JP2018182605A - Wireless communication system - Google Patents

Abstract

A wireless communication system is provided that enables wireless communication between mobile terminals without depending on the environment in which they are used. A wireless communication system (10) includes a plurality of mobile terminals (20) belonging to a predetermined group and capable of direct wireless communication with each other. 1 detection unit 22, a first setting unit 24 for setting, as a first access point, a mobile terminal 20C having a predetermined number or more of connectable terminals among the plurality of mobile terminals 20, a second detection unit 26 for detecting a mobile terminal 20F that cannot be directly connected to the first access point and a mobile terminal 20D that can be directly connected to the first access point from among the mobile terminals 20 that can be connected to the first access point; and a second setting unit 28 for setting the detected connectable mobile terminal 20D as a second access point. [Selection drawing] Fig. 2

Description

  The present invention relates to a wireless communication system.

  BACKGROUND In recent years, portable terminals capable of wireless communication, such as smartphones and tablets, are in widespread use. In these portable terminals, wireless communication is performed by wireless LAN, Bluetooth (registered trademark) or the like. For example, in Patent Document 1, a mobile terminal having the best radio wave environment of a mobile phone network among a plurality of mobile phone terminals is a master, and the other mobile terminals are mutually connected by ad hoc communication of a wireless LAN as a slave. Technology is disclosed.

Patent No. 5239879

  By the way, for example, when communicating with each other using a voice call application or the like in a portable terminal, it is necessary to log in to the server via the Internet. When the portable terminal is used in an environment where it moves, the communication with the server may be interrupted, and as a result, it may not be possible to communicate with each other. In this case, it is necessary to log in to the server again, which is cumbersome. Under circumstances where it is not possible to connect to the Internet, the voice call application etc. can not be used. The technology described in Patent Document 1 assumes that a mobile phone terminal is connected to a mobile phone network, and does not consider communication between mobile terminals when the mobile phone terminal is not connected. Also, with Bluetooth (registered trademark) voice connection, for example, in the case of a motorbike as a portable terminal, it is only possible to support communication over a relatively short distance, such as a conversation with a person on the back seat. Thus, wireless communication between portable terminals is greatly affected by the surrounding environment, such as whether it can be connected to the Internet.

  The present invention has been made in view of the foregoing, and an object thereof is to provide a wireless communication system capable of wirelessly communicating between portable terminals without depending on an environment at the time of use.

  The wireless communication system according to the present invention is a wireless communication system including a plurality of mobile terminals belonging to a predetermined group and capable of wireless communication with each other, wherein the mobile terminals are the plurality of mobile terminals in the group. When one of the terminals is a main portable terminal and the portable terminal excluding the main portable terminal is a sub portable terminal, the number of connectable terminals in which the main portable terminal and the sub portable terminal can be directly connected The first access point for detecting each of the mobile terminals and any one of the mobile terminals having the predetermined number of connectable terminals among the plurality of mobile terminals are set as the first access point Of the first setting unit to be connected and the portable terminal directly connectable to the first access point, direct connection to the portable terminal not directly connectable to the first access point is possible It comprises a second detector for detecting said mobile terminal, and a second setting unit for setting said connectable mobile terminal detected by the second detector to the second access point, a.

  According to the wireless communication system of the present invention, a plurality of mobile terminals belonging to a predetermined group are configured to be able to wirelessly communicate with each other. For this reason, they can communicate with each other even in an environment where they can not connect to the Internet. Further, the first setting unit sets any one of the portable terminals having the predetermined number of connectable terminals or more as the first access point. Thus, portable terminals connectable to the first access point can communicate with each other via the first access point. Further, the second setting unit sets, as the second access point, a portable terminal directly connectable to the first access point. Here, the second access point can be directly connected to a mobile terminal that can not be directly connected to the first access point. For this reason, the portable terminal capable of directly connecting to the first access point communicates with the portable terminal capable of directly connecting to the second access point via the first access point and the second access point. Can. Thus, since a plurality of access points are set in a group, communication between portable terminals can be performed more smoothly.

  According to the present invention, it is possible to provide a wireless communication system capable of performing wireless communication between portable terminals without depending on the environment at the time of use.

It is a schematic diagram of the radio | wireless communications system which concerns on one Embodiment. It is a block diagram of a portable terminal concerning one embodiment. It is the flow chart which showed the procedure which connects a plurality of personal digital assistants concerning one embodiment. It is a schematic diagram which shows the connection relation of the 1st portable terminal which concerns on one Embodiment. It is a schematic diagram which shows the connection relation of the portable terminals which concern on one Embodiment. It is a schematic diagram which shows the connection relation of the portable terminals which concern on one Embodiment. It is a schematic diagram of the radio | wireless communications system which concerns on other one Embodiment. It is a block diagram of the portable terminal concerning other one embodiment. It is the flowchart which showed the procedure which connects the some portable terminal which concerns on other one Embodiment.

  Hereinafter, embodiments of a wireless communication system according to the present invention will be described with reference to the drawings. The embodiments described herein are, of course, not intended to specifically limit the present invention. In addition, the same reference numerals are given to the members and portions that exert the same action, and the overlapping description will be omitted or simplified.

First Embodiment
As shown in FIG. 1, the wireless communication system 10 includes a first portable terminal 20A to a sixth portable terminal 20F (hereinafter, these may be collectively referred to simply as the portable terminal 20). The first portable terminal 20A to the sixth portable terminal 20F are configured to be capable of wireless communication with each other. For example, the first portable terminal 20A to the sixth portable terminal 20F are configured to be capable of direct wireless communication with each other without via a base station located at a predetermined location. The first portable terminal 20A to the sixth portable terminal 20F are connected by, for example, a wireless LAN. The first portable terminal 20A to the sixth portable terminal 20F mutually communicate, for example, in the ad hoc mode. A common group code is preset in each of the first portable terminal 20A to the sixth portable terminal 20F, and belongs to the same group. Thereby, it is possible to distinguish the other portable terminals not belonging to the group from the first portable terminal 20A to the sixth portable terminal 20F. An ID code is preset in each of the first portable terminal 20A to the sixth portable terminal 20F, and each device can be specified. Examples of the mobile terminal 20 include devices that can be used while moving, such as a smartphone and a tablet. The portable terminal 20 may be a device such as a self-propelled cleaning robot or a portable printer that transmits and receives data other than voice data.

  As shown in FIG. 2, the portable terminal 20 includes a transmitter 21A, a receiver 21B, a response unit 21C, a first detector 22, a first setting unit 24, a second detector 26, and a second detector 26. The setting unit 28, the determination unit 30, the notification unit 32, the conversion unit 34, the connection detection unit 36, the connection unit 38, and the group reconstruction unit 40 are provided. These units are realized by programs. This program is downloaded, for example, through the Internet. Also, these units may be realized by a processor, a circuit, and the like. In addition, the specific control of each part mentioned above etc. is mentioned later.

  The transmitter 21A broadcasts a connection confirmation signal to each mobile terminal 20. That is, the transmitter 21A broadcasts a connection confirmation signal to all the mobile terminals 20 belonging to the same group.

  The receiving unit 21B receives a connection confirmation signal broadcasted from another mobile terminal 20. In addition, the receiving unit 21B receives an answer back signal, which will be described later, transmitted from another portable terminal 20.

  When the connection confirmation signal is received by the reception unit 21B, the response unit 21C transmits a signal (answer back signal) indicating that the connection confirmation signal has been received to the portable terminal 20 that has broadcast the connection confirmation signal.

  FIG. 3 is a flowchart showing a procedure for connecting the first portable terminal 20A to the sixth portable terminal 20F. Hereinafter, a procedure for connecting the first portable terminal 20A to the sixth portable terminal 20F will be described.

  In step S <b> 10, the first detection unit 22 detects the number of connectable terminals for each mobile terminal 20. In the present embodiment, the first detection unit 22 detects the number of connectable terminals of the first portable terminal 20A to the sixth portable terminal 20F. The number of connectable terminals is the number of portable terminals 20 to which the main portable terminal and the sub portable terminal can be directly connected. The number of connectable terminals is usually a number that changes when the positional relationship between the first portable terminal 20A to the sixth portable terminal 20F is changed. The main mobile terminal is one of the plurality of mobile terminals 20 in the group, and the sub mobile terminal is the remaining mobile terminals excluding the main mobile terminal from the plurality of mobile terminals 20 in the group. is there. In the example shown in FIG. 4, the first portable terminal 20A is the main portable terminal, and the second to sixth portable terminals 20B to 20F are sub portable terminals. If the communication quality between the main portable terminal and the sub portable terminal does not meet the predetermined level, it may be determined that the main portable terminal and the sub portable terminal can not be connected directly. Good.

  As indicated by an arrow A1 in FIG. 4, the transmission unit 21A of the first portable terminal 20A broadcasts a connection confirmation signal to the second portable terminal 20B to the sixth portable terminal 20F. Then, when the receiving unit 21B of the second mobile terminal 20B and the third mobile terminal 20C receives the connection confirmation signal, as shown by arrow A2 in FIG. 4, the response unit 21C of the second mobile terminal 20B and the third mobile terminal 20C. Sends an answer back signal to the first portable terminal 20A. In this example, since the first mobile terminal 20A receives the answer back signal from the second mobile terminal 20B and the third mobile terminal 20C, the first mobile terminal 20A receives the second mobile terminal 20B and the third mobile terminal 20B. It is detected that the terminal 20C can be connected. On the other hand, since the first mobile terminal 20A does not receive the answer back signal from the fourth mobile terminal 20D to the sixth mobile terminal 20F, the first mobile terminal 20A is the fourth mobile terminal 20D to the sixth mobile terminal 20F. And can not be connected. Thus, the first detection unit 22 detects that the number of connectable terminals of the first portable terminal 20A is two. The first detection unit 22 detects the number of connectable terminals of each of the second portable terminal 20B to the sixth portable terminal 20F as described above.

  As shown in FIG. 5, in the present embodiment, the first detection unit 22 has two connectable terminals of the first mobile terminal 20A and two connectable terminals of the second mobile terminal 20B. The number of connectable terminals of the three mobile terminals 20C is 4, the number of connectable terminals of the fourth mobile terminal 20D is 2, the number of connectable terminals of the fifth mobile terminal 20E is 1, and the number of connectable terminals of the sixth mobile terminal 20F It detects that the number of connectable terminals is one.

  In step S20, the first setting unit 24 determines that the number of connectable terminals detected by the first detection unit 22 is a predetermined number or more (preferably, two or more) from among the first mobile terminal 20A to the sixth mobile terminal 20F. ) Is set as the first access point. Since the first access point is the portable terminal 20, it is movable (position changeable). In the present embodiment, the first setting unit 24 sets the third mobile terminal 20C having the largest number of connectable terminals as the first access point. The first setting unit 24 may set the portable terminal 20 other than the third portable terminal 20C as the first access point. The first setting unit 24 transmits, to the third mobile terminal 20C, an instruction signal to connect to the first mobile terminal 20A, the second mobile terminal 20B, the fourth mobile terminal 20D, and the fifth mobile terminal 20E. Thereby, for example, the first portable terminal 20A can mutually wirelessly communicate with the fourth portable terminal 20D via the third portable terminal 20C.

  In step S30, first, the second detection unit 26 can directly connect the portable terminal 20 that can not be directly connected to the first access point among the portable terminals 20 that can be directly connected to the first access point The portable terminal 20 is detected. In the present embodiment, the second detection unit 26 is a first portable terminal 20A, a second portable terminal 20B, and a fourth portable terminal 20 that are portable terminals 20 that can be directly connected to the third portable terminal 20C that is the first access point. Among the terminal 20D and the fifth portable terminal 20E, the fourth portable terminal 20D is detected as the portable terminal 20 directly connectable to the sixth portable terminal 20F which can not be directly connected to the third portable terminal 20C. At this time, the third mobile terminal 20C inquires of the first mobile terminal 20A, the second mobile terminal 20B, the fourth mobile terminal 20D, and the fifth mobile terminal 20E whether connection with the sixth mobile terminal 20F is possible. Send a signal. Then, the fourth portable terminal 20D returns a signal indicating that the connection is possible to the third portable terminal 20C.

  The second setting unit 28 sets the fourth portable terminal 20D detected by the second detection unit 26 as a second access point. Since the second access point is the portable terminal 20, it is movable (position changeable). The second setting unit 26 transmits, to the fourth portable terminal 20D, an instruction signal to connect to the third portable terminal 20C and the sixth portable terminal 20F. Thereby, for example, the first portable terminal 20A can mutually wirelessly communicate with the sixth portable terminal 20F via the third portable terminal 20C and the fourth portable terminal 20D. When a signal indicating that the connection is possible is transmitted from two or more mobile terminals 20, for example, the smaller one of the terminal numbers may be set as the second access point.

  In step S40, the determination unit 30 determines whether all the mobile terminals 20 in the group can communicate with each other wirelessly via the first access point and the second access point. In the present embodiment, the determination unit 30 determines whether or not the first portable terminal 20A to the sixth portable terminal 20F can wirelessly communicate with each other via the third portable terminal 20C and the fourth portable terminal 20D. If all the mobile terminals 20 can wirelessly communicate with each other, the process proceeds to step S50. On the other hand, when some mobile terminals 20 can not communicate by radio, the process proceeds to step S60. When the portable terminal 20 becomes incapable of wireless communication, the case where the distance to the other portable terminal 20 is relatively long, the case where an obstacle exists to the other portable terminal 20, or the portable terminal 20 Sometimes the battery is dead.

  In step S50, the notification unit 32 notifies that all the portable terminals 20 can communicate wirelessly, when the determination unit 30 determines that the portable terminals 20 that can not communicate wirelessly exist in the group. FIG. 1 is an example of the case where the first portable terminal 20A to the sixth portable terminal 20F can wirelessly communicate with each other. The notification unit 32 notifies all of the first to sixth portable terminals 20A to 20F that all the portable terminals 20 can wirelessly communicate. Thereby, the connection process of portable terminal 20 comrades is complete | finished. Although the method of notification by the notification unit 32 is not particularly limited, for example, notification is performed by voice.

  In step S60, when the determining unit 30 determines that the portable terminal 20 incapable of wireless communication exists in the group, the notifying unit 32 notifies the portable terminal 20 incapable of wireless communication. FIG. 6 is an example of the case where the fifth mobile terminal 20E can not wirelessly communicate with any mobile terminal 20. In the example illustrated in FIG. 6, the notification unit 32 notifies the first portable terminal 20A to the fourth portable terminal 20D and the sixth portable terminal 20F that the fifth portable terminal 20E can not perform wireless communication.

  In step S70, it is determined by the determination unit 30 that there are portable terminals 20 incapable of wireless communication in the group, so the connection detection unit 36 can not perform wireless communication at predetermined time intervals (for example, 1 second to 5 seconds). It is detected whether the portable terminal 20 can connect directly or indirectly to the first access point. The connection detection unit 36 detects whether the portable terminal 20 that can not communicate wirelessly can communicate with any of the portable terminals 20 that can communicate wirelessly in the group. The connection detection unit 36 causes the transmission unit 21A of each portable terminal 20 to broadcast a connection confirmation signal to the portable terminal 20 incapable of wireless communication, and to receive an answer back signal from the portable terminal 20 incapable of wireless communication. To detect. When it is detected by the connection detection unit 36 that the connection of the portable terminal 20 which has been incapable of wireless communication is possible, the process proceeds to step S80. On the other hand, when it is not detected by the connection detection unit 36 that the connection of the portable terminal 20 which has been incapable of wireless communication is possible, the process proceeds to step S100.

  In step S80, the connection unit 38 directly or indirectly connects the connectable portable terminal 20 detected by the connection detection unit 36 to the first access point. In the example shown in FIG. 6, when the fifth mobile terminal 20E can be connected to the third mobile terminal 20C, the connection unit 38 connects the third mobile terminal 20C to the fifth mobile terminal 20E. Send an instruction signal. When the fifth mobile terminal 20E can be connected to the fourth mobile terminal 20D, the connection unit 38 transmits an instruction signal to the fourth mobile terminal 20D to connect to the fifth mobile terminal 20E. . On the other hand, when the fifth mobile terminal 20E can be connected to any of the first mobile terminal 20A, the second mobile terminal 20B, and the sixth mobile terminal 20F, the connection unit 38 transmits the connectable mobile terminal 20 to the connectable mobile terminal 20, An instruction signal is transmitted to connect to the fifth mobile terminal 20E. That is, the portable terminal 20 to which the instruction signal has been transmitted is set as a new access point.

  In step S90, the notification unit 32 notifies that the portable terminal 20 which has been unable to perform wireless communication has been connected. In the example illustrated in FIG. 6, the notification unit 32 indicates that the wireless communication is enabled between the fifth mobile terminal 20 </ b> E and one of the mobile terminals 20 in the group. It notifies to the fourth portable terminal 20D and the sixth portable terminal 20F. Thereby, the connection process of portable terminal 20 comrades is complete | finished.

  In step S100, the determination unit 30 determines that the time during which the wireless terminal 20 in the group can not connect directly or indirectly to the first access point has exceeded a predetermined time (for example, 10 seconds to 30 seconds). Determine if If the predetermined time or more has not elapsed, the process returns to step S70. On the other hand, when a predetermined time or more has elapsed, the process proceeds to step S110.

  In step S110, the group restructuring unit 40 excludes the portable terminal 20 incapable of wireless communication from the group. For example, in the example shown in FIG. 6, when the fifth mobile terminal 20E can not connect directly or indirectly to the third mobile terminal 20C, which is the first access point, for a predetermined time or more, the group restructuring unit 40 The fifth mobile terminal 20E is excluded from the group. Thereby, the connection process of portable terminal 20 comrades is complete | finished. The mobile terminals 20 excluded from the group can be registered in the group again by the user.

  The converter 34 mutually converts the first voice in the first language and the second voice in the second language when voice transmission / reception is performed between the first portable terminal 20A to the sixth portable terminal 20F in the group. Do. Examples of the conversion unit 34 include translation software. For example, the first language may be Japanese, and the second language may be English, but the present invention is not limited to these languages, and can be applied to translation between all languages.

  As described above, according to the wireless communication system 10 of the present embodiment, the plurality of mobile terminals 20 belonging to the predetermined group are configured to be able to wirelessly communicate with each other. For this reason, they can communicate with each other even in an environment where they can not connect to the Internet. In addition, the first setting unit 24 sets, as the first access point, the third mobile terminals 20C whose number of connectable terminals is equal to or more than a predetermined number. Thereby, the first portable terminal 20A, the second portable terminal 20B, the fourth portable terminal 20D, and the fifth portable terminal 20E, which are portable terminals 20 connectable to the first access point, are mutually connected via the first access point. It can communicate. In addition, the second setting unit 28 sets, as a second access point, a fourth portable terminal 20D that can be directly connected to the first access point. Here, the second access point can be directly connected to the sixth mobile terminal 20F which can not be directly connected to the first access point. Therefore, the first mobile terminal 20A, the second mobile terminal 20B, the fourth mobile terminal 20D, and the fifth mobile terminal 20E that can be directly connected to the first access point can be directly connected to the second access point. The sixth mobile terminal 20F can communicate with each other via the first access point and the second access point. As described above, since a plurality of access points are set in the group, communication between portable terminals 20 can be performed more smoothly.

  In the wireless communication system 10 according to the present embodiment, when the determining unit 30 determines that the portable terminals 20 that can not communicate wirelessly exist in the group, the notifying unit 32 can communicate wirelessly with all the portable terminals 20. Notify that. As a result, it is possible to recognize that the user using each portable terminal 20 can communicate among all the portable terminals 20 in the group. In addition, when the determination unit 30 determines that the portable terminal 20 incapable of wireless communication exists in the group, the notification unit 32 notifies the portable terminal 20 incapable of wireless communication. Thereby, the user using each portable terminal 20 can recognize which portable terminal 20 in the group can not communicate.

  In the wireless communication system 10 of the present embodiment, when the determination unit 30 determines that the portable terminal 20 incapable of wireless communication is present in the group, the connection detection unit 36 is configured to disable portable communication in wireless communication at predetermined time intervals. It detects whether the terminal 20 can connect directly or indirectly to the first access point. When the portable terminal 20 is used in a moving environment, even if communication with other portable terminals 20 in the group is not possible at a certain time, the positional relationship between the portable terminals 20 changes with the passage of time, There are cases where it can be connected directly to the mobile terminal 20. For this reason, the connection detection unit 36 detects the connection status of the portable terminal 20 incapable of wireless communication at predetermined time intervals. Then, the connection unit 38 directly or indirectly connects the connectable portable terminal 20 detected by the connection detection unit 36 to the first access point. As a result, the user using each portable terminal 20 can communicate with the portable terminal 20 which has not been able to connect.

  In the wireless communication system 10 according to the present embodiment, the converter 34 transmits the first voice in the first language and the second voice in the second language when transmission and reception of voices are performed between the plurality of mobile terminals 20 in the group. Convert each other. This enables multi-lingual conversations between users.

  In the wireless communication system 10 of the present embodiment, the first setting unit 24 sets the mobile terminal 20 having the largest number of connectable terminals among the plurality of mobile terminals 20 as the first access point. Thereby, many portable terminals 20 can be connected to the portable terminal 20 set as the first access point, and the portable terminal 20 existing near the portable terminal 20 set as the first access point is the first It is directly connected to the portable terminal 20 set as the access point. As the number of portable terminals 20 connected to the portable terminal 20 set as the first access point without passing through the other portable terminals 20 increases, it is possible to suppress a situation where the communication network is unnecessarily long. In addition, as the communication network becomes shorter (that is, the number of portable terminals 20 passed through decreases), the communication efficiency is improved.

  In the wireless communication system 10 according to the present embodiment, the group restructuring unit 40 can not perform wireless communication if the mobile terminal 20 incapable of wireless communication in the group can not connect directly or indirectly to the first access point for a predetermined time or more. Mobile terminals 20 are excluded from the group. If the distance between the portable terminals 20 is relatively long, if there is an obstacle between the portable terminals 20, or if the battery of the portable terminal 20 is exhausted, wireless communication can not be performed. If wireless communication can not be performed even after a predetermined time has elapsed, it is possible to omit a procedure such as reconnection by excluding from the group, and it is possible to suppress the consumption of the battery of each portable terminal 20.

  In the wireless communication system 10 of the present embodiment, when the communication quality between the main portable terminal and the sub portable terminal does not reach a predetermined level, the first detection unit 22 directly connects the main portable terminal and the sub portable terminal. It may be determined that the relationship is not possible. Thereby, the connection relationship inferior to communication quality can be excluded in advance.

  In the wireless communication system 10 of the present embodiment, the portable terminal 20 may be a self-propelled cleaning robot. By exchanging data between cleaning robots, it is possible to share work and realize optimum cleaning.

  In the wireless communication system 10 of the present embodiment, the portable terminal 20 may be a portable printer. By exchanging data between portable printers, it is possible to share work and realize optimal printing.

Second Embodiment
As shown in FIG. 7, the wireless communication system 110 includes a first portable terminal 20A to an eighth portable terminal 20H (hereinafter, these may be collectively referred to simply as the portable terminal 20). The first portable terminal 20A to the eighth portable terminal 20H are configured to be capable of wireless communication with each other. For example, the first portable terminal 20A to the eighth portable terminal 20H are configured to be capable of direct wireless communication with each other without via a base station located at a predetermined location. The first portable terminal 20A to the eighth portable terminal 20H are connected by, for example, a wireless LAN. A common group code is preset in each of the first portable terminal 20A to the eighth portable terminal 20H, and belongs to the same group. An ID code is preset in each of the first portable terminal 20A to the eighth portable terminal 20H, and each device can be specified. In the example shown in FIG. 7, the seventh mobile terminal 20G and the eighth mobile terminal 20H are in such a positional relationship that they can be connected only to the sixth mobile terminal 20F.

  As shown in FIG. 8, the portable terminal 120 includes a transmitter 21A, a receiver 21B, a response unit 21C, a first detector 22, a first setting unit 24, a second detector 26, and a second detector 26. The setting unit 28, the determination unit 130, the notification unit 32, the conversion unit 34, the connection detection unit 36, the connection unit 38, the group reconstruction unit 40, the third detection unit 42, and the third setting unit 44 And have.

  FIG. 9 is a flowchart showing a procedure for connecting the first portable terminal 20A to the eighth portable terminal 20H. It should be noted that after step S30, step S35 is included and step S40 is replaced by step S45 and first portable terminal 20A to sixth portable terminal 20F are replaced by first portable terminal 20A to eighth portable terminal 20H. Since the same processing as the flowchart according to the first embodiment is performed except for the above, the redundant description will be omitted.

  In step S35, first, the third detection unit 42 directly communicates with the first access point and the second access point out of the portable terminals 20 that can be indirectly connected to the first access point via the second access point. The portable terminal 20 directly connectable to the portable terminal 20 which can not be connected is detected. In the present embodiment, the third detection unit 42 is a portable terminal 20 that can be indirectly connected to the third portable terminal 20C, which is the first access point, via the fourth portable terminal 20D, which is the second access point. The sixth portable terminal 20F is detected to be directly connectable to the seventh portable terminal 20G and the eighth portable terminal 20H which can not be directly connected to the third portable terminal 20C and the fourth portable terminal 20D. At this time, the third mobile terminal 20C transmits an inquiry signal as to whether the seventh mobile terminal 20G and the eighth mobile terminal 20H can be connected to the sixth mobile terminal 20F via the fourth mobile terminal 20D. . Then, the sixth mobile terminal 20F returns a signal indicating that the connection is possible to the third mobile terminal 20C via the fourth mobile terminal 20D.

  The third setting unit 44 sets the sixth mobile terminal 20F detected by the third detection unit 42 as a third access point. Since the third access point is the portable terminal 20, it is movable (position changeable). The third setting unit 44 transmits an instruction signal to the sixth portable terminal 20F so as to connect to the fourth portable terminal 20D, the seventh portable terminal 20G, and the eighth portable terminal 20H. Thereby, for example, the first mobile terminal 20A mutually wirelessly communicates with the seventh mobile terminal 20G and the eighth mobile terminal 20H via the third mobile terminal 20C, the fourth mobile terminal 20D and the sixth mobile terminal 20F. be able to. When a signal indicating that connection is possible is transmitted from two or more mobile terminals 20, for example, the smaller one of the terminal numbers may be set as the third access point.

  In step S45, the determination unit 130 determines whether all the mobile terminals 20 in the group can communicate with each other wirelessly via the first access point, the second access point, and the third access point. In the present embodiment, the determination unit 130 determines whether the first portable terminal 20A to the eighth portable terminal 20H can wirelessly communicate with each other via the third portable terminal 20C, the fourth portable terminal 20D, and the sixth portable terminal 20F. It is determined whether or not. If all the mobile terminals 20 can wirelessly communicate with each other, the process proceeds to step S50. On the other hand, when some mobile terminals 20 can not communicate by radio, the process proceeds to step S60.

  In the wireless communication system 110 of the present embodiment, the third setting unit 42 sets the sixth portable terminal 20F that can be directly connected to the second access point as the third access point. Here, the third access point can be directly connected to the seventh portable terminal 20G and the eighth portable terminal 20H which can not be directly connected to the first access point and the second access point. Therefore, the first mobile terminal 20A, the second mobile terminal 20B, and the fifth mobile terminal 20E that can be directly connected to the first access point or the second access point can be directly connected to the third access point. The seventh mobile terminal 20G and the eighth mobile terminal 20H can communicate with each other via the first access point and / or the second access point and the third access point.

  In the wireless communication system 110 according to the present embodiment, when the determining unit 130 determines that the portable terminal 20 incapable of wireless communication is not present in the group, the notifying unit 32 can wirelessly communicate all the portable terminals 20. Notify that. As a result, it is possible to recognize that the user using each portable terminal 20 can communicate among all the portable terminals 20 in the group. In addition, when the determination unit 130 determines that the portable terminal 20 incapable of wireless communication exists in the group, the notification unit 32 notifies the portable terminal 20 incapable of wireless communication. Thereby, the user using each portable terminal 20 can recognize which portable terminal 20 in the group can not communicate.

  The preferred embodiment of the present invention has been described above. However, the above-described embodiments are merely illustrative, and the present invention can be embodied in other various forms.

  Although the third access point is set in the above-described embodiments, the present invention is not limited to this. Depending on the positional relationship of the N portable terminals 20, (N-1) access points may be set.

  The first setting unit 24 sets the first access point when any one of the portable terminals 20 whose number of connectable terminals exceeds a predetermined upper limit value is set as the first access point among the plurality of portable terminals 20. A part of the mobile terminals 20 connectable to the first access point may be connected to mobile terminals 20 other than the first access point so that the number of mobile terminals connected is equal to or less than the upper limit value. In the example illustrated in FIG. 5, when the upper limit value of the number of connectable terminals is 3, the first setting unit 24 may, for example, set the third mobile terminal 20C whose number of connectable terminals exceeds the upper limit to the first access point. Set to At this time, since the first mobile terminal 20A and the second mobile terminal 20B can be connected to each other, for example, the second mobile terminal 20B is directly connected to the first mobile terminal 20A and the second mobile terminal 20B And the third mobile terminal 20C can not be connected. In this case, the first mobile terminal 20A is set to another access point. As described above, the processing load on the first access point can be reduced by setting a predetermined upper limit value to the number of connectable terminals to the portable terminal 20 set in the first access point, and the communication network as a whole can communicate It is possible to suppress the decrease in efficiency.

DESCRIPTION OF REFERENCE NUMERALS 10 wireless communication system 20 portable terminal 22 first detection unit 24 first setting unit 26 second detection unit 28 second setting unit 30 determination unit 32 notification unit 34 conversion unit 36 connection detection unit 38 connection unit 40 group reconstruction unit

Claims (12)

A wireless communication system comprising a plurality of portable terminals belonging to a predetermined group and capable of wireless communication with each other,
The portable terminal is
When one of the plurality of mobile terminals in the group is a main mobile terminal and the mobile terminal excluding the main mobile terminal is a sub mobile terminal, the main mobile terminal and the sub mobile terminal are directly connected. A first detection unit that detects, for each of the mobile terminals, the number of connectable terminals that can be connected to the
A first setting unit configured to set, as a first access point, any one of the portable terminals having a predetermined number or more of the connectable terminals among the plurality of portable terminals;
A second detection unit that detects the portable terminal directly connectable to the portable terminal not directly connectable to the first access point from the portable terminals directly connectable to the first access point When,
A second setting unit configured to set the connectable portable terminal detected by the second detection unit as a second access point. The portable terminal is
A determination unit that determines whether all the mobile terminals in the group can wirelessly communicate with each other via the first access point and the second access point;
When it is determined by the determination unit that the portable terminal incapable of wireless communication is not present in the group, a notification that all the portable terminals are capable of wireless communication is notified, and the determination unit The wireless communication system according to claim 1, further comprising: a notification unit configured to notify the portable terminal incapable of wireless communication when it is determined that the portable terminal incapable of wireless communication exists therein. The portable terminal is
Among the mobile terminals that can be indirectly connected to the first access point via the second access point, the mobile terminals that can not be directly connected to the first access point and the second access point are directly connected A third detection unit for detecting the portable terminal connectable to the
The wireless communication system according to claim 2, further comprising: a third setting unit configured to set the connectable portable terminal detected by the third detection unit as a third access point. The determination unit determines whether all the mobile terminals in the group can communicate with each other wirelessly via the first access point, the second access point, and the third access point.
The said notification part notifies that all the said portable terminals can be wirelessly communicated, when the said determination part determines with the said portable terminal incapable of wireless communication existing in the said group not existing, And the said determination The wireless communication system according to claim 3, wherein, when it is determined by the unit that the mobile terminal incapable of wireless communication exists in the group, the mobile terminal is notified of the wireless terminal incapable of wireless communication. When the determination unit determines that the portable terminal incapable of wireless communication exists in the group, the portable terminal can directly communicate with the first access point the portable terminal incapable of wireless communication at predetermined time intervals. A connection detection unit that detects whether the connection can be made manually or indirectly;
5. The connection device according to claim 2, further comprising: a connection unit that directly or indirectly connects the connectable portable terminal detected by the connection detection unit to the first access point. The wireless communication system according to.   The portable terminal is further configured to convert the first voice in the first language and the second voice in the second language to each other when voice transmission / reception is performed between the plurality of mobile terminals in the group. The wireless communication system according to any one of claims 1 to 5, comprising.   The first setting unit sets the mobile terminal with the largest number of connectable terminals among the plurality of mobile terminals as the first access point, according to any one of claims 1 to 6. Wireless communication system.   The first setting unit is configured to set the first access point when any one of the portable terminals whose number of connectable terminals exceeds a predetermined upper limit value is set as a first access point among the plurality of portable terminals. A part of the portable terminals connectable to the first access point is connected to the portable terminals other than the first access point such that the number of the portable terminals connected to the point is equal to or less than the upper limit value The wireless communication system according to any one of claims 1 to 7.   The portable terminal excludes the portable terminal incapable of wireless communication from the group, when the portable terminal incapable of wireless communication in the group can not connect directly or indirectly to the first access point for a predetermined time or more. The wireless communication system according to any one of claims 1 to 8, further comprising a group reconstruction unit.   If the communication quality between the main portable terminal and the sub portable terminal does not meet a predetermined level, the first detection unit determines that the main portable terminal and the sub portable terminal can not be connected directly. The wireless communication system according to any one of claims 1 to 9, wherein   The wireless communication system according to any one of claims 1 to 10, wherein the portable terminal is a self-propelled cleaning robot.   The wireless communication system according to any one of claims 1 to 10, wherein the portable terminal is a portable printer.

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