WO2018003785A1

WO2018003785A1 - Communication device, communication system, communication method, and non-transitory computer-readable medium

Info

Publication number: WO2018003785A1
Application number: PCT/JP2017/023535
Authority: WO
Inventors: 浩平岡崎
Original assignee: 日本電気株式会社
Priority date: 2016-07-01
Filing date: 2017-06-27
Publication date: 2018-01-04

Abstract

The present invention reduces the traffic of a predetermined type of packets in overlapping communication sections even when the communication sections in which the predetermined type of packets are transmitted and received do not have an inclusive relationship. A determination unit (15) refers to a packet information storage unit (16) and determines whether a predetermined type of packet to be transmitted is to be consolidated. A consolidation information generation unit (14) consolidates the predetermined type of packet determined to be consolidated into consolidation information. A packet transmission unit (13) transmits the packet indicating the consolidation information to a communication device (21). A packet generation unit (24), upon reception of the packet indicating the consolidation information by a packet reception unit (23), refers to the packet information storage unit (26) and generates the predetermined type of packet consolidated into the consolidation information. A packet transmission unit (25) transmits the generated predetermined type of packet to the destination thereof.

Description

Communication device, communication system, communication method, and non-transitory computer-readable medium

The present invention relates to a communication apparatus and a communication system, and more particularly to a communication system in which a predetermined type of packet is transmitted and received, and a communication apparatus used in such a communication system.

The present invention also relates to a communication method and a non-transitory computer-readable medium in the communication device.

MPLS-TP (Multi-Protocol Label-Switching-Transport-Profile) is known as a packet transport technology suitable for accommodating line-type traffic and packet-type traffic in an IP (Internet Protocol) communication network. In MPLS-TP, an OAM (operations, “administration,” and “maintenance”) function is defined in order to improve reliability and fault tolerance. The architecture of MPLS-TP is G. It is recommended as 8110, and its OAM function is G.810. 8113 is recommended.

In the OAM function, MEP (Maintenance End Point) is defined at each of two arbitrary points in the network. Various OAM frames are transmitted and received between these MEPs, and a path between two points is monitored. One of the OAM functions is a function for connectivity check (CC: Continuity Check). In the connectivity check, a communication packet in the section is checked by periodically transmitting and receiving a monitoring packet (CCM: Continuity Check Message) between two points set as MEPs to be monitored.

FIG. 16 shows transmission and reception of monitoring packets in the monitoring section. In this example, the node 51 and the node 52 are defined as MEPs, and the communication section between the node 51 and the node 52 is the monitoring section. Although illustration is omitted in FIG. 16, the communication section between the node 51 and the node 52 may include other communication nodes.

The node 51 periodically transmits a monitoring packet (CCM) 53 to the node 52 at predetermined time intervals. For example, the node 51 periodically transmits the monitoring packet 53 at time intervals of 3.3 ms, 10 ms, 100 ms, 1 second, 10 seconds, 1 minute, or 10 minutes. The node 52 receives the monitoring packet 53 transmitted from the node 51. Further, the node 52 periodically transmits the monitoring packet 53 to the node 51 at predetermined time intervals. The node 51 receives the monitoring packet 53 transmitted from the node 52. Thus, the connectivity of the monitoring section can be confirmed by transmitting and receiving monitoring packets between the MEPs.

For example, the node 52 measures the reception interval of the monitoring packet 53 transmitted by the node 51. In the monitoring section between the node 51 and the node 52, when a failure or the like occurs in the network, the monitoring packet 53 transmitted by the node 51 does not reach the node 52. If the node 52 cannot receive the next monitoring packet 53 within a predetermined time from the reception of the immediately preceding monitoring packet 53, for example, 3.5 times the transmission cycle of the monitoring packet 53, the node 52 receives the monitoring packet 53 in the monitoring section. Detect that a failure has occurred.

Here, regarding connectivity monitoring using CCM, Patent Document 1 discloses a communication method for monitoring network connectivity in two monitoring sections. FIG. 17 shows a network configuration and a monitoring section described in Patent Document 1. The network includes six communication nodes (communication devices) 61-66. In FIG. 17, a first monitoring section (inner monitoring section) 67 having a first monitoring level with the communication node 62 and the communication node 65 as MEP, and a second monitoring level with the communication node 61 and the communication node 66 as a MEP. The second monitoring section (outside monitoring section) 68 is set. The inner monitoring section 67 and the outer monitoring section 68 are set in a nested manner, and the outer monitoring section 68 includes the inner monitoring section 67.

The communication node 62 transmits the first monitoring packet 69 of the first monitoring level for monitoring the inner monitoring section 67 to the communication node 65 that is the MEP on the other end side of the inner monitoring section 67. The communication node 61 transmits the second monitoring packet 70 of the second monitoring level for monitoring the outer monitoring section 68 to the communication node 66 that is the MEP on the other end side of the outer monitoring section 68.

When the communication node 62 which is the MEP of the inner monitoring section 67 receives the second monitoring packet 70 for monitoring the outer monitoring section 68, the communication node 62 holds the received second monitoring packet 70. The communication node 62 notifies the content of the held second monitoring packet 70 to the communication node 65 that is the MEP on the other end side of the inner monitoring section 67. The communication node 65 holds the content of the second monitoring packet 70 notified from the communication node 62.

When the communication node 62 newly receives the second monitoring packet 70, the communication node 62 compares the received second monitoring packet 70 with the held second monitoring packet 70. If the two match, the communication node 62 discards the second monitoring packet 70 without transferring it, and generates a first monitoring packet 69 including a transmission request for the second monitoring packet 70. The communication node 62 transmits the generated first monitoring packet 69 toward the communication node 65.

The first monitoring packet 69 transmitted from the communication node 62 is received by the communication node 65 via the

communication nodes

63 and 64. When the communication node 65 receives the first monitoring packet including the transmission request for the second monitoring packet 70, the communication node 65 generates the second monitoring packet 70 based on the contents of the held second monitoring packet 70. The communication node 65 transmits the generated second monitoring packet 70 to the communication node 66 that is the MEP on the other end side of the outer monitoring section 68.

In Patent Literature 1, when the communication node 62 receives the second monitoring packet 70 for monitoring the outer monitoring section 68 including the inner monitoring section 67 in which it is a MEP, the communication node 62 displays the contents as the inner monitoring section. The communication node 65 which is the MEP on the other end side of 67 is notified. When the communication node 62 receives the second monitoring packet 70 having the same content again, the communication node 62 transmits a first monitoring packet 69 including a transmission request for the second monitoring packet 70 to the communication node 65. In this way, even when a plurality of monitoring levels with overlapping monitoring sections are set, it is possible to suppress the monitoring packet having the same content from being repeated twice and more bandwidth is used for service traffic. be able to.

JP 2011-101134 A

Here, when a failure is detected in the monitoring section, a network route is switched, and communication is restored using a route in which no failure has occurred. For example, ITU-T (International Telecommunication Union Telecommunication Standardization Sector) recommendation Y. 1731 requires that the route switching time be within 50 ms. In order to satisfy such a requirement, it is necessary to detect the failure in a short time, and the transmission cycle of the monitoring packet is set to a short cycle such as 3.3 msec.

However, if the transmission period of the monitoring packet is shortened, the traffic of the monitoring packet transmitted / received in the monitoring section increases, and the monitoring packet consumes the network bandwidth. Further, as the number of sections to be monitored increases, the number of monitoring packets transmitted / received in the network also increases. In particular, in the communication section overlapping in a plurality of monitoring sections, the traffic of the monitoring packets imposes user data traffic and the like. Such a problem occurs not only when sending and receiving monitoring packets, but also when sending and receiving predetermined types of packets between arbitrary communication nodes.

For example, if all of the communication sections are configured with sections that perform optical communication capable of high-speed communication, even if monitoring packets (predetermined types of packets) are transmitted in a short cycle, there is room in the network bandwidth. Therefore, the traffic of monitoring packets is not considered to be a big problem. However, when the monitoring section includes a section having a slower communication speed than other sections such as a wireless communication section, it is considered that the bandwidth consumed by the monitoring packet traffic in the communication section cannot be ignored.

In Patent Document 1, the first monitoring packet 69 is the only monitoring packet that is transmitted and received in the inner monitoring section 67 included in the outer monitoring section 68. For this reason, it is possible to reduce the monitoring packet traffic in the inner monitoring section 67 as compared with the case where the monitoring packets in both monitoring sections are transmitted and received. However, Patent Document 1 is a method in which a transmission request for the other monitoring packet is included in one of the two monitoring packets, and the number of monitoring packets that can be reduced is only one.

In Patent Document 1, a transmission request for the second monitoring packet 70 is transmitted to the MEP in the inner monitoring section 67 that terminates the first monitoring packet 69. In Patent Document 1, since one of the monitoring sections needs to completely include the other, the method described in Patent Document 1 cannot be applied to any communication section. In other words, the method described in Patent Document 1 cannot be used for the purpose of reducing the traffic of monitoring packets in an arbitrary communication section that overlaps in a plurality of monitoring sections, for example.

In view of the above, the present invention provides a network communication device, a communication system, and a communication method capable of reducing traffic of a packet of a predetermined type in an overlapping communication section even when a communication section in which transmission / reception of the packet of the predetermined type is not included And non-transitory computer readable media.

A communication device according to a first aspect of the present invention includes a communication unit that communicates with another communication device, a packet transmission unit that transmits a packet to the other communication device through the communication unit, and a predetermined for the other communication device. Prior to the transmission of the packet of the type, a determination unit that refers to a packet information storage unit that stores information about the packet to be aggregated, and determines whether the packet of the predetermined type to be transmitted is an aggregation target; Aggregate information generating means for generating aggregate information by aggregating packets of a predetermined type determined to be an aggregation target by the means, and when the packet transmission means is determined to be an aggregation target by the determination means, A packet indicating information is transmitted to the other communication device.

A communication device according to a second aspect of the present invention includes a communication unit that communicates with another communication device, a packet reception unit that receives a packet from the other communication device through the communication unit, and a plurality of communication devices from the other communication device. When a packet indicating aggregate information obtained by aggregating the predetermined type of packet is received, a packet of a predetermined type aggregated in the aggregated information is referred to by referring to a packet information storage unit that stores information on the predetermined type of packet. And a packet transmission means for transmitting a predetermined type of packet generated by the packet generation means to a destination.

A communication method according to a third aspect of the present invention is a communication method in a communication device that performs communication with another communication device, prior to transmission of a predetermined type of packet to the other communication device, Referring to the packet information storage means for storing information related to packets to be aggregated, it is determined whether or not a predetermined type of packet to be transmitted is an aggregation target, and the predetermined type of packet determined as the aggregation target in the above determination is aggregated The aggregated information is generated, and a packet indicating the aggregated information is transmitted to the other communication device.

A communication method according to a fourth aspect of the present invention is a communication method in a communication device that performs communication with another communication device, and a plurality of predetermined types of packets are aggregated from the other communication device. A packet indicating aggregate information is received, a packet information storage unit that stores information of the packet of the predetermined type is referred to, a packet of the predetermined type aggregated in the aggregate information is generated, and the generated packet of the predetermined type is , To send to the destination.

A non-transitory computer-readable medium according to a fifth aspect of the present invention is a program for causing a computer to communicate with another communication device, and for transmitting a predetermined type of packet to the other communication device. Prior to referring to the packet information storage means for storing information related to packets to be aggregated, it is determined whether or not a packet of a predetermined type to be transmitted is an aggregation target. A program for causing the computer to generate aggregate information in which packets are aggregated and to transmit a packet indicating the aggregate information to the other communication device is stored.

A program according to a sixth aspect of the present invention is a program that causes a computer to communicate with another communication device, and includes aggregate information obtained by aggregating a plurality of predetermined types of packets from the other communication device. The packet information storage means for storing the information of the packet of the predetermined type and generating the packet of the predetermined type aggregated in the aggregate information, and the generated packet of the predetermined type, This is for causing the computer to execute transmission toward the destination.

A communication system according to a seventh aspect of the present invention is a communication system including a first communication device and a second communication device, wherein communication means for communicating with the second communication device, and through the communication means Referring to packet transmission means for transmitting packets to the second communication device, and packet information storage means for storing information on packets to be aggregated prior to transmission of a predetermined type of packet to the second communication device; A determination unit that determines whether or not a predetermined type of packet to be transmitted is an aggregation target; and an aggregate information generation unit that generates aggregate information by aggregating the predetermined type of packet determined to be an aggregation target by the determination unit. And the packet transmission unit transmits a packet indicating the aggregation information to the second communication device when the determination unit determines that the packet is an aggregation target. A communication unit that communicates with the first communication device; a packet reception unit that receives a packet from the first communication device through the communication unit; and a plurality of predetermined types of packets from the first communication device. Packet generation means for generating a packet of a predetermined type aggregated in the aggregate information with reference to a packet information storage means for storing information of the packet of the predetermined type when a packet indicating the aggregated information is received And a second communication device having a packet transmission unit that transmits a predetermined type of packet generated by the packet generation unit to a destination.

A communication method according to an eighth aspect of the present invention is a communication method in a communication system including a first communication device and a second communication device, from the first communication device to the second communication device. Prior to the transmission of the predetermined type of packet, the packet information storage means for storing information relating to the aggregation target packet is referred to, and it is determined whether or not the predetermined type of transmission target packet is the aggregation target. Aggregation information obtained by aggregating predetermined types of packets determined to be aggregated is generated, a packet indicating the aggregation information is transmitted from the first communication device to the second communication device, and the first communication device transmits the packet Generate a packet of a predetermined type aggregated in the aggregated information by receiving a packet indicating the aggregated information, referring to a packet information storage unit that stores information of the packet of the predetermined type And the packet of the predetermined type, and transmits toward the destination from the second communication device.

The communication apparatus, the communication system, the communication method, and the non-transitory computer-readable medium of the present invention provide a packet of a predetermined type in an overlapping communication section even when a communication section in which transmission / reception of the packet of a predetermined type is not included Traffic can be reduced.

The block diagram which shows the communication system containing the communication apparatus of this invention. 1 is a block diagram showing a communication system including a communication device according to an embodiment of the present invention. The block diagram which shows a communication apparatus. The functional block diagram which shows an OAM process part. The figure which shows an example of the information which a packet information storage part memorize | stores. The schematic diagram which shows the production | generation of aggregate information and the production | generation of the monitoring packet based on aggregate information. The flowchart which shows the procedure in case a communication apparatus receives the monitoring packet from the wired area side. The sequence diagram which shows the procedure of the registration process of the monitoring information implemented between communication apparatuses. The sequence diagram which shows the procedure of the aggregation process of the monitoring packet implemented between communication apparatuses. The sequence diagram which shows the procedure of the monitoring information deletion process implemented between communication apparatuses. The block diagram which shows the monitoring packet and aggregation information which are transmitted / received between communication apparatuses. The block diagram which shows another example of the setting of a communication system and a monitoring area. The block diagram which shows the communication apparatus which can control the zone | band of the communication area between opposing communication apparatuses. The block diagram which shows the communication apparatus which has three radio signal processing parts. The block diagram which shows a part of communication system containing the communication apparatus shown by FIG. The block diagram which shows transmission / reception of the monitoring packet in a monitoring area. The block diagram which shows the structure of a network and the monitoring area of patent document 1. FIG.

Prior to the description of the embodiments of the present invention, an outline of the present invention will be described. FIG. 1 shows a communication system including the communication apparatus of the present invention. The communication system 10 includes a communication device 11 and a communication device 21. The communication device 11 includes a communication unit 12, a packet transmission unit 13, an aggregate information generation unit 14, and a determination unit 15. The communication device 21 includes a communication unit 22, a packet reception unit 23, a packet generation unit 24, and a packet transmission unit 25.

The communication unit (communication means) 12 of the communication device 11 communicates with the communication device 21. The packet transmission unit (packet transmission unit) 13 transmits a packet to the communication device 21 through the communication unit 12. The packet information storage unit (packet information storage means) 16 stores information related to packets to be aggregated. Prior to transmission of a predetermined type of packet to the communication device 21, the determination unit (determination means) 15 refers to the packet information storage unit 16 to determine whether or not the predetermined type of transmission target packet is an aggregation target. . Note that the packet information storage unit 16 only needs to be referable from the communication device 11, and may be disposed inside the communication device 11 or may be disposed outside the communication device 11.

The aggregation information generation unit (aggregation information generation means) 14 generates aggregation information obtained by aggregating packets of a predetermined type determined to be aggregated by the determination unit 15. When the determination unit 15 determines that a predetermined type of packet to be transmitted is an aggregation target, the packet transmission unit 13 transmits a packet indicating the aggregation information generated by the aggregation information generation unit 14 through the communication unit 12 to the communication device. 21 to send.

The communication unit (communication means) 22 of the communication device 21 communicates with the communication device 11. The packet receiving unit (packet receiving unit) 23 receives a packet from the communication device 11 through the communication unit 22. The packet received by the packet receiver 23 includes a packet indicating aggregate information.

The packet information storage unit (packet information storage means) 26 stores information on a predetermined type of packet. The packet information storage unit 26 only needs to be referable from the communication device 21, and may be disposed inside the communication device 21 or may be disposed outside the communication device 21. The packet generation unit (packet generation unit) 24 refers to the packet information storage unit 26 and generates a predetermined type of packet aggregated in the aggregate information. The packet transmission unit (packet transmission unit) 25 transmits the predetermined types of packets generated by the packet generation unit 24 toward their destinations.

For example, a communication section in which transmission / reception of a packet of a predetermined type is performed includes a section between the communication device 11 and the communication device 21, and communication sections of a plurality of packets of a predetermined type are between the communication device 11 and the communication device 21. Consider a case where there is an overlap in the interval between. In this case, when the communication device 11 transmits a plurality of packets of a predetermined type to the communication device 21, as the number of packets of the predetermined type transmitted increases, a larger number of packets of the predetermined type are transmitted from the communication device 11 to the communication device 21. It is necessary to transmit, and the proportion of traffic of a predetermined type of packet in the network traffic increases.

In the present invention, the communication device 11 aggregates predetermined types of packets to be aggregated into aggregate information and transmits the aggregated information to the communication device 21. When the communication device 21 receives the packet indicating the aggregate information from the communication device 11, the communication device 21 generates a predetermined type of packet aggregated in the aggregate information using the information stored in the packet information storage unit 26, and generates the generated predetermined type of packet. Send the packet to its destination. In the present invention, the aggregate information is transmitted from the communication device 11 to the communication device 21, and a predetermined type of packet is generated in the communication device 21. Therefore, in the section between the communication device 11 and the communication device 21, the predetermined type Packet transmission can be omitted. For this reason, it is possible to reduce the traffic in the section between the communication device 11 and the communication device 21 compared to the case where the aggregate information is not used.

Here, in Patent Document 1, a transmission request for a monitoring packet (second monitoring packet) in the second monitoring section is included in the monitoring packet (first monitoring packet) in the first monitoring section having an inclusion relationship. In the present invention, aggregate information is transmitted from the communication device 11 to the communication device 21, and unlike Patent Document 1 in which a transmission request for the second monitor packet is included in the first monitor packet, a plurality of aggregate information is included in one aggregate information. The predetermined types of packets can be aggregated. Further, in Patent Document 1, the transmission request for the second monitoring packet needs to be transmitted to the MEP in the first monitoring section. On the other hand, in the present invention, there is no particular restriction on the end-to-end communication section in which a predetermined type of packet is transmitted and received, and even if one communication section is not included in the other communication section, the communication sections overlap. In a communication section between the communication device 11 and the communication device 21, it is possible to reduce the traffic of a predetermined type of packet.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a communication system including a communication apparatus according to an embodiment of the present invention. The communication system 100 includes a communication device (device A1) 201, a communication device (device A2) 202, a communication device (device A3) 203, a communication device (device B) 101, a communication device (device C) 102, and a communication device (device D1). ) 301, a communication device (device D2) 302, and a communication device (device D3) 303. The communication system 100 is configured as, for example, an MPLS-TP (Multi-Protocol Label Switching-Transport-Profile) network system.

The communication device B101 and the communication device C102 are configured as devices that perform point-to-point communication, for example. The communication device B101 transmits (transfers) packets received from the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203 to the communication device C102. The communication device C102 transfers the packet received from the communication device B101 to the communication device (D1) 301, the communication device (D2) 302, and the communication device (D3) 303. Further, the communication device C102 transfers the packets received from the communication device (D1) 301, the communication device (D2) 302, and the communication device (D3) 303 to the communication device B101. The communication device B101 transfers the packet received from the communication device C102 to the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203.

In the communication system 100, the communication device (A1) 201, the communication device (A2) 202, the communication section between the communication device (A3) 203 and the communication device B101, the communication device (D1) 301, and the communication device (D2). 302 and the communication section between the communication apparatus (D3) 303 and the communication apparatus C102 are each configured with a section (wired section) in which communication is performed by wire such as optical communication. The communication section between the communication device B101 and the communication device C102 is configured with a section (wireless section) for performing wireless communication, for example. In the wireless section, for example, electromagnetic waves such as millimeter waves and microwaves are used. The communication speed in the wireless section is assumed to be lower than the communication speed in the wired section. Specifically, the wired section is 1 Gbps (bit per second) to 10 Gbps, while the wireless section may be less than 100 Mbps.

In the communication system 100, packets of a predetermined type are periodically transmitted and received between arbitrary communication devices. The predetermined type of packet is a packet transmitted and received between two points set as MEP (Maintenance End Point) in, for example, an OAM (operations, administration, and maintenance) function. Hereinafter, a case where the predetermined type of packet is a monitoring packet that is periodically transmitted and received in the monitoring target section (monitoring section) will be described.

As shown in FIG. 2, in the communication system 100, three monitoring sections 401 to 403 are defined. The monitoring section 401 is a monitoring section in which the communication device (A1) 201 and the communication device (D1) 301 are MEPs. The monitoring section 402 is a monitoring section in which the communication device (A2) 202 and the communication device (D2) 302 are MEPs. The monitoring section 403 is a monitoring section in which the communication device (A3) 203 and the communication device (D3) 303 are MEPs. The monitoring sections 401 to 403 include a communication section between the communication device B101 and the communication device C102.

In the monitoring section 401, a monitoring packet for checking the connectivity of the monitoring section 401, for example, CCM (Continuity Check Message), is periodically transmitted and received between the communication device (A1) 201 and the communication device (D1) 301. The Similarly, for the

monitoring sections

402 and 403, monitoring packets are transmitted between the communication device (A2) 202 and the communication device (D2) 302, and between the communication device (A3) 203 and the communication device (D3) 303, respectively. Are regularly sent and received. In each monitoring section, monitoring packets are periodically transmitted from one MEP to the other MEP and from the other MEP to the one MEP, for example, at time intervals of 3.3 milliseconds.

In this embodiment, instead of transmitting the monitoring packets received from the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203 to the communication device C102, the communication device B101 transmits them to the communication device C102. The aggregated information can be transmitted to the communication device C102. Upon receiving the aggregate information, the communication device C102 generates a monitoring packet aggregated in the aggregate information, and transmits the generated monitoring packet to the destination. In this case, the communication device B101 corresponds to the communication device 11 in FIG. 1, and the communication device C102 corresponds to the communication device 21 in FIG.

Further, the communication device C102 aggregates them instead of transmitting the monitoring packets received from the communication device (D1) 301, the communication device (D2) 302, and the communication device (D3) 303 to the communication device B101. Information can be transmitted to the communication device B101. When the communication device B101 receives the aggregate information, the communication device B101 generates a monitor packet aggregated in the aggregate information, and transmits the generated monitor packet to the destination. In this case, the communication device C102 corresponds to the communication device 11 in FIG. 1, and the communication device B101 corresponds to the communication device 21 in FIG. In the following description, monitoring packets are mainly transmitted from the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203 side to the communication device (D1) 301 and the communication device (D2). 302 and the case of transmission to the communication device (D3) 303 side will be described.

FIG. 3 shows the communication device B101. The communication apparatus B 101 includes input / output ports 111 to 113, a packet transfer unit 114, a wireless signal processing unit 115, an OAM processing unit 116, and a packet information storage unit 117. The communication device C102 has the same configuration as the communication device B101 shown in FIG. The description of each part of the communication device B101 described below can be similarly applied to the communication device C102.

The input / output ports 111 to 113 are network ports for connecting to other communication devices by wired communication. For example, the communication device B 101 communicates with the communication device (A 1) 201 (see FIG. 2) through the input / output port 111, communicates with the communication device (A 2) 202 through the input / output port 112, and communicates through the input / output port 113. It communicates with the device (A3) 203. Although not shown in FIG. 3, the communication apparatus B101 includes elements for performing communication such as a modulator, a demodulator, a transmitter, and a receiver.

The wireless signal processing unit 115 processes a wireless signal in order to perform wireless communication with the facing communication device C102. The radio signal processed by the radio signal processing unit 115 is transmitted to the communication device C102 via an antenna or the like. Although not shown in FIG. 3, the communication apparatus B101 includes elements for performing wireless communication such as a modulator, a demodulator, a transmitter, and a receiver. The wireless signal processing unit 115 corresponds to the

communication units

12 and 22 in FIG.

The packet transfer unit 114 receives packets from other communication devices through the input / output ports 111 to 113 and the wireless signal processing unit 115. Further, the packet transfer unit 114 transmits the packet to other communication devices through the input / output ports 111 to 113 and the wireless signal processing unit 115. The packet transfer unit 114 corresponds to the packet transmission unit 13 and the packet reception unit 23 in FIG.

The packet transfer unit 114 receives packets from the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203 through the input / output ports 111 to 113, for example. The packet transfer unit 114 transfers the packets received through the input / output ports 111 to 113 to the communication device C102 through the wireless signal processing unit 115. Further, the packet transfer unit 114 receives a packet from the communication apparatus C102 through the wireless signal processing unit 115, for example. The packet transfer unit 114 transfers the received packet to the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203 through the input / output ports 111 to 113.

The packet information storage unit 117 stores information related to the monitoring packets to be aggregated. The packet information storage unit 117 stores, for example, information (monitoring information) included in the monitoring packet as information on the monitoring packet to be aggregated. The packet information storage unit 117 includes, for example, a semiconductor storage device, a hard disk device, or an optical disk device. The packet information storage unit 117 corresponds to the packet

information storage units

16 and 26 in FIG.

The OAM processing unit 116 performs OAM processing. The processing performed by the OAM processing unit includes generation of aggregated information that aggregates monitoring packets and generation of monitoring packets based on the aggregated information. The aggregate information generated by the OAM processing unit 116 is transmitted to the communication device C102 through the packet transfer unit 114. The monitoring packet generated by the OAM processing unit 116 is transmitted to the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203 through the packet transfer unit 114. The packet transfer unit 114 also functions as the packet transmission unit 25 in FIG.

FIG. 4 is a functional block diagram showing the OAM processing unit 116. The OAM processing unit 116 includes a determination unit 161, an aggregate information generation unit 162, a packet generation unit 163, an information notification unit (information notification unit) 164, a registration unit (registration unit) 165, a deletion instruction information generation unit (deletion instruction information generation unit). 166 and an information deletion unit (information deletion unit) 167. When the monitoring packet transmitted in the direction toward the communication device C102 is received from another communication device, the packet transfer unit 114 sends the monitoring packet to the OAM processing unit 116. Prior to the transmission of the monitoring packet to the communication device C102, the determination unit 161 refers to the packet information storage unit 117 and determines whether the monitoring packet to be transmitted is an aggregation target.

The packet information storage unit 117 stores, for example, information on the monitoring packet in which the monitoring information is stored in the packet information storage unit 117 of the destination communication device C102 as information on the monitoring packet to be aggregated. When the information on the monitoring packet to be transmitted is stored in the packet information storage unit 117 of the communication device C102, the determining unit 161 determines that the monitoring packet to be transmitted is an aggregation target.

The aggregation information generation unit 162 generates aggregation information obtained by aggregating the monitoring packets determined to be aggregated by the determination unit 161. The aggregate information generation unit 162 includes, for example, information for identifying the monitoring packet determined as an aggregation target by the determination unit 161 in the aggregate information. The aggregate information generation unit 162 can include information for specifying a plurality of monitoring packets in one aggregate information.

For example, an index is assigned to each of the monitoring packets to be aggregated, and the aggregation information generation unit 162 specifies information for specifying the index corresponding to the monitoring packet determined to be the aggregation target for identifying the monitoring packet. Included in the aggregate information as information. For example, the aggregate information includes bits corresponding to the index, and the aggregate information generation unit 162 sets a predetermined value, for example, a bit value “1”, to the bit corresponding to the index of the monitoring packet determined to be aggregated. . The packet transfer unit 114 transmits a packet indicating the aggregate information generated by the aggregate information generation unit 162 to the communication apparatus C102 through the wireless signal processing unit 115 (see FIG. 3). The generation and transmission of the aggregate information is performed similarly in the communication apparatus C102.

The packet transfer unit 114 of the communication device B101 receives the packet indicating the aggregate information transmitted from the communication device C102 through the wireless signal processing unit 115. When receiving the packet indicating the aggregate information, the packet transfer unit 114 sends the aggregate information to the OAM processing unit 116. The packet generation unit 163 refers to the packet information storage unit 117 and generates a monitoring packet aggregated in the aggregate information. For example, the packet generation unit 163 generates a monitoring packet corresponding to each piece of information for specifying a plurality of monitoring packets included in the aggregate information. For example, the packet generation unit 163 generates a monitoring packet to which an index corresponding to a bit for which the bit value “1” is set in the aggregate information is assigned. The packet transfer unit 114 transmits the generated monitoring packets to the respective destinations through the input / output ports 111 to 113 (see FIG. 3). The generation and transmission of the monitoring packet based on the aggregated information is performed similarly in the communication device C102.

Note that, when the determination unit 161 of the communication device B101 determines that the monitoring packet is not an aggregation target, the packet transfer unit 114 transmits the monitoring packet to the communication device C102 through the wireless signal processing unit 115. Similarly, when the communication device C102 determines that the monitoring packet is not an aggregation target, the packet transfer unit 114 of the communication device C102 transmits the monitoring packet to the communication device B101 through the wireless signal processing unit 115.

When receiving the monitoring packet from the communication device C102, the packet transfer unit 114 of the communication device B101 sends the received monitoring packet (its contents) to the OAM processing unit 116. When the monitoring packet is received from the communication device C102, the registration unit 165 registers information regarding the received monitoring packet in the packet information storage unit 117. For example, the registration unit 165 acquires monitoring information from a monitoring packet according to a predetermined format, and registers the acquired monitoring information in the packet information storage unit 117.

Specifically, the registration unit 165 acquires, as monitoring information, for example, MEG ID (Maintenance Entity Group Identifier), MEP ID, MEL (Maintenance Entity Level), CCM cycle, transfer destination port and label from the monitoring packet. For example, the registration unit 165 assigns an index to the monitoring packet, and registers the assigned index and the monitoring information in association with each other in the packet information storage unit 117. The registration of the monitoring information is similarly performed in the communication device C102.

The information notification unit 164 of the communication device B101 transmits a packet indicating information on the monitoring packet registered by the registration unit 165 to the communication device C102 through the packet transfer unit 114. For example, the information notification unit 164 transmits (notifies) the monitoring information acquired from the monitoring packet and the index assigned to the monitoring packet to the communication device C102. The transmission of the information related to the registered monitoring packet is similarly performed in the communication apparatus C102.

When the packet transfer unit 114 of the communication device B101 receives a packet indicating information related to the monitoring packet registered from the communication device C102, the packet transfer unit 114 sends the information to the OAM processing unit 116. The registration unit 165 registers information on the registered monitoring packet notified from the communication device C102 in the packet information storage unit 117. Registration of information in the packet information storage unit 117 based on the notified information is similarly performed in the communication apparatus C102.

The deletion instruction information generation unit 166 generates deletion instruction information for instructing deletion of information related to the monitoring packet when the monitoring packet to be aggregated does not occur for a predetermined time or longer. For example, if a certain monitoring packet whose monitoring information is stored in the packet information storage unit 117 is not received even after a predetermined time has elapsed since the previous reception time, the deletion instruction information generation unit 166 displays the monitoring information of the monitoring packet. Deletion instruction information including an instruction to delete from the packet information storage unit 117 is generated. The predetermined time is set to a time sufficiently longer than the transmission period of the monitoring packet, for example, a time of about 10 minutes to 1 hour. The packet transfer unit 114 transmits a packet indicating the deletion instruction information generated by the deletion instruction information generation unit 166 to the communication apparatus C102. The generation and transmission of the deletion instruction information is similarly performed in the communication apparatus C102.

When the packet transfer unit 114 of the communication device B101 receives the packet indicating the deletion instruction information from the communication device C102, the packet transfer unit 114 sends the deletion instruction information to the OAM processing unit 116. When the deletion instruction information is received, the information deletion unit 167 deletes information regarding the monitoring packet instructed from the packet information storage unit 117 according to the deletion instruction information. Deletion of information related to the monitoring packet based on the deletion instruction information is similarly performed in the communication apparatus C102. Note that the information deletion unit 167 of the communication device that transmits the deletion instruction information may delete the monitoring information from the packet information storage unit 117 after a predetermined time from the previous reception.

FIG. 5 shows an example of information stored in the packet information storage unit 117. In this example, the packet information storage unit 117 stores an MEG ID, a CCM cycle, a transmission source MEP ID, and a transmission destination MEP ID in association with an index (index number). As described above, when receiving the monitoring packet from the opposite communication device, the registration unit 165 acquires the monitoring information from the monitoring packet and registers the monitoring information in the packet information storage unit 117. Further, when the registration unit 165 receives a notification of registered monitoring information from the opposite communication device, the registration unit 165 registers the monitoring information included in the notification in the packet information storage unit 117.

When a monitoring packet is received through the input / output ports 111 to 113 (see FIG. 3), the determining unit 161 (see FIG. 4) refers to the packet information storage unit 117 and monitors the received monitoring packet. It is determined whether the value of each item of information matches the value of each item stored in the packet information storage unit 117. The determination unit determines that the monitoring packet is an aggregation target when the values of the items match, and determines that the monitoring packet is not an aggregation target when the values do not match.

On the other hand, when the aggregate information is received through the wireless signal processing unit 115, the packet generation unit 163 acquires the monitoring information from the packet information storage unit 117, and generates a monitoring packet according to a predetermined format based on the acquired monitoring information. . For example, when the monitoring packet with the index number “1” is aggregated in the aggregation information, the packet generation unit 163, the MEG ID “XXX”, the CCM cycle “3.3 ms”, the source MEP ID “100”, and A monitoring packet having the MEP ID “110” of the transmission destination as each field value is generated.

Note that in the communication device that generates the aggregate information, the information stored in the packet information storage unit 117 is used to determine whether or not the monitoring packet is an aggregation target. For this reason, the packet information storage unit 117 of the communication device that generates the aggregated information only needs to store information necessary for specifying individual monitoring packets. It is not necessary to store the information. In other words, the packet information storage unit 117 of the communication device that generates aggregate information and the packet information storage unit 117 of the communication device that generates monitoring packets based on the aggregate information do not necessarily have the same information. There is no need to remember.

FIG. 6 shows generation of aggregate information and generation of a monitoring packet based on the aggregate information. For example, the aggregate information generation unit 162 aggregates a plurality of monitor packets including the monitor packets 501 to 503 into a packet 510 (hereinafter also referred to as an aggregate packet) indicating aggregate information. Aggregated packet 510 includes a header and aggregate information. Each bit of the aggregate information corresponds to the index number of the monitoring packet. The bit value of the aggregation information indicates whether monitoring packets are aggregated. For example, the bit value “1” represents that the monitoring packets having the index number corresponding to the bit are aggregated, and the bit value “0” represents that the monitoring packets having the index number corresponding to the bit are not aggregated. . The roles of the bit values “0” and “1” may be reversed.

In the example of FIG. 6, the most significant bit of the aggregate information corresponds to the monitoring packet 501 with the index number “1”, the second bit corresponds to the monitoring packet 502 with the index number “2”, and the third bit. Corresponds to the monitoring packet 503 having the index number “3”. For example, when receiving the monitoring packet 501, the aggregate information generation unit 162 sets “1” to the most significant bit of the aggregate information. The aggregate information generation unit 162 waits for arrival of another monitoring packet for a predetermined waiting time. The standby time is shorter than the monitoring packet transmission cycle. When the monitoring packet 503 is received during the standby time, the aggregate information generation unit 162 sets “1” to the third bit. When the monitoring packet 502 is not received, “0” is set in the second bit.

The aggregate packet 510 is transmitted from the communication apparatus B101 to the communication apparatus C102, for example. The packet generation unit 163 of the communication device C102 that has received the aggregated packet generates a monitoring packet aggregated into the aggregated packet 510 based on the bit value of the aggregated information. In the example of FIG. 6, since the value of the most significant bit and the value of the third bit of the aggregate information are “1”, the packet generation unit 163 generates the monitoring packet 501 and the monitoring packet 503. Since the value of the second bit of the aggregate information is “0”, the packet generation unit 163 does not generate the monitoring packet 502. By doing in this way, the same monitoring packet as the monitoring packet received by the communication apparatus that transmitted the aggregate information can be generated in the communication apparatus that has received the aggregate information.

For example, consider aggregating about 1000 monitoring packets in aggregate information. In this case, if each bit of the aggregate information is associated with each monitoring packet, the size of the aggregate packet 510 is about 150 bytes including the header. The size of each monitoring packet is assumed to be 100 bytes including the header. When 1000 monitoring packets are transmitted individually, the amount of communication between communication devices is 100 × 1000 bytes. When 1000 monitoring packets are aggregated into the aggregate packet 510, the communication amount between the communication devices is only 150 bytes, so the communication amount can be significantly reduced.

Next, the operation procedure will be described. FIG. 7 shows a procedure when the communication apparatus B101 receives a monitoring packet from the wired section side. The packet transfer unit 114 of the communication device B101 receives the monitoring packet from the communication device (A1) 201, the communication device (A2) 202, or the communication device (A3) 203 through the input / output ports 111 to 113 (step A1). In step A1, the packet transfer unit 114 receives a monitoring packet whose destination is the communication device (D1) 301, the communication device (D2) 302, or the communication device (D3) 303.

The packet transfer unit 114 sends the received monitoring packet to the OAM processing unit 116. The determination unit 161 (see FIG. 4) of the OAM processing unit 116 refers to the packet information storage unit 117 and determines whether or not the monitoring packet received in step A1 is a monitoring packet to be aggregated (step A2). ). In step A2, the determination unit 161 acquires monitoring information from the monitoring packet received in step A1. The determination unit 161 checks whether the same monitoring information as the acquired monitoring information is stored in the packet information storage unit 117.

The determination unit 161 acquires, for example, the MEG ID “XXX”, the CCM cycle “3.3 ms”, the source MEP ID “100”, and the destination MEP ID “110” from the monitoring packet. When the packet information storage unit 117 stores the information illustrated in FIG. 5, the determination unit 161 determines that the acquired monitoring information matches the monitoring information with the index number “1”. In this case, the determination unit 161 determines in step A2 that the monitoring packet is an aggregation target. When the same monitoring information as the acquired monitoring information is not stored in the packet information storage unit 117, the determining unit 161 determines that it is not an aggregation target.

If the determination unit 161 determines that it is not an aggregation target in Step A2, the determination unit 161 transmits a monitoring packet to the communication device C102 through the packet transfer unit 114, and performs monitoring information registration processing between the communication device B101 and the communication device C102. Start (step A3). If the determination unit 161 determines that it is an aggregation target in Step A3, the determination unit 161 instructs the aggregation information generation unit 162 to generate the aggregation information, and starts the aggregation process between the communication device B101 and the communication device C102 (Step S3). A4).

FIG. 8 shows the procedure of the monitoring information registration process performed between the communication device B101 and the communication device C102. When it is determined in step A2 in FIG. 7 that the monitoring packet is not an aggregation target, the packet transfer unit 114 of the communication device B101 transmits the monitoring packet received in step A1 to the communication device C102 through the wireless signal processing unit 115. (Step B1). The packet transfer unit 114 of the communication device C102 receives the monitoring packet through the wireless signal processing unit 115 (step B2). The packet transfer unit 114 sends the received monitoring packet to the OAM processing unit 116.

In the communication device C102, the registration unit 165 of the OAM processing unit 116 acquires monitoring information from the monitoring packet received in step B2 (step B3). The registration unit 165 acquires the MEG ID, the CCM cycle, the transmission source MEP ID, and the transmission destination MEP ID, for example, from a monitoring packet according to a predetermined format. The registration unit 165 registers the acquired monitoring information in the packet information storage unit 117 (step B4). In step B4, for example, the registration unit 165 assigns an index number to the monitoring packet received in step B2, and registers the acquired monitoring information in the packet information storage unit 117 in association with the assigned index number.

The packet transfer unit 114 transfers the monitoring packet received in step B2 toward the destination (step B5). In step B5, the packet transfer unit 114 transfers the monitoring packet to the communication device (D1) 301, the communication device (D2) 302, or the communication device (D3) 303 through the input / output ports 111 to 113. The transfer of the monitoring packet in step B5 may be performed at an arbitrary timing after receiving the monitoring packet, and may be performed in parallel with, for example, step B3 and step B4.

The information notification unit 164 of the OAM processing unit 116 transmits a packet indicating information on the monitoring packet registered in the packet information storage unit 117 to the communication device B101 via the packet transfer unit 114 (step B6). In step B6, for example, the information notification unit 164 notifies the communication apparatus B101 of the registered monitoring information and the index number assigned to the monitoring packet.

The packet transfer unit 114 of the communication device B101 receives a packet indicating information related to the monitoring packet registered from the communication device C102 through the wireless signal processing unit 115 (step B7). The packet transfer unit 114 sends the received information to the OAM processing unit 116. In the communication apparatus B101, the registration unit 165 of the OAM processing unit 116 registers the information received in step B7 in the packet information storage unit 117 (step B8). In step B8, the registration unit 165 stores the monitoring information notified from the communication device C102 in association with the index number, for example. In the packet information storage unit 117 of the communication device B101 and the packet information storage unit 117 of the communication device C102, the same monitoring information is stored in association with the same index number. With the procedure so far, preparations for aggregating monitoring packets into aggregated packets are completed.

In the above description, an example has been described in which the communication apparatus C102 first registers monitoring information in the packet information storage unit 117, notifies the communication apparatus B101 of the registered monitoring information, and performs registration in the packet information storage unit 117. However, it is not limited to this. After registering the monitoring information in the packet information storage unit 117 in the communication device B101, the communication device B101 may notify the monitoring information registered in the communication device C102. In that case, the allocation of the index to the monitoring packet may be performed in the communication apparatus B101.

FIG. 9 shows the procedure of the monitoring packet aggregation process performed between the communication device B101 and the communication device C102. When it is determined in step A2 of FIG. 7 that the monitoring packet is an aggregation target, the aggregate information generation unit 162 generates aggregate information (step C1). In step C1, for example, when the monitoring packet corresponding to the index number “1” is aggregated in the aggregation information, the aggregation information generation unit 162 sets the bit value of the aggregation information corresponding to the index number “1” to “1”. set. The aggregate information generation unit 162 waits for the standby time, and when there is another monitor packet that is determined to be aggregated while waiting, the aggregate information generation unit 162 also aggregates the monitor packet into the same aggregate information. In this way, a plurality of aggregation target monitoring packets received during the standby time can be aggregated into one aggregated information.

The packet transfer unit 114 of the communication device B101 transmits the aggregate packet indicating the aggregate information generated in step C1 to the communication device C102 through the wireless signal processing unit 115 (step C2). The packet transfer unit 114 of the communication device C102 receives the aggregated packet from the communication device B101 through the wireless signal processing unit 115 (step C3). The packet transfer unit 114 sends the received aggregate packet (aggregation information) to the OAM processing unit 116.

The packet generation unit 163 of the OAM processing unit 116 generates a monitoring packet aggregated in the aggregation information based on the aggregation information and the monitoring information stored in the packet information storage unit 117 (step C4). In step C4, for example, the packet generation unit 163 acquires monitoring information of the index number corresponding to the bit for which “1” is set in the aggregate information from the packet information storage unit 117, and monitors the monitoring packet based on the acquired monitoring information. Is generated.

The packet transfer unit 114 transfers the monitoring packet generated in step C4 toward the destination (step C5). In step C5, for example, when a monitoring packet destined for the communication device (D1) 301 and the communication device (D3) 303 is generated in step C4, the packet transfer unit 114 performs communication via the input /

output ports

111 and 113. The monitoring packet is transferred to the device (D1) 301 and the communication device (D3) 303, respectively. In this way, a plurality of monitoring packets can be aggregated into an aggregated packet in the communication section between the communication apparatus B101 and the communication apparatus C102, and the traffic of the monitoring packet in the communication section can be reduced.

Next, the procedure for deleting the monitoring information stored in the packet information storage unit 117 will be described. FIG. 10 shows the procedure of the monitoring information deletion process performed between the communication device B101 and the communication device C102. In communication apparatus B101, which is the communication apparatus that transmits the aggregate information, the determination unit 161 periodically includes monitoring packets that are no longer received among the aggregation target monitoring packets stored in the packet information storage unit 117. (Step D1). In step D1, for example, the determination unit 161 monitors the reception period of the monitoring packet. If there is a monitoring packet that has passed a predetermined time or more from the previous reception time, the determination unit 161 determines that the monitoring packet is no longer received.

When it is determined that there is a monitoring packet that is no longer received in step D1, the information deletion unit 167 deletes information related to the monitoring packet from the packet information storage unit 117 (step D2). In step D2, for example, when it is determined in step D1 that the monitoring packet with the index number “2” has not been received for a predetermined time or longer, the information deletion unit 167 stores the monitoring stored in correspondence with the index number “2”. The information is deleted from the packet information storage unit 117. Further, the deletion instruction information generation unit 166 generates deletion instruction information including an instruction to delete the monitoring information of the monitoring packet that is no longer received. The packet transfer unit 114 transmits a packet indicating the deletion instruction information to the communication device C102 through the wireless signal processing unit 115 (step D3).

The packet transfer unit 114 of the communication device C102 receives the packet indicating the deletion instruction information through the wireless signal processing unit 115 (step D4). The packet transfer unit 114 passes the received deletion instruction information to the OAM processing unit 116. The information deletion unit 167 of the OAM processing unit 116 deletes the monitoring information of the designated monitoring packet from the packet information storage unit 117 according to the deletion instruction information (step D5). In step D5, for example, when the deletion instruction information instructs to delete the monitoring information of the monitoring packet with the index number “2”, the information deletion unit 167 sets the index number “2” from the packet information storage unit 117. Delete the corresponding stored monitoring information. When the monitoring information corresponding to the index number “2” is deleted in both communication apparatuses, the index number “2” becomes an empty number and can be assigned to another monitoring packet.

Next, transmission / reception of monitoring packets and aggregated packets between communication devices will be described. FIG. 11 shows monitoring packets and aggregate information transmitted and received between communication devices in the communication system 100. In FIG. 11, a monitoring packet 501 is a monitoring packet for monitoring the monitoring section 401. A monitoring packet 502 is a monitoring packet for monitoring the monitoring section 402, and a monitoring packet 503 is a monitoring packet for monitoring the monitoring section 403. The communication device (A1) 201 periodically transmits a monitoring packet 501 to the communication device (D1) 301. The communication device (A2) 202 periodically transmits the monitoring packet 502 toward the communication device (D2) 302, and the communication device (A3) 203 periodically transmits the monitoring packet 503 toward the communication device (D3) 303. Send.

The communication device B101 periodically receives monitoring packets 501 to 503 from the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203. If the monitoring packets 501 to 503 are not aggregation target monitoring packets, the communication device B101 transmits the monitoring packets to the communication device C102. Upon receiving the monitoring packets 501 to 503, the communication device C102 learns the contents and stores the monitoring information included in the monitoring packet in the packet information storage unit 117. The communication device C102 notifies the monitoring packet information stored in the communication device B101, and notifies that the monitoring packets 501 to 503 have been learned. Thereafter, in the communication apparatus B101, the monitoring packets 501 to 503 are monitoring packets to be aggregated.

Upon receiving the monitoring packets 501 to 503, the communication apparatus B101 determines that these monitoring packets are to be aggregated and generates aggregate information. The communication apparatus B101 aggregates the monitoring packets 501 to 503 received at almost the same timing into an aggregate packet 510, and transmits the aggregate packet 510 to the communication apparatus C102.

When the communication device C102 receives the aggregate packet 510, the communication device C102 checks which monitor packet is aggregated in the aggregate packet. The monitoring packet aggregated into the aggregate packet can be examined by referring to the bit value of the aggregate information, for example. The communication device C102 refers to the packet information storage unit 117 and generates monitoring packets 501 to 503 that are aggregated into aggregated packets, and generates them as a communication device (D1) 301, a communication device (D2) 302, and a communication device (D3). ) 303 respectively. In this way, the monitoring packets 501 to 503 transmitted from the communication device (A1) 201, the communication device (A2) 202, and the communication device (A3) 203 are converted into the communication device (D1) 301 and the communication device (D2). 302) and the communication device (D3) 303.

The communication system 100 and the monitoring sections 401 to 403 shown in FIGS. 2 and 11 are examples, and the configuration of the communication system and the setting of the monitoring sections are not limited to those described above. FIG. 12 shows another example of setting the communication system and the monitoring section. A communication system 100a according to another example includes a communication device (device A1) 201, a communication device (device A2) 202, a communication device (device B) 101, a communication device (device C) 102, a communication device (device D1) 301, and A communication device (device D3) 303 is included.

In the communication system 100a, four monitoring sections 411 to 414 are defined. The monitoring section 411 is a monitoring section in which the communication device (A1) 201 and the communication device (D1) 301 are MEPs. The monitoring section 412 is a monitoring section in which the communication device (A2) 202 and the communication device C102 are MEPs. The monitoring section 413 is a monitoring section in which the communication device B101 and the communication device (D3) 303 are MEPs. The monitoring section 414 is a monitoring section in which the communication device B101 and the communication device C102 are MEPs. A communication section between the communication apparatus B101 and the communication apparatus C102 is a section common to the monitoring sections 411 to 414. In this section, monitoring packets are aggregated into an aggregate packet 520.

The communication device B101 monitors the monitoring packet 511 and the monitoring device 412 that are periodically transmitted from the communication device (A1) 201 to the communication device (D1) 301 in order to monitor the monitoring device 411. A2) A monitoring packet 512 periodically transmitted from 202 to the communication device C102, a monitoring packet periodically transmitted from the own device to the communication device (D3) 303 in order to monitor the monitoring section 413, and monitoring In order to monitor the section 414, the monitoring packets periodically transmitted from the own apparatus to the communication apparatus C102 are aggregated into an aggregation packet 520. The communication apparatus C102 receives the aggregate packet 520 and generates a monitor packet aggregated into the aggregate packet 520 based on the aggregate packet 520 and the monitor information stored in the packet information storage unit 117 (see FIG. 3 and the like). To do.

If the monitoring packet 511 is aggregated in the aggregate packet 520, the communication apparatus C102 generates the aggregate packet 510 and transmits it to the communication apparatus (D1) 301. When the monitoring packet for monitoring the monitoring section 413 is aggregated in the aggregated packet 520, the communication device C102 generates the monitoring packet 513 and transmits it to the communication device (D3) 303.

The communication device C102 generates a monitoring packet 512 when the monitoring packet 512 destined for the communication device C102 is aggregated into an aggregated packet, and terminates the monitoring packet 512 in the communication device C102. The communication device C102 generates a monitoring packet and terminates the monitoring packet for monitoring the monitoring section 414 to which the own device is destined, if the monitoring packet is aggregated into the aggregated packet 520. To do. As shown in the example of FIG. 12, the monitoring packet whose source is the communication device B101 and the monitoring packet whose destination is the communication device C102 are also aggregated packets in the communication section between the communication device B101 and the communication device C102. 520.

In the present embodiment, the monitoring packets to be aggregated are aggregated and transmitted in the communication section between the communication apparatus B101 and the communication apparatus C102. The communication device that has received the aggregate packet generates a monitor packet aggregated into the aggregate packet based on the aggregate packet and the monitoring information stored in the packet information storage unit 117, and monitors the monitor packet toward the destination of the monitor packet. Send. By aggregating a plurality of monitoring packets into an aggregated packet, transmission of the plurality of monitoring packets can be omitted in the communication section between the communication device B101 and the communication device C102. For this reason, compared with the case where monitoring packets are not aggregated, the traffic required for transmission / reception of monitoring packets can be reduced in the communication section between the communication devices B101 and C102.

In the present embodiment, the monitoring packets are aggregated into aggregated packets in the communication interval between the communication device B101 and the communication device C102 in the monitoring interval. The monitoring sections of the aggregated monitoring packets only need to overlap in the communication section between the communication device B101 and the communication device C102, and one monitoring section need not be included in the other monitoring section. . Therefore, there is an advantage that the degree of freedom in setting the monitoring section is higher than that in Patent Document 1 in which one monitoring section needs to be included in the other monitoring section. The configuration in which the monitoring packets are aggregated and transmitted is particularly effective when the speed of the communication section between the communication apparatus B101 and the communication apparatus C102 is lower than the speed of the other communication sections. Conceivable.

Here, the aggregation of the monitoring packet into the aggregation packet (aggregation information) is not always performed, and the presence / absence of aggregation into the aggregation packet is controlled according to the network bandwidth or the bandwidth margin. It is good as well. For example, when wireless communication is performed between the communication device B101 and the communication device C102, the communication speed of the wireless communication may be controlled according to the weather or the like. In this case, when the communication speed is high, the monitoring packet may be transferred (transmitted) as it is without aggregation into the aggregation packet, and when the communication speed is low, the monitoring packet may be aggregated into the aggregation packet.

FIG. 13 shows a communication device capable of controlling the bandwidth of the communication section with the opposite communication device. A communication apparatus B 101a shown in FIG. 13 includes a band control unit (band control means) 118 in addition to the components of the communication apparatus B 101 shown in FIG. The communication device facing the communication device B 101a (corresponding to the communication device C102 in FIG. 2) also has the same configuration as the communication device B 101a shown in FIG. 13, and the following description applies to the communication device facing the communication device B 101a as well. Applicable.

The bandwidth control unit 118 controls the wireless signal processing unit 115 to control the bandwidth of communication with the facing communication device. The band control unit 118 controls the communication band by controlling the modulation scheme based on, for example, the quality of radio signals transmitted and received between communication apparatuses. For example, the bandwidth control unit 118 performs communication using a 256QAM (Quadrature Amplitude Modulation) modulation method in fine weather, thereby realizing high-speed communication between communication devices. When the error rate of the radio signal increases due to bad weather or the like, the band control unit 118 enables communication to be continued by switching the modulation method to a low-rate modulation method with high tolerance.

The OAM processing unit 116 determines whether to aggregate the monitoring packets into an aggregated packet or to transmit the monitoring packets without aggregating based on the bandwidth of communication with the opposing communication device. For example, the determination unit 161 (see FIG. 4) of the OAM processing unit 116 determines whether or not the received monitoring packet is a monitoring packet to be aggregated when the bandwidth is lower than a predetermined threshold value. To do. When the bandwidth is equal to or greater than a predetermined threshold value, the monitoring packet may be transmitted to the opposing communication device without determining whether the determination unit 161 is an aggregation target. For example, the OAM processing unit 116 transfers the monitoring packet as it is when the bandwidth control unit 118 transmits a radio signal by the 256QAM modulation method, and transmits the monitoring signal by the low rate modulation method. May be transmitted in an aggregated packet.

In the above, an example of controlling whether or not monitoring packets are aggregated according to the bandwidth between communication devices has been described, but instead of or in addition to this, aggregation into aggregated packets is performed according to the priority set in the monitoring packet Whether or not to do so may be determined. For example, MEL indicating the priority is set in the monitoring packet (CCM). When the priority is lower than a predetermined threshold, the determination unit 161 may determine whether or not the received monitoring packet is an aggregation target monitoring packet. When the priority is equal to or higher than a predetermined threshold, the monitoring packet may be transmitted to the opposing communication device without determining whether the determination unit 161 is an aggregation target.

・ When monitoring packets are aggregated into aggregated packets, it may take time to generate aggregated packets. A monitoring packet having a high priority can be transferred without being aggregated into an aggregated packet, thereby reducing the transmission delay of the monitoring packet having a high priority. Further, when the aggregated packet is lost between the communication devices, the aggregated monitoring packets are lost at a time. By sending individual monitoring packets for monitoring packets with high priority, the possibility that a plurality of monitoring packets with high priority disappear at a time can be reduced.

3 and 13 illustrate an example in which the communication apparatus includes three input / output ports 111 to 113 and one wireless signal processing unit 115. However, the number of input / output ports and the wireless signal processing unit are illustrated. Is arbitrary, and is not limited to those shown in FIGS. 3 and 13. FIG. 14 shows a communication apparatus having three wireless signal processing units. The communication device B 101b has the same configuration as that of the communication device B 101 shown in FIG. 3 except that the communication device B 101b includes three wireless signal processing units 115-1 to 115-3.

The wireless signal processing units 115-1 to 115-3 perform wireless communication with the communication devices facing each other. The facing communication device may have one wireless signal processing unit 115, similarly to the communication device B101 shown in FIG. Alternatively, the facing communication device may also have a plurality of wireless signal processing units 115. The communication device B 101b may have a band control unit 118 as with the communication device B 101a shown in FIG.

FIG. 15 shows a part of a communication system including the communication device B 101b shown in FIG. The communication device B 101b performs wireless communication with the communication device (C1) 102-1, the communication device (C2) 102-2, and the communication device (C3) 102-3. For example, the communication device B 101b communicates with the communication device (C1) 102-1 through the wireless signal processing unit 115-1, and communicates with the communication device (C2) 102-2 through the wireless signal processing unit 115-2. Communication with the communication device (C3) 102-3 is performed through the signal processing unit 115-3.

As shown in FIG. 15, when the communication device B 101b communicates with the communication device (C1) 102-1, the communication device (C2) 102-2, and the communication device (C3) 102-3, the communication device B 101b The same aggregate packet that is common to the three communication devices facing each other may be transmitted, or the aggregate packet may be individually transmitted to each of the three communication devices. When the communication device B 101b transmits a common aggregate packet to the three communication devices, the communication device B 101b assigns an index to the monitoring packet to avoid duplication of the index, and the assigned index is assigned to the three communication devices facing each other. It is good also as transmitting. Alternatively, the three communication devices facing each other may assign an index according to a predetermined rule, for example, by determining a range of an index to be assigned for each communication device.

The communication device B 101b may have a packet information storage unit 117 (see FIG. 3 or the like) for each facing communication device when individually transmitting the aggregate packet to the three facing communication devices. In this case, the index assigned to the monitoring packet may be managed individually between each of the three communication devices facing the communication device B 101b.

FIG. 10 illustrates an example in which it is determined whether or not there is a monitoring packet that is no longer received by the communication device B101 that transmits the aggregate information, and a deletion instruction is transmitted to the communication device C102. This is not a limitation. Contrary to the above, it may be determined whether there is a monitoring packet that is no longer received by the communication device C102 that receives the aggregated information, and a deletion instruction may be transmitted to the communication device B101. The determination as to whether or not there is a monitoring packet that is no longer received may be performed by the deletion instruction information generation unit 166 or the information deletion unit 167.

FIG. 10 shows an example in which the communication apparatus B101 transmits the deletion instruction information in step D3 after deleting the monitoring information in step D2. However, the present invention is not limited to this. The timing at which the monitoring information is deleted in the communication apparatus B101 is arbitrary. For example, after the communication device C102 deletes the monitoring information in step D5, a response indicating that the deletion is completed is transmitted to the communication device B101, and after the communication device B101 receives the response, the packet information storage unit of its own device The monitoring information may be deleted from 117.

In the above embodiment, an example in which the predetermined type of packet is a monitoring packet (CCM) of the OAM function in MPLS-TP has been described, but the predetermined type of packet is not limited to this. As a packet of a predetermined type to be aggregated, a packet that is periodically transmitted and whose content hardly changes is preferable. For example, the predetermined type of packet may be a monitoring packet in Ethernet (registered trademark) OAM. Alternatively, the predetermined type of packet may be another packet in the OAM function.

Various processing such as generation of aggregated information, generation of monitoring packets based on the aggregated information, and generation of delete instruction information performed by the communication device B101 and the communication device C102 is performed by a semiconductor processing device such as an ASIC (Application Specific Specific Integrated Circuit). You may implement | achieve using programmable devices, such as FPGA (field-programmable gate | array | array). These processes may be realized by causing a computer including at least one processor (e.g. microprocessor, Micro Processing Unit (MPU), Central Processing Unit (CPU)) to execute a program. Specifically, one or a plurality of programs including a group of instructions for causing the computer system to execute the algorithm described using the flowcharts and sequence diagrams in this specification are created, and the programs are supplied to the computer system. By doing so, various processes may be realized.

The above program can be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media such as flexible disks, magnetic tapes, and hard disks, magneto-optical recording media such as magneto-optical disks, CDs (compact discs), and DVDs (digital versatile discs). And an optical disk medium such as mask ROM (read only memory), PROM (programmable ROM), EPROM (erasable PROM), flash ROM, or RAM (random access memory). The program may also be supplied to a computer using various types of temporary computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

The present invention has been described above with reference to the embodiment, but the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.

For example, a part or all of the above embodiment can be described as in the following supplementary notes, but is not limited thereto.

[Appendix 1]
Communication means for communicating with other communication devices;
Packet transmission means for transmitting a packet to the other communication device through the communication means;
Prior to transmission of a packet of a predetermined type to the other communication device, a packet information storage unit that stores information on the packet to be aggregated is referred to, and it is determined whether the packet of the predetermined type to be transmitted is an aggregation target. A judgment means to
Aggregate information generating means for generating aggregate information that aggregates packets of a predetermined type determined to be aggregated by the determination means,
The packet transmission unit is a communication device that transmits a packet indicating the aggregation information to the other communication device when the determination unit determines that the packet is to be aggregated.

[Appendix 2]
The communication apparatus according to supplementary note 1, wherein the aggregated information generation unit includes information for identifying a predetermined type of packet determined to be aggregated by the determination unit in the aggregated information.

[Appendix 3]
The communication apparatus according to appendix 2, wherein the aggregated information generation unit includes information for identifying a plurality of packets of the predetermined type in the aggregated information.

[Appendix 4]
An index is assigned to the packet of the predetermined type to be aggregated, and the aggregate information generation unit is configured to specify information specifying an index corresponding to the packet of the predetermined type determined to be the aggregation target by the determination unit. 4. The communication apparatus according to

appendix

2 or 3, which is included in the aggregate information as information for specifying a type of packet.

[Appendix 5]
The aggregated information includes a bit corresponding to the index, and the aggregated information generating unit sets a predetermined value to a bit corresponding to an index of a packet of a predetermined type determined to be aggregated by the determining unit. The communication device described.

[Appendix 6]
A deletion instruction information generating means for generating deletion instruction information for instructing deletion of information related to the packet of the predetermined type when the predetermined type of packets to be aggregated does not occur for a predetermined time or more;
The communication device according to any one of appendices 1 to 5, wherein the packet transmission unit transmits a packet indicating the deletion instruction information to the other communication device.

[Appendix 7]
The communication apparatus according to any one of appendices 1 to 6, further comprising a registration unit that receives information on the packet of the predetermined type to be aggregated from the other communication apparatus and registers the information in the packet information storage unit.

[Appendix 8]
The priority is set for the predetermined type of packet, and the determination unit determines whether or not the packet is an aggregation target when the priority is lower than a predetermined threshold value. The communication apparatus as described in any one.

[Appendix 9]
Further comprising band control means for controlling the communication means and controlling the bandwidth of communication with the other communication device;
The communication device according to any one of appendices 1 to 8, wherein the determination unit determines whether or not the band is an aggregation target when the bandwidth is lower than a predetermined threshold value.

[Appendix 10]
The packet information storage means stores information related to a predetermined type of packet for which the other communication device holds information,
The communication device according to any one of appendices 1 to 9, wherein the determination unit determines that the packet is a target to be aggregated when the other communication device holds information of the predetermined type of packet to be transmitted.

[Appendix 11]
The communication device according to any one of appendices 1 to 10, wherein the predetermined type of packet is a monitoring packet that is periodically transmitted.

[Appendix 12]
The communication apparatus according to appendix 11, wherein a communication section with the other communication apparatus is included in a monitoring section monitored by the monitoring packet.

[Appendix 13]
13. The communication apparatus according to

appendix

11 or 12, wherein the packet information storage unit stores monitoring target information included in the monitoring packet as information on the predetermined type of packet.

[Appendix 14]
Communication means for communicating with other communication devices;
Packet receiving means for receiving packets from the other communication device through the communication means;
When a packet indicating aggregation information obtained by aggregating a plurality of packets of a predetermined type is received from the other communication device, a packet information storage unit that stores information on the packet of the predetermined type is referred to and the aggregation information is stored in the aggregation information. Packet generation means for generating aggregated packets of a predetermined type;
A communication apparatus comprising: a packet transmission unit configured to transmit a predetermined type of packet generated by the packet generation unit toward a destination.

[Appendix 15]
15. The communication apparatus according to appendix 14, further comprising registration means for registering information related to the received predetermined type packet in the packet information storage means when the predetermined type packet is received.

[Appendix 16]
The communication apparatus according to appendix 15, further comprising information notification means for transmitting information on a predetermined type of packet registered by the registration means to the other communication apparatus through the communication means.

[Appendix 17]
When a packet indicating deletion instruction information for instructing deletion of information related to a packet of a predetermined type is received from the other communication apparatus, the packet of the predetermined type instructed from the packet information storage unit according to the deletion instruction information The communication device according to any one of supplementary notes 14 to 16, further comprising an information deleting means for deleting information.

[Appendix 18]
A communication method in a communication device that performs communication with another communication device,
Prior to transmission of a packet of a predetermined type to the other communication device, a packet information storage unit that stores information on the packet to be aggregated is referred to, and it is determined whether the packet of the predetermined type to be transmitted is an aggregation target. And
Generating aggregated information that aggregates packets of a predetermined type determined to be aggregated in the determination;
A communication method comprising transmitting a packet indicating the aggregated information to the other communication device.

[Appendix 19]
A communication method in a communication device that performs communication with another communication device,
Receiving a packet indicating aggregation information in which a plurality of predetermined types of packets are aggregated from the other communication device;
Referring to packet information storage means for storing information of the packet of the predetermined type, generating a packet of the predetermined type aggregated in the aggregated information;
A communication method comprising transmitting a generated packet of a predetermined type toward a destination.

[Appendix 20]
A program for causing a computer to communicate with another communication device, wherein the computer
Prior to transmission of a packet of a predetermined type to the other communication device, a packet information storage unit that stores information on the packet to be aggregated is referred to, and it is determined whether the packet of the predetermined type to be transmitted is an aggregation target. And
Generating aggregated information that aggregates packets of a predetermined type determined to be aggregated in the determination;
A non-transitory computer-readable medium storing a program for causing a packet indicating the aggregated information to be transmitted to the other communication device.

[Appendix 21]
A program for causing a computer to communicate with another communication device, wherein the computer
Receiving a packet indicating aggregation information in which a plurality of predetermined types of packets are aggregated from the other communication device;
Referring to packet information storage means for storing information of the packet of the predetermined type, generating a packet of the predetermined type aggregated in the aggregated information;
A non-transitory computer-readable medium storing a program for causing a generated packet of a predetermined type to be transmitted to a destination.

[Appendix 22]
A communication system including a first communication device and a second communication device,
Prior to transmission of a predetermined type of packet to the second communication device, communication means for communicating with the second communication device, packet transmission means for transmitting a packet to the second communication device through the communication means, Reference is made to packet information storage means for storing information relating to packets to be aggregated, judgment means for judging whether or not a predetermined type of packet to be transmitted is an aggregation target, and the predetermined that is judged as an aggregation target by the judgment means Aggregate information generating means for generating aggregate information that aggregates the packets of the type, and when the determination means determines that the packet is to be aggregated, the packet transmission means sends a packet indicating the aggregate information to the second information A first communication device for transmitting to the communication device;
Communication means for communicating with the first communication device, packet receiving means for receiving packets from the first communication device through the communication means, and a plurality of predetermined types of packets from the first communication device are aggregated A packet generation unit that generates a packet of a predetermined type aggregated in the aggregated information with reference to a packet information storage unit that stores information of the predetermined type of packet when a packet indicating the aggregated information is received; A communication system comprising: a second communication device comprising: a packet transmission unit configured to transmit a packet of a predetermined type generated by the packet generation unit to a destination.

[Appendix 23]
A communication method in a communication system including a first communication device and a second communication device,
Prior to transmission of a packet of a predetermined type from the first communication device to the second communication device, a packet information storage unit that stores information related to packets to be aggregated is referred to. Determine whether it is a target of aggregation,
Generating aggregated information that aggregates packets of a predetermined type determined to be aggregated in the determination;
A packet indicating the aggregate information is transmitted from the first communication device to the second communication device;
A packet indicating the aggregated information is received from the first communication device, and a packet of a predetermined type aggregated in the aggregated information is generated by referring to a packet information storage unit that stores information of the predetermined type of packet. ,
A communication method comprising: transmitting a generated packet of a predetermined type from the second communication device to a destination.

This application claims priority based on Japanese Patent Application No. 2016-131806 filed on July 1, 2016, the entire disclosure of which is incorporated herein.

10: Communication system 11: Communication device 12: Communication unit 13: Packet transmission unit 14: Aggregation information generation unit 15: Determination unit 16: Packet information storage unit 21: Communication device 22: Communication unit 23: Packet reception unit 24: Packet generation Unit 25: packet transmission unit 26: packet information storage unit 51: node 52: node 53: monitoring packets 61 to 62: communication node 67: inner monitoring section 68: outer monitoring section 69, 70: inner monitoring section 100: communication system 101 : Communication device (device B)
102: Communication device (device C)
111 to 113: Input / output port 114: Packet transfer unit 115: Radio signal processing unit 116: OAM processing unit 117: Packet information storage unit 118: Band control unit 161: Determination unit 162: Aggregation information generation unit 163: Packet generation unit 164 : Information notification unit 165: Registration unit 166: Deletion instruction information generation unit 167: Information deletion unit 201: Communication device (device A1)
202: Communication device (device A2)
203: Communication device (device A3)
301: Communication device (device D1)
302: Communication device (device D2)
303: Communication device (device D3)
401 to 403: monitoring sections 411 to 414: monitoring sections 501 to 503: monitoring packets 510: aggregated packets 511 to 513: monitoring packets 520: aggregated packets

Claims

Communication means for communicating with other communication devices;
Packet transmission means for transmitting a packet to the other communication device through the communication means;
Prior to transmission of a packet of a predetermined type to the other communication device, a packet information storage unit that stores information on the packet to be aggregated is referred to, and it is determined whether the packet of the predetermined type to be transmitted is an aggregation target. A judgment means to
Aggregate information generating means for generating aggregate information that aggregates packets of a predetermined type determined to be aggregated by the determination means,
The packet transmission unit is a communication device that transmits a packet indicating the aggregation information to the other communication device when the determination unit determines that the packet is to be aggregated.
The communication apparatus according to claim 1, wherein the aggregated information generation unit includes information for identifying a predetermined type of packet that is determined to be aggregated by the determination unit in the aggregated information.
The communication apparatus according to claim 2, wherein the aggregated information generating unit includes information for identifying a plurality of packets of the predetermined type in the aggregated information.
An index is assigned to the packet of the predetermined type to be aggregated, and the aggregate information generation unit is configured to specify information specifying an index corresponding to the packet of the predetermined type determined to be the aggregation target by the determination unit. The communication apparatus according to claim 2, wherein the communication information is included in the aggregated information as information for specifying a type of packet.
5. The aggregate information includes a bit corresponding to the index, and the aggregate information generation unit sets a predetermined value to a bit corresponding to an index of a predetermined type of packet determined to be aggregated by the determination unit. The communication apparatus as described in.
A deletion instruction information generating means for generating deletion instruction information for instructing deletion of information related to the packet of the predetermined type when the predetermined type of packets to be aggregated does not occur for a predetermined time or more;
The communication device according to claim 1, wherein the packet transmission unit transmits a packet indicating the deletion instruction information to the other communication device.
The communication device according to any one of claims 1 to 6, further comprising a registration unit that receives information on the packet of the predetermined type to be aggregated from the other communication device and registers the packet in the packet information storage unit.
The priority is set for the predetermined type of packet, and the determination unit determines whether or not the packet is an aggregation target when the priority is lower than a predetermined threshold. The communication apparatus according to any one of 7.
Further comprising band control means for controlling the communication means and controlling the bandwidth of communication with the other communication device;
The communication device according to any one of claims 1 to 8, wherein the determination unit determines whether or not the band is to be aggregated when the bandwidth is lower than a predetermined threshold value.
The packet information storage means stores information related to a predetermined type of packet for which the other communication device holds information,
The communication device according to any one of claims 1 to 9, wherein the determination unit determines that the packet is a target to be aggregated when the other communication device holds information on a predetermined type of packet to be transmitted.
The communication device according to any one of claims 1 to 10, wherein the predetermined type of packet is a monitoring packet transmitted periodically.
The communication device according to claim 11, wherein a communication section with the other communication device is included in a monitoring section monitored by the monitoring packet.
The communication apparatus according to claim 11 or 12, wherein the packet information storage unit stores monitoring target information included in the monitoring packet as information on the predetermined type of packet.
Communication means for communicating with other communication devices;
Packet receiving means for receiving packets from the other communication device through the communication means;
When a packet indicating aggregation information obtained by aggregating a plurality of packets of a predetermined type is received from the other communication device, a packet information storage unit that stores information on the packet of the predetermined type is referred to and the aggregation information is stored in the aggregation information. Packet generation means for generating aggregated packets of a predetermined type;
A communication apparatus comprising: a packet transmission unit configured to transmit a predetermined type of packet generated by the packet generation unit toward a destination.
15. The communication apparatus according to claim 14, further comprising: a registering unit that registers information on the received packet of the predetermined type in the packet information storage unit when the packet of the predetermined type is received.
16. The communication apparatus according to claim 15, further comprising information notification means for transmitting information on a predetermined type of packet registered by the registration means to the other communication apparatus through the communication means.
When a packet indicating deletion instruction information for instructing deletion of information related to a packet of a predetermined type is received from the other communication apparatus, the packet of the predetermined type instructed from the packet information storage unit according to the deletion instruction information The communication apparatus according to any one of claims 14 to 16, further comprising an information deleting unit that deletes information.
A communication method in a communication device that performs communication with another communication device,
Prior to transmission of a packet of a predetermined type to the other communication device, a packet information storage unit that stores information on the packet to be aggregated is referred to, and it is determined whether the packet of the predetermined type to be transmitted is an aggregation target. And
Generating aggregated information that aggregates packets of a predetermined type determined to be aggregated in the determination;
A communication method comprising transmitting a packet indicating the aggregated information to the other communication device.
A communication method in a communication device that performs communication with another communication device,
Receiving a packet indicating aggregation information in which a plurality of predetermined types of packets are aggregated from the other communication device;
Referring to packet information storage means for storing information of the packet of the predetermined type, generating a packet of the predetermined type aggregated in the aggregated information;
A communication method comprising transmitting a generated packet of a predetermined type toward a destination.
A program for causing a computer to communicate with another communication device, wherein the computer
Prior to transmission of a packet of a predetermined type to the other communication device, a packet information storage unit that stores information on the packet to be aggregated is referred to, and it is determined whether the packet of the predetermined type to be transmitted is an aggregation target. And
Generating aggregated information that aggregates packets of a predetermined type determined to be aggregated in the determination;
A non-transitory computer-readable medium storing a program for causing a packet indicating the aggregated information to be transmitted to the other communication device.
A program for causing a computer to communicate with another communication device, wherein the computer
Receiving a packet indicating aggregation information in which a plurality of predetermined types of packets are aggregated from the other communication device;
Referring to packet information storage means for storing information of the packet of the predetermined type, generating a packet of the predetermined type aggregated in the aggregated information;
A non-transitory computer-readable medium storing a program for causing a generated packet of a predetermined type to be transmitted to a destination.
A communication system including a first communication device and a second communication device,
Prior to transmission of a predetermined type of packet to the second communication device, communication means for communicating with the second communication device, packet transmission means for transmitting a packet to the second communication device through the communication means, Reference is made to packet information storage means for storing information relating to packets to be aggregated, judgment means for judging whether or not a predetermined type of packet to be transmitted is an aggregation target, and the predetermined that is judged as an aggregation target by the judgment means Aggregate information generating means for generating aggregate information that aggregates the packets of the type, and when the determination means determines that the packet is to be aggregated, the packet transmission means sends a packet indicating the aggregate information to the second information A first communication device for transmitting to the communication device;
Communication means for communicating with the first communication device, packet receiving means for receiving packets from the first communication device through the communication means, and a plurality of predetermined types of packets from the first communication device are aggregated A packet generation unit that generates a packet of a predetermined type aggregated in the aggregated information with reference to a packet information storage unit that stores information of the predetermined type of packet when a packet indicating the aggregated information is received; A communication system comprising: a second communication device comprising: a packet transmission unit configured to transmit a packet of a predetermined type generated by the packet generation unit to a destination.
A communication method in a communication system including a first communication device and a second communication device,
Prior to transmission of a packet of a predetermined type from the first communication device to the second communication device, a packet information storage unit that stores information related to packets to be aggregated is referred to. Determine whether it is a target of aggregation,
Generating aggregated information that aggregates packets of a predetermined type determined to be aggregated in the determination;
A packet indicating the aggregate information is transmitted from the first communication device to the second communication device;
A packet indicating the aggregated information is received from the first communication device, and a packet of a predetermined type aggregated in the aggregated information is generated by referring to a packet information storage unit that stores information of the predetermined type of packet. ,
A communication method comprising: transmitting a generated packet of a predetermined type from the second communication device to a destination.