CN105634824A - Method and system for shunting HFC network signals by using multi-Ethernet port cable modem - Google Patents
Method and system for shunting HFC network signals by using multi-Ethernet port cable modem Download PDFInfo
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- CN105634824A CN105634824A CN201610049456.6A CN201610049456A CN105634824A CN 105634824 A CN105634824 A CN 105634824A CN 201610049456 A CN201610049456 A CN 201610049456A CN 105634824 A CN105634824 A CN 105634824A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
Abstract
The invention discloses a method and system for shunting HFC network signals by using a multi-Ethernet port cable modem. Multiple uplink/downlink logic channels can be set through configuring the cable modem and a coaxial-cable media converter; VLAN labels are inserted for Ethernet frames; the packages of different VLAN labels are distributed to associated logic channels for downlink transmission; the packages flowed from different Ethernet ports are distributed to appointed logic channels for uplink transmission; and therefore, when broadcasting and television operators deploy services, specific service flows and the signal flows of other services can be isolated.
Description
Technical field
The invention belongs to cable communicating technology field, be specifically related to the signal shunting of hfc plant.
Background technology
The CM(CableModem of radio and television carrier network, cable modem is accessed by cable tv coax) generally only provide the user an Ethernet interface and communicate. If user has multiple terminal network appliance, it is necessary to the network equipment such as configuration switch, router extension network interface is to realize radio and TV operator's service and online simultaneously. Even if extension network interface; all of communication bandwidth essence still shares unique Ethernet interface on CM; when using IPSTB (InternetProtocolSet-topBox; IP Set Top Box), VOIP(VoiceoverInternetProtocol; the networking telephone) etc. operator need service flow to be protected time; the CM of above-mentioned single face can not meet device requirement, and service flow needs the signal stream contention bandwidth with the other-end network equipment. Once other equipment of user carry out the operation of pole consumption bandwidth, for instance run a sudden peal of thunder, use service flow will run into card simultaneously. Even if operator is the service flow independent bandwidth of distribution, but the IP distributed with generic terminal devices signal stream due to service flow is at the same network segment, and other network users are openly visible by information, are unsatisfactory for the index of the high security of radio and TV operator.
Summary of the invention
It is an object of the invention to the problem of signal shunting during Broadcast and TV system multi-service is disposed that solves.
For achieving the above object, the present invention provides a kind of method that hfc plant signal taps, cable network includes coaxial cable medium converter and the cable modem of coupling, cable modem includes the Ethernet interface that at least two is external, the method includes the configuration file setting cable modem, and described configuration file includes:
Set up logical channel quantity and downlink logical number of channels;
Definition is for the up of different described Ethernet interfaces and downlink logical bandwidth chahnel;
Defining classification device, to mail to, by the up package that different Ethernet interfaces flow into, the up logical channel being associated;
Wherein, up logical channel at least two, downlink logical passage at least two.
As the further improvement of an embodiment of the present invention, different Ethernet interfaces are specified different up logical channels by configuration file.
Further improvement as an embodiment of the present invention, configuring coaxial cable medium converter, so that coaxial cable medium converter: associate downlink logical passage for VLAN tag, make coaxial cable medium converter that the package with VLAN tag received to import transmission in the downlink logical passage being associated; Before package is imported downlink logical passage, remove VLAN tag.
As the further improvement of an embodiment of the present invention, the package with difference VLAN tag is distributed to different downlink logical passages by coaxial cable medium converter.
Further as an embodiment of the present invention is improved, configuring coaxial cable medium converter, so that coaxial cable medium converter: for the up logical channel distribution VLAN tag being connected with modem; The package received from modem is inserted the VLAN tag distributed.
As the further improvement of an embodiment of the present invention, cable network also includes and the Metropolitan Area Network (MAN) switch of coaxial cable medium converter coupling, Metropolitan Area Network (MAN) switch configuration at least two VLANID.
For achieving the above object, an embodiment of the present invention provides the system of a kind of hfc plant signal shunting, including the cable modem coupled with coaxial cable medium converter respectively and Metropolitan Area Network (MAN) switch, system can be configured to perform any of the above-described described method.
As the further improvement of an embodiment of the present invention, cable modem can be module or be autonomous device.
As the further improvement of an embodiment of the present invention, cable modem includes the Ethernet interface that at least two is external.
As the further improvement of an embodiment of the present invention, cable modem include CPU, CPU can according to the configuration file recognition classifier of cable modem, so that the up package that different described Ethernet interfaces flow into is mail to the up logical channel being associated.
Compared with prior art, use Multi-netmouth cable modem provided by the invention carries out the method and system of hfc plant signal shunting, makes radio and TV operator when deployment services, it is possible to the signal stream of isolation special services stream and other business.
Accompanying drawing explanation
Fig. 1 is the structural representation of hfc plant signal separate system one embodiment of the present invention;
Fig. 2 is the structural representation of the cable modem in an embodiment of the present invention with VLAN switch;
Fig. 3 is the structural representation of cable modem in a further embodiment of this invention.
Detailed description of the invention
Describe the present invention below with reference to detailed description of the invention shown in the drawings. But these embodiments are not limiting as the present invention, those of ordinary skill in the art is all contained in protection scope of the present invention according to the made structure of these embodiments, method or conversion functionally.
With reference to Fig. 1, the cable network of the present invention includes CMC(CoaxMediaConverter, coaxial cable medium converter at local side), CMC serves the CM group with multiple CM user. CMC is by coax network and the coupling of CM group. CM can be module or autonomous device, is connected with IPSTB and other network equipments by the Ethernet interface (LAN) being arranged on CM.
As it is shown in figure 1, the cable network of the present invention also includes NMS(office side network management system at local side) server and Metropolitan Area Network (MAN) switch. CMC is by optical fiber or gigabit ethernet link and the coupling of Metropolitan Area Network (MAN) switch, this Metropolitan Area Network (MAN) switch and NMS server coupling. Metropolitan Area Network (MAN) switch is also coupled to broadband services service network.
Metropolitan Area Network (MAN) switch, CMC and CM form HFC(hybred fiber-coax cable by described coupling mode) network. Wherein, using EoC technology on coax network couples, described EoC technology is such as DOCSIS. On the coaxial cable cross-line of hfc plant, CMC provides flow scheduling by distributing time slot (timeslot) to CM, and is gathered on Metropolitan Area Network (MAN) switch by the flow from CM.
In an embodiment of the present invention, the configuration mode that Metropolitan Area Network (MAN) switch is supported by figure or Command Line Interface or other this switches, configuration at least two 802.1QVLANID, ID range for 0 ~ 4095, wherein 0 and 4095 are retained by operator, not for user. VLANID is such as VLAN10 and VLAN20, and 10 and 20 represent the ID of VLAN respectively. Wherein, at least one VLAN deployment services is in the resource of broadband access network business, such as PPPoE(PointtoPointProtocoloverEthernet, based on the point-to-point protocol of Ethernet) server, DNS(DomainNameSystem, domain name system) server, advanced router etc. Meanwhile, at least one VLAN deployment services is in the resource of service flow business, for instance DHCP(DynamicHostConfigurationProtocol, DHCP) server, streaming media server etc.
In advance coax network is configured between CMC and CM the logical channel in some uplink and downlink directions by CM configuration file. These logical channels can be independently operated, and can be set different attributes by CM configuration file, for instance different bandwidth chahnel, priority level etc. CM configuration file is downloaded from the tftp server of local side when starting by CM, as the foundation that CM duty sets. Tftp server belongs to the ingredient of office side NMS. The NMS system of broad sense also comprises DNS(DomainNameSystem, domain name system), DHCP, ACS(AccessControlServer, access control server), the server of the various different purposes such as Radius.
CMC equipment configures through order line, down direction, enters the descending package with VLAN tag of CMC from Metropolitan Area Network (MAN) switch, can be sent by the appointment down going channel between purpose CM by CMC. The package with different VLAN tag enters different downlink logical passages.
CM receives the data packet with VLAN tag from the descending transmission of CMC end, VLAN switch (VLANSwitch) built-in for CM process. VLAN switch removes (untag) VLAN tag from ethernet frame, is sent from the corresponding Ethernet interface of CM by the package without VLAN tag obtained. VLAN switch, before carrying out this process, has been carried out corresponding configuration by CM, and required configuration is provided by CM configuration file. Package owing to flowing out from the Ethernet interface of CM is the common ethernet format package without VLAN tag, all types of network equipments that downstream connects, and such as IPSTB, VOIP equipment, computer, mobile phone, namely do not need to upgrade can process this package.
VLAN switch built-in for CM may identify which that ID ranges for the VLAN of 0 ~ 4095. In order to be able to the package allowing VLAN switch processes with particular vlan label, VLAN switch is programmed processing by CM by MDIO interface, so that VLAN switch carries out described package process. CM provides multiple man-machine interface for configuration VLANID, for instance GUI, MIB and VendorTLV etc. By MIB and VendorTLV, operator can set and revise the concrete numbering of VLANID in CM configuration file.
Up direction, CM Ethernet interface (LAN mouth) package flowed into, is so-called up package. The package flowed into from Ethernet interface is the common Ethernet package without VLAN tag, and VLAN switch inserts VLAN tag in the ethernet frame of described package, is sent to CMCPU.
Further, CM includes at least two Ethernet interface to be connected with external equipment. The Ethernet interface that the VLAN tag that VLAN switch inserts in ethernet frames flows into corresponding to this package. From the package that different Ethernet interfaces flow into, VLAN switch inserts different VLAN tag.
CMCPU receives the package with VLAN tag from VLAN switch and carries out the examination of VLAN tag, according to CM configuration file, the specified upstream logical channel distributed, the package with particular vlan label is dealt into CMC.
CMC receives the package uploaded by source CM, is directly forwarded to Metropolitan Area Network (MAN) switch.
Metropolitan Area Network (MAN) switch receives the CMC package uploaded, and VLAN tag is screened, the package with VLAN tag is forwarded to the VLAN network segment corresponding to label respectively. Package is from before Metropolitan Area Network (MAN) switch produces, and VLAN tag is removed.
SoC(System-on-a-Chip, system level chip is included) with reference to Fig. 2, CM. SoC includes the MAC function of CPU, Docsis agreement and the PHY function of Docsis agreement. Further, the interface that SoC configuration is abundant, it is possible to be electrically connected the system that composition is required with external devices.
CM also includes and the VLAN switch (VLANSwitch) of SoC coupling, and in Fig. 2, WAN mouth is the upper united mouth (uplink) that VLAN switch is connected with SoC. After VLAN switch has configured, WAN mouth becomes the VLANTrunk mouth (trunking) of this VLAN switch. VLAN switch has some Ethernet interfaces (LAN) to couple with downstream network device.
CM also includes and the read/write memory medium of SoC coupling, for instance can be ROM(Read-OnlyMemory, read-only store-memory body) or RAM(RandomAccessMemory, random store-memory body). RAM provides address space, ROM for CPU computing, for instance the Flash shown in Fig. 2 provides program and data space for system.
CM also includes homodromy (Diplexer) and electronics frequency modulation head (SiliconTuner). In other embodiments, homodromy and electronics frequency modulation head can be integrated in CPU.
CM is connected with coax network by F-connector (F-connector), and F-connector couples with homodromy.
Descending Docsis protocol signal works in 91MHz frequencies above, homodromy will be above the signal of 91MHz and separates from coaxial cable, sending into electronics frequency modulation head, high-frequency signal is changed into suitable intermediate-frequency IF signal (30 ~ 40MHz) and sends into SoC process by electronics frequency modulation head. SoC receives the intermediate-freuqncy signal of Docsis agreement, and its CPU utilizes PHY part and MAC part that Docsis protocol data is processed, and releases Docsis message, solves user data and convert the common Ethernet package comprising this user data to. Described Ethernet package is sent to VLAN switch by WAN mouth by SoC. VLAN switch removes VLAN tag from ethernet frame, is sent from corresponding Ethernet interface by the common ethernet format package without VLAN tag obtained.
For realizing the present invention, it is necessary to the configuration file of CM is set. CM follows Docsis agreement, uses other Data Transport Protocols such as TFTP agreement or HTTP, obtain the configuration file of CM from local side, comprise the setting item to CM in configuration file in upper line process. Implement in the configuration file of the present invention, at least need to set:
Downlink logical number of channels;
Up logical channel quantity;
Define the uplink and downlink logical channel bandwidth for different VLANID. Wherein, being allocated for the uplink and downlink logical channel providing broadband access network service, bandwidth can be determined according to the broadband service SLA grade of user; Being allocated for the uplink and downlink logical channel providing special service stream, bandwidth can be determined according to this service desire bandwidth required, for instance descending for the open 4M of SD HD Set Top Box, 1M is up; Descending for the open 8M of high definition SD Set Top Box, 2M is up;
Specify different VLANID for each Ethernet interface, so that VLAN switch is according to setting, the ethernet frame entering each Ethernet interface is inserted the VLAN tag that definition is required, and, the Ether frame sent from each Ethernet interface is removed VLAN tag.
Defining classification device (Classifier), so that the up package with VLAN tag is mail to corresponding up logical channel by CPU.
Except above-mentioned setting, CM configuration file also comprises other basic configuration ensureing CM normal operation, for instance MACCPE quantity etc.
For realizing the present invention, in addition it is also necessary to configuration CMC, so that CMC performs following steps:
Downlink logical passage is associated, so that the package with VLAN tag received from Metropolitan Area Network (MAN) switch is imported transmission in the downlink logical passage being associated by CMC for VLAN tag.
The present embodiment not with in CM configuration file to downlink logical passage defining classification device for necessity. Can realize the package of different VLAN tag is distributed to different downlink logical passages as it was previously stated, CMC carries out configuration. Should be understood that, read the technical staff of this patent by this patent education and inspiration, should appreciate that, association between package and certain downlink logical passage of certain descending VLAN tag, in like manner can being obtained by the previously described technology being applied to up direction, not this patent does not cover this kind of enforcement.
In one embodiment, Metropolitan Area Network (MAN) switch configures two 802.1QVLANID:VLAN10 and VLAN20. According to Docsis agreement, CM uses CM configuration file to register to CMC. After having registered, set up the up logical channel (such as three up logical channels and three downlink logical passages) according to CM configuration file requirement between CM and CMC, and distribute bandwidth to each uplink and downlink logical channel. Wherein, up logical channel 1 and downlink logical passage 1 ' are for Docsis management agreement and operator's NMS passage, and up logical channel 2 and downlink logical passage 2 ' are for VLAN10, and up logical channel 3 and downlink logical passage 3 ' are for VLAN20.
Down direction, the Ether frame without VLAN tag of VLAN10 enters Metropolitan Area Network (MAN) switch, and Metropolitan Area Network (MAN) switch is the label of its insertion VLAN10, then passes through the high speed data link such as optical fiber or gigabit Ethernet and is issued to CMC. CMC receives the Ether frame with VLAN10 label, first purpose cm device is inquired about according to target MAC (Media Access Control) address (DA), then it is 10 according to VLAN tag, the downlink logical passage 2 ' assigning it to associate with purpose CM is transmitted, then this Ether frame is put in the transmit queue of downlink logical passage 2 ' by CMC, is sent to purpose CM by downlink logical passage 2 '. Similarly, the Ether frame of VLAN20 is sent to purpose CM by downlink logical passage 3 ' after Metropolitan Area Network (MAN) switch and CMC, does not repeat at this. If enter the Ether frame of CMC both without VLAN10 without there being VLAN20 label, then sent to purpose CM by downlink logical passage 1 '.
Purpose CM at least includes the first Ethernet interface LAN1 and the second Ethernet interface LAN2. Purpose CM receives descending package from CMC, unpacks through DocsisPHY, DocsisMAC and removes Docsis header, it is thus achieved that with the package of VLAN tag, CPU be sent to the WAN mouth of VLAN switch by WAN mouth. VLAN switch receives the ethernet frame with VLAN tag from WAN mouth, and according to CM configuration file, VLAN switch removes VLAN tag, if the package of VLAN10, is then forwarded to LAN1, if the package of VLAN20 is then forwarded to LAN2. Herein, the ethernet frame being free from VLAN tag of LAN mouth it is forwarded to.
Up direction, CM configuration file sets VLAN switch and sets up VLAN10, and WAN mouth and LAN1 are set as the member port of VLAN10. Package is carried out uplink by LAN1, is inserted simultaneously into VLAN10 label. Package is only carried out uplink by WAN mouth, does not carry out label and removes. This configuration file concurrently sets VLAN switch and sets up VLAN20, and WAN mouth and LAN2 are set as the member port of VLAN20. Package is carried out uplink by LAN2, is inserted simultaneously into VLAN20 label. Package is only carried out uplink by WAN, does not carry out label and removes.
CM configuration file also defines the first grader and the second grader, makes CPU recognition classifier when package is dispatched. Ethernet package with VLAN tag is sent into CPU by VLAN switch from WAN mouth. The CPU setting according to the first grader, sends into the up package with VLAN10 label the transmission queue of up logical channel 2, through the process of DocsisMAC and DocsisPHY, labelling Dcosis header, and is sent to CMC through up logical channel 2. Similarly, the CPU setting according to the second grader, the up package of VLAN20 label is sent to the transmission queue of up logical channel 3, after labelling Docsis header, is sent to CMC. If sending into the up package of CPU both without VLAN10 label, without there being VLAN20 label, being then sent to the transmission queue of up logical channel 1, after labelling Docsis header, being sent to CMC.
CMC receives from Docsis frame up for source CM, releases the Docsis header of frame, solves the Ether frame with VLAN tag. Then, CMC transmits this Ether frame to Metropolitan Area Network (MAN) switch by the high speed data link such as optical fiber or gigabit Ethernet. After Metropolitan Area Network (MAN) switch identification VLANID, remove VLAN tag, forward ethernet frame to the VLAN of correspondence.
In still another embodiment of the process, Metropolitan Area Network (MAN) switch configuration at least two 802.1QVLANID, ID range for 0 ~ 4095, and wherein 0 and 4095 are retained by operator, not for user. Wherein, the network design of at least one VLANID serves the resource of broadband access network business, such as PPPoE(PointtoPointProtocoloverEthernet, point-to-point protocol based on Ethernet) server, DNS(DomainNameSystem, domain name system) server, advanced router etc. Meanwhile, the network design of at least one VLANID serves the resource of service flow business, for instance DHCP(DynamicHostConfigurationProtocol, DHCP) server, streaming media server etc.
In advance coax network is configured between CMC and CM the logical channel in some uplink and downlink directions by CM configuration file. These logical channels can be independently operated, and can be set different attributes by CM configuration file, for instance different bandwidth chahnel, priority level etc. CM configuration file is downloaded from the tftp server of local side when starting by CM, as the foundation that CM duty sets. Tftp server belongs to the ingredient of office side NMS. The NMS system of broad sense also comprises DNS(DomainNameSystem, domain name system), DHCP, ACS(AccessControlServer, access control server), the server of the various different purposes such as Radius.
Configuration CMC, make at down direction, the descending package with VLAN tag of CMC is entered from Metropolitan Area Network (MAN) switch, can be sent by the appointment down going channel between purpose CM by CMC, and, CMC sends package to, before CM, removing VLAN tag, so that what CM received is the common package without VLAN tag. In other examples, it is possible to share a downlink logical passage and be transmitted, correspondingly, same bandwidth is shared.
CM receives the general data package sended over from CMC end, does not carry out any special handling, and the descending package that Different Logic passage flows into is mail to corresponding Ethernet interface. CM at least includes two Ethernet interfaces (LAN) to be connected with upstream device, and each Ethernet interface is corresponding with specific logical channel. Specifically, CMCPU is according to ARP table and N2M(Net2Media) descending package is addressed by table, and according to addressing results, package is emitted to downstream network device from corresponding Ethernet interface. Wherein, ARP table is the CM technology determining conversion IP address to MAC address; N2M table is the CM technology determining have access to special MAC from which network interface. Adopt these technical noteses when package enters CM, CM from arbitrary network interface or update MAC Address, incidence relation between IP address and network interface.
Up direction, each Ethernet interface of CM the up package flowed into is all without VLAN tag. According to the physical interface that package flows into, CM may determine that it is originated, and the package that this Ethernet interface flows into is sent out distribution to the up logical channel being associated to send to CMC.
The CMC package to obtaining from the up logical channel of source CM inserts the VLAN tag corresponding with passage, is then sent to Metropolitan Area Network (MAN) switch. Specifically, after CMC is completed registration by CM, CMC knows the every Connecting quantity between the CM of this source, including the SID(ServiceIdentifier of source CM each the up logical channel used, service identifier). SID is unique mark of up logical channel between CM and CMC, is distributed to the CM up logical channel used by CMC. CMC broadcasts (Broadcast) MAP message in downlink logical passage, and the uplink information of the cm device on all of Docsis network of unified management sends the time slot (timeslot) of time. Such as, the SID of one of them up logical channel that purpose CM uses is m, in MAP message, is associated with SID=m by a certain section of time slot. After purpose CM obtains this association from MAP message, send from corresponding up logical channel at this section of time slot and be classified device and be placed in the information of this passage upstream queue to CMC. Owing to Docsis network is that whole network synchronizes, it is possible to accurately judging described time slot by which up logical channel of source CM is taken, the upstream data now collected must come from a certain specified upstream logical channel of source CM. The up package of up logical channel is inserted the VLAN tag specified according to configuration by CMC.
Metropolitan Area Network (MAN) switch receives the CMC package uploaded, and VLAN tag is screened, and the package with VLAN tag is forwarded to the network segment of correspondence respectively. Package is from before Metropolitan Area Network (MAN) switch produces, and VLAN tag is removed.
Include SoC, SoC with reference to Fig. 3, CM and include the MAC function of CPU, Docsis agreement and the PHY function of Docsis agreement. Further, the interface that SoC configuration is abundant, it is possible to be electrically connected the system that composition is required with external devices. Described interface includes some Ethernet interfaces (LAN).
CM also includes and the read/write memory medium of SoC coupling, for instance can be ROM or RAM. ROM such as can for the Flash shown in Fig. 3.
CM also includes homodromy and electronics frequency modulation head, and it can be illustrated in figure 3 independent module, it is also possible to is integrated in CPU.
CM is connected with coax network by F-connector. F-connector and homodromy coupling.
SoC receives the intermediate-freuqncy signal of Docsis agreement, and its CPU utilizes PHY part and MAC part that Docsis protocol data is processed, and releases Docsis heading, finally solves user data and convert the common Ethernet package comprising this user data to. Described Ethernet package is sent to each terminal unit plugged into by SoC by Ethernet interface.
Implement in the CM configuration file of the present invention, at least need to set:
Downlink logical number of channels;
Up logical channel quantity;
Define the uplink and downlink logical channel bandwidth for different Ethernet interfaces. Wherein, at least one Ethernet interface is allocated for the uplink and downlink logical channel providing broadband access network service, and bandwidth is determined according to the broadband service SLA grade of user; At least one Ethernet interface is allocated for the uplink and downlink logical channel providing IPSTB business service, and bandwidth is determined according to this service desire bandwidth required;
Defining classification device, so that the up package that different Ethernet interfaces flow into is mail to the up logical channel being associated by CPU.
Except above-mentioned setting, CM configuration file also comprises other basic configuration ensureing CM normal operation, for instance MACCPE quantity etc.
Further, the definition of grader can be used CMIM(CableModemInterfaceMask, cable modem interface mask), to carry out the examination of Ethernet interface, or use self-defining other modes such as TLV43 of manufacturer to screen.
For realizing the present invention, in addition it is also necessary to configuration CMC, so that CMC performs following steps:
Downlink logical passage is associated, so that the package with VLAN tag received from Metropolitan Area Network (MAN) switch is imported transmission in the downlink logical passage being associated by CMC for VLAN tag;
Before package is imported downlink logical passage, remove VLAN tag;
For the up logical channel distribution VLAN tag being connected with purpose CM;
The package received from CM is inserted the VLAN tag distributed.
The present embodiment not with in CM configuration file to downlink logical passage defining classification device for necessity. Can realize the package of different VLAN tag is distributed to different downlink logical passages it should be appreciated that CMC carries out suitable configuration. Read the technical staff of this patent by this patent education and inspiration, should appreciate that, association between package and certain downlink logical passage of certain descending VLAN tag, it is possible in like manner obtained by the mentioned above technology being applied to up direction, not this patent does not cover this kind of enforcement.
In one embodiment, Metropolitan Area Network (MAN) switch configures two 802.1QVLANID:VLAN10 and VLAN20. According to Docsis agreement, CM uses described configuration file to register to CMC. After having registered, set up the up logical channel (such as three up logical channels and three downlink logical passages) according to CM configuration file requirement between CM and CMC, and distribute bandwidth to each uplink and downlink logical channel. Wherein, up logical channel 1 and downlink logical passage 1 ' are for Docsis management agreement and operator's NMS passage, and up logical channel 2 and downlink logical passage 2 ' are for VLAN10, and up logical channel 3 and downlink logical passage 3 ' are for VLAN20.
Down direction, the Ether frame without VLAN tag of VLAN10 enters Metropolitan Area Network (MAN) switch, and Metropolitan Area Network (MAN) switch is the VLAN tag of its insertion VLAN10, then passes through optical fiber or gigabit ethernet link is issued to CMC. CMC receives the Ether frame with VLAN10 label, first target cm device is inquired according to target MAC (Media Access Control) address (DA), then it is 10 according to VLAN tag, determine to use the downlink logical passage 2 ' associated with this CM to be transmitted, now, CMC removes the VLAN tag of this Ether frame, then is put into by this Ether frame in the transmit queue of downlink logical passage 2 ', sends to purpose CM. Similarly, the Ether frame of VLAN20, after Metropolitan Area Network (MAN) switch and CMC, is removed VLAN tag, then passes through downlink logical passage 3 ' and sends to purpose CM, does not repeat at this. If enter the Ether frame of CMC both without VLAN10 without there being VLAN20 label, then sent to purpose CM by downlink logical passage 1 '.
Purpose CM receives descending package from CMC, unpacks through DocsisPHY, DocsisMAC and removes Docsis header, it is thus achieved that without the package of VLAN tag. CMCPU is according to ARP table and N2M(Net2Media) table is addressed, and according to addressing results, the descending package received from downlink logical passage 2 ' is sent to upstream device from LAN1, the descending package received from downlink logical passage 3 ' is sent to upstream device from LAN.
Up direction, CM configuration file defines the first grader and the second grader, make CPU recognition classifier when package is dispatched, and the setting according to the first grader, the up package of the first Ethernet interface LAN1 is sent to the transmit queue of up logical channel 2, setting according to the second grader, is sent to the transmit queue of up logical channel 3 by the up package of the second Ethernet interface LAN2. If the up package sending into CPU neither comes from the first Ethernet interface LAN1 and also do not come from the second Ethernet interface LAN2, then it is sent to the transmission queue of up logical channel 1.
CMC receives from Docsis frame up for CM, it is judged that be which the up logical channel from purpose CM receives. If receiving from the up logical channel 2 of purpose CM, then Docsis frame head is removed, solve Ether frame, then configure according to CMC, this Ether frame is inserted the label of VLAN10, sends this Ether frame with VLAN tag to Metropolitan Area Network (MAN) switch by optical-fibre channel or gigabit Ethernet. Same process from the up Docsis frame of up logical channel 3, and transfer the Ether frame with VLAN20 label to, be sent to Metropolitan Area Network (MAN) switch by high-speed link.
From the Docsis frame that up logical channel 1 receives, this official holiday sets the NMS network of operator and is not divided into particular vlan, therefore does not do VLAN process. In a further embodiment, NMS network can individually incorporate a VLAN into, for instance the package of up logical channel 1 is managed by VLAN30. Now, the data that up logical channel 1 is received by CMC process, and are forwarded to Metropolitan Area Network (MAN) switch after being changed into the Ether frame with VLAN30 label. Other relevant configuration are with reference to the network planning of VLAN10 or VLAN20.
It is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.
The a series of detailed description of those listed above is only for illustrating of the feasibility embodiment of the present invention; they also are not used to limit the scope of the invention, and all should be included within protection scope of the present invention without departing from the skill of the present invention equivalent implementations made of spirit or change.
Claims (10)
1. the method for a hfc plant signal shunting, described cable network includes coaxial cable medium converter and the cable modem of coupling, it is characterized in that, described cable modem includes the Ethernet interface that at least two is external, described method includes the configuration file setting cable modem, and described configuration file includes:
Set up logical channel quantity and downlink logical number of channels;
Definition is for the up of different described Ethernet interfaces and downlink logical bandwidth chahnel;
Defining classification device, to mail to, by the up package that different Ethernet interfaces flow into, the up logical channel being associated;
Wherein, described up logical channel at least two, described downlink logical passage at least two.
2. the method for hfc plant signal according to claim 1 shunting, it is characterised in that different described Ethernet interfaces are specified different up logical channels by described configuration file.
3. the method for hfc plant signal according to claim 1 shunting, it is characterised in that described method also includes, configuring coaxial cable medium converter, so that coaxial cable medium converter performs following steps:
Downlink logical passage is associated, so that the package with VLAN tag received is imported transmission in the downlink logical passage being associated by coaxial cable medium converter for VLAN tag;
Before package is imported downlink logical passage, remove VLAN tag.
4. the method for hfc plant signal according to claim 3 shunting, it is characterised in that the package with difference VLAN tag is distributed to different downlink logical passages by described coaxial cable medium converter.
5. the method for hfc plant signal according to claim 3 shunting, it is characterised in that described method also includes, configuring coaxial cable medium converter, so that coaxial cable medium converter performs following steps:
For the up logical channel distribution VLAN tag being connected with modem;
The package received from modem is inserted the VLAN tag distributed.
6. the method for hfc plant signal according to claim 1 shunting, it is characterised in that described cable network also includes and the Metropolitan Area Network (MAN) switch of coaxial cable medium converter coupling, described Metropolitan Area Network (MAN) switch configuration at least two VLANID.
7. the system of a hfc plant signal shunting, it is characterised in that described system includes the cable modem and the Metropolitan Area Network (MAN) switch that couple respectively with coaxial cable medium converter, described system can be configured to perform the arbitrary described method of claim 1-6.
8. the system of hfc plant signal according to claim 7 shunting, it is characterised in that described cable modem can be module or be autonomous device.
9. the system of hfc plant signal according to claim 7 shunting, it is characterised in that described cable modem includes the Ethernet interface that at least two is external.
10. the system of hfc plant signal according to claim 9 shunting, it is characterized in that, described cable modem includes CPU, described CPU can according to the configuration file recognition classifier of described cable modem, so that the up package that different described Ethernet interfaces flow into is mail to the up logical channel being associated.
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