CH716449A2 - Mobile radio communication device with two integrated subscriber identity modules and interface with network-dependent OFDM modulation. - Google Patents

Abstract

The invention relates to a mobile radio communication device (130) for wireless communication via a first mobile radio network (110) and via a second mobile radio network (120), the mobile radio communication device having a mobile radio communication interface (140) with a first integrated subscriber identity module, iSIM : Integrated Subscriber Identity (150), and a second integrated subscriber identity module (160) for communication with the first cellular network and the second cellular network. In the first iSIM, the first mobile radio subscriber identifier (113) and a first OFDM modulation parameter (115) are permanently stored, and in the second iSIM a second mobile radio subscriber identifier (123) and a second OFDM modulation parameter (125) are permanently stored. An OFDM modulator (170) of the communication interface is designed to modulate first transmission data (171a) according to the first OFDM modulation parameter in order to receive first OFDM transmission data (172a) for transmission to the first cellular network and to receive second transmission data (171b) (fMb ) to modulate according to the second OFDM modulation parameter in order to obtain second OFDM transmission data (172b) for transmission to the second cellular network.

Description

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 cellular radio 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 mobile communications 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. 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 allow users to have separate contact lists on each SIM card and make 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 his home network.

Devices with multiple SIM cards are also increasingly 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 let them work together through communication. Functions implemented with technologies of the "Internet of Things" allow interaction between humans and any electronic systems networked through them, as well as between the systems themselves. The aim of the Internet of Things is to automatically capture relevant information from the real world and to link it with one another For this purpose, communication networks based on the 5G system architecture are increasingly being used, as outlined, for example, in the specification 3GPP TS 23.501.

It is the object of the present invention to create a concept for a mobile radio communication, which allows the communication of human-to-human, human-to-machine and / or machine-to-machine over several mobile radio 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 in the following can comprise 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 special requirements of each application, but functional components can also be shared across different network slices. In addition, each network slice can be 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 mobile radio communication devices described below comprise a mobile radio communication interface or simply referred to as a communication interface, which performs a variety of tasks. Such a communication interface can include, for example, a processor that 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 can be a single processor or a multi-core processor or can contain a set of processors or can contain means for processing. A processor can handle software or firmware or applications etc.

According to a first aspect, the invention relates to a cellular communication device for wireless communication via a first cellular network and a second cellular network, wherein the first cellular network has a first network identification and wherein the second cellular network has 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 as an embedded integrated Circuit is implemented 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 ity module 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 which differ from the first OFDM modulation frequencies, the cellular communication interface also an OFDM modulator for carrying out 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 send first transmission data for transmission to the first cellular network received, wherein the mobile radio communication interface is 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, wherein the OFDM modulator is designed to transmit the first transmission data according to the first Modulating OFDM modulation parameters 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 mobile radio communication interface is designed for data transmission to the second mobile radio network, and is further designed to read out the second data from the second data memory and the second mobile radio subscriber identifier from the second integrated subscriber identity module in order to generate second transmission data for transmission to the second To obtain mobile radio network, wherein the mobile radio 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 to transmit the second transmission data in accordance with modulating the second OFDM modulation parameter in order to obtain second OFDM transmission data, the mobile radio communication interface being designed to transmit the second OFDM transmission data to the second mobile radio network.

Such a mobile radio communication device 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 parameter. In this way, data received in the network can be assigned in a simple manner to a corresponding target network or a corresponding network slice, which simplifies mobile radio 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 indicates first OFDM frequencies, and the second OFDM modulation parameter indicates 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 are 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 cellular 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 is the second data of the second iSIM 160.

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 to 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 mobile radio network can therefore 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 execute 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, for 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 one stored in the second data memory to send out the second network address of the second cellular network.

This offers the technical advantage that the mobile radio communication device can provide the OFDM transmission data of the first subscriber identity module in a simple manner to the first mobile radio network. 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 detect a second value of a second physical variable and to store the second value as the second data in the second data memory, the first physical variable and the second physical variable 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 after reading out the first data through the communication interface from the first data memory, and the second data memory is designed to delete the second data after reading out the to delete second data from the second data memory through the communication interface.

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 send out 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 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, the cellular communication device is a loT communication device, the first mobile subscriber identifier being stored in the first integrated subscriber identity module in cryptographically encrypted form using a first public cryptographic key, and the second mobile subscriber identifier being stored in the second integrated subscriber identity module using a second public cryptographic 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 el is assigned to the second cellular network.

This offers the technical advantage that the respective integrated subscriber identity modules or SIM 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 SG network, that is, Enhanced Mobile Broadband (eMBB), massive machine type communication, mMTC, or loT, and ultra-reliable communication with low latency (UR -LLC).

According to a second aspect, the invention relates to a method 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, and for network-dependent OFDM data modulation via one Mobile radio communication interface of a mobile radio communication device, the mobile radio communication interface having a first integrated subscriber identity module, iSIM: IntegratedSubscriber 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 radio subscriber identifier and a first OFDM modulation parameter permanently stores, the second integrated subscriber identity module as an embedded integrated circuit impl 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 the second cellular subscriber identifier identifying the second integrated subscriber identity module in the second cellular network identified, wherein the first OFDM modulation parameter indicates first OFDM modulation frequencies, wherein the second OFDM modulation parameter indicates second OFDM modulation frequencies which differ from the first OFDM modulation frequencies, wherein the mobile radio communication device has a first data memory which is set up to hold first data for forwarding to the first cellular network and has a second data memory which is designed to store second data for forwarding to the second cellular network, and wherein the cellular communication sc The interface also has an OFDM modulator for executing an OFDM modulation scheme, the method comprising the following steps: reading out the first data from 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 transmission data for transmission to the first cellular 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 cellular 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 obtain 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 parameter. In this way, data received in the network can be easily transferred to a corresponding target network

or assigned to a corresponding network slice, which simplifies cellular communication and the evaluation of the data in the network.

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

1 shows a schematic illustration of a mobile radio communication system 100 according to an example

embodiment with a mobile radio communication device 130 with two integrated subscriber identity modules 150, 160 and a mobile radio communication interface 140 for network-dependent OFDM data modulation according to the disclosure;

2a shows a block diagram of an exemplary OFDM modulator 170 in a simplified representation;

FIG. 2b shows an exemplary frequency diagram 210 of an OFDM modulator 170 in which the lower Fre

frequency bands 211 are used to transmit the first OFDM data to the first cellular network;

2c shows an exemplary frequency diagram 220 of an OFDM modulator 170 in which the upper Fre

frequency bands 212 are used to transmit the second OFDM data to the second cellular network;

3 shows a schematic illustration of a mobile radio communication device 130 according to the disclosure

tion in a 5G communication system 300 according to an exemplary embodiment in accordance with the specification 3GPP TS 23.501;

4 shows a schematic illustration of a mobile radio communication device 130 according to the disclosure

in a 5G communication system 400 with two exemplary network slices 410, 440 according to an exemplary embodiment; and

5 shows a schematic illustration of a method 500 for mobile radio communication by means of two internal

integrated subscriber identity modules 150, 160 and network-dependent OFDM data modulation by means of mobile radio 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, while 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 can be combined with one or more other features or aspects of the other implementations, as for one given or particular application may be desirable and advantageous. Furthermore, to the extent that the terms "include," "have," "having" or other variations thereof are used in either the detailed description or the claims, such terms are intended to be inclusive of in a manner similar to the term "comprise". The terms "coupled" and "connected" along 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" is to be construed as merely an example rather than the designation for the best or optimal. The following description is therefore not to be taken in a limiting sense.

In the following, network access entities, mobile radio communication devices and functions of such network access entities and mobile radio communication devices are described. The network access entity provides the

Secure 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 identification, 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 may 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 setting up calls and generally communication connections as well as signaling for control purposes. The network access entity connects the core network to 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 via the network protocols Diameter and Hypertext Transfer Protocol (http).

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

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

The first mobile radio network 110 is identified by a first network identification (ID1) 111 and can be addressed via its network address. For example, there is a network access entity in the first cellular network 110 which regulates the access to the first cellular network 110. The first mobile radio 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 manage access to the first cellular network 110.

The second cellular network 120 is identified by a second network identification (ID2) 121 and can be addressed by a second network address 122. For example, there is a network access entity in the second cellular network 120 which regulates access to the second cellular network 120. The second mobile radio 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 manage access to the second cellular network 120.

The network access entities for the first and second mobile radio networks 110, 120 can for example be 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 shown here only as an example. It can also include further cellular networks, for example a third or further cellular networks, which can be constructed similarly to the first and second cellular networks 110, 120. Furthermore, networks with other radio access technologies can also be implemented in addition to or instead of the first and second mobile radio networks 110, 120, for example WLAN or WiFi networks. Further mobile radio communication devices 130 can also reside and communicate in the communication system 100.

In addition to the two integrated subscriber identity modules 150, 160 shown in FIG. 1, the mobile radio communication device 130 can also include other such subscriber identity modules which create access to further mobile radio networks. Of course, two or more subscriber identity modules can also be present in the mobile radio communication device 130, which provide access to the same mobile radio network.

The mobile radio communication interface 140 for communication with the first mobile radio network 110 and the second mobile radio network 120 has 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 is implemented as an embedded integrated circuit and stores a first cellular subscriber identifier 113 and a first QAM modulation parameter 115 fixed in the first integrated subscriber identity module 150. The second integrated subscriber identity module 160 is as an embedded Integrated circuit implements and stores a second mobile radio subscriber identifier 123 and a second QAM modulation parameter 125 permanently in the second integrated subscriber identity module 160.

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

the second mobile radio subscriber identifier 123 and the second OFDM modulation parameter 125 are stored in the second integrated subscriber identity module 160 even when the power supply is switched off.

The first mobile radio subscriber identifier 113 identifies the first integrated subscriber identity module 150 in the first mobile radio network 110 and the second mobile radio subscriber identifier 123 identifies the second integrated subscriber identity module 160 in the second mobile radio 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 which 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, as shown, for example, in FIG. 2a. 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 narrowband interference occurs within the OFDM signal spectrum, carriers affected by the interference can be excluded from data transmission.

In QAM modulation, the carrier with angular frequency ra 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.

The transmission signal s (t) can be formed in the modulator by the following relationship from the two baseband signals I (t) and Q (t):

s (t) = l (t) cos (cot) - Q (t) sin (red).

The angular frequency w stands for the carrier frequency f.

The two baseband signals / 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 shown for example in FIGS. 2a, 2b and 2c. The modulator 202 in Figure 2a can implement such a QAM.

The mobile radio communication device 130 has a first data memory 180 which is set up to store first data 114 for forwarding to the first mobile radio network 110.

The mobile radio communication device 130 has a second data memory 190 which is designed to store second data 124 for forwarding to the second mobile radio network 120.

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

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

The first data 114 can be assigned to the first subscriber identity module 150. For example, the first data 114 can be data that can no longer be stored in the first subscriber identity module 150 and are therefore swapped out to the first data memory 180. This can be, for example, measured values that were measured by the first subscriber identity module 150, for example recorded images or voice data, or temperature values, pressure values, level values, currents, voltage values, etc. The second data 124 can also be sent to the second subscriber identity module 160 must be assigned. For example, the second data 114 can be data that can no longer be stored in the second subscriber identity module 160 and are therefore swapped out to the second data memory 190. This can be, for example, measured values, as already described above for the first subscriber identity module 150, for example recorded image or voice data, or temperature values, pressure values, level values, currents, voltage values, etc.

The mobile radio communication interface 140 is designed for data transmission to the first mobile radio network 110 and is also designed to read 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 in order to first To receive transmission data 171a for transmission to the first cellular network 110. The first transmission data 171a are obtained by a combination 173 of the first data 114 with the first mobile radio subscriber identifier 113.

This combination 173 can be implemented, for example, in that the first data 114 is provided with an index which corresponds to the first mobile radio subscriber identifier 113. The first data 114 can also be sent as a payload in a data field in whose header or data header the first mobile radio subscriber identifier 113 is entered. The combination 173 can also implement an appending of the first mobile radio subscriber identifier 113 to the first data 114 or vice versa.

The mobile radio communication interface 140 is also designed to read out 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 is designed to modulate the first transmission data 171a in accordance with the first OFDM modulation parameter 115 in accordance with the OFDM modulation scheme in order to obtain first OFDM transmission data 172a. The mobile radio communication interface 140 is designed, the first OFDM Send out transmission data 172a to the first cellular network 110.

The mobile radio communication interface 140 is designed for data transmission to the second mobile radio network 120 and is also designed to read 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 in order to to receive second transmission data 171b for transmission to the second cellular network 120. The second transmission data 171b is obtained by a combination 174 of the second data 124 with the second mobile radio subscriber identifier 123.

This combination 174 can be implemented, for example, in that the second data 124 is provided with an index which corresponds to the second mobile radio subscriber identifier 123. The second data 124 can also be sent as a payload in a data field in whose header or data header the second mobile radio subscriber identifier 123 is entered. 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 mobile radio communication interface 140 is designed to read the second OFDM modulation parameter 125 from the second integrated subscriber identity module 160 and to transmit the second OFDM modulation parameter 125 to the OFDM modulator 170.

The OFDM modulator 170 is designed to modulate the second transmission data 171b in accordance with the second OFDM modulation parameter 125 in accordance with the OFDM modulation scheme in order to obtain second OFDM transmission data 172b.

The mobile radio communication interface 140 is designed to transmit the second OFDM transmission data 172b to the second mobile radio network 120.

The first mobile radio network 110 can assign the uploaded first data 114 to the first iSIM 150 via the first mobile radio subscriber identifier 113, for example UE ID or IMSI. The second mobile radio network 120 can use the second mobile radio subscriber identifier 123, for example UE ID or IMSI, to upload the second data

124 to the second iSIM 160. This is useful when a huge amount of data, e.g. from a large number of loT devices, is uploaded to the network in order to identify which measurement data is coming from which device. In particular, it can happen that the first data 114 and the second Data 124 are uploaded to the network asynchronously in terms of time. It is then important to send the first data 114 together with the first mobile radio subscriber identifier 113 and to send the second data 124 together with the second mobile radio subscriber identifier 123 in order to avoid confusing the first data 114 or the second data 124 with other data currently being transmitted .

The first OFDM modulation parameter 115 can indicate first OFDM frequencies and the second OFDM modulation parameter 125 can indicate 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 further be designed to map the first data 114 and the second data 124 to quadrature amplitude modulation, QAM, signal constellation points before the OFDM modulation. For example to 4QAM, 16QAM, etc. Here, the numbers 4, 16, etc. denote the number of modulation points, i.e. the points in the constellation diagram.

The cellular radio communication interface 140 can be designed to transmit the first OFDM transmission data 172a to a first network address of the first cellular radio network 110 stored in the first data memory 180

to send out the second OFDM transmission data 172b to a second network address of the second cellular network 120 stored in the second data memory 190.

The cellular radio communication device 130 can further comprise 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.

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

The mobile radio communication device 130 can furthermore comprise a second actuator or an interface to a second actuator, which is designed to derive or read out a control command for controlling the second actuator from the second data 124 in the second data memory 190 forward 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 can be controlled by the first 114 and second data 124, respectively. The actuators can be household appliances, for example, which can be controlled in the automated house or home via the first 114 or second data 124. Alternatively, the first and the second actuator can be, for example, loudspeakers or vibration devices of the mobile radio communication device 130, which can be controlled and activated via the corresponding first 114 or second data 124.

The first data memory 180 can be designed to delete the first data 114 from the first data memory 180 after the first data 114 has been read out by the communication interface 140.

The second data memory 190 can be designed to delete the second data 124 from the second data memory 190 after the second data 124 has been read out by the communication interface 140.

The communication interface 140 can be designed to interrupt a voltage supply of the first integrated subscriber identity module 150 in order to deactivate the first integrated subscriber identity module 150, and to interrupt a voltage supply of the second integrated subscriber identity module 160 to the second integrated subscriber identity module. Disable identity module 160. 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 to activate the respective integrated subscriber identity module 150, 160 in order to transmit the respective OFDM transmission data 172a, 172b, and the respective integrated subscriber identity module 150, 160 after transmission of the respective OFDM transmission data 172a, 172b to disable.

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

The mobile radio communication device 130 can have a controllable switch which can be controlled by the communication interface 140. The controllable switch can be designed to disconnect the voltage supply from the first integrated subscriber identity module 150 and at the same time to connect the second integrated subscriber identity module 160 to the voltage supply, or to disconnect the voltage supply from the second integrated subscriber identity module 160 and at the same time the first integrated Connect the subscriber identity module 150 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, as described in more detail below for FIGS. 3 and 4, for example.

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

The first mobile radio subscriber identifier 113 can be stored in the first integrated subscriber identity module 150 in a cryptographically encrypted manner using a first public cryptographic key. The second mobile radio subscriber identifier 123 can be stored in cryptographically encrypted form in the second integrated subscriber identity module 160 using a second public cryptographic key. There

The first public cryptographic key can be assigned to the first cellular network 110, and the second public cryptographic key can be assigned to the second cellular network 120.

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

FIG. 2b shows an exemplary frequency diagram of an OFDM modulator 170, as used in FIG. 1, in which the lower frequency bands 211 are used to transmit the first OFDM transmission data 172a to the first mobile radio network 110.

In the frequency diagram, the lower frequency bands 211 are shown with thick lines, which are used for transmitting the first OFDM transmission data 172a. The upper frequency bands 212 are not used for the transmission of the first OFDM transmission data 172a. 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 originate from the first iSIM 150, since the OFDM transmission data 172a is modulated onto the lower frequency carriers 211 and the upper frequency carriers 212 do not contain any signals. The first OFDM transmission data 172a can thus be sent as a broadcast into the network without having to pay attention in the mobile radio communication device 130 to the transmission data of the first iSIM 150 only to the first mobile radio network 110 and the transmission data of the second iSIM 160 only to the second mobile radio network 120 to transfer. The network can make the correct assignment to the first iSIM 150 on the basis of the information that the first OFDM transmission data 172a is being sent in the lower frequency bands.

FIG. 2c shows an exemplary frequency diagram of an OFDM modulator 170, as used in FIG. 1, in which the upper frequency bands 212 are used to transmit the second OFDM transmission data 172b to the second mobile radio network 120.

In the frequency diagram, the upper frequency bands 212 are shown with thick lines, which are used for transmitting the second OFDM transmission data 172b. The lower frequency bands 211 are not used for the transmission of the second OFDM transmission data 172b. 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 originate from the second iSIM 160, since the OFDM transmission data 172b is modulated onto the upper frequency carriers 212 and the lower frequency carriers 211 do not contain any signals. The second OFDM transmission data 172b can thus be sent as a broadcast into the network without having to pay attention in the mobile radio communication device 130, the transmission data of the second iSIM 160 only to the second mobile radio network 120 and the transmission data of the first iSIM 150 only to the first mobile radio network 110 to transfer. The network can make the correct assignment to the second iSIM 160 on the basis of the information that the second OFDM transmission data 172b is being sent in the upper frequency bands.

In the case of more than two iSIMs, a division into more frequency ranges than the lower 211 and upper 212 frequency ranges can be made; for example, the entire frequency range can be subdivided into several sub-ranges up to the order of magnitude of individual frequency bands. In each sub-range 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 of the OFDM carriers, also lie, for example, in the number of QAM modulation points of two QAM constellations implemented in the modulator 202. 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 is 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 done on a QAM constellation with a specific number of QAM modulation points, which

characteristic of the second iSIM 160. Then, based on the number of QAM modulation points within the OFDM modulator 170 in the network, it can be recognized whether it is data from the first iSIM 150 or the second iSIM 160 to be transmitted.

Furthermore, the difference between the first OFDM modulation parameter 115 and the second OFDM modulation parameter 125 can also be implemented, for example, by different characteristic phase shifts of the input signal 201 instead of the different frequency ranges 211, 212 of the OFDM carriers. For example, an input signal 201 corresponding to the first transmission data 171a can have a first predetermined phase shift, while an input signal 201 corresponding to the second transmission data 171b can have a second predetermined phase shift.

Combinations of the distinguishing features described above are also possible. That is to say, the first transmission data 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. Likewise, the second transmission data 171b can be 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 accordingly to more than two transmission data that originate from more than two iSIMs.

FIG. 3 shows a schematic illustration of a mobile radio communication device 130 according to the disclosure in a 5G communication system 300 according to an exemplary embodiment in accordance with the specification 3GPP TS 23.501. The various blocks which such a 5G communication system 300 comprises are shown schematically in FIG.

The mobile radio communication device 130 corresponds to the user equipment (UE) or client terminal, which can be operated by the subscriber in order to initiate communication in the 5G network, i.e. to start communication (mobile originating, MO) or to accept (mobile terminating, MT). The mobile radio communication device 130 can also initiate a 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 receives access to the 5G communication network. The interface between mobile radio communication device 130 and (R) AN can be an air interface if 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 applied in various 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 which 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 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, transmit the first data 114 to the UDM 352 block. For example, measured values or measurement parameters that were recorded by the mobile radio communication device 130 can be stored in the network 300.

The DN (Data Network) 333 provides the data network via which data is transmitted, for example from a mobile radio communication device 130 to another mobile radio communication device 130 or UE. [0111] The first data 114 and / or the second data 124 can thus be transmitted from the mobile radio communication device 130 to another mobile radio communication device or other UE via the DN 333.

The AUF (Authentication Server Function) entity 351 provides authentication functionality with which the subscriber or the mobile radio communication device 130 can register in the network. The first integrated subscriber identity module 150 can, for example, authenticate itself in the 5G network 300 via the AUSF block 351. The second integrated subscriber identity module 160 can also authenticate itself in the 5G network 300 via the AUSF entity 351.

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

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

The 5G communication system 300 shown in Figure 3 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 terminal is only generally referred to as UE (User Equipment) without the special embodiment shown here in FIG. 3 with two integrated subscriber identity modules iSIMI and iSIM2. The mobile radio communication device 130 or UE is either connected to a radio access network (RAN) 331 or an access network (AN) 331. In addition, the mobile radio communication device 130 or UE is connected to the access and mobility function (AMF) 340. The RAN 331 is a base station that uses the new RAT (Radio Access Technology) and advanced LTE technologies, while the AN 331 is a general base station with non-3GPP access, such as WiFi. The next generation core network or the 5G communication system 300 shown in FIG. 3 consists of various network functions (NFs). In Figure 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 subscriber identity modules 150, 160 can select one or more network functions from them to initiate the communication.

The network function (NF) represents the processing function taken over by 3GPP in NextGen or NG. It has both functional behavior and at the same time serves as an interface. A 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 mobile radio communication device 130 is connected to a single AMF 340, for example, since the AMF 340 is independent of the access technology. That is to say, even a mobile radio communication device 130 with multiple access technologies only needs to be connected to a single AMF 340.

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

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

The SMF 341 or SMF entity 341 is responsible for session management and assigns one or more IP addresses to the mobile radio communication device 130. In addition, the SMF 341 selects the UPF 332 and controls the UPF 332 with regard to the data transfer, for example for the transfer of the first data 114. If a mobile radio communication device 130 has several sessions, different SMFs 341 can be assigned to each session in order to handle them individually to control and possibly to provide several functionalities per session.

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

The AUSF 351 or AUSF entity 351 stores data for the authentication of the mobile radio communication device 130, while the UDM 352 stores subscription data or subscriber data of the mobile radio communication device 130. The data network DN 333, which is not part of the NG Core network 300, provides 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 AN 331 and the UPF 332 are defined as N2 302 and N3 303, respectively . 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 is controlled by the AMF 340. N4 304 is used by the SMF 341 and the UPF 332 so that the UPF 332 can be set with the generated control signal from the SMF 341, and the UPF 332 can report its status to the SMF 341. 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 can apply its guidelines to the AMF 340 or the SMF 341. N12 312 is required so that the AMF 340 can authenticate the cellular radio communication device 130. N8, 308 and N10, 310 are defined because the subscription data of the mobile radio communication device 130 is required by the AMF 340 and the SMF 341.

The next generation network 300 is aimed at realizing a separation of user and control or monitoring levels. The user plane carries the user traffic while the control plane carries the signaling in the network. In Figure 3, the UPF 332 is in the user level and all other network functions, that is, AMF 340, SMF 341, PCF 342, AF 343, AUSF 351 and UDM 352 are 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 332 to be provided 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 are independent functions in the control plane. Separate AMF 340 and SMF 341 allow independent development and scaling. Other control level functions such as the PCF 342 and the AUSF 351 can also be separated. The modularized functional design shown in FIG. 3 also enables the next generation network 300 to flexibly support a wide variety of 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 plane supports interactions such as forwarding operations between different UPFs 332.

The next generation network 300 supports roaming, that is, the ability of a cellular network subscriber to automatically receive or make calls, send and receive data or have access to other cellular network services in a cellular network other than his 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").

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

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

The first network slice 440 can also be a home network slice of the first integrated subscriber identity module 150 and a visited network slice of the second integrated subscriber identity module 160, while the second network slice 410 is a home network slice of the second integrated subscriber identity module 150 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, that is to say in which he has concluded 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, that is to say in which he has concluded a contract with the network operator. Usually this is the same user who has acquired two subscriber identity modules.

The first network slice 440 further comprises a session management network element 452, which has the same functionality and the same interfaces as the SMF entity 341 described above for FIG. The first network slice 440 further comprises a database 460 with the network elements authentication server 461, data manager 462 and policy control 463, which have the same functionality and the same interfaces as the network elements AUSF 351, UDM 352 and PCF 342 described above for FIG.

The same network elements, with the same functionalities and interfaces, also comprise the second network slice 410, that is to say 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, the network access entity 451 is arranged, which serves to enable the communication connection to be set up. The mobile radio communication device 130 is connected to the network access entity 451 via the N1 interface 401. The network access entity 451 is connected to individual network elements of the second network slice 410 and the first network slice 440 via various communication interfaces, as already described above in FIG. 3: The network access entity 451 is connected to the communication device 130 via the N1 interface 401 connected. The network access entity 451 is connected to the network access entity 421 of the second network slice 410 via an interface 406.

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

The network access entity 451 of the first network slice 440 also provides the communication interface 140 of the mobile radio communication device 130 with all necessary data for network access via the N1 interface. The network access entity 451 can, for example, query network capabilities of the first network slice 440 from the database 460 of the first network slice 440 via the N8, N12, N15, N22 interfaces in accordance with the system architecture described in FIG A1 interface 406 query subscriber data 406 of the mobile radio communication device 130 via the network access entity 421 from the second network slice 410 of the mobile radio communication device 130.

In the second network slice 410, the network access entity 421 is arranged, which serves to enable the communication connection to be set up. The mobile radio communication device 130 is connected to the network access entity 421 via the N1 interface 402. The network access entity 421 is connected to individual network elements of the second network slice 410 via various communication interfaces, as already described in FIG. 3 above: the network access entity 421 is connected to the communication device 130 via the N1 interface 402. The network access entity 421 is connected to the network access entity 451 of the first network slice 440 via an interface 406.

The second OFDM transmit data 172b is transmitted via the N1 interface 402, as described above with regard to FIG. 1, to the network access entity 421 of the second network slice 410. The transmission takes place in accordance with the second OFDM modulation parameter 125, the second frequency diagram 220 corresponding to this second OFDM modulation parameter 125 differs from the first frequency diagram 210 for transmission in accordance with the first OFDM modulation parameter 115, as shown in FIG. Alternatively or additionally, the second OFDM transmission data 172b can also be transmitted to the second network slice 410 via the N1 interface 401 of the first network slice 440 and the interface 406 between the two network access entities 451, 421. The second OFDM transmission data 172b can also be modulated in accordance with the second frequency diagram 220 during transmission via the N1 interface 401 and the interface 406.

The network access entity 451 of the first network slice 440 also provides the communication interface 140 of the mobile radio communication device 130 with all necessary data for network access via the N1 interface 401. The network access entity 451 can, for example, query network capabilities of the first network slice 440 from the database 460 of the first network slice 440 via the N8, N12, N15, N22 interfaces in accordance with the system architecture described in FIG 406 query subscriber data of the mobile radio communication device 130 via the network access entity 421 from the second network slice 410 of the mobile radio communication device 130.

The network access entity 451 of the first network slice 440 can also query subscriber data, network address of the second network slice 410 and the network identification 121 of the second network slice 410 from the network access entity 421 of the second network slice 410 via the interface 406 and the communication interface 140 of the mobile radio communication device 130. Of course, the network access entity 451 can also direct these queries directly to the database 430 of the second network slice 410 and receive them from there directly, that is to say without a detour via the network access entity 421.

In detail, the method for setting up the communication connection via the network access entity 451 with the first integrated subscriber identity module 150 can run as follows: In a first step, a registration request is sent from the first integrated subscriber identity module 150 to the network access Entity 451 of the first network slice 440. The registration request comprises the first mobile radio subscriber identifier of the first integrated subscriber identity module 150. The registration request is transmitted to the network access entity 451 via the N1 interface 401.

In a further step, the network access entity 451 then queries 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 ID of the first integrated subscriber Identity module 150.

The network identification of the first network slice 440 is then transmitted from the AMF entity 451 of the first network slice 440 to the communication interface 140 of the mobile radio communication device 130 via the N1 interface 401.

The network access data for the access of the first integrated subscriber identity module 150 to the first network slice 440 through the network access entity 451 can then be transferred to the first integrated subscriber identity module 150 together with the network identification of the first network slice 440 or also in chronological order the communication interface N1,401 and the communication interface 140 of the mobile radio communication device 130 are transmitted. The network access data for the access of the first integrated subscriber identity module 150 to the first network slice 440 is based, for example, on the subscriber-specific registration data of the first integrated subscriber identity module 150, such as the first mobile radio subscriber identification of the first integrated subscriber identity module 150 or others Registration data of the first integrated subscriber identity module 150, for example a name, a password, a network key, etc.

The network access data indicate capabilities of the first network slice 440, in particular those capabilities which can be used for the first integrated subscriber identity module 150. Finally, the communication connection is established by 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 radio subscriber identifier 113 of the first subscriber identity module 150 and the network access data the first network slice 440.

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

The registration request can furthermore have an identification of a specific service for which the first integrated subscriber identity module 150 requests the first network slice 440. The specific service can be provided by the first network slice 440 based on the identification of the specific service if the first network slice 440 supports the specific service. Otherwise, i.e. if it does not support the specific service, the network access entity 451 can transmit a network slice ID of another mobile radio 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 can be allocated by the first network slice 440 or to which the first network slice 440 can establish a communication connection, can be transmitted to the first integrated subscriber identity module 150, which supports the specific service.

The registration request can further comprise a key for authenticating the first integrated subscriber identity module 150. The network access entity 451 can authenticate the first integrated subscriber identity module 150 via an authentication entity 461 of the first network slice 440 based on the key. This can take place even before the subscriber-specific registration data is queried.

In detail, the method for establishing the communication connection via the network access entity 451 with the second integrated subscriber identity module 160 can run as follows: In a first step, a registration request is sent from the second integrated subscriber identity module 160 to the network access Entity 451 of the first network slice 440, as already described above for establishing the communication connection with the first integrated subscriber identity module 150. The registration request comprises the second mobile radio subscriber identification 123 of the second integrated subscriber identity module 160. The registration request is transmitted to the network access entity 451 via the N1 interface 401. Alternatively or additionally, the registration request from the second integrated subscriber identity module 160 can be directed to the network access entity 421 of the second network slice 410.

In a further step, the network access entity 451 of the first network slice 440 or the network access entity 421 of the second network slice 410 then asks 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 transferred from the AMF entity 421 of the second network slice 410 via the interface 406 to the AMF entity 451 of the first network slice 440 and from there further via the N1 interface 401 to the communication interface 140 of the mobile radio communication device 130. Alternatively, the network identification of the second network slice 410 is transmitted directly from the AMF entity 421 of the second network slice 410 via the N1 interface 402 to the communication interface 140 of the mobile radio communication device 130.

The network access data for the access of the second integrated subscriber identity module 160 to the second network slice 410 is based, for example, on the subscriber-specific registration data of the second in

Integrated subscriber identity module 160, such as the second mobile radio subscriber identifier of the second integrated subscriber identity module 160 or other registration data of the second integrated subscriber identity module 160, for example a name, a password, a network key, etc.

The network access data indicate capabilities of the second network slice 410, in particular those capabilities which can be used for the second integrated subscriber identity module 160. Finally, the communication connection 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 radio subscriber identification 123 of the second subscriber identity module 160 and the network access data to the second Network slice 410 built.

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

The registration request can furthermore have an identification of a specific service for which the second integrated subscriber identity module 160 requests the second network slice 410. The specific service can be provided by 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 451 can transmit a network slice ID of another cellular network to the second integrated subscriber identity module 160 which supports the specific service. In this case, the network slice ID of a further network slice, which can be allocated by the second network slice 410 or to which the second network slice can establish a communication connection, can also be transmitted to the second integrated subscriber identity module 160, which the specific service supported.

The registration request can further comprise a key for authenticating the second integrated subscriber identity module 160. The network access entity 451 can authenticate the second integrated subscriber identity module 160 via an authentication entity 431 of the second network slice 410 based on the key. This can take place even before the subscriber-specific registration data is queried.

5 shows a schematic illustration 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 having a first network identification 111 and the second cellular network 120 having a second network identification 121, as described above for FIGS. 1 to 4, for example, and for network-dependent OFDM modulation via a cellular radio communication interface 140 of a cellular radio communication device 130.

The mobile radio communication interface 140 has 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 140 is implemented as an embedded integrated circuit and permanently stores a first mobile radio subscriber identification 113 together with the first network identification 111, as described above for FIGS. 1 to 4, for example.

The second integrated subscriber identity module 160 is implemented as an embedded integrated circuit and a second mobile radio subscriber identifier 123 is fixed together with the second network identifier 121, as described above for FIGS. 1 to 4, for example.

The first mobile radio subscriber identifier 113 identifies the first integrated subscriber identity module 150 in the first mobile radio network 110 and the second mobile radio subscriber identifier 123 identifies the second integrated subscriber identity module 160 in the second mobile radio network 120, for example as described above for FIGS. 1 to 4 .

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

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

The mobile radio communication interface 140 has an OFDM modulator, as described above with regard to FIGS. 1 to 4.

The method 500 has the following steps:

Claims (9)

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 in order to receive first transmission data 171a for transmission to the first mobile radio 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 according to the first OFDM modulation parameter 115 by means of the OFDM modulator 170 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 in order to obtain second transmission data 171b for transmission to the second mobile radio 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 according to the second OFDM modulation parameter 125 by means of the OFDM modulator 170 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. These steps correspond, for example, to the functionalities as described above for FIGS. 1 to 4. One aspect of the invention also comprises a computer program product which can be loaded directly into the internal memory of a digital computer and comprises software code sections with which the method 500 described in relation to FIG. 5 or the processes described in relation to FIGS. 1 to 4 are carried out when 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 carry out the method 500 or to implement or control the network components of the communication networks described in FIGS. 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 can be arranged in a computer network, for example in a communication network as described in FIGS. 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 do not have to be directly connected 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 "example" is intended 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 could be made in lieu of those shown and embodiments described can be implemented without departing from the concept of the present invention 1. Mobile radio communication device (130) for wireless communication via a first mobile radio network (110) and via a second mobile radio network (120), the first mobile radio network (110) having a first network identification (111) and the second mobile radio network (120) having a second Having network identification (121), with the following features: a mobile radio communication interface (140) for communication with the first mobile radio network (110) and the second mobile radio 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 multiplexing method, OFDM modulation scheme permanently stores, the second integrated subscriber identity module (160) being implemented as an embedded integrated circuit and permanently stores a second mobile radio subscriber identifier (123) with a second OFDM modulation parameter (125) of the OFDM modulation scheme, the first mobile radio subscriber identifier (113) being the first integrated subscriber identity module (150) in the first mobile radio network ( 110), and wherein the second mobile subscriber identity (123) identifies the second integrated subscriber identity module (160) in the second cellular network (120), the first OFDM modulation parameter indicating first OFDM modulation frequencies, the second OFDM modulation parameter indicating the second OFDM - indicates modulation frequencies which differ from the first OFDM modulation frequencies, the cellular radio communication interface (140) further comprising an OFDM modulator (170) for carrying out the OFDM modulation scheme; 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 cellular communication interface (140) is designed to transmit data to the first cellular network (110), and is further designed to transfer the first data (114) from the first data memory (180) and the first cellular 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 modulation parameter (115) to modulate 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) to the transmit 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) in order to receive second transmission data (171b) for transmission to the second cellular network (120), the cellular communication interface (140) being designed to receive the second OFDM modulation parameter (125) from the second integrated subscriber - To read out the identity module (160) and to 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) in order to receive second OFDM transmission data (172b), the mobile radio communication interface (140) being designed to transmit the second OFDM transmission data (17 2b) to be sent to the second cellular network (120). 2. 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 being lower frequencies than the second frequency range having. 3. 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. 4. 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) ) to send out, and to send out the second OFDM send data (172b) to a second network address of the second cellular network (120) stored in the second data memory (190). 5. 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 assign the first value as the first data (114) in the first data memory (180) store, 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. 6. 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) through the communication interface (140) from the first data memory ( 180), and wherein the second data memory (190) is designed to delete the second data (124) after reading out the second data (124) from the second data memory (190) through the communication interface (140). 7. 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 send out the respective OFDM transmission data (172a, 172b), and deactivate the respective integrated subscriber identity module (150, 160) after the respective data has been sent out. 8. 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 in the second integrated subscriber identity module (160) in cryptographically encrypted form 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). 9. A method (500) for wireless communication over a first cellular network (110) and over 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 radio communication interface (140) of a cellular radio communication device (130), the cellular radio 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 Permanently saves modulation schemes, with the second integrated subscriber ident ity module (160) is implemented as an embedded integrated circuit and permanently stores a second mobile radio subscriber identifier (123) and a second OFDM modulation parameter (125) of the OFDM modulation scheme, the first mobile radio 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), the first OFDM modulation parameter indicating first OFDM modulation frequencies, wherein the second OFDM modulation parameter indicates 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 carry first data for forwarding to the first mobile radio network to save and a second data memory r (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 ) comprises 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) in order to obtain first 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) according to 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) in order to obtain second 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) according to the second OFDM modulation parameter (125) by means of the OFDM modulator (170) 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).