JP2016220063A - Communication device, packet transfer method, and packet transfer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication device that creates data for high-speed transfer and performs packet transfer processing, and can reliably transmit packets through all of multiple ports in use when performing flooding during communication by multicast or broadcast.SOLUTION: A communication device obtains data for high-speed transfer including the same transmission source identification information and destination identification information as transmission source identification information and destination identification information included in a reception packet. If the number of pieces of necessary data included in the obtained data for high-speed transfer does not accord with the obtained number of pieces of data for high-speed transfer, the communication device does not perform transfer processing using the obtained data for high-speed transfer, but performs normal transfer processing, and creates lacking data for high-speed transfer again, and stores it in high-speed transfer data storage unit 120.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication device, a packet transfer method, and a packet transfer program, and more particularly to a communication device, a packet transfer method, and a packet transfer program that create high-speed transfer data to increase the transfer processing speed of the same type of packet.

  When transferring a packet, a communication device such as a router searches and references various tables and databases in the communication device based on the control information attached to the packet for each packet. Determine how to handle packets. Such processing includes processing such as adding or modifying control information to the packet based on the search result, or transmitting from a specific communication port.

  Further, at the time of communication by multicast or broadcast, a process called flooding is performed in which the received packet is copied from all communication ports other than the communication port that received the packet and the packet subjected to the above-described various processes is transmitted.

  In a communication apparatus that performs the above-described processing, high-speed transfer data including a processing method in normal transfer processing and additional correction data is created and stored, and the same type of packet is complicated as described above. A technique for increasing the packet transfer processing speed by applying the contents of the data for high-speed transfer without repeatedly performing such processing is known.

  For example, in Patent Document 1, processing contents for a packet including certain control information (source address, destination address, etc.) are stored in a cache block in advance in packet forwarding processing in a router, and control of received packets is performed. When the information is the same as the control information, a technique is described for applying the processing content to increase the processing speed compared to the normal processing that is performed by judging the processing content every time it is received. Yes.

  As a related technique, Patent Document 2 discloses a single virtual LAN between a source host connected to a first token ring LAN and a target host connected to a second token ring LAN (ie, (LAN interconnected via a router) is dynamically configured, and the routing information connecting the source host and the target host is stored in the routing information field included in the token ring frame, A technique for speeding up transfer processing of the frame from the transmission source host to the target host is described.

JP 2011-077955 A JP 2000-078173 A

  However, as described above, in a communication apparatus that increases the transfer processing speed by creating data for high-speed transfer and applying it to the same type of packet, when performing flooding during multicast or broadcast communication, there is a problem for some reason. When transmission from a certain communication port fails, high-speed transfer data to be applied to a packet transmitted from the communication port is not created. Therefore, there is a problem that transmission from other communication ports is performed during subsequent multicast or broadcast communication, but transmission from some of the communication ports is not performed.

  In Patent Documents 1 and 2, in a communication device that creates and processes data for high-speed transfer, when performing flooding during multicast or broadcast communication, it is ensured that all of a plurality of used ports are used. There is no description of any technique for transmitting packets.

  An object of the present invention is to provide a communication device, a packet transfer method, and a packet transfer program that can solve the above-described problems.

The communication device of the present invention
Receiving means for receiving a reception packet including transmission source identification information for identifying a transmission source device, destination identification information for identifying a destination device, transfer control information, and transfer data;
At least one transmission means provided in a one-to-one correspondence with at least one of the destination devices, and transmitting a packet to each of the destination devices;
Contents of addition and correction performed based on predetermined rules for the transmission source identification information, the destination identification information, the transmission means identification information for identifying the transmission means, and the transfer control information included in the received packet. High-speed transfer data storage means for storing high-speed transfer data including additional correction data shown;
The high-speed transfer data is acquired from the high-speed transfer data storage unit based on the transmission source identification information and the destination identification information included in the received packet, and the number of the acquired high-speed transfer data and the transmission unit When the received packet and the acquired high-speed transfer data are sent to the high-speed transfer means, on the other hand, the acquired number of high-speed transfer data and the number of the transmission means are different Is a high-speed transfer determination means for sending the received packet to the normal transfer means;
The received packets are duplicated so as to have the same number as the high-speed transfer data, and each duplicated packet is processed based on the content of the additional correction data included in each high-speed transfer data. High-speed transfer means for transmitting the transmitted packet from the transmission means indicated by the transmission means identification information included in each of the high-speed transfer data;
The received packets are duplicated so as to have the same number as the transmitting means, and the transfer control information included in each duplicated packet is added and modified based on a predetermined rule, and each duplicated packet is transmitted from each transmitting means. And normal transfer means for storing the high-speed transfer data in the high-speed transfer data storage means when the transmission from the transmission means is successful.

Further, the packet transfer method of the present invention includes:
Transmission source identification information for identifying a transmission source device, destination identification information for identifying a destination device, and transmission unit identification information for identifying a transmission unit that is provided in a one-to-one correspondence with the destination device and that transmits a packet to each destination device And high-speed transfer data storage means for storing high-speed transfer data including addition correction data indicating the contents of addition and correction performed on the transfer control information included in the received packet based on a predetermined rule In
Receiving a reception packet including the transmission source identification information, the destination identification information, the transfer control information, and transfer data;
Obtaining the high-speed transfer data from the high-speed transfer data storage means based on the transmission source identification information and the destination identification information included in the received packet;
When the acquired number of high-speed transfer data and the number of the transmission means are the same, the received packets are duplicated so as to be the same number as the high-speed transfer data, and each of the duplicated packets is transferred to the high-speed transfer. Processing based on the content of the additional correction data included in the data for transmission, and transmitting each processed packet from the transmission means indicated by the transmission means identification information included in each of the high-speed transfer data,
On the other hand, when the acquired number of the high-speed transfer data and the number of the transmission means are different, the received packet is duplicated so as to be the same number as the transmission means, and the duplicated packet included in each duplicated packet The transfer control information is added and corrected based on a predetermined rule, and each of the duplicated packets is transmitted from each of the transmission units, and when the transmission from the transmission unit is successful, the high-speed transfer data is It is stored in data storage means for high-speed transfer.

The packet transfer program of the present invention is
Transmission source identification information for identifying a transmission source device, destination identification information for identifying a destination device, and transmission unit identification information for identifying a transmission unit that is provided in a one-to-one correspondence with the destination device and that transmits a packet to each destination device A first storage process for storing data for high-speed transfer, including additional correction data indicating the contents of addition and correction performed based on a predetermined rule with respect to transfer control information included in the received packet;
A reception process for receiving a reception packet including the transmission source identification information, the destination identification information, the transfer control information, and transfer data;
An acquisition process for acquiring the high-speed transfer data based on the transmission source identification information and the destination identification information included in the received packet;
When the number of high-speed transfer data acquired in the acquisition process is the same as the number of destination devices, the received packet is duplicated so as to be the same number as the high-speed transfer data. A process is performed based on the content of the additional correction data included in the high-speed transfer data, and each processed packet is transmitted from the transmission means indicated by the transmission means identification information included in each of the high-speed transfer data. Sending process,
On the other hand, if the acquired number of the high-speed transfer data and the number of destination devices are different, the received packet is duplicated to be the same number as the number of destination devices, and is included in each duplicated packet. Adding and modifying the transfer control information based on a predetermined rule, and transmitting each of the duplicated packets from each of the transmission means,
When the second transmission process is successful, the computer executes a second storage process for storing the high-speed transfer data.

  According to the present invention, in a communication device that creates data for high-speed transfer and performs packet transfer processing, when performing flooding during multicast or broadcast communication, the packet is surely received from all of a plurality of ports that are used. Can be transmitted.

It is a block diagram which shows the 1st Embodiment of this invention. It is a figure which shows an example of the data for high-speed transfer in 1st Embodiment. It is a flowchart which shows operation | movement of the communication apparatus 100 in 1st Embodiment. It is a block diagram which shows the 2nd Embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram showing a first embodiment of the present invention.

  Referring to FIG. 1, this embodiment includes a communication device (also referred to as a “computer”) 100, a node 170 connected to the communication device 100, a node 171 connected to the communication device 100 via a network 160, and 172.

  The communication device 100 includes a high-speed transfer determination unit 110, a high-speed transfer data storage unit 120 that stores high-speed transfer data described later, a normal transfer unit 130, a high-speed transfer unit 140 including a high-speed transfer control unit 141, a node 170, an input interface unit 150 that receives a packet transmitted from the node 170, an output interface unit 151 that is connected to the node 171 via the network 160 and transmits a packet to the node 171, and a node 172 via the network 160. And an output interface unit 152 that transmits packets to the node 172.

  Each output interface unit is assigned unique identification information for identifying each.

  The nodes 170, 171, and 172 are other communication devices or information processing devices, and each is assigned unique identification information for identifying each. The packet transmitted by each node includes identification information indicating the node as transmission source identification information, and identification information indicating a transmission destination node of the packet as destination identification information. When each node performs multicast or broadcast communication, destination identification information included in a packet transmitted by the node includes specific identification information (predetermined identification information used for multicast and broadcast communication). In this embodiment, “DEST999” and “DEST000” are set.

  The network 160 may be a public communication line such as the Internet, or a private network such as a LAN (Local Area Network).

  The normal transfer unit 130 includes a normal transfer control unit 131, a high-speed transfer data creation unit 132, and normal transfer processing units 133 and 134 provided in a one-to-one correspondence with the output interface units 151 and 152, respectively.

  The normal transfer control unit 131 determines a destination node based on destination identification information included in a packet received from the input interface unit 150 via the high-speed transfer determination unit 110, and an output interface unit connected to the node The packet is sent to the normal transfer processing unit corresponding to. If the destination identification information is predetermined specific identification information used for multicast and broadcast communications, the normal transfer control unit 131 duplicates the received packet to perform all normal transfer processing. Send to department.

  The normal transfer processing units 133 and 134 modify the packet received from the normal transfer control unit 131 based on a predetermined rule, or perform a predetermined process determined based on control information included in the packet and create a new After the control information is added, the packets are sent to the corresponding output interface units 151 and 152, respectively. At this time, additional correction data which is a value indicating control information added to the packet or a value indicating correction content, identification information indicating an output interface unit which has sent the processed packet, and the like are used for high-speed transfer. The data is sent to the data creation unit 132.

  The high-speed transfer data creation unit 132 stores the information received from the normal transfer processing units 133 and 134 in the high-speed transfer data storage unit 120 as high-speed transfer data.

  The high-speed transfer determination unit 110 acquires high-speed transfer data from the high-speed transfer data storage unit 120 based on the transmission source identification information and the destination identification information included in the packet received from the input interface unit 150. Then, the packet is sent to the normal transfer control unit 131 or the high-speed transfer control unit 141 according to the acquired result.

  The high-speed transfer control unit 141 receives the packet and at least one high-speed transfer data from the high-speed transfer determination unit 110, and duplicates the packet so as to have the same number as the number of high-speed transfer data. Then, the high-speed transfer control unit 141 processes each copied packet based on the content of the additional correction data included in each of the high-speed transfer data, and identifies the output interface identification included in each of the high-speed transfer data Send the information to the assigned output interface.

  The high-speed transfer data storage unit 120 stores the high-speed transfer data created by the high-speed transfer data creation unit 132.

  FIG. 2 is a diagram illustrating an example of high-speed transfer data stored in the high-speed transfer data storage unit 120.

  Referring to FIG. 2, the high-speed transfer data includes a transmission source identification, a destination identification, an output interface identification, a necessary number of data, and additional correction data.

  Here, the transmission source identification is identification information indicating transmission source identification information included in the packet received by the input interface unit 150, and the destination identification is identification information indicating destination identification information included in the received packet. The output interface identification is identification information indicating an output interface unit corresponding to the transmission destination node of the packet after processing the received packet.

  The required number of data is connected to a node among at least one output interface unit existing in the communication device 100 when the destination identification is predetermined specific identification information used for multicast or broadcast communication. It is a value indicating the number of items that have been set, and is “1” when the destination identification is other identification information. That is, the required data number is either a value indicating the number of output interface units connected to the node or “1”.

  The additional correction data is a value indicating the control information added to the received packet by the normal transfer processing unit 133 or a value indicating the corrected content. For example, when an L2TP (Layer2 Tunneling Protocol) header for encapsulation processing for providing data communication by providing a virtual communication path on a public line such as the Internet is added, a value indicating the L2TP header is included. A value indicating an added IP (Internet Protocol) header is included.

  In addition, when the destination identification is specific identification information determined in advance for use in multicast and broadcast communication, the identification information of the transmission source identification and the identification information of the destination identification are the same and output. A plurality of high-speed transfer data having different identification information for interface identification is stored in the high-speed transfer data storage unit 120.

  Referring to the example of the high-speed transfer data in the second row of FIG. 2, the identification information of the transmission source node indicated by the transmission source identification is “SRC170”, and the identification information of the transmission destination node indicated by the destination identification is communication by multicast. The identification information of the output interface unit that sends the processed packet indicated by the output interface identification is “PORT151”. Since the destination identification “DEST999” is identification information used for multicast communication, the required number of data is the output interface unit connected to the node among the output interface units (ie, the output interface units 151 and 152). It is “2” indicating the number of. The additional correction data is “L2TP header 1” indicating the L2TP header and “IP header 1” indicating the IP header.

  Next, the operation of the communication apparatus 100 will be described with reference to FIG. FIG. 3 is a flowchart showing the operation of the communication apparatus 100.

  Referring to FIG. 3, first, when the node 170 transmits a packet addressed to the node 171 or 172, or a packet for performing multicast or broadcast communication, the input interface unit 150 receives the packet and receives the high-speed transfer determination unit 110. Send to.

  The high-speed transfer determination unit 110 searches the high-speed transfer data stored in the high-speed transfer data storage unit 120 based on the transmission source identification information and the destination identification information included in the received packet received from the input interface unit 150, The high-speed transfer data in which the transmission source identification information and the destination identification information are the same as the identification information indicated by the transmission source identification and the identification information indicated by the destination identification included in the high-speed transfer data is acquired (step S100). .

  When the received packet is a packet for multicast or broadcast communication, the destination identification information included in the packet is predetermined specific identification information, and the destination indicated by the same identification information as the identification information There is one or more high-speed transfer data including identification, but all of them are acquired.

  When the high-speed transfer data can be acquired in step S100 (in the case of “YES” in step S101), the high-speed transfer determination unit 110 uses the acquired number of high-speed transfer data and the acquired high-speed transfer data. It is determined whether or not the value indicated by the number of necessary data included is the same value (step S102). When there are a plurality of acquired high-speed transfer data, the values indicated by the number of necessary data included in each of the high-speed transfer data are all the same value, and therefore must be included in one of the high-speed transfer data. What is necessary is just to compare with the value which the number of data shows.

  In step S102, when the number of acquired high-speed transfer data and the value indicated by the number of necessary data included in the high-speed transfer data are the same value (in the case of “YES” in step 102), the high-speed transfer determination The unit 110 sends the received packet and the acquired at least one high-speed transfer data to the high-speed transfer control unit 141.

  The high-speed transfer control unit 141 copies the packets received from the high-speed transfer determination unit 110 so as to have the same number as the received high-speed transfer data (step S103).

  Then, the high-speed transfer control unit 141 associates each duplicated packet with each of the high-speed transfer data on a one-to-one basis, and based on the content of the additional correction data included in each of the corresponding high-speed transfer data Perform processing (for example, perform processing such as adding an IP header and an L2TP header).

  The high-speed transfer control unit 141 sends the processed packet to the output interface unit to which the identification information indicated by the output interface identification included in each of the high-speed transfer data is assigned, and each of the output interface units performs the high-speed transfer control. The processed packet received from the unit 141 is transmitted to the connected node (step S104).

  On the other hand, if high-speed transfer data could not be acquired in step S100 (if “NO” in step S101), or the number of high-speed transfer data acquired in step S101 and the necessary data included in the high-speed transfer data If the value indicated by the number is not the same value (“NO” in step 102), the high-speed transfer determination unit 110 sends the received packet to the normal transfer control unit 131.

  The normal transfer control unit 131 receives the destination identification information included in the received packet received from the high-speed transfer determination unit 110 if the destination identification information is predetermined specific identification information used for multicast or broadcast communication. The packet is copied and sent to all normal transfer processing units, that is, normal transfer processing units 133 and 134. In addition, when the destination identification information is identification information other than the specific identification information, a node to which the destination identification information is assigned is determined, and the normal corresponding to the output interface unit connected to the node The packet is sent to the transfer processing unit 133 or 134 (step S105).

  Next, the normal transfer processing unit 133 or 134 that has received the received packet from the normal transfer control unit 131 corrects the control information included in the packet based on a predetermined rule, or determines a predetermined value determined based on the control information. After adding the new control information created by the above process to the packet, it is sent to the output interface unit 151 or 152. Then, the output interface unit 151 or 152 transmits the received processed packet to the connected node (step S106).

  When the transmission from the output interface unit 151 or 152 to the node is successful, the corresponding normal transfer processing unit 133 or 134 transmits the transmission source identification information, the destination identification information of the transmitted processed packet, and step S106. The information indicating the predetermined processing in which the packet has been modified in step S4, new control information added to the packet, and identification information indicating the output interface unit that has transmitted the processed packet are sent to the high-speed transfer data creation unit 132. (Step S107). If the transmission from the output interface unit to the node is not successful for some reason, nothing is sent to the high-speed transfer data creation unit 132.

  When the received packet sent from the normal transfer control unit 131 to the normal transfer processing units 133 and 134 in step S105 is a packet used for multicast or broadcast communication, the normal transfer processing units 133 and 134 Steps S106 to S107 are performed.

  Next, the high-speed transfer data creation unit 132 receives each of the above information from the normal transfer processing unit 133 or 134, and the destination identification information of each of the above information is used for multicast or broadcast communication. In this case, the value indicating the number of output interface units connected to the node among the output interface units existing in the communication apparatus 100, that is, “2” of the output interface units 151 and 152 corresponds to each of the above information. If the destination identification information is other than “1”, “1” is set as the required number of data corresponding to each piece of information.

  The high-speed transfer data creation unit 132 sets the transmission source identification information as the transmission source identification of the high-speed transfer data, the destination identification information as the destination identification, the identification information indicating the output interface unit as the output interface identification, and the required number of data Is the required data count, and information indicating the predetermined processing for correcting the received packet in step S106 and new control information added to the packet are used as additional correction data. The high-speed transfer data created in this way is stored in the high-speed transfer data storage unit 120 (step S108).

  When the high-speed transfer data already exists in the high-speed transfer data storage unit 120, the identification information indicated by the transmission source identification, the identification information indicated by the destination identification, and the identification information indicated by the output interface identification are all the same. The data newly created in step S108 is discarded without being registered.

  If the packet received from the node 170 is a packet for performing multicast or broadcast communication, the required number of data required by the high-speed transfer data creation unit 132 in step S108 is at least one existing in the communication device 100. Since it is a value indicating the number of output interface units connected to the node, it is always one value regardless of other information included in the packet. Therefore, instead of obtaining the required number of data each time in step S108, the required number of data obtained in advance is determined from the predetermined storage location in the high-speed transfer data storage unit 120 or the high-speed transfer data storage unit 120. Alternatively, the data may be stored in a dedicated storage unit (not shown) provided in the communication device 100, and the stored necessary number of data may be used in step S108.

  Further, without setting the required number of data obtained in advance to the required number of data included in each high-speed transfer data, a predetermined storage location in the high-speed transfer data storage unit 120 or a high-speed transfer data storage unit In addition to 120, the data is stored in a dedicated storage unit provided in the communication apparatus 100, and the high-speed transfer determination unit 110 acquires the number of high-speed transfer data acquired from the high-speed transfer data storage unit 120 in step S102 and The number of necessary data stored may be compared.

  As described above, in this embodiment, in a communication apparatus that creates data for high-speed transfer and performs packet transfer processing, packets are reliably transmitted from all of the plurality of output interface units used during communication by multicast or broadcast. There is an effect that it can be transmitted.

  The reason for this is that the high-speed transfer data including the same source identification information and destination identification information as the transmission source identification information and destination identification information included in the received packet is acquired, and the required number of data included in the acquired high-speed transfer data If the number of the acquired high-speed transfer data is not the same, the normal transfer process is performed without performing the transfer process using the acquired high-speed transfer data, and again, the insufficient high-speed transfer data This is because data is created and stored in the high-speed transfer data storage unit 120.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

  FIG. 4 is a block diagram showing a second embodiment of the present invention.

  Referring to FIG. 4, the present embodiment includes a communication device 500, a transmission source device 570 connected to the communication device 500, and destination devices 571 and 572 connected to the communication device 500.

  Communication device 500 includes a high-speed transfer determination unit 510, a high-speed transfer data storage unit 520, a normal transfer unit 530, a high-speed transfer unit 540, a reception unit 550, and transmission units 551 and 552.

  The receiving unit 550 receives a reception packet including transmission source identification information for identifying the transmission source device 570, destination identification information for identifying the destination devices 571 and 572, transfer control information, and transfer data.

  The transmission units 551 and 552 are provided in one-to-one correspondence with the destination devices 571 and 572, and transmit packets to the destination devices.

  The high-speed transfer data storage unit 520 is based on predetermined rules for the transmission source identification information, the destination identification information, the transmission unit identification information for identifying the transmission unit, and the transfer control information included in the received packet. The high-speed transfer data including the additional correction data indicating the contents of addition and correction to be performed is stored.

  The high-speed transfer determination unit 510 acquires the high-speed transfer data from the high-speed transfer data storage unit 520 based on the transmission source identification information and the destination identification information included in the received packet, and the number of the acquired high-speed transfer data And the number of transmission units 551 and 552 are the same, the received packet and the acquired high-speed transfer data are sent to the high-speed transfer unit 540, while the number of acquired high-speed transfer data and the transmission unit 551 and If the number 552 is different, the received packet is sent to the normal transfer unit 530.

  The high-speed transfer unit 540 replicates the received packets so as to have the same number as the high-speed transfer data received from the high-speed transfer determination unit 510, and performs additional correction included in each high-speed transfer data. Processing is performed based on the content of the data for transmission, and each processed packet is transmitted from the transmission unit indicated by the transmission means identification information included in the data for high-speed transfer.

  When the destination identification information included in the received packet is predetermined specific identification information used for multicast or broadcast communication, the normal transfer unit 530 transmits the received packet to the transmission units 551 and 552, respectively. Duplicate to the same number, add and modify transfer control information contained in each duplicated packet based on a predetermined rule, and send each duplicated packet from each transmitter, and each transmission When the transmission from the unit is successful, the high-speed transfer data is stored in the high-speed transfer data storage unit 520.

  In addition, when the destination identification information included in the received packet is not specific identification information determined in advance for multicast or broadcast communication, the normal transfer unit 530 transmits the transfer control information included in the packet. Is added and corrected based on a predetermined rule, and is transmitted from the transmission unit corresponding to the destination device indicated by the destination identification information, and when the transmission from the transmission unit is successful, the high-speed transfer data is transferred at high speed The data is stored in the data storage unit 520.

  As described above, in this embodiment, as in the first embodiment, a plurality of transmissions that are used during communication by multicast or broadcast in a communication apparatus that creates high-speed transfer data and performs packet transfer processing. There is an effect that the packet can be reliably transmitted from all of the parts.

  The reason is that when the number of high-speed transfer data acquired from the high-speed transfer data storage unit 520 by the high-speed transfer determination unit 510 is different from the number of transmission units, the high-speed transfer data using the acquired high-speed transfer data is used. This is because normal transfer processing by the normal transfer unit 530 is performed without performing transfer processing by the transfer unit 540, and high-speed transfer data is created again and stored in the high-speed transfer data storage unit 520.

DESCRIPTION OF SYMBOLS 100 Communication apparatus 110 High-speed transfer determination part 120 High-speed transfer data storage part 130 Normal transfer part 131 Normal transfer control part 132 High-speed transfer data creation part 133 Normal transfer process part 134 Normal transfer process part 140 High-speed transfer part 141 High-speed transfer control part 150 input interface unit 151 output interface unit 152 output interface unit 160 network 170 node 171 node 172 node 500 communication device 510 high-speed transfer determination unit 520 high-speed transfer data storage unit 530 normal transfer unit 540 high-speed transfer unit 550 reception unit 551 transmission unit 552 Transmission unit 570 Transmission source device 571 Destination device 572 Destination device

Claims (9)

Receiving means for receiving a reception packet including transmission source identification information for identifying a transmission source device, destination identification information for identifying a destination device, transfer control information, and transfer data;
At least one transmission means provided in a one-to-one correspondence with at least one of the destination devices, and transmitting a packet to each of the destination devices;
Contents of addition and correction performed based on predetermined rules for the transmission source identification information, the destination identification information, the transmission means identification information for identifying the transmission means, and the transfer control information included in the received packet. High-speed transfer data storage means for storing high-speed transfer data including additional correction data shown;
The high-speed transfer data is acquired from the high-speed transfer data storage unit based on the transmission source identification information and the destination identification information included in the received packet, and the number of the acquired high-speed transfer data and the transmission unit When the received packet and the acquired high-speed transfer data are sent to the high-speed transfer means, on the other hand, the acquired number of high-speed transfer data and the number of the transmission means are different Is a high-speed transfer determination means for sending the received packet to the normal transfer means;
The received packets are duplicated so as to have the same number as the high-speed transfer data, and each duplicated packet is processed based on the content of the additional correction data included in each high-speed transfer data. High-speed transfer means for transmitting the transmitted packet from the transmission means indicated by the transmission means identification information included in each of the high-speed transfer data;
The received packets are duplicated so as to have the same number as the transmitting means, and the transfer control information included in each duplicated packet is added and modified based on a predetermined rule, and each duplicated packet is transmitted from each transmitting means. And a normal transfer means for storing the high-speed transfer data in the high-speed transfer data storage means when the transmission from the transmission means is successful. . When the destination identification information included in the received packet is not predetermined identification information for performing simultaneous communication with a plurality of destination devices, the normal transfer unit sets the transfer control information included in the received packet as predetermined. Are added and modified based on the rules of the above, and transmitted from the transmission unit corresponding to the destination device indicated by the destination identification information, and when the transmission from the transmission unit is successful, the high-speed transfer data is transmitted to the high-speed transfer The communication apparatus according to claim 1, wherein the communication apparatus stores the data in a data storage unit. The high-speed transfer data acquired by the high-speed transfer determination unit from the high-speed transfer data storage unit includes the transmission source identification information and the destination identification information included in the received packet, and the high-speed transfer data. The communication apparatus according to claim 1, wherein the transmission source identification information and the destination identification information are the same. Transmission source identification information for identifying a transmission source device, destination identification information for identifying a destination device, and transmission unit identification information for identifying a transmission unit that is provided in a one-to-one correspondence with the destination device and that transmits a packet to each destination device And high-speed transfer data storage means for storing high-speed transfer data including addition correction data indicating the contents of addition and correction performed on the transfer control information included in the received packet based on a predetermined rule In
Receiving a reception packet including the transmission source identification information, the destination identification information, the transfer control information, and transfer data;
Obtaining the high-speed transfer data from the high-speed transfer data storage means based on the transmission source identification information and the destination identification information included in the received packet;
When the acquired number of high-speed transfer data and the number of the transmission means are the same, the received packets are duplicated so as to be the same number as the high-speed transfer data, and each of the duplicated packets is transferred to the high-speed transfer. Processing based on the content of the additional correction data included in the data for transmission, and transmitting each processed packet from the transmission means indicated by the transmission means identification information included in each of the high-speed transfer data,
On the other hand, when the acquired number of the high-speed transfer data and the number of the transmission means are different, the received packet is duplicated so as to be the same number as the transmission means, and the duplicated packet is included in each duplicated packet. The transfer control information is added and corrected based on a predetermined rule, and each of the duplicated packets is transmitted from each of the transmission units, and when the transmission from the transmission unit is successful, the high-speed transfer data is A packet transfer method characterized by storing in a high-speed transfer data storage means. If the high-speed transfer data cannot be obtained from the high-speed transfer data storage unit based on the transmission source identification information and the destination identification information included in the received packet, the transfer control information included in the received packet is set to a predetermined value. Are added and modified based on the rules of the above, and transmitted from the transmission unit corresponding to the destination device indicated by the destination identification information, and when the transmission from the transmission unit is successful, the high-speed transfer data is transmitted to the high-speed transfer The packet transfer method according to claim 4, wherein the packet is stored in a data storage means. The high-speed transfer data acquired from the high-speed transfer data storage unit based on the transmission source identification information and the destination identification information included in the reception packet includes the transmission source identification information and the destination included in the reception packet. 6. The packet transfer method according to claim 4, wherein the identification information is the same as the transmission source identification information and the destination identification information included in the high-speed transfer data. Transmission source identification information for identifying a transmission source device, destination identification information for identifying a destination device, and transmission unit identification information for identifying a transmission unit that is provided in a one-to-one correspondence with the destination device and that transmits a packet to each destination device A first storage process for storing data for high-speed transfer, including additional correction data indicating the contents of addition and correction performed based on a predetermined rule with respect to transfer control information included in the received packet;
A reception process for receiving a reception packet including the transmission source identification information, the destination identification information, the transfer control information, and transfer data;
An acquisition process for acquiring the high-speed transfer data based on the transmission source identification information and the destination identification information included in the received packet;
When the number of high-speed transfer data acquired in the acquisition process is the same as the number of destination devices, the received packet is duplicated so as to be the same number as the high-speed transfer data. A process is performed based on the content of the additional correction data included in the high-speed transfer data, and each processed packet is transmitted from the transmission means indicated by the transmission means identification information included in each of the high-speed transfer data. Sending process,
On the other hand, if the acquired number of the high-speed transfer data and the number of destination devices are different, the received packet is duplicated to be the same number as the number of destination devices, and is included in each duplicated packet. Adding and modifying the transfer control information based on a predetermined rule, and transmitting each of the duplicated packets from each of the transmission means,
A packet transfer program for causing a computer to execute a second storage process for storing the high-speed transfer data when the second transmission process is successful. When the high-speed transfer data cannot be acquired by the acquisition process, the transfer control information included in the received packet is added and corrected based on a predetermined rule, and the destination identification information included in the received packet indicates A third transmission process for transmitting from the transmission means corresponding to the destination device;
The packet transfer program according to claim 7, wherein when the third transmission process is successful, the computer executes a third storage process for storing the high-speed transfer data. The high-speed transfer data acquired in the acquisition process includes the transmission source identification information and the destination identification information included in the received packet, and the transmission source identification information and the destination identification information included in the high-speed transfer data. The packet transfer program according to claim 7 or 8, wherein each of the same is the same.

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