WO2006067908A1 - ネットワークの構成管理方法及び通信端末 - Google Patents
ネットワークの構成管理方法及び通信端末 Download PDFInfo
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- WO2006067908A1 WO2006067908A1 PCT/JP2005/019365 JP2005019365W WO2006067908A1 WO 2006067908 A1 WO2006067908 A1 WO 2006067908A1 JP 2005019365 W JP2005019365 W JP 2005019365W WO 2006067908 A1 WO2006067908 A1 WO 2006067908A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Definitions
- the present invention relates to a method for managing the configuration of a network constructed so that a plurality of communication terminals can directly communicate with each other, and a communication terminal that configures this network. It relates to the re-entry method for the terminal to rejoin the network.
- wireless networks have become popular in companies and homes because of the advantages of removing the troublesomeness of wiring in wired networks and flexibly changing the layout of terminals.
- Patent Document 1 in a wireless network using a method in which direct communication is performed between terminals without using an access point, a terminal newly joining the network and all other terminals in the wireless network are described.
- Wireless communication system and wireless communication terminal guaranteeing the communication reachability And how to participate in a wireless communication system.
- communication may be disconnected due to a change in communication status.
- communication when communication is disconnected, communication must be reconnected to perform communication again.
- Patent Document 2 when communication is disconnected due to deterioration of the wireless environment, communication is automatically resumed when the wireless environment recovers, rather than the user performing reconnection processing. Devices that allow continuation have been proposed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-318917
- Patent Document 2 Japanese Patent Laid-Open No. 10-243053
- Patent Document 1 The invention described in Patent Document 1 is intended to ensure communication reachability with all terminals participating in the wireless network when the terminal newly joins the wireless network. It is not guaranteed that a terminal participating in this wireless network can always communicate with all other terminals participating in this wireless network.
- Patent Document 2 sets a communication reconnection time when communication is disconnected due to deterioration of the wireless environment, and automatically resumes communication when the wireless environment is restored. However, regardless of whether or not the wireless environment is likely to recover, data for reconnection is transmitted, and wireless communication bandwidth may be wasted.
- the present invention has been made to solve the above-described problems of the prior art, and when a communication terminal whose network power has been eliminated re-enters the network, the communication bandwidth of this network is reduced.
- the network configuration ensures efficient communication, automatically re-enters the network, and guarantees communication reachability between each terminal participating in this network. It is an object of the present invention to provide a management method and a communication terminal constituting a network. Means for solving the problem
- the network configuration management method of the present invention comprises a plurality of communication terminals having unique terminal identifiers, one of the communication terminals serving as a management terminal, and the communication terminal directly communicating with another communication terminal.
- the communication status confirmation result that confirms whether or not the communication is possible is transmitted from each communication terminal to the management terminal, and the participating terminal information based on the communication status confirmation result is also periodically transmitted to each communication terminal.
- the network configuration is managed by the management terminal so that all communication terminals participating in the network can directly communicate with each other. Based on the result of the status confirmation, permission of each communication terminal to participate in the network or exclusion from the network is decided, and the communication terminal participating in the network is determined.
- the excluded communication terminal When the excluded communication terminal receives the participating terminal information transmitted from the management terminal, and the excluded communication terminal receives the received participating terminal. Based on the information, the step of confirming whether the communication terminal confirmation data transmitted to the network can be received or not can be received, and all of the communication terminals participating in the network can be received. When it is confirmed that the communication status confirmation data from the other communication terminal can be received, the excluded communication terminal issues a re-entry request to the management terminal for permission to participate in the network. And a transmitting step.
- the communication terminal of the present invention includes one or more communication terminals having unique terminal identifiers, one of the communication terminals serving as a management terminal, and the communication terminal directly communicating with another communication terminal.
- the communication status confirmation result confirming whether or not the power is possible is transmitted to each communication terminal power to the management terminal, and participation terminal information based on the communication status confirmation result is periodically transmitted from the management terminal to each communication terminal.
- participation terminal information based on the communication status confirmation result is periodically transmitted from the management terminal to each communication terminal.
- the communication terminal constituting the network in which permission or exclusion from the network of each communication terminal is permitted, the communication terminal participating in the network Network And when the excluded communication terminal receives the participation terminal information transmitted from the management terminal, the excluded communication terminal receives the received participation terminal information.
- the number of times that the re-entry operation is performed is stored, and when the re-entry operation is performed a predetermined number of times, the re-entry operation is terminated, so that the user can communicate when it is unlikely Measures such as moving the terminal installation location can be taken.
- FIG. 1 is a configuration diagram showing a wireless network to which a configuration management method according to Embodiment 1 of the present invention is applied.
- FIG. 2 is a block diagram schematically showing a configuration of a management terminal in the first embodiment.
- FIG. 3 is an explanatory diagram showing participating terminal information held by the management terminal in the first embodiment
- FIG. 4 is a block diagram schematically showing a configuration of a communication terminal other than the management terminal in the first embodiment.
- FIG. 5 is an explanatory diagram showing a communication availability determination result held by a communication terminal other than the management terminal in the first embodiment.
- FIG. 6 is a configuration diagram showing a case where communication failure occurs in the wireless network of FIG. 1.
- FIG. 7 is an explanatory diagram showing a communication feasibility determination result held by a communication terminal other than the management terminal in the case of FIG.
- FIG. 8 is an explanatory diagram showing a communication feasibility determination result held by a communication terminal other than the management terminal in the case of FIG.
- FIG. 9 is an explanatory diagram showing a communication feasibility determination result held by a communication terminal other than the management terminal in the case of FIG.
- FIG. 10 is an explanatory diagram showing participation terminal information held by the management terminal in the case of FIG. [11]
- FIG. 11 is a configuration diagram showing a state in which one of the communication terminals is excluded from the wireless network of FIG.
- ⁇ 12] is an explanatory diagram showing participation terminal information held by the management terminal in the case of FIG. 11
- ⁇ 13] is an explanatory diagram showing a communication feasibility determination result held by a communication terminal other than the management terminal in the case of FIG. .
- FIG. 14 is an explanatory diagram showing a communication feasibility determination result held by a communication terminal other than the management terminal in the case of FIG.
- FIG. 15 (a) is a flowchart showing the participation terminal information transmission operation of the management terminal in the first embodiment, and (b) shows the communication availability determination result reception operation of the management terminal in the first embodiment. It is a flowchart to show.
- FIG. 16 is a flowchart showing the operation of a communication terminal other than the management terminal in the first embodiment.
- FIG. 17 A configuration diagram showing a wireless network in which one communication terminal is excluded from the network in Embodiments 1 to 4.
- FIG. FIG. 18 is a flowchart showing the re-entry operation of the communication terminal excluded in the first embodiment.
- FIG. 19 is a flowchart showing the re-entry operation of the communication terminal excluded in the second embodiment.
- FIG. 20 is a flowchart showing the re-entry operation of the communication terminal excluded in the third embodiment.
- FIG. 21 is a flowchart showing the re-entry operation of the communication terminal excluded in the fourth embodiment.
- 10a wireless network 100 communication terminal (management terminal), 200, 300 communication terminal (communication terminal other than the management terminal), 400 communication terminal (communication terminal to re-enter), 101, 201 communication unit, 102, 202 control unit, 103, 203 storage unit, 104, 204 display unit BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a configuration diagram showing a radio network 10 to which the configuration management method according to Embodiment 1 of the present invention is applied.
- the wireless network 10 in the first embodiment is also configured with communication terminals 100, 200, 300, and 400 power.
- the communication terminals 100, 200, 300, 400 include, for example, a plurality of mobile phone devices, a plurality of personal computers (PCs), a combination of a PC and its peripheral devices, or a plurality of video devices (broadcast receivers, A plurality of communication devices having a wireless communication function, such as a video recording device and a video display device.
- Communication terminals 100, 200, 300, and 400 are configured to be able to directly communicate with each other without using an access point.
- the double-directional arrow drawn with a solid line indicates that communication reachability is guaranteed between communication terminals.
- the wireless network 10 is also configured with four communication terminals, the number of communication terminals constituting the wireless network 10 is not limited to four.
- a management terminal device having a function for managing the configuration of the wireless network 10 is also included.
- there is one device hereinafter also referred to as “management terminal”.
- management terminal there is one device (hereinafter also referred to as “management terminal”).
- communication terminal 100 is a management terminal will be described.
- the communication terminals 100, 200, 300, and 400 are communication terminals participating in the wireless network 10 (that is, communication terminals that allow the management terminal to participate in the wireless network), Also called a participating terminal.
- FIG. 2 is a block diagram schematically showing the configuration of the management terminal 100.
- the management terminal 100 includes a communication unit 101 that performs wireless communication with other communication terminals, a control unit 102 that can execute an operation based on software for wireless network management, And a storage unit 103 such as a semiconductor memory.
- the management terminal 100 operates an operation unit (not shown) as a user interface, a display unit 104 such as a liquid crystal screen, an audio output unit (not shown) such as a speaker, and an audio input such as a microphone.
- Various components such as a power supply unit (not shown) and a power supply unit (not shown).
- the control unit 102 is configured by a circuit (hardware).
- FIG. 3 is an explanatory diagram showing participating terminal information stored in the storage unit 103 of the management terminal 100.
- the participating terminal information is information regarding participating car terminals participating in the wireless network 10.
- Participating terminal information includes information that identifies the participating terminals participating in the wireless network 10 by a unique terminal identifier and the ability to communicate between participating terminals (indicated as “Yes” in FIG. 3). Or communication enable / disable determination result information indicating whether communication is not possible between the participating terminals (that is, the communication enable / disable determination result of the entire wireless network 10).
- the terminal identifiers of communication terminals 100, 200, 300, and 400 are assumed to be “100,”, “200,”, “300, and“ 400 ”, respectively.
- FIG. 4 is a block diagram schematically showing the configuration of communication terminals 200, 300, 400.
- each of the communication terminals 200, 300, and 400 can execute an operation based on the communication unit 201 that performs wireless communication with other communication terminals and the wireless network participation software.
- It has a control unit 202 and a storage unit 203 such as a semiconductor memory.
- the communication terminals 200, 300, and 400 each have an operation unit (not shown) as a user interface, a display unit 204 such as a liquid crystal screen, an audio output unit (not shown) such as a speaker, as necessary.
- Various components such as a voice input unit (not shown) such as a microphone and a power supply unit (not shown) are provided.
- the control unit 202 can also be configured by a circuit (nodeware).
- FIG. 5 is an explanatory diagram showing participating terminal information stored in the storage unit 203 of the communication terminal 200.
- participating terminal information includes information that identifies a participating car terminal participating in the wireless network 10 by a unique terminal identifier (information received from the management terminal 100), self, and other participating terminals. It indicates whether it is in a communicable state where it can communicate (indicated in the figure by “Yes”) or in an incommunicable state in which it cannot communicate with other participating terminals (indicated in the figure by “impossible”). Communication enable / disable determination result information.
- the participating terminal information stored in the storage unit of the communication terminal 300 or 400 has the same content as that shown in the explanatory diagram of FIG.
- the configuration of the wireless network is managed as follows.
- Step A first, the management terminal 100 transmits the participating terminal information held by itself.
- the participating terminal information transmitted here is the participating terminal information updated based on the communication status confirmation result that the management terminal 100 receives from the communication terminals 200, 300, and 400 in Step D described later.
- the participation terminal information may be initially set by a user operation or the like.
- step B communication terminals 200, 300, 400 receive participating terminal information transmitted from management terminal 100.
- Step C communication terminals 200, 300, and 400 are used for communication confirmation transmitted from communication terminals other than themselves participating in wireless network 10 based on the received participation terminal information.
- receiving data that is, for communication status confirmation
- step D the communication terminals 200, 300, 400 determine whether communication is possible.
- the communication availability determination result that is, the communication status confirmation result obtained by the setting is transmitted to the management terminal 100.
- the management terminal 100 determines participating terminals to be excluded from the wireless network 10 based on the received communication availability determination result. For example, when it is determined that the communication should be excluded when the communication is continuously impossible a predetermined number of times, it should be excluded when there are more than a predetermined number of communication disabled within a predetermined period. When it is determined that there is a case, it may be determined that a participating terminal having a lower priority order among participating terminals having a communication impossible relationship by setting a priority order for each participating terminal should be excluded.
- the participating terminal information held by the management terminal 100 is updated by deleting the participating terminal information ability of the participating terminal to be excluded from the wireless network 10. Then, when there is a participating terminal that should be excluded from the wireless network 10, the management terminal 100 transmits an exclusion notification that informs the participating terminal that should be excluded from the wireless network 10 that it is excluded from the wireless network 10. .
- step F in the wireless network 10, the above steps A to E are repeated, for example, periodically.
- the wireless network 10 has changed the power communication status configured from four communication terminals 100, 200, 300, and 400, and an X in FIG.
- Step C the communication terminals 200, 300, and 400 determine whether or not communication with a communication terminal other than itself participating in the wireless network 10 is possible.
- step D the communication availability determination result obtained by this determination is transmitted to the management terminal 100. Communication availability determination result information held by the communication terminals 200, 300, and 400 at the time of transmission is shown in FIGS.
- step E the management terminal 100 determines a participating terminal to be excluded from the wireless network 10 based on the received communication availability determination result, and deletes the participating terminal information power of the participating terminal to be excluded from the wireless network 10.
- Management terminal 100 holds Update the participating terminal information. As shown in FIG. 10, the management terminal 100 holds the communication terminal 200 between the communication terminal 200 and the communication terminal 300 immediately after receiving the communication feasibility determination result. The communication terminal 300 and the communication terminal 400 are incapable of communication (indicated by “impossible” in the figure).
- the management terminal 100 excludes the communication terminal 300 from the wireless network 10 in Step E.
- the configuration of the wireless network 10 is switched from the configuration shown in FIG. 6 to the configuration shown in FIG.
- the participation terminal information held by the management terminal 100 is configured to have information power regarding the communication terminals 100, 200, and 400 as shown in FIG.
- the communication terminal information held by the participating terminals 200 and 400 is updated by step A executed again in the above step F, and the communication terminal information held by the participating terminals 200 and 400 is shown in FIGS. 13 and 14, respectively. As shown.
- FIGS. 15A and 15B are flowcharts showing the operation of the management terminal 100.
- FIG. 16 is a flowchart showing the operation of the communication terminals 200, 300, and 400.
- the management terminal 100 has participation terminal information that also configures the terminal information power of the communication terminals participating in the wireless network 10. Based on this participating terminal information, the management terminal 100 and the communication terminals 200, 300, 400 can grasp the communication terminals that are participating in the wireless network 10.
- the management terminal 100 transmits participating terminal information at a predetermined cycle.
- the management terminal 100 first sets a participation terminal information transmission timer (step S1), and determines whether the participation terminal information transmission timer has expired (step S2). If the participation terminal information transmission timer has expired in step S2, the process returns to the beginning of step S2 again, and the management terminal 100 enters a state of waiting for participation terminal information transmission. If the participation terminal information transmission timer has expired in step S2, the management terminal 100 broadcasts the participation terminal information held by itself to the communication terminals constituting the wireless network 10. Transmit to 200, 300, 400 (step S3), and reset the participating terminal information transmission timer (step S4). Thereafter, management terminal 100 periodically repeats transmission of participating terminal information (steps S2 to S4).
- the management terminal 100 receives the communication availability determination result from the communication terminals 200, 300, and 400 (step S11).
- the communication feasibility determination result confirms whether each communication terminal 200, 300, 400 can communicate directly with all other communication terminals participating in the wireless network 10 and confirms whether it can communicate with its own communication terminal. Communication terminals that can communicate with each other and communication terminals that cannot communicate.
- the management terminal 100 determines which communication terminal can continue to participate in the wireless network 10 using the received communication availability determination result (step S12), and whether there is a communication terminal to be excluded from the wireless network 10. Is determined (step S13).
- the management terminal 100 When there is no communication terminal to be excluded from the wireless network 10, the management terminal 100 is in a state of receiving the communication availability determination result again. When there is a communication terminal to be excluded from the wireless network 10, the management terminal 100 updates the participation terminal information by deleting the terminal information of the communication terminal to be excluded from the participation terminal information held by itself (step S14). An exclusion notification is sent to the communication terminal excluded from the wireless network 10 (step S15). Then, the management terminal 100 is in a state of receiving the communication availability determination result again (step S11).
- the management terminal 100 updates the participation terminal information
- the updated participation terminal information is periodically transmitted from the management terminal 100 to each communication terminal 200, 300, 400. Therefore, each communication terminal 200, 300, 400 receives the updated participation terminal information and confirms the updated participation terminal information, so that the wireless network 10 is reconstructed. You can know.
- the management terminal 100 deletes the terminal information of the communication terminal and deletes the participation terminal information power. By updating the information, it can be excluded from the wireless network 10.
- the management terminal 100 indicates which communication terminal is excluded, for example, a liquid crystal display unit.
- the user is notified using means such as displaying the terminal identifier of the excluded communication terminal on (LCD). Then, the user can know which communication terminal has been removed and the configuration of the wireless network has changed, and can take appropriate measures such as installing the removed communication terminal in a place where communication is possible. it can.
- LCD terminal identifier of the excluded communication terminal on
- the communication terminals 200, 300, and 400 set the participation terminal information reception timer to determine whether or not the participation terminal information periodically transmitted by the management terminal 100 power broadcast is receivable (step). After that, it is confirmed whether the participation terminal information reception timer has expired (step S22). If the timer has expired in step S22, the communication terminals 200, 300, and 400 determine that communication with the management terminal 100 has become impossible, and determine that the wireless network 10 has become unable to participate.
- step S22 the communication terminals 200, 300, 400 confirm whether or not the participation terminal information transmitted from the management terminal 100 has been received (step S23), and the participation terminal information is If not received, the participation terminal information reception timer expires again.
- the communication terminals 200, 300, and 400 reset the participation terminal information reception timer (step S24), and use the terminal information of the participation terminal information and use the terminal information of the participation terminal information. It is confirmed whether or not communication with a communication terminal participating in the wireless network is possible, and it is determined whether or not communication with each communication terminal is possible (step S25). As a method of determining whether or not communication with each communication terminal is possible, for example, communication between each communication terminal is performed!
- the communication terminals 200, 300, and 400 determine whether communication with each communication terminal participating in the wireless network 10 is possible, and then can communicate with any communication terminal based on the determination result. Whether communication is possible
- the determination result is transmitted to the management terminal 100 (step S26).
- the communication terminals 200, 300, and 400 confirm whether or not the exclusion notification is received from the management terminal 100, and the communication terminal It is determined whether it is possible to continue to join the wireless network (step S27). If the communication terminal 200, 300, 400 determines that its own communication terminal is excluded from the wireless network 10, it indicates that its own communication terminal has been excluded from the wireless network 10, for example, a red LED The user is notified using means such as blinking. Then, the user can know that the communication terminal has been excluded, and the user can take appropriate measures such as moving the installation location with respect to the excluded communication terminal. If the communication terminal 200, 300, 400 does not receive the rejection notification from the management terminal 100 and determines that its communication terminal can continue to participate in the wireless network 10, the participation terminal information reception timer again. Waiting for expiration (step S22).
- the communication terminals constituting the wireless network can be managed according to the first embodiment, and even when the communication status between the communication terminals changes and communication becomes impossible, By eliminating, it is possible to construct a wireless network that can directly communicate with all the communication terminals participating in this wireless network.
- each communication terminal can immediately know a participating terminal excluded from the network by transmitting an exclusion notification informing the participating terminal to be excluded from the network that it is excluded from the network.
- the participating terminal information can always be updated.
- the user when a participating terminal that has been excluded from the network performs a display to inform the user that its own communication terminal has been excluded from the network power, the user must take measures against the network power being excluded. (For example, moving the device) can be taken immediately.
- FIG. 17 shows that the communication terminal 400 in the network 10 of FIG. 1 is excluded from the network 10 due to, for example, temporary power interruption or deterioration of the communication status, and is composed of three communication terminals 100, 200, 300. It is a figure which shows that the network 10a was comprised.
- FIG. 18 shows the network configuration management method according to the first embodiment, particularly the network capability. 6 is a flowchart showing a re-entry operation to the network by the communication terminal 400 excluded from the above. Note that the processing shown in FIG. 18 is performed when the communication terminal is removed from the network due to temporary power interruption or deterioration of communication status. It can also be applied when the communication terminal is excluded from the network for reasons other than deterioration, and can also be applied whenever the communication terminal is excluded from the network.
- the communication terminal 400 determines whether or not the participation terminal information transmitted from the management terminal 100 at a certain period can be received.
- the participation terminal information reception timer is set (step S30 Do.
- the participation terminal information reception timer is set to a predetermined time (the management terminal transmits the participation terminal information).
- the excluded communication terminal 400 refers to the communication terminals participating in the network 10a by, for example, periodically referring to the participating terminal information transmitted from the management terminal 100. The terminal can be grasped.
- the excluded communication terminal 400 checks whether the participation terminal information reception timer has expired (step S302).
- the excluded communication terminal 400 determines that communication with the management terminal 100 of the network 10a is impossible when the participation terminal information reception timer expires, and again sets the participation terminal information reception timer (step S301). Return to. If the participation terminal information reception timer has not expired, the excluded communication terminal 400 checks whether it has received the participation terminal information to which the management terminal 100 is also transmitted (step S303). If no information has been received, the process returns again to the expiration confirmation state of the participating terminal information reception timer (step S302).
- the communication terminal 400 participates in the network 10a.
- a communication status confirmation timer is set in order to determine whether or not it is possible to receive data from the communication terminal (step S304).
- the communication status confirmation timer transmits a communication confirmation data including its own terminal identifier to a communication terminal other than the communication terminal participating in the network 10 for a predetermined time. Period T2 or more Time).
- the excluded communication terminal 400 confirms whether the communication status confirmation timer has expired (step S305).
- the communication status confirmation timer expires, the excluded communication terminal 400 has one communication terminal that cannot communicate with the communication terminal 400 among the communication terminals 100, 200, and 300 participating in the network 10a. It is determined that there are more devices, and the process returns to the participation terminal information reception timer setting process (step S301), and the re-entry operation is performed again.
- the communication status confirmation timer has expired! /, NA! /, Can data be received from the communication terminals 100, 200, 300 participating in the network 10a? Confirm the communication status and confirm the communication status (step S306).
- the communication terminals 100, 200, and 300 participating in the network 10a check their mutual communication status and form their own terminal identifiers at regular intervals to form a network that allows direct communication between all communication terminals. Sending data for communication confirmation including.
- the excluded communication terminal 400 can confirm the communication status (that is, determine whether communication is possible) by receiving the communication confirmation data.
- Step S303 whether the excluded communication terminal 400 can communicate with all the communication terminals 100, 200, 300 participating in the network 10a based on the participation terminal information received in step S303. If it is possible to communicate with all the communication terminals 10 0, 200, 300 participating in the network 10a, a request to re-enter the network is sent to the management terminal 100. (Step S308). Then, the management terminal 100 that has received the re-entry request updates the participation terminal information and distributes the participation terminal information to each communication terminal to reconfigure the network (configuration shown in FIG. 1).
- step S307 the excluded communication terminal 400 determines that one or more of the communication terminals 100, 200, and 300 participating in the network 10a cannot communicate with the communication terminal 400. In this case, the communication status confirmation timer again waits for expiration (step S305).
- the removed communication terminal 400 For example, means such as blinking the red LED lamp (example For example, it can be configured to notify the user using the display unit 204) of FIG. In this case, the user of the communication terminal 400 can know that the communication terminal has failed to re-enter the network 10a, and accordingly, take appropriate measures such as moving the communication terminal installation location. Can take.
- the communication terminal is excluded from the network due to a temporary power interruption of the communication terminal, a bad communication condition, or the like.
- the removed communication terminals can automatically re-enter the network, and a network that can communicate with all the communication terminals participating in the network can be reconfigured.
- the excluded communication terminal checks the communication status with each communication terminal in the network, and transmits a re-entry request when communication with all communication terminals is possible. It can be reduced as much as possible, and re-entry can be performed using the communication band effectively.
- FIG. 19 is a flow chart showing a network configuration management method according to the second embodiment of the present invention, in particular, a re-entry operation to the network by the communication terminal 400 from which the network is removed.
- steps identical or corresponding to those shown in FIG. 18 are given the same reference numerals.
- steps S301 to S305 of the re-entry operation when the communication terminal 400 is also removed from the network due to power failure or deterioration of the communication status are the case of the first embodiment. Works as well.
- each communication terminal 100, 200, 300 participating in the network 10a is directly connected to all communication terminals.
- communication confirmation data including its own terminal identifier is previously acquired at a certain cycle. Transmit at a specified transmission rate or higher.
- the excluded communication terminal 400 confirms the communication status depending on whether or not data transmitted at a predetermined transmission rate or higher can be received from each communication terminal 100, 200, 300 participating in the network 10a (Ste S311), based on the participating terminal information received in Step S303 Then, it is determined whether or not the communication capability with all communication terminals participating in the network 10a is higher than a predetermined transmission rate (step S312). In step S312, if it is determined that the excluded communication terminal 400 can communicate with all the communication terminals participating in the network 10a at a predetermined transmission rate or higher, the management terminal 100 In response to this, a request to re-enter the network is transmitted (step S308). Then, the management terminal 100 that has received the re-entry request updates the participation terminal information and distributes the participation terminal information to each communication terminal to reconfigure the network (configuration shown in FIG. 1).
- step S312 the excluded communication terminal 400 determines that one or more of the communication terminals 100, 200, and 300 participating in the network 10a cannot communicate with the communication terminal 400. In this case, the communication status confirmation timer again waits for expiration (step S305).
- the communication terminal is excluded from the network due to a temporary power interruption of the communication terminal, a bad communication condition, or the like. Even in such a case, the excluded communication terminals can automatically re-enter the network, and a network that can communicate with all communication terminals participating in the network at a predetermined transmission rate or higher can be reconfigured.
- the excluded communication terminal confirms the communication status with each communication terminal in the network, and transmits a re-entry request when communication with all communication terminals is possible at a predetermined transmission rate or higher. Therefore, the transmission data from itself can be reduced as much as possible, and re-entry can be performed by effectively using the communication band.
- FIG. 20 is a flow chart showing a network configuration management method according to the third embodiment of the present invention, in particular, a re-entry operation to the network by the communication terminal 400 from which the network is removed.
- the same or corresponding steps as those shown in FIG. 18 are denoted by the same reference numerals.
- the communication terminal 400 is connected to the network due to power interruption or deterioration of communication conditions. If the communication terminal 400 is excluded from the network, the communication terminal 400 first sets a re-entry counter for storing the number of times of re-entry after being excluded from the network to zero. Steps S301, S303, S304, and S306 to S308 in FIG. 20 are the same as those in the first embodiment.
- step S324 If the participation terminal information reception timer expires in step S324, or if the communication status confirmation timer expires in step S325, the communication terminal 400 failed to re-enter the network. And the value of the re-entry counter is incremented by 1 (step S322). Then, the communication terminal 400 confirms the value of the re-entry counter, and when the re-entry counter value is less than a predetermined threshold value, the re-entry operation is performed again from step S301. Communication terminal 400 terminates the re-entry operation when the value of the re-entry counter is equal to or greater than a predetermined threshold.
- the communication terminal 400 determines that the re-entry into the network has failed, and uses a means such as blinking the red LED lamp to prompt the user. Notice. In this case, since the user can know that the communication terminal has failed to re-enter the network, the user can take appropriate measures such as moving the installation location of the communication terminal.
- the communication terminal is excluded from the network due to a temporary power interruption of the communication terminal, a bad communication condition, or the like.
- the removed communication terminals can automatically re-enter the network, and a network that can communicate with all the communication terminals participating in the network can be reconfigured.
- the excluded communication terminal checks the communication status with each communication terminal in the network, and transmits a re-entry request when communication with all communication terminals is possible. It can be reduced as much as possible, and re-entry can be performed using the communication band effectively.
- the number of re-entry operations performed by the re-entry counter is memorized, and when the number of times more than a certain number of times is performed, the re-entry operation is terminated, and the user is notified that the re-entry has failed.
- the user can take measures such as moving the installation location, and the operation to check the communication status with other communication terminals can be suppressed, reducing power consumption. It becomes possible to suppress.
- FIG. 21 is a flowchart showing a network configuration management method according to the fourth embodiment of the present invention, in particular, a re-entry operation to the network by the communication terminal 400 from which the network is removed.
- steps that are the same as or correspond to the steps shown in FIG. the network configuration management method according to the fourth embodiment employs steps S311 and S312 instead of steps S306 and S307 in FIG. 20 (third embodiment). This is different from the network configuration management method according to the third embodiment.
- each communication terminal 100, 200, 300 participating in the network 10a is directly connected between all communication terminals.
- communication confirmation data including its own terminal identifier is previously acquired at a certain cycle. Transmit at a specified transmission rate or higher.
- the excluded communication terminal 400 confirms the communication status depending on whether or not data transmitted at a predetermined transmission rate or higher can be received from each communication terminal 100, 200, 300 participating in the network 10a ( Based on the participation terminal information received in step S311) and step S303, it is determined whether or not the communication capability with all communication terminals participating in the network 10a exceeds a predetermined transmission rate (step S312). In step S312, if it is determined that the excluded communication terminal 400 can communicate with all the communication terminals participating in the network 10a at a predetermined transmission rate or higher, the management terminal 100 In response to this, a request to re-enter the network is transmitted (step S308). Then, the management terminal 100 that has received the re-entry request updates the participation terminal information and distributes the participation terminal information to each communication terminal to reconfigure the network (configuration shown in FIG. 1).
- step S312 the excluded communication terminal 400 determines that one or more of the communication terminals 100, 200, 300 participating in the network 10a cannot communicate with the communication terminal 400. In this case, the communication status confirmation timer again waits for expiration (step S305).
- the communication terminal is excluded from the network due to a temporary power interruption of the communication terminal, a bad communication condition, or the like. Even in such a case, the excluded communication terminals can automatically re-enter the network, and a network that can communicate with all communication terminals participating in the network at a predetermined transmission rate or higher can be reconfigured.
- the excluded communication terminal confirms the communication status with each communication terminal in the network, and transmits a re-entry request when communication with all communication terminals is possible at a predetermined transmission rate or higher. Therefore, the transmission data from itself can be reduced as much as possible, and re-entry can be performed by effectively using the communication band.
- the number of re-entry operations performed by the re-entry counter is stored, and when the number of re-entry operations exceeds a certain number, the re-entry operation is terminated and the user is notified that the re-entry operation has failed. If the possibility of entering is low, the user can take measures such as moving the installation location, and the operation to check the communication status with other communication terminals can be suppressed, reducing power consumption. It becomes possible.
- Embodiment 4 the points other than the above are the same as those in Embodiments 1 to 3.
- Embodiments 1 to 4 the power described in the case of using a wireless network (IEEE802.11, IEEE802.11a, IEEE802.11b, IEEE802.11lg, UWB, etc.) as the network is described.
- a wireless network IEEE802.11, IEEE802.11a, IEEE802.11b, IEEE802.11lg, UWB, etc.
- a high-speed PLC network using power lines
- RF lines are used, which disables communication with communication terminals in the network due to changes in the communication status between each communication terminal, as in wireless networks.
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JP2008147927A (ja) * | 2006-12-08 | 2008-06-26 | Sumitomo Electric Ind Ltd | 電力線通信の機器登録方法及び電力線通信装置 |
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JPH11251992A (ja) * | 1998-02-27 | 1999-09-17 | Sony Corp | 通信制御方法及び伝送装置 |
JP2003318917A (ja) * | 2002-04-26 | 2003-11-07 | Sony Corp | 無線通信システム、無線通信端末および無線通信システムへの参加方法 |
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JPH11251992A (ja) * | 1998-02-27 | 1999-09-17 | Sony Corp | 通信制御方法及び伝送装置 |
JP2003318917A (ja) * | 2002-04-26 | 2003-11-07 | Sony Corp | 無線通信システム、無線通信端末および無線通信システムへの参加方法 |
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JP2008147927A (ja) * | 2006-12-08 | 2008-06-26 | Sumitomo Electric Ind Ltd | 電力線通信の機器登録方法及び電力線通信装置 |
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