JP3272321B2 - Hybrid IP packet communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a host which moves over a wired section, within a wireless section, or across a wired section and a wireless section using a wireless terminal device or a LAN terminal device on an IP packet transfer network. The present invention relates to a hybrid IP packet communication system that is useful for always and accurately specifying host position information without deteriorating IP packet transfer performance of an IP packet communication system and a hybrid IP packet communication system when supported. is there.

[0002]

2. Description of the Related Art A conventional hybrid IP packet communication system has one input / output interface for accommodating a logical link, and a function for transmitting / receiving IP packets using this interface and one output interface for accommodating a logical link. A plurality of mobile terminal devices having a function of notifying an IP address of the own device using this interface, a local IP packet transfer device having a plurality of input / output interfaces accommodating logical links and transferring IP packets between these interfaces are provided. A plurality of IP packet communication devices combined in a network,
Also, one global IP packet transfer device having a plurality of communication link interfaces and transferring IP packets between these interfaces is installed, and a local IP packet transfer device and a global IP packet transfer device in each IP packet communication device are provided. Are connected by a communication link.

[0003] In such a conventional hybrid IP packet communication system, IP packet transfer processing is interrupted while the local IP packet transfer table is generated by itself, and IP packet transfer during the period when the global IP packet transfer table is generated by itself. In order to avoid interruption of the processing, one configuration management device has been added and configured as follows.

That is, an output interface that accommodates a logical link of each mobile terminal device and an input interface that accommodates a logical link of the configuration management device are connected by a logical link,
One communication link input interface is added to the local IP packet transfer device, and this is connected to the communication link output interface of the configuration management device by a communication link, and one communication input interface is added to the global IP packet transfer device. Is connected to the communication output interface of the configuration management device by a communication link, and the local IP packet transfer device has a function of receiving a local IP packet transfer table from the configuration management device and a function of transferring an IP packet using the table. In addition, a function of receiving a global IP packet transfer table from the configuration management device and a function of transferring an IP packet using the table have been added to the global IP packet transfer apparatus.

[0005] The configuration management device includes a mobile terminal device based on an IP address input from an input interface accommodating a logical link and an input interface number accommodating the logical link used for inputting the IP address. Local IP indicating the relationship between the IP address assigned to the IP address and the interface number to be used when the local IP packet transfer device transfers the IP packet to the mobile terminal device
A function of generating a packet transfer table, and an IP address assigned to the mobile terminal and a global IP packet transfer device for transferring an IP packet to a local IP packet transfer device connected to the mobile terminal device by a logical link. A function of generating a global IP packet transfer table indicating a relationship with an interface number to be used, and a function of connecting the generated local IP packet transfer table to a local IP packet transfer device connected to a mobile terminal device via a communication link. And a function of outputting the generated global IP packet transfer table from a communication link output interface that accommodates the communication link to which the global IP packet transfer device is connected.

In the conventional hybrid IP packet communication system, the local IP packet transfer table and the global IP packet transfer table are not affected by the IP packet transfer processing of the local IP packet transfer apparatus and the global IP packet transfer apparatus. Can be generated.

However, according to such a conventional apparatus, when the number of users increases due to an increase in the size of the network, the processing load on the configuration management apparatus increases in proportion to the number of users. There is a problem that the bottleneck becomes a delay in generating the local IP packet transfer table and the global IP packet transfer table and in setting the local IP packet transfer apparatus and the global IP packet transfer apparatus.

If the local IP packet transfer table for the local IP packet transfer apparatus and the global IP packet transfer table for the global IP packet transfer apparatus are not set, the wireless terminal apparatus or LAN terminal apparatus may start communication. Since it is not possible, the connection delay of a new connection or the connection delay at the time of movement between base stations increases, which is a serious problem from the viewpoint of providing services to users.

Further, when the network is widened, the distance between the configuration management device and the local IP packet transfer device and the distance between the configuration management device and the global IP packet transfer device increase. There are also problems that the network resources required for setting the forwarding table increase and the delays required for setting the IP packet forwarding table and the global IP packet forwarding table increase.

[0010] Further, even when the wireless terminal device moves (handover) between wireless base stations accommodated in the same local IP packet transfer device, processing by the configuration management device is required. When moving, there is also a problem that the processing load on the configuration management device increases.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hybrid IP packet communication system having a small processing delay even when the number of users increases due to the enlargement of the network, and a configuration management method thereof. .

[0012]

SUMMARY OF THE INVENTION The hybrid I of the present invention
In order to achieve the above object, a P-packet communication system includes a mobile terminal device, a local IP packet transfer device, a global IP packet transfer device, a local configuration management device, and a global configuration management device, and a logical link of the mobile terminal device. I / O interface accommodating the logical link of the local IP packet transfer device and the input / output interface accommodating the logical link of the local IP packet transfer device are connected by a logical link.
The communication link input / output interface of the P packet transfer device and the communication link input / output interface of the global IP packet transfer device are connected by a communication link, and the output interface accommodating the logical link of the mobile terminal device and the logical link of the local configuration management device are connected. The input interface to be accommodated is connected by a logical link, the communication link input / output interface of the local configuration management device and the communication link input / output interface of the global configuration management device are connected by a communication link, and the communication link output interface of the local configuration management device And a communication link input interface of the local IP packet transfer device by a communication link, and a communication link between the communication link output interface of the global configuration management device and the communication link input interface of the global IP packet transfer device. Characterized in that the connection using the clock.

In such a hybrid IP packet communication system of the present invention, a local management device and a global configuration management device are installed as configuration management devices.
Collection of position information of wireless terminal and LAN terminal device with heavy processing load, local IP transfer table and global IP
It is characterized in that the packet transfer table generation processing and the packet transfer table generation processing are distributed.

The local configuration management device newly installed according to the present invention includes a plurality of input interfaces for accommodating logical links, and an IP address input using the interfaces and a logical link used for inputting the IP address. Indicates the relationship between the IP address assigned to the mobile terminal device and the interface number to be used when the local IP packet transfer device transfers the IP packet to the mobile terminal device, based on the number of the input interface accommodating the packet. It has a function of generating a local IP packet transfer table and a communication link output interface, and the generated local IP packet transfer table is transmitted from the communication link output interface to which a local IP packet transfer device installed in one-to-one correspondence is connected. Output function,
A function of storing the generated local IP packet transfer table as cache information, a communication link input / output interface, and reception from the mobile terminal device only when the IP address notified from the mobile terminal device using the interface does not exist in the cache information. Generating a local IP packet transfer table from which information of the received IP address is deleted based on the function of transferring the received IP address to the global configuration management device and the IP address and the cache information received from the global configuration management device; It has a function of transmitting to the local IP packet transfer device.

Further, the global configuration management device newly installed according to the present invention includes a plurality of communication link input / output interfaces, and is connected to the IP address assigned to the mobile terminal device and the mobile terminal device by a logical link. A function of generating a global IP packet transfer table indicating a relationship with a communication link input / output interface number to be used when the global IP packet transfer apparatus transfers an IP packet to a local IP packet transfer apparatus, and a communication link output interface. A function of outputting the generated global IP packet transfer table from the interface accommodating the communication link to which the global IP packet transfer device is connected, a function of storing the generated global IP packet transfer table as cache information, and a plurality of functions. Comprises a signal link output interface, if the IP address notified from the mobile terminal device using the interface is in the cache information,
It has a function of transferring the IP address notified from the mobile terminal device to the local IP packet transfer device registered in the cache information.

The mobile terminal device in the hybrid IP packet communication system according to the present invention includes a plurality of wireless communication link interfaces, transmits and receives IP packets using the wireless communication link interface, and uses the other wireless communication link interfaces to transmit and receive IP packets. A plurality of wireless terminal devices having a function of notifying an IP address of the device to a wireless base station;
A wire communication link interface and a wireless communication link interface, a function of transferring an IP packet between these interfaces, and reading of an IP address given to a wireless terminal device connected to the wireless communication link interface Including wireless base stations with functions,
These wireless communication link interfaces can be connected to each other by a wireless communication link.

Further, the mobile terminal device in the hybrid IP packet communication system of the present invention has a LAN interface, and a plurality of LAN terminal devices having a function of transmitting and receiving IP packets using this interface.
A LAN having a communication link interface and a LAN interface, a function of transferring an IP packet between these interfaces, and a function of reading an IP address given to a LAN terminal device connected to the LAN interface; A terminal accommodating device is included, and these communication link interfaces can be connected to each other by a communication link.

According to the present invention, by configuring as described above, the configuration management device can be functionally separated into a global configuration management device and a local configuration management device. Can be physically distributed and installed in a one-to-one correspondence with the local IP packet transfer device. Furthermore, the processing load on the global configuration management device or each local configuration management device can be limited. This can be dealt with by increasing the number of configuration management devices installed. Furthermore, by installing a global configuration management device in the global IP packet transfer device and a local configuration management device in one-to-one correspondence with each local IP packet transfer device, the distance between the transfer node and the configuration management device is reduced. This makes it possible to effectively utilize network resources and reduce connection delay. Further, the movement of the wireless terminal between the wireless base stations accommodated in the same local IP packet transfer apparatus can be handled by the local configuration management apparatus, thereby reducing the processing load on the global configuration management apparatus and reducing the global configuration. Concentration of the processing load on the management device can be avoided.

[0019]

Next, embodiments of the present invention will be described. FIG. 1 is a diagram showing a configuration example in a case where position information management of a wireless terminal device and a LAN terminal device is performed in a hybrid IP packet communication system according to the present invention.

In FIG. 1, 1 is a wireless terminal device, 2 is a wireless base station, 3 is a LAN terminal device, 4 is a LAN terminal accommodation device, 5 is a portable card, 6 is a local IP packet transfer device, and 7 is a global IP packet. Transfer device. 8 is a local configuration management device, and 9 is a global configuration management device.

The wireless terminal device 1 is connected to the wireless base station 2 via a wireless interface, and transmits and receives IP packets and authentication frames via a wireless link. The IP address is notified to the wireless base station 2 by setting an IP address other than the authentication ID in the authentication request frame.

The wireless base station 2 transmits and receives IP packets to and from the local IP packet transfer device 6 via the data transfer link. Further, it receives an authentication request in which an authentication ID and an IP address are set from the wireless terminal device 1, and performs authentication using the authentication ID. Before the authentication is completed and when the authentication is NG, the IP packet is not transmitted and received, and the IP packet other than the IP address set in the authentication request is set as the source IP address from the mobile user host. If received, the IP packet is discarded. After the authentication, the IP address set in the authentication request by the control link is changed to the local configuration management device 8.
Send to

The LAN terminal device 3 is connected to the LAN terminal accommodating device 4 by an Ethernet interface,
Sends and receives packets.

The LAN terminal accommodating device 4 transmits and receives IP packets to and from the local IP packet transfer device 6 via the data transfer link. In addition, a portable card slot is provided, and an authentication ID and an IP
The address is read, and the LAN terminal device is authenticated by the authentication ID. Before the authentication is completed and when the authentication is NG, the IP packet is not transmitted or received, and the IP packet other than the IP address read from the portable card is set as the source IP address in the LAN terminal device 3.
, The IP packet is discarded. After the authentication is completed, the IP address read from the mobile card 5 is transmitted to the local configuration management device 8 through the control link.

The local IP packet transfer device 6 transmits and receives IP packets to and from the wireless base station 2, the LAN terminal accommodating device 4, and the global IP packet transfer device 7. Further, the local IP packet transfer table is received from the local configuration management device 8 installed in one-to-one correspondence with each local IP packet transfer device 6 through a control link. The transfer processing of the IP packet is performed by the local I
This is performed according to the P packet transfer table.

The global IP packet transfer device 7 performs an IP packet transfer process between the local IP packet transfer devices 6. Further, it receives a global IP packet transfer table from the global configuration management device 9 via a control link. The IP packet transfer process is performed using this global IP packet transfer table.

[0027] The local configuration management device 8
Alternatively, it generates a local IP packet transfer table based on the IP address information received from the LAN terminal accommodating apparatus 4 through the control link and the local position information resolution table held by the apparatus itself, and transmits the table to the local IP packet transfer apparatus 6. Further, the generated local IP packet transfer table is held as cache information, and when an IP address that does not exist in the cache information is received from the wireless base station 2 or the LAN terminal accommodation device 4, the IP address is stored in the global configuration management device 9. Forward. When an IP address is received from the global configuration management device 9, a local IP packet transfer table is generated by deleting the received IP address information from the cache information, and this table is transmitted to the local IP packet transfer device 6. .
It should be noted that the local configuration management device 8 is installed in a one-to-one correspondence with the local IP packet transfer device 6.

The global configuration management device 9 stores the IP address information received from the radio base station 2 or the LAN terminal accommodating device 4 via the local configuration management device 8 through the control link and the global position information resolution table held by itself. On the basis thereof, a global IP packet transfer table is generated and transmitted to the global IP packet transfer device 7. Also, a correspondence table between the IP address and the accommodated local IP packet transfer device 6 is held, and when the mobile terminal device moves between the local IP packet transfer devices, the local IP packet transfer device described in the correspondence table is stored. To the IP address.

FIG. 2 shows an example of the local location information resolution table.
Shown in The local location information resolution table is fixedly set in the local configuration management device 8, and is stored in the radio base station 2 or the LA.
From the input interface number of the control link connected to the N terminal accommodation device 4, the interface number of the local IP packet transfer device 6 in which the wireless terminal device 1 or the LAN terminal device 3 is accommodated is resolved.

FIG. 3 shows an example of the global position information resolution table. The global location information resolution table is fixedly set in the global configuration management device 9 and, based on the input interface number of the control link connected to the local configuration management device 8, the wireless terminal device 1 in the global IP packet transfer device 7 or The number of the interface with the local IP packet transfer device 6 accommodating the LAN terminal device 3 is resolved.

FIG. 4 shows an example of the local IP packet transfer table. The local IP packet transfer table includes an IP address in the local configuration management device 8 and an interface number of the local IP packet transfer device 6 in which the wireless terminal device 1 or the LAN terminal device 3 is accommodated. The local IP packet forwarding table is transmitted from the local configuration management device 8 to the local IP packet forwarding device 6 via the control link, and the received IP packet forwarding device 6 is used as it is for the IP packet forwarding process.

FIG. 5 shows an example of the global IP packet transfer table. The global IP packet transfer table is composed of the IP address and the interface number of the global IP packet transfer device 7 with the local IP packet transfer device 6 accommodating the wireless terminal device 1 or the LAN terminal device 3 in the global configuration management device 9. You. The global IP packet forwarding table is stored in the global configuration management device 9 by the control link 14.
Is transmitted to the global IP packet transfer device 7 and is used by the received global IP packet transfer device 7 for IP packet transfer processing.

Next, the wireless terminal device 1 and the LAN in the hybrid IP packet communication system shown in FIG.
The position information management procedure of the terminal device 3 will be described. First, the wireless base station 2 receives the authentication request from the wireless terminal device 1
The terminal accommodating device 4 uses the authentication I
Read D and IP address. Wireless base station 2 or LAN
The terminal accommodation device 4 performs authentication using the authentication ID. Next, the wireless base station 2 or the LAN terminal accommodation device 4 transmits the IP address to the local configuration management device 8 through the control link.

The local configuration management device 8 receives the received IP
The location information of the terminal device is resolved by the local location information resolution table from the address and the number of the receiving interface, a local IP packet forwarding table is generated from the IP address and the location information, and transmitted to the local IP packet forwarding device 6. The local IP packet transfer device 6
Using the received local IP packet transfer table as it is, IP packet transfer processing to the wireless base station and the LAN terminal accommodation device is performed. In addition, the local configuration management device 8 checks whether or not the IP address received from the wireless base station 2 or the LAN terminal accommodation device 4 exists in the cache information. The local IP that was transferred and generated
Update cache information based on the packet transfer table.

The global configuration management device 9 receives the I
The location information of the terminal device is resolved by the global location information resolution table from the P address and the number of the receiving interface, a global IP packet forwarding table is generated from the IP address and the location information, and transmitted to the global IP packet forwarding device 7. The global IP packet transfer device 7 performs a process of transferring the IP packet to the wireless base station and the LAN terminal accommodation device using the received global IP packet transfer table as it is. Further, the global configuration management device 9 uses the IP address and the correspondence table of the accommodated local IP packet transfer device 6 to
When recognizing the movement between the wireless terminal device 1 and the local IP packet transfer device of the LAN terminal device 3, the IP address is transmitted to the local IP packet transfer device 6 registered in the correspondence table.

[0036]

As described above, according to the present invention,
A local configuration management device that performs a process of collecting location information of a wireless terminal device or a LAN terminal device having a heavy processing load and a process of generating a local IP packet transfer table and a global IP packet transfer table in a one-to-one manner in the local IP packet transfer device; By performing the distributed processing in the global configuration management device, the local configuration management device can concentrate on generating the local IP packet transfer table of the local IP packet transfer device corresponding to the one-to-one correspondence. This allows the transfer device to concentrate on generating a global IP packet transfer table. Further, since the local configuration management device and the local IP packet transfer device correspond to each other, and the global configuration management device and the global IP packet transfer device correspond one-to-one, the distance of the control link can be shortened. It is possible to reduce the delay of table setting. Further, when the wireless terminal device moves between wireless base stations accommodated in the same local IP packet transfer device, the local configuration management device generates a local IP packet transfer table, thereby eliminating the need for processing to the global configuration management device. It becomes possible to do.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a configuration of a hybrid IP packet communication system of the present invention.

FIG. 2 is a diagram illustrating an example of a local location information solution table.

FIG. 3 is a diagram illustrating an example of a global location information solution table.

FIG. 4 is a diagram showing an example of a local IP packet transfer table.

FIG. 5 is a diagram showing an example of a global IP packet transfer table.

[Explanation of symbols]

 Reference Signs List 1 wireless terminal device 2 wireless base station 3 LAN terminal device 4 LAN terminal accommodating device 5 portable card 6 local IP packet transfer device 7 global IP packet transfer device 8 local configuration management device 9 global configuration management device

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Hara 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (56) References JP 2000-59432 (JP, A) 1999 IEICE General Conference B-7-168, March 8, 1999 IEICE Communications Society Conference B-7-52, September 7, 1998 (58) Fields surveyed (Int.Cl . ^7, DB name) H04L 12/56 H04L 12/46 H04L 12/66 H04L 12/28

Claims (5)

(57) [Claims] 1. A hybrid IP packet communication system for transferring packets between mobile terminals, comprising: an input / output interface for accommodating a logical link; a function of transmitting / receiving an IP packet using the interface; A mobile terminal device having a function of notifying its own IP address using the interface, an input / output interface accommodating a plurality of logical links, and a communication link input / output interface. A local IP packet transfer device having a function of transferring an IP packet between mobile terminal devices or between a mobile terminal device and a global IP packet transfer device using a plurality of communication link input / output interfaces; Local IP packet Global IP with function to transfer IP packets between transfer devices
A packet transfer device having a plurality of input interfaces for accommodating logical links, and moving based on an IP address input using the interfaces and an input interface number for accommodating the logical links used for inputting the IP addresses; A function of generating a local IP packet transfer table indicating a relationship between an IP address assigned to a terminal device and an interface number to be used when the local IP packet transfer device transfers an IP packet to the mobile terminal device, communication link output A function of outputting the generated local IP packet transfer table from the communication link output interface connected to the local IP packet transfer device installed in one-to-one correspondence, and caching the generated local IP packet transfer table Keep as information Function, communication link input / output interface,
A function of transferring the IP address received from the mobile terminal device to the global configuration management device only when the IP address notified from the mobile terminal device using the interface does not exist in the cache information, and an IP address received from the global configuration management device. Local I that deletes the received IP address information based on the address and the cache information
A local configuration management device having a function of generating a P packet transfer table and transmitting it to a local IP packet transfer device; and a plurality of communication link input / output interfaces, an IP address assigned to the mobile terminal device and the mobile terminal device The global IP packet transfer device to the local IP packet transfer device connected to the
A function of generating a global IP packet transfer table indicating a relationship with a communication link input / output interface number to be used when transferring a P packet, and a communication link output interface, and transferring the generated global IP packet transfer table to a global IP packet A function of outputting from the interface accommodating the communication link to which the device is connected, a function of storing the generated global IP packet transfer table as cache information, and a plurality of communication link input / output interfaces. If the IP address notified from the mobile terminal exists in the cache information, a function is provided for transferring the IP address notified from the mobile terminal to the local IP packet transfer device registered in the cache information. Comprising a Baru configuration management system, and input and output interface to accommodate the input and output interface and a logical link local IP packet transfer apparatus accommodating a logical link of the mobile terminal connected by logical links,
The communication link input / output interface of the local IP packet transfer device and the communication link input / output interface of the global IP packet transfer device are connected by a communication link, and an output interface accommodating a logical link of the mobile terminal device and a logical link of the local configuration management device And a communication link input / output interface of the local configuration management device and a communication link input / output interface of the global configuration management device are connected by a communication link, and a communication link output of the local configuration management device is connected. The interface and the communication link input interface of the local IP packet transfer device are connected by a communication link, and the communication link output interface of the global configuration management device and the communication link input interface of the global IP packet transfer device Hybrid IP packet communication system, wherein a connected communication links. 2. A local configuration management device for a hybrid IP packet communication system according to claim 1, wherein said local configuration management device accommodates an IP address input from an input interface accommodating a communication link and a logical link used for inputting said IP address. Local IP indicating the relationship between the IP address assigned to the mobile terminal device and the interface number to be used when the local IP packet transfer device transfers the IP packet to the mobile terminal device based on the input interface number to be transferred. A packet transfer table is generated, and the generated local IP packet transfer table is output from a communication link output interface to which a local IP packet transfer device installed in one-to-one correspondence is connected, and the generated local IP packet transfer table is generated. Is stored as cache information, Only when the IP address notified from the mobile terminal does not exist in the cache information, the IP address received from the input interface accommodating the logical link from the mobile terminal is transferred to the global configuration management device using the communication link input / output interface. And generating a local IP packet transfer table in which information of the received IP address is deleted based on the IP address and the cache information received from the global configuration management device;
A configuration management method for an IP packet communication system, wherein the configuration is transmitted to a local IP packet transfer device. 3. The global configuration management apparatus for a hybrid IP packet communication system according to claim 1, wherein the global configuration management apparatus comprises: an IP address assigned to the mobile terminal;
Global IP packet transfer table indicating the relationship between the input and output interface numbers of communication links to be used when the P packet transfer device transfers an IP packet to a local IP packet transfer device connected to the mobile terminal device by a logical link And outputs the generated global IP packet transfer table from a communication link output interface that accommodates the communication link to which the global IP packet transfer device is connected, and stores the generated global IP packet transfer table as cache information; If the IP address notified from the mobile terminal device is present in the cache information, the IP address notified from the mobile terminal device using the communication link input / output interface is sent to the local IP packet transfer device registered in the cache information. Address IP packet communication system configuration management method characterized by transferring. 4. The hybrid IP packet communication system according to claim 1, wherein the mobile terminal device has a plurality of wireless communication link interfaces, transmits and receives IP packets using the wireless communication link interface, and performs other wireless communication. A plurality of wireless terminal devices having a function of notifying an IP address of the own device to a wireless base station using a communication link interface, and a wired communication link interface and a wireless communication link interface, and an IP packet between these interfaces The ability to transfer
And a wireless base station having a function of reading an IP address assigned to a wireless terminal device connected to the wireless communication link interface, wherein the wireless communication link interfaces are connected by a wireless communication link. Hybrid IP packet communication system. 5. The hybrid IP packet communication system according to claim 1, wherein said mobile terminal device has a LAN interface, and has a function of transmitting and receiving IP packets using said interface.
AN terminal device, communication link interface and LAN
And a LAN terminal accommodating device having a function of transferring an IP packet between these interfaces, and a function of reading an IP address given to a LAN terminal device connected to the LAN interface. A hybrid IP packet communication system, wherein the communication link interfaces are connected by a communication link.