WO2005036824A1 - Systeme de radiocommunication, client radio, et point d'acces - Google Patents

Systeme de radiocommunication, client radio, et point d'acces Download PDF

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Publication number
WO2005036824A1
WO2005036824A1 PCT/JP2003/012813 JP0312813W WO2005036824A1 WO 2005036824 A1 WO2005036824 A1 WO 2005036824A1 JP 0312813 W JP0312813 W JP 0312813W WO 2005036824 A1 WO2005036824 A1 WO 2005036824A1
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WO
WIPO (PCT)
Prior art keywords
wireless client
wired network
packet
information processing
processing device
Prior art date
Application number
PCT/JP2003/012813
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English (en)
Japanese (ja)
Inventor
Takayuki Ohta
Original Assignee
Allied Telesis Holdings K.K.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allied Telesis Holdings K.K. filed Critical Allied Telesis Holdings K.K.
Priority to PCT/JP2003/012813 priority Critical patent/WO2005036824A1/fr
Priority to AU2003271108A priority patent/AU2003271108A1/en
Priority to JP2005509448A priority patent/JPWO2005036824A1/ja
Publication of WO2005036824A1 publication Critical patent/WO2005036824A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • Wireless communication systems Wireless clients, and access points
  • the present invention relates to a wireless communication system including a plurality of wireless clients and an access point, and a wireless client and an access point configuring the wireless communication system.
  • a broadband router to connect an information processing device provided in a home or a small office to the Internet.
  • a wireless LAN is used as an internal network of a home or the like, it is common to use a broadband router having a wireless LAN access point function and provide a wireless LAN client function in each information processing device. It was a target.
  • an object of the present invention is to solve such a problem. Disclosure of the invention
  • a wireless communication system for wirelessly relaying communication between a first information processing device and an external wired network, A first wireless client connected to the wired network by wire, transmitting a packet received wirelessly to the wired network, and wirelessly transmitting a packet received from the wired network; the first information processing device A second wireless client connected to the first information processing device via a wire, supplying a packet received wirelessly to the first information processing device, and wirelessly transmitting a bucket containing data supplied from the first information processing device.
  • the first wireless client and the second wireless client The packet received from the client wirelessly without radio contention is transmitted to the first wireless client or the second wireless client, which is the destination of the bucket, at a timing when no radio contention occurs with the first wireless client and the second wireless client.
  • a wireless communication system having an access point for wirelessly transmitting.
  • the first wireless client is connected by wire to the wired network, and is connected to the wired network interface by wire, and communicates with the access point by wireless.
  • the wireless client unit stops supplying power to the wired network interface;
  • a power supply unit for starting power supply to the wired network interface when the wireless client unit receives a bucket addressed to the wired network in a state where power supply to the wireless network unit is stopped.
  • the first wireless client is connected to the wired network by wire, and communicates with the wired network by a first wired network interface; and the wired network interface is wired by wireless and communicates wirelessly with the access point.
  • the wireless client unit has a client unit and a wired connection interface that is connected to the second information processing device by wire, and the wireless client unit sets a MAC address assigned to the wired network interface as a destination MA address.
  • the packet is transmitted to the wired network by the wired network interface, and a packet having a MAC address assigned to the second information processing device as a destination MAC address is received. If , It may be transmitted to the second information processing equipment by the Baketsuto the wired connection interface.
  • the wireless client unit includes: a connection request packet having the MAC address assigned to the wired network interface as a source MAC address; and a source MAC address assigned to the second information processing device. And sending a connection request packet to the access point, A connection destination MAC address registration unit for registering a transmission source MAC address of the connection request packet as a connection destination MAC address of the access point when receiving the connection request bucket; and registering the connection destination MAC address.
  • a packet transmitting unit for sequentially transmitting, by radio, a polling packet having each of a plurality of connection destination MAC addresses registered in the unit as a destination MAC address, wherein the wireless client unit receives the polling received by radio.
  • the packet addressed to the first information processing device received from the wired network interface or the second information processing device specified by the destination MAC address of the packet is transmitted wirelessly in response to the polling bucket.
  • the data may be sequentially transmitted to the access point.
  • the access point when packet transmissions from the first wireless client and the second wireless client are competing with each other, a transfer rate of data received per unit time from the first wireless client.
  • the wireless communication device may further include an arbitration unit that arbitrates packet transmissions of the first wireless client and the second wireless client so as to be higher than a transfer rate of data received per unit time from a wireless client.
  • a wireless client for a wireless communication system that wirelessly relays communication between a first information processing apparatus and an external wired network
  • the wireless communication system includes the wired A wireless client that is connected to the network by wire, transmits packets received wirelessly to the wired network, and wirelessly transmits buckets received from the wired network, and wiredly connects to the first information processing device
  • a wireless client that wirelessly transmits a packet containing data supplied from the first information processing device by supplying a packet received by wireless to the first information processing device, ⁇ Packets received from each other wirelessly without radio contention
  • the wireless client and another wireless client that are destinations of the packet include the wireless client and an access point that wirelessly transmits the wireless client and the other wireless client at a timing that does not compete with the other wireless clients.
  • a wired network interface connected by wire to the wired network and communicating with the wired network; and a wired network interface to the wired network interface.
  • a wireless client unit that is connected to the access point and wirelessly communicates with the access point; and the wireless client unit does not receive a packet addressed to the wired network from the access point for a preset period of time.
  • the wireless client unit receives a packet addressed to the wired network in a state where power supply to the network interface is stopped and power supply to the wired network interface is stopped, connection to the wired network interface is stopped.
  • a wireless client having a power supply unit for starting power supply is provided.
  • a wireless client for a wireless communication system that wirelessly relays communication between a first information processing apparatus and an external wired network
  • the wireless communication system includes the wired A wireless client that is connected to the network by wire and transmits packets received by wireless to the wired network, and wirelessly transmits packets received from the wired network to the first information processing device by wire
  • a wireless client that transmits a packet including data supplied from the first information processing device by wirelessly supplying a bucket received by wireless to the first information processing device; ⁇
  • the buckets received from the other wireless clients wirelessly without radio contention are An access point that wirelessly transmits to the wireless client or another wireless client that is a destination of the packet at a timing that does not cause radio contention with the wireless client and the other wireless client;
  • a first wired network interface connected to the network by wire and communicating with the wired network
  • a wireless client unit connected to the wired network interface by wire and communicating with the access point wirelessly
  • second information A wired connection interface connected to the processing device by wire
  • the packet is transmitted to the wired network by the wired network interface, and when a bucket having the MAC address assigned to the second information processing device as the destination MAC address is received, the packet is transmitted.
  • a wireless client for transmitting a bucket to the second information processing device through the wired connection interface is provided. Offer.
  • an access point for a wireless communication system that wirelessly relays communication between a first information processing apparatus and an external wired network
  • the wireless communication system is A first wireless client that is connected to the network by wire, transmits packets received wirelessly to the wired network, and wirelessly transmits packets received from the wired network, and wired to the first information processing device.
  • a second wireless client that is connected and supplies a packet received wirelessly to the first information processing device, and wirelessly transmits a packet including data supplied from the first information processing device; and Packets received wirelessly from the wireless client and the second wireless client without radio contention
  • the first wireless client or the second wireless client serving as a destination of the packet, the first wireless client and the access point transmitting wirelessly at a timing that does not compete with the second wireless client for radio waves,
  • the access point determines that a transfer rate of data received per unit time from the first wireless client is:
  • an access point having an arbitration unit that arbitrates the bucket transmission of the first wireless client and the second wireless client so that the transfer rate of data received per unit time from the second wireless client is higher than that of the first wireless client.
  • FIG. 1 shows a configuration of a wireless communication system 10 according to an embodiment of the present invention.
  • FIG. 2 shows a configuration of the first wireless client 130 according to the embodiment of the present invention.
  • FIG. 3 shows a configuration of an access point 15 ° according to the embodiment of the present invention.
  • FIG. 4 shows an example of wireless communication by autonomous distributed control in the wireless communication system 10 according to the embodiment of the present invention.
  • FIG. 5 shows an example of wireless communication using the RTS ZCTS of the wireless communication system 10 according to the embodiment of the present invention.
  • FIG. 6 is a diagram illustrating the use of polling in the wireless communication system 10 according to the embodiment of the present invention. An example of a connection request process for performing wireless communication is shown.
  • FIG. 7 shows an example of wireless communication using polling in the wireless communication system 10 according to the embodiment of the present invention.
  • FIG. 8 shows an example of a hardware configuration of the information processing apparatus 120a according to the embodiment of the present invention.
  • FIG. 1 shows a configuration of a wireless communication system 10 according to the present embodiment.
  • the wireless communication system 10 connects information processing devices 110a-b and information processing devices 120a-b such as computers provided in a home or the like to an Internet connection line. Then, the wireless communication system 10 wirelessly relays communication between the information processing apparatuses 110a and 110b and the Internet connection line based on, for example, a wireless LAN standard such as IEEE802.11.
  • a wireless LAN standard such as IEEE802.11
  • an Internet connection line which is an example of an external wired network, is a line for connecting the wireless communication system 10 to the Internet, and an xDS L line connected to an Internet service provider (ISP). Or a line such as an optical fiber line.
  • ISP Internet service provider
  • the wireless communication system 10 includes a modem 100, a first wireless client 130, second wireless clients 140a-b, and an access point 150.
  • the modem 100 is connected to the Internet connection line, and performs conversion between signals on the Internet connection line and signals between the modem 100 and the first wireless client 130 according to the Ethernet (registered trademark) standard or the like.
  • Modem 100 may be, for example, an xDSL modem or the like.
  • the first wireless client 130 is installed near the place where the Internet connection line is drawn in at home or the like, and is connected to the Internet connection line via the modem 100 by wire. First, the client 130 transmits a packet addressed to the Internet connection line received wirelessly to the Internet connection line. Also, the first wireless client 130 receives the second wireless client received from the Internet connection line. A packet addressed to the access point 140a or the second wireless client 140b is transmitted to the access point 150 by radio.
  • the first wireless client 130 according to the present embodiment further includes an interface for wired connection (hereinafter, referred to as “IF_
  • the second wireless clients 140a-b are connected to the information processing devices 110a-b, which are examples of the first information processing device, by wires, respectively, and receive packets received wirelessly. 0 a to b respectively.
  • the second wireless client 140a wirelessly transmits packets including data supplied from the information processing devices 110a and 110b, respectively.
  • the second wireless clients 140a-b are realized by, for example, a PC card or the like, and are inserted into the card slots of the information processing devices 110a-b, so that May be connected.
  • the access point 150 relays wireless communication between wireless clients such as a first wireless client 130, a second wireless client 140a, and a second wireless client 140b. More specifically, access point 150 receives each packet transmitted by each wireless client by radio. Then, when a packet is received without radio contention from each wireless client, the access point 150 sends the received packet to the wireless client, which is the destination of the packet, wirelessly at a timing when there is no radio contention with each wireless client. Send.
  • wireless clients such as a first wireless client 130, a second wireless client 140a, and a second wireless client 140b. More specifically, access point 150 receives each packet transmitted by each wireless client by radio. Then, when a packet is received without radio contention from each wireless client, the access point 150 sends the received packet to the wireless client, which is the destination of the packet, wirelessly at a timing when there is no radio contention with each wireless client. Send.
  • the wireless communication system 10 includes the information processing apparatuses 110 a to b, the information processing apparatuses 120 a to b, and the Internet connection IF provided in the first wireless client 130.
  • the packet is transferred using the MAC address (Media Access Control Address) uniquely assigned to the packet. That is, each of the information processing devices 110a-b, the information processing devices 120a-b, and the Internet connection IF in the first wireless client 130 is a source MAC address in the packet header. Is the MAC address assigned to the device or IF, and the destination MAC address in the packet header is transmitted as the MAC address assigned to the destination device or IF. Then, the wireless communication system 10 transfers the packet to the device or IF specified by the destination MAC address.
  • MAC address Media Access Control Address
  • FIG. 2 shows a configuration of the first wireless client 130 according to the present embodiment.
  • the first wireless client 130 has a wired network IF 200, a switching hub unit 220, a wired connection IF 250 ab, a wireless client unit 230, and a power supply unit 240.
  • the wired network IF 200 is an Internet connection IF that is connected to the Internet connection line via the modem 100 by wire and communicates with the Internet connection line.
  • the wired network IF200 has a router function for processing the network layer of the OSI reference model, and includes an Internet connection line, the information processing devices 110a-b and the information processing devices 120a- Communication between the communication networks connecting between b may be relayed based on a network layer protocol.
  • the switcher hub unit 220 connects the wireless client unit 230 and the wired connection IF 250 ab, and performs packet exchange between them.
  • the wired connections IF 250 ab are respectively connected to the information processing devices 120 ab by wire.
  • the wireless client unit 230 is connected to the wired network IF 200 via the switching hap unit 220 by wire, and communicates with the access point 150 wirelessly.
  • the wireless client unit 230 is connected to the information processing devices 120a-b via the switching hap unit 220 and the wired connections IF 250a-b.
  • the wireless client unit 230 manages a MAC address unique to the device, which is assigned to each of the wired network IF 200, the information processing device 120a, and the information processing device 120b. It sends and receives all buckets that have any of these MAC addresses as the source or destination.
  • the line client unit 230 causes the packet to be transmitted to the Internet connection line by the wired network IF 200 via the switching hap unit 220. Further, when a packet having the MAC address assigned to the information processing device 120a or the information processing device 120b as the destination MAC address is received, the wireless client unit 230 transmits the packet to the wired connection IF 250a or the wired The information is transmitted to the information processing device 120a or the information processing device 120b via the connection IF 250b.
  • the wired network IF 200 the wired connection IF 250a, or the wired connection IF 250b
  • a bucket having the MAC address assigned to the information processing device 110a or the information processing device 110b as the destination MAC address is switched.
  • the wireless client unit 230 transmits the packet by radio, and the information processing device is transmitted by the access point 150 via the second wireless client 140a or the second wireless client 140b.
  • the data is transmitted to 110a or the information processing device 110b.
  • the power supply unit 240 manages power supply to the wired network IF 200. More specifically, the power supply unit 240 supplies power to the wired network IF 200 when the wireless client unit 230 has not received a bucket addressed to the Internet connection line from the access point 150 for a preset period. Stop. The power supply unit 240 starts power supply to the wired network IF 200 when the wireless client unit 230 receives a packet addressed to the Internet connection line in a state where power supply to the wired network IF 200 is stopped. Accordingly, the first wireless client 130 turns on the power of the wired network IF 200 only when the information processing device 110a-b or the information processing device 120a-b transmits a bucket to the Internet.
  • FIG. 3 shows a configuration of the access point 150 according to the present embodiment.
  • the access point 150 includes a packet receiving unit 300, a connection destination MAC address registration unit 310, an arbitration unit 320, and a packet transmission unit 330.
  • the bucket receiving unit 300 The first wireless client 130, the second wireless client 140a, and the second wireless client 140b receive packets transmitted by wireless.
  • the connection destination MAC address registration unit 310 stores the source MAC address of the connection request packet.
  • the MAC address of the transmission source wired network IF 200, the information processing device 110a-b, and the Z or the information processing device 120a-b designated as "" is registered as the connection destination MAC address of the access point 150.
  • the arbitration unit 320 performs arbitration via the bucket transmission unit 330 when packet transmission from the first wireless client 130, the second wireless client 140a, and Z or the packet transmission from the second wireless client 140b is in conflict.
  • the control packets used are arbitrated by transmitting them wirelessly.
  • the packet transmitting section 330 is a packet addressed to the first wireless client 130, the second wireless client 140a, and the Z or the second wireless client 140b received by the packet receiving section 300, or a control packet generated by the arbitration section 320. Is transmitted wirelessly.
  • FIG. 4 shows an example of wireless communication by autonomous distributed control in the wireless communication system 10 according to the present embodiment.
  • the access point 150, the first wireless client 130, the second wireless client 140a, and the second wireless client 140b perform access control using, for example, DCF (Distributed Coordination Function) in IEEE 802.11.
  • DCF Distributed Coordination Function
  • the wireless communication illustrated in FIG. 4 is performed.
  • the wireless client unit 230 in the first wireless client 130 sets the MAC address of the information processing device 120a as the source MAC address, A data bucket A400 having the MAC address of the processing device 110b as the destination MAC address is wirelessly transmitted.
  • the second wireless client 140a sets the MAC address of the information processing device 110a as the transmission source MAC address, and No data packet B410 with the MAC address of network IF 200 as the destination MAC address Send by line.
  • the non-client unit 230 transmits the data packet A 400 after a predetermined idle time after the radio contention of the data packet A 400 and the data bucket B 410 disappears. It is retransmitted as data packet A 420.
  • the access point 150 receives the data packet A 420 from the wireless client unit 230 by the packet receiving unit 300 without radio wave contention, and receives the data bucket A 420 by the packet transmitting unit 330. Is transmitted to the first wireless client 130 indicating that the communication has been completed.
  • the second wireless client 140 a transmits the data packet B 41 1 at a timing after receiving a packet 43 0 and after receiving a predetermined idle time and not receiving a radio wave. Resend 0 as data bucket B440.
  • the access point 150 receives the data packet B440 from the second wireless client 140a without a radio wave competition by the packet receiving unit 3000 and the data packet B440 by the packet transmitting unit 330.
  • An ACK packet 450 indicating that the reception has been completed is transmitted to the second wireless client 140b.
  • the packet transmitting unit 330 in the access point 150 transmits a data packet at a timing after a predetermined idle time has elapsed since the ACK packet 450 was transmitted and no radio wave is received.
  • the packet received as A420 is transmitted as a data bucket A460 to the second wireless client 140b, which is the destination of the packet.
  • the access point 150 If the bucket receiving unit 300 detects that the transmissions of the second wireless client 140a and / or the second wireless client 140b have a radio contention, the access point 150 The packet transmitting section 330 retransmits the data bucket A 460 at a timing after a predetermined idle time has elapsed and no radio wave is received. As a result, the packet transmission unit 330 in the access point 150 communicates with the first wireless client 130, the second wireless client 140a, and Z or the second wireless client 140b by radio waves. The data packet A 460 is transmitted over the line without a line at the timing at which no conflict occurs.
  • the second wireless client 140 b communicates from the access point 150 Data packet A460 is received without wave contention, and ACK packet 470 indicating completion of reception of data packet A460 is transmitted to access point 150.
  • FIG. 5 shows an example of radio communication using RTS / CTS of the radio communication system 10 according to the present embodiment.
  • the access point 150, the first wireless client 130, the second wireless client 140a, and the second wireless client 140b transmit radio waves between wireless clients in access control using DCF in IE EE802.11. If no conflict is detected, the wireless communication illustrated in FIG. 5 is performed.
  • the wireless client unit 230 in the first wireless client 130 upon receiving a packet for the information processing device 110a from the information processing device 120a, the wireless client unit 230 in the first wireless client 130 sends an RTS packet 500 (Request To Send: transmission) to the access point 150. Request) is transmitted wirelessly.
  • the wireless client unit 230 sets the source MAC address in the RTS packet 500 as the MAC address of the information processing device 120a, and sets the destination MAC address as the MAC address of the access point 150.
  • the packet receiving unit 300 in the access point 150 receives the RTS packet 500.
  • the arbitration unit 320 in the access point 150 transmits the RTS packet 500 to the information processing apparatus 120a designated as the source MAC address of the RTS packet 500.
  • a CTS packet 510 (Clear To Send: ready for reception) with the MAC address as the destination MAC address is transmitted wirelessly via the bucket transmitter 330.
  • the wireless client unit 230 sets the MAC address of the information processing device 120a as the source MAC address and the data packet with the MAC address of the information processing device 110a as the destination MAC address.
  • A520 is transmitted to access point 150 by radio.
  • packet transmitting section 330 in access point 150 transmits to first wireless client 130 an ACK packet 530 indicating that reception of data packet A 520 has been completed.
  • the second wireless client 140a upon receiving a packet for the wired network IF 200 from the information processing device 110a, the second wireless client 140a sends the packet to the access point 150.
  • RTS bucket 540 is transmitted wirelessly.
  • the second wireless client 140a sets the source MAC address in the RTS packet 540 as the MAC address of the information processing device 110a, and sets the destination MAC address as the MAC address of the wired network IF 200.
  • the packet receiving section 300 in the access point 150 receives the RTS packet 540.
  • the arbitration unit 320 in the access point 150 receives the RTS packet 540, and after a predetermined idle time, receives the information processing device 110a designated as the source MAC address of the RTS packet 540.
  • a CTS packet 550 having the MAC address of the destination as the destination MAC address is wirelessly transmitted via the packet transmission unit 330.
  • the second wireless client 140a Upon receiving the CTS packet 550, the second wireless client 140a sends the data packet B 560 with the MAC address of the information processing device 110a as the source MAC address and the MAC address of the wired network IF 200 as the destination MAC address. Is transmitted to the access point 150 by radio.
  • packet transmitting section 330 in access point 150 transmits ACK packet 570 indicating completion of reception of data packet B 560 to second wireless client 140a.
  • the arbitration unit 320 in the access point 150 transmits a unit time from the first wireless client 130 to the first wireless client 130 when the first wireless client 130 and the second wireless client 140 compete for packet transmission.
  • the first wireless client 130 and one second wireless client 140 are configured so that the transfer rate of data received per unit is higher than the transfer rate of data received per unit time from one second wireless client 140.
  • the RTS packet is received from both of the one second wireless client 140.
  • the arbitration unit 320 determines the number of CTS packets to be transmitted to the first wireless client 130 per unit time by the number of CTS packets to be transmitted to one second wireless client 140 per unit time. Arbitration may be done to make it larger. As a result, the access point 150 The packet transmitted by the first wireless client 130 connected to the Internet connection line can be preferentially transferred and the communication speed of the Internet connection line can be prevented from lowering.
  • the arbitration unit 320 in the access point 150 transmits the data of the bucket transmission of the bucket with the MAC address assigned to the wired network IF 200 as the source address.
  • the bucket transmission from the first wireless client 130 and the second wireless client 140 is adjusted so that the transfer rate is higher than the data transfer rate of the bucket transmission of a bucket having another MAC address as a source address. Is also good.
  • FIG. 6 shows an example of a connection request process for performing wireless communication using polling in the wireless communication system 10 according to the present embodiment.
  • the access point 150, the first wireless client 130, the second wireless client 140a, and the second wireless client 140b communicate with each other before performing access control using, for example, a PCF (Point Coordination Function) in IEEE 802.11.
  • the connection relationship is established by the wireless communication illustrated in FIG.
  • the wireless client unit 230 in the first wireless client 130 detects that the wired network IF 200, the information processing device 120a, and the information processing device 120b are connected via the switcher hub unit 220. Then, in order to register all these MAC addresses as connection destinations of the access point 150, the wireless client unit 230 sequentially sends a plurality of connection request packets each having the MAC address as a source MAC address to the access point 150. Send.
  • the wireless client unit 230 transmits to the access point 150 a connection request bucket A600 in which the MAC address assigned to the wired network IF 200 is the source MAC address.
  • the bucket transmitting unit 330 in the access point 150 transmits an ACK packet 61 ⁇ to the first wireless client 130.
  • the connection destination MAC address registration unit 310 in the access point 150 stores the transmission source MAC address of the connection request packet A600 in the connection destination MAC address of the access point 150. Register as a reply.
  • packet transmitting section 330 in access point 150 transmits to first wireless client 130 a connection response packet 620 indicating that the connection destination has been registered based on connection request bucket A 600.
  • wireless client section 230 transmits ACK packet 630 indicating that connection response packet 620 has been received, to access point 150.
  • the wireless client unit 230 sends a connection request packet B 640 having the MAC address assigned to the information processing device 120a as the source MAC address to the access point. Send to 150.
  • the access point 150 transmits the ACK bucket 650 to the first wireless client 130 in the same manner as in the case of the connection request packet A600, and transmits the source MAC address of the connection request packet B 640 to the destination MAC of the access point 150. It is registered as an address in the connection destination MAC address registration section 310, and transmits a connection response packet 660 to the first wireless client 130.
  • the wireless client unit 230 transmits an ACK packet 670 indicating that the connection response packet 660 has been received to the access point 150.
  • the first wireless client 130 and the access point 150 perform the wireless communication operation for registering the MAC address of the information processing device 120b as the connection destination MAC address in the connection destination MAC address registration unit 310 in the same manner as described above. I do.
  • the access point 150 performs access control using polling by the PCF
  • the first wireless client 130 can connect a plurality of devices or IFs to the access point 150 using the same wireless client unit 230. You can register as.
  • FIG. 7 shows an example of wireless communication using polling in the wireless communication system 10 according to the present embodiment.
  • the access point 150, the first wireless client 130, the second wireless client 140a, and the second wireless client 140b perform, for example, access control using a PCF (Point Coordination Function) in IEEE 802.11. No communication illustrated in FIG. 7;
  • PCF Point Coordination Function
  • connection request packets are transmitted wirelessly for each of the wired network IF 200, the information processing device 120a, and the information processing device 120b, and the MAC address of the device or the IF is set to the connection destination MAC.
  • the address is registered in the connection destination MAC address registration section 310 in the access point 150 as an address.
  • the second wireless clients 140a to 140b wirelessly transmit connection request packets for the information processing apparatuses 110a to 110b using the same wireless communication as in FIG. Is registered in the connection destination MAC address registration section 310 in the access point 150 as the connection destination MAC address.
  • the arbitration unit 320 in the access point 150 is registered in the connection destination MAC address registration unit 310 in order to permit each of the plurality of connection destinations registered in the connection destination MAC address registration unit 310 to sequentially transmit packets. Select each of the multiple destination MAC addresses in sequence. Then, the packet transmitting section 330 in the access point 150 sequentially transmits, by radio, a polling packet having the destination MAC address selected by the arbitration section 320 to the connected MAC address. As a result, the access point 150 arbitrates one connection destination from the wired network IF 200, the information processing device 120a, the information processing device 120b, the information processing device 110a, and the information processing device 110b. The polling packets are sequentially transmitted to the selected connection destinations by sequentially selecting them by 320.
  • the first wireless client 130, the second wireless client 140a, or the second wireless client 140b sends a request to a device specified by the destination MAC address of the polling bucket received by wireless or another wireless client received from the IF.
  • the packet is transmitted wirelessly to access point 150 in response to the polling packet.
  • the wireless client unit 230 in the first wireless client 130 receives a request from the wired network IF 200, the information processing device 120a, or the information processing device 120b specified by the destination MAC address of the polling packet received wirelessly.
  • the packet addressed to the information processing device 110a or the information processing device 110b is transmitted to the access point 150 wirelessly in response to the polling packet.
  • the arbitration unit 320 in the access point 150 has a wired network connection address among a plurality of connection destination MAC addresses registered in the connection destination MAC address registration unit 310. Select the MAC address of the network IF 200 first.
  • the packet transmitting unit 330 in the access point 150 transmits a polling packet 700 to the first wireless client 130 based on the instruction of the arbitrating unit 320.
  • the wireless client unit 230 in the first wireless client 130 transmits the data packet A 710 addressed to the information processing device 110a or the information processing device 110b wirelessly to the access point 1 Send to 50.
  • the arbitration unit 320 in the access point 150 selects the MAC address of the information processing device 120a second from among the plurality of connection destination MAC addresses registered in the connection destination MAC address registration unit 310.
  • the packet transmitting section 330 in the access point 150 transmits an acknowledgment and polling packet 720 based on the instruction of the arbitrating section 320.
  • the acknowledgment and polling packet 720 includes an ACK packet notifying that the reception of the data packet A 710 from the wired network IF 200 has been completed and a polling packet indicating that the information processing apparatus 120a has been selected.
  • the wireless client unit 230 in the first wireless client 130 transmits the data packet B 730 addressed to the information processing device 110a or the information processing device 110b wirelessly to the access point 150. Send to
  • the arbitration unit 320 in the access point 150 selects the MAC address of the information processing device 110a third from among the plurality of connection destination MAC addresses registered in the connection destination MAC address registration unit 310.
  • the packet transmission unit 330 in the access point 150 transmits an acknowledgment and polling packet 740 based on the instruction of the arbitration unit 320.
  • the acknowledgment and polling packet 740 includes an ACK packet notifying that the reception of the data packet B 730 from the information processing device 120a has been completed, and a notification that the information processing device 120a has been selected. It has a function that combines the polling packet shown.
  • the second wireless client 140a wirelessly transmits the data packet C 750 addressed to the wired network IF 200 or the information processing device 110a-b to the access point 150 in response to the acknowledgment and polling packet 740. .
  • Receiving data packet C 750, sending bucket in access point 150 The unit 330 transmits an acknowledgment and polling period end packet 760 based on the instruction of the arbitration unit 320.
  • the acknowledgment and polling period end packet 760 includes an ACK bucket for notifying that the reception of the data packet C 75 originating from the information processing device 11 Qa has been completed and the end of the access control period by the PCF.
  • a polling control period end packet that indicates In response, the first wireless client 130, the second wireless client 140a, and the second wireless client 140b detect that the PCF access control period has ended.
  • the arbitration unit 320 in the access point 150 transmits a packet per unit time from the first wireless client 130 to the first wireless client 130 when the first wireless client 130 and the second wireless client 140 are competing for bucket transmission.
  • the first wireless client 130 and the first second wireless client 140 are configured so that the transfer rate of data received by the first wireless client 130 is higher than the transfer rate of data received from the second wireless client 140 per unit time. May be arbitrated.
  • the arbitration unit 320 in the access point 150 determines the number of polling buckets to be transmitted per unit time to the first wireless client 130 in units of one second wireless client 140. Arbitration may be performed to be larger than the number of polling buckets transmitted per hour.
  • FIG. 8 illustrates an example of a hardware configuration of the information processing apparatus 120a according to the present embodiment.
  • the information processing device 120a according to the present embodiment includes a CPU 1100, a ROM 110, a RAMI 120, a communication IF 1130, a hard disk drive 1140, a flexible disk drive 1150, and a CD-ROM drive 1160. Is provided.
  • the CPU 1100 operates based on the programs stored in the ROM 110 and the RAMI 120, and controls each unit.
  • the ROM 1 110 stores a boot program executed by the CPU 1 100 when the information processing device 120 a is started, It stores a program that depends on the hardware.
  • the RAMI 120 stores programs executed by the CPU 1100, data used by the CPU 1100, and the like.
  • the communication IF 1130 communicates with another device via a communication network.
  • the information processing device 110 is connected to the communication IF 110 via a communication network.
  • the hard disk drive 1140 stores programs and data used by the information processing device 120a, and supplies the programs and data to the CPU 1100 via the RAMI 120.
  • the flexible disk drive 1150 reads a program or data from the flexible disk 1190 and provides it to the RAMI 120.
  • the CD-ROM drive 1 160 reads a program or data from the CD-ROM 1 195 and provides the program or data to the RAM 1 120.
  • the program provided to the CPU 1100 via the RAMI 120 is stored in a recording medium such as a flexible disk 1190, a CD-ROM 1195, or an IC card and provided by the user.
  • the program is read from the recording medium, installed on the first wireless client 130 or the access point 150 via the RAM 120 and the communication IF 1130, and executed on the first wireless client 130 or the access point 150. . .
  • the control program of the first wireless client 130 installed and executed on the first wireless client 130 includes a wired network IF module, a switching hap module, a wireless client module, a power supply module, and a wired IF module. And These programs or modules are executed by a control processor or the like provided on the first wireless client 130, and connect the first wireless client 130 to the wired network IF 200, the switcher hub unit 220, and the wireless client unit 230.
  • the power supply unit 240 and the wired connection IFs 250 a and 250 b are respectively operated.
  • the control program of the access point 150 installed and executed in the access point 150 includes a bucket receiving module ⁇ /, a connection destination MAC address registration module, an arbitration module, and a packet transmission module. These programs or modules include an access point 150, a packet reception unit 300, a connection destination MAC address registration unit 310, an arbitration unit 320, and a packet transmission unit. Function as 330.
  • the programs or modules described above may be stored on an external recording medium.
  • Recording media include flexible disks 119, CD-ROMs 119, optical recording media such as DVD and PD, magneto-optical recording media such as MD, tape media, and semiconductors such as IC cards.
  • a memory or the like can be used.
  • a storage device such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet is used as a recording medium, and a program is transferred from an external network to the information processing device 120a via the communication network. May be provided.

Abstract

L'invention concerne un système de radiocommunication destiné à la communication de relais radio entre un premier dispositif de traitement d'informations et un réseau câblé externe. Le système comprend: un premier client radio qui est connecté via un câble au réseau câblé, qui transmet un paquet radio reçu au niveau du réseau câblé, et qui radio transmet un paquet reçu par le réseau câblé; un second client radio qui est connecté au premier dispositif de traitement d'informations, alimente un paquet radio reçu par le premier dispositif de traitement d'informations, et radio transmet le paquet comprenant les données fournies par le premier dispositif de traitement d'informations. L'invention concerne également un point d'accès destiné à radio transmettre les paquets radio reçus par le premier client radio et le second client radio sans compétition des ondes radio, au premier client radio ou au second client radio comme destination des paquets, lorsqu'aucune compétition d'ondes radio ne se produit entre le premier et le second client radio.
PCT/JP2003/012813 2003-10-07 2003-10-07 Systeme de radiocommunication, client radio, et point d'acces WO2005036824A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2003/012813 WO2005036824A1 (fr) 2003-10-07 2003-10-07 Systeme de radiocommunication, client radio, et point d'acces
AU2003271108A AU2003271108A1 (en) 2003-10-07 2003-10-07 Radio communication system, radio client, and access point
JP2005509448A JPWO2005036824A1 (ja) 2003-10-07 2003-10-07 無線通信システム、無線クライアント、及びアクセスポイント

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/012813 WO2005036824A1 (fr) 2003-10-07 2003-10-07 Systeme de radiocommunication, client radio, et point d'acces

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WO2005036824A1 true WO2005036824A1 (fr) 2005-04-21

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AU (1) AU2003271108A1 (fr)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008227700A (ja) * 2007-03-09 2008-09-25 Oki Electric Ind Co Ltd 無線通信システム、無線通信装置及び送信権調停方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH053482A (ja) * 1991-06-26 1993-01-08 Nec Corp ポーリング・セレクテイング方式
JP2002314547A (ja) * 2001-04-11 2002-10-25 Telecommunication Advancement Organization Of Japan 中央制御装置、端末装置及びプログラム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH053482A (ja) * 1991-06-26 1993-01-08 Nec Corp ポーリング・セレクテイング方式
JP2002314547A (ja) * 2001-04-11 2002-10-25 Telecommunication Advancement Organization Of Japan 中央制御装置、端末装置及びプログラム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008227700A (ja) * 2007-03-09 2008-09-25 Oki Electric Ind Co Ltd 無線通信システム、無線通信装置及び送信権調停方法

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JPWO2005036824A1 (ja) 2006-12-28
AU2003271108A1 (en) 2005-04-27

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