WO2005004524A1

WO2005004524A1 - Mobile radio terminal device

Info

Publication number: WO2005004524A1
Application number: PCT/JP2004/008921
Authority: WO
Inventors: Yoshikazu Ishii
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2003-07-03
Filing date: 2004-06-18
Publication date: 2005-01-13
Also published as: JP2005039795A

Abstract

A network switching control section (104) operates as follows. When the detection information from a radio power detection section (103) indicates that a mobile radio terminal device (100) belongs to the area of the cellular radio network and public radio LAN network, a feature comparison section (1041) compares the features of the cellular radio network and the public radio LAN network. When the comparison results in that the one other than the communication network connected has a predetermined feature, the network switching control section (104) switches to the communication network having the predetermined feature if in the automatic switching mode, and gives notification information prompting switching to a network switching display section (105) and displays it if in the user notification mode.

Description

Technical field

The present invention relates to a mobile wireless terminal device that can be connected to a cellular wireless network and a public wireless LAN network.

Description Background Art ffl Currently available wireless communication systems can be broadly divided into two groups. One is a cellular radio system represented by PHS, GSM, PDC, and IMT 2000, and the other is a wireless port-to-car network (wireless network) represented by IEEEE 802.11a and HYP ERL AN 2. LAN) system. Cellular radio systems are widely available and are the dominant voice communication systems. On the other hand, the wireless rolling area network system has a small area, but the transmission capacity is 1 IMbps at maximum for IEEE 802.11b, and 54 Mbps at maximum for IEEE 802.11a and HYPERL AN2. realizable.

In the future, different wireless networks represented by the above-mentioned cellular wireless system and wireless LAN system will be integrated (hereinafter referred to as an integrated network), and services will be able to move seamlessly between each other's areas and receive services. It is expected that a wireless network that can be built will be established.

In such an integrated network, when a mobile wireless terminal device moves and enters a different wireless network area, the mobile wireless terminal device is switched to a network that can receive a wider bandwidth service, and communication is performed in response to a user request. Depending on the user's preference, such as switching the network to be used, receiving high-capacity services, and selecting a network with low communication costs, or the user's environment such as moving speed, It is desired to switch a communication network. In the switching of the communication network, the switching is automatically performed while the mobile radio terminal device is moving, the selection is performed by the user, or the network is not switched depending on the user's situation such as the moving speed. It is desirable to support various switching modes such as.

A conventional mobile radio terminal detects a plurality of wireless communication means, a data processing means for executing a plurality of application software for executing different processes, and an application software executed by the data processing means. And generates priority information for each wireless communication means. The control means generates a switching signal in accordance with the communication availability information and the priority information of the plurality of wireless communication means, thereby enabling one of the plurality of wireless communication means to operate. The wireless communication function can be automatically switched from the feature information of the application to be executed, the feature information of the wireless communication function, and the information on the communication fee.

However, the conventional mobile wireless terminal device automatically and fixedly switches the wireless communication function from the characteristic information of the application to be executed, the characteristic information of the wireless communication function, and the information on the communication fee. There was a problem of lack of flexibility according to the user's selection, such as automatic switching even if one dared to select one wireless network. In addition, since cellular wireless networks can be used over a wide area, wireless LAN networks have a narrow area, so when mobile wireless terminals move at high speed, frequent switching of communication networks is required, and flexibility according to user selection is required. There was a problem that was even worse. Disclosure of the invention

An object of the present invention is to provide a mobile wireless terminal device that can be connected to a plurality of different wireless networks, and that can select various network switching modes according to user preferences. . The purpose of this is to provide a mobile radio terminal that can connect to different radio networks. This is realized by making it possible to select various network switching modes in the device. Brief Description of Drawings

FIG. 1 is a block diagram showing a configuration of a mobile wireless terminal device according to Embodiment 1 of the present invention,

Figure 2 shows an example of an integrated network.

FIG. 3 is an image diagram of a mobile wireless terminal device according to Embodiment 1 of the present invention, FIG. 4 is a block diagram showing a configuration of a mobile wireless terminal device according to Embodiment 2 of the present invention,

FIG. 5 is a block diagram showing a configuration of a mobile radio terminal apparatus in a mode in which the configuration of the mobile radio terminal apparatus according to Embodiment 3 of the present invention is combined. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. (Embodiment 1)

The mobile radio terminal 100 according to Embodiment 1 will be described with reference to FIG.

The mobile wireless terminal 100 is composed of a cellular wireless interface 101, a public wireless LAN interface 102, a wireless power detection unit 103, a network switching control unit 104, and a network switching display unit 105. A user selection unit 106, a switch unit 1◦7, a data signal processing unit 108, and a state selection unit 109. The wireless power detection section 103 has an area detection section 103. The network switching control unit 104 has a characteristic comparing unit 1041.

The cellular wireless interface 110 and public wireless LAN interface 102 transmit and receive radio waves in the cellular wireless network and public wireless LAN network, as well as modulate and receive transmitted signals. Demodulation of And the received signal strength is given to the wireless power detector 103. The wireless power detector 103 receives the received signal strength from the cellular wireless interface 101 and the public wireless LAN interface 102, and the area detector 103 receives it. It detects whether it is the area of each communication network from the signal strength and generates detection information. The network switching control unit 104 receives the detection information from the wireless power detection unit 103, and the mobile radio terminal device 100 belongs to the area of the cellular wireless network and the public wireless LAN network. In this case, the characteristic comparing unit 1041 compares the characteristics of the cellular wireless network and the public wireless LAN network.

As a result of the comparison, if the one that is not the currently connected communication network has the “predetermined characteristics” described later, the network switching control unit 104 automatically switches the communication mode to the selection mode described later. When the mode is the switching mode, the communication network is switched to a communication network having “predetermined characteristics”. Also, when the selection mode is a mode for notifying the user, the network switching control unit 104 displays notification information for prompting the user to switch the communication network to the network switching display unit 105. give.

The network switching display unit 105 displays the notification information received from the network switching control unit 104. This gives the user an opportunity to decide whether to switch communication networks. When the user selects one of the cellular wireless network and the public wireless LAN network using the user selection unit 106, the selection information is provided from the user selection unit 106 to the network switching control unit 104. The network switching control unit 104 switches to the communication network indicated by the selection information. The switch 107 switches data transmitted from the network side and a data path generated by the mobile radio terminal. The data overnight signal processing unit 108 processes data sent from the network side via the switch unit 107 and sent to the network side. The state selection unit 109 selects the mode of the mobile radio terminal 100, and A mode in which the network switching control unit 104 is operated to automatically switch the communication network (automatic switching mode), and a mode in which the network switching control unit 104 is operated to notify the user of switching (notification mode). One mode can be selected from a mode in which the network switching control unit 104 is not operated (a mode without switching).

FIG. 2 shows an example of an integrated network 200 in which a cellular wireless network in which such mobile wireless terminal devices communicate and a public wireless LAN network are integrated.

The integrated network 200 includes the mobile wireless terminal device 100, a cellular wireless network 203, a public wireless LAN network 204, an in-home network 205, and a public telephone network 206. . In FIG. 2, an area connectable to the cellular wireless network 203 is shown as a cellular wireless area 201, and an area connectable to the public wireless LAN network 204 is shown as a public wireless LAN area 202.

The cellular wireless network 203 and the public wireless LAN network 204 are connected by a heterogeneous network switching device 207, and the mobile wireless terminal device 100 moves from the cellular wireless network 203 to the public Switching from the wireless LAN network 204 and the public wireless LAN network 204 to the cellular wireless network 203 can be performed seamlessly.

In addition, the Internet connection network 205 is connected to a cellular wireless network 203, a public wireless LAN network 204 and a public telephone network 206. The public telephone network 206 is connected to the cellular wireless network 203 and the internet network 205.

FIG. 3 shows an image diagram of the mobile wireless terminal device 100. The mobile communication terminal 100 includes a display unit 301, a speaker 302, a microphone 303, a cellular radio wave status display 304, and a public wireless LAN network. It has a radio wave status display 3 05, a state selection button 3 06, a network selection button 3 07, and a notification display 3 08 for prompting network switching.

The user selects one of the three modes using the state selection buttons 306. When the user has selected the notification mode and the mobile wireless terminal 100 belongs to the cellular wireless LAN and the public wireless LAN network area, a notification display for prompting a network switch 3 08 Is displayed on the display unit 301. The display unit 301 may be a display device, and includes a liquid crystal display, an organic EL display, and the like. Further, the notification for prompting the network switching may be performed by voice from the speaker 302. Further, the mobile radio terminal 100 may be configured to perform the notification for prompting the network switching by vibration or light.

Next, the operation when the mobile radio terminal 100 moves on the integrated network shown in FIG. 2 will be specifically described. Here, a case in which the automatic switching mode is selected by the state selection unit 109 will be described.

When the mobile radio terminal 100 belongs only to the cellular radio area 201, the radio power detection unit 103 receives the received radio power only from the cellular radio interface 101, The network switching control unit 104 is provided with detection information indicating that it belongs to only the cellular wireless area 201 generated by the area detection unit 1031. The network switching control unit 104 controls the switching unit 107 based on the detection information to switch the data path to the cellular-wireless-in-time interface 101 side.

When the mobile wireless terminal 100 belongs to the cellular wireless area 201 and the public wireless LAN area 202, the wireless power detection unit 103 becomes the cellular wireless interface 101 and the public wireless LAN. It receives the received radio wave power from the interface 101 and detects the information that it belongs to the public wireless LAN area 202 and the cellular wireless area 201 generated by the area detection unit 103. Provided to the network switching control section 104. Network switching controller 104 When receiving the detection information that the mobile terminal belongs to the public wireless LAN area 202 and the cellular wireless area 201, the characteristic comparing unit 1041 compares the characteristics of the public wireless LAN area 202 and the cellular wireless area 201, and compares the comparison result. Generate.

When the “predetermined condition” is satisfied, that is, when the comparison result generated by the characteristic comparing unit 1041 is not the currently connected communication network (here, the public wireless LAN network), the network switching control unit 104 , The information for instructing the network side to perform the network switching procedure is transmitted from the data signal processing unit 108 via the cellular wireless interface 101 to the network side. Control to send to network side. Further, the network switching control unit 104 controls the switch unit 107 to switch the data path to the public wireless LAN interface 102 side. When the notification mode is selected, the network switching control unit 104 provides notification information for prompting the user to switch the communication network to the network switching display unit 105.

Here, the characteristic comparison unit 1041 specifically includes the following (1) radio wave environment, (2) communication cost, (3) bandwidth, (4) execution bandwidth, and (5) application or data The characteristics of the public wireless LAN area 202 and the cellular wireless area 201 are compared for the items of the evening type.

(1) Radio wave environment

The characteristic comparing unit 1041 receives two received radio power values from the radio power detection unit 103, that is, a received radio power value at the cellular radio interface 101 and a received radio power value at the public wireless LAN interface 101. Then, the characteristic comparing unit 1041 compares the received radio wave power values at the cellular wireless interface 101 and the public wireless LAN interface 102 to generate a comparison result.

Then, the network switching control unit 104 satisfies the above “predetermined condition”. Then, in the same manner as described above, information for instructing the network side to perform a network switching procedure is sent from the data signal processing unit 108 to the network side via the cellular-wireless interface 101. Control. The “predetermined characteristic” in this case is that the received radio wave power value is large, that is, the radio wave environment is good.

(2) Communication cost

The characteristic comparing unit 1041 compares the communication costs per unit time in each of the cellular wireless network 203 and the public wireless LAN network 204 to generate a comparison result.

When the “predetermined condition” is satisfied, the network switching control unit 104 performs the same control as described above. The “predetermined characteristic” in this case is that the communication cost per unit time is low.

(3) Bandwidth

The characteristic comparing unit 1041 compares the bandwidths of the cellular wireless network 203 and the public wireless LAN network 204 to generate a comparison result.

When the “predetermined condition” is satisfied, the network switching control unit 104 performs the same control as described above. The “predetermined characteristic” in this case is that the bandwidth is wide.

(4) Execution bandwidth

The characteristic comparing unit 1041 compares the effective bandwidth (effective rate) of each of the cellular wireless network 203 and the public wireless LAN network 204 to generate a comparison result.

When the “predetermined condition” is satisfied, the network switching control unit 104 performs the same control as described above. The “predetermined characteristic” in this case is that the effective bandwidth is wide.

In this case, in the mobile radio terminal 100, the own device performs communication. Information on the effective bandwidth transmitted by the base station device of the cellular wireless network 203 and the base station device of the public wireless LAN network 204 is stored in the effective bandwidth information of the mobile wireless terminal device 100. An acquisition unit (not shown) acquires the information via the cellular wireless interface 101 and the public wireless LAN interface 101, and provides the acquired information to the network switching control unit 104. Then, as described above, the characteristic comparison unit 1041 compares the effective bandwidths of the cellular wireless network 203 and the public wireless LAN network 204 to generate a comparison result.

(5) Type of application or application

The characteristic comparison unit 1041 relates to the type of application operating in the data signal processing unit 108 or the type of data processed in the data signal processing unit 108. Information is acquired from the data processing unit 108. When the type of the data being processed in the data signal processing unit 108 is voice data, the characteristic comparison unit 1041 compares the line quality and generates a comparison result. .

When the “predetermined condition” is satisfied, the network switching control unit 104 performs the same control as described above. The “predetermined characteristic” in this case is that the line quality is good. Normally, the cellular wireless network has better circuit quality than the public wireless LAN network, so when the currently connected communication network is the cellular wireless network 203, the network switching control unit 104 does not perform any special operation. .

The characteristic comparison unit 104 operates in the data signal processing unit 108.

When the application is related to an instantaneous connection, the transmission / reception data capacity is compared to generate a comparison result.

Then, when the “predetermined condition” is satisfied, the network switching control unit 104 performs the same control as described above. In this case, "predetermined characteristics" That is, the reliable data capacity is large. Normally, the public wireless LAN network has a larger data transmission / reception capacity than the cellular wireless network. Therefore, when the currently connected communication network is the cellular wireless network 203, the network switching controller 10 4 sends information for instructing the network side to perform a network switching procedure from the data signal processing unit 108 to the network side via the cellular wireless interface 101. Control. In addition, it is necessary to set in advance which of the above five characteristics is to be used to activate the network switching control unit 104 and the characteristic comparison unit 1041.

As described above, according to Embodiment 1 of the present invention, mobile radio terminal apparatus 100 has three switching modes: an automatic switching mode, a notification mode, and a non-switching mode. By having a function that can be changed according to the user's preference and situation, various communication modes and service enjoyment modes can be flexibly supported according to the user's preference and situation.

(Embodiment 2)

The mobile radio terminal 400 according to Embodiment 2 will be described using FIG. Here, the same components as those of the mobile radio terminal apparatus according to Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.

The mobile wireless terminal device 400 includes a network switching control unit 401, a status selecting unit 402, a moving speed detecting unit 403, a cellular wireless interface 1101, a public wireless LAN interface 1 02, a wireless power detection unit 103, a network switching display unit 105, a user selection unit 106, a switch 107, and a data signal processing unit 108. The network disconnection control section 401 has a speed comparison section 4101 and a characteristic comparison section 4102.

The moving speed detection unit 4003 detects the moving speed of the mobile wireless terminal device 400 and generates moving speed information. As a method, for example, the moving speed detector 403 is equipped with a GPS (Global Positioning System) receiver, and moves at regular intervals. The position information of the mobile radio terminal 400 is obtained, the distance moved within a certain time is calculated from the position information, and the distance is divided by the certain time to obtain the speed. The network switching control unit 401 receives the moving speed information of the mobile communication terminal device 400 from the moving speed detecting unit 4003, and the speed comparing unit 4101 compares the moving speed information with a predetermined threshold value. As a result of the comparison, when the moving speed is equal to or higher than the threshold value, the network switching control unit 401 controls the switch unit 107 to give priority to the data path over the cellular wireless interface. 1 Switch to 1 side.

On the other hand, as a result of the comparison, when the moving speed is lower than the threshold value, the characteristic comparing section 4102 compares the characteristics of the cellular wireless network and the public wireless LAN network. As a result of the comparison of the characteristics,

In the case of having the “predetermined characteristic”, and when the selection mode described later is the automatic speed switching mode, the network switching control unit 401 switches to the communication network having the predetermined characteristic j. The state selection unit 402 selects the mode of the mobile wireless terminal device 400. When the moving speed is equal to or higher than the threshold, the mode (the communication network is preferentially switched to the cellular wireless network). Select one mode from speed automatic switching mode), mode that notifies the user to switch (notification mode), or mode in which the network switching control unit 401 is not activated (no switching mode). it can.

This structure is adopted for the following reasons. For example, when the moving speed of a mobile wireless terminal device is high, when entering a wireless LAN network area while communicating via a cellular wireless network, even if the communication network is switched, the wireless LAN The network quickly exits the area because the diameter of the area is as small as tens of meters to 300 meters, and returns to the original cellular wireless network, switching the communication network to a wireless LAN network. Less merit. If the moving speed is as slow as walking, it takes a certain amount of time to get out of the wireless LAN area, and the merit of switching the communication network to the wireless LAN network (eg, For example, high-speed overnight communication is possible).

Next, the operation when mobile radio terminal apparatus 400 moves on the integrated network shown in FIG. 2 will be specifically described. Here, a case where the automatic speed switching mode is selected by the state selection unit 402 will be described.

When the mobile wireless terminal device 400 belongs only to the cellular wireless area 201, the wireless power detection unit 103 receives the received radio power only from the cellular wireless interface 101, The detection information that the area detection unit 1031 belongs to only the cellular wireless area 201 generated by the area detection unit 101 is given to the network switching control unit 401. The network switching control unit 401 controls the switch unit 107 based on the detection information, and switches the data path to the cellular wireless interface 101 side. Note that when the mobile station belongs only to the cellular wireless area 201, the above operation is performed regardless of whether the moving speed is equal to or higher than the threshold. When the mobile wireless terminal device 400 belongs to the cellular wireless area 201 and the public wireless LAN area 202, the wireless power detector 103 detects the cellular wireless interface 101 and the public wireless LAN interface. Receives the received radio wave power from the interface 102 and sends the network information on the detection that it belongs to the public wireless LAN area 202 and the cellular wireless area 201 generated by the area detection unit 103. This is given to the switching control unit 401. Then, the network switching control unit 401 receives the moving speed information of the mobile communication terminal device 400 from the moving speed detecting unit 4003, and the speed comparing unit 4101 compares the moving speed information with a predetermined threshold value. As a result of the comparison, when the moving speed is equal to or higher than the threshold value, the network switching control unit 401 controls the switch unit 107 to give priority to the data path and the cellular wireless interface. 1 Switch to 1 side. In this case, the data path is originally switched to the cellular-radio interface 1101, so no special operation is involved.

On the other hand, when the comparison result indicates that the moving speed is lower than the threshold value, the characteristic comparing section 4102 performs the cellular wireless network 203 and the public wireless LAN network 203. Compare the characteristics of 04. When the “predetermined conditions” are satisfied, that is, as a result of comparing the characteristics, the network switching control unit 401 determines that the public wireless LAN network 204 that is not the currently connected communication network has the “predetermined characteristics”. If so, switch to the public wireless LAN network 204. However, even when the mobile wireless terminal device 400 is moving within the public wireless LAN area 202 and the moving speed of the mobile wireless terminal device 400 after a certain time is equal to or higher than the threshold, the network switching control unit 401 controls the switch unit 107]. Then, preferentially switch to the cellular-wireless interface 101 side of the data path.

Here, similarly to the first embodiment, the characteristic comparing unit 4012 specifically includes the following (1) radio wave environment, (2) communication cost, (3) bandwidth, (4) execution bandwidth , And (5) Compare the characteristics of the public wireless LAN area 202 and the cellular wireless area 201 with respect to the application or data type items.

(1) Radio wave environment

The characteristic comparison unit 40 12 receives two received radio wave power values from the wireless power detection unit 103, that is, the received radio wave power value at the cellular wireless interface 101 and the received radio power value at the public wireless LAN interface 102. Receive. Then, characteristic comparing section 4012 compares the received radio wave power values at cellular wireless interface 101 and wireless LAN interface 102 to generate a comparison result.

Then, when the “predetermined conditions” are satisfied, the network switching control unit 401 sends information for instructing the network side to perform a network switching procedure from the data signal processing unit 108 to the cellular wireless communication, as described above. It is controlled so that it is sent to the network side through the interface 101. The “predetermined characteristic” in this case is that the received radio wave power value is large, that is, the radio wave environment is good.

(2) Communication cost

The characteristic comparison section 40 12 is composed of the cellular radio network 203 and the public radio L The communication cost per unit time in each of the AN networks 204 is compared to generate a comparison result.

Then, when the “predetermined condition” is satisfied, the network switching control unit 401 performs the same control as described above. The “predetermined characteristic” in this case is that the communication cost per unit time is low.

(3) Bandwidth

The characteristic comparison unit 4102 compares the bandwidths of the cellular wireless network 203 and the public wireless LAN network 204 to generate a comparison result.

Then, when the “predetermined condition” is satisfied, the network switching control unit 401 performs the same control as described above. The “predetermined characteristic” in this case is that the bandwidth is wide.

(4) Execution bandwidth

The characteristic comparison unit 4102 compares the effective bandwidth (effective rate) in each of the cellular wireless network 203 and the public wireless LAN network 204 to generate a comparison result.

Then, when the “predetermined condition” is satisfied, the network switching control unit 401 performs the same control as described above. The “predetermined characteristic” in this case is that the effective bandwidth is wide.

In this case, in the mobile wireless terminal device 400, the effective band transmitted by the base station device of the cellular wireless network 203 and the base station device of the public wireless LAN network 204 with which the mobile device communicates is transmitted. The information on the bandwidth is transmitted to an effective bandwidth information acquisition unit (not shown) provided in the mobile wireless terminal device 400 via the cellular wireless interface 101 and the public wireless LAN interface 102. And gives it to the network switching control unit 401. Then, as described above, the characteristic comparing unit 410 compares the effective bandwidths of the cellular wireless network 203 and the public wireless LAN network 204 and generates a comparison result. To achieve.

(5) Application or data type

The characteristic comparing section 4102 stores information on the type of application operating in the data signal processing section 108 or the type of data being processed in the data signal processing section 108. Obtained from the overnight signal processor 108. When the type of the data being processed in the data signal processing unit 108 is voice data, the characteristic comparing unit 41012 compares the line quality and generates a comparison result.

Then, when the “predetermined condition” is satisfied, the network switching control unit 401 performs the same control as described above. The “predetermined characteristic” in this case is that the line quality is good. Normally, a cellular wireless network has better circuit quality than a public wireless LAN network, so when the currently connected communication network is a cellular wireless network 203, the network switching control unit 401 Not accompanied.

When the application operating in the data signal processing unit 108 is related to an in-net connection, the characteristic comparing unit 4102 compares the data capacity that can be transmitted and received. Generate a result.

Then, when the “predetermined condition” is satisfied, the network switching control unit 401 performs the same control as described above. The “predetermined characteristic” in this case is that the data capacity that can be transmitted and received is large. Normally, the public wireless LAN network has a larger transmission / reception capacity than the cellular wireless network, so if the currently connected communication network is the cellular wireless network 203, the network is switched. The control unit 410 sends information for instructing the network side to perform a network switching procedure from the data signal processing unit 108 to the network side via the cellular wireless interface 101. Control. It should be noted that, among the items relating to the above five characteristics, which item activates the network switching control unit 401 and the characteristic comparison unit 401 is set in advance. It is needed.

When the mode of the mobile wireless communication terminal device 400 is the notification mode, when the network switching control unit 401 automatically switches, specifically, the moving speed is equal to or higher than the threshold value. And when the moving speed is less than the threshold value and the characteristics of the cellular wireless network 203 and the public wireless LAN network 204 are compared, it is not the communication network currently connected. When the public wireless LAN network 204 has the predetermined characteristics, the public wireless LAN network 204 does not automatically switch over the communication network, but notifies the user to switch the network.

As described above, according to Embodiment 2 of the present invention, mobile radio terminal apparatus 400 has three switching modes: an automatic speed switching mode, a notification mode, and a non-switching mode. By having a function that can select the user according to the user's preference or situation, it is possible to flexibly support various communication modes and service enjoyment modes according to the user's preference or situation. In addition, frequent switching of the communication network can be prevented by selecting the automatic speed switching mode and controlling the switching of the communication network according to the moving speed of the mobile wireless terminal device.

(Embodiment 3)

The mobile radio terminal 500 according to Embodiment 3 will be described using FIG. Here, the same components as those of the mobile radio terminal apparatus according to Embodiment 1 and Embodiment 2 are denoted by the same reference numerals, and description thereof is omitted.

The mobile wireless terminal device 500 includes a network switching control unit 501, a state selecting unit 502, a cellular wireless interface 101, a public wireless LAN interface 102, and a wireless power detecting unit 103. A network switching display unit 105, a user selection unit 106, a switch unit 107, a data signal processing unit 108, and a moving speed detection unit 403 are provided. The wireless power detection unit 103 has an area detection unit 103. The network switching control section 501 is a characteristic comparison section 1041, a speed ratio And a characteristic comparing section 4102. That is, mobile radio terminal apparatus 500 adopts a configuration in which mobile radio terminal apparatus 100 of Embodiment 1 and mobile radio terminal apparatus 400 of Embodiment 2 are combined.

The network switching control unit 501 has the functions of the network switching control unit 104 and the network switching control unit 401 together. The state selection unit 502 is a mode for automatically switching the communication network (automatic switching mode), and a mode for automatically switching the communication network to the cellular wireless network when the moving speed is equal to or higher than the threshold (automatic speed switching). One mode can be selected from a switching mode), a mode for notifying the user of switching (notification mode), and a mode in which the network switching control unit 501 is not operated (non-switching mode).

As described above, according to Embodiment 3 of the present invention, mobile radio terminal 500 has four switching modes: an automatic switching mode, a speed automatic switching mode, a notification mode, and a non-switching mode; and By having a function of selecting the switching mode according to the user's preference and situation, it is possible to flexibly support various communication modes and service enjoying modes according to the user's preference and situation. Further, by selecting the automatic speed switching mode and controlling the switching of the communication network according to the moving speed of the mobile wireless terminal device, frequent switching of the communication network / network can be prevented.

According to one aspect of the present invention, in a mobile wireless terminal device connectable to a cellular wireless network and a public wireless LAN network, each area of the cellular wireless network and the public wireless LAN network is provided. Area detection means for detecting at regular intervals whether or not they belong to the area and generating a detection result; and indicating that the detection results belong to the cellular wireless network and the public wireless LAN network area. Characteristic comparing means for comparing the characteristics of the cellular wireless network and the public wireless LAN network to generate a comparison result; and the cellular wireless network and the public wireless network having predetermined characteristics based on the comparison result. LAN network Switching means for switching to any one of the cellular wireless network and the public wireless LAN network having predetermined characteristics based on the comparison result. And selecting means for selecting one of the cellular wireless network and the public wireless LAN network based on the notification. According to this configuration, the communication network can be flexibly selected according to the user's preference.

According to another aspect of the present invention, in the above configuration, the predetermined characteristic includes a configuration including a wide bandwidth, a low communication cost, a vacant network, or a large number of service applications. According to this configuration, it is possible to flexibly select a communication network according to the user's preference.

According to another aspect of the present invention, in the above-described configuration, further comprising a moving speed detecting unit that detects a moving speed of the mobile wireless terminal device, wherein the notifying unit is configured as a communication network when the moving speed is equal to or higher than a threshold value. A configuration for giving a notification urging the user to select a cellular wireless network is adopted. According to this configuration, it is possible to prevent frequent switching of the communication network by selecting the automatic speed switching mode and controlling the switching of the communication network in accordance with the moving speed of the mobile wireless terminal device.

According to another aspect of the present invention, in the above configuration, the mobile communication device further includes a moving speed detecting unit that detects a moving speed of the mobile wireless terminal device, wherein the switching unit has a priority as a communication network when the moving speed is equal to or higher than a threshold. A configuration for switching to the cellular one wireless network is adopted. This makes it possible to prevent frequent switching of the communication network by selecting the automatic speed switching mode and controlling the switching of the communication network according to the moving speed of the mobile wireless terminal device.

According to another aspect of the present invention, in the above-described configuration, there is provided state selecting means for selecting a state, wherein the state selecting means is a first selecting means for selecting whether or not to activate the switching means. And when the switching means is not operated Adopts a configuration comprising: a second selecting means for selecting whether or not to activate the notifying means. According to this configuration, various network switching modes can be selected, and the communication network can be flexibly selected according to the user's preference.

According to another aspect of the present invention, in the above-mentioned configuration, the notifying unit employs a configuration in which a notification for prompting switching of the communication network is displayed on the display unit. According to this configuration, a notification for allowing the user to select whether to switch the communication network can be appropriately performed.

According to another aspect of the present invention, in the above-described configuration, the notifying unit employs a configuration in which a notification prompting switching of the communication network is issued by voice. According to this configuration, a notification for allowing the user to select whether or not to switch the communication network can be appropriately performed.

The present specification is based on Japanese Patent Application No. 2003-3191340 filed on Jul. 3, 2003 and Japanese Patent Application No. 2004-1771686 filed on Jun. 9, 2004. These are all included here. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention is useful as a mobile wireless terminal device that can be connected to a plurality of different wireless networks and that can select various network switching modes according to the user's preference.

Claims

The scope of the claims

1. In a mobile wireless terminal device connectable to a cellular wireless network and a public wireless LAN network, it is determined at regular intervals whether or not it belongs to each area of the cellular wireless network and the public wireless LAN network. An error detecting means for detecting and generating a detection result; and when the detection result indicates that the cell belongs to the area of the cellular wireless network and the public wireless LAN network, the cellular wireless network and the public wireless LAN Characteristic comparing means for comparing network characteristics to generate a comparison result; switching means for switching to one of the cellular wireless network and the public wireless LAN network having predetermined characteristics based on the comparison result; The cellular wireless network having predetermined characteristics according to the result. Notification means for determining whether or not to switch to any one of the network and the public wireless LAN network; and any of the cellular wireless network and the public wireless LAN network based on the notification. A mobile radio terminal device comprising:

2. The mobile wireless terminal device according to claim 1, wherein the predetermined characteristics include a wide bandwidth, low communication cost, availability of a network, or a large number of service applications.

3. It has a moving speed detecting means for detecting a moving speed of the mobile wireless terminal device, and the notifying means gives a notification prompting selection of the cellular wireless network as a communication network when the moving speed is equal to or higher than a threshold. Claim 1

4. A moving speed detecting unit for detecting a moving speed of the mobile wireless terminal device, wherein the switching unit switches to the cellular wireless network preferentially as a communication network when the moving speed is equal to or higher than a threshold value. Scope 1

5. The apparatus further comprises state selection means for selecting a state of the mobile wireless terminal device, wherein the state selection means is a first selection means for selecting whether to activate the switching means, and the switching means. The mobile radio terminal device according to claim 1, further comprising: a second selection unit that selects whether to set the notification unit to an operation state when the operation unit is not operated.

6. The mobile wireless terminal device according to claim 1, wherein the notification unit displays a notification prompting switching of a communication network on a display unit.

7. The mobile wireless terminal device according to claim 1, wherein said notification means issues a notification prompting switching of a communication network by voice.