WO2005079007A1 - ネットワークの構成管理方法、ネットワークの帯域管理方法、ネットワークへの参加方法、及び通信端末装置 - Google Patents
ネットワークの構成管理方法、ネットワークの帯域管理方法、ネットワークへの参加方法、及び通信端末装置 Download PDFInfo
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- WO2005079007A1 WO2005079007A1 PCT/JP2004/018615 JP2004018615W WO2005079007A1 WO 2005079007 A1 WO2005079007 A1 WO 2005079007A1 JP 2004018615 W JP2004018615 W JP 2004018615W WO 2005079007 A1 WO2005079007 A1 WO 2005079007A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
- H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/085—Retrieval of network configuration; Tracking network configuration history
- H04L41/0853—Retrieval of network configuration; Tracking network configuration history by actively collecting configuration information or by backing up configuration information
- H04L41/0856—Retrieval of network configuration; Tracking network configuration history by actively collecting configuration information or by backing up configuration information by backing up or archiving configuration information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
Definitions
- Network configuration management method network bandwidth management method, network participation method, and communication terminal device
- the present invention relates to a method and a network for managing the configuration of a network constructed so that a plurality of communication terminal devices (hereinafter also referred to as “communication terminals” or “terminals”) can directly communicate with each other.
- the present invention relates to a method for managing a communication band, a method for participating in a network, and a communication terminal device constituting the network.
- wireless networks have become widespread in companies and homes because of the advantages of eliminating the hassle of wiring in wired networks and of being able to flexibly change the layout of terminals.
- wireless network construction methods one that uses an access point to perform all communication between terminals via an access point, and one that uses an access point to communicate directly between terminals without using an access point. .
- Patent Document 1 discloses a method of performing direct communication between terminals without using an access point in a wireless network, in which communication between a terminal newly joining the network and all other terminals reaches communication. A wireless communication system, a wireless communication terminal, and a method of participating in the wireless communication system that guarantee the performance are shown.
- Patent Document 1 discloses a method of transmitting multimedia data in a wireless network while maintaining a constant quality.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-318917
- Patent Document 2 JP 2002-111728 A
- a wireless network In a wireless network, the communication status between terminals changes with time, and the transmission rate used changes due to transmission errors and the like.
- IEEE802.11a specifies usable transmission rates of 6 Mbps, 9 Mbps, 12 Mbps, 18 Mbps, 24 Mbps, 36 Mbps, 48 Mbps and 54 Mbps.When the communication environment is very good, data transmission at 54 Mbps is required. If the communication environment is very poor, perform data transmission at 6 Mbps.
- An object of the invention described in Patent Document 1 is to guarantee the communication reachability of all terminals participating in a wireless network when the terminal newly joins the network.
- the network described in Patent Document 1 has a problem that when the transmission rate to be used is changed due to a change in the communication status, the communication band may not be properly managed.
- the communication band may not be properly managed.
- communication reachability even if communication reachability is guaranteed at a certain transmission rate, communication may not be possible if an attempt is made to communicate at a higher transmission rate. .
- the invention described in Patent Literature 1 aims to guarantee communication reachability between all terminals participating in a network.
- Patent Document 1 cannot grasp the transmission rate at which the communication reachability is guaranteed between the terminals participating in the wireless network, and the communication within the network has a certain level or more. Even when quality is required, there has been a problem that a certain level of communication quality cannot be guaranteed.
- the invention described in Patent Document 2 takes into account an increase in the retransmission frequency at the time of a transmission error, but takes into account a change in the communication band when the used transmission rate is changed. Is not considered. For this reason, the wireless network described in Patent Document 2 cannot properly manage the communication band when the transmission rate to be used is changed due to a change in the communication situation. There was a problem.
- an object of the present invention is to provide a network that directly communicates between terminals so as to maintain the communication reachability between terminals participating in the network. It is an object of the present invention to provide a method and a communication terminal device constituting such a network.
- Still another object of the present invention is to provide a network for performing direct communication between terminals, guaranteeing communication reachability between terminals participating in the network, and enabling communication between the terminals. It is an object of the present invention to provide a method of participating in a network capable of ascertaining a transmission rate, a method of managing the configuration of such a network, and a communication terminal device configuring such a network.
- the network configuration management method provides a method for managing a plurality of communication terminals having unique terminal identifiers.
- one of the plurality of communication terminal devices becomes a management terminal device, and a communication terminal device that permits the management terminal device to participate in the network becomes a participation terminal device.
- the network bandwidth management method of the present invention includes a network including a plurality of communication terminals including one management terminal and a plurality of managed terminals, wherein the plurality of communication terminals directly communicate with each other.
- the method of joining a network is a method of joining a plurality of communication terminals having a unique terminal identifier, wherein one of the communication terminals is a management terminal, and the communication terminals participating in the network are mutually connected.
- a plurality of communication terminals having unique terminal identifiers may be used.
- One of the communication terminals may be a management terminal, and the communication terminal may be participating in a network.
- Receiving the participation request including the communication enable / disable information indicating whether or not communication with the communication terminal is possible and the result of determining the transmission rate at which communication is possible.
- a network if a network is configured, it is possible to continue to guarantee the communication reachability between communication terminals participating in the network, even when the communication situation changes, which has the following effect. can get.
- the present invention it is possible to appropriately manage a communication band even when a transmission rate is changed.
- a network that enables direct communication between communication terminals without using an access point is configured, use an access point and connect via an access point. Compared to a network to perform communication, an effect force s that can be used to twice the bandwidth.
- the step of receiving the participation terminal information of the communication terminal participating in the network, which is transmitted periodically from the management terminal, and the step of participating in the network based on the participation terminal information Determining whether communication with all the communication terminals is possible and the transmission rate at which communication is possible; transmitting a participation request including the result of the transmission rate determination to the management terminal; transmitting the participation request transmission result from the management terminal; Receiving the result of the participation determination of the network to be performed, and determining whether to participate in the network based on the received participation determination result.
- All terminals can communicate directly, the transmission rate at which communication between each terminal is possible is ascertained, and the transmission rate exceeds a predetermined level
- the sea urchin network by configuring, as compared with the method that guarantees the communication reach of the network, the effect of always it is possible to configure a network capable of maintaining communication quality constant following.
- FIG. 1 is a configuration diagram showing a wireless network to which a 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 according to the first embodiment.
- FIG. 3 is an explanatory diagram showing participating terminal information held by a management terminal according to 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 participating terminal information held by a communication terminal other than the management terminal according to the first embodiment.
- FIG. 7 is an explanatory diagram showing participating terminal information held by communication terminals other than the management terminal in the case of FIG.
- Plant 8 is an explanatory diagram showing participating terminal information held by communication terminals other than the management terminal in the case of FIG. 6.
- Plant 9 is an explanatory diagram showing participating terminal information held by communication terminals other than the management terminal in the case of FIG. 6.
- FIG. 10 is an explanatory diagram showing participant terminal information held by the management terminal in the case of FIG. Garden 11] is a configuration diagram showing a state in which one communication terminal is excluded in the wireless network of FIG.
- Garden 12 is an explanatory diagram showing the participation terminal information held by the management terminal in the case of FIG. 11.
- Garden 13 is an explanatory diagram showing the participation terminal information held by the communication terminals other than the management terminal in the case of FIG. It is.
- FIG. 15 (a) is a flowchart showing the operation of transmitting the participation terminal information of the management terminal in the first embodiment, and (b) shows the operation of receiving the communication availability determination result of the management terminal in the first embodiment. It is a flowchart shown.
- 17 is a flowchart showing the operation of the communication terminal other than the management terminal in the first embodiment.
- 17 is a flowchart showing the operation of a communication terminal other than the management terminal according to the second embodiment of the present invention.
- FIG. 18 is a flowchart showing the operation of the management terminal in the second embodiment.
- FIG. 19 are flowcharts showing operations of communication terminals other than the management terminal according to Embodiment 3 of the present invention, and (a) shows an operation of transmitting data for determining whether communication is possible.
- (B) shows the operation of judging whether communication is possible
- (c) shows the operation of receiving data for judging communication.
- FIG. 20 is a block diagram showing a configuration of a communication terminal according to a modification of the first embodiment.
- FIG. 21 is a block diagram showing a configuration of a communication terminal according to a modification of the second embodiment.
- FIG. 22 is a block diagram showing a configuration of a management terminal according to a modification of the first embodiment.
- FIG. 23 is a block diagram showing a configuration of a management terminal according to a modification of the second embodiment.
- FIG. 24 is a diagram showing a configuration example of a wireless network to which the communication band management method according to Embodiment 4 of the present invention is applied.
- FIG. 25] (a) and (b) are flowcharts showing the operation of the wireless communication terminal in the fourth embodiment.
- FIG. 26 is a diagram showing an example of used band information in the fourth embodiment.
- FIG. 27 is a diagram showing an example of the relationship between the wireless transmission rate and the communication band in the fourth embodiment.
- FIG. 28] (a) to (d) are flowcharts showing the operation of the wireless communication terminal in the fourth embodiment.
- FIG. 29 is a diagram showing an example of a maximum transmission rate in the fourth embodiment.
- FIG. 30 shows an example of communication band management information in the fourth embodiment.
- FIG. 31 is a diagram showing a configuration example of a wireless network in a fourth embodiment.
- FIG. 32 is a diagram showing an example of bandwidth usage information in the fourth embodiment.
- FIG. 33 is a diagram showing an example of communication band management information in the fourth embodiment.
- FIG. 35 is a diagram showing a configuration example of a wireless network to which a participation method and a management method according to Embodiments 6 to 8 of the present invention are applied.
- FIG. 36 is a flowchart showing an operation of a wireless communication terminal configuring a wireless network in the sixth embodiment.
- Garden 37] is a flowchart showing operations of a management terminal configuring a wireless network in Embodiments 6-8.
- FIG. 38 is a flowchart showing the operation of the management terminal configuring the wireless network in the sixth embodiment.
- FIG. 39 is a diagram showing an example of a transmission rate at which communication can be performed between wireless communication terminals in the sixth embodiment.
- FIG. 40 is a flowchart showing an example of an operation of determining a transmission rate of a wireless communication terminal of a wireless network in the sixth embodiment.
- FIG. 41 shows an example of participation terminal information in the sixth embodiment.
- FIG. 42 shows an example of participation terminal information in the sixth embodiment.
- FIG. 43 is a flowchart showing an operation of a wireless communication terminal configuring a wireless network in the seventh embodiment.
- FIG. 45 is a diagram showing an example of a transmission rate at which communication can be performed between wireless communication terminals in the seventh embodiment.
- Garden 46 is a flowchart showing an example of an operation of determining whether or not a management terminal of a wireless network can participate in a seventh embodiment.
- FIG. 47 is a diagram showing an example of a transmission rate at which communication can be performed between wireless communication terminals in the seventh embodiment.
- FIG. 48 is a diagram showing an example of a transmission rate at which communication is possible between wireless communication terminals in the seventh embodiment.
- FIG. 49 is a diagram showing an example of priorities for wireless communication terminals in the seventh embodiment.
- FIG. 50 shows an example of participation terminal information in the seventh embodiment.
- FIG. 51 shows a configuration example of a wireless network in a seventh embodiment.
- FIG. 52 is a diagram showing an example of an excluded terminal list in the seventh embodiment.
- FIG. 53 is a diagram illustrating a part of the transmission rate determination information of the wireless communication terminal in the seventh embodiment.
- FIG. 54 is a diagram illustrating a portion of transmission rate determination information of another wireless communication terminal according to Embodiment 7.
- FIG. 55 is a diagram illustrating an example of an excluded terminal list in the seventh embodiment.
- FIG. 56 is a flowchart showing an operation of a wireless communication terminal configuring a wireless network in the eighth embodiment.
- FIG. 57 is a flowchart showing an operation of a management terminal configuring a wireless network in the eighth embodiment.
- FIG. 58 is a block diagram showing a configuration of a variation of the wireless communication terminal according to Embodiment 68.
- FIG. 59 is a block diagram showing a configuration of another modification of the wireless communication terminal according to Embodiment 68.
- FIG. 60 is a block diagram showing a configuration of a modified example of the management terminal according to Embodiment 68.
- FIG. 61 is a block diagram showing a configuration of another modification of the management terminal according to Embodiments 6-8.
- 1010, 1010a Wireless network 1100 wireless communication terminal (management terminal), 1200, 1 300, 1400 wireless communication terminal (wireless communication terminal other than management terminal), 1101, 1201 communication unit, 1102, 1202 control unit, 1103, 1203 Storage, 1104, 1204 display,
- 2802 STB 3101 wireless communication terminal (management terminal), 3102—3104 (wireless communication terminal other than management terminal), 3105 wireless communication terminal (join request terminal), 3110, 3110a wireless network, 4301 communication section, 4302 participant terminal information Receiving part, 4303 transmission rate judgment part, 4304 transmission rate judgment information transmission part, 4305 participation request transmission part, 4 306 Participation request part, 4307 exclusion notification receiving part, 4308a, 4308b exclusion determination part, 4501 communication part, 4502 participation request receiving part, 4503 participant terminal information transmitting part, 4504 participant terminal information updating part, 4505 participant determination part, 4506 Rejection notification transmitter, 45 07 Transmission rate judgment information receiver.
- FIG. 1 is a configuration diagram showing a wireless network 1010 to which the management method according to Embodiment 1 of the present invention is applied.
- the wireless network 1001 includes communication terminals 1100, 1200, 1300, and 1400.
- the communication terminals 1100, 12000, 1300, and 1400 include, for example, a plurality of mobile telephone devices, a plurality of personal computers (PCs), a combination of a PC and its peripheral devices, or a plurality of video devices (broadcast reception and reception). , Video recording devices, video display devices, etc.).
- Communication terminals 1100, 1200, 1300, and 1400 are configured to be able to directly communicate with each other without using an access point.
- FIG. 1 is a configuration diagram showing a wireless network 1010 to which the management method according to Embodiment 1 of the present invention is applied.
- the wireless network 1001 includes communication terminals 1100, 1200, 1300, and 1400.
- FIG. 1 shows a case where the wireless network 1010 is composed of four communication terminals, the number of communication terminals constituting the wireless network 1010 is not limited to four. Further, among the communication terminals 1100, 1200, 1300, and 1400, for example, one management terminal device (hereinafter, “management terminal”) having a function of managing the configuration of the Mizumi Network 1010 exists. .
- management terminal one management terminal device having a function of managing the configuration of the Mizumi Network 1010 exists.
- communication terminal 1100 is a management terminal will be described.
- the communication terminals 1100, 1200, 1300, and 1400 are communication terminals that participate in the wireless network 1010 and report (that is, communication terminals that allow the management terminal to participate in the wireless network).
- FIG. 2 is a block diagram schematically showing a configuration of management terminal 1100.
- the management terminal 1100 causes a communication unit 1101 that performs wireless communication with another communication terminal, and causes each component in the management terminal 1100 to execute an operation based on wireless network management software.
- a storage unit 1103 such as a semiconductor memory.
- the management terminal 1100 is provided with an operation unit (not shown) as a user interface as necessary. ),
- a display unit 1104 such as a liquid crystal screen, an audio output unit (not shown) such as a speaker, an audio input unit (not shown) such as a microphone, and a power supply unit (not shown).
- FIG. 3 is an explanatory diagram showing participating terminal information stored in the storage unit 1103 of the management terminal 1100.
- participating terminal information is information on participating terminals participating in wireless network 1010.
- Participating terminal information includes information for identifying the participating terminals participating in the wireless network 1010 by a unique terminal identifier, and the power in a communicable state where the participating terminals can communicate with each other. . )
- communication enable / disable determination result information indicating whether or not communication is not possible between the participating terminals (that is, communication enable / disable determination result of the entire wireless network 1010).
- the terminal identifiers of the communication terminals 1100, 1200, 1300, and 1400 are “1100”, “1200”, “1300”, and “1400”, respectively.
- FIG. 4 is a block diagram schematically showing a configuration of communication terminals 1200, 1300, and 1400.
- communication terminals 1200, 1300, and 1400 each have a communication unit 1201 that performs wireless communication with another communication terminal, and an operation based on software for participating in a wireless network in each configuration in the communication terminal.
- a controller 1202 such as a semiconductor memory.
- the communication terminals 1200, 1300, and 1400 each include an operation unit (not shown) as a user interface, a display unit 1204 such as a liquid crystal screen, a sound output unit such as a speaker (not shown), It has various components such as a voice input unit (not shown) such as a microphone and a power supply unit (not shown).
- FIG. 5 is an explanatory diagram showing participating terminal information stored in the storage unit 1203 of the communication terminal 1200.
- the participating terminal information includes information for identifying the participating terminal participating in the wireless network 1010 by a unique terminal identifier (information received from the management terminal 1100), and the own terminal and other participating terminals. A force that is in a communicable state in which communication can be performed. ) Or communication availability determination result information indicating whether communication is not possible (indicated by “impossible” in the figure) in which communication between itself and other participating terminals is not possible.
- the participant terminal information stored in the storage unit of the communication terminal 1300 or 1400 has the same content as that shown in the explanatory diagram of FIG. 5 (the content of its own communication availability determination result is different).
- Wireless In the network 1010 the configuration of the wireless network is managed as follows.
- step A first, the management terminal 1100 transmits the participating terminal information held by itself.
- the participant terminal information transmitted here is the participant terminal information updated in step D described later.
- the participation terminal information may be initialized by a user operation or the like.
- step B the communication terminals 1200, 1300, and 1400 receive the participating terminal information transmitted from the management terminal 1100.
- step C the communication terminals 1200, 1300, and 1400 can communicate with the communication terminal other than the self that is participating in the wireless network 1010 based on the received participant terminal information. Judgment is made.
- step D the communication terminals 1200, 1300, and 1400 transmit the communication availability determination result obtained by determining whether communication is possible to the management terminal 1100.
- the management terminal 1100 determines a participating terminal to be excluded from the wireless network 1010 based on the received communication availability determination result. As a method of this determination, for example, when it is determined that communication should be excluded when communication is not possible for a predetermined number of times in succession, it should be excluded when the relationship of communication failure is larger than a predetermined number within a predetermined period.
- a priority is set for each participant terminal, and a participant terminal having a lower priority order among the participant terminals having a communication disabled relationship is determined to be a participant terminal to be excluded.
- the participant terminal information held by the management terminal 1100 is updated by deleting the participant terminal information capability of the participant terminal to be excluded from the wireless network 1010.
- the management terminal 1100 transmits an exclusion notification to the participating terminal to be excluded from the wireless network 1010 to notify that the terminal is to be excluded from the wireless network 1010. .
- step F in the wireless network 1010, the power is repeated, for example, periodically, to the above-described step A power E.
- a wireless network 1010 is composed of four communication terminals 1100, 1200, 1300, and 1400.
- a case will be described in which communication between the communication terminal 1200 and the communication terminal 1300 and between the communication terminal 1300 and the communication terminal 1400 become impossible as indicated by the double-headed arrow (broken line).
- the communication terminals 1200, 1300, and 1400 determine whether communication with the communication terminals other than the self participating in the wireless network 1010 is possible, and the above-described step D In, the communication availability determination result obtained by this determination is transmitted to the management terminal 1100.
- the communication availability determination result information held by the communication terminals 1200, 1300, and 1400 at the time of this transmission, respectively, is between the communication terminal 1200 and the communication terminal 1300, and Communication between the communication terminal 1300 and the communication terminal 1400 is disabled (indicated as “impossible” in the figure).
- the management terminal 1100 determines a participating terminal to be excluded from the wireless network 1010 based on the received communication availability determination result, and deletes the participating terminal to be excluded from the wireless network 1010 from the participating terminal information. Accordingly, the participant terminal information held by the management terminal 1100 is updated. As shown in FIG.
- the management terminal 1100 holds the participant terminal information held by the management terminal 1100 after the update, immediately after receiving the communication availability determination result, between the communication terminal 1200 and the communication terminal 1300, and Communication between the communication terminal 1300 and the communication terminal 1400 is disabled (indicated as “impossible” in the figure).
- the management terminal 1100 excludes the communication terminal 1300 from the wireless network 1010 in the step E.
- the configuration of wireless network 1010 switches from the configuration shown in FIG. 6 to the configuration shown in FIG.
- the participant terminal information held by the management terminal 1100 is composed of information on the communication terminals 1100, 1200, and 1400.
- step A which is executed again in step F, the communication terminal information held by the participating terminals 1200 and 1400 is also updated, and the communication terminal information held by the participating terminals 1200 and 1400 is shown in FIG. 13 and FIG. As shown in 14.
- FIGS. 15A and 15B are flowcharts showing the operation of the management terminal 1100.
- Figure 1 6 is a flowchart showing the operation of the communication terminals 1200, 1300, 1400.
- the management terminal 1100 has participating terminal information composed of terminal information of communication terminals participating in the wireless network 1010. From the participating terminal information, the management terminal 1100 and the communication terminals 1200, 1300, and 1400 can grasp the communication terminals participating in the wireless network 1010.
- the management terminal 1100 transmits participating terminal information at a predetermined cycle.
- the management terminal 1100 first sets a participating terminal information transmission timer (step S1), and determines whether the participating terminal information transmitting timer has expired (step S2). If the participation terminal information transmission timer has not expired in step S2, the process returns to the beginning of step S2 again, and management terminal 1100 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 1100 broadcasts the participation terminal information held by itself to the communication terminals 1200, 1300, and 1400 constituting the wireless network 1010. The participant terminal information transmission timer is reset (step S4 ). Thereafter, the management terminal 1100 periodically repeats the transmission of the participating terminal information (steps S2 to S4).
- the management terminal 1100 receives the communication availability determination result from the communication terminals 1200, 1300, and 1400 (Step Sll).
- the communication availability determination result confirms whether each communication terminal 1200, 1300, and 1400 can directly communicate with all communication terminals other than the self that is participating in the wireless network 1010, and determines whether communication with its own communication terminal is possible. Indicates a communication terminal that can communicate and a communication terminal that cannot communicate.
- the management terminal 1100 determines which communication terminal can continue to participate in the wireless network 1010 using the received communication availability determination result (step S12), and determines whether there is a communication terminal to be excluded from the wireless network 1010.
- Power is determined (step S13).
- determining which communication terminal is excluded from the wireless network 1010 using the communication availability determination result For example, priorities are assigned to communication terminals in advance, and if there is a communication terminal that cannot communicate in the communication availability determination result, communication terminals with lower priorities are excluded in order of priority. By doing so, it is possible to determine which communication terminal is to be excluded.
- the management terminal 1100 When there is no communication terminal to be excluded from the wireless network 1010, the management terminal 1100 is again in a state of receiving the communication availability determination result. If there is a communication terminal to be excluded from the wireless network 1010, the management terminal 1100 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 1010 (step S15). Then, the management terminal 1100 enters a state of receiving the communication availability determination result again (step S11).
- the management terminal 1100 updates the participating terminal information
- the updated participating terminal information is periodically transmitted from the management terminal 1100 to each of the communication terminals 1200, 1300, and 1400. Therefore, each of the communication terminals 1200, 1300, and 1400 can receive the updated participant information and confirm that the wireless network 1010 has been reconstructed by confirming the updated participant information.
- the management terminal 1100 deletes the terminal information of the communication terminal from the participating terminal information and deletes the participating terminal. By updating the information, it is possible to exclude from the wireless network 1010.
- the management terminal 1100 When the communication terminal is excluded from the wireless network, the management terminal 1100 indicates which communication terminal has been excluded, for example, by displaying the terminal identifier of the excluded communication terminal on a liquid crystal display (LCD). Notify the user using columns. The user can know which communication terminal has been removed and the configuration of the wireless network has changed, and take appropriate measures such as installing the removed communication terminal in a place where communication is possible. Can be.
- LCD liquid crystal display
- Step S2 1 the operation of communication terminals 1200, 1300, and 1400 constituting the wireless network according to the first embodiment will be described using FIG. Communication terminal 1200, 1300, 1400f, ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ (Step S2 1), and then check whether the participating terminal information reception timer has expired (Step S2). 2). If the timer power S has expired in step S22, the communication terminals 1200, 1300, and 1400 have determined that communication with the management terminal 1100 has been disabled, and have determined that they have become unable to participate in the wireless network 1010. to decide.
- step S22 communication terminals 1200, 1300, and 1400 confirm whether or not the participating terminal information transmitted from management terminal 1100 has been received (step S23), and If not received, the participant terminal information reception timer is again checked for expiration.
- communication terminals 1200, 1300, and 1400 reset the participating terminal information receiving timer (step S24), and use the terminal information of the participating terminal information to transmit a wireless signal other than the own terminal. It is checked whether it is possible to directly communicate with the communication terminals participating in the network, and it is determined whether or not communication with each communication terminal is possible (step S25).
- each communication terminal can communicate with each other, and if communication is normally performed, communication between the communication terminals is possible. Can be determined. Then, the communication terminals 1200, 1300, and 1400 determine whether communication with each of the communication terminals participating in the wireless network 1010 is possible or not, and based on the determination result, determine which communication terminal is currently available for communication. Then, the communication availability determination result is transmitted to the management terminal 1100 (step S26).
- the communication terminals 1200, 1300, and 1400 After transmitting the communication availability determination result to the management terminal 1100, the communication terminals 1200, 1300, and 1400 check whether or not the exclusion notification has been received from the management terminal 1100, and the communication terminal of the communication terminal 1200, 1300, or 1400 connects to the wireless network. It is determined whether or not participation is possible (step S27).
- the communication terminals 1200, 1300, and 1400 determine that their communication terminals have been excluded from the wireless network 1010
- the communication terminals 1200, 1300, and 1400 for example, blink a red LED of the LED to indicate that their communication terminals have been excluded from the wireless network 1010.
- the user can know that the communication terminal has been eliminated, and the user can take appropriate measures such as moving the installation location to the eliminated communication terminal. . If the communication terminals 1200, 1300, and 1400 do not receive the non-exclusion notification from the management terminal 1100, and determine that their own communication terminal can continue to participate in the wireless network 1010, they will receive the participating terminal information again. The timer enters an expiration waiting state (step S22). As described above, according to the first embodiment, communication terminals constituting a wireless network can be managed, and even if communication becomes impossible due to a change in the communication status between the communication terminals, the number of participating terminals can be reduced.
- each communication terminal can immediately know the participating terminal that has been excluded from the network. Further, by repeating the determination in step C periodically, the participating terminal information can be always updated. In addition, if a participating terminal removed from the network displays a message to inform the user that his or her communication terminal has been removed from the network, the user must take measures against the removal from the network. (For example, moving the device) can be taken immediately.
- the network configuration management method according to the second embodiment of the present invention is based on the point that, in step E in the first embodiment, an exclusion notification from the management terminal 1100 is not transmitted. Different from the method.
- FIG. 17 is a flowchart showing an operation of the communication terminal according to Embodiment 2 of the present invention.
- the operation of the communication terminals 1200, 1300, and 1400 in the second embodiment configuring the wireless network 1010 will be described with reference to FIG.
- the processing contents of steps S21 to S23 are the same as the processing contents of steps S21 to S23 in FIG. 16 (Embodiment 1).
- step S28 Participating terminal information is used to delete and update terminal information of communication terminals to be excluded from the wireless network 1010 based on the communication availability determination results received from the management terminal 1100 from each of the communication terminals 1200, 1300, and 1400. By checking the participating terminal information, the own communication terminal is participating in the wireless network 1010. 1010 can be determined.
- the reception terminals are reset (steps). (S24), the communication availability determination (step S25), the communication availability determination result is transmitted to the management terminal 1100 (step S26), and the participant terminal information reception timer waits for expiration again (step S22).
- FIG. 18 is a flowchart showing an operation of the management terminal according to Embodiment 2 of the present invention.
- the operation of the management terminal 1100 for receiving the communication availability determination result in Embodiment 2 for configuring the wireless network 1010 will be described with reference to FIG.
- the operation of transmitting the participation terminal information of management terminal 1100 in the second embodiment is the same as that in the first embodiment (the operation shown in FIG. 15 (a)).
- the operation for receiving the communication availability determination result of the management terminal 1100 according to the second embodiment excludes the operation part of notifying the communication terminal excluded from the wireless network 1010 (step S15). Only the point is different from the case of the first embodiment (the operation shown in FIG. 15B).
- the operation for receiving the communication availability determination result of the management terminal 1100 in the second embodiment is the same as the operation in step S11-S14 for receiving the communication availability determination result in the first embodiment. As shown in (5), after the participating terminal information is updated in step S14, the state where the communication availability determination result is received again (step S11).
- the communication terminals 1200, 1300, and 1400 confirm the participating terminal information transmitted by the management terminal 1100, so that their own communication terminals can continue to connect to the wireless network 1010. Determine if it is available or excluded from wireless network 1010. Therefore, when the management terminal 1100 removes a communication terminal from the wireless network 1010, the communication terminal can be removed from the wireless network 1010 without notifying the communication terminal of the removal from the wireless network 1010. It is possible.
- the second embodiment it is possible to manage the communication terminals constituting the wireless network, and even if communication becomes impossible due to a change in the communication status between the communication terminals, By excluding the participating terminals, it is possible to construct a wireless network capable of directly communicating with all communication terminals participating in the wireless network.
- the other points are the same as those in the first embodiment.
- the determination in step C of the first or second embodiment is executed as follows. First, the communication terminal determines periodically the communication availability determination data to all participating terminals other than its own participating in the wireless network 1010 except for the management terminal 1100, and then transmits the communication availability determination data. This is executed by the receiving participating terminal determining whether or not communication is possible based on the received communication availability determination data.
- FIGs. 19 (a) and 19 (c) are flowcharts showing the operation of a communication terminal other than the management terminal according to the third embodiment of the present invention, and Fig. 19 (a) shows the transmission of communication availability determination data.
- FIG. 4B shows the operation, and
- FIG. 4C shows the operation of receiving the data for determining whether communication is possible.
- the operation of the communication terminal according to the third embodiment that configures a wireless network using FIGS. 19 (a) and (c) will be described.
- the operation of the management terminal 1100 in the third embodiment is the same as the operation of the management terminal in the first or second embodiment.
- the content of the communication availability determination step in the communication terminal is the communication availability determination step of FIG. 16 or FIG. 17 shown in the first or second embodiment (step S25 ).
- the network configuration management method according to the third embodiment differs from the first or second embodiment in that the communication availability determination step (step S25) shown in FIG. 16 or FIG. ) Is equivalent to the one replaced with the processing contents shown in). Therefore, in the third embodiment, only the operation of determining whether communication with a communication terminal other than the terminal itself participating in wireless network 1010 is possible will be described.
- the communication availability data includes the terminal identifier of each communication terminal, and the communication terminals 1200, 1300, and 1400 that are participating in the Izumi Network 1010 broadcast the communication availability determination data that includes their own terminal identifier. By transmitting the data periodically, each communication terminal can confirm that communication is possible from communication terminals other than itself that are participating in the wireless network 1010.
- the communication terminals 1200, 1300, and 1400 need to transmit data for determining whether communication is possible at a predetermined cycle
- the communication terminals 1200, 1300, and 1400 set a timer for transmitting data for determining whether communication is possible (step S31).
- the communication terminals 1200, 1300, and 1400 determine whether or not the data transmission timer for communication availability determination has expired (step S32). Is transmitted (step S33), and the data transmission timer for communication availability determination is reset (step S34). If the communication availability determination data transmission timer has not expired, communication terminals 1200, 1300, and 1400 are again in a state of waiting for communication availability determination data transmission.
- the communication terminals 1200, 1300, and 1400 receive the communication availability judgment data periodically transmitted from the communication terminals other than the communication terminals that are participating in the wireless network 1010 as needed (step S51). Using the terminal identifier included in the data, the terminal identifies from which communication terminal it was received. Thereafter, the communication terminals 1200, 1300, and 1400 can determine that the communication from the received communication terminal is possible, and update the communication availability information for the communication terminal (step S52). The communication terminals 1200, 1300, and 1400 perform a receiving operation each time they receive communication availability determination data from the communication terminal, and update the communication availability information.
- Each of the communication terminals 1200, 1300, and 1400 uses, for example, the latest reception time of the communication permission / inhibition data received from each communication terminal as the communication permission / inhibition information, and receives the communication permission / inhibition data from each communication terminal. Then, the communication availability information can be updated by updating the reception time of the communication availability determination data for the communication terminal.
- the communication terminals 1200, 1300, and 1400 set a timer for communication availability determination (step S41), and then determine whether the communication availability determination timer has expired (step S42). If the communication availability determination timer has not expired, the communication terminals 1200, 1300, and 1400 again wait for the communication availability determination timer to expire. When the communication availability judgment timer expires, the communication terminals 1200, 1300, and 1400 check the communication availability information for all communication terminals currently participating in the wireless network and perform communication availability determination with each communication terminal. Then (step S43), the communication availability determination timer is reset (step S44).
- the communication terminal 12 00, 1300, and 1400 transmit the communication availability determination result to the management terminal 1100 based on the communication availability determination result, as in the first embodiment (step S45).
- the communication terminals 1200, 1300, and 1400 use, for example, the latest reception time of the communication availability determination data received from each communication terminal as the communication availability information, and use the latest reception time and the current time received from each communication terminal. Are compared, and whether or not they are received within a predetermined time is confirmed. If the confirmation result is received within a predetermined time, the communication terminals 1200, 1300, and 1400 determine that communication from the communication terminal is possible.
- the communication terminals 1200, 1300, and 1400 determine that communication from the communication terminal is impossible. In this way, each of the communication terminals 1200, 1300, and 1400 is capable of making a semi-IJ decision for communication availability.
- all the communication terminals 1200, 1300, and 1400 except the management terminal 1100 participating in the wireless network 1010 perform the transmission of the communication availability determination data and the communication availability determination operation. This makes it possible to confirm whether communication is possible between all participating terminals.
- the communication terminals that make up the wireless network 1010 can be managed, and even if communication becomes impossible due to a change in the communication status between the communication terminals, participation can be prevented.
- By eliminating terminals it is possible to construct a wireless network that enables direct communication between all communication terminals participating in this wireless network.
- the other points are the same as those in the first or second embodiment.
- FIG. 20 shows the configuration of communication terminals 1200, 1300, and 1400 according to a modification of the first embodiment.
- the communication terminal in FIG. 20 includes a communication unit 1501, a participating terminal information receiving unit 1502, It has a determination unit 1503a, a communication availability determination result transmission unit 1504, an exclusion notification reception unit 1505, and an exclusion determination unit 1506a.
- FIG. 1501 shows the configuration of communication terminals 1200, 1300, and 1400 according to a modification of the first embodiment.
- the communication terminal in FIG. 20 includes a communication unit 1501, a participating terminal information receiving unit 1502, It has a determination unit 1503a, a communication availability determination result transmission unit 1504, an exclusion notification reception unit 1505, and an exclusion determination unit 1506a.
- FIG. 21 shows the configuration of communication terminals 1200, 1300, and 1400 according to a modification of the second embodiment.
- FIG. 22 shows the configuration of a management terminal 1100 according to a modification of the first embodiment.
- the management terminal in FIG. 22 includes a communication unit 1601, a participating terminal information transmitting unit 1602, a participation determination unit 1603, It has an exclusion notification transmitting unit 1604 and a communication availability determination result receiving unit 1605.
- FIG. 23 illustrates a configuration of a management terminal 1100 according to a modification of the second embodiment.
- the management terminal in FIG. 23 includes a communication unit 1601, a participation terminal information transmission unit 1602, a participation determination unit 1603, And a communication availability determination result receiving unit 1605.
- FIG. 24 is a diagram illustrating a configuration example of a wireless network 2110 to which the present invention is applied. As shown in FIG. 24, this network 2110 is configured so that direct communication can be performed between all terminals constituting the network 2110 without using an access point.
- a network 2110 includes wireless communication terminals 2101-2104.
- a double-headed arrow drawn by a solid line in FIG. 24 indicates that the terminals 2101-1104 can directly communicate with each other.
- one terminal serving as a management terminal exists in the network 2110.
- the management terminal grasps the terminals participating in the network 2110 and the communication band used in the network 2110, and notifies the managed terminal of each information.
- terminal 2101 is a management terminal and terminals 2102 to 2104 are managed terminals.
- the present invention is not limited to the power shown in the example of IEEE802.11a.
- the physical speed of a line is called a transmission rate
- the actual amount of data (excluding additional data such as a header portion) that can be transmitted on a line per unit time is referred to as a transmission rate.
- Called band the calculations performed in Embodiments 4 and 5 are rounded down to two decimal places.
- FIGS. 25A and 25B are flowcharts showing the operation of the management terminal 2101.
- FIG. 26 and FIG. 32 are diagrams illustrating examples of used band information generated by terminal 2101.
- FIG. Bandwidth information is transmitted over the network 2110. It indicates the usage status of the communication band, and is information including a transmitting terminal identifier, a receiving terminal identifier, a used communication band, a used transmission rate, and a band usage rate.
- FIG. 27 is a diagram showing an example of a transmission rate of IEEE802.11a and a communication band usable at the transmission rate in the network 2110.
- FIG. 29 is a diagram showing an example of the maximum transmission rate that can be used for communication between terminal 2102 and terminals 2101, 2103, and 2104.
- FIGS. 30 and 33 are diagrams showing examples of communication bands that can be used for communication between terminal 2102 and terminals 2101, 2103, and 2104, respectively.
- FIG. 31 is a diagram showing a configuration of a network 2110a in which AV (audiovisual) devices are connected to terminals 2101 2104.
- the management terminal 2101 has participating terminal information composed of terminal information of the terminals 2101-2104 participating in the network 2110. As described later, the terminals 2101-2104 can grasp the terminals participating in the network 2110 based on the participating terminal information.
- the management terminal 2101 checks the participating terminal information at a predetermined cycle, as described below.
- step S2201 the management terminal 2101 sets a participating terminal confirmation timer. Thereafter, the operation proceeds to step S2202, and the management terminal 2101 checks whether the participation terminal check timer has expired. If the participating terminal confirmation timer has not expired, the management terminal 2101 repeats step S2202 until it expires.
- the management terminal 2101 advances the operation to step S2203, and confirms the terminals (hereinafter also referred to as participating terminals) 2102 2104 participating in the network 2110.
- step S2204 a method is considered in which confirmation data is transmitted to the participating terminal by broadcast, and the participating terminal returns a confirmation response to the management terminal 2101 in response to the confirmation data.
- step S2204 the management terminal 2101 updates the participating terminal information stored therein based on the confirmation contents in step S2203.
- step S2205 the management terminal 2101 notifies each participating terminal of the participating terminal information by broadcasting.
- step Proceeding to S2206 the management terminal 2101 resets the participating terminal information confirmation timer, then proceeds to step S2202 again, and waits for participating terminal confirmation.
- step S2211 the management terminal 2101 receives transmission information from the terminals 2102 to 2104.
- the transmission information is information including a transmission terminal identifier, a reception terminal identifier, a used communication band, and a used transmission rate.
- the terminals 2102-2104 each notify (transmit) the transmission information to the management terminal 2101, as information relating to the band used for data transmission by itself.
- step S2212 the management terminal 2101 generates and updates used band information on the band used in the network 2110 based on the received transmission information.
- FIG. 26 shows an example of the used bandwidth information. As shown in FIG.
- the terminal 2104 uses a communication bandwidth of 9 Mbps at a transmission rate of 48 Mbps with respect to the management terminal 2101, and the terminal 2104 transmits 5.5 Mbps at a transmission rate of 36 Mbps with respect to the terminal 2103. You are using a communication band.
- step S2212 based on the transmission rate and the upper limit of the communication band shown in FIG. 27, a calculation is made as to how much the communication band is used.
- the transmission rate from terminal 2104 to terminal 2103 is 36 Mbps
- the communication band corresponding to the transmission rate of 36 Mbps is 22 Mbps.
- step S2213 management terminal 2101 communicates with terminal 2102 2104.
- the used bandwidth information updated in step S2212 is notified.
- This used band information notification is periodically performed to the terminals 2102-2104 that visit the network 2110, for example, similarly to the participation terminal information notification in step S2205 described above.
- the terminals 2102 and 2104 can periodically grasp the band used by the network 2110.
- the management terminal 2101 uses the bandwidth used for all of the terminals 2102 to 2104 that have made the notification request or that have joined the network 2110. You may give us information.
- the management terminal 2101 does not notify the used bandwidth information unless a new notification request is generated, so that communication traffic in the network 2110 can be prevented from increasing as much as possible.
- terminals 2102-2104 will be described using FIGS. 28 (a) to 28 (d).
- step S2501 the terminals 2102 to 2104 each receive the participation terminal information transmitted periodically from the terminal 2101.
- step S2502 the terminals 2102-2104 update their own participating participant information based on the received content in step S2501.
- step S2511 the terminal 2102—2104 receives the used band information from the terminal 2101.
- step S2512 the terminal 2102-1204 updates the used bandwidth information stored by itself, based on the received content in step S2511.
- step S2531 when the terminal 2102—2104f, in other words, receives the terminal information that is lost or lost, the terminal 2102—2104f connects to the network 2110 based on the received participating terminal information.
- the maximum transmission rate at which communication with each terminal other than the participating terminal is possible is determined.
- communication with the terminal to be communicated is performed at least once in descending order from the transmission rate of 54 Mbps, and when communication can be normally performed a predetermined number of times, It is determined that communication with the terminal at the transmission rate is possible.
- the operation proceeds to step S2532, and the terminals 2102-2104 update the communication band management information based on the above-described transmission rate determination result and the used band information, respectively.
- the communication band management information indicates a communication band in which a certain terminal can communicate with each terminal other than itself in the network 2110.
- the terminal 2102 has a transmission rate of 48 Mbps to the terminals 2101 and 2103.
- the communication band corresponding to the transmission rate of 48 Mbps is 27 Mbps.
- the transmission rate from terminal 2102 to terminal 2104 is 12 Mbps.
- the communication band corresponding to the transmission rate of 12 Mbps is 9 Mbps.
- the communication band management information is updated in step S2532 by using the communication band calculated as described above.
- the network 211CH of Fig. 24 shows the configuration of the network 2110a connected to each of terminals 2101 and 2104 (TV2801, STB (set top box) 2802, TV2803, 2804)
- the TV2801 is connected to the network 2110a using the management terminal 2101
- the TV2801 is connected to the network 2110a using the TV2801 that has the wireless communication terminal function of the terminal 2101.
- the same effect can be achieved even when directly connected: the same applies to the connection between terminal 2102 and STB2802, the connection between terminal 2103 and TV2803, and the connection between terminal 2104 and TV2804. .
- the operation of distributing stream data, such as a moving image, to the STB2802, STV2801, 2803, and 2804 is considered.
- the terminal 2102 attempts to transmit stream data to the terminals 2101, 2103, and 2104 in the network 2110a by using a broadcast.
- the terminal 2102f and the STB2802 refer to the above-described communication band management information based on the request from the STB2802, and transmit the communication band management information to itself. A comparison is made with a communication band required for transmission to determine whether transmission is possible.
- the communication band management information is as shown in FIG. 30, if terminal 2102 tries to transmit 5 Mbps stream data, the result of the transmission determination indicates that 5 Mbps is smaller than the available communication band shown in FIG. Therefore, it is determined that transmission using the transmission rate of 48 Mbps is possible for the terminals 2101 and 2103. Terminal 2102 cannot transmit to terminal 2104 because 5 Mbps is larger than the usable communication band shown in FIG. 30 (that is, 5 Mbps> 3.7 Mbps) as a result of the transmission determination. Judge that there is.
- step S2542 the terminal 2102 transmits the transmission terminal identifier, reception
- the transmission information including the terminal identifier, the used communication band, and the used transmission rate is transmitted.
- the terminal 2102 manages transmission information in which the transmitting terminal identifier is the terminal 2102, the receiving terminal identifiers are the terminals 2101 and 2103, the communication bandwidth used is 5 Mbps, and the used transmission rate is 48 Mbps. Send to 2101.
- the management terminal 2101 updates the used band information as shown in FIG. 32 based on the above-described operation, and sends the information to each terminal in the network 2110a. , And transmits the updated used bandwidth information.
- terminal 2102 receives the used band information shown in FIG. 32, and performs the operation as shown in FIG. 33 based on the used band receiving operation of FIG. 28 (b) and the communication band management operation of FIG. 28 (c). Calculate a usable communication band.
- the terminal 2102 has a transmission rate of 48 Mbps to the terminals 2101 and 2103.
- the transmission rate from terminal 2102 to terminal 2104 is 12 Mbps
- the communication band corresponding to the transmission rate of 12 Mbps is 9 Mbps.
- the transmission processing is not performed, and the fact that the transmission is impossible is determined by, for example, using a method such as blinking a red LED lamp. To notify the user. This allows the user to know that the stream data could not be transmitted by broadcast to the terminal 2102 and the S terminal 2104.For example, by using a method described later in Embodiment 5, Based on the 33 available communication bands, measures may be taken such as transmitting to the terminal 2104 the stream data converted to 2.0 Mbps that can be transmitted.
- the communication band management information is as shown in FIG. 30, consider the operation when delivering 3 Mbps stream data to STB2802 STV2801, 2803, 2804.
- terminal 2 102 attempts to transmit 3 Mbps stream data using broadcast, a transmission rate of 12 Mbps is used for terminals 2101, 2103, and 2104 in accordance with the transmission rate of terminal 2104 shown in FIG. It is determined that transmission is possible.
- the terminal 2102 transmits, to the terminal 2101, the terminal 2101 having the transmission terminal identifier of the terminal 2102, the reception terminal identifiers of the terminals 2101, 2103, and 2104, the transmission bandwidth of 3 Mbps, and the transmission rate of 12 Mbps.
- Send to the terminal 2101 the terminal 2101 having the transmission terminal identifier of the terminal 2102, the reception terminal identifiers of the terminals 2101, 2103, and 2104, the transmission bandwidth of 3 Mbps, and the transmission rate of 12 Mbps.
- terminals 2102-2104 notify terminal 2101 of transmission information, and transmit information received by terminal 2101. It operates to notify the terminal 2102-2104 of the used bandwidth information generated based on the information. Therefore, even when the transmission rate is changed, it is possible to appropriately manage the communication band.
- Embodiment 4 since a network that enables direct communication between wireless communication terminals without using an access point is configured, communication is performed using the access point and using the access point. A larger communication band can be used compared to a network.
- PLC Power Line Communication
- terminal 2101 when terminal 2101 confirms a terminal participating in network 2110, it does not use a broadcast that transmits participating terminal confirmation data by broadcast, but uses a unicast or the like. The same effect can be obtained even if the participant terminal confirmation data is transmitted using.
- Embodiment 4 as a method for each terminal to determine the transmission rate, communication is performed at least once in descending order from the 54 Mbps transmission rate with the terminal in the network, and the terminal normally performs the predetermined number of times or more. If it is possible to perform communication, it is determined that communication at that transmission rate is possible.However, the present invention is not limited to this. Communication with terminals in a network is performed at least once in ascending order from the 6 Mbps transmission rate. It is also possible to take a method such as performing communication and determining that communication at the transmission rate is possible if communication can be normally performed a predetermined number of times or more at a certain transmission rate.
- FIG. 34 is a flowchart showing a data transmission operation of terminals 2102-2104 according to Embodiment 5. Note that operations other than the data transmission operation of terminals 2102-2104 are the same as those in the fourth embodiment.
- a 5 Mbps stream for STB2802 power STV2801, 2803, and 2804 is transmitted to fb-free fountain network 2110a as shown in FIG.
- the operation when distributing data will be described.
- terminal 2102 performs the same operation as in the fourth embodiment, such as the participation terminal information reception operation in FIG. 28 (a), the used band information reception operation in FIG.
- the communication band management operation of 28 (c) is performed.
- terminal 2102 performs a data transmission operation as shown in FIG. 34 based on the request from STB2802.
- a transmission data conversion process S2551
- a transmission information notification operation step S2551
- the point of performing S2543) is different from the data transmission operation (FIG. 28 (b)) in Embodiment 4 in which the transmission information notification operation (step S2543) is performed when it is determined that transmission is impossible (step S2542).
- step S2541 when terminal 2102 tries to deliver 5 Mbps stream data, it is determined in step S2541 whether or not transmission is possible. That is, transmission permission / inhibition determination is performed, and it is determined in step S2542 that transmission to terminal 2104 is impossible.
- step S2551 the terminal 2102 performs transmission data conversion processing by re-encoding the stream data or transcoding the stream data into a data format having a higher compression rate.
- the terminal 2102 and the terminal 2104 can have a communication bandwidth of 3.7 Mbps, so the stream data of 5 Mbps requested to be transmitted is recoded or transcoded to obtain the resolution. Is converted to 3.7 Mbps equivalent. Then, the converted stream data is transmitted to the terminals 2101, 2103, and 2104 at a transmission rate of 12 Mbps. By operating in this manner, the terminal 2102 can transmit stream data to all of the terminals 2101, 2103, and 2104 that visit the network 2110a.
- the terminal 2102 includes a transmitting terminal identifier, a receiving terminal identifier, a used communication band, and a used transmission rate for the terminal 2101 in step S2543 based on the converted communication band.
- Send transmission information the terminal 2102 determines that the transmitting terminal identifier specifies the terminal 2102. 102 ", which identifies the receiving terminal IJ child S terminal 2101, 2103, 2104" 2101 "," 21
- the stream data converted to 3.7 Mbps is broadcast from terminal 2102 to terminals 2101, 2103, and 2104.
- the terminal 2102 can use a communication band of up to 11.2 Mbps using the transmission rate of 48 Mbps for the terminals 2101 and 2103. Therefore, the terminal 2102 may transmit the unconverted stream data of 5.0 Mbps to the terminals 2101 and 2103.
- the stream data that can be transmitted from terminal 2102 to terminal 2104 is 2.0 Mbps. Therefore, terminal 2102 converts 5.0 Mbps stream data into 2.0 Mbps and transmits it to terminal 2104. By operating in this manner, the terminal 2102 can transmit stream data to all of the terminals 2101, 2103, and 2104 participating in the network 2110a while maintaining the quality. Then, as in Embodiment 4, in step S2543, terminal 2102 transmits to terminal 2101 a transmission terminal identifier, a reception terminal identifier, a used communication band, and a used transmission rate, based on the converted communication band. Submit information.
- the terminal 2102 has the transmitting terminal identifier “2102” identifying the terminal 2102, the receiving terminal identifiers “2101” and “2103” identifying the terminals 2101 and 2103, and the communication band used.
- the transmission information whose transmission rate is 5 Mbps and the transmission rate used is 48 Mbps
- the transmission terminal identifier is "2102" that specifies terminal 2102
- the reception terminal identifier is "2104" that specifies terminal 2104
- the communication bandwidth used is Transmission information having a transmission rate of 2 Mbps and a transmission rate of 12 Mbps is transmitted to the management terminal 2101.
- the network bandwidth management method according to the fifth embodiment even when it is determined that transmission is not possible in the currently available communication band when a transmission request is issued, transmission is performed. It operates by converting the data so that it falls within the bandwidth that can be used for communication. Therefore, the network bandwidth management method according to the fifth embodiment has the effect of the fourth embodiment, and also maximizes the usable communication bandwidth even when the communication bandwidth required for transmission is insufficient. There is an effect that data transmission can be performed by using it to the maximum.
- terminal 2102 performs conversion of stream data.
- the present invention is not limited to this, and streams are transmitted to devices such as STBs and TVs connected to terminals.
- the same effect can be obtained by configuring to have a function to convert data, or by installing a device with a function to convert stream data between the terminal and each device such as STB or TV. To play.
- FIG. 35 is a diagram showing a configuration example of a network 3110 targeted by the present invention.
- this wireless network 3110 is configured so that all terminals constituting the wireless network 3110 can directly communicate without using an access point.
- a wireless network 3110 includes wireless communication terminals 3101 to 3104.
- reference numeral 3105 denotes a wireless communication terminal (participation requesting terminal) that is to newly join the wireless network 3110.
- a double-headed arrow drawn by a solid line in FIG. 35 indicates a state in which direct communication can be performed between wireless communication terminals.
- a description will be given on the assumption that one management terminal exists in the wireless network 3110 and the wireless communication terminal 3101 is the management terminal.
- the management terminal 3101 is a terminal that manages the network configuration of the wireless network 3110.
- the management terminal 3105 and the wireless network 3110 It confirms the communication status between all terminals in the network, determines whether or not the participation condition of the wireless network 3110 is satisfied, and notifies the participation requesting terminal 3105 of participation permission or non-permission.
- the management terminal 3101 transmits to the terminals 3102 to 3104 participating in the wireless network 3110 the communication status with all the participating terminals other than its own in the wireless network 3110 transmitted from the participating terminals 3102 to 3104. Is checked, and it is determined whether or not each participating terminal 3102 3104 satisfies the wireless network participation condition.
- the management terminal 3101 periodically manages the network configuration by distributing the network configuration to the participating terminals 3102 and 3104 and notifying the network configuration. Also, the participation requesting terminal 3105 that is going to newly join the wireless network checks the information of the terminal participating in the wireless network (participating terminal information) transmitted from the management terminal 3101, Examine the communication status with all the terminals participating in the wireless network 3110 based on the participating terminal information, transmit a participation request and the communication status to the management terminal 3101, and notify the participation permission from the management terminal 3101. Can join the wireless network 3110 if it is done.
- the present embodiment shows an example in the case of IEEE802.11a, and the present invention is not limited to this. Also, in this specification, the physical speed of a line is called a transmission rate.
- FIG. 36 is a flowchart illustrating an operation of a participation request of a participation request terminal 3105 newly participating in the wireless network 3110 according to the sixth embodiment.
- FIG. 37 is a flowchart showing the operation of transmitting the participation terminal information of the management terminal 3101 according to the sixth embodiment.
- FIG. 38 is a flowchart showing the operation of the management terminal 3101 of the sixth embodiment for receiving a participation request.
- FIG. 39 shows an example of the transmission rate determination information between the participation requesting terminal 3105 and the wireless communication terminals 310 1 to 3104 participating in the wireless network 3110 according to the sixth embodiment.
- FIG. 40 is a flowchart illustrating an operation example of the participation request terminal 3105 according to the sixth embodiment when determining the transmission rate.
- FIGS. 41 and 42 show examples of participant terminal information transmitted by the management terminal 3101 of the sixth embodiment.
- the management terminal 3101 of the wireless network 3110 has participating terminal information composed of terminal information of a wireless communication terminal participating in the wireless network 3110.
- the management terminal 3101 can recognize the wireless communication terminal participating in the wireless network 3110 based on the participating terminal information.
- the participating terminal information shown in FIG. 41 indicates that the wireless network 3110 is composed of the management terminal 3101 and the participating terminals 3102 to 3104.
- the participating terminal information transmitting operation of the management terminal 3101 will be described.
- the management terminal 3101 transmits participating terminal information at a predetermined cycle. As shown in FIG. 37, in the sixth embodiment, management terminal 3101 first sets a participation terminal information transmission timer (step S3301).
- the management terminal 3101 determines whether or not the participation terminal information transmission timer has expired (step S3303), and, if the participation terminal information transmission timer has expired, broadcasts the participation terminal information held by itself and broadcasts it. Network 3110 (Step S3304), and reset the participating terminal information transmission timer (step S3305). In step S3303, if the participation terminal information transmission timer has not expired, the management terminal 3101 is again in a state of waiting for participation terminal information transmission.
- the participation requesting terminal 3105 firstly participates in determining whether or not participating terminal information periodically transmitted by broadcast from the management terminal 3101 is receivable.
- Set the terminal information reception timer step S3201.
- the participation requesting terminal 3105 checks whether the participation terminal information reception timer has expired (step S3202). When the timer expires, the participation requesting terminal 3105 determines that communication with the management terminal 3101 of the network 3110 is impossible, and determines that participation in the network is impossible.
- the participation request terminal 3105 checks whether or not the participation terminal information transmitted from the management terminal 3101 has been received (step S3203). In this case, the participant terminal information reception timer is again checked for expiration. Upon receiving the participating terminal information, the participation requesting terminal 3105 can use the participating terminal information to directly communicate with a wireless communication terminal that is participating in the wireless network 3110 other than its own by using each transmission rate. Is checked, and whether or not communication with each wireless communication terminal is possible (that is, whether communication is possible) and the transmission rate at which communication is possible are determined (step S3204). When receiving the participation terminal information in FIG.
- the participation requesting terminal 3105 determines whether or not communication with the wireless communication terminals 3101 to 3104 is possible and the transmission rate at which communication is possible.
- An example of the transmission rate determination operation will be described with reference to FIG.
- the participation requesting terminal 3105 confirms the communication with each of the wireless communication terminals 310 1 to 3104 of the wireless network 3110 in descending order from the transmission rate of 54 Mbps, and determines the communicable transmission rate.
- the participation requesting terminal 3105 performs communication at 54 Mbps and checks whether communication is possible (step S4101). If there is a response to the communication from the communication partner, the participation requesting terminal 3105 determines that communication is possible at 54 Mbps, and the determination result of the communicable transmission rate determines that communication is possible at 54 Mbps or less.
- a lower transmission rate can cover a wider range where errors are less likely to occur in terms of modulation scheme and coding rate than a higher transmission rate. Therefore, if the participation request terminal 3105 can communicate at a certain transmission rate, it can determine that communication is possible even when a lower transmission rate is used. If there is no response to communication from the communication partner when communicating at 54 Mbps, the participation request terminal 3105 determines that communication is not possible at 54 Mbps and then checks whether communication is possible at the lower transmission rate of 48 Mbps (Step S4102). Similarly, the participation requesting terminal 3105 checks whether or not communication is possible in descending order of the transmission rate, and determines whether or not communication is possible at a lower transmission rate (step S4103—S4108). ).
- the participation requesting terminal 3105 determines that communication is not possible between the communication terminals if the communication is not possible. As in the above example, the participation requesting terminal 3105 can determine the communicable transmission rate between the communication terminals.
- the participation requesting terminal 3105 determines the transmission rate with each of the wireless communication terminals participating in the wireless network 3110, and then transmits a participation request including the transmission rate determination information.
- the information is transmitted to the management terminal 3101 (step S3205).
- the participation request terminal 3105 receives the participation determination result with respect to the participation request, and confirms whether or not participation in the wireless network 3110 is possible (that is, whether or not participation is possible) with reference to the received participation determination result (step S3206).
- the participation requesting terminal 3105 determines that it is possible to participate in the wireless network 3110 when the participation determination result indicates that participation is possible, and disables participation in the wireless network 3110 when the participation determination result indicates that participation is impossible. Is determined, and the participation request operation ends.
- FIG. 39 shows an example of the transmission rate determination between the participation requesting terminal 3105 and each of the wireless communication terminals 3101 to 3104 in the wireless network 3110 in the transmission rate determining step S3204.
- a mark “ ⁇ ” indicates that communication is possible
- a mark “X” indicates that communication is not possible.
- the participation request terminal 3105 is capable of communicating with the wireless communication terminal 3101 at a transmission rate of 6 Mbps, 9 Mbps, 12 Mbps, 18 Mbps, 24 Mbps, 36 Mbps, and 48 Mbps. Communication using the power is not possible.
- the user can know that he or she could not join the network 3110, and the user can take appropriate measures such as moving the installation location to a terminal that could not join the wireless network 3110.
- the management terminal 3101 receives the participation request transmitted from the participation requesting terminal 3105 (step S3401), refers to the transmission rate determination information included in the received participation request, and On the other hand, it is determined whether it is possible to participate in the wireless network 3110 (step S3402). For example, when handling a 20 Mbps video stream in the wireless network 3110, the effective communication bandwidth is less than 20 Mbps when the transmission rate at which the participation request terminal 3105 can communicate is 24 Mbps or less (see Figure 27). 20Mbps video stream cannot be transmitted to all wireless communication terminals participating in 3110.
- each wireless communication terminal must have a transmission rate of 36 Mbps or more (the communication bandwidth is 22 Mbps as shown in Figure 27) as a condition for participating in the wireless network.
- the transmission rate determination information included in the received participation request is shown in FIG.
- the participation requesting terminal 3105 communicates with all the terminals in the wireless network 3110 at a transmission rate of 36 Mbps or more.
- the management terminal 3101 transmits to the participation request terminal 3105 a participation determination result indicating whether or not the participation request terminal 3105 can participate in the participation request (step S3403).
- the participating terminal information is included to include the terminal identifier of the wireless communication terminal that has requested participation to reconfigure the wireless network 3110. Is updated (step S3405).
- FIG. 42 shows an example of updated participating terminal information.
- the management terminal 31 01 broadcasts the updated participant terminal information to the communication terminals in the wireless network 3110 (step S3406). If it is determined that the participation request terminal 3105 cannot participate, the management terminal 3101 terminates the process for receiving the participation request from the participation request terminal 3105 because the wireless network 3110 is not changed.
- a new terminal can be made to participate in wireless network 3110, and by transmitting participating terminal information including the identifier of the newly participating terminal to the network, It is possible to construct a wireless network that allows direct communication at a predetermined or higher transmission rate among all wireless communication terminals participating in the network. Therefore, it is possible to configure a network that satisfies a certain or higher communication quality required for transmitting stream data such as video on a newly constructed network. Also, by grasping the transmission rate at which communication is possible, communication using the maximum transmission rate at which communication is possible can be performed, so communication using low transmission rates can be reduced and network use can be made more efficient. It becomes possible.
- FIG. 43 is a flowchart illustrating the operation of the wireless communication terminals 3102 to 3104 according to the seventh embodiment.
- FIG. 44 is a flowchart showing an operation of receiving transmission rate determination information by the management terminal 3101 according to the seventh embodiment.
- FIG. 45 shows an example of transmission rate determination information between the wireless communication terminal 3104 of the seventh embodiment and wireless communication terminals other than the wireless communication terminal 3104 participating in the wireless network 3110.
- FIG. 46 is a flowchart illustrating an example of the operation of determining whether or not the communication terminal can participate in the transmission rate determination information receiving operation of the management terminal in FIG. FIG.
- FIG. 47 shows an example of transmission rate determination information between the wireless communication terminal 3102 of the seventh embodiment and wireless communication terminals other than the wireless communication terminal 3102 participating in the wireless network 3110.
- FIG. 48 shows an example of transmission rate determination information between the wireless communication terminal 3103 of the seventh embodiment and wireless communication terminals other than the wireless communication terminal 3103 participating in the wireless network 3110.
- FIG. 49 shows an example of the priority of each communication terminal participating in the wireless network 3110 according to the seventh embodiment.
- FIG. 50 shows an example of participating terminal information transmitted by the management terminal 3101 according to the seventh embodiment.
- Figure 51 shows the network when network restructuring was performed. It is a figure showing the example of composition of a work.
- FIGS. 52 and 55 show examples of the terminal exclusion list in the operation of determining whether or not the management terminal 3101 of the seventh embodiment can participate.
- FIG. 53 and FIG. 54 are obtained by removing the transmission rates of the management terminal 3101 and the terminal 3104 from the transmission rate determination information of the terminal 3102 and the terminal 3103 of the seventh embodiment.
- the operation of the participating terminal information transmission process of the management terminal 3101 is the same as in the case of Embodiment 6 (FIG. 37).
- the management terminal 3101 receives the transmission rate determination information from the wireless communication terminals 3102-3104 (step S3601).
- the transmission rate determination information confirms the transmission rate at which each wireless communication terminal 3101 3104 can directly communicate with all wireless communication terminals other than its own that are participating in the wireless network, and can communicate with its own terminal. And a transmission rate at which communication with the wireless communication terminal is possible.
- the management terminal 3101 determines which wireless communication terminal can continue to participate in the wireless network 3110 (ie, whether or not it can participate) (step S3602).
- FIG. 45 shows an example of transmission rate determination information between the wireless communication terminal 3104 and each of the wireless communication terminals 3101 to 3103 in the wireless network 3110.
- a mark “ ⁇ ” indicates that communication is possible
- a mark “X” indicates that communication is not possible.
- FIG. 45 shows that, for example, the communication terminal 3104 and the management terminal 3101 can communicate at a transmission rate of 24 Mbps or less.
- the transmission rates at which the communication terminal 3102 and the communication terminal 3103 can communicate with the management terminal 3101 are different. Since they are 48 Mbps and 36 Mbps respectively, they meet the participation conditions. As shown in FIG. 45, the communication terminal 3104 and the management terminal 3101 have communicable rates of 24 Mbps or less, and do not satisfy the participation conditions. Therefore, the management terminal 3101 adds the communication terminal 3104 to the excluded terminal list (FIG. 52). Here, the management terminal 3101 does not add to the terminal exclusion list if the transmission rates at which all the terminals can communicate with the management terminal satisfy the participation conditions.
- the management terminal 3101 satisfies the conditions for participation in the network 3110 by using the transmission rate information of the management terminal and the terminal excluding the exclusion terminal list from the transmission rate determination information (FIGS. 53 and 54). It is confirmed whether or not (step S4103). From the transmission rate information shown in FIGS. 53 and 54, the communicable transmission rate between the terminal 3102 and the terminal 3103 is 18 Mbps or less, which does not satisfy the conditions for joining the network 3110. Using the priority shown as an example in FIG. 49, it is determined which of the terminal 3102 and the terminal 3103 is excluded from the network 3110 from the network 3110. The priority in Fig. 49 indicates that the smaller the number, the higher the priority.
- the method of assigning priority to each terminal is, for example, a method given by a user when constructing a network, or, for example, monitoring the frequency of use of each terminal and increasing the frequency of use for frequently used devices such as a television in a living room. It is possible to assign a priority and assign a priority according to the frequency of use, such as assigning a low priority to equipment with low usage frequency such as television between customers. By giving priority according to the frequency of use of devices, the frequency of frequently used devices is less likely to be excluded from the network, so that frequently used devices are retained as much as possible (i.e., not excluded from the network) ). In the priority shown in FIG.
- management terminal 3101 adds terminal 3103 to the terminal exclusion list (step S4104 in FIG. 46), and FIG.
- the terminal exclusion list is updated as shown in (1), and the process of step S4103 is performed again.
- the management terminal 3101 terminates the participation determination process because the transmission rate at which communication is possible between all communication terminals other than the terminal exclusion list satisfies the conditions for participation in the network 3110.
- the management terminal 3101 deletes the terminal information of the wireless communication terminal to be excluded from the participating terminal information held by itself. To update the participating terminal information (step S36 in FIG. 44).
- an exclusion notification is sent to the wireless communication terminal excluded from the wireless network 3110 (step S3605 in FIG. 44). Then, the management terminal 3101 enters a state of receiving the transmission rate determination information again (step S3601 in FIG. 44). When there is no wireless communication terminal to be excluded from the wireless network 3110, the management terminal 3101 is again in a state of receiving the transmission rate determination information. For example, when the wireless communication terminals 3103 and 3104 are excluded from the network as shown in the terminal exclusion list in FIG. 55, the management terminal 3101 uses the wireless communication terminals 3103 and 3104 from the participating terminal information as shown in FIG.
- the wireless communication terminals 3103 and 3104 are removed from the network 3110 by deleting and updating the information of the wireless communication terminals 3103 and 3104, and the wireless communication terminals 3103 and 3104 are removed from the network 3110 as shown in FIG. Eliminate, 3104, and rebuild a new wireless network 3110a.
- each wireless communication terminal can receive the updated participant terminal information and confirm that the wireless network 3110 has been reconstructed by confirming the updated participant terminal information. Also, when communication with the management terminal 3101 becomes impossible and transmission rate determination information from the wireless communication terminal cannot be received, the terminal information of the wireless communication terminal is deleted from the participating terminal information and the participating terminal information is updated. Thus, it is possible to exclude the wireless network 3110 from the wireless network 3110.
- a means such as displaying a terminal identifier of the excluded wireless communication terminal on an LCD (for example, a display unit shown in FIG. 2). 1104 or means corresponding to the display unit 2104 shown in FIG. 4). Then, the user can know which terminal has been removed and the configuration of the wireless network has changed, and can take appropriate measures such as placing the removed terminal in a place where communication is possible. .
- each wireless communication terminal 3102 3104 configuring the wireless network of the seventh embodiment receive participating terminal information in order to determine whether or not participating terminal information periodically transmitted by broadcast from the management terminal 3101 is receivable.
- Set the timer (step S3501).
- the wireless communication terminals 3102 to 3104 confirm whether the participating terminal information reception timer has expired (step S3502).
- the wireless communication terminals 3102 to 3104 determine that communication with the management terminal 3101 of the wireless network 3110 has been disabled, and determine that participation in the wireless network has been disabled.
- the wireless communication terminals 3102 and 3104 check whether or not the participating terminal information transmitted from the management terminal 3101 has been received (step S3503). Then, the participant terminal information reception timer is again checked for expiration. Upon receiving the participating terminal information, the wireless communication terminals 3102 to 3104 reset the participating terminal information reception timer (step S3504), and use the participating terminal information to use each wireless communication terminal participating in a wireless network other than its own. The transmission rate at which communication is possible directly with the terminal is confirmed, and the transmission rate at which communication with each wireless communication terminal is possible is determined (step S3505).
- the method of determining whether communication with each wireless communication terminal is possible and the transmission rate at which communication is possible should use the same method as the transmission rate determination in step S3204 in the participation request processing operation of the wireless communication terminal according to the sixth embodiment.
- the communicable transmission rate can be determined.
- the wireless communication terminal After determining the transmission rate with each wireless communication terminal participating in the network, the wireless communication terminal determines the transmission rate indicating the transmission rate at which communication with each wireless communication terminal is possible based on the determination result.
- the information is transmitted to the management terminal 3101 (step S3 506).
- the wireless communication terminals 3102 to 3104 confirm whether or not the exclusion notification has been received from the management terminal 3101, and determine whether or not their own terminal can continue to participate in the wireless network. A judgment is made (step S3507). For example, each of the wireless communication terminals 3102 to 3104 transmits transmission rate determination information as shown in FIGS. 47, 48, and 45 to the management terminal 3101, and the management terminal 3101 transmits a removal notification to the communication terminal 3104. If so, the communication terminal 3104 becomes unable to participate in the network 3110 and determines that it has been excluded from the network 3110.
- the communication terminal determines that its own terminal has been removed from the wireless network 3110, the communication terminal uses a means such as blinking a red LED of the LED to notify that the own terminal has been removed from the wireless network 3110. And notify the user. And the user can know that the terminal has been removed. Appropriate measures can be taken, such as moving the installation site for the removed terminal. If the communication terminal does not receive the exclusion notification from the management terminal 3101 and determines that its own terminal can continue to participate in the wireless network 3110, the communication terminal waits again for the expiration of the participation terminal information reception timer (step S3502).
- the wireless communication terminals constituting wireless network 3110 can be managed, the communication status between the terminals changes, and transmission is enabled for communication with the wireless communication terminal. Even if the rate no longer satisfies the participation conditions of the network 3110, build a wireless network that allows direct communication at a predetermined rate or higher between all wireless communication terminals participating in this network Thus, it is possible to configure a network that satisfies a certain or more communication quality required for transmitting stream data such as video on the network. Also, by grasping the communicable transmission rate, communication using the maximum communicable transmission rate can be performed, so communication using low transmission rates can be reduced and the network can be used efficiently. .
- FIG. 56 is a flowchart illustrating operations of the wireless communication terminals 3102 to 3104 according to the eighth embodiment.
- FIG. 57 is a flowchart showing an operation of receiving transmission rate determination information by management terminal 3101 of the eighth embodiment.
- wireless communication terminals 3102 to 3104 in the eighth embodiment configuring the wireless network 3110 will be described with reference to FIG.
- steps S350 1, S3502, and S3503 wireless communication terminals 3102-3104 operate in the same manner as in the seventh embodiment (FIG. 43).
- the wireless communication terminals 3102 to 3104 Upon receiving the participating terminal information transmitted from the management terminal 3101 in step S3503, the wireless communication terminals 3102 to 3104 check whether the received participating terminal information includes their own terminal information. If the terminal information is included, it is determined that the own terminal can continue to join the wireless network 3110.If the terminal information is not included, the own terminal joins the wireless network 3110. It is determined that it has become impossible (step S3508).
- Participating terminal information is excluded from the wireless network 3110 based on the transmission rate judgment information received from the management terminal 3101 from each wireless communication terminal 310 2—3104. By checking the participating terminal information to delete and update the terminal information of the wireless communication terminal to be used, it is possible to determine whether or not the own terminal has been excluded while participating in the wireless network 3110.
- step S3504 If the wireless communication terminals 3102 and 3104 can continue participating in the wireless network 3110, the wireless communication terminals 3102 and 3104 reset the reception timer (step S3504) as in the case of Embodiment 7 (Fig. 43). ), Transmission rate judgment (step S3505), transmission rate judgment information to the management terminal 3101 (step S3506), and the participant terminal information reception timer waits for expiration again (step S3502).
- the management terminal 3101 of the eighth embodiment is different from the management terminal 3101 of the seventh embodiment in the operation of receiving the transmission rate determination information (FIG. 44) by eliminating the wireless network 3110 power.
- the elimination notification step (step S3605 in FIG. 44) is removed from the communication terminal, and the operation is performed.
- the management terminal 3101 of the eighth embodiment performs the same operation as the transmission rate determination information receiving operation in each of steps S3601 to S3604 of the seventh embodiment (FIG. 44).
- the participation terminal information is updated in step S3604, the state returns to receiving the transmission rate determination information (step S3601).
- the wireless communication terminals 3102 to 3104 can confirm that the own terminal can continue to participate in the wireless network 3110 by confirming the participating terminal information transmitted by the management terminal 3101. If the management terminal 3101 removes a wireless communication terminal from the wireless network 3110 to determine whether or not the wireless communication terminal has been removed from the wireless network 3110, the management terminal 3101 can send the wireless communication terminal without notifying the wireless communication terminal of the removal. Can be eliminated from the wireless network 3110. For example, if the management terminal 3101 retains the participating terminal information as shown in FIG. 41 before receiving the transmission rate determination information of each wireless communication terminal, it joins the wireless network 3110.
- the management terminal 3101 deletes the wireless communication terminals 3103 and 3104 from the participating terminal information and updates the participating terminal information as shown in FIG.
- the updated participating terminal information is transmitted to each of the wireless communication terminals 3102 to 3104 by the participating terminal information transmitting operation of the management terminal 3101, and each wireless communication terminal refers to the participating communication terminal information, It can determine whether or not its own terminal can participate in the network, and can reconstruct the network.
- the wireless communication terminal 3102 can continue to participate in the wireless network 3110, but the wireless communication terminals 3103 and 3104 are excluded from the network and cannot participate in the network. It is possible to determine that it has become.
- the eighth embodiment it is possible to manage the wireless communication terminals configuring the wireless network, change the communication state between the terminals, and change the transmission rate at which communication with the wireless communication terminal is possible.
- Wireless network that can directly communicate at a predetermined rate or higher among all wireless communication terminals participating in this network even if the
- a network that satisfies a certain or higher communication quality required for transmitting stream data such as video on the network can be configured.
- communication using the maximum transmission rate at which communication is possible can be performed, so communication using low transmission rates can be reduced and networks can be used efficiently. It becomes.
- Embodiments 6 to 8 described above a hardware (H / W) configuration as shown in FIGS. 58 to 61 is used as a power communication terminal as described in the case where the network configuration management method is executed based on software. And the functions described in the above-mentioned Embodiments 6 to 8 may be provided.
- FIG. 58 shows the configuration of a communication terminal 3105 according to the sixth embodiment.
- the communication terminal in FIG. 58 includes a communication section 4301, a participating terminal information receiving section 4302, a transmission rate determining section 4303, A transmission rate determination information transmitting unit 4304, a participation request transmitting unit 4305, a participation requesting unit 4306, an exclusion notification receiving unit 4307, and an exclusion determining unit 4308a.
- Figure 59 shows the implementation form.
- FIG. 59 shows another configuration of the communication terminal 3105 in state 6, in which the communication terminal in FIG. 59 includes a communication section 4301, a participation terminal information receiving section 4302, a transmission rate determination section 4303, and transmission rate determination information transmission. It has a unit 4304, a participation request transmission unit 4305, a participation request unit 4306, and an exclusion determination unit 4308a.
- FIG. 60 shows the configuration of the management terminal 1100 of the sixth embodiment.
- the management terminal of FIG. 60 includes a communication unit 4501, a participation request reception unit 4502, and a participation terminal information transmission unit. 4503, a participating terminal information updating unit 4504, a participation determination unit 4505, an exclusion notification transmitting unit 4506, a transmission rate determining information receiving unit 4507, and a transmission rate determining unit 4508.
- FIG. 61 shows the configuration of the management terminal 1100 of the sixth embodiment. The management terminal of FIG.
- 61 includes a communication unit 4501, a participation request reception unit 4502, a participation terminal information transmission unit 4503, It has a participant terminal information updating unit 4504, a participation possibility determining unit 4505, an exclusion notification transmitting unit 4506, and a transmission rate determining information receiving unit 4507.
- the network configuration management flow is controlled by the CPU, the same effect can be obtained by controlling according to the flows shown in FIGS. 36 to 44, 56, and 57.
- Embodiment 6-8 a case where a wireless network is used as a network has been described.
- the present invention is not limited to this. Even if it is applied to a network such as a high-speed PLC where communication with terminals within the network becomes impossible, multiple communication terminals with unique terminal identifiers will be used, and one of the above communication terminals will become a management terminal and will participate.
- a network configuration management method in which all of the communication terminals that are connected can directly communicate with each other, receiving the participation terminal information of the communication terminals that are participating in the network, periodically transmitted from the management terminal Participating terminal information receiving step, and communication availability determining whether communication with all communication terminals participating in the network is possible based on the participating terminal information.
- a transmitting step of transmitting the communication propriety judgment result to the management terminal a transmitting step of transmitting the communication propriety judgment result to the management terminal.
- the result of the communication propriety judgment result indicates that the communication terminal cannot perform communication with all communication terminals. The same effect can be obtained by controlling the terminal to be excluded from the network based on the exclusion notification transmitted from the network.
- a wireless network is used as a network to be managed.
- the present invention is not limited to this.
- the present invention relates to a high-speed power line in which communication between communication terminals in a network becomes impossible due to a change in communication conditions between communication terminals. It can be applied to wired networks such as communication (high-speed PLC).
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Abstract
Description
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Priority Applications (2)
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US10/587,044 US20080247332A1 (en) | 2004-02-12 | 2004-12-14 | Network Configuration Management Method, Network Band Management Method, Network Participation Method, and Communication Terminal Device |
JP2005517908A JP4717638B2 (ja) | 2004-02-12 | 2004-12-14 | ネットワークの構成管理方法及び通信端末装置 |
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JP2004034559 | 2004-02-12 | ||
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US (1) | US20080247332A1 (ja) |
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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 |
JP2011239232A (ja) * | 2010-05-11 | 2011-11-24 | Canon Inc | 送信装置、送信方法、並びにプログラム |
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US20120076211A1 (en) * | 2010-09-24 | 2012-03-29 | Texas Instruments Incorporated | Systems and Methods for Facilitating Power Line Communications |
WO2012161531A2 (ko) * | 2011-05-26 | 2012-11-29 | 엘지전자 주식회사 | 무선 통신 시스템에서 클라이언트 협력을 위한 후보 협력 장치 리스트의 유효성 확인 방법 및 장치 |
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EP1315353A1 (en) * | 2001-11-23 | 2003-05-28 | Thomson Licensing S.A. | Methods for establishing a connection between a first and a second device over a bridge connecting a HAVi-subnetwork to another sub-network |
JP3888447B2 (ja) * | 2002-04-23 | 2007-03-07 | ソニー株式会社 | 無線通信方法および無線通信装置 |
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- 2004-12-14 JP JP2005517908A patent/JP4717638B2/ja not_active Expired - Fee Related
- 2004-12-14 US US10/587,044 patent/US20080247332A1/en not_active Abandoned
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JP2011239232A (ja) * | 2010-05-11 | 2011-11-24 | Canon Inc | 送信装置、送信方法、並びにプログラム |
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JPWO2005079007A1 (ja) | 2008-01-10 |
US20080247332A1 (en) | 2008-10-09 |
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