example, an input signal 201 according to the first send data 171a having a first predetermined phase shift during an input signal 201 according to the second transmission data 171b may have a second predetermined phase shift.

Combinations of the distinguishing features described above are also possible. That is, the first data to be sent 171a can be modulated in a predetermined first frequency carrier range with a predetermined first number of QAM modulation points and / or a predetermined first phase shift. The second send data can also 171b are modulated in a predetermined second frequency carrier range with a predetermined second number of QAM modulation points and / or a predetermined second phase shift. Of course, this also applies to more than two send data that originate from more than two iSIMs.

3 shows a schematic representation of a mobile radio communication device 130 as disclosed in a 5G communication system 300 according to an exemplary embodiment according to specification 3GPP TS 23.501. In 3 the various blocks that make up such a 5G communication system are shown schematically 300 includes.

The cellular communication device 130 corresponds to the user equipment (UE) or client terminal, which can be operated by the subscriber to initiate communication in the 5G network, i.e. to start (mobile originating, MO) or accept (mobile terminating, MT) communication. The cellular communication device 130 can initiate communication without user interaction, for example it can be a machine terminal, for example for a car, a machine, a robot or some other device.

The (R) AN ((Radio) Access Network) entity 331 represents the (radio) access network with which the mobile radio communication device 130 Gaining access to the 5G communication network. The interface between cellular communication devices 130 and (R) AN can be an air interface if it is the access network 331 is a radio network or can be wired if the access network 331 is a wired network.

The AMF (Access and Mobility Management Function) entity 340 represents the access and mobility management function. This is used to manage the access and mobility control. The AMF 340 may also include network slice selection functionality. With wireless access, mobility management is usually not required.

The SMF (Session Management Function) entity 341 represents the session management function. The SMF entity 341 sets up sessions and manages them in accordance with the network policy or network planning.

The UPF (User Plane Function) entity 332 represents the user plane function. Such user plane functions can be used in different configurations and locations, according to the type of service.

The PCF (Policy Control Function) entity 342 represents the policy (or planning) control function. The PCF entity 342 thus provides a policy framework that includes network slicing, roaming and mobility management. This corresponds to the functionality of a PCRF in 4G systems.

The UDM (Unified Data Management) entity 352 provides a common data management. With this data management, participant data and profiles are saved. This corresponds to the functionality of an HSS in 4G systems, but can be used for both mobile and wired access in the NG Core network.

The communication interface 140 can for example the first dates 114 to the UDM block 352 transfer. For example, measured values or measurement parameters can be sent by the mobile radio communication device 130 were recorded on the network 300 be filed.

The DN (Data Network) 333 provides the data network over which data is transmitted, for example from a mobile radio communication device 130 to another cellular communication device 130 or UE.

About the DN 333 can thus the first data 114 and / or the second data 124 from the cellular communication device 130 be transmitted to another mobile radio communication device or other UE.

The AUSF (Authentication Server Function) entity 351 provides authentication functionality with which the subscriber or the mobile radio communication device can communicate 130 can log in to the network. The first integrated participant identity module 150 can, for example, via the block EXEC 351 in the 5G network 300 authenticate. Also the second integrated participant identity module 160 can be accessed through the AUSF entity 351 in the 5G network 300 authenticate.

The AF (Application Function) entity 351 provides application functions with which certain services can be carried out, for example services provided by the first integrated subscriber identity module 150 or the second integrated subscriber identity module 160 put on or used.

The Network Slice Selection Function (NSSF) entity 350 provides functions for selecting specific network slices. For example, the first integrated subscriber identity module 150 a first slice in the 5G communication system 300 and select the second integrated subscriber identity module 160 can create a second slice in the 5G communication system 300 choose.

This in 3 5G communication system shown 300 corresponds to the 5G system architecture according to the specification 3GPP TS 23.501 and represents the structure of the NG (Next Generation) network, which consists of network functions (NFs) and reference points that connect the NFs. In the specification 3GPP TS 23.501, however, the end device is only generally referred to as UE (User Equipment) without the here in 3 Special embodiment shown with two integrated subscriber identity modules iSIM1 and iSIM2. The cellular communication device 130 or UE is either connected to a radio access network (RAN) 331 or an access network (AN) 331 tied together. In addition, the cellular communication device is 130 or UE with the access and mobility function (AMF) 340 tied together. The RAN 331 represents a base station that uses the new RAT (Radio Access Technology) and advanced LTE technologies, while the AN 331 represents a general base station with non-3GPP access, e.g. WiFi. The NextGeneration core network or the in 3 5G communication system shown 300 consists of various network functions (NFs). In 3 There are seven Next Generation Core NFs, namely (1) AMF 340 , (2) Session Management Function (SMF) 341 , (3) Policy Control Function (PCF) 342 , (4) Application function (AF) 343 , (5) Authentication server function (AUSF) 351 , (6) User level function (UPF) 332 and (7) User Data Management (UDM) 352 . The integrated participant identity modules 150 , 160 can select one or more network functions from these to initiate communication.

The network function (NF) represents the processing function taken over by 3GPP in NextGen or NG. It has both functional behavior and serves as an interface at the same time. An NF can either be implemented on dedicated hardware as a network element or run as a software instance on dedicated hardware or as a virtualized function instantiated on a suitable platform, e.g. B. be implemented in a cloud infrastructure.

The AMF 340 or AMF entity 340 offers UE-based authentication, authorization, mobility management, etc. A cellular communication device 130 is for example with a single AMF 340 connected as the AMF 340 is independent of the access technology. That is, also a cellular communication device 130 with multiple access technologies only needs to use a single AMF 340 be connected.

This AMF 340 forms, for example, a network entity with a first network identification 111 and first network address 112 as above too 2 described and is responsible for the messages or communication requests of the first integrated subscriber identity module 150 the cellular communication interface 140 to terminate or answer to a communication of the first integrated subscriber identity module 150 in the first cellular network 110 to initiate.

The AMF 340 can also send the messages or communication requests from the second integrated subscriber identity module 160 the cellular communication interface 140 process and to the second cellular network 120 forward, for example via the mechanisms as below 4th described to a communication of the second integrated subscriber identity module in the second cellular network 120 to initiate.

The SMF 341 or SMF entity 341 is responsible for the session management and assigns the cellular communication device 130 one or more IP addresses. In addition, the SMF votes 341 the UPF 332 and controls the UPF 332 regarding the data transfer, for example for the transfer of the first data 114 . When a cellular communication device 130 Having multiple sessions can have different SMFs 341 be assigned to each session in order to control them individually and possibly to provide several functionalities per session.

The AF 343 or AF entity 343 provides information about the packet flow and presents it to the PCF 342 who is responsible for policy control in order to ensure Quality of Service (QoS). Based on this information, PCF determines 342 the guidelines on mobility and session management so that the AMF 340 and the SMF 341 work properly.

The AUSF 351 or AUSF entity 351 stores data for the authentication of the mobile radio communication device 130 while the UDM 352 Subscription data or subscriber data of the mobile radio communication device 130 saves. The data network DN 333 , which is not part of the NG Core network 300 is responsible for Internet access and operator services.

The reference point representation of the architecture can be used to represent detailed message flows in the next generation (NG) standardization. The reference point N1 301 is defined as transmission signaling between the mobile radio communication device 130 and the AMF 340 . The reference points for the connection between the AN 331 and the AMF 340 and between the contractor 331 and the UPF 332 are as N2 302 or N3 303 Are defined. There is no reference point between the AN 331 and the SMF 341 , but there is a reference point, N11 311 , between the AMF 340 and the SMF 341 . This means that the SMF 341 from the AMF 340 is controlled. N4 304 is used by the SMF 341 and the UPF 332 used to make the UPF 332 with the generated control signal from the SMF 341 can be set, and the UPF 332 can report their status to the SMF 341 Report. N9 309 is the reference point for the connection between different UPFs 332 and N14 314 is the reference point between different AMFs 340 . N15 315 and N7 307 are defined so that the PCF 342 their guidelines on the AMF 340 or the SMF 341 can apply. N12 312 is required for the AMF 340 the authentication of the mobile radio communication device 130 can perform. N8, 308 and N10, 310 are defined because the subscription data of the cellular communication device 130 from the AMF 340 and the SMF 341 are needed.

The next generation network 300 aims to separate the user and control level. The user plane carries the user traffic while the control plane carries the signaling in the network. In 3 is the UPF 332 in the user level and all other network functions, i.e. AMF 340 , SMF 341 , PCF 342 , AF 343 , EXEC 351 and UDM 352 are located in the control level. The separation of the user and control level guarantees the independent scaling of the resources of each network level. The separation also allows UPFs to be provided 332 in a distributed manner separate from the functions of the control plane.

The NG architecture 300 consists of modularized functions. For example, the AMF 340 and the SMF 341 independent functions in the control level. Separate AMF 340 and SMF 341 allow independent development and scaling. Other control levels functions like the PCF 342 and the AUSF 351 can also be separated. This in 3 The modularized functional design shown enables the next generation network 300 also a flexible support of various services.

Each network function interacts directly with a different NF. In the control plane, a number of interactions between two NFs are defined as a service so that they can be reused. This service enables the support of modularity. The user level supports interactions such as forwarding operations between different UPFs 332 .

The next generation network 300 supports roaming, i.e. the ability of a cellular network subscriber to independently receive or make calls, send and receive data or have access to other cellular network services in a cellular network other than their home network. There are two types of application scenarios, on the one hand Home Routed (HR), on the other hand local breakout (LBO, “local breakout”).

4th shows a schematic representation of a mobile radio communication device 130 as disclosed in a 5G communication system 400 with two exemplary network slices 410 , 440 according to an exemplary embodiment.

In particular, the 5G communication network is 400 divided into a first network slice 440 , corresponding to the first cellular network 110 according to the 1 and 2 , and a second network slice 410 , corresponding to the second cellular network 120 according to the 1 and 2 . Both network slices 440 , 410 have the same structure as above too 3 generally described, although for the sake of clarity not all network elements are shown in detail. In particular, the first comprises network slice 440 an access and mobility management network element 451 which has the same functionality and interfaces as the above too 3 AMF entity described 340 having.

The first network slice 440 can also be a home network slice of the first integrated subscriber identity module 150 his and a visited network slice of the second integrated subscriber identity module 160 while the second network slice 410 a home network slice of the second integrated subscriber identity module 150 can be and a visited network slice of the first integrated subscriber identity module 150 .

The first network slice 440 is for example the network slice in which the first integrated subscriber identity module 150 or the user of this module 150 is registered, i.e. by signing a contract with the network operator.

The second network slice 410 is for example the network slice in which the second integrated subscriber identity module 160 or the user of this module 160 is registered, i.e. by signing a contract with the network operator. Usually this is the same user who has purchased two subscriber identity modules.

The first network slice 440 further comprises a session management network element 452 which has the same functionality and interfaces as the above too 3 described SMF entity 341 having. The first network slice 440 also includes a database 460 with the network elements authentication server 461 , Data manager 462 and policy control 463 which have the same functionality and interfaces as the above too 3 described network elements EXEC 351 , UDM 352 and PCF 342 exhibit.

The same network elements, with the same functionalities and interfaces, also comprise the second network slice 410 , that is, an access and mobility management network element 421 , a session management network element 422 and a database 430 with the network elements authentication server 431 , Data manager 432 and policy control 433 .

In the first network slice 440 is the network access entity 451 arranged, which serves to enable the establishment of the communication connection. The cellular communication device 130 is via the N1 interface 401 to the network access entity 451 tied up. The network access entity 451 is via various communication interfaces, as already in 3 described above, to individual network elements of the second network slice 410 and the first network slice 440 connected: Via the N1 interface 401 is the network access entity 451 with the communication device 130 tied together. Via an interface 406 is the network access entity 451 with the network access entity 421 of the second network slice 410 tied together.

Via the N1 interface 401 are the first OFDM transmit data 172a as above too 1 described, to the network access entity 451 of the first network slice 440 transfer. The transmission takes place according to the first OFDM modulation parameter 115 that this first OFDM modulation parameter 115 corresponding first frequency diagram 210 differs from the second frequency diagram 220 for transmission according to the second OFDM modulation parameter 125 , as in 4th shown.

The network access entity 451 of the first network slice 440 represents the communication interface 140 of the cellular communication device 130 In addition, all necessary data for network access is available via the N1 interface. The network access entity 451 can, for example, via the N8, N12, N15, N22 interfaces according to the in 3 described system architecture network capabilities of the first network slice 440 from the database 460 of the first network slice 440 query and you can also use the A1 interface 406 Participant data 406 of the cellular communication device 130 via the network access entity 421 from the second network slice 410 of the cellular communication device 130 Interrogate.

In the second network slice 410 is the network access entity 421 arranged, which serves to enable the establishment of the communication connection. The cellular communication device 130 is via the N1 interface 402 to the network access entity 421 tied up. The network access entity 421 is via various communication interfaces, as already in 3 described above, to individual network elements of the second network slice 410 : Via the N1 interface 402 is the network access entity 421 with the communication device 130 tied together.

Via an interface 406 is the network access entity 421 with the network access entity 451 of the first network slice 440 tied together.

Via the N1 interface 402 become the second OFDM transmit data 172b as above too 1 described, to the network access entity 421 of the second network slice 410 transfer. The transmission takes place according to the second OFDM modulation parameter 125 that this second OFDM modulation parameter 125 corresponding second frequency diagram 220 differs from the first frequency diagram 210 for transmission according to the first OFDM modulation parameter 115 , as in 4th shown. Alternatively or additionally, the second OFDM transmission data 172b also via the N1 interface 401 of the first network slice 440 and the interface 406 between the two network access entities 451 , 421 to the second network slice 410 be transmitted. The second OFDM transmit data 172b can be used when transmitting via the N1 interface 401 and the interface 406 also according to the second frequency diagram 220 be modulated.

The network access entity 451 of the first network slice 440 represents the communication interface 140 of the cellular communication device 130 in addition, all necessary data for network access via the N1 interface 401 to disposal. The network access entity 451 can, for example, via the N8, N12, N15, N22 interfaces according to the in 3 described system architecture network capabilities of the first network slice 440 from the database 460 of the first network slice 440 query and you can also use the interface 406 Subscriber data of the mobile radio communication device 130 via the network access entity 421 from the second network slice 410 of the cellular communication device 130 Interrogate.

The network access entity 451 of the first network slice 440 can through the interface 406 also subscriber data, network address of the second network slice 410 as well as the network identification 121 of the second network slice 410 from the network access entity 421 of the second network slice 410 query and the communication interface 140 of the cellular communication device 130 provide. Of course, the network access entity can 451 these queries are also sent directly to the database 430 of the second network slice 410 and from there directly, i.e. without going through the network access entity 421 , receive.

In detail, the method for setting up the communication connection via the network access entity 451 with the first integrated subscriber identity module 150 proceed as follows: In a first step, a registration request is made by the first integrated subscriber identity module 150 to the network access entity 451 of the first network slice 440 transfer. The registration request comprises the first mobile radio subscriber identification of the first integrated subscriber identity module 150 . The registration request is sent to the network access entity 451 via the N1 interface 401 transfer.

In a further step, the network access entity asks 451 then subscriber-specific registration data of the first integrated subscriber identity module 150 from the database 460 of the first network slice 440 or from an external database, based on the first mobile radio subscriber identifier of the first integrated subscriber identity module 150 .

The network identification of the first network slice 440 is then used by the AMF entity 451 of the first network slice 440 via the N1 interface 401 to the communication interface 140 of the cellular communication device 130 transfer.

Together with the network identification of the first network slice 440 or the network access data for the access of the first integrated subscriber identity module can then also be consecutive in time 150 to the first network slice 440 through the network access entity 451 to the first integrated subscriber identity module 150 via the communication interface N1 , 401 and the communication interface 140 of the cellular communication device 130 be transmitted. The network access data for access to the first integrated subscriber identity module 150 to the first network slice 440 are based, for example, on the subscriber-specific registration data of the first integrated subscriber identity module 150 , such as the first mobile subscriber identification of the first integrated subscriber identity module 150 or also further registration data of the first integrated subscriber identity module 150 , for example a name, a password, a network key, etc.

The network access data show the capabilities of the first network slice 440 , in particular those skills which are necessary for the first integrated subscriber identity module 150 are usable. Finally, the communication connection is established through the first integrated subscriber identity module 150 and the corresponding network elements of the first network slice 440 based on the network identification of the first network slice 440 , the mobile network subscriber ID 113 of the first participant identity module 150 and the network access data to the first network slice 440 built up.

The network access data can, for example, have the following capabilities of the first network slice 440 specify: number and type of further network slices, which are separated by the first network slice 440 can be allocated or to which the first network slice can establish a communication connection, support of specific network slice functions, the ability to transmit data and / or voice, support of 2G / 3G, 4G and / or 5G roaming, support of a specific Service through the first network slice 440 .

The registration request can also have an identification of a specific service according to which the first integrated subscriber identity module 150 at the first network slice 440 inquires. The specific service can be through the first network slice 440 based on the identification of the specific service, if the first network slice is provided 440 supports the specific service. Otherwise, i.e. if it does not support the specific service, the network access entity can 451 a network slice ID of another cellular network to the first integrated subscriber identity module 150 which supports the specific service. In this case, the network slice ID of a further network slice, which is represented by the first network slice 440 can be allocated or to which the first network slice 440 can establish a communication connection to the first integrated subscriber identity module 150 which supports the specific service.

The registration request can also contain a key for authenticating the first integrated subscriber identity module 150 include. The network access entity 451 can be the first integrated subscriber identity module 150 via an authentication entity 461 of the first network slice 440 authenticate based on the key. This can be done before the participant-specific registration data is queried.

In detail, the method for setting up the communication connection via the network access entity 451 with the second integrated subscriber identity module 160 proceed as follows: In a first step, a registration request is made by the second integrated subscriber identity module 160 to the network access entity 451 of the first network slice 440 transmitted, as above for establishing the communication connection with the first integrated subscriber identity module 150 described. The registration request includes the second mobile radio subscriber identifier 123 of the second integrated subscriber identity module 160 . The registration request is sent to the network access entity 451 via the N1 interface 401 transfer. Alternatively or additionally, the registration request from the second integrated subscriber identity module 160 to the network access entity 421 of the second network slice 410 be directed.

In a further step, the network access entity asks 451 of the first network slice 440 or the network access entity 421 of the second network slice 410 then subscriber-specific registration data of the second integrated subscriber identity module 160 from the database 430 of the second network slice 410 or from an external database, based on the second mobile radio subscriber identifier 123 of the second integrated subscriber identity module 160 .

The network identification of the second network slice 410 is then used by the AMF entity 421 of the second network slice 410 through the interface 406 to the AMF entity 451 of the first network slice 440 and from there on via the N1 interface 401 to the communication interface 140 of the cellular communication device 130 transfer. Alternatively, the network identification of the second network slice 410 directly from the AMF entity 421 of the second network slice 410 via the N1 interface 402 to the communication interface 140 of the cellular communication device 130 transfer.

The network access data for the access of the second integrated subscriber identity module 160 to the second network slice 410 are based, for example, on the subscriber-specific registration data of the second integrated subscriber identity module 160 , such as the second mobile radio subscriber identification of the second integrated subscriber identity module 160 or also further registration data of the second integrated subscriber identity module 160 , for example a name, a password, a network key, etc.

The network access data show the capabilities of the second network slice 410 on, in particular those skills which are necessary for the second integrated subscriber identity module 160 are usable. Finally, the communication connection is established through the second integrated subscriber identity module 160 and the corresponding network elements of the second network slice 410 based on the network identification of the second network slice 410 , the mobile network subscriber ID 123 of the second participant identity module 160 and the network access data to the second network slice 410 built up.

The network access data can, for example, have the following capabilities of the second network slice 410 specify: number and type of further network slices, which are separated by the second network slice 410 can be allocated or to which the second network slice can establish a communication connection, support of specific network slice functions, the ability to transmit data and / or voice, support of 2G / 3G, 4G and / or 5G roaming, support of a specific Service through the second network slice 410 .

The registration request can also have an identification of a specific service according to which the second integrated subscriber identity module 160 at the second network slice 410 inquires. The specific service can be through the second network slice 410 based on the identification of the specific service, if the second network slice 410 supports the specific service. Otherwise, i.e. if it does not support the specific service, the network access entity can 451 a network slice ID of another cellular network to the second integrated subscriber identity module 160 which supports the specific service. In this case it can also be the network slice ID of a further network slice, which is represented by the second network slice 410 can be allocated or to which the second network slice can set up a communication connection to the second integrated subscriber identity module 160 which supports the specific service.

The registration request can also contain a key for authenticating the second integrated subscriber identity module 160 include. The network access entity 451 can use the second integrated subscriber identity module 160 via an authentication entity 431 of the second network slice 410 authenticate based on the key. This can be done before the participant-specific registration data is queried.

5 shows a schematic representation of a method 500 for wireless communication via a first cellular network 110 and via a second cellular network 120 , the first cellular network 110 a first network identification 111 and wherein the second cellular network 120 a second network identification 121 has, as for example above to the 1 until 4th and for network-dependent OFDM modulation via a cellular communication interface 140 a cellular communication device 130 .

The cellular communication interface 140 has a first integrated subscriber identity module, iSIM: Integrated Subscriber Identity, 150 and a second integrated subscriber identity module 160 on. The first integrated participant identity module 140 is implemented as an embedded integrated circuit and stores a first mobile radio subscriber identifier 113 firmly together with the first network identification 111 , such as above for the 1 until 4th described.

The second integrated subscriber identity module 160 is implemented as an embedded integrated circuit and a second mobile radio subscriber identifier 123 firmly together with the second network identification 121 , such as above for the 1 until 4th described.

The first mobile phone subscriber ID 113 identifies the first integrated subscriber identity module 150 in the first cellular network 110 and the second mobile radio subscriber identification 123 identifies the second integrated subscriber identity module 160 in the second cellular network 120 , such as above for the 1 until 4th described.

The first OFDM modulation parameter indicates first OFDM modulation frequencies and the second OFDM modulation parameter indicates second OFDM modulation frequencies which differ from the first OFDM modulation frequencies.

The cellular communication device 130 has a first data memory 180 which is set up to store first data for forwarding to the first cellular network and a second data memory 190 , which is designed to store second data for forwarding to the second cellular network, such as above for the 1 until 4th described.

The cellular communication interface 140 has an OFDM modulator, as above for the 1 until 4th described.

• Auslesen 501 der ersten Daten 114 aus dem ersten Datenspeicher 180 und der ersten Mobilfunk-Teilnehmerkennung 113 aus dem ersten integrierten Teilnehmer-Identitätsmodul 150 mittels der Mobilfunk-Kommunikationsschnittstelle 140, um erste Sendedaten 171a zur Aussendung an das erste Mobilfunknetzwerk 110 zu erhalten;
• Auslesen 502 des ersten OFDM-Modulationsparameters 115 aus dem ersten integrierten Teilnehmer-Identitätsmodul 150 und Übermitteln des ersten OFDM-Modulationsparameters 115 an den OFDM-Modulator 170 mittels der Mobilfunk-Kommunikationsschnittstelle 140;
• Modulieren 503 der ersten Sendedaten 171a gemäß dem ersten OFDM-Modulationsparameter 115 mittels des OFDM-Modulators 170, um erste OFDM-Sendedaten 172a zu erhalten;
• Aussenden 504 der ersten OFDM-Sendedaten 172a an das erste Mobilfunknetzwerk 110 mittels der Mobilfunk-Kommunikationsschnittstelle 140; und/oder
• Auslesen 505 der zweiten Daten 124 aus dem zweiten Datenspeicher 190 und der zweiten Mobilfunk-Teilnehmerkennung 123 aus dem zweiten integrierten Teilnehmer-Identitätsmodul 160 mittels der Mobilfunk-Kommunikationsschnittstelle 140, um zweite Sendedaten 171b zur Aussendung an das zweite Mobilfunknetzwerk 120 zu erhalten;
• Auslesen 506 des zweiten OFDM-Modulationsparameters 125 aus dem zweiten integrierten Teilnehmer-Identitätsmodul 160 und Übermitteln des zweiten OFDM-Modulationsparameters 125 an den OFDM-Modulator 170 mittels der Mobilfunk-Kommunikationsschnittstelle 140;
• Modulieren 507 der zweiten Sendedaten 171b gemäß dem zweiten OFDM-Modulationsparameter 125 mittels des OFDM-Modulators 170, um zweite OFDM-Sendedaten 172b zu erhalten;
• Aussenden 508 der zweiten OFDM-Sendedaten 172b an das zweite Mobilfunknetzwerk 120 mittels der Mobilfunk-Kommunikationsschnittstelle 140.

The procedure 500 has the following steps:

• Reading out 501 of the first dates 114 from the first data store 180 and the first mobile radio subscriber identifier 113 from the first integrated subscriber identity module 150 by means of the cellular communication interface 140 to get the first send data 171a for transmission to the first cellular network 110 to obtain;
• Reading out 502 of the first OFDM modulation parameter 115 from the first integrated subscriber identity module 150 and transmitting the first OFDM modulation parameter 115 to the OFDM modulator 170 by means of the cellular communication interface 140 ;
• Modulate 503 of the first data to be sent 171a according to the first OFDM modulation parameter 115 by means of the OFDM modulator 170 to get the first OFDM transmit data 172a to obtain;
• Send out 504 of the first OFDM transmission data 172a to the first cellular network 110 by means of the cellular communication interface 140 ; and or
• Reading out 505 the second data 124 from the second data memory 190 and the second mobile radio subscriber identifier 123 from the second integrated subscriber identity module 160 by means of the cellular communication interface 140 to send second data 171b for transmission to the second cellular network 120 to obtain;
• Reading out 506 of the second OFDM modulation parameter 125 from the second integrated subscriber identity module 160 and transmitting the second OFDM modulation parameter 125 to the OFDM modulator 170 by means of the cellular communication interface 140 ;
• Modulate 507 the second send data 171b according to the second OFDM modulation parameter 125 by means of the OFDM modulator 170 to get second OFDM transmit data 172b to obtain;
• Send out 508 of the second OFDM transmission data 172b to the second cellular network 120 by means of the cellular communication interface 140 .

These steps correspond, for example, to the functionalities as above for the 1 until 4th described.

One aspect of the invention also comprises a computer program product that can be loaded directly into the internal memory of a digital computer and comprises software code sections with which to do this 5 described procedure 500 or those to the 1 until 4th can be performed while the product is running on a computer. The computer program product can be stored on a computer-compatible, non-transitory medium and comprise computer-readable program means which cause a computer to implement the method 500 or the network components of the 1 until 4th to implement or control the communication networks described.

The computer can be a PC, for example a PC on a computer network. The computer can be implemented as a chip, an ASIC, a microprocessor or a signal processor and in a computer network, for example in a communication network as in the 1 until 4th described, be arranged.

It goes without saying that the features of the various exemplary embodiments described herein can be combined with one another, unless specifically stated otherwise. As shown in the description and the drawings, individual elements that have been shown in connection need not be directly related to one another; Intermediate elements can be provided between the connected elements. Furthermore, it goes without saying that embodiments of the invention can be implemented in individual circuits, partially integrated circuits or completely integrated circuits or programming means. The term "for example" is meant as an example only, and not as the best or optimal. Certain embodiments have been illustrated and described herein, but it will be apparent to those skilled in the art that a variety of alternative and / or similar implementations can be made in lieu of the embodiments shown and described without departing from the concept of the present invention.

Claims (9)

Cellular communication device (130) for wireless communication via a first cellular network (110) and via a second cellular network (120), the first cellular network (110) having a first network identification (111) and the second cellular network (120) having a second network identification (121), with the following characteristics: a cellular communication interface (140) for communication with the first cellular network (110) and the second cellular network (120), the communication interface (140) having a first integrated subscriber identity module, iSIM: Integrated Subscriber Identity, (150) and a second integrated Subscriber identity module (160), the first integrated subscriber identity module (150) being implemented as an embedded integrated circuit and a first mobile radio subscriber identifier (113) with a first OFDM modulation parameter (115) of an orthogonal frequency multiplex method, OFDM, -Modulation schemes, the second integrated subscriber identity module (160) is implemented as an embedded integrated circuit and a second mobile radio subscriber identifier (123) with a second OFDM modulation parameter (125) of the OFDM modulation scheme, the first Mobile subscriber identification (113) the e rste integrated subscriber identity module (150) identified in the first cellular network (110), and wherein the second cellular subscriber identifier (123) identifies the second integrated subscriber identity module (160) in the second cellular network (120), wherein the first OFDM Modulation parameter indicates first OFDM modulation frequencies, the second OFDM modulation parameter indicating second OFDM modulation frequencies which differ from the first OFDM modulation frequencies, the mobile radio communication interface (140) also having an OFDM modulator (170) for performing the OFDM Having modulation schemes; a first data memory (180) which is set up to store first data (114) for forwarding to the first cellular network (110); a second data memory (190) which is designed to store second data (124) for forwarding to the second cellular network (120); wherein the mobile radio communication interface (140) is designed for data transmission to the first mobile radio network (110), and is also designed to transfer the first data (114) from the first data memory (180) and the first mobile radio subscriber identifier (113) from the first integrated subscriber identity module (150) to receive first transmission data (171a) for transmission to the first cellular network (110), the cellular communication interface (140) being designed to use the first OFDM modulation parameter (115) from the first integrated subscriber identity module (150) and to transmit the first OFDM modulation parameter (115) to the OFDM modulator (170), the OFDM modulator (170) being designed to transmit the first transmission data (171a) according to the first OFDM To modulate modulation parameters (115) in order to receive first OFDM transmission data (172a), wherein the mobile radio communication interface (140) is designed to transmit the first OFDM transmission data (172a) transmit to the first cellular network (110); and where the mobile radio communication interface (140) is designed for data transmission to the second mobile radio network (120), and is also designed to take the second data (124) from the second data memory (190) and the second mobile radio subscriber identifier (123) from the second integrated subscriber identity module (160) to receive second transmission data (171b) for transmission to the second cellular network (120), wherein the cellular communication interface (140) is designed, the second OFDM modulation parameter (125) from the second integrated Read out subscriber identity module (160) and transmit the second OFDM modulation parameter (125) to the OFDM modulator (170), the OFDM modulator (170) being designed to transmit the second transmission data (171b) according to the second OFDM modulation parameter (125) to modulate in order to obtain second OFDM transmission data (172b), wherein the mobile radio communication interface (140) is designed, the second OFDM transmission data (172b) to be sent to the second cellular network (120). Mobile radio communication device (130) according to one of the preceding claims, wherein the first OFDM frequencies are arranged in a first frequency range, wherein the second OFDM frequencies are arranged in a second frequency range, the first frequency range having frequencies lower than the second frequency range. Mobile radio communication device (130) according to one of the preceding claims, wherein the OFDM modulator (170) is further designed to convert the first data (114) and the second data (124) to quadrature amplitude modulation, QAM, before OFDM modulation. Map signal constellation points. Mobile radio communication device (130) according to one of the preceding claims, wherein the Mobile radio communication interface (140) is designed to send the first OFDM transmission data (172a) to a first network address of the first mobile radio network (110) stored in the first data memory (180), and the second OFDM transmission data (172b) to one in the to send out the second data memory (190) stored second network address of the second cellular network (120). Mobile radio communication device (130) according to one of the preceding claims, with a first sensor which is designed to detect a first value of a first physical variable and to store the first value as the first data (114) in the first data memory (180) , and with a second sensor which is designed to detect a second value of a second physical variable and to store the second value as the second data (124) in the second data memory (190), the first physical variable and the second physical Size are different. Mobile radio communication device (130) according to one of the preceding claims, wherein the first data memory (180) is designed to store the first data (114) after reading out the first data (114) by the communication interface (140) from the first data memory (180) to delete, and wherein the second data memory (190) is designed to delete the second data (124) after reading out the second data (124) through the communication interface (140) from the second data memory (190). Mobile radio communication device (130) according to one of the preceding claims, wherein the communication interface (140) is designed to activate the respective integrated subscriber identity module (150, 160) in order to transmit the respective OFDM transmission data (172a, 172b), and that deactivate the respective integrated subscriber identity module (150, 160) after sending the respective data. Mobile radio communication device (130) according to one of the preceding claims, wherein the first mobile radio network (110) is a first subnetwork (440) of a 5G mobile radio network (400), wherein the second mobile radio network (120) is a second subnetwork (410) of the 5G Mobile radio network (400), the mobile radio communication device (130) being a loT communication device, the first mobile radio subscriber identifier (113) being stored in cryptographically encrypted form in the first integrated subscriber identity module (150) using a first public cryptographic key , and wherein the second mobile radio subscriber identifier (123) is stored cryptographically encrypted in the second integrated subscriber identity module (160) using a second public cryptographic key, the first public cryptographic key being assigned to the first mobile radio network (110), and wherein the second public cryptographic key is assigned to the second cellular network (120). Method (500) for wireless communication via a first cellular network (110) and via a second cellular network (120), wherein the first cellular network (110) has a first network identification (111) and wherein the second cellular network (120) has a second network identification (121 ), and for network-dependent OFDM data modulation via a cellular communication interface (140) of a cellular communication device (130), the cellular communication interface (140) having a first integrated subscriber identity module, iSIM: Integrated Subscriber Identity, (150) and a second integrated subscriber identity module (160), the first integrated subscriber identity module (150) being implemented as an embedded integrated circuit and a first mobile radio subscriber identifier (113) and a first OFDM modulation parameter (115) of an OFDM modulation scheme permanently stores, with the second integrated participant identi ity module (160) is implemented as an embedded integrated circuit and permanently stores a second mobile subscriber identifier (123) and a second OFDM modulation parameter (125) of the OFDM modulation scheme, the first mobile subscriber identifier (113) being the first integrated subscriber. Identity module (150) in the first cellular network (110), and wherein the second cellular subscriber identifier (123) identifies the second integrated subscriber identity module (160) in the second cellular network (120), wherein the first OFDM modulation parameter is the first OFDM Indicates modulation frequencies, the second OFDM modulation parameter indicating second OFDM modulation frequencies which differ from the first OFDM modulation frequencies, the mobile radio communication device (130) having a first data memory (180) which is set up to forward first data to the first cellular network to store and a second data memory (190) which is designed to store second data for forwarding to the second mobile radio network, and wherein the mobile radio communication interface (140) furthermore has an OFDM modulator (170) for executing the OFDM scheme, the method ( 500) has the following steps: reading (501) the first data (114) from the first data memory (180) and the first mobile radio subscriber identifier (113) from the first integrated subscriber identity module (150) by means of the mobile radio communication interface (140 ) to first Receive transmission data (171a) for transmission to the first cellular network (110); Reading (502) the first OFDM modulation parameter (115) from the first integrated subscriber identity module (150) and transmitting the first OFDM modulation parameter (115) to the OFDM modulator (170) by means of the mobile radio communication interface (140); Modulating (503) the first transmission data (171a) in accordance with the first OFDM modulation parameter (115) by means of the OFDM modulator (170) in order to obtain first OFDM transmission data (172a); Sending (504) the first OFDM transmission data (172a) to the first mobile radio network (110) by means of the mobile radio communication interface (140); and / or reading (505) the second data (124) from the second data memory (190) and the second mobile radio subscriber identifier (123) from the second integrated subscriber identity module (160) by means of the mobile radio communication interface (140) to the second Receive transmission data (171b) for transmission to the second cellular network (120); Reading (506) the second OFDM modulation parameter (125) from the second integrated subscriber identity module (160) and transmitting the second OFDM modulation parameter (125) to the OFDM modulator (170) by means of the mobile radio communication interface (140); Modulating (507) the second transmission data (171b) in accordance with the second OFDM modulation parameter (125) by means of the OFDM modulator (170) in order to obtain second OFDM transmission data (172b); Sending (508) the second OFDM transmission data (172b) to the second mobile radio network (120) by means of the mobile radio communication interface (140).

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