WO2006013811A1 - 情報処理システム、情報処理装置、サーバ装置、情報処理方法及びプログラム - Google Patents
情報処理システム、情報処理装置、サーバ装置、情報処理方法及びプログラム Download PDFInfo
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- WO2006013811A1 WO2006013811A1 PCT/JP2005/014020 JP2005014020W WO2006013811A1 WO 2006013811 A1 WO2006013811 A1 WO 2006013811A1 JP 2005014020 W JP2005014020 W JP 2005014020W WO 2006013811 A1 WO2006013811 A1 WO 2006013811A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
Definitions
- Information processing system information processing apparatus, server apparatus, information processing method, and program
- the present invention relates to an information processing system and the like that detect a port maintenance time of a communication processing device.
- an information processing system including an information processing device, a communication processing device, and a server device
- information processing devices such as home PCs (Personal Computers) and home appliances are also transmitted via the communication processing device.
- a predetermined packet is periodically transmitted to the server device.
- the communication processing apparatus is, for example, a router having a NAT (Network Address Translation) function.
- the predetermined packet is used, for example, to know whether the IP address on the WAN (Wide Area Network) side of the communication processing device has changed, or from the external device such as a mobile phone to the information processing device.
- the Internet that is, to ensure that packets on the WAN side are sent to the information processing device via the communication processing device
- a communication processing device having a NAT function such as a router
- the private IP address and port number on the LAN side are assigned to the global IP on the WAN side. Convert to address and port number.
- the packet is transferred to the information processing device by performing reverse conversion.
- a time for performing such address conversion is set. More specifically, after a certain period of address conversion is performed between the WAN side and the LAN side for a predetermined period of time, the address conversion for the received packet on the WAN side is not performed (LAN For packets received from the side New address translation will be performed). In other words, the packet from the WAN side is not received by the information processing apparatus, and the information processing apparatus cannot be accessed from the external apparatus such as a mobile phone via the server apparatus. This predetermined period is called the port maintenance time.
- the communication processing apparatus in order to enable the information processing apparatus to receive information from the server apparatus, the communication processing apparatus constantly responds to packets from the server apparatus (ie, from the WAN side). Address translation must be enabled. Therefore, even when there is no need to exchange information between the information processing device and the server device, packets are periodically transmitted from the information processing device to the server device via the communication processing device. Therefore, it is necessary for the communication processing device to be able to perform address conversion on the transmitted packet. In this case, there is a request to make the transmission cycle of packets periodically transmitted by the information processing apparatus as long as possible. This is to reduce unnecessary packet transmission and to reduce the processing burden caused by packet transmission in the information processing device. Specifically, the transmission cycle of packets periodically transmitted by the information processing device is slightly shorter (for example, 1 or 2 seconds) than the port maintenance time of the communication processing device to which the information processing device is connected. It only has to be time.
- an information processing system includes an information processing device, a server device, and a communication processing device that performs processing related to communication between the information processing device and the server device.
- the information processing device transmits a request packet, which is a bucket requesting transmission of a reply packet transmitted from the server device to the information processing device via the communication processing device.
- a request packet transmission control unit that controls transmission of the request packet by the request packet transmission unit, and a reply received by the return packet reception unit.
- a port maintenance time detection unit that detects the port maintenance time of the communication processing device based on the packet, and the server device receives the request packet and transmits a reply packet to send a reply packet.
- a reply packet transmission control unit that controls transmission of a reply bucket based on the request packet received by the request packet receiving unit.
- FIG. 1 is a block diagram showing a configuration of an information processing system according to Embodiment 1 of the present invention.
- FIG. 2 is a flowchart showing the operation of the information processing apparatus according to the first embodiment.
- FIG. 3 is a flowchart showing the operation of the server apparatus according to the first embodiment.
- FIG. 4A is a diagram showing a configuration of a request packet and a reply packet in the first embodiment.
- FIG. 4B shows a structure of a request packet and a reply packet in the first embodiment.
- FIG. 4C is a diagram showing a configuration of a request packet and a reply packet in the first embodiment.
- FIG. 4D is a diagram showing a structure of a request packet and a reply packet in the first embodiment.
- FIG. 5 is a diagram for explaining transmission and reception of a request packet and a reply packet in the first embodiment.
- FIG. 6 is a flowchart showing the operation of the information processing apparatus according to the first embodiment.
- FIG. 7 is a diagram for explaining transmission of a request packet and reception of a reply packet in the first embodiment.
- FIG. 8 is a diagram for explaining transmission of a request packet and reception of a reply packet in the first embodiment.
- FIG. 9 is a flowchart showing the operation of the information processing apparatus according to the first embodiment.
- FIG. 10 is a diagram for explaining transmission of a request packet and reception of a reply packet in the first embodiment.
- FIG. 11 is a block diagram showing a configuration of an information processing system according to Embodiment 2 of the present invention.
- FIG. 12 is a flowchart showing the operation of the information processing apparatus according to the second embodiment.
- FIG. 13 is a diagram for explaining transmission of a request packet and reception of a reply packet in the second embodiment.
- FIG. 14 is a diagram for explaining a relationship between a packet round-trip time and a port maintenance time in the second embodiment.
- FIG. 1 is a block diagram showing a configuration of an information processing system according to the first embodiment.
- the information processing system according to the first embodiment includes an information processing device 1, a communication processing device 2, and a server device 3.
- a single information processing device 1 is connected to the communication processing device 2, but two or more information processing devices are connected to the communication processing device 2. Also good.
- the information processing apparatus 1 is, for example, a computer, a microwave oven, a telephone set, a printer, a facsimile machine, a refrigerator, a washing machine, an air conditioner, a television, a video recording device, a set top box, or the like.
- the communication processing device 2 and the server device 3 are connected via a wired or wireless communication line 4.
- the communication line 4 is, for example, an internet or an intranet.
- the information processing apparatus 1 includes a request packet transmission unit 11, a reply packet reception unit 12, a port maintenance time detection unit 13, and a request packet transmission control unit 14.
- the request packet transmission unit 11 transmits one or more request packets to the server device 3 via one port of the communication processing device 2.
- the request packet is a packet that requests the server apparatus 3 to transmit a reply packet.
- This request packet is, for example, a packet having a UDP header.
- the payload of the request packet includes wait time information.
- the waiting time information is information regarding the waiting time until the request packet reception power and the reply packet are transmitted in the server device 3.
- This waiting time information For example, it may be information indicating the waiting time (for example, information indicating that the waiting time is 2 minutes), and information having a predetermined relationship with the waiting time (for example, when the waiting time is 1 minute 58 seconds) Or 2 minutes plus 2 seconds). In the first embodiment, the former case will be described.
- the reply packet is a packet transmitted from the server device 3 to the information processing device 1 via the communication processing device 2. Depending on whether or not the information processing apparatus 1 can receive the reply packet, the port maintenance time in the communication processing apparatus 2 is detected (which will be described later
- the request packet transmitter 11 may or may not include a transmission device (for example, a modem or a network card) for performing transmission (in this case, the request packet transmitter 11). (There will be a transmitting device, not shown). Further, the request packet transmission unit 11 may be realized by hardware or may be realized by software such as a driver that drives a transmission device.
- a transmission device for example, a modem or a network card
- the request packet transmission unit 11 may be realized by hardware or may be realized by software such as a driver that drives a transmission device.
- the reply packet receiving unit 12 receives the reply packet transmitted from the server device 3. This reply packet is transmitted through the port of the communication processing device 2 through which the request packet has passed. As will be described later, the reply packet receiving unit 12 does not receive all reply packets transmitted from the server device 3! / ⁇ . Of the reply packets sent from server device 3, the reply packet sent to communication processing device 2 after the port maintenance time of the port through which the request packet has passed is sent from communication processing device 2 to information processing device 1 It is because it is not transmitted with respect to.
- the reply packet receiving unit 12 may or may not include a receiving device (for example, a modem or a network card) for receiving (in this case, the reply packet receiving unit 12 is illustrated outside the reply packet receiving unit 12). There will be no receiving device).
- the reply packet receiving unit 12 may be realized by hardware, or may be realized by software such as a driver that drives the receiving device.
- the port keeping time detector 13 detects the port keeping time of the communication processing device 2 based on the reply packet received by the reply packet receiver 12.
- the detection of the port maintenance time in the first embodiment is performed based on the longest waiting time among the waiting times corresponding to the reply packet received by the reply packet receiving unit 12.
- the “waiting time corresponding to the request” is the waiting time corresponding to the waiting time information included in the request packet that requested transmission of the reply packet.
- “based on the longest wait time” means that a time different from the longest wait time that may be detected as the port maintenance time is detected as the port maintenance time. Moyo.
- the longest time different from the waiting time is, for example, a time considering the packet round-trip time between the information processing device 1 and the server device 3 with respect to the longest waiting time. Note that the consideration of the packet round-trip time will be described in the second embodiment to be described later.
- “port maintenance time” may refer to information indicating the port maintenance time detected by the port maintenance time detector 13.
- the port maintenance time detected by the port maintenance time detector 13 may be the port maintenance time itself of the communication processing device 2 or may be a time shorter than the port maintenance time of the communication processing device 2. Good. For example, when the port maintenance time of the communication processing device 2 is 2 minutes, the port maintenance time detector 13 may detect the port maintenance time of the communication processing device 2 as 1 minute 50 seconds. Note that the port maintenance time detected by the port maintenance time detector 13 may be set as a cycle for transmitting packets to a transmitter (not shown) that periodically transmits packets. It may be displayed on a display device or the like that may be stored in a recording medium or the like or transmitted to another device or the like. Thus, the use of the detected port maintenance time does not matter.
- the request packet transmission control unit 14 controls the transmission of the request packet by the request packet transmission unit 11 using a binary search method based on whether or not the reply packet reception unit 12 has received the reply packet.
- Control of request packet transmission by the request packet transmitter 11 includes setting of waiting time information included in the request packet transmitted by the request packet transmitter 11, and control of request packet transmission timing by the request packet transmitter 11. Etc. More specifically, the request packet transmission control unit 14 determines a waiting time using a binary search method based on whether or not a reply packet is received by the reply packet receiving unit 12, and the determined waiting time.
- the request bucket transmitter 11 is controlled so as to transmit a request packet having waiting time information according to the request. Details of this processing will be described later.
- the communication processing device 2 performs processing related to communication between the information processing device 1 and the server device 3. Do.
- the communication processing device 2 according to the first embodiment has a NAT function, and is called a router, for example.
- the communication processing device 2 according to the first embodiment uses the source address information (that is, the address information of the information processing device 1) contained in the packet transmitted from the information processing device 1 as the WAN of the communication processing device 2. Side address information.
- the source (source) address (private IP address and address A) included in the packet transmitted from the information processing device 1, the source (source) port number (port number) B)) is converted into the WAN-side global IP address (address X) and port number (port number Y) of the communication processing device 2.
- Packets sent from server device 3 to WAN address X and port number Y of communication processing device 2 are converted to destination address X and port number Y as address A and port number B of information processing device 1.
- the global IP address is an address for an information processing apparatus to communicate with an external apparatus (for example, an external apparatus connected to a WAN (Internet etc.)).
- IP address may be, for example, the current so-called IPv4 address, or may be another version of an address such as an IPv6 address.
- a reception filter rule When a reception filter rule is set in communication processing device 2, a packet is received based on the reception filter rule.
- the reception filter rule if the packet destination address and port number are address P and port number Q, respectively, for example, the destination address and port from the LAN side to the WAN side of the communication processing device 2
- an address sensitive filter that only receives packets from the address P, and only receives packets from the port number Q !, There are Port Sensitive filters and No filters (no packets with any address and any port number) that do not exist.
- the communication processing device 2 receives a packet when it accepts a packet from the WAN side at the port of the communication processing device 2 assigned to the packet transmitted from the information processing device 1 on the LAN side, and performs address conversion. line V, sending the packet to the information processing device 1 on the LAN side.
- the server device 3 includes a request packet receiver 31, a reply packet transmitter 32, and a reply packet transmission controller 33.
- the request packet receiving unit 31 receives a request packet transmitted from the information processing device 1 via a predetermined port of the communication processing device 2.
- the request packet receiving unit 31 may or may not include a receiving device (for example, a modem or a network card) for receiving (in this case, the request packet receiving unit 31). (There will be an unrecognized receiving device outside the device). Further, the request packet receiving unit 31 may be realized by hardware or may be realized by software such as a driver that drives a receiving device.
- the reply packet transmitting unit 32 receives the reply packet, and transmits the reply packet to the port of the communication processing device 2 through which the request packet that requested transmission of the reply packet has passed.
- the transmission of the reply packet is performed based on control of a reply packet transmission control unit 33 described later.
- This reply packet is, for example, a packet having a UDP header.
- the payload of the reply packet may include, for example, information for identifying the request packet received by the request packet receiving unit 31 (for example, waiting time information or other identification information).
- the reply packet transmission unit 32 may or may not include a transmission device (for example, a modem or a network card) for performing transmission (in this case, outside the reply packet transmission unit 32). There will be a transmitting device (not shown).
- the reply packet transmission unit 32 may be realized by hardware, or may be realized by software such as a driver that drives a transmission device.
- the reply packet transmission control unit 33 controls the reply packet transmission unit 32 to transmit a reply packet based on the request packet received by the request packet reception unit 31.
- the reply packet transmission control unit 33 controls transmission of the reply packet based on the waiting time information included in the request packet.
- the waiting time information included in the request packet is, for example, information indicating the waiting time (for example, information indicating that the waiting time is 2 minutes)
- the reply packet transmission control unit 33 When the waiting time (for example, 2 minutes) indicated by the waiting time information has elapsed since 31 received the request packet, the reply packet sending unit 32 is controlled to send a reply packet, and is included in the request packet.
- the waiting time information is, for example, information having a predetermined relationship with the waiting time (for example, when the waiting time is 1 minute 58 seconds, information indicating 2 minutes by adding 2 seconds)
- the waiting time for example, 1 minute 58 seconds
- the return packet sending portion 32 is controlled so as to send a reply packet.
- the time when the waiting time has passed may be the exact time when the waiting time has passed, or the exact time force when the waiting time has passed is also the time when the time related to control has passed. Moyo.
- FIG. 2 is a flowchart showing the operation of the information processing apparatus 1 according to the first embodiment.
- Step S 101 The request packet transmission control unit 14 sets a waiting time corresponding to the request packet transmitted by the request packet transmission unit 11.
- setting the waiting time means, for example, recording the waiting time in a predetermined memory or the like.
- Step S 102 The request packet transmitter 11 sends a request packet having waiting time information corresponding to the waiting time set in step S 101 or step S 107 described later to the server device 3. Send.
- Step S 103 The reply packet receiving unit 12 determines whether or not the reply packet transmitted from the server apparatus 3 has been received in response to the request bucket transmitted in step S 102. If a reply packet is received, the process proceeds to step S104, and if not, the process proceeds to step S105. (Step S 104)
- the reply packet receiving unit 12 performs a predetermined reception process based on the received reply packet.
- the predetermined reception processing is, for example, passing the received reply packet or the waiting time information included in the reply packet to the port keeping time detection unit 13 and the request packet transmission control unit 14, or
- the waiting time information included in the received reply packet is stored in a predetermined memory.
- Step S 105 The request packet transmission control unit 14 determines whether or not a timeout has occurred.
- the time-out means that the timing at which the request packet transmitting unit 11 should receive the reply packet corresponding to the request packet has already passed. For example, after the request packet transmitting unit 11 transmits a request packet, a request packet that can be determined to be timed out when the waiting time related to the waiting time information included in the request packet has passed is received from the communication processing device 2.
- the request packet sending unit 11 It may be determined that a timeout has occurred when a predetermined time (for example, 1 or 2 seconds) is added to the waiting time related to the waiting time information included in the request packet. If it is time-out, the process proceeds to step S106; otherwise, the process returns to step S103.
- a predetermined time for example, 1 or 2 seconds
- the request packet transmission control unit 14 determines whether or not to detect the port maintenance time, that is, whether or not to end the transmission of the request packet. For example, when the return packet receiving unit 12 receives a reply packet transmitted in response to the request packet transmitted by the request bucket transmitting unit 11 for the first time, it may be determined that the port maintenance time is detected. It is possible to determine that the port maintenance time is detected after the request packet has been transmitted a predetermined number of times, and the wait time corresponding to the wait time information included in the request packet transmitted by the request packet transmission unit 11 and the request packet If the difference from the waiting time according to the waiting time information contained in the request packet sent one before is smaller than the predetermined value, it may be determined that the port maintenance time is detected.
- the request packet transmitter 11 may determine that the port maintenance time is detected after a predetermined time has elapsed after the first request packet is transmitted. Specific examples of these will be described later. Detect port maintenance time In such a case, the fact is notified to the port keeping time detection unit 13 and the process proceeds to step S108. Otherwise, the process proceeds to step S107.
- Step S 107 The request packet transmission control unit 14 sets a waiting time corresponding to a newly transmitted request packet using a binary search method. Then, the process returns to step S102.
- the waiting time setting using the binary search method means that the waiting time corresponding to the reply packet received by the information processing device 1 and the powerful response that cannot be received by the information processing device 1!
- the central waiting time with the waiting time corresponding to the packet is set as the waiting time of the next request packet to be transmitted.
- a reply packet corresponding to the first waiting time cannot be received, and the second waiting time (a time smaller than the first waiting time is set). If the reply packet corresponding to) is received, the central waiting time between the first waiting time and the second waiting time (referred to as the “third waiting time”) is Set as waiting time for request packets to be sent. If a reply packet corresponding to the third waiting time is received, the central waiting time between the third waiting time and the first waiting time is set as the waiting time of the next request packet to be transmitted. If a response packet corresponding to the third waiting time cannot be received, the central waiting time between the third waiting time and the second waiting time is set as the next request packet to be transmitted. Repeat the process of setting the waiting time. Details of the setting process will be described later.
- Step S108 The port keeping time detector 13 determines the port keeping time based on the longest waiting time among the waiting times corresponding to the reply packets received by the reply packet receiver 12 so far. Is detected. Then, a series of processing for detecting the port maintenance time of the communication processing device 2 is completed.
- Step S201 The request packet receiver 31 determines whether a request packet has been received. If the request packet is received, the process proceeds to step S202. Otherwise, the process proceeds to step S203. [0040] (Step S202) The reply packet transmission control unit 33 starts measuring the request packet received by the request packet receiving unit 31. For example, the reply packet transmission control unit 33 starts a timer for measuring the waiting time according to the waiting time information included in the received request packet. Then, the process returns to step S201.
- Step S203 The reply packet transmission control unit 33 determines whether it is time to transmit the reply packet. Here, whether or not it is the timing to transmit the reply packet is determined by, for example, whether or not the waiting time corresponding to the waiting time information has elapsed since the start of the timing in step S202. If it is time to send a reply packet, the process proceeds to step S204; otherwise, the process returns to step S201.
- Step S 204 The reply packet transmitter 32 transmits a reply packet.
- This reply packet includes, for example, waiting time information included in the request packet received by the request packet receiving unit 31. Then, the process returns to step S201.
- the port maintenance time detector 13 detects the port maintenance time after the request packet is transmitted four times.
- the reply packet receiver 12 receives the reply packet.
- the request packet transmission control unit 14 receives a reply packet corresponding to the transmitted request packet by the reply packet receiving unit 12 and has responded by the reply packet receiving unit 12 until then. Controls the request packet transmitter 11 to transmit a request packet having waiting time information corresponding to a waiting time longer than the waiting time corresponding to the received reply packet when the packet is not received. The case where it does is demonstrated.
- FIG. 4A and FIG. 4B are diagrams showing configurations of a request packet and a reply packet in the following specific example. Both the request packet and the reply packet have a UDP header.
- the queue includes waiting time information.
- the waiting time information included in the reply packet is assumed to be the same as the waiting time information included in the payload of the request packet that requested transmission of the reply packet.
- FIG. 5 is a diagram for explaining a port through which a request packet and a reply packet pass in the following specific example.
- the request packet transmitted from the information processing apparatus 1 is transmitted from the port P1.
- the request packet passes through port P 2 on the WAN side of communication processing device 2 and is received at port P 3 of server device 3.
- the port P2 of the communication processing device 2 through which the request packet passes is newly assigned in the communication processing device 2 when the first request packet passes through the port P2. That is, it is important to transmit the request packet using the port of the communication processing device 2 that is not used for communication with other information processing devices or server devices. Otherwise, for example, when port P2 has been used for other purposes, and the transmission power of the request packet is also transmitted through port P2 before the reply packet is transmitted. This is because the accurate port maintenance time cannot be detected.
- a new port P1 of the information processing device 1 is used. Use the port (used for other communications, the port)!
- a reply packet transmitted in response to the request packet transmitted from the information processing apparatus 1 is transmitted from the port P3 that has received the request packet. If the port maintenance time has not elapsed, the reply packet passes through port P2 of communication processing device 2 and is received at port P1 of information processing device 1. On the other hand, when the port maintenance time has elapsed, the reply packet is not transmitted from the communication processing device 2 to the information processing device 1. As can be seen from FIG. 5, in the information processing system according to the first embodiment, the request packet and the reply packet pass through one port P2 of the communication processing device 2.
- a new port (for example, port P4 different from port P2 etc.) is sent in communication processor 2. ) May be assigned, or port P2 may be used again. This depends on the specifications of the communication processing device 2. However, in either case, the processing itself is significant. Since there is no significant difference (since port P2 only changes to port P4, etc.), for the convenience of explanation, the request packet sent from port P1 of information processing device 1 after the port maintenance time elapses. The case where port P2 is assigned will be described.
- IP addresses of the information processing device 1, the communication processing device 2, and the server device 3 are as follows. Note that the IP address of the communication processing device 2 is an address on the WAN side.
- Information processing device 1 192. 168. 0. 1
- FIG. 6 is a flowchart showing the process of step S107 in the flowchart of FIG. 2 in this specific example.
- Step S301 The request packet transmission control unit 14 determines whether or not the reply packet receiving unit 12 has received a reply packet corresponding to the request packet transmitted immediately before. That is, it is determined whether or not the response packet has been received in the immediately preceding step S103, or whether or not a timeout has occurred in step S105.
- the reply packet corresponding to the transmitted request packet is received by the reply packet receiving unit 12, the process proceeds to step S302, and the reply packet corresponding to the transmitted request packet is transmitted to the reply packet receiving unit 12. If not received, the process proceeds to step S303.
- Step S302 The request packet transmission control unit 14 waits for the reply packet received immediately before and the wait time for the reply packet that has not been received by the reply packet receiver 12 so far.
- the waiting time corresponding to the middle waiting time is set as the waiting time for the next request packet to be transmitted. Then, the process of step S107 is finished.
- step S107 flowchart in FIG. 6
- step S302 without determining whether or not there is a reception
- Step S303 The request packet transmission control unit 14 transmits the first request packet in the past, that is, until the determination of the strength (determination of step S303 at that time)
- the reply packet receiving unit 12 determines whether or not the packet is received. If one or more reply packets have been received by the reply packet receiver 12 until then, the process proceeds to step S304, and if the reply packet has been received by the reply packet receiver 12 until then. Advances to step S305.
- Step S304 The request packet transmission control unit 14 responds to the waiting time corresponding to the powerful reply packet that has not been received immediately before and the reply packet that has been received by the reply packet receiver 12 so far.
- the middle waiting time with the longest waiting time is set as the waiting time for the next request packet to be sent. Then, the process of step S107 ends.
- Step S305 The request packet transmission control unit 14 sets a waiting time that is half of the waiting time corresponding to the strong reply packet that has not been received immediately before as a waiting time for the next request packet to be transmitted. To do. Then, the process of step S107 ends.
- the central waiting time between a certain waiting time and another waiting time may be a central waiting time in the strict sense of both waiting times, or both waiting times. It may be the waiting time near the center.
- the latter includes, for example, the waiting time rounded to the nearest less than 1 second (ie, 0.1 second unit) for the waiting time in the middle of both waiting times.
- the port maintenance time of the communication processing device 2 is 1 minute 20 seconds.
- the information processing device The request packet transmission control unit 14 of 1 sets the waiting time to 2 minutes (step S101).
- the request packet transmission unit 11 configures waiting time information indicating that the waiting time is 2 minutes, and sends the UDP request packet having the waiting time information in the payload to the IP address 155. 32.10 of the server device 3.
- Send to 10 port P3 step S102.
- the information processing apparatus 1 returns a response corresponding to the request packet.
- the process of waiting for reception of a reply packet is performed until a timeout occurs until the power of receiving the received packet is reached (steps S103 and S105).
- the request packet transmitted from the information processing device 1 is converted into the source address power 192. 168. 0. 1 force and the like 202. 132. 10. 6 in the communication processing device 2, and the source port power S port P1 To port P2 and sent to port P3 of server device 3.
- the request packet is received by the request packet receiver 31 of the server device 3 (step S 201). Then, a timer is started in reply packet transmission control unit 33 (step S202).
- the reply packet transmission control unit 33 determines that it is time to send the reply packet (step S 203 ), A reply packet having waiting time information included in the request packet received by the request packet receiving unit 31 is sent to the reply packet transmitting unit 32, and the IP address 202.132 of the communication processing device 2 that is the transmission source of the request packet. 10. 6. Pass the instruction to send to port P2. Then, the reply packet transmitting unit 32 transmits a reply packet having waiting time information indicating the waiting time “2 minutes” to the port P2 of the communication processing device 2 (step S204).
- the reply packet sent from the server device 3 is not address-converted in the communication processing device 2, and the reply packet is information Not sent to processing unit 1. Therefore, the request packet transmission control unit 14 of the information processing apparatus 1 transmits the request packet having the waiting time information indicating the waiting time “2 minutes” to the waiting time of 5 minutes (this 5 seconds). Is determined to be timed out when 2 minutes and 5 seconds have elapsed after adding the transmission time of the request packet, etc. (step S105). In this case, the request packet has not been transmitted four times, and the reply packet receiving unit 12 has not received a reply packet transmitted in response to the request packet transmitted the first time. It is determined that no time is detected (step S106).
- the reply packet corresponding to the transmitted request packet is not received by the reply packet receiver 12 (step S301), and no reply packet has been received by the reply packet receiver 12 until then. (Step S303) Since this is the situation, the request packet transmission control unit 14 waits for the reply packet that has not been received. That is, the request packet transmitting unit 11 is controlled to transmit a request packet having waiting time information indicating a waiting time “1 minute” which is half of the time “2 minutes”. Specifically, the request packet transmission control unit 14 sets a waiting time of 1 minute (steps S305 and S107).
- a request packet having waiting time information indicating the waiting time “1 minute” is transmitted again to the server device 3 via the port P 2 of the communication processing device 2 ( Step S 102). Then, a reply packet is transmitted from the server apparatus 3 one minute after the server apparatus 3 receives the request packet.
- the reply packet is address-converted in the communication processing device 2 and transmitted to the information processing device 1.
- the reply packet is received by the reply packet receiving unit 12 (step S103), and the waiting time “1 minute” indicated by the waiting time information included in the reply packet is transmitted to the port maintenance time detecting unit 13 and the request packet transmission. Passed to the control unit 14.
- the port keeping time detection unit 13 stores the received waiting time “1 minute” in a storage unit (not shown) (step S 104).
- step S106 since the request packet has not been transmitted four times, it is determined that the port maintenance time is not detected (step S106).
- the reply packet corresponding to the waiting time of 1 minute is received by the reply packet receiving unit 12 (step S301), and the reply packet corresponding to the waiting time of 2 minutes is not received.
- “30 seconds” is set as a waiting time (steps S302 and S107).
- the request packet having the waiting time information indicating the waiting time “1 minute 30 seconds” is transmitted again to the server device 3 via the port P2 of the communication processing device 2. (Step S102). Then, a reply packet is transmitted from the server device 3 1 minute and 30 seconds after the server device 3 receives the request packet.
- the reply packet transmitted from the server device 3 is not address-converted in the communication processing device 2, and the reply packet is information Not sent to processing unit 1. Therefore, the request packet transmission control unit 14 of the information processing apparatus 1 determines that a timeout has occurred (step S 105). Even in this case, Since the request packet has not been transmitted four times, it is determined that the port maintenance time is not detected (step S106).
- the reply packet corresponding to the waiting time of 1 minute 30 seconds is not received by the reply packet receiver 12 (step S301), and one or more replies have been received by the reply packet receiver 12 until then. Since the packet has been received (step S303), the waiting time corresponding to the reply packet that has not been received "1 minute 30 seconds" and the waiting time corresponding to the reply packet received by the reply packet receiver 12 so far The longest waiting time! The waiting time “1 minute 15 seconds” in the middle of the waiting time “1 minute” is set as the waiting time (steps S304, S10 7).
- the request packet having the waiting time information indicating the waiting time “1 minute 15 seconds” is again transmitted to the server device 3 via the port P2 of the communication processing device 2 ( Step S102). Then, a reply packet is transmitted from the server device 3 one minute and 15 seconds after the server device 3 receives the request packet.
- the reply packet sent from server device 3 is address-converted in communication processing device 2, and the reply packet is information Sent to processor 1
- the reply packet is received by the reply packet receiver 12 (step S103), and the waiting time “1 minute 15 seconds” indicated by the wait time information included in the reply packet is transmitted to the port maintenance time detector 13 and the request packet transmission. Passed to control unit 14. Note that the port keeping time detector 13 stores the received waiting time “1 minute 15 seconds” in the storage means, not shown (step S104).
- the request packet transmission control unit 14 determines that it is time to detect the port maintenance time (step S106).
- the port maintenance time detection unit 13 then maintains the port of the communication processing device 2 with “1 minute 15 seconds” which is the longest waiting time among the waiting times received from the reply packet receiving unit 12 so far. Detect as time (step S108).
- the detected port maintenance time is stored in, for example, a predetermined recording medium (not shown) and used as a periodic packet transmission cycle to the server device 3.
- the detected port maintenance time may be used by the information processing apparatus 1 or another information processing apparatus connected to the LAN side of the communication processing apparatus 2.
- the transmission destination of a packet that is periodically transmitted using the port maintenance time may be the server device 3 or another server device.
- a time shorter than the detected port maintenance time may be used as the transmission cycle of the periodically transmitted packets.
- FIG. 7 is a diagram for explaining transmission of a request packet and reception (or non-reception) of a reply packet in this specific example.
- a request packet corresponding to each of the waiting times “2 minutes”, “1 minute”, “1 minute 30 seconds”, and “1 minute 15 seconds” is transmitted. Since the reply packet corresponding to “1 minute 15 seconds” was received, the port maintenance time was detected as 1 minute 15 minutes.
- the port maintenance time of the communication processing device 2 is “1 minute 20 seconds”, but when the port maintenance time of the communication processing device 2 is “5 minutes”.
- the information processing apparatus 1 receives a reply packet corresponding to the request packet transmitted for the first time. In that case, when the first reply packet is received, it is determined that it is the timing to detect the port maintenance time (step S106), and the port maintenance time is detected as ⁇ min (step S108). .
- FIG. 8 is a diagram for explaining the transmission of the request packet and the reception of the return packet in that case.
- FIG. 9 is a flowchart showing the process of step S107 in the flowchart of FIG. 2 in this specific example.
- the processes other than steps S401 and S402 are the same as the description of the flowchart in FIG.
- Step S401 The request packet transmission control unit 14 cannot receive the transmitted reply packet in the reply packet receiving unit 12 in the past, that is, until the first request packet is transmitted and the determination is made. Judge whether there was power. If no reply packet has been received by the reply packet receiver 12 until then, the process proceeds to step S302, and no reply packet has been received by the reply packet receiver 12 until then. If YES, go to step S402.
- Step S402 The request packet transmission control unit 14 sets a waiting time longer than the waiting time corresponding to the reply packet received immediately before as the waiting time of the request packet to be transmitted next. To set. Then, the process of step S107 ends.
- the waiting time longer than a certain waiting time is, for example, a waiting time obtained by adding a predetermined time (for example, 2 minutes) to a certain waiting time. It may be a time multiplied by a predetermined value (for example, twice the waiting time).
- FIG. 10 is a diagram for explaining the transmission of the request packet and the reception (or non-reception) of the return packet in this specific example.
- the port maintenance time of the communication processing device 2 is “5 minutes 30 seconds”.
- the request packet transmission control unit 14 has received the reply packet corresponding to the transmitted request packet, and the reply packet receiving unit 12 has received the reply packet until then. Controls the request packet transmitter 11 to transmit a request packet corresponding to a waiting time obtained by adding 2 minutes to the waiting time corresponding to the received reply packet when it is determined that the reply packet is not received.
- a waiting time obtained by adding 2 minutes to the waiting time corresponding to the received reply packet when it is determined that the reply packet is not received.
- step S102 a request packet having waiting time information indicating a waiting time of 2 minutes is transmitted (step S102). It is assumed that a reply packet transmitted in response to the request packet is received by the reply packet receiver 12 (step S103). Then, the request packet transmission control unit 14 receives the reply bucket corresponding to the waiting time “2 minutes” and transmits the first reply packet, so that the reply packet is not received until then. Judgment (steps S301, S401) and send a request packet with waiting time information indicating a waiting time of 4 minutes, which is 2 minutes added to the waiting time ⁇ 2 minutes '' corresponding to the received reply packet (Steps S402, S107, S102).
- step S103 Assume that a reply packet transmitted in response to the request packet is received by reply packet receiver 12 (step S103). Then, the request packet transmission control unit 14 receives the reply packet corresponding to the waiting time “4 minutes”, and has received all the reply packets transmitted in response to the request packet transmitted the first time and the second time. Therefore, it is determined that no reply packet has been received before (steps S301 and S401), and the received reply packet is Control is performed to transmit a request packet having waiting time information indicating a waiting time of 6 minutes obtained by adding 2 minutes to the waiting time “4 minutes” corresponding to the packet (steps S402, S107, S102).
- a reply packet transmitted in response to the request packet is not transmitted to information processing apparatus 1. This is because the port maintenance time in the communication processing device 2 has elapsed in this case. Therefore, the request packet transmission control unit 14 of the information processing device 1 determines that a timeout has occurred (step S 105).
- a reply packet corresponding to a waiting time of 6 minutes is not received by the reply packet receiver 12 (step S301), and one or more reply packets received by the reply packet receiver 12 have been received so far. Because of the reception (step S303), the waiting time corresponding to the unsuccessful received reply packet “6 minutes” and the waiting time corresponding to the reply packet received by the reply packet receiving unit 12 up to that time. The central waiting time “5 minutes” with the longest waiting time “4 minutes” is set as the waiting time (steps S304 and S107). Then, in the same manner as described above, the request packet having the waiting time information indicating the waiting time “5 minutes” is transmitted again to the server device 3 via the port P2 of the communication processing device 2 ( Step S 10 2). Then, a reply packet is transmitted from the server device 3 five minutes after the server device 3 receives the request packet.
- the reply packet is address-converted in the communication processing device 2 and transmitted to the information processing device 1.
- the reply packet is received by the reply packet receiver 12 (step S103), and the waiting time “5 minutes” indicated by the wait time information included in the reply packet is transmitted to the port maintenance time detector 13 and the request packet transmission. Passed to the control unit 14.
- the port keeping time detection unit 13 stores the received waiting time “5 minutes” in a storage unit (not shown) (step S 104).
- the request packet transmission control unit 14 determines that it is time to detect the port maintenance time (step S106). Then, the port maintenance time detector 13 detects the longest waiting time “5 minutes” among the waiting times received from the reply packet receiver 12 so far as the port maintenance time of the communication processing device 2. (Step S108).
- the binary search method is used.
- the port maintenance time can be detected by controlling the transmission of the request packet, and the efficient port maintenance time can be detected.
- the port maintenance time of the communication processing device 2 is 5 minutes and 30 seconds, as described with reference to FIG. If the time until the request packet is transmitted is ignored, the port maintenance time is 5 minutes, which can be detected 17 minutes after the first request packet is transmitted. In this case, the error of port maintenance time is 1 minute. The difference between the waiting time corresponding to the last transmitted request packet and the waiting time corresponding to the request packet transmitted one time before that is one minute. On the other hand, when the request packet is transmitted while increasing the waiting time sequentially from 2 minutes to 1 minute, and the reply packet transmitted corresponding to the request packet cannot be received, the port maintenance time is detected.
- the waiting time is 2 minutes, 3 minutes, 4 minutes, 5 minutes, and 5/6 packets, and it takes 20 minutes to detect the port maintenance time.
- the error of the port maintenance time is also 1 minute. This is because the waiting time is increased every minute.
- the port maintenance time can be detected with necessary and sufficient accuracy. For example, if you want to detect the exact port maintenance time, set the number of request packets to be sent before detecting the port maintenance time to a large value, and if it is sufficient to detect the approximate port maintenance time, The number of request packets sent before detecting the port maintenance time may be reduced.
- the configuration described in the request packet includes only the waiting time.
- the request packet is identified as the waiting time.
- the reply packet transmitted in response to the request packet may include the identification information included in the request packet, as shown in FIG. 4D.
- the information processing device 1 that has received the reply packet preliminarily holds information indicating the correspondence between the waiting time information and the identification information (information processing device 1 or a device accessible by the information processing device 1).
- the waiting time corresponding to the reply packet can be known.
- the port maintenance time is detected in consideration of the transmission time of the request packet and the reply packet.
- FIG. 11 is a block diagram showing a configuration of the information processing system according to the second embodiment.
- the information processing system includes an information processing device 5, a communication processing device 2, and a server device 3.
- the communication processing device 2 and the server device 3 are the same as those described in the first embodiment, and a description thereof is omitted.
- the information processing device 5 corresponds to the information processing device 1 in the first embodiment, but in the second embodiment, the information processing device 5 maintains the port in consideration of the transmission time of the request packet and the reply packet. Perform time detection.
- the information processing device 5 includes a request packet transmission unit 11, a reply packet reception unit 12, a request packet transmission control unit 14, a port maintenance time detection unit 51, and a packet round trip time measurement unit 52. .
- the configuration and operation related to the request packet transmission unit 11, the reply packet reception unit 12, and the request packet transmission control unit 14 are performed except that the port maintenance time is detected in consideration of the transmission time of the request packet and the reply packet. This is the same as that in Form 1, and the description thereof is omitted.
- the port keeping time detection unit 51 detects the port keeping time based on the round trip time of the packet between the information processing device 5 and the server device 3.
- the other processing is the same as that of the port maintenance time detection unit 13 according to Embodiment 1, and the description thereof is omitted.
- the packet round-trip time measuring unit 52 causes the request packet transmitting unit 11 to transmit a request packet for requesting immediate transmission of a reply packet, and from the transmission of the request packet, a reply transmitted according to the request packet. Measures the packet round-trip time, which is the time until the packet is received by the packet return packet receiver 12. The packet round trip time measured by the packet round trip time measuring unit 52 is used in detecting the port maintenance time as described above.
- the packet round trip time measurement unit 52 measures the packet round trip time.
- the request packet transmitter 11 is controlled to transmit the request packet.
- the request packet transmission unit 11 transmits a request packet in accordance with the control by the packet round trip time measurement unit 52.
- the request packet for measuring the packet round-trip time is a request packet for requesting immediate transmission of a reply packet, for example, a request packet having waiting time information indicating a waiting time “0 seconds”. .
- the packet round trip time measurement unit 52 starts measuring the packet round trip time after the request packet is transmitted.
- Step S502 The reply packet receiving unit 12 determines whether or not it has received the reply packet transmitted from the server device 3 in response to the request bucket transmitted in step S501. If received, the packet round-trip time measuring unit 52 is notified of the reception, and the process proceeds to step S503. If not, the process of step S502 is repeated until received.
- Step S503 When the packet round-trip time measuring unit 52 receives the reply packet in step S502, the packet round-trip time measuring unit 52 stops the time measurement started in step S501, and the time measurement value at that time (ie, transmission of the request packet) The time from when the reply packet is received to the packet round-trip time.
- Step S 504 The information processing apparatus 5 detects the port maintenance time using the packet round trip time measured by the packet round trip time measuring unit 52.
- This port maintenance time detection process is the same as that of the first embodiment except that the port maintenance time detection process (step S108) by the port maintenance time detection unit 51 is performed except that the port maintenance time is detected in consideration of the packet round trip time. 2 is the same as the process of the flowchart shown in FIG.
- the power described in the case of measuring the packet round trip time before the processing of the port maintenance time detection (step S504).
- the measurement of the packet return time is shown in FIG. If it is performed before the process of step S108 in the flowchart, the timing of the measurement is not limited.
- the packet round-trip time may be measured after transmission of a request packet having waiting time information indicating a waiting time other than “0 seconds”.
- the packet round-trip time measuring unit 52 gives an instruction to the request packet transmitting unit 11 so as to transmit a request packet having waiting time information indicating a waiting time of “0 seconds” to the server device 3. Then, the request packet transmitter 11 transmits a request packet having the instructed waiting time information to the server device 3 via the communication processing device 2 (step S501). The packet round-trip time measuring unit 52 starts a timer at the timing when the request packet is transmitted, and starts timing.
- the transmitted request packet is transmitted to server apparatus 3 in the same manner as described in the specific example of the first embodiment, and is received by request packet receiving unit 31 (step S201).
- the reply packet transmission control unit 33 determines that an immediate reply is made because the waiting time corresponding to the received request packet is “0 seconds” (steps S202 and S203).
- An instruction to send a reply packet is sent to the communication processing device 2 that is the transmission source of the request packet.
- the reply packet transmitting unit 32 transmits a reply packet having wait time information indicating the wait time “0 seconds” to the payload to the communication processing device 2 (step S204).
- the reply packet is address-converted in the communication processing device 2 and transmitted to the information processing device 5.
- the reply packet receiving unit 12 receives the reply packet (step S502), and passes to the packet round trip time measuring unit 52 that the reply packet has been received.
- the packet round trip time measuring unit 52 stops the timer that was started when the request packet was transmitted, and sets the value of the timer as the packet round trip time (step S503).
- the packet round-trip time is measured as “1 second”.
- the packet round trip time measurement unit 52 passes the measured packet round trip time “1 second” to the port maintenance time detection unit 51.
- FIG. 13 is a diagram for explaining transmission of a request packet and reception (or non-reception) of a reply packet in this specific example.
- the waiting time corresponding to the waiting time information included in the request packet transmitted by the request packet transmission unit 11 starts from the waiting time of 2 minutes, and the request packet.
- the difference from the waiting time according to the waiting time information contained in the request packet sent one before is less than 1 second, the sending of the request packet is terminated and Root maintenance time shall be detected.
- the reply packet receiving unit 12 receives a reply packet corresponding to the request packet.
- the reply packet receiving unit 12 After that, after sending a request packet corresponding to a waiting time of 1 minute 18 seconds, when a reply packet corresponding to the request packet is not received and timed out, it is time to detect the port maintenance time Judgment is made and the port maintenance time is detected.
- the port maintenance time detector 51 sets the packet round trip time "1 second” to the longest waiting time "1 minute 17 seconds” among the waiting time corresponding to the reply packet received by the reply packet receiver 12. The added “1 minute 18 seconds” is detected as the port maintenance time of the communication processing device 2 (step S108).
- FIG. 14 is a diagram illustrating the time from the transmission of the request packet to the reception of the return packet.
- the time from the transmission of the request packet by the information processing device 5 until the request packet passes through the communication processing device 2 and the reply packet after the return packet passes through the communication processing device 2.
- the time until the packet is received by the information processing device 5 is assumed to be negligible! /, Small! /.
- the time from when the request packet is transmitted and passing through the communication processing device 2 to when the request packet is received by the server device 3 is defined as “time A”.
- time A the time from when the request packet is transmitted when the waiting time corresponding to the request packet has elapsed since the server apparatus 3 received the request packet.
- the server apparatus 3 waits for the reply packet to be transmitted after the request packet is received. It will be time.
- time B the time from when the reply packet is transmitted until the reply packet passes through the communication processing device 2 and is received by the information processing device 5 is defined as “time B”.
- the port P2 of the communication processing device 2 is maintained for the period of “waiting time + time A + time B”.
- the sum of time A and time B is the packet round trip time.
- the port maintenance time is the sum of the longest waiting time and the packet round-trip time.
- the round-trip time of the packet between the communication processing device 2 and the server device 3 (actually measured is the information processing
- the port maintenance time can be detected in consideration of the round trip time of the packet between the device 5 and the server device 3), so that a stricter port maintenance time can be detected.
- the port maintenance time may be detected based on the time. That is, the packet round trip time should be used in any process of detecting the port maintenance time.
- the waiting time information included in the request packet to be transmitted can be changed using the packet round trip time.
- the return packet transmission timing may be changed using the packet round-trip time.
- waiting time information indicating a waiting time of 29 seconds obtained by subtracting the packet round-trip time (1 second) from the waiting time. If a request packet is sent and a reply packet sent in response to the request packet is received, the port maintenance time is detected assuming that the wait time corresponding to the reply packet is 30 seconds. You may go.
- time information indicating the time at which the reply packet is transmitted is included in the request packet. May be included.
- a request packet having time information indicating a time elapsed by a predetermined waiting time from the time when the request packet is transmitted is transmitted to the server device, and the time information included in the request packet is associated with the request packet.
- the port maintenance time can be detected.
- the reply packet received by the reply packet receiving unit is transmitted and the corresponding request packet is transmitted until the reply packet is received.
- the longest time is detected as the port maintenance time.
- the request packet transmission control unit 14 controls the transmission of the request packet by the request packet transmission unit 11 using the binary search method based on whether or not the reply packet reception unit 12 has received the reply packet.
- the port maintenance time detectors 13 and 51 may detect the port maintenance time of the communication processing device 2 based on the reply packet received by the reply packet receiver 12. Further, the reply packet transmission control unit 33 may control transmission of the reply packet based on the request packet received by the request packet receiving unit 31.
- a power request bucket that describes the case where the request packet is transmitted using only one port P2 of the communication processing device 2.
- the port of the communication processing device 2 through which the request packet passes may be changed.
- sending a request packet through one port of the communication processing device 2 means that only one port of the communication processing device 2 is used at a time.
- all the request packets may be transmitted through a single port of the communication processing device 2, or a plurality of request packets may be transmitted.
- the packet may be transmitted via two or more ports of the communication processing device 2. However, even in the latter case, only one port is used at a time, so two or more request packets are not sent simultaneously using two or more ports.
- the explanation is given for the case where the request packet and the reply packet are UDP packets.
- the request packet and the reply packet may be TCP packets, and the port maintenance time is detected. Any other packet may be used as long as it is possible.
- the transmission timing of the reply packet is determined using a timer.
- a timer for example, a clock or a clock signal or the like may be used.
- the payload of the reply bucket may not include meaningful information (that is, it may be a dummy packet). For example, if a dummy reply packet can be received when the corresponding waiting time has elapsed since the request packet transmitter 11 sent the request packet, it is determined that the reply packet has been received, If the reply packet cannot be received, it may be determined that the reply packet cannot be received.
- the waiting time is included in the request packet transmitted to the information processing device power server device. Is included, and information indicating whether to increase or decrease the reply packet transmission interval is included. Based on this information, the server device determines the reply packet transmission timing, and returns the reply packet. May be sent. Specifically, figure
- the first request packet includes information indicating that detection of the port maintenance time is started.
- the server apparatus returns a response two minutes after receiving the request packet. Send the packet.
- a request packet including information for reducing the reply packet transmission interval is transmitted to the server apparatus.
- a reply packet is sent one minute after receiving the request packet.
- the request packet transmission control unit 14 does not receive a reply packet corresponding to the transmitted request packet by the reply packet receiving unit 12, and responds so far.
- the waiting time corresponding to the unsuccessful received reply packet (referred to as the "first waiting time") and the reply packets up to that time Waiting for the longest waiting time (referred to as “second waiting time”) among the waiting times corresponding to the reply packets received by the receiving unit 12
- the request packet transmitter 11 may be controlled so as to transmit a request packet having waiting time information according to time.
- the request packet transmission control unit 14 confirms that, for example, a reply packet corresponding to the transmitted request packet is received by the reply packet receiving unit 12, and no reply packet is received by the reply packet receiving unit 12 until then. If there is a waiting time corresponding to the received reply packet and the waiting time corresponding to the reply packet that has not been received by the reply packet receiving unit 12 until that time, The request packet transmitter 11 may be controlled so as to transmit a request packet having waiting time information corresponding to the waiting time between.
- the waiting time between the first waiting time and the second waiting time is, for example, 3 in the time obtained by subtracting the second waiting time from the first waiting time. For example, the time multiplied by 2 minutes.
- the setting of the waiting time using the binary search method means that the waiting time corresponding to the reply packet received by the information processing device 1 and the information processing device 1
- the waiting time between the waiting time corresponding to the powerful reply packet that cannot be received may be set as the waiting time of the next request packet to be transmitted. That is, the request packet transmission control unit 14 receives, for example, the reply packet received by the reply packet receiving unit 12 until the reply packet corresponding to the transmitted request packet is not received by the reply packet receiving unit 12. If there is a strong response, send a request packet with wait time information corresponding to a wait time smaller than the wait time (referred to as “third wait time”) corresponding to the received strong reply packet. Alternatively, the request packet transmitter 11 may be controlled.
- the waiting time smaller than the third waiting time is a time that is larger than 0 and smaller than the third waiting time, such as a time obtained by multiplying the third waiting time by two thirds. is there.
- the communication line 4 is connected via only one communication processing apparatus.
- the communication line 4 may be connected via a plurality of communication processing apparatuses.
- Good that is, a multi-stage communication processing apparatus may be configured.
- the shortest port maintenance time is detected among the multistage communication processing devices.
- the communication processing device 2 has a NAT function ( In other words, the communication processing device 2 may have a packet filtering firewall function instead of the NAT function or together with the NAT function.
- packet filtering refers to selection of received packets based on the above-described reception filter rules, for example.
- the communication processing device 2 having such a firewall function can detect the port maintenance time by the method according to each of the above embodiments.
- the port maintenance time when the communication processing device 2 has a firewall function is the WAN side after the predetermined time has passed since the last packet passed through a port of the communication processing device 2. This is a predetermined time in a case where a packet transmitted to the port is not transmitted to the LAN side of the communication processing device 2.
- the server device may be specified by a domain name (eg, server, pana.net, etc.).
- the server name can be specified by converting the domain name into an IP address using a DNS server.
- each process may be realized by centralized processing by a single device (system), or may be distributedly processed by a plurality of devices. It will be realized by.
- each component may be configured by dedicated hardware, or a component that can be realized by software may be realized by executing a program.
- each component can be realized by a program execution unit such as a CPU reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.
- the software that realizes the information processing apparatus in each of the above embodiments is the following program.
- this program is stored in the computer as an information processing device, a server device, and an information processing device.
- a program for executing processing in an information processing apparatus that constitutes an information processing system including a communication processing device that performs processing related to communication between the processing device and the server device.
- a request packet transmission step for transmitting a request packet, which is a packet requesting transmission of a reply packet transmitted to the information processing apparatus, through one port of the communication processing apparatus, and the server apparatus power is also transmitted through the port.
- a reply packet receiving step for receiving the received reply packet and a port maintaining time detecting step for detecting the port maintaining time of the communication processing device based on the reply packet received by the reply packet receiving unit.
- the packet transmission step is divided into two based on whether or not a reply packet is received in the reply packet reception step. It is intended to send the request packets by using the search method.
- the reply packet received in response to the request packet is received.
- a packet round trip time measuring step for measuring a packet round trip time which is a time until reception in the step may be further executed, and the port maintenance time may be detected based on the packet round trip time.
- the software that implements the server device in each of the above embodiments is a program as described below. That is, this program is an information processing system that constitutes an information processing system that includes an information processing device, a server device, and a communication processing device that performs processing related to communication between the information processing device and the server device.
- a request packet is transmitted. Based on the request packet reception step for receiving the request packet transmitted via the communication processing device and the request packet received in the request packet reception step! / And a reply packet transmission step for transmitting a reply packet.
- the transmission step for transmitting information and the reception step for receiving information are performed by hardware, for example, a modem or an interface card in the transmission step. Processing (only done with no software) Rena, processing) is not included! /.
- This program is recorded on a predetermined recording medium (for example, an optical disk such as a CD-ROM, a magnetic disk, a semiconductor memory, etc.) that can be executed by being downloaded by force such as a server.
- the program may be executed by being read.
- the computer that executes this program may be singular or plural. That is, centralized processing or distributed processing may be performed.
- the information processing system or the like can detect the port maintenance time of the communication processing device, and includes the information processing device that transmits the packet to the server device or the like via the communication processing device. It is useful as a processing system.
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Abstract
Description
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US11/573,127 US20080056276A1 (en) | 2004-08-03 | 2005-08-01 | Information Processing System, Information Processing Apparatus, Server Apparatus, Information Processing Method and Program |
EP20050767117 EP1783974A1 (en) | 2004-08-03 | 2005-08-01 | Information processing system, information processing apparatus, server apparatus, information processing method and program |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006238108A (ja) * | 2005-02-25 | 2006-09-07 | Matsushita Electric Ind Co Ltd | 情報処理システム、情報処理装置、サーバ装置、及び情報処理方法 |
JP2006238107A (ja) * | 2005-02-25 | 2006-09-07 | Matsushita Electric Ind Co Ltd | 情報処理システム、情報処理装置、サーバ装置、及び情報処理方法 |
JP2007281905A (ja) * | 2006-04-07 | 2007-10-25 | Nec Engineering Ltd | Nat管理システム |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011141993A1 (ja) * | 2010-05-11 | 2011-11-17 | 株式会社チェプロ | 双方向通信システムおよびこれに用いるサーバ装置 |
CN102148724B (zh) * | 2011-01-31 | 2014-12-31 | 中兴通讯股份有限公司 | 链路检测方法及网络接入设备 |
CN103024097B (zh) * | 2012-12-24 | 2016-06-29 | 瑞斯康达科技发展股份有限公司 | 探测网络地址转换服务器老化时间的方法、装置及系统 |
KR101612830B1 (ko) * | 2014-12-11 | 2016-04-26 | 현대자동차주식회사 | 효율적인 기기 검색을 수행하는 차량의 멀티미디어 시스템 및 그 제어 방법 |
JP7371609B2 (ja) * | 2020-11-17 | 2023-10-31 | トヨタ自動車株式会社 | 情報処理装置、情報処理方法、情報処理プログラム、及び情報処理システム |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002354048A (ja) * | 2001-05-29 | 2002-12-06 | Matsushita Electric Ind Co Ltd | ルータ装置 |
JP2004166031A (ja) * | 2002-11-14 | 2004-06-10 | Nippon Telegr & Teleph Corp <Ntt> | アドレス組の生存時間取得・計算を可能としたalg装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5355516A (en) * | 1990-09-28 | 1994-10-11 | Motorola, Inc. | Method for reducing superfluous channel allocation in a cellular radiotelephone communication system |
US6075787A (en) * | 1997-05-08 | 2000-06-13 | Lucent Technologies Inc. | Method and apparatus for messaging, signaling, and establishing a data link utilizing multiple modes over a multiple access broadband communications network |
US6760775B1 (en) * | 1999-03-05 | 2004-07-06 | At&T Corp. | System, method and apparatus for network service load and reliability management |
US7512069B2 (en) * | 2000-05-18 | 2009-03-31 | Exfo Service Assurance, Inc. | IP packet identification method and system for TCP connection and UDP stream |
US7149769B2 (en) * | 2002-03-26 | 2006-12-12 | Hewlett-Packard Development Company, L.P. | System and method for multi-destination merge in a storage area network |
US7356045B2 (en) * | 2002-10-22 | 2008-04-08 | Cisco Technology, Inc. | Shared port address translation on a router behaving as NAT & NAT-PT gateway |
-
2004
- 2004-08-03 JP JP2004226478A patent/JP2006050125A/ja not_active Withdrawn
-
2005
- 2005-08-01 CN CNA2005800266108A patent/CN1993949A/zh active Pending
- 2005-08-01 US US11/573,127 patent/US20080056276A1/en not_active Abandoned
- 2005-08-01 WO PCT/JP2005/014020 patent/WO2006013811A1/ja active Application Filing
- 2005-08-01 EP EP20050767117 patent/EP1783974A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002354048A (ja) * | 2001-05-29 | 2002-12-06 | Matsushita Electric Ind Co Ltd | ルータ装置 |
JP2004166031A (ja) * | 2002-11-14 | 2004-06-10 | Nippon Telegr & Teleph Corp <Ntt> | アドレス組の生存時間取得・計算を可能としたalg装置 |
Non-Patent Citations (1)
Title |
---|
"NAT na Kankyo de Hochi Shita SSH Setsuzoku ga Setsudan Sareru Mondai ni Tsuite", 30 November 2003 (2003-11-30), XP003006409, Retrieved from the Internet <URL:http://www.geocities.co.jp/AnimeComic/1098/documents/unixmemo/ssh-keepalive.html> [retrieved on 20051019] * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006238108A (ja) * | 2005-02-25 | 2006-09-07 | Matsushita Electric Ind Co Ltd | 情報処理システム、情報処理装置、サーバ装置、及び情報処理方法 |
JP2006238107A (ja) * | 2005-02-25 | 2006-09-07 | Matsushita Electric Ind Co Ltd | 情報処理システム、情報処理装置、サーバ装置、及び情報処理方法 |
US7860926B2 (en) | 2005-02-25 | 2010-12-28 | Panasonic Corporation | Information processing system, information processing apparatus, server apparatus, information processing method, and program |
US7979586B2 (en) | 2005-02-25 | 2011-07-12 | Panasonic Corporation | Information processing system, information processor, server, information processing method and program |
JP2007281905A (ja) * | 2006-04-07 | 2007-10-25 | Nec Engineering Ltd | Nat管理システム |
Also Published As
Publication number | Publication date |
---|---|
EP1783974A1 (en) | 2007-05-09 |
US20080056276A1 (en) | 2008-03-06 |
CN1993949A (zh) | 2007-07-04 |
JP2006050125A (ja) | 2006-02-16 |
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