Mobile terminal and communication method

The present invention is a mobile terminal capable of connecting to a plurality of mobile communication systems having different types of communication services provided, and selecting any of the mobile communication systems as a service area system, which is a mobile communication system in the service area. The present invention relates to a communication method used in the mobile terminal.

In the 3rd generation mobile communication system (UMTS) that follows the standard standardized in the 3rd Generation Partnership Project (3GPP), a CS domain composed of circuit-switched communication networks and a packet-switched communication network (IP network) A PS domain composed of is used (for example, Patent Document 1). In UMTS, the transmission of specific communication services, specifically AV content such as voice calls and moving images, is performed using the CS domain. In addition, data communication such as sending e-mail is executed using the PS domain.

On the other hand, in Long Term Evolution (LTE), which is the next-generation mobile communication system that is also being standardized in 3GPP, only the PS domain is used. That is, all communication services are executed using the PS domain regardless of the type of communication service provided.

However, it is not always easy at present to realize voice calls and transmission of AV contents to mobile terminals using the PS domain while ensuring the desired communication quality because there are technical issues to be overcome such as priority control. Not. In addition, since the service area provided by LTE is limited at the beginning of LTE operation, if voice calls are realized using LTE, a new handover technology for voice calls from LTE to UMTS will be required, and conventional technology will be required. It is also necessary to make efficient use of UMTS assets.

Therefore, at least at the beginning of LTE operation, it is planned to realize voice calls and transmission of AV contents using the CS domain of UMTS, and to realize data communication such as transmission of e-mail using LTE.

In order to start communication using the CS domain, such as a voice call, when the mobile terminal is in the coverage area of the base station by performing location registration in LTE, the mobile terminal is in the service area. A method called CS Fallback (CSFB), which requests a call in LTE and switches the mobile communication system in the area, so-called Radio Access Technology (RAT), to UMTS based on the instruction from LTE, is standardized in 3GPP ( See Non-Patent Document 1).

Furthermore, when the mobile terminal is in UMTS, in order to start communication using the PS domain such as data communication, the mobile terminal requests a call in UMTS and is in the area based on the instruction from UMTS. The method of switching RAT to LTE is also being standardized in 3GPP.

In addition, Access Class regulation is stipulated in 3GPP as a transmission regulation method when the network constituting UMTS or LTE is congested (see Non-Patent Document 2 and Non-Patent Document 3). The Access Class regulation stipulates a method of restricting outgoing calls from a mobile terminal by notifying the mobile terminal of the regulation information when the network is congested.<nplcit num="1"><text>3GPP TS 23.272 V8.1.0 Circuit Switched Fallback in Evolved Packet System; Stage 2 (Release 8), 3GPP, September 2008</text></nplcit><nplcit num="2"><text>3GPP TS 25.304 V8.3.0 User Equipment (UE) procedures in idle mode and procedures for cell reselection in connected mode (Release 8), 3GPP, September 2008</text></nplcit><nplcit num="3"><text>3GPP TS 36.304 V8.3.0 User Equipment (UE) procedures in idle mode (Release 8), 3GPP, September 2008</text></nplcit>

<p> However, the above-mentioned transmission regulation, specifically the Access Class regulation, has the following problems. That is, since the Access Class regulation is activated for the RAT in which the mobile terminal is located, for example, the Access Class regulation is activated in LTE in which the mobile terminal is located, and the Access Class regulation is activated in UMTS. If not, the mobile terminal has a problem that it cannot start communication using the CS domain such as a voice call even though it can make a call via UMTS.</p><p> Similarly, if the Access Class regulation is activated in UMTS where the mobile terminal is located and the Access Class regulation is not activated in LTE, the mobile terminal can make a call via LTE, but data communication etc. There is a problem that communication using the PS domain of is not possible.</p><p> Therefore, the present invention has been made in view of such a situation, and when it is possible to connect to a plurality of RATs, even if a transmission restriction such as an Access Class regulation is activated in any of the RATs, communication is performed. The purpose is to provide a mobile terminal and a communication method with an improved possibility of starting.</p>

<p> In order to solve the above-mentioned problems, the present invention has the following features. First, the first feature of the present invention is that it is possible to connect to a plurality of mobile communication systems (UMTS10 and LTE20) having different types of communication services provided (for example, voice call and e-mail transmission), and any one of them. A mobile terminal (mobile terminal 100) that selects a mobile communication system as a service area system that is a mobile communication system in the area, and is notified by the service area system and is restricted from transmitting (Access) in the service area system. The mobile communication is based on the regulation information management unit (regulation information management unit 150) that manages the regulation information indicating whether or not the class regulation) is performed and the regulation information managed by the regulation information management department. It is provided with a transmission control unit (transmission control unit 160) that controls transmission to the system and a sphere control unit (area RAT control unit 170) that controls the territory system based on the control by the transmission control unit. When the transmission control unit receives a transmission request, the service area control unit provides a communication service used in response to the transmission request when the transmission restriction is applied in the service area system. The gist is to switch the territory system to the communication system.</p><p> According to such a mobile terminal, when the transmission control unit receives the transmission request and the transmission is restricted in the service area system, the mobile communication that provides the communication service used in accordance with the transmission request. You can switch the local system to the system and try to make a call.</p><p> Therefore, even if a transmission restriction such as an Access Class regulation is activated in any of the mobile communication systems (RAT), the possibility of starting communication is improved. That is, the chance that the mobile terminal cannot start the desired communication is reduced, and the convenience of the user is improved.</p><p> The second feature of the present invention relates to the first feature of the present invention, and the transmission control unit is said to be in the service area when the transmission restriction is not performed in the mobile communication system to which the system in the service area is switched. The gist is to switch the system.</p><p> A third feature of the present invention relates to the first feature of the present invention, wherein the plurality of mobile communication systems have a CS domain composed of a circuit-switched communication network (UMTS10). And a second mobile communication system (LTE20) having a PS domain configured by a packet-switched communication network, and the sphere control unit is in the sphere of the second mobile communication system. When the transmission request using the CS domain is received, the gist is to switch the service area system to the first mobile communication system.</p><p> A fourth feature of the present invention relates to the first feature of the present invention, wherein the plurality of mobile communication systems have a CS domain composed of a circuit-switched communication network (UMTS10). And a second mobile communication system (LTE20) having a PS domain configured by a packet-switched communication network, and the sphere control unit is in the first mobile communication system. When the transmission request using the PS domain is received, the gist is to switch the service area system to the second mobile communication system.</p><p> The fifth feature of the present invention is that it is possible to connect to a plurality of mobile communication systems having different types of communication services provided, and one of the mobile communication systems is selected as the service area system which is the mobile system in the area. It is a communication method used in the mobile terminal, and the mobile terminal manages and manages regulation information notified from the service area system and indicating whether or not the transmission control is performed in the service area system. The sphere system is provided with a step of controlling a transmission to the mobile communication system based on the regulation information and a step of controlling the sphere system based on the control of the step of controlling the transmission. In the step of controlling, when the transmission request is received, if the transmission restriction is performed in the service area system, the mobile communication system that provides the communication service used in accordance with the transmission request is in the service area. The gist is to switch the system.</p>

<p> According to the features of the present invention, when it is possible to connect to a plurality of RATs, a mobile terminal with improved possibility of starting communication even when a transmission restriction such as an Access Class regulation is activated in any of the RATs. And can provide communication methods.</p>

Next, an embodiment of the present invention will be described. Specifically, (1) the overall outline configuration of the mobile communication system, (2) the functional block configuration of the mobile terminal, (3) the operation of the mobile terminal, (4) the action / effect, and (5) other embodiments. explain.

In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratio of each dimension is different from the actual one.

Therefore, the specific dimensions should be determined in consideration of the following explanation. In addition, it goes without saying that the drawings include parts having different dimensional relationships and ratios from each other.

(1) Overall outline configuration of mobile communication system FIG. 1 is an overall schematic configuration diagram of the mobile communication system 1 according to the present embodiment. As shown in FIG. 1, the mobile communication system 1 is composed of UMTS10 and LTE20. That is, the mobile communication system 1 is composed of a plurality of mobile communication systems, so-called Radio Access Technology (RAT).

UMTS10 is a 3rd generation mobile communication system that complies with the standards standardized by the 3rd Generation Partnership Project (3GPP). UMTS10 is composed of a CS domain (Circuit Switched domain) composed of circuit-switched communication networks and a PS domain (Packet Switched domain) composed of packet-switched communication networks (IP networks). In this embodiment, the UMTS 10 constitutes a first mobile communication system.

LTE20 is a mobile communication system that follows Long Term Evolution (LTE), which is also standardized in 3GPP. LTE20 consists only of PS domain. In this embodiment, the LTE 20 constitutes a second mobile communication system.

The mobile terminal 100 can be connected to UMTS10 and LTE20. Specifically, the mobile terminal 100 connects to either UMTS10 or LTE20 depending on the operation content of the user, that is, the type of communication service to be used. The mobile terminal 100 executes wireless communication with the UMTS base station 11 and connects to the UMTS 10. Further, the mobile terminal 100 executes wireless communication with the LTE base station 21 and connects to the LTE 20.

The mobile terminal 100 may be located in an area where the cover area A10 formed by the UMTS base station 11 and the cover area A20 formed by the LTE base station 21 overlap (hatched portion in the figure). In such a case, the mobile terminal 100 selects either UMTS10 or LTE20 as a service area system, which is a mobile communication system in the service area. Specifically, the mobile terminal 100 performs any mobile communication system by executing location registration to UMTS 10 via UMTS base station 11 or location registration to LTE 20 via LTE base station 21. Select as a local system.

In this embodiment, the types of communication services provided differ between UMTS10 and LTE20. Specifically, voice calls and transmission of AV contents are realized using the CS domain of UMTS10. On the other hand, data communication such as sending e-mail is realized using the PS domain of LTE20.

(2) Functional block configuration of mobile terminals FIG. 2 is a functional block diagram of the mobile terminal 100. As shown in FIG. 2, the mobile terminal 100 includes a user interface 110, a UMTS communication control unit 120, an LTE communication control unit 130, a USIM 140, a regulation information management unit 150, a transmission control unit 160, and a service area RAT control unit 170. Hereinafter, the parts related to the present invention will be mainly described. Therefore, it should be noted that the mobile terminal 100 includes a functional block (such as a power supply unit) that is indispensable for realizing the function as the mobile terminal 100 and is not shown or explained.

The user interface 110 provides an interface that realizes an operation input from the user of the mobile terminal 100 to the mobile terminal 100 and an output from the mobile terminal 100 to the user. Specifically, the user interface 110 is composed of operation keys, a microphone, a liquid crystal display, a speaker, and the like. The user requests the desired communication by manipulating the user interface 110.

The UMTS communication control unit 120 controls the communication executed via UMTS 10. In particular, in the present embodiment, the UMTS communication control unit 120 receives the UMTS 10 regulation information notified from the UMTS 10 via the UMTS base station 11. The regulation information is included in the notification information notified from the UMTS 10 to the mobile terminal 100 when it is necessary to restrict the transmission from the mobile terminal 100, such as when the network constituting the UMTS 10 is congested. The UMTS communication control unit 120 transfers the received UMTS 10 regulation information to the regulation information management unit 150.

The UMTS communication control unit 120 inquires to the regulation information management unit 150 whether or not the Access Control Class assigned to the mobile terminal 100 (USIM140) is restricted from outgoing transmission, and responds to the inquiry from the regulation information management unit 150. Whether or not there is a transmission restriction is determined based on this.

The LTE communication control unit 130 controls the communication executed via the LTE 20. In particular, in the present embodiment, the LTE communication control unit 130 receives the LTE 20 regulation information notified from the LTE 20 via the LTE base station 21. The LTE communication control unit 130 transfers the received LTE 20 regulation information to the regulation information management unit 150.

The LTE communication control unit 130 inquires to the regulation information management unit 150 whether or not the Access Control Class assigned to the mobile terminal 100 (USIM140) is restricted from outgoing transmission, and responds to the inquiry from the regulation information management unit 150. Whether or not there is a transmission restriction is determined based on this.

Further, the UMTS communication control unit 120 and the LTE communication control unit 130 switch the RAT (mobile communication system) based on the instruction from the service area RAT control unit 170.

The USIM140 is a Universal Subscriber Identity Module card that stores the contract details of the mobile terminal 100. In particular, in this embodiment, the USIM 140 stores an Access Control Class List according to the format shown in FIG. The format of the Access Control Class List is specified in 3GPP TS31.102.

The regulation information management unit 150 is notified from the service area system in which the mobile terminal 100 is located, and manages the regulation information indicating whether or not Access Class regulation is applied in the service area system. Specifically, the regulation information management unit 150 manages the regulation information list L1 shown in FIG. 6 based on the regulation information notified from the service area system via the UMTS communication control unit 120 or the LTE communication control unit 130. ..

FIG. 6 shows an example of the regulation information list L1 managed by the regulation information management unit 150. As shown in Fig. 6, in the regulation information list L1, Access Control Classes from 0 to 15 are assigned. In the regulation information list L1, each Access Control Class is indicated by whether or not a class is assigned. In the Access Control Class (for example, "1") assigned to the mobile terminal 100 (USIM140), if the outgoing call is restricted (the applicable class is barred in the regulation information of the notification information), the mobile terminal 100 is set to UMTS10. It is not possible to make a call to, that is, to start communication.

The regulation information management unit 150 acquires the value (0 to 15) of the Access Control Class assigned to the mobile terminal 100 from the USIM 140. Further, the regulation information management unit 150 receives the regulation information included in the notification information and transmitted via the UMTS communication control unit 120 and the LTE communication control unit 130. Based on these two pieces of information, the regulatory information management unit 150 determines whether or not there is a transmission restriction in UMTS10 or LTE20.

The USIM information in the regulation information list L1 is common to UMTS10 and LTE20. In addition, the regulatory information management unit 150 can acquire only the regulatory information of UMTS10 when it is in the area of UMTS10, and can acquire only the regulatory information of LTE20 when it is in the area of LTE20.

The transmission control unit 160 controls the transmission to the UMTS 10 or LTE 20 based on the regulation information managed by the regulation information management unit 150. Specifically, when the user receives a call request to the service area using the user interface 110, the call control unit 160 determines whether or not the call control is applied in the service area system. Therefore, the presence or absence of the call control is applied. Contact the Regulatory Information Management Department 150.

The transmission control unit 160 transmits to the service area system when it is possible to transmit to the service area system, that is, when the service area system does not regulate transmission. On the other hand, when the transmission is restricted in the service area system, the transmission control unit 160 requests the service area RAT control unit 170 to switch to a RAT different from the service area system.

Further, when the RAT different from that of the service area system is switched, the transmission control unit 160 inquires to the regulation information management unit 150 whether or not the RAT after the switching can make a transmission. If the transmission cannot be made even in the RAT after switching due to the transmission restriction, the transmission control unit 160 notifies the user that the transmission cannot be made via the user interface 110.

If the transmission control unit 160 does not restrict transmission in the RAT after switching and can transmit, the transmission control unit 160 transmits a transmission request to the RAT after switching. That is, the transmission control unit 160 switches the service area system when the transmission control is not performed in the mobile communication system to which the service area system is switched.

The service area RAT control unit 170 controls the service area system based on the control by the transmission control unit 160. Specifically, when the transmission control unit 160 requests the RAT switching, the service area RAT control unit 170 instructs the UMTS communication control unit 120 and the LTE communication control unit 130 to switch the RAT. In the present embodiment, the service area RAT control unit 170 constitutes the service area control unit.

In particular, in the present embodiment, the service area RAT control unit 170 is used in association with the call transmission request when the call control unit 160 receives the call transmission request and the transmission restriction is applied in the service area system. Switch the service area system to a mobile communication system that provides communication services.

Specifically, when the outbound RAT control unit 170 receives an outgoing request using the PS domain, for example, an e-mail transmission request when the outgoing call is restricted in the UMTS10 in the area, the LTE 20 is set. Switch the service area system. In other words, since data communication such as sending e-mail is executed using the PS domain of LTE20, the service area system can be switched to UMTS10.

In addition, when the service area RAT control unit 170 receives a call request using the CS domain, for example, a voice call call request when the call is restricted in the LTE 20 in the service area, the service area system is set to the UMTS10. To switch. In other words, since LTE20 is only a PS domain, the service area system can be switched to UMTS10.

Further, the service area RAT control unit 170 can switch the service area system to UMTS 10 when receiving a call request using the PS domain when the service area is restricted in LTE 20.

When the service area system is switched, the service area RAT control unit 170 notifies the transmission control unit 160 that the service area system has been switched.

(3) Operation of mobile terminals Next, the operation of the mobile terminal 100 will be described. Specifically, (3.1) switching of the territorial system at the time of transmission restriction in LTE20 and (3.2) switching of the territory system at the time of transmission regulation in UMTS10 will be described.

(3.1) Switching of the service area system when outgoing transmission is restricted by LTE20 First, we will explain the switching of the in-service system when the transmission is restricted by LTE20. Specifically, (3.1.1) When the mobile terminal 100 receives a call request using the CS domain when the outgoing call is restricted in LTE20 where the mobile terminal 100 is located, the service area system Switching and (3.1.2) Switching of the service area system when the mobile terminal 100 receives a call request using the PS domain when the call is restricted in LTE 20 where the mobile terminal 100 is located. explain.

(3.1.1) Switching of service area system in response to outgoing request using CS domain Figure 3 shows the switching sequence of the in-service system (No. 1) when the transmission is restricted by LTE20. As shown in FIG. 3, in step S10, the mobile terminal 100 is in the LTE 20 area. Specifically, the mobile terminal 100 selects LTE 20 as a service area system by executing location registration to LTE 20 via the LTE base station 21.

In step S20, the mobile terminal 100 receives the regulation information from the LTE 20. Specifically, the LTE 20 needs to regulate transmission due to network congestion or the like, and the notification information transmitted from the LTE base station 21 includes the regulation information and is transmitted to the mobile terminal 100.

In step S25, the mobile terminal 100 determines that transmission is being restricted in LTE 20 based on the received regulation information.

In step S30, the mobile terminal 100 receives an outgoing request for a voice call. Since the voice call is executed using the CS domain of UMTS10, the mobile terminal 100 determines that it is necessary to switch the service area system.

In step S40, the mobile terminal 100 receives the broadcast information periodically transmitted from the UMTS 10. The notification information transmitted from UMTS10 includes regulatory information indicating whether or not transmission is restricted in UMTS10. The mobile terminal 100 updates the content of the regulation information managed by the regulation information management unit 150 based on the received regulation information.

In step S50, the mobile terminal 100 determines whether or not transmission restriction is applied in UMTS10 based on the notification information received from UMTS10.

If the UMTS10 does not have outgoing call restrictions (NO in step S50), in step S55, the mobile terminal 100 switches the service area system from LTE20 to UMTS10.

In step S60, the mobile terminal 100 transmits a voice call transmission request to the UMTS 10.

(3.1.2) Switching of the service area system according to the outgoing request using the PS domain Figure 4 shows the switching sequence of the in-service system (No. 2) when the transmission is restricted by LTE20. Hereinafter, the parts different from the switching sequence of the in-service system (No. 1) at the time of transmission restriction in LTE20 shown in FIG. 3 will be mainly described, and the description thereof will be omitted as appropriate for the same parts.

The processing of steps S10 to S25 is the same as that of the switching sequence (No. 1). In step S30A, the mobile terminal 100 receives a transmission request using the PS domain, specifically, a packet transmission request such as e-mail transmission. Based on the fact that the mobile terminal 100 can perform data communication such as sending e-mail with either UMTS10 or LTE20, and that transmission is restricted in LTE20, the mobile terminal 100 can switch the service area system. Judge as necessary.

The processing after step S40 is the same as the switching sequence (No. 1), and the mobile terminal 100 transmits a packet transmission request to UMTS10 after switching the service area system from LTE20 to UMTS10.

(3.2) Switching of the service area system when the transmission is restricted by UMTS10 Next, the switching of the service area system when the transmission is restricted by UMTS10 will be described. Figure 5 shows the switching sequence of the in-service system when the transmission is restricted by UMTS10. Hereinafter, the description of the same part as the switching sequence of the in-service system at the time of transmission restriction in LTE20 described above will be omitted as appropriate.

As shown in FIG. 5, in step S110, the mobile terminal 100 is in the UMTS10.

In step S120, the mobile terminal 100 receives regulatory information from LTE 20. In step S25, the mobile terminal 100 determines that transmission is being restricted in UMTS10 based on the received regulation information.

In step S130, the mobile terminal 100 receives a transmission request using the PS domain, specifically, a packet transmission request such as an e-mail transmission. Since data communication such as e-mail transmission is executed using the PS domain of LTE20, the mobile terminal 100 determines that it is necessary to switch the service area system.

In step S140, the mobile terminal 100 receives the broadcast information periodically transmitted from the LTE 20.

In step S150, the mobile terminal 100 determines whether or not transmission restriction is performed in LTE 20 based on the notification information received from LTE 20.

If the transmission is not regulated in LTE20 (NO in step S150), in step S155, the mobile terminal 100 switches the service area system from UMTS10 to LTE20.

In step S160, the mobile terminal 100 transmits a packet transmission request to LTE 20.

(4) Action / effect According to the mobile terminal 100, when the transmission control unit 160 receives the transmission request, if the transmission is restricted in the service area system, the mobile communication system provides the communication service used in accordance with the transmission request. The service area system is switched to.

Therefore, even if a transmission restriction such as an Access Class regulation is activated in any of the mobile communication systems (RAT), the possibility of starting communication is improved. That is, the chance that the mobile terminal 100 cannot start the desired communication is reduced, and the convenience of the user is improved.

In the present embodiment, the transmission control unit 160 switches the service area system when the transmission control is not performed in the mobile communication system to which the service area system is switched. Therefore, the service area system can be switched only when the communication can be surely started in the mobile communication system of the switching destination. That is, it is possible to suppress unnecessary switching of the territorial system.

In the present embodiment, the service area RAT control unit 170 switches the service area system to UMTS 10 when receiving a transmission request using the CS domain while in the LTE 20 service area. Further, when the service area RAT control unit 170 receives a transmission request using the PS domain while in the service area of UMTS10, the service area system is switched to LTE 20. Therefore, it is possible to select an appropriate switching destination of the service area according to the type of communication service related to the outgoing call request.

(5) Other embodiments As mentioned above, although the content of the invention has been disclosed through one embodiment of the invention, the statements and drawings that form part of this disclosure should not be understood to limit the invention. This disclosure will reveal to those skilled in the art various alternative embodiments.

For example, in the above-described embodiment of the present invention, when the mobile terminal 100 receives a transmission request using the CS domain while in the LTE 20 area, the mobile terminal 100 switches the area system to the UMTS 10 and is in the UMTS 10 area. When a call request using the PS domain is received while the terminal is operating, the service area system is switched to LTE 20, but the mobile terminal 100 does not necessarily have to operate in this way. For example, when a transmission request is received when transmission is restricted in the service area system, the mobile terminal 100 may switch the service area system regardless of the type of communication service related to the transmission request.

Further, in the above-described embodiment, the mobile terminal 100 switches the service area system when the mobile communication system at the switch destination of the service area system does not restrict transmission, but the mobile terminal 100 switches the switch destination. The service area system may be switched regardless of whether or not transmission is restricted in the communication system.

Further, in the above-described embodiment, UMTS10 is composed of a CS domain and a PS domain, and LTE20 is composed of only a PS domain. However, each of UMTS10 and LTE20 is composed of a CS domain and a PS domain. May be good. Alternatively, UMTS10 may consist only of the CS domain.

As described above, it goes without saying that the present invention includes various embodiments not described here. Therefore, the technical scope of the present invention is defined only by the matters specifying the invention relating to the reasonable claims from the above description.

<figref num="1">It is an overall schematic block diagram of the mobile communication system 1 which concerns on embodiment of this invention.</figref><figref num="2">It is a functional block diagram of the mobile terminal 100 which concerns on embodiment of this invention.</figref><figref num="3">It is a figure which shows the switching sequence (the 1) of the area system at the time of transmission restriction by LTE 20 which concerns on embodiment of this invention.</figref><figref num="4">It is a figure which shows the switching sequence (the 2) of the area system at the time of transmission restriction by LTE 20 which concerns on embodiment of this invention.</figref><figref num="5">It is a figure which shows the switching sequence of the area system at the time of transmission restriction in UMTS10 which concerns on embodiment of this invention.</figref><figref num="6">It is a figure which shows the example of the regulation information list L1 stored in the regulation information management part 150 which concerns on embodiment of this invention.</figref><figref num="7">It is a figure which shows the format of the Access Control Class List stored in the USIM 140 which concerns on embodiment of this invention.</figref>

Code description

1 ... Mobile Communication System, 10 ... UMTS, 11 ... UMTS Base Station, 20 ... LTE, 21 ... LTE Base Station, 100 ... Mobile Terminal, 110 ... User Interface, 120 ... UMTS Communication Control Unit, 130 ... LTE Communication Control Unit, 140 ... USIM, 150 ... Regulatory Information Management Department, 160 ... Outgoing Control Unit, 170 ... Area RAT Control Unit , A10, A20 ... Covered area, L1 ... Regulatory information list