JP2005039795A - Mobile radio terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile radio terminal device in which various network switching modes can be selected in accordance with the preference of a user. <P>SOLUTION: In a network switching control section 104, 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. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mobile wireless terminal device connectable to a cellular wireless network and a public wireless LAN network.

  Wireless communication systems that are currently in practical use can be roughly divided into two groups. One is a cellular wireless system represented by PHS, GSM, PDC and IMT2000, and the other is a wireless local network (wireless LAN) system represented by IEEE802.11a / b and HYPERLAN2. The cellular radio system can be used over a wide range and is a powerful system as a voice communication system. On the other hand, although the wireless local area network system has a small area, the transmission capacity is 11 Mbps at the maximum in IEEE802.11b, and 54 Mbps at the maximum in IEEE802.11a and HYPERLAN2.

  In the future, a plurality of different wireless networks represented by the above-described cellular wireless system and wireless LAN system will be integrated (hereinafter referred to as an integrated network), and wireless that can be moved seamlessly between areas and receive services. A network is expected to be built.

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

A conventional mobile radio terminal device in such an integrated network is disclosed in Patent Document 1. A conventional mobile radio terminal apparatus detects a plurality of radio 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 for each radio communication means. Generates priority information. The control means generates a switching signal according to the communication enable / disable information and 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 related to the communication fee.
JP 10-327463 A

  However, the conventional mobile radio terminal device automatically switches the radio communication function from the feature information of the application to be executed, the feature information of the radio communication function, and the information related to the communication fee. Even when one wireless network is selected, there is a problem that lacks flexibility in response to the user's selection, such as automatic switching. In addition, a cellular wireless network can be used in a wide area, whereas a wireless LAN network has a small area. Therefore, when a mobile wireless terminal device moves at a high speed, frequent switching of a communication network is required, and flexibility according to a user's selection can be obtained. There was a further problem.

  The present invention has been made in view of the above points, and is a mobile radio terminal device that can be connected to a plurality of different radio networks, and can select various network switching modes according to user preferences. An object is to provide an apparatus.

  The mobile radio terminal apparatus according to claim 1 is a mobile radio terminal apparatus connectable to a cellular radio network and a public radio LAN network, and whether or not the mobile radio terminal apparatus belongs to each area of the cellular radio network and the public radio LAN network Detecting at regular intervals and generating a detection result, and when the detection result indicates that it belongs to an area of the cellular wireless network and the public wireless LAN network, the cellular wireless network and the Characteristic comparison means for comparing the characteristics of a public wireless LAN network and generating a comparison result; switching means for switching to one of the cellular wireless network and the public wireless LAN network having a predetermined characteristic according to the comparison result; Depending on the comparison result, A notification means for making a determination as to whether or not to switch to either the cellular wireless network or the public wireless LAN network, and any of the cellular wireless network and the public wireless LAN network based on the notification And a selecting means for selecting the above.

  According to this configuration, the communication network can be flexibly selected according to the user's preference.

  The mobile radio terminal apparatus according to claim 2 is the mobile radio terminal apparatus according to claim 1, wherein the predetermined characteristics are: bandwidth, low communication cost, availability of network, or a large number of service applications. The composition including is taken.

  According to this configuration, similarly to the effect of the invention according to claim 1, it is possible to flexibly select the communication network according to the user's preference.

  A mobile radio terminal apparatus according to claim 3 is the mobile radio terminal apparatus according to claim 1 or 2, further comprising a movement speed detection unit that detects a movement speed of the mobile radio terminal apparatus, and the notification unit includes: When the moving speed is equal to or higher than a threshold value, a configuration is adopted in which a notification for prompting selection of the cellular radio network as a communication network is made.

  According to this configuration, in addition to the effects of the invention according to claim 1 or claim 2, by selecting the automatic speed switching mode and controlling the switching of the communication network according to the moving speed of the mobile radio terminal device, the communication It is possible to prevent frequent switching of the network.

  A mobile radio terminal apparatus according to claim 4 is the mobile radio terminal apparatus according to claim 1 or 2, wherein the mobile radio terminal apparatus has a moving speed detecting means for detecting a moving speed of the mobile radio terminal apparatus, and the switching means includes: When the moving speed is equal to or higher than a threshold value, the communication network is preferentially switched to the cellular radio network.

  According to this configuration, in addition to the effects of the invention according to claim 1 or claim 2, by selecting the automatic speed switching mode and controlling the switching of the communication network according to the moving speed of the mobile radio terminal device, the communication It is possible to prevent frequent switching of the network.

  The mobile radio terminal apparatus according to claim 5 is the mobile radio terminal apparatus according to any one of claims 1 to 4, further comprising state selection means for selecting a state, wherein the state selection means is the switching means. First selection means for selecting whether or not to make the operation state, and second selection means for selecting whether or not to make the notification means active when the switching means is not operated. The structure to do is taken.

  According to this configuration, in addition to the effects of the invention according to any one of claims 1 to 4, various network switching modes can be selected, and a communication network can be flexibly selected according to user preferences. Can do.

  The mobile radio terminal apparatus according to claim 6 is the mobile radio terminal apparatus according to any one of claims 1 to 5, wherein the notification unit displays a notification for prompting switching of a communication network on a display unit. take.

  According to this configuration, in addition to the effects of the invention according to any one of claims 1 to 5, notification for allowing the user to select whether to switch the communication network can be appropriately performed.

  According to a seventh aspect of the present invention, the mobile radio terminal apparatus according to any one of the first to fifth aspects employs a configuration in which the notification means notifies the user of switching of the communication network by voice.

  According to this configuration, in addition to the effects of the invention according to any one of claims 1 to 5, notification for allowing the user to select whether to switch the communication network can be appropriately performed.

  As described above, according to the present invention, a mobile wireless terminal device that can be connected to a plurality of different wireless networks has various network switching modes, so that a flexible selection of a communication network can be made according to user preferences. be able to.

  The gist of the present invention is that various network switching modes can be selected in a mobile radio terminal apparatus that can be connected to a plurality of different radio networks.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
Mobile radio terminal apparatus 100 according to Embodiment 1 will be described using FIG.

  The mobile wireless terminal device 100 includes a cellular wireless interface 101, a public wireless LAN interface 102, a wireless power detection unit 103, a network switching control unit 104, a network switching display unit 105, a user selection unit 106, a switch unit 107, and a data signal processing unit 108. And a state selection unit 109. The wireless power detection unit 103 includes an area detection unit 1031. The network switching control unit 104 includes a characteristic comparison unit 1041.

  The cellular wireless interface 101 and the public wireless LAN interface 102 perform transmission / reception of radio waves in the cellular radio network and the public wireless LAN network, perform modulation of transmission signals, demodulation of reception signals, etc. 103. The wireless power detection unit 103 receives the received radio wave intensity from the cellular radio interface 101 and the public wireless LAN interface 102, and the area detection unit 1031 detects whether it is an area of each communication network from the received radio wave intensity and generates detection information. To do. When the network switching control unit 104 receives the detection information from the wireless power detection unit 103 and the detection information indicates that the mobile wireless terminal device 100 belongs to the areas of the cellular wireless network and the public wireless LAN network, A characteristic comparison unit 1041 compares the characteristics of the cellular wireless network and the public wireless LAN network.

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

  The network switching display unit 105 displays notification information received from the network switching control unit 104. This gives the user an opportunity to determine whether to switch communication networks. When the user selects either the cellular wireless network or the public wireless LAN network using the user selection unit 106, selection information is given 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 unit 107 switches a path of data transmitted from the network side and data generated by the mobile radio terminal device.

  The data signal processing unit 108 processes data sent from the network side via the switch unit 107 and data sent to the network side. The state selection unit 109 selects the mode of the mobile radio terminal apparatus 100. The mode selection unit 109 operates the network switching control unit 104 to automatically switch the communication network (automatic switching mode), and the network switching control unit 104 One mode can be selected from a mode (notification mode) for notifying the user to switch by operating and a mode for not operating the network switching control unit 104 (non-switching mode).

  An example of an integrated network 200 in which a cellular wireless network and a public wireless LAN network with which such mobile wireless terminal devices communicate is shown in FIG.

  The integrated network 200 includes a mobile wireless terminal device 100, a cellular wireless network 203, a public wireless LAN network 204, an Internet network 205, and a public telephone network 206. In FIG. 2, an area connectable with the cellular wireless network 203 is shown as a cellular wireless area 201, and an area connectable with 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 coupled by a heterogeneous network switching device 207. The mobile wireless terminal device 100 moves from the cellular wireless network 203 to the public wireless LAN network 204 and from the public wireless LAN network 204 as it moves. Switching to the cellular wireless network 203 can be performed seamlessly.

  The Internet 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 radio network 203 and the Internet network 205.

  FIG. 3 shows an image diagram of the mobile radio terminal apparatus 100. The mobile communication terminal apparatus 100 prompts a display unit 301, a speaker 302, a microphone 303, a radio wave status display 304 of a cellular wireless network, a radio wave status display 305 of a public wireless LAN network, a state selection button 306, a network selection button 307, and a network switching. Notification display 308.

  The user selects three modes using the state selection button 306. When the user selects the notification mode, when the mobile wireless terminal device 100 belongs to the cellular wireless area and the public wireless LAN network area, a notification display 308 for prompting network switching 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. The notification for prompting the network switching may be performed by voice from the speaker 302. Furthermore, the mobile radio terminal apparatus 100 may be configured to perform notification for prompting the network switching by vibration or light.

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

  When the mobile radio terminal apparatus 100 belongs only to the cellular radio area 201, the radio power detection unit 103 receives the received radio wave power only from the cellular radio interface 101, and belongs only to the cellular radio area 201 generated by the area detection unit 1031. Is provided to the network switching control unit 104. The network switching control unit 104 controls the switch unit 107 based on the detection information to switch the data path to the cellular wireless interface 101 side.

  When the mobile wireless terminal device 100 belongs to the cellular wireless area 201 and the public wireless LAN area 202, the wireless power detection unit 103 receives the received radio wave power from the cellular wireless interface 101 and the public wireless LAN interface 102, and the area detection unit 1031 Detection information indicating that it belongs to the public wireless LAN area 202 and the cellular wireless area 201 to be generated is given to the network switching control unit 104. When the characteristic comparison unit 1041 included in the network switching control unit 104 receives the detection information that it belongs to the public wireless LAN area 202 and the cellular wireless area 201, the characteristic comparison unit 1041 compares the characteristics of the public wireless LAN area 202 and the cellular wireless area 201. To generate a comparison result.

  The network switching control unit 104 determines that when the “predetermined condition” is satisfied, that is, the comparison result generated by the characteristic comparison unit 1041 is not the currently connected communication network (here, the public wireless LAN network) Control information is sent from the data signal processing unit 108 to the network side via the cellular radio interface 101 when the network switching procedure is indicated. . 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 gives 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 type item.

(1) Radio Wave Environment The characteristic comparison unit 1041 receives two received radio wave power values from the wireless power detection unit 103, that is, a received radio wave power value in the cellular radio interface 101 and a received radio wave power value in the public wireless LAN interface 102. Then, the characteristic comparison unit 1041 compares the received radio wave power values in the cellular wireless interface 101 and the public wireless LAN interface 102 to generate a comparison result.

  When the “predetermined condition” is satisfied, the network switching control unit 104 sends the information for instructing the network switching procedure to the network side from the data signal processing unit 108 to the cellular radio interface 101 as described above. To send to the network side. The “predetermined characteristic” in this case means that the received radio wave power value is large, that is, the radio wave environment is good.

(2) Communication cost The characteristic comparison 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.

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

(3) Bandwidth The characteristic comparison unit 1041 compares the bandwidth in each of the cellular wireless network 203 and the public wireless LAN network 204 and generates a comparison result.

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

(4) Execution Bandwidth The characteristic comparison unit 1041 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.

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

  In this case, in the mobile radio terminal apparatus 100, information on the effective bandwidth transmitted by the base station apparatus of the cellular radio network 203 and the base station apparatus of the public wireless LAN network 204 with which the mobile station communicates is transmitted to the mobile radio terminal. An effective bandwidth information acquisition unit (not shown) included in the apparatus 100 acquires the information via the cellular wireless interface 101 and the public wireless LAN interface 102 and supplies the acquired information to the network switching control unit 104. And the characteristic comparison part 1041 compares the effective bandwidth in each of the cellular radio | wireless network 203 and the public wireless LAN network 204 as above-mentioned, and produces | generates a comparison result.

(5) Application or Data Type The characteristic comparison unit 1041 displays information on the type of application operating in the data signal processing unit 108 or the data type processed in the data signal processing unit 108. Get from. Then, the characteristic comparison unit 1041 compares the line quality and generates a comparison result when the type of data processed by the data signal processing unit 108 is voice data.

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

  In addition, when the application operating in the data signal processing unit 108 is related to the Internet connection, the characteristic comparison unit 1041 compares the data capacity that can be transmitted and received and generates a comparison result.

  The network switching control unit 104 performs the same control as described above when the “predetermined condition” is satisfied. The “predetermined characteristic” in this case is a large data capacity that can be transmitted and received. Normally, since the public wireless LAN network has a larger data capacity that can be transmitted and received than the cellular wireless network, when the currently connected communication network is the cellular wireless network 203, the network switching control unit 104 moves the network switching procedure to the network side. Control is performed so that information for instructing is sent from the data signal processing unit 108 to the network side via the cellular wireless interface 101.

  Note that it is necessary to set in advance which of the above five characteristics items is 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, that is, an automatic switching mode, a notification mode, and a no-switching mode. By having a function that can be changed according to preferences and situations, various communication modes and service enjoyment modes can be flexibly supported according to user preferences and situations.

(Embodiment 2)
Mobile radio terminal apparatus 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 state selection unit 402, a moving speed detection unit 403, a cellular wireless interface 101, a public wireless LAN interface 102, a wireless power detection unit 103, a network switching display unit 105, and a user selection unit. 106, a switch 107, and a data signal processing unit 108. The network switching control unit 401 includes a speed comparison unit 4011 and a characteristic comparison unit 4012.

  The moving speed detector 403 detects the moving speed of the mobile radio terminal device 400 and generates moving speed information. As the method, for example, the moving speed detection unit 403 includes a GPS (Global Positioning System) receiving device, acquires position information of the mobile radio terminal device 400 at regular time intervals, and moves within a certain time from the position information. And calculate the speed by dividing the distance by a certain time. The network switching control unit 401 receives the movement speed information of the mobile communication terminal device 400 from the movement speed detection unit 403, and the speed comparison unit 4011 compares it with a predetermined threshold value. As a result of the comparison, when the moving speed is equal to or higher than the threshold, the network switching control unit 401 controls the switch unit 107 to preferentially switch the data path to the cellular wireless interface 101 side.

  On the other hand, when the moving speed is less than the threshold value as a result of the comparison, the characteristic comparison unit 4012 compares the characteristics of the cellular wireless network and the public wireless LAN network. As a result of comparing the characteristics, when the communication network that is not currently connected has “predetermined characteristics” and the selection mode described later is the automatic speed switching mode, the network switching control unit 401 Switch to a communication network with “predetermined characteristics”. The state selection unit 402 selects the mode of the mobile radio terminal device 400. When the moving speed is equal to or higher than the threshold, the mode selection unit 402 preferentially switches the communication network to the cellular radio network (speed automatic switching mode), and One mode can be selected from a mode for notifying switching (notification mode) or a mode for not operating the network switching control unit 401 (non-switching mode).

  The reason for adopting such a configuration is as follows. For example, if the mobile wireless terminal device has a high moving speed and enters the wireless LAN network area while communicating via a cellular wireless network, the wireless LAN network will be the diameter of the area even if the communication network is switched. However, since it is narrow from several tens of meters to 300 meters, it immediately leaves the area and returns to the original cellular wireless network, so there is little merit in switching the communication network to the wireless LAN network. When the moving speed is slow, such as walking, it takes a certain amount of time to get out of the wireless LAN area, so there are many advantages of switching the communication network to the wireless LAN network (for example, high-speed data communication is possible).

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

  When the mobile radio terminal device 400 belongs only to the cellular radio area 201, the radio power detection unit 103 receives the received radio wave power only from the cellular radio interface 101, and belongs only to the cellular radio area 201 generated by the area detection unit 1031. Is provided to the network switching control unit 401. The network switching control unit 401 controls the switch unit 107 based on the detection information to switch the data path to the cellular wireless interface 101 side. When only belonging to the cellular radio area 201, the above operation is performed regardless of whether the moving speed is equal to or higher than the threshold value.

  When the mobile wireless terminal device 400 belongs to the cellular wireless area 201 and the public wireless LAN area 202, the wireless power detection unit 103 receives the received radio wave power from the cellular wireless interface 101 and the public wireless LAN interface 102, and the area detection unit 1031 Detection information indicating that it belongs to the public wireless LAN area 202 and the cellular wireless area 201 to be generated is given to the network switching control unit 401. Then, the network switching control unit 401 receives the movement speed information of the mobile communication terminal device 400 from the movement speed detection unit 403, and the speed comparison unit 4011 compares it with a predetermined threshold value.

  As a result of the comparison, when the moving speed is equal to or higher than the threshold, the network switching control unit 401 controls the switch unit 107 to preferentially switch the data path to the cellular wireless interface 101 side. In this case, since the data path is originally switched to the cellular radio interface 101 side, no special operation is involved.

  On the other hand, when the moving speed is less than the threshold value as a result of the comparison, the characteristic comparison unit 4012 compares the characteristics of the cellular wireless network 203 and the public wireless LAN network 204. When the network switching control unit 401 satisfies the “predetermined condition”, that is, as a result of comparing the characteristics, the public wireless LAN network 204 that is not the currently connected communication network has the “predetermined characteristics”. Is switched to the public wireless LAN network 204. However, even while belonging to the public wireless LAN area 202, the network switching control unit 401 controls the switch unit 107 when the moving speed of the mobile wireless terminal device 400 after a certain time is equal to or higher than the threshold value. The data path is preferentially switched to the cellular wireless interface 101 side.

  Here, as in the first embodiment, the characteristic comparison 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 for the item of application or data type.

(1) Radio Wave Environment The characteristic comparison unit 4012 receives from the wireless power detection unit 103 two received radio wave power values, that is, a received radio wave power value in the cellular radio interface 101 and a received radio wave power value in the public wireless LAN interface 102. Then, the characteristic comparison unit 4012 compares the received radio wave power values in the cellular wireless interface 101 and the wireless LAN interface 102 and generates a comparison result.

  When the “predetermined condition” is satisfied, the network switching control unit 401 sends the information for instructing the network switching procedure to the network side from the data signal processing unit 108 to the cellular radio interface 101 as described above. To send to the network side. The “predetermined characteristic” in this case means that the received radio wave power value is large, that is, the radio wave environment is good.

(2) Communication cost The characteristic comparison unit 4012 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.

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

(3) Bandwidth The characteristic comparison unit 4012 compares the bandwidth in each of the cellular wireless network 203 and the public wireless LAN network 204 to generate a comparison result.

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

(4) Execution Bandwidth The characteristic comparison unit 4012 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.

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

  In this case, in the mobile radio terminal apparatus 100, information on the effective bandwidth transmitted by the base station apparatus of the cellular radio network 203 and the base station apparatus of the public wireless LAN network 204 with which the mobile station communicates is transmitted to the mobile radio terminal. An effective bandwidth information acquisition unit (not shown) included in the apparatus 100 acquires the information via the cellular wireless interface 101 and the public wireless LAN interface 102 and supplies the acquired information to the network switching control unit 401. And the characteristic comparison part 4012 compares the effective bandwidth in each of the cellular wireless network 203 and the public wireless LAN network 204 as above-mentioned, and produces | generates a comparison result.

(5) Application or Data Type The characteristic comparison unit 4012 displays information on 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. Get from. Then, the characteristic comparison unit 4012 generates a comparison result by comparing the line quality when the type of data processed by the data signal processing unit 108 is voice data.

  The network switching control unit 401 performs the same control as described above when the “predetermined condition” is satisfied. In this case, the “predetermined characteristic” means that the line quality is good. Normally, the cellular wireless network has better line quality than the public wireless LAN network. Therefore, when the currently connected communication network is the cellular wireless network 203, the network switching control unit 401 does not involve any special operation.

  The characteristic comparison unit 4012 generates a comparison result by comparing data capacities that can be transmitted and received when the application operating in the data signal processing unit 108 relates to the Internet connection.

  The network switching control unit 401 performs the same control as described above when the “predetermined condition” is satisfied. The “predetermined characteristic” in this case is a large data capacity that can be transmitted and received. Normally, since the public wireless LAN network has a larger data capacity that can be transmitted and received than the cellular wireless network, when the currently connected communication network is the cellular wireless network 203, the network switching control unit 401 changes the network switching procedure to the network side. Control is performed so that information for instructing is sent from the data signal processing unit 108 to the network side via the cellular wireless interface 101.

  Note that it is necessary to set in advance which of the above-described five characteristics items the network switching control unit 401 and the characteristic comparison unit 4012 are to operate.

  When the mode of the mobile radio terminal device 400 is the notification mode, when the network switching control unit 401 automatically switches, specifically when the moving speed is greater than or equal to the threshold, and the moving speed Is less than the threshold, and as a result of comparing the characteristics of the cellular wireless network 203 and the public wireless LAN network 204, the public wireless LAN network 204 that is not the currently connected communication network has a predetermined characteristic. Instead of automatically switching the communication network, the user is notified of network switching.

  As described above, according to the second embodiment of the present invention, the mobile radio terminal device 400 has three switching modes, that is, the automatic speed switching mode, the notification mode, and the no switching mode, and this switching mode is selected by the user. By having a function that can be selected according to the user's preference and situation, various communication modes and service reception modes can be flexibly supported according to the user's preference and situation. Moreover, 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 radio terminal device.

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

  The mobile wireless terminal device 500 includes a network switching control unit 501, a state selection unit 502, a cellular wireless interface 101, a public wireless LAN interface 102, a wireless power detection 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 includes an area detection unit 1031. The network switching control unit 501 includes a characteristic comparison unit 1041, a speed comparison unit 4011, and a characteristic comparison unit 4012. That is, mobile radio terminal apparatus 500 employs a configuration in which mobile radio terminal apparatus 100 according to Embodiment 1 and mobile radio terminal apparatus 400 according to 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), a mode for preferentially switching the communication network to the cellular wireless network when the moving speed is equal to or higher than the threshold (speed automatic switching mode), a user One mode can be selected from a mode (notification mode) for notifying the user of switching and a mode not operating the network switching control unit 501 (non-switching mode).

  As described above, according to Embodiment 3 of the present invention, mobile radio terminal apparatus 500 has four switching modes, that is, an automatic switching mode, a speed automatic switching mode, a notification mode, and a no-switching mode. By having the function of selecting the switching mode 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. Moreover, 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 radio terminal device.

  It is a mobile radio terminal apparatus that can be connected to a plurality of different radio networks, and is useful as a mobile radio terminal apparatus that can select various network switching modes according to user preferences.

FIG. 2 is a block diagram showing a configuration of a mobile radio terminal apparatus according to Embodiment 1 of the present invention. Diagram showing an example of an integrated network Fig. 3 is an image diagram of a mobile radio terminal apparatus according to Embodiment 1 of the present invention. Block diagram showing a configuration of a mobile radio terminal apparatus according to Embodiment 2 of the present invention The block diagram which shows the structure of the mobile communication terminal device of the aspect which combined the structure of the mobile radio | wireless terminal apparatus which concerns on Embodiment 3 of this invention.

Explanation of symbols

100, 400, 500 Mobile wireless terminal device 101 Cellular wireless interface 102 Public wireless LAN interface 103 Wireless power detection unit 1031 Area detection unit 104, 401, 501 Network switching control unit 1041, 4012 Characteristic comparison unit 105 Network switching display unit 106 User selection Unit 107 switch unit 108 data signal processing unit 109, 402, 502 state selection unit 201 cellular wireless area 202 public wireless LAN area 203 cellular wireless network 204 public wireless LAN network 205 internet network 206 public telephone network 207 heterogeneous network switching device 301 display unit 302 Speaker 303 Microphone 304 Radio wave status display of cellular wireless network 305 Public wireless LAN network power Notification display 401 network switching control unit 4011 speed comparing unit 403 moving speed detecting unit for prompting status display 306 state selection button 307 network selection button 308 Network Switch

Claims (7)

In a mobile wireless terminal device connectable to a cellular wireless network and a public wireless LAN network,
Area detecting means for detecting whether or not each of the areas of the cellular wireless network and the public wireless LAN network belongs to each area and generating a detection result;
A characteristic comparison unit that compares the characteristics of the cellular wireless network and the public wireless LAN network to generate a comparison result when the detection result indicates that the detection result belongs to an area of the cellular wireless network and the public wireless LAN network When,
Switching means for switching to either the cellular wireless network or the public wireless LAN network having a predetermined characteristic according to the comparison result;
A notification means for notifying whether to switch to either the cellular wireless network or the public wireless LAN network having a predetermined characteristic according to the comparison result;
A mobile wireless terminal apparatus comprising: selection means for selecting either the cellular wireless network or the public wireless LAN network based on the notification.   2. The mobile radio terminal apparatus according to claim 1, wherein the predetermined characteristic includes a bandwidth, a low communication cost, a network availability, or a large number of service applications. Having a moving speed detecting means for detecting the moving speed of the mobile radio terminal device;
3. The mobile radio terminal apparatus according to claim 1, wherein the notification unit issues a notification prompting selection of the cellular radio network as a communication network when the moving speed is equal to or higher than a threshold value. Having a moving speed detecting means for detecting the moving speed of the mobile radio terminal device;
The mobile radio terminal apparatus according to claim 1 or 2, wherein the switching unit preferentially switches to the cellular radio network as a communication network when the moving speed is equal to or higher than a threshold value. Comprising a state selection means for selecting a state of the mobile radio terminal device;
The state selection means includes: a first selection means for selecting whether or not the switching means is in an operating state;
5. The apparatus according to claim 1, further comprising: a second selection unit configured to select whether or not the notification unit is to be activated when the switching unit is not activated. Mobile radio terminal equipment.   The mobile radio terminal apparatus according to claim 1, wherein the notification unit displays a notification that prompts switching of a communication network on a display unit.   The mobile radio terminal apparatus according to claim 1, wherein the notification unit notifies the user of switching of the communication network by voice.

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