JP2016058905A - Communication device and communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform QoS control depending on service.SOLUTION: A CMC 32 electrically connected to both of a plurality of communication apparatuses 40 related to respective service provided for a user and a D-ONU 31 for transmitting a packet from a communication apparatus 40 to an upper rank device by using an optical communication comprises: a reception unit 321 for receiving a DHCP packet from the communication apparatus 40; an identification unit 323 for identifying apparatus information that is included in the DHCP packet and shows the communication apparatus 40 of a packet transmission source and service information showing service to be provided by the communication apparatus 40 of the transmission source; a determination unit 324 for determining, on the basis of the apparatus information and the service information, a control content to be performed upon receiving a packet from the communication apparatus 40 shown by the apparatus information; and a transmission unit 326 for performing control according to the control content to transmit the packet to the D-ONU 31.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a communication apparatus and a communication system used for an FTTx system.

  The spread of FTTx (Fiber To The x), which performs wired communication using an optical fiber, is advancing. In addition to FTTH (Fiber To The Home), which directs the optical cable directly into the user's house, for example, the optical cable is drawn into the main distribution board installed in the apartment house. FTTB (Fiber To The Building) etc. that draws telephone lines, coaxial cables, etc. are included. Patent Document 1 discloses a communication system having an FTTB configuration in which a coaxial cable is drawn into each user's home.

JP 2013-143597 A

  In recent years, services provided to users by optical communication have been diversified, such as the Internet, telephone, and broadcasting. In performing these communications, it is important to reliably provide a high priority service by performing QoS (Quality of Service) control such as bandwidth control and priority control. For example, in the communication system described in Patent Document 1 described above, QoS control of a coaxial cable section (that is, a section from a common part of an apartment house to each home) is performed using DOCSIS, which is an international standard for communication services using coaxial cables. (Data Over Cable Service Interface Specifications)

  However, in an optical cable section (more specifically, an ONU (Optical Network Unit) to OLT (Optical Line Terminal) section) which is a higher-order section of the coaxial cable section, for example, any data transmitted via the coaxial cable is It is difficult to identify whether the data is transmitted from a device related to the service, and as a result, QoS control according to the service cannot be performed.

  The present invention has been made to solve the above-described problem, and relates to a communication apparatus and a communication system capable of performing QoS control according to a service.

  A communication apparatus according to the present invention includes, as one aspect, a plurality of communication apparatuses related to each service provided to a user, and a first optical line termination apparatus that transmits packets from the communication apparatus to a host apparatus through optical communication , A communication device electrically connected to both, receiving means for receiving a packet for address acquisition from a communication device, and device information included in the packet, indicating a communication device that is a transmission source of the packet, And, based on the device information and the service information, specifying means for identifying the service information indicating the service provided by the transmission source communication device, and the control content to be performed when the packet is received from the communication device indicated by the device information And a transmission unit that performs control according to the control content and transmits the packet to the first optical network unit.

  ADVANTAGE OF THE INVENTION According to this invention, the communication apparatus and communication system which can perform QoS control according to service can be provided.

It is a block diagram which shows the structure of the communication system which concerns on 1st Embodiment. It is a block diagram which shows the function of CMC of FIG. It is a figure which shows a VLAN ID mapping table. It is a figure which shows packet transmission / reception using a VLAN ID mapping table. It is a sequence diagram which shows the process of the communication system which concerns on 1st Embodiment. It is a sequence diagram which shows the process of the communication system which concerns on 1st Embodiment. It is a sequence diagram which shows the process of the communication system which concerns on 1st Embodiment. It is a figure which shows packet transmission / reception of the communication system which concerns on a comparative example. It is a figure which shows the WAN port mapping table of the communication system which concerns on 2nd Embodiment. It is a figure which shows packet transmission / reception using a WAN port mapping table. It is a sequence diagram which shows the process of the communication system which concerns on 2nd Embodiment. It is a sequence diagram which shows the process of the communication system which concerns on 2nd Embodiment.

[Description of Embodiment of Present Invention]
First, the contents of the embodiments of the present invention will be listed and described.

  A communication apparatus according to the present invention includes, as one aspect, a plurality of communication apparatuses related to each service provided to a user, and a first optical line termination apparatus that transmits packets from the communication apparatus to a host apparatus through optical communication , A communication device electrically connected to both, receiving means for receiving a packet for address acquisition from a communication device, and device information included in the packet, indicating a communication device that is a transmission source of the packet, And, based on the device information and the service information, specifying means for identifying the service information indicating the service provided by the transmission source communication device, and the control content to be performed when the packet is received from the communication device indicated by the device information And a transmission unit that performs control according to the control content and transmits the packet to the first optical network unit.

  In this communication apparatus, device information indicating a transmission source communication device and service information indicating a service provided by the communication device are specified based on a packet transmitted from the communication device of each service. Then, based on these pieces of information, the control content to be performed when the packet is received from the communication device is determined, the control according to the control content is performed, and the packet is transmitted to the first optical line terminating device. The As a result, the control content is determined according to the service provided by the communication device of the packet transmission source. Then, after the control according to the control content is performed, the packet is transmitted to the first optical line terminator. Therefore, in the first optical line terminator that has received the packet, the packet transmission source communication device It is possible to specify the service provided. For this reason, it is possible to perform QoS control according to the service related to the packet even in the section from the first optical line termination device to the host device.

  The determining means determines to add an identifier according to the service information to the packet as control content, and the transmitting means transmits the packet to the first optical line terminating device after adding the identifier to the packet. May be. As a result, the first optical network unit that has received the packet can identify the service provided by the packet transmission source communication device based on the identifier (for example, VLAN ID). Since the service is specified by the identifier, QoS control corresponding to the service related to the packet can be performed even in a configuration in which the number of ports on the first optical network unit side is small (for example, 1 port).

  The communication apparatus further includes at least a number of WAN ports connectable to the first optical line terminator, and the determining means controls the packet transmission from the WAN port corresponding to the service information. The transmission means may transmit the packet to the first optical network unit after setting the WAN port according to the service information as the packet transmission port. As a result, the first optical network unit that has received the packet can identify the service provided by the packet transmission source communication device based on the physical port difference. For example, in the case where the first optical line termination device must have a plurality of configurations, it is possible to perform QoS control according to the service related to the packet with a simple configuration in which physical ports are different. .

  The communication apparatus further includes storage means for storing device information, service information, and mapping information in which control contents are associated, and the transmission means performs control based on the mapping information and transmits the packet to the first optical line termination. It may be sent to the device. By storing the mapping information, the transmission process at the time of packet reception can be performed quickly and easily.

  The receiving means may receive a DHCP packet from the communication device as a packet from the communication device. Since the DHCP packet includes information indicating a service provided by the communication device, the service information can be reliably specified.

  As one aspect of the communication system according to the present invention, a switch unit connected to a plurality of networks related to each service provided to a user, and a second optical line termination device electrically connected to the switch unit, A first optical line terminator that performs optical communication with the second optical line terminator, a plurality of communication devices related to each service provided to the user, and the first optical line terminator, A communication device that is electrically connected to both sides, the communication device indicating a receiving device that receives an address acquisition packet from the communication device, and a communication device that is included in the packet and that is a transmission source of the packet When a packet is received from the communication device indicated by the device information based on the device information and the service information based on the device information and the service information indicating the service information indicating the service provided by the source communication device Determining means for determining the control content performed, it performs control in accordance with the control content, and transmission means for transmitting the packet to the first optical line termination device may have.

  Further, the switch unit and the second optical line terminator, and the first optical line terminator and the communication device are each connected by a LAN cable, and the communication device and the plurality of communication devices are connected by a coaxial cable. The communication apparatus may further include conversion means for converting the signal for the coaxial cable related to the packet received by the reception means into the signal for the LAN cable related to the packet transmitted by the transmission means. According to the said structure, it becomes possible to perform QoS control according to the service which concerns on a packet in the DOCSIS system using a coaxial cable, for example in the FTTB structure of an apartment house.

[Details of the embodiment of the present invention]
Specific examples of a communication device and a communication system according to an embodiment of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and is intended that all the changes within the meaning and range equal to the claim are included.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of a communication system according to the first embodiment. The communication system 1 is a communication system used in an FTTx (Fiber To The x) configuration in which wired communication is performed using an optical fiber, and more specifically, an optical cable is drawn into a common part of an apartment house, and each user is connected to the common part. It is a communication system used in an FTTB configuration for drawing a telephone line, a coaxial cable, etc. up to the home. The communication system 1 according to the present embodiment performs data communication by a DOCSIS system that performs high-speed data communication using a cable television line. In the DOCSIS system, a coaxial cable is used in a section from a common part of an apartment house to each user's house, and data communication is realized by using a prescribed arbitrary frequency.

  The communication system 1 can provide a plurality of services such as a telephone service and a broadcast service by using optical communication, and includes a head end facility 10 and an apartment house facility 20. The communication system 1 performs data communication using GE-PON (Gigabit Ethernet-Passive Optical Network) technology. Therefore, a plurality of apartment housing facilities 20 (more specifically, a plurality of D-ONUs 31) are connected to one head end facility 10 (more specifically, one OLT 16).

  The headend facility 10 is a group of devices on the upper side (station side) as viewed from the apartment building facility 20, and includes a communication service network 11, a telephone service network 12, a broadcast service network 13, a DOCSIS management network 14, and L2. / L3 switch 15 (switch unit) and OLT 16 (second optical line terminator). The communication service network 11 is a network that is accessed through an Internet connection or the like from a PC (Personal Computer). The telephone service network 12 is a network that is accessed when a telephone service using a TA (Terminal Adapter) or the like is used. The broadcast service network 13 is a network that is accessed when a television broadcast (video) service using STB (Set Top Box) or the like is used. The DOCSIS management network 14 is a network that is accessed when data communication is performed by the DOCSIS method.

  The L2 / L3 switch 15 is a relay device connected to a plurality of networks (for example, the communication service network 11, the telephone service network 12, the broadcast service network 13, and the DOCSIS management network 14) related to each service provided to the user. Yes, the packet transmitted from the OLT 16 is distributed to one of the networks of each service. Further, the L2 / L3 switch 15 transfers a packet transmitted from the network of each service to the OLT 16. The L2 / L3 switch 15 can determine a packet distribution destination based on data link layer and network layer data in an OSI (Open Systems Interconnection) reference model. In the present embodiment, the L2 / L3 switch 15 distributes packets by setting a VLAN ID that is an identification number (identifier) of a VLAN (Virtual Local Area Network) for each network. For example, the communication service network 11 has VLAN ID: A, the telephone service network 12 has VLAN ID: B, the broadcast service network 13 has VLAN ID: C, the DOCSIS management network 14 has VLAN ID: D, Each is set.

  The OLT 16 is an optical line terminating device on the host device side that is electrically connected to the L2 / L3 switch 15. The OLT 16 and the L2 / L3 switch 15 are connected by a LAN (Local Area Network) cable C1 and communicate by Ethernet (registered trademark). The OLT 16 transfers the packet transmitted from the apartment house facility 20 (more specifically, the D-ONU 31) to the L2 / L3 switch 15. Further, the OLT 16 transfers the packet transmitted from the L2 / L3 switch 15 to the apartment house facility 20 (more specifically, the D-ONU 31).

  The collective housing facility 20 is a facility such as a condominium, for example, and includes a shared unit 30 and a plurality of user homes 51 and 52. An optical fiber C2 is drawn into the shared unit 30, and a coaxial cable C4 is laid in the section from the shared unit 30 to the user homes 51 and 52.

  The shared unit 30 includes a D-ONU 31, a CMC (Coax Media Converter) 32 (communication device), and a bidirectional booster 33. The D-ONU 31 and the CMC 32 are connected by a LAN cable C3 and communicate by Ethernet (registered trademark). The CMC 32 and the bidirectional booster 33 are connected by a coaxial cable C4, and communication is performed by a DOCSIS signal defined by DOCSIS.

  The D-ONU 31 is an optical line terminating device on the user's home side that performs optical communication with the OLT 16 that is an optical line terminating device on the host device side. The D-ONU 31 transmits the packet received from the CMC 32 to the higher-level device (OLT 16) by optical communication, and transmits the packet received from the higher-level device (OLT 16) to the CMC 32.

  The CMC 32 is a converter that mutually converts an Ethernet (registered trademark) signal and a DOCSIS signal. That is, the CMC 32 uses the Ethernet (registration) related to the packet to be transmitted to the D-ONU 31 via the LAN cable C3 and the DOCSIS signal (signal for the coaxial cable) related to the packet received from the bidirectional booster 33 via the coaxial cable C4. Trademark) signal (signal for LAN cable). Further, the CMC 32 converts an Ethernet (registered trademark) signal related to a packet received from the D-ONU 31 via the LAN cable C3 into a DOCSIS signal related to a packet to be transmitted to the bidirectional booster 33 via the coaxial cable C4. The CMC 32 has a WAN (Wide Area Network) port for upper connection (for connection on the D-ONU 31 side) and an RF (Radio Frequency) port for lower connection (for connection on the bidirectional booster 33 side). The WAN port is, for example, a port that supports 1000BASE-T in the Ethernet (registered trademark) standard. The RF port is a port corresponding to signal transmission for a coaxial cable. Detailed functions of the CMC 32 will be described later.

  The bidirectional booster 33 is a booster that can amplify not only the downstream signal from the host device but also the upstream signal from the lower communication device 40 toward the host device. The bidirectional booster 33 is connected to the CMC 32, which is a higher-level device, via a coaxial cable C4. Further, the bidirectional booster 33 is connected to the communication device 40 and the antenna unit 60 of the user homes 51 and 52 via the coaxial cable C4. The antenna unit 60 includes antennas for cable television, terrestrial, BS (Broadcasting Satellite), and CS (Communications Satellite). A television broadcast service without optical communication can be provided by a signal from the antenna unit 60.

  Each of the user homes 51 and 52 is, for example, one room of a condominium, and includes a plurality of communication devices 40 related to each service provided to the user. Specifically, the user homes 51 and 52 include a CM (Cable Modem) 41, an EMTA (Embedded Media Terminal Adapter) 42, and a CM built-in STB (Set Top Box) 43 as a plurality of communication devices 40. Yes. The CM 41 is a DOCSIS cable modem for communication use. The EMTA 42 is a product used in a telephone application in which a CM and a TA for an IP telephone are integrated. The CM built-in STB 43 is a product used in broadcasting applications in which the DOCSIS cable modem and the STB are integrated.

  Here, in performing communication of each service provided to the user, it is important to reliably provide a high-priority service by performing QoS control such as bandwidth control and priority control. The QoS control needs to be appropriately performed not only in the section of the coaxial cable C4 but also in the optical fiber C2 section that is a section between the D-ONU 31 and the OLT 16. Hereinafter, the function of the CMC 32 related to the QoS control according to the service in the section between the D-ONU 31 and the OLT 16 will be described in detail with reference to FIG.

  FIG. 2 is a block diagram showing functions of the CMC 32 of FIG. As shown in FIG. 2, the CMC 32 includes a receiving unit 321 (receiving unit), a converting unit 322 (converting unit), a specifying unit 323 (specifying unit), a determining unit 324 (determining unit), and a storage unit 325. (Storage means) and a transmission unit 326 (transmission means). Hereinafter, each function of the CMC 32 realized by using a DHCP (Dynamic Host Configuration Protocol) packet when the communication device 40 acquires an IP address will be described.

  The receiving unit 321 receives a DHCP packet (address acquisition packet) transmitted from the communication device 40 via the bidirectional booster 33 and the coaxial cable C4. The DHCP packet received by the receiving unit 321 via the coaxial cable C4 is a DOCSIS signal adopting the DOCSIS method. The reception unit 321 inputs the DHCP packet to the conversion unit 322.

  The conversion unit 322 converts the DHCP packet from a DOCSIS signal to an Ethernet (registered trademark) signal. The conversion unit 322 inputs the DHCP packet converted into the Ethernet (registered trademark) signal to the specifying unit 323.

  The identifying unit 323 identifies device information indicating the communication device 40 that is the transmission source of the DHCP packet. Specifically, the specifying unit 323 specifies a MAC (Media Access Control) address indicating the transmission source communication device 40 included in the DHCP packet as the device information. Further, the specifying unit 323 specifies service information indicating a service provided by the transmission source communication device 40. Specifically, the specifying unit 323 specifies service information based on option information included in the DHCP packet.

  The option information is information included in the DHCP packet in both an IPv4 (Internet Protocol version 4) network communication service and an IPv6 (Internet Protocol version 6) network communication service. Option information included in the DHCP packet of the IPv4 network is Option 60, and option information included in the DHCP packet of the IPv6 network is Option 16. The character string included in the option information can be arbitrarily set in advance. For example, “docsis” is set as a character string of option information included in the DHCP packet transmitted from the CM 41 which is the DOCSIS cable modem, and included in the DHCP packet transmitted from the TA 42b (see FIG. 4) of the EMTA 42 related to the telephone service. “Pktc” is set as a character string of option information to be set, and “stb” is set as a character string of option information included in the DHCP packet transmitted from the STB 43b (see FIG. 4) of the CM built-in STB 43 related to the television broadcasting service . By setting the association between the character string of the option information and the service to be provided in advance, the specifying unit 323 can specify the service information from the character string. The specifying unit 323 inputs the DHCP packet, the specified device information (MAC address), and service information to the determining unit 324.

  The determination unit 324 determines the control content to be performed when a packet is received from the communication device 40 based on the device information and the service information. The time when a packet is received is not limited to when a DHCP packet is received, but when all packets received after determining control contents are received. Specifically, the determination unit 324 determines to add the VLAN ID (identifier) corresponding to the service information to the packet as the control content. The control content is determined based on a VLAN ID mapping table (mapping information) stored in the storage unit 325. The determination of the control content will be described with reference to FIG. FIG. 3 is a diagram showing a VLAN ID mapping table.

  As shown in FIG. 3, in the VLAN ID mapping table MT, the transmission source communication device 40, the character string of option information, device information (MAC address), VLAN ID, and service information are associated with each other. . D is set as the VLAN ID of the CM 41 in which the character string “docsis” of the option information is set. Further, B is set as the VLAN ID of the TA 42b (see FIG. 4) in which the character string “pktc” of the option information is set. Also, C is set as the VLAN ID of the STB 43b in which the character string “stb” of the option information is set. Further, A is set as the VLAN ID of the communication device 40 (other communication device 40) in which the character string does not exist in the option information or the character string is other than the above. Note that the VLAN ID mapping table MT is in an initial state in which items other than device information are associated in advance.

  When the device information and the service information are input from the specifying unit 323, the determination unit 324 refers to the VLAN ID mapping table MT stored in the storage unit 325 and acquires the value of the VLAN ID associated with the input service information. . At this time, the determination unit 324 sets (learns) the input device information in the item of device information associated with the input service information in the VLAN ID mapping table MT, and updates the VLAN ID mapping table MT. . The determination unit 324 determines to add the acquired VLAN ID value to the packet (in this case, the DHCP packet), and inputs the DHCP packet and the VLAN ID value to the transmission unit 326.

  The transmission unit 326 performs control according to the control content determined by the determination unit 324. That is, the transmission unit 326 adds the VLAN ID value acquired by the determination unit 324 based on the VLAN ID mapping table MT to the DHCP packet. Then, the transmission unit 326 transmits the DHCP packet to which the VLAN ID value is added to the D-ONU 31.

  FIG. 4 is a diagram showing DHCP packet transmission / reception using the VLAN ID mapping table. The PC 41x is a PC that is connected to the CM 41 and performs Internet connection or the like. The EMTA 42 includes a TA 42b connected to the telephone 42c and a CM 42a. The CM built-in STB 43 includes an STB 43b connected to the television 43c and a CM 43a.

  The CMC 32 adds the VLAN ID to the DHCP packet received from the communication device 40, and transmits the added DHCP packet to the D-ONU 31. Thereafter, when receiving a packet from the same communication device 40, the D-ONU 31 adds an LLID corresponding to the VLAN ID to the packet, and transmits the packet after the addition to the OLT 16. The LLID is an identifier added to realize logical one-to-one communication in a one-to-N communication system such as GE-PON. QoS control can be performed for each LLID between the D-ONU 31 and the OLT 16. The OLT 16 converts the VLAN ID corresponding to the LLID again, and transmits the packet with the VLAN ID added to the L2 / L3 switch 15. The L2 / L3 switch 15 distributes the packet destination based on the VLAN ID of the packet and performs QoS control according to the VLAN ID.

  For example, when a DHCP packet is transmitted from the PC 41 x to the CMC 32, the DHCP packet with the VLAN ID: A added is transmitted from the CMC 32 to the D-ONU 31. Then, a packet to which LLID: A corresponding to VLAN ID: A is added is transmitted from the D-ONU 31 to the OLT 16. Further, the packet with the VLAN ID: A added thereto is transmitted again from the OLT 16 to the L2 / L3 switch 15, and the communication service network 11 that is a transmission destination based on the VLAN ID: A is transmitted in the L2 / L3 switch 15. A packet is sent to

  Similarly, when a DHCP packet is transmitted from the CMs 41, 42 a, 43 a to the CMC 32, a DHCP packet to which VLAN ID: D is added is transmitted from the CMC 32 to the D-ONU 31. Then, a packet to which LLID: D corresponding to VLAN ID: D is added is transmitted from D-ONU 31 to OLT 16. Further, the packet with the VLAN ID: D added again is transmitted from the OLT 16 to the L2 / L3 switch 15, and in the L2 / L3 switch 15, the DOCSIS management network 14 that is a transmission destination based on the VLAN ID: D. A packet is sent to

  Similarly, when a DHCP packet is transmitted from the TA 42 b to the CMC 32, the DHCP packet with the VLAN ID: B added is transmitted from the CMC 32 to the D-ONU 31. Then, a packet to which LLID: B corresponding to VLAN ID: B is added is transmitted from the D-ONU 31 to the OLT 16. Further, the packet with the VLAN ID: B added again is transmitted from the OLT 16 to the L2 / L3 switch 15, and the telephone service network 12 which is a transmission destination based on the VLAN ID: B is transmitted in the L2 / L3 switch 15. A packet is sent to

  Similarly, when a DHCP packet is transmitted from the STB 43b to the CMC 32, a DHCP packet to which VLAN ID: C is added is transmitted from the CMC 32 to the D-ONU 31. Then, a packet to which LLID: C corresponding to VLAN ID: C is added is transmitted from the D-ONU 31 to the OLT 16. Further, the packet with the VLAN ID: C added again is transmitted from the OLT 16 to the L2 / L3 switch 15, and the broadcast service network 13 that is a transmission destination based on the VLAN ID: C is transmitted to the L2 / L3 switch 15. A packet is sent to

  Next, a processing sequence of the communication system will be described with reference to FIGS. 5 to 7 are sequence diagrams illustrating processing of the communication system.

  FIG. 5 shows a processing sequence of the communication system 1 when the CM 41 (MAC address: 1111.1111.1111) related to the Internet service and the PC 41x (MAC address: 9999.9999.9999) connected to the CM 41 transmit the DHCP packet. ing. Note that the transmission and reception of the DHCP packet is performed in the IPv4 network.

  First, a DHCP packet (DHCP discover) is transmitted from the CM 41 to the CMC 32 (step S11). The DHCP packet includes Option 60 which is option information, and “docsis” is included as a character string of the option information (with option60 = “docsis ***”). Subsequently, the CMC 32 acquires the VLAN ID: D corresponding to the option information based on the VLAN ID mapping table MT (see FIG. 3), and adds the VLAN ID: D (tagVLAN = D) to the DHCP packet (DHCP discover) Is transmitted to the D-ONU 31 (step S12). In addition, since the MAC address: 1111.1111.1111 of the CM 41 is added to the device information of the VLAN ID mapping table MT, VLAN ID: D is added to all packets received from the CM 41 in subsequent packet transmission / reception.

  Subsequently, a DHCP offer message (DHCP offer) is transmitted from the D-ONU 31 to the CMC 32 (step S13), and further transmitted from the CMC 32 to the CM 41 (step S14). Information on IP addresses that can be used by the CM 41 is notified to the CM 41 by the DHCP offer message. Thereafter, a DHCP request message (DHCP request) requesting an IP address is transmitted from the CM 41 to the D-ONU 31, and a DHCP ack message (DHCP ack) from the D-ONU 31 responding to the DHCP request message is received by the CM 41. Then, the IP address is set according to the request.

  As described above, since the VLAN ID: D is added to the DHCP packet transmitted from the CMC 32 to the D-ONU 31 in step S12, the D-ONU 31 adds the LLID: D corresponding to the VLAN ID: D. The packet can be transmitted to the OLT 16. Since the VLAN ID is associated with the service information in the VLAN ID mapping table MT, the service provided by the communication device 40 that is the transmission source of the packet can be specified between the D-ONUs 31 to the OLT 16.

  Also, a DHCP packet (DHCP discover) is transmitted from the PC 41x to the CMC 32 (step S15). The DHCP packet does not include a character string set as option information (with option60 = unknown or without option60). Subsequently, the VLAN ID: A is acquired by the CMC 32 based on the VLAN ID mapping table MT (see FIG. 3) when the character string set as the option information is not included, and the VLAN ID: A is added ( The tagVLAN = A) DHCP packet (DHCP discover) is transmitted to the D-ONU 31 (step S16). After S16, normal DHCP processing is performed, and the IP address of the PC 41x is set. Since the MAC address of the PC 41x: 9999.9999.9999 is added to the device information in the VLAN ID mapping table MT, VLAN ID: A is added to all packets received from the PC 41x in subsequent packet transmission / reception.

  FIG. 6 shows a processing sequence of the communication system 1 when the CM 42a (MAC address: 1111.1111.1112) and TA 42b (MAC address: 2222.2222.2222) of the EMTA 42 related to the telephone service transmit DHCP packets. Note that the transmission and reception of the DHCP packet is performed in the IPv4 network.

  First, a DHCP packet (DHCP discover) is transmitted from the CM 42a to the CMC 32 (step S21). The DHCP packet includes Option 60 which is option information, and “docsis” is included as a character string of the option information (with option60 = “docsis ***”). Subsequently, the CMC 32 acquires the VLAN ID: D corresponding to the option information based on the VLAN ID mapping table MT (see FIG. 3), and adds the VLAN ID: D (tagVLAN = D) to the DHCP packet (DHCP discover) Is transmitted to the D-ONU 31 (step S22). After S22, normal DHCP processing is performed, and the IP address of the CM 42a is set. Note that since the MAC address: 1111.1111.1112 of the CM 42a is added to the device information in the VLAN ID mapping table MT, VLAN ID: D is added to all packets received from the CM 42a in subsequent packet transmission / reception.

  Also, a DHCP packet (DHCP discover) is transmitted from the TA 42b to the CMC 32 (step S25). The DHCP packet includes Option 60, which is option information, and “pktc” is included as a character string of the option information (with option 60 = “pktc ***”). Subsequently, the CMC 32 acquires the VLAN ID: B corresponding to the option information based on the VLAN ID mapping table MT (see FIG. 3), and adds the VLAN ID: B (tagVLAN = B) to the DHCP packet (DHCP discover) Is transmitted to the D-ONU 31 (step S26). After S26, normal DHCP processing is performed, and the IP address of TA42b is set. Since the MAC address: 2222.2222.2222 of the TA 42b is added to the device information in the VLAN ID mapping table MT, the VLAN ID: B is added to all packets received from the TA 42b in subsequent packet transmission / reception.

  FIG. 7 shows a processing sequence of the communication system 1 when the CM 43a (MAC address: 1111.1111.1113) and STB 43b (MAC address: 333333333.3333) of the CM built-in STB 43 related to the broadcast service transmits a DHCP packet. The DHCP packet transmission / reception is performed in the IPv6 network.

  First, a DHCP packet (DHCPv6 solicit) is transmitted from the CM 43a to the CMC 32 (step S31). The DHCP packet includes Option 16 which is option information, and “docsis” is included as a character string of the option information (with option16 = “docsis ***”). Subsequently, the CMC 32 acquires the VLAN ID: D corresponding to the option information based on the VLAN ID mapping table MT (see FIG. 3), and adds the VLAN ID: D (tagVLAN = D) to the DHCP packet (DHCPv6 solicit) Is transmitted to the D-ONU 31 (step S32). Since the CM 43a MAC address: 1111.1111.1113 is added to the device information in the VLAN ID mapping table MT, VLAN ID: D is added to all packets received from the CM 43a in subsequent packet transmission / reception.

  Subsequently, a DHCP advertisement message (DHCPv6 advertise) is transmitted from the D-ONU 31 to the CMC 32 (step S33), and further transmitted from the CMC 32 to the CM 41 (step S34). Information on IP addresses that can be used by the CM 43a is notified to the CM 43a by the DHCP advertisement message. Thereafter, a DHCP request message (DHCPv6 request) requesting an IP address is transmitted from the CM 43a to the D-ONU 31, and a DHCP ack message (DHCPv6 ack) from the D-ONU 31 responding to the DHCP request message is received by the CM 43a. Then, the IP address is set according to the request.

  Also, a DHCP packet (DHCPv6solicit) is transmitted from the STB 43b to the CMC 32 (step S35). The DHCP packet includes Option 16 which is option information, and “stb” is included as a character string of the option information (with option 16 = “stb ***”). Subsequently, the CMC 32 acquires a VLAN ID: C corresponding to the option information based on the VLAN ID mapping table MT (see FIG. 3), and adds the VLAN ID: C (tagVLAN = B) to the DHCP packet (DHCP solocit) Is transmitted to the D-ONU 31 (step S36). After S36, normal DHCP processing is performed, and the IP address of the STB 43b is set. Since the MAC address: 3333.3333.3333 of the STB 43b is added to the device information in the VLAN ID mapping table MT, VLAN ID: C is added to all packets received from the STB 43b in subsequent packet transmission / reception.

  Next, operational effects of the CMC 32 and the communication system 1 according to the present embodiment will be described in comparison with packet transmission / reception of the communication system 100 according to the comparative example illustrated in FIG. FIG. 8 is a diagram illustrating packet transmission / reception of the communication system according to the comparative example.

  In the communication system 100 according to the comparative example, the CMC 132 transmits a packet (for example, a DHCP packet) received from the communication device 40 to the D-ONU 131 without distinguishing each packet provided by the transmission source communication device 40. Yes. Therefore, in the section from D-ONU 131 to OLT 116, it is impossible to identify which service is the data transmitted from the communication device 40 related to which service, and QoS control according to the service cannot be performed. . In addition, the L2 / L3 switch 115 needs to derive a destination network from the IP address range of the packet received from the OLT 116 and distribute it to an appropriate VLAN ID assigned to each network. Packet distribution is complicated.

  In this regard, in the CMC 32 according to the present embodiment, the device information indicating the transmission source communication device 40 and the service provided by the communication device 40 are indicated based on the packet transmitted from the communication device 40 of each service. Service information is identified. Based on these pieces of information, the control content to be performed when a packet is received from the communication device 40 is determined, control according to the control content is performed, and the packet is transmitted to the D-ONU 31. As a result, the control content is determined according to the service provided by the communication device 40 of the packet transmission source. Since the packet is transmitted to the D-ONU 31 after the control according to the control content is performed, the service provided by the packet transmission source communication device 40 is specified in the D-ONU 31 that has received the packet. can do. For this reason, it is possible to perform QoS control according to the service related to the packet even in the section from the D-ONU 31 to the OLT 16.

  Since a packet that has been controlled according to the service to be provided is transmitted to the L2 / L3 switch 15 via the D-ONU 31 and the OLT 16, the L2 / L3 switch 15 determines the packet transmission source communication device from the control content. The service provided by 40 can be identified, and the network to which packets are distributed can be easily determined.

  Further, the determination unit 324 determines that the VLAN ID, which is an identifier corresponding to the service information, is added to the packet as a control content, and the transmission unit 326 adds the VLAN ID to the packet and then adds the packet after the addition. Transmit to D-ONU 31. Thereby, D-ONU31 which received the packet can specify the service which the communication apparatus 40 of a packet transmission source provides based on VLAN ID. Further, since the service is specified by the VLAN ID, QoS control corresponding to the service related to the packet can be performed even in a configuration in which the number of ports on the D-ONU 31 side is small (for example, 1 port).

  In addition, the CMC 32 includes a storage unit 325 that stores a VLAN ID mapping table MT in which device information, service information, and VLAN ID are associated. The transmission unit 326 converts the VLAN ID into a packet based on the VLAN ID mapping table MT. The packet after the addition is transmitted to the D-ONU 31. By storing such a VLAN ID mapping table MT, transmission processing at the time of packet reception can be performed quickly and easily.

  In addition, the receiving unit 321 receives a DHCP packet from the communication device 40 as a packet from the communication device 40. Option information is included in the DHCP packet, and the service information can be specified from the character string of the option information. Therefore, the service information can be specified reliably.

  The communication system 1 according to the present embodiment is electrically connected to the L2 / L3 switch 15 and the L2 / L3 switch 15 connected to a plurality of networks (communication service network 11 or the like) related to each service provided to the user. The OLT 16 and the D-ONU 31 that performs optical communication with the OLT 16, the plurality of communication devices 40 according to each service provided to the user, and the CMC 32 that is electrically connected to both the D-ONU 31 It is equipped with. The L2 / L3 switch 15 and the OLT 16, and the D-ONU 31 and the CMC 32 are connected by LAN cables C1 and C3, respectively. The CMC 32 and the plurality of communication devices 40 are connected by a coaxial cable C4. Furthermore, the CMC 32 includes a conversion unit 322 that converts a coaxial cable signal related to the packet received by the reception unit 321 into a LAN cable signal related to the packet transmitted by the transmission unit 326. Thereby, in the DOCSIS system using a coaxial cable such as the FTTB configuration of the apartment house facility 20, it is possible to appropriately perform QoS control according to the service related to the packet.

(Second Embodiment)
Next, a communication device and a communication system according to the second embodiment will be described in detail with reference to FIGS. In the description of this embodiment, differences from the above embodiment will be mainly described. FIG. 9 is a diagram illustrating a WAN port mapping table of the communication system according to the second embodiment. FIG. 10 is a diagram illustrating packet transmission / reception using the WAN port mapping table. 11 and 12 are sequence diagrams illustrating processing of the communication system according to the second embodiment.

  In the communication system 1A according to the second embodiment, the mapping information stored in the storage unit 325 of the CMC 32A is the WAN port mapping table WMT shown in FIG. In the WAN port mapping table WMT, instead of the VLAN ID in the VLAN ID mapping table MT (see FIG. 3) of the first embodiment, the WAN port of the CMC 32A includes the source communication device 40, a character string of option information, It is associated with device information (MAC address) and service information.

  The CMC 32A includes at least WAN ports (WAN ports connectable to the D-ONU 31) equal to or more than the number of services that can be provided. Then, the determination unit 324 determines to transmit the packet from the WAN port corresponding to the service information as the control content to be performed when the DHCP packet is received from the communication device 40. The control content is determined based on the WAN port mapping table WMT stored in the storage unit 325.

  As shown in FIG. 9, in the WAN port mapping table WMT, the WAN port 4 is set as the WAN port of the CMC 32A when the CM 41 in which the character string “docsis” of the option information is set is the transmission source. The WAN port 2 is set as the WAN port when the TA 42b in which the character string “pktc” of the option information is set is the transmission source. The WAN port 3 is set as the WAN port when the STB 43b in which the character string “stb” of the option information is set is the transmission source. Furthermore, WAN port 1 is set as the WAN port when the communication device 40 (other communication device 40) having no character string in the option information or having a character string other than the above is the transmission source. Note that the WAN port mapping table WMT is in an initial state in which items other than device information are associated in advance.

  When device information and service information are input from the specifying unit 323, the determination unit 324 refers to the WAN port mapping table WMT stored in the storage unit 325 and acquires the value of the WAN port associated with the input service information. To do. At this time, the determination unit 324 sets (learns) the input device information in the item of device information associated with the input service information in the WAN port mapping table WMT, and updates the WAN port mapping table WMT. . The determination unit 324 determines to transmit the DHCP packet from the acquired WAN port, and inputs the DHCP packet and the value of the WAN port to the transmission unit 326.

  The transmission unit 326 sets the WAN port determined by the determination unit 324 as a transmission port, and then transmits the DHCP packet to the D-ONU 31A. The D-ONU 31A includes at least LAN ports equal to or more than the number of WAN ports of the CMC 32A. The number of D-ONUs 31A is not necessarily one, and a mode in which a plurality of D-ONUs 31A are connected to the CMC 32A and a LAN port of the plurality of D-ONUs 31A is connected to a WAN port of one CMC 32A may be employed. . In this embodiment, there is one D-ONU 31A, the LAN port 1 of the D-ONU 31A is the WAN port 1 of the CMC 32A, the LAN port 2 is the WAN port 2, the LAN port 3 is the WAN port 3, and the LAN port 4 Are electrically connected to the WAN port 4 (see FIG. 10).

  According to such a CMC 32A, the D-ONU 31A that has received the packet can identify the service provided by the communication device 40 that is the packet transmission source, based on the physical port difference. In addition, for example, when the D-ONU 31A has to have a plurality of configurations (for example, when each service is provided by a different provider), a simple configuration in which the physical ports are different is used. It is possible to perform QoS control according to the service.

  As illustrated in FIG. 10, when receiving the DHCP packet from the communication device 40, the CMC 32A transmits the DHCP packet from the WAN port corresponding to the transmission source of the DHCP packet. When the D-ONU 31 receives a packet from the LAN port corresponding to the WAN port of the CMC 32A, the D-ONU 31 adds an LLID corresponding to the LAN port (the WAN port of the CMC 32A) to the packet, and transmits the added packet to the OLT 16. . The OLT 16 converts the VLAN ID corresponding to the LLID, and transmits the packet with the VLAN ID added to the L2 / L3 switch 15. The L2 / L3 switch 15 distributes the packet destination based on the VLAN ID of the packet and performs QoS control according to the VLAN ID.

  For example, when a DHCP packet is transmitted from the PC 41x to the CMC 32, the CMC 32A transmits the DHCP packet from the WAN port 1 to the D-ONU 31A. When the D-ONU 31A receives a packet from the LAN port 1 corresponding to the WAN port 1, the D-ONU 31A transmits a packet to which the LLID: A corresponding to the LAN port 1 is added to the OLT 16. Further, the packet with the VLAN ID: A corresponding to LLID: A is transmitted from the OLT 16 to the L2 / L3 switch 15, and the L2 / L3 switch 15 transmits the packet at the destination based on the VLAN ID: A. A packet is transmitted to a certain communication service network 11.

  Similarly, when a DHCP packet is transmitted from the CM 41, 42a, 43a to the CMC 32, the CMC 32A transmits the DHCP packet from the WAN port 4 to the D-ONU 31A. When the D-ONU 31A receives a packet from the LAN port 4 corresponding to the WAN port 4, the D-ONU 31A transmits a packet to which the LLID: D corresponding to the LAN port 4 is added to the OLT 16. Further, a packet with a VLAN ID: D corresponding to LLID: D is transmitted from the OLT 16 to the L2 / L3 switch 15, and the L2 / L3 switch 15 transmits a packet based on the VLAN ID: D. A DHCP packet is transmitted to a certain DOCSIS management network 14.

  Similarly, when a DHCP packet is transmitted from the TA 42b to the CMC 32, the CMC 32A transmits the DHCP packet from the WAN port 2 to the D-ONU 31A. When the D-ONU 31A receives a packet from the LAN port 2 corresponding to the WAN port 2, the D-ONU 31A transmits a packet to which the LLID: B corresponding to the LAN port 2 is added to the OLT 16. Further, a packet with a VLAN ID: B corresponding to LLID: B is transmitted from the OLT 16 to the L2 / L3 switch 15, and the L2 / L3 switch 15 transmits a packet based on the VLAN ID: B. A DHCP packet is transmitted to a certain telephone service network 12.

  Similarly, when a DHCP packet is transmitted from the STB 43b to the CMC 32, the CMC 32A transmits the DHCP packet from the WAN port 3 to the D-ONU 31A. When the D-ONU 31 </ b> A receives a packet from the LAN port 3 corresponding to the WAN port 3, the D-ONU 31 </ b> A transmits a packet with LLID: C corresponding to the LAN port 3 to the OLT 16. Further, a packet with a VLAN ID: C corresponding to LLID: C is transmitted from the OLT 16 to the L2 / L3 switch 15, and the L2 / L3 switch 15 transmits a packet based on the VLAN ID: C. A DHCP packet is transmitted to a certain broadcast service network 13.

  Next, a processing sequence of the communication system 1A will be described with reference to FIGS.

  FIG. 11 shows a processing sequence of the communication system 1 when the CM 41 (MAC address: 1111.1111.1111) and the PC 41x (MAC address: 9999.9999.9999) connected to the CM 41 transmit a DHCP packet. Note that the transmission and reception of the DHCP packet is performed in the IPv4 network.

  First, a DHCP packet (DHCP discover) is transmitted from the CM 41 to the CMC 32A (step S41). The DHCP packet includes Option 60 which is option information, and “docsis” is included as a character string of the option information (with option60 = “docsis ***”). Subsequently, the WAN port 4 corresponding to the option information is acquired by the CMC 32A based on the WAN port mapping table WMT, and a DHCP packet (DHCP discover) is transmitted from the WAN port 4 to the D-ONU 31A (step S42). ). Note that since the MAC address of the CM 41: 1111.1111.1111 is added to the device information in the WAN port mapping table WMT, all packets received from the CM 41 are transmitted from the WAN port 4 in subsequent packet transmission / reception.

  Subsequently, a DHCP offer message (DHCP offer) is transmitted from the D-ONU 31A to the CMC 32A (step S43), and further transmitted from the CMC 32A to the CM 41 (step S44). Information on IP addresses that can be used by the CM 41 is notified to the CM 41 by the DHCP offer message. Thereafter, a DHCP request message (DHCP request) requesting an IP address is transmitted from the CM 41 to the D-ONU 31A, and a DHCP ack message (DHCP ack) from the D-ONU 31A responding to the DHCP request message is received by the CM 41. Then, the IP address is set according to the request.

  Also, a DHCP packet (DHCP discover) is transmitted from the PC 41x to the CMC 32 (step S45). The DHCP packet does not include a character string set as option information (with option60 = unknown or without option60). Subsequently, the WAN port 1 when the character string set as the option information is not included is acquired by the CMC 32A based on the WAN port mapping table WMT, and the DHCP packet (from the WAN port 1 to the D-ONU 31A ( DHCP discover) is transmitted (step S46). After S46, normal DHCP processing is performed, and the IP address of the PC 41x is set. Since the MAC address of the PC 41x: 9999.9999.9999 is added to the device information in the WAN port mapping table WMT, all packets received from the PC 41x are transmitted from the WAN port 1 in subsequent packet transmission / reception.

  FIG. 12 shows the processing sequence of the communication system 1 when the CM 41 (MAC address: 1111.1111.1111) and the PC 41x (MAC address: 9999.9999.9999) connected to the CM 41 transmit DHCP packets, as in FIG. However, unlike FIG. 11, an example is shown in which DHCP packet transmission / reception is performed in the Ipv6 network.

  First, a DHCP packet (DHCPv6 solicit) is transmitted from the CM 41 to the CMC 32A (step S51). The DHCP packet includes Option 16 which is option information, and “docsis” is included as a character string of the option information (with option16 = “docsis ***”). Subsequently, the WAN port 4 corresponding to the option information is acquired by the CMC 32A based on the WAN port mapping table WMT, and a DHCP packet (DHCPv6 solicit) is transmitted from the WAN port 4 to the D-ONU 31A (step S52). ).

  Subsequently, a DHCP advertisement message (DHCPv6 advertise) is transmitted from the D-ONU 31A to the CMC 32A (step S53), and further transmitted from the CMC 32A to the CM 41 (step S54). Information on IP addresses that can be used by the CM 41 is notified to the CM 41 by the DHCP advertisement message. Thereafter, a DHCP request message (DHCPv6 request) requesting an IP address is transmitted from the CM 41 to the D-ONU 31A, and a DHCP ack message (DHCPv6 ack) from the D-ONU 31A in response to the DHCP request message is received by the CM 41. Then, the IP address is set according to the request.

  Further, a DHCP packet (DHCPv6 solicit) is also transmitted from the PC 41x to the CMC 32 (step S55). The DHCP packet does not include a character string set as option information (with option16 = unknown or without option16). Subsequently, the WAN port 1 when the character string set as the option information is not included is acquired by the CMC 32A based on the WAN port mapping table WMT, and the DHCP packet (from the WAN port 1 to the D-ONU 31A ( DHCP discover) is transmitted (step S56). After S56, normal DHCP processing is performed, and the IP address of the PC 41x is set.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, although a communication system that performs data communication using the DOCSIS method has been described as an example, the communication system is not limited thereto, and may be a communication system used in other FTTH configurations.

DESCRIPTION OF SYMBOLS 1,1A ... Communication system, 15 ... L2 / L3 switch, 16 ... OLT, 31, 31A ... D-ONU, 32, 32A ... CMC, 40 ... Communication equipment, 321 ... Receiver, 322 ... Converter, 323 ... Specific Unit, 324 ... determination unit, 325 ... storage unit, 326 ... transmission unit, MT ... VLAN ID mapping table, WMT ... WAN port mapping table.

Claims (7)

A communication device electrically connected to both a plurality of communication devices related to each service provided to a user, and a first optical line termination device that transmits packets from the communication device to a host device by optical communication Because
Receiving means for receiving a packet for address acquisition from the communication device;
Identifying means for identifying device information indicating a communication device of a transmission source of the packet and service information indicating a service provided by the communication device of the transmission source included in the packet;
Determining means for determining control contents to be performed when a packet is received from a communication device indicated by the device information based on the device information and the service information;
And a transmission unit that performs control according to the control content and transmits the packet to the first optical network unit. The determining means determines to add an identifier according to the service information to the packet as the control content,
The communication apparatus according to claim 1, wherein the transmission unit transmits the packet to the first optical network unit after adding the identifier to the packet. The communication device further includes at least a number of WAN ports connectable to the first optical line termination device equal to or more than the number of services.
The determining means determines to transmit the packet from the WAN port according to the service information as the control content,
3. The communication apparatus according to claim 1, wherein the transmission unit transmits the packet to the first optical network unit after setting the WAN port corresponding to the service information as a transmission port of the packet. The communication device further includes storage means for storing mapping information that associates the device information, the service information, and the control content,
The communication device according to any one of claims 1 to 3, wherein the transmission unit performs control based on the mapping information and transmits the packet to the first optical line termination device.   The communication device according to claim 1, wherein the reception unit receives a DHCP packet from the communication device as a packet from the communication device. A switch unit connected to a plurality of networks related to each service provided to the user;
A second optical line terminator electrically connected to the switch unit;
A first optical line terminator that performs optical communication with the second optical line terminator;
A plurality of communication devices related to each service provided to a user, and a communication device electrically connected to both of the first optical line termination device,
The communication device
Receiving means for receiving a packet for address acquisition from the communication device;
Identifying means for identifying device information indicating a communication device of a transmission source of the packet and service information indicating a service provided by the communication device of the transmission source included in the packet;
Determining means for determining control contents to be performed when a packet is received from a communication device indicated by the device information based on the device information and the service information;
And a transmission unit that performs control according to the control content and transmits the packet to the first optical network unit. The switch unit and the second optical line terminator, and the first optical line terminator and the communication device are each connected by a LAN cable,
The communication device and the plurality of communication devices are connected by a coaxial cable,
The communication device further includes conversion means for converting the signal for the coaxial cable related to the packet received by the reception means into the signal for the LAN cable related to the packet transmitted by the transmission means. Communication system.

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