Wireless VLAN construction method in wireless LAN system, VLAN packet processing program for wireless interconnecting device, recording medium on which VLAN packet processing program for wireless interconnecting device is recorded, wireless interconnecting device having VLAN function and wireless VLAN system
First Claim
1. A wireless VLAN construction method in a wireless LAN system in which a LAN backbone line wired with network devices is provided with wireless terminals enabled to exchange packets with wired side via a wireless interconnecting device, wherein in said wireless interconnecting device, a VLAN group is assigned to each of the wireless terminals belonging to the wireless interconnecting device based upon a MAC address of each of the wireless terminals, and administrative information on the wireless terminals is stored, and in the wireless interconnecting device, whether a received packet is tagged or untagged is judged, and, in a case where the packet is judged to be tagged, the packet is transmitted with a tag removed when the packet is unicast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, while the packet is transferred when the packet is broadcast, and transmitted with the tag removed when the packet is broadcast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, and, in a case where the received packet is judged to be untagged in the judgment whether the received packet is tagged or untagged, when the untagged packet is unicast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination MAC address of the packet and the packet is transferred with the VLAN identifier attached thereto, while, when the untagged packet is broadcast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination IP address of the packet and the packet is transferred with the VLAN identifier attached thereto, and thereby the wireless VLAN is realized.
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Accused Products
Abstract
A layer 3 type wireless interconnecting device 4 connected to a LAN backbone line 1 is enabled to exchange packets with wireless terminals 7a˜7g via a cable connection type wireless interconnecting device 5, non-cable connection type wireless interconnecting devices 6A and 6B, and these wireless interconnecting devices 4, 5, 6A and 6B each are configured so that, in a case where a received packet is to be transmitted to the wireless terminals 7a˜7g belonging thereto, the packet is transmitted with a tag removed when the packet is tagged, while, when the packet is to be transferred, whether or not a VLAN identifier needs to be attached thereto is judged and the packet is transferred with a VLAN identifier attached thereto when necessary, and thereby a wireless VLAN is realized.
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Citations
44 Claims
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1. A wireless VLAN construction method in a wireless LAN system in which a LAN backbone line wired with network devices is provided with wireless terminals enabled to exchange packets with wired side via a wireless interconnecting device, wherein
in said wireless interconnecting device, a VLAN group is assigned to each of the wireless terminals belonging to the wireless interconnecting device based upon a MAC address of each of the wireless terminals, and administrative information on the wireless terminals is stored, and in the wireless interconnecting device, whether a received packet is tagged or untagged is judged, and, in a case where the packet is judged to be tagged, the packet is transmitted with a tag removed when the packet is unicast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, while the packet is transferred when the packet is broadcast, and transmitted with the tag removed when the packet is broadcast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, and, in a case where the received packet is judged to be untagged in the judgment whether the received packet is tagged or untagged, when the untagged packet is unicast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination MAC address of the packet and the packet is transferred with the VLAN identifier attached thereto, while, when the untagged packet is broadcast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination IP address of the packet and the packet is transferred with the VLAN identifier attached thereto, and thereby the wireless VLAN is realized.
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8. A VLAN packet processing program for a wireless interconnecting device executed therein for constructing a wireless VLAN in a wireless LAN system in which a LAN backbone line wired with network devices is provided with wireless terminals enabled to exchange packets with wired side via said wireless interconnecting device, wherein,
the VLAN packet processing program enables said wireless interconnecting device to assign a VLAN group to each of the wireless terminals belonging to said wireless interconnecting device based upon a MAC address of each of the wireless terminals, and causes said wireless interconnecting device to store administrative information on the wireless terminals as a reference table, and causes said wireless interconnecting device to perform the following VLAN packet processing steps: -
whether a received packet is tagged or untagged is judged, and, in a case where the packet is judged to be tagged, the packet is transmitted with a tag removed when the packet is unicast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, while the packet is transferred when the packet is broadcast, and transmitted with the tag removed when the packet is broadcast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, and, in a case where the received packet is judged to be untagged in the judgment whether the received packet is tagged or untagged, when the untagged packet is unicast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination MAC address of the packet and the packet is transferred with the VLAN identifier attached thereto, while, when the untagged packet is broadcast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination IP address of the packet and the packet is transferred with the VLAN identifier attached thereto. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A recording medium on which recorded is a computer-readable VLAN packet processing program for a wireless interconnecting device to be executed therein for constructing a wireless VLAN in a wireless LAN system in which a LAN backbone line wired with network devices is provided with wireless terminals enabled to exchange packets with wired side via said wireless interconnecting device, wherein
the VLAN packet processing program enables said wireless interconnecting device to assign a VLAN group to each of the wireless terminals belonging to said wireless interconnecting device based upon a MAC address of each of the wireless terminals, and causes said wireless interconnecting device to store administrative information on the wireless terminals as a reference table, and causes said wireless interconnecting device to perform the following VLAN packet processing steps: -
whether a received packet is tagged or untagged is judged, and, in a case where the packet is judged to be tagged, the packet is transmitted with a tag removed when the packet is unicast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, while the packet is transferred when the packet is broadcast, and transmitted with the tag removed when the packet is broadcast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, and, in a case where the received packet is judged to be untagged in the judgment whether the received packet is tagged or untagged, when the untagged packet is unicast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination MAC address of the packet and the packet is transferred with the VLAN identifier attached thereto, while, when the untagged packet is broadcast, a corresponding VLAN identifier is obtained from said administrative information based upon a destination IP address of the packet and the packet is transferred with the VLAN identifier attached thereto. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A wireless interconnecting device having VLAN function in a wireless LAN system in which a LAN backbone line wired with network devices is provided with wireless terminals enabled to exchange packets with wired side via said wireless interconnecting device, wherein
said wireless interconnecting device is enabled to assign a VLAN group to each of the wireless terminals belonging thereto based on a MAC address of each of the wireless terminals and to store administrative information of the wireless terminals, and said wireless interconnecting device judges whether a received packet is tagged or untagged and, in a case where the packet is judged to be tagged, transmits the packet with a tag removed when the packet is unicast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, while transferring the packet when the packet is broadcast, and transmitting the packet with the tag removed when the packet is broadcast and needs to be transmitted to a wireless terminal belonging to the wireless interconnecting device, and, in a case where the received packet is judged to be untagged in the judgment whether the received packet is tagged or untagged, when the untagged packet is unicast, obtains a corresponding VLAN identifier from said administrative information based upon a destination MAC address of the packet and transfers the packet with the VLAN identifier attached thereto, while, when the untagged packet is broadcast, obtaining a corresponding VLAN identifier from said administrative information based upon a destination IP address of the packet and transferring the packet with the VLAN identifier attached thereto.
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36. A method for detecting a movement of a terminal in a LAN system, comprising the steps of:
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receiving, in an administrative device, device identification information of a moved terminal transmitted from a interconnecting device to which the terminal is moved, and judging that the terminal is moved when a discrepancy of information on the terminal having the device identification information is found in a database composed of information on terminals stored in advance in said administrative device together with the device identification information. - View Dependent Claims (37, 38)
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39. A program for detecting and processing a movement of a terminal to be executed in an administrative device provided in a LAN system to perform administration of the system, comprising the following steps:
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a first step to receive device identification information of a moved terminal from a interconnecting device to which the terminal is moved;
a second step to detect a discrepancy of information in a database composed of information on terminals stored in advance in said administrative device together with the device identification information; and
a third step to update said database according to a judgment that the terminal is moved when the discrepancy of the information on the terminal having the device identification information is found in said database. - View Dependent Claims (40, 41)
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42. A recording medium on which recorded is a program for detecting and processing a movement of a terminal to be executed in an administrative device provided in a LAN system to perform administration of the system, wherein
said program comprises the following steps: -
a first step to receive device identification information of a moved terminal from a interconnecting device to which the terminal is moved;
a second step to detect a discrepancy of information in a database composed of information on terminals stored in advance in said administrative device together with the device identification information; and
a third step to update said database according to a judgment that the terminal is moved when the discrepancy of the information on the terminal having the device identification information is found in said database. a fourth step, after updating said database, to transmit the updated data to the interconnecting device from which the device identification information is transmitted; and
a fifth step, when the discrepancy of the information on the terminal is detected, to instruct a interconnecting device from which the terminal is moved to delete the device identification information of the terminal and related information.
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43. An administrative device provided in a LAN system to perform administration of the system, wherein
said administrative device, receiving device identification information of a moved terminal from a interconnecting device to which the terminal is moved, judges that the terminal is moved when a discrepancy of information on a terminal having the device identification information is found in a database composed of information on terminals stored in advance in said administrative device together with the device identification information, and, after updating said database, transmits the updated data to the interconnecting device from which the device identification information is transmitted while instructing a interconnecting device from which the terminal is moved to delete the device identification information of the terminal and related information.
Specification