CN105704056B - The method and system of hfc plant signal shunting are carried out using the cable modem with VLAN - Google Patents
The method and system of hfc plant signal shunting are carried out using the cable modem with VLAN Download PDFInfo
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- CN105704056B CN105704056B CN201610049438.8A CN201610049438A CN105704056B CN 105704056 B CN105704056 B CN 105704056B CN 201610049438 A CN201610049438 A CN 201610049438A CN 105704056 B CN105704056 B CN 105704056B
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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
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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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Abstract
Present invention discloses the method and system that the cable modem used with VLAN carries out the shunting of hfc plant signal, by configuring cable modem and coaxial cable medium converter, multiple uplink/downlink logical channels can be set, it is inserted into VLAN tag for Ether frame and distributes the package of different VLAN tags to associated logical channel and carry out uplink/downlink transmission, to make radio and TV operator in deployment services, the signal stream of special services stream Yu other business can isolate.
Description
Technical field
The invention belongs to cable communicating technology fields, and in particular to the signal of hfc plant shunts.
Background technique
CM (Cable Modem, the cable modulatedemodulate of radio and television carrier network are accessed by cable tv coax
Adjust device) general an Ethernet interface only is provided for user communicate.If user has multiple terminal network appliances, it is necessary to configure
The network equipments such as interchanger, router extend network interface to realize radio and TV operator's service and online simultaneously.Even if extending network interface, institute
Unique Ethernet interface on the substantially still shared CM of some communication bandwidths, as use IP STB (Internet Protocol
Set-top Box, IP set-top box), the operators such as VOIP (Voice over Internet Protocol, the networking telephone) need
When the service flow of protection, the CM of above-mentioned single face is not able to satisfy device requirement, and service flow needs and other terminal network appliances
Signal stream fight for bandwidth.Once the other equipment of user carry out the operation of pole consumption bandwidth, such as an operation sudden peal of thunder, while using clothes
Business stream will encounter Caton.Even if operator is the individual bandwidth of service flow distribution, but since service flow and ordinary terminal are set
For the IP of standby signal stream distribution in same network segment, information is to disclose visible to other network users, is unsatisfactory for radio and TV operator
High security index.
Summary of the invention
It is an object of the invention to solve the problems, such as that signal shunts in Broadcast and TV system multi-service deployment.
For achieving the above object, the present invention provides a kind of method that hfc plant signal shunts, and hfc plant includes coupling
Coaxial cable medium converter and cable modem even, cable modem includes VLAN interchanger and at least two
External Ethernet interface, method include the configuration file for setting cable modem, and configuration file includes:
Set uplink logical channel quantity and downlink logical number of channels；
Definition is for the different VLAN ID uplink used and downlink logical bandwidth chahnel；
It, will be into so that VLAN interchanger is according to setting for each Ethernet interface assigned vlan ID of cable modem
Enter the required VLAN tag of the ethernet frame insertion definition of each Ethernet interface, also, the ether that will be issued from each Ethernet interface
Frame removes VLAN tag；
The uplink package for having VLAN tag is sent to corresponding uplink logical channel by defining classification device；
Wherein, uplink logical channel at least two, downlink logical channel at least two.
As the further improvement of an embodiment of the present invention, configuration file specifies different VLAN to different Ethernet interfaces
ID。
As the further improvement of an embodiment of the present invention, configuring coaxial cable medium converter, so that coaxial cable
Medium converter is that VLAN tag is associated with downlink logical channel, and the downlink package with VLAN tag is imported associated downlink
Logical channel.
As the further improvement of an embodiment of the present invention, hfc plant further includes and coaxial cable medium converter coupling
Metropolitan area network switch even, metropolitan area network switch configure at least two VLAN ID.
To achieve the above object, an embodiment of the present invention provides a kind of cable modem including VLAN interchanger
Device, the cable modem can be configured to perform the above method.
As the further improvement of an embodiment of the present invention, cable modem can be module or be independently to set
It is standby.
As the further improvement of an embodiment of the present invention, cable modem includes at least two external ether
Network interface, VLAN interchanger and Ethernet interface couple.
To achieve the above object, an embodiment of the present invention provides a kind of system that hfc plant signal shunts, including respectively
With the cable modem and metropolitan area network switch of the coupling of coaxial cable medium converter, system can be configured to perform above-mentioned
Any method.
As the further improvement of an embodiment of the present invention, cable modem includes VLAN interchanger, and VLAN is handed over
It changes planes and Ethernet interface couples, VLAN interchanger can be according to the configuration file of cable modem to entering from Ethernet interface
The required VLAN tag of Ether frame insertion definition, and VLAN tag is removed to the Ether frame issued from Ethernet interface.
As the further improvement of an embodiment of the present invention, cable modem includes CPU, and CPU can be according to cable
The uplink package for having VLAN tag is sent to corresponding uplink logic and led to by the configuration file recognition classifier of modem
Road.
Compared with prior art, provided by the invention to carry out hfc plant signal using the cable modem with VLAN
The method and system of shunting, make radio and TV operator in deployment services, can isolate the signal of special services stream Yu other business
Stream.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of hfc plant signal separate system of the present invention；
Fig. 2 is the structural schematic diagram of the cable modem with VLAN interchanger in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of cable modem in a further embodiment of this invention.
Specific embodiment
Below with reference to specific embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously
The present invention is not limited, structure that those skilled in the art are made according to these embodiments, method or functionally
Transformation is included within the scope of protection of the present invention.
With reference to Fig. 1, cable network of the invention includes CMC (Coax Media Converter, coaxial cable matchmaker in local side
Body converter), CMC serves the CM group with multiple CM users.CMC is coupled by coax network and CM group.CM can be with
For module or autonomous device, it is connect by the Ethernet interface (LAN) being set on CM with IP STB and other network equipments.
As shown in Figure 1, cable network of the invention further includes NMS (office side's network management system) server and Metropolitan Area Network (MAN) in local side
Interchanger.CMC is coupled by optical fiber or gigabit ethernet link and metropolitan area network switch, and the metropolitan area network switch and NMS are serviced
Device coupling.Metropolitan area network switch is also coupled to broadband services service network.
Metropolitan area network switch, CMC and CM form HFC (hybred fiber-coax cable) network by the coupling mode.Its
In, EoC technology is used in coax network coupling, the EoC technology is, for example, DOCSIS.In the coaxial electrical of hfc plant
On cable cross-line, CMC provides flow scheduling to CM by distribution time slot (timeslot), and the flow from CM is gathered metropolitan area
On network switch.
In an embodiment of the present invention, metropolitan area network switch passes through figure or Command Line Interface or other interchangers
The configuration mode of support, at least two 802.1Q VLAN ID, ID ranges of configuration are 0~4095, wherein 0 and 4095 by operator
Retain, not for users to use.VLAN ID is, for example, the ID that VLAN 10 and VLAN 20,10 and 20 respectively indicate VLAN.Wherein,
At least one VLAN deployment services is in the resource of broadband access network business, such as PPPoE (Point to Point Protocol
Over Ethernet, the point-to-point protocol based on Ethernet) server, DNS (Domain Name System, domain name system)
Server, advanced router etc..Meanwhile at least one VLAN deployment services is in the resource of service flow business, such as DHCP
(Dynamic Host Configuration Protocol, dynamic host configuration protocol) server, streaming media server etc..
Configure the logic in several uplink and downlink directions between CMC and CM to coax network in advance by CM configuration file
Channel.These logical channels can be independently operated, and can be set by CM configuration file different attributes, such as different
Bandwidth chahnel, priority level etc..CM configuration file is downloaded from the tftp server of local side on startup by CM, is worked as CM
The foundation of state setting.Tftp server belongs to the component part of office side NMS.The NMS system of broad sense also includes DNS (Domain
Name System, domain name system), DHCP, ACS (AccessControlServer, access control server), Radius etc. it is each
The server of the different purposes of kind.
CMC equipment by order line configure, down direction, from metropolitan area network switch enter CMC under VLAN tag
Row package can be sent by CMC by the specified down going channel between purpose CM.Package with different VLAN tags enters not
Same downlink logical channel.
CM receives the data packet with VLAN tag sent from the end CMC downlink, as the VLAN interchanger built in CM
(VLAN Switch) is handled.VLAN interchanger removes (untag) VLAN tag, the nothing that will be obtained from ethernet frame
The package of VLAN tag is issued from the corresponding Ethernet interface of CM.VLAN interchanger is carried out by CM before carrying out the processing
Corresponding configuration, required configuration are provided by CM configuration file.Since the package flowed out from the Ethernet interface of CM is without VLAN
The common ethernet format package of label, all types of network equipments of downstream connection, such as IP STB, VOIP equipment, computer, hand
Machine, the package can be handled by being not required to upgrading.
The VLAN that VLAN interchanger built in CM can be 0~4095 with identification id range.In order to allow at VLAN interchanger
Reason has the package of particular vlan label, and CM is programmed processing to VLAN interchanger by MDIO interface, so that VLAN is exchanged
Machine carries out the package processing.CM provides a variety of man-machine interfaces for configuration VLAN ID, such as GUI, MIB and Vendor TLV etc..
By MIB and Vendor TLV, operator can set and modify the specific number of VLAN ID in CM configuration file.
Up direction, the package flowed by (LAN mouthfuls) of CM Ethernet interface, is so-called uplink package.It is flowed into from Ethernet interface
Package be common Ethernet package without VLAN tag, VLAN interchanger is inserted into VLAN in the ethernet frame of the package
Label is sent to CM CPU.
Further, CM includes at least two Ethernet interfaces to connect with external equipment.VLAN interchanger is in ethernet frame
Middle be inserted into VLAN tag corresponds to the Ethernet interface that the package flows into.The package flowed into from different Ethernet interfaces, VLAN are handed over
It changes planes and is inserted into different VLAN tags.
CM CPU receives the package with VLAN tag from VLAN interchanger and carries out the examination of VLAN tag, is configured according to CM
Package with particular vlan label is dealt into CMC from the specified upstream logical channel distributed by file.
CMC receives the package uploaded by source CM, is directly forwarded to metropolitan area network switch.
Metropolitan area network switch receives the package that CMC is uploaded, and screens to VLAN tag, will have the package of VLAN tag
It is forwarded to VLAN network segment corresponding to label respectively.Before package is produced from metropolitan area network switch, VLAN tag is removed.
It include SoC (System-on-a-Chip, system level chip) with reference to Fig. 2, CM.SoC includes CPU, Docsis agreement
MAC function and Docsis agreement PHY function.Further, SoC configures interface abundant, can be with external devices electricity
Property connection composition needed for system.
CM further includes the VLAN interchanger (VLAN Switch) with SoC coupling, in Fig. 2 WAN mouthful be VLAN interchanger and
The upper united mouth (uplink) of SoC connection.After the completion of the configuration of VLAN interchanger, the WAN mouthfuls of VLAN as the VLAN interchanger
Trunk mouthfuls (trunking).VLAN interchanger has several Ethernet interfaces (LAN) to couple with downstream network device.
CM further includes the read/write memory medium with SoC coupling, may be, for example, ROM (Read-Only Memory, it is read-only to deposit
Store up memory body) or RAM (Random Access Memory, random access memory).RAM provides address space for CPU operation,
ROM, for example, Fig. 2 shows Flash provide program and data space for system.
CM further includes homodromy (Diplexer) and electronics frequency modulation head (Silicon Tuner).In other embodiments
In, homodromy and electronics frequency modulation head can be integrated into CPU.
CM is connected by F-connector (F-connector) with coax network, and F-connector and homodromy couple.
Downlink Docsis protocol signal works in 91MHz frequencies above, and homodromy will be above the signal of 91MHz from same
Separated in shaft cable, be sent into electronics frequency modulation head, electronics frequency modulation head by high-frequency signal change into suitable intermediate-frequency IF signal (30~
40MHz) it is sent into SoC processing.SoC receives the intermediate-freuqncy signal of Docsis agreement, and CPU is right using the part PHY and the part MAC
Docsis protocol data is handled, and Docsis message is released, and is solved user data and is converted into general comprising the user data
Logical Ethernet package.The Ethernet package is sent to VLAN interchanger by WAN mouthfuls by SoC.VLAN interchanger is from Ethernet
VLAN tag is removed in frame, and the obtained common ethernet format package without VLAN tag is issued from corresponding Ethernet interface.
To realize the present invention, it needs to set the configuration file of CM.CM follows Docsis agreement, makes during online
With other Data Transport Protocols such as TFTP agreement or HTTP, the configuration file of CM is obtained from local side, includes pair in configuration file
The setting item of CM.Implement at least to need to set in configuration file of the invention:
Downlink logical number of channels；
Uplink logical channel quantity；
Define the uplink and downlink logical channel bandwidth used for different VLAN ID.Wherein, it is allocated for providing on broadband
The uplink and downlink logical channel of service is netted, bandwidth can be determined according to the broadband service SLA grade of user；It is allocated for providing
The uplink and downlink logical channel of special service stream, bandwidth can the determinations of the bandwidth according to needed for the required service, for example, SD HD machine
Top box opens 4M downlink, 1M uplink；For the open 8M downlink of high definition SD set-top box, 2M uplink etc.；
Different VLAN ID is specified for each Ethernet interface, so that VLAN interchanger will enter each Ethernet according to setting
The required VLAN tag of the ethernet frame insertion definition of mouth, also, the Ether frame issued from each Ethernet interface is removed into VLAN
Label.
Defining classification device (Classifier), so that the uplink package with VLAN tag is sent to corresponding uplink by CPU
Logical channel.
Except above-mentioned setting, CM configuration file also includes that other guarantee the basic configuration that CM is worked normally, such as MAC CPE number
Amount etc..
To realize the present invention, it is also necessary to CMC is configured, so that CMC executes following steps:
It is associated with downlink logical channel for VLAN tag, so that the band VLAN tag that CMC will be received from metropolitan area network switch
Package import in associated downlink logical channel and transmit.
The present embodiment is to be not necessity to downlink logical channel defining classification device in CM configuration file.As previously mentioned, right
CMC, which carries out configuration, may be implemented to distribute to the package of different VLAN tags into different downlink logical channels.It should be understood that
The technical staff of this patent is read by this patent education and inspiration, it should be appreciated that under the package of certain VLAN tag of downlink and certain
Association between row logical channel can similarly be obtained by the previously described technology applied to up direction, and not this is special
Benefit does not cover this kind of implementation.
In one embodiment, two 802.1Q VLAN ID:VLAN 10 and VLAN 20 are configured on metropolitan area network switch.Root
According to Docsis agreement, CM is registered using CM configuration file to CMC.After the completion of registration, sets up between CM and CMC and configured according to CM
The uplink logical channel (such as three uplink logical channels and three downlink logical channels) of documentation requirements, and to each upper and lower
Row logical channel bandwidth allocation.Wherein, uplink logical channel 1 and downlink logical channel 1 ' are used for Docsis management agreement and operation
The channel quotient NMS, uplink logical channel 2 and downlink logical channel 2 ' are used for VLAN 10, uplink logical channel 3 and downlink logical
Channel 3 ' is used for VLAN 20.
Down direction, VLAN's 10 enters metropolitan area network switch without VLAN tag Ether frame, and metropolitan area network switch is inserted for it
Enter the label of VLAN 10, is then issued to CMC by high speed data links such as optical fiber or gigabit Ethernets.CMC, which is received, to be had
The Ether frame of 10 label of VLAN inquires purpose cm device according to target MAC (Media Access Control) address (DA) first, is then according to VLAN tag
10, it assigns it to and is sent with the associated downlink logical channel 2 ' purpose CM, then the Ether frame is put into downlink and patrolled by CMC
In the transmit queue for collecting channel 2 ', purpose CM is sent to by downlink logical channel 2 '.Similarly, the Ether frame warp of VLAN 20
Purpose CM is sent to by downlink logical channel 3 ' after metropolitan area network switch and CMC, this will not be repeated here.Into the ether of CMC
If frame is sent to purpose CM by downlink logical channel 1 ' both without VLAN 10 without there is 20 label of VLAN.
Purpose CM includes at least the first Ethernet interface LAN 1 and the second Ethernet interface LAN 2.Purpose CM is received from CMC
Downlink package unpacks through Docsis PHY, Docsis MAC and removes Docsis header, the package with VLAN tag is obtained, by CPU
The WAN mouth of VLAN interchanger is sent to by WAN mouthfuls.VLAN interchanger receives the ethernet frame with VLAN tag from WAN mouthfuls,
According to CM configuration file, VLAN interchanger removes VLAN tag and is then forwarded to LAN 1 if it is the package of VLAN 10, if
It is that the package of VLAN 20 is then forwarded to LAN 2.Herein, it is forwarded to LAN mouthfuls of the ethernet frame for being free from VLAN tag.
Up direction, CM configuration file setting VLAN interchanger establish VLAN 10, are set as VLAN for WAN mouthfuls and LAN 1
10 member port.LAN 1 carries out uplink to package, while being inserted into 10 label of VLAN.WAN mouthfuls only carry out uplink to package
Transmission is removed without label.The configuration file concurrently sets VLAN interchanger and establishes VLAN 20, and WAN mouthfuls and LAN 2 are set
It is set to the member port of VLAN 20.LAN 2 carries out uplink to package, while being inserted into 20 label of VLAN.WAN to package only into
Row uplink is removed without label.
CM configuration file also defines the first classifier and the second classifier, makes CPU recognition classifier in package scheduling.Band
There is the Ethernet package of VLAN tag by VLAN interchanger from WAN mouthfuls of feeding CPU.CPU is according to the setting of the first classifier, by band
There is the uplink package of 10 label of VLAN to be sent into the transmission queue of uplink logical channel 2, through Docsis MAC and Docsis PHY's
Processing marks Dcosis header, and is sent to CMC through uplink logical channel 2.Similarly, CPU setting according to the second classifier
It is fixed, the uplink package of 20 label of VLAN is sent to the transmission queue of uplink logical channel 3, is sent to after marking Docsis header
CMC.If the uplink package for being sent into CPU was both then sent to without 10 label of VLAN without there is 20 label of VLAN
The transmission queue of row logical channel 1 is sent to CMC after marking Docsis header.
CMC receives the Docsis frame from source CM uplink, releases the Docsis header of frame, solves the ether with VLAN tag
Frame.Then, CMC transmits the Ether frame to metropolitan area network switch by high speed data links such as optical fiber or gigabit Ethernets.City
After domain network switch identifies VLAN ID, VLAN tag, forwarding ethernet frame to corresponding VLAN are removed.
In still another embodiment of the process, it is 0 that metropolitan area network switch, which configures at least two 802.1Q VLAN ID, ID ranges,
~4095, wherein 0 and 4095 are retained by operator, not for users to use.Wherein, the network of at least one VLAN ID disposes clothes
Be engaged in the resource of broadband access network business, for example, PPPoE (Point to Point Protocol over Ethernet, based on
The point-to-point protocol netted very much) server, DNS (Domain Name System, domain name system) server, advanced router etc..
Meanwhile the resource of service flow business, such as DHCP (Dynamic Host are served in the network deployment of at least one VLAN ID
Configuration Protocol, dynamic host configuration protocol) server, streaming media server etc..
Configure the logic in several uplink and downlink directions between CMC and CM to coax network in advance by CM configuration file
Channel.These logical channels can be independently operated, and can be set by CM configuration file different attributes, such as different
Bandwidth chahnel, priority level etc..CM configuration file is downloaded from the tftp server of local side on startup by CM, is worked as CM
The foundation of state setting.Tftp server belongs to the component part of office side NMS.The NMS system of broad sense also includes DNS (Domain
Name System, domain name system), DHCP, ACS (AccessControlServer, access control server), Radius etc. it is each
The server of the different purposes of kind.
CMC is configured, so that network switch enters the downlink package with VLAN tag of CMC, meeting from metropolitan area in down direction
It is sent by CMC by specified down going channel between purpose CM, also, before CMC issues package to CM, removes VLAN mark
Label, so that CM received is common package without VLAN tag.In other examples, a downlink can be shared to patrol
It collects channel to be sent, correspondingly, shares same bandwidth.
CM receives the general data package sended over from the end CMC and leads to Different Logic without any specially treated
The downlink package that road flows into is sent to corresponding Ethernet interface.CM includes at least two Ethernet interfaces (LAN) to connect with upstream device
It connects, each Ethernet interface is corresponding with specific logical channel.Specifically, CM CPU is according to ARP table and N2M (Net2Media) table
Downlink package is addressed, and package is emitted to downstream network device from corresponding Ethernet interface according to addressing results.Its
In, ARP table is technology of the CM decision conversion IP address to MAC Address；N2M table be CM decision can be accessed from which network interface it is specific
The technology of MAC.When package enters CM from any network interface, CM is using these technical notes or updates MAC Address, IP address and net
Incidence relation between mouthful.
Up direction, the uplink package flowed by each Ethernet interface of CM is without VLAN tag.CM is flowed into according to package
The physical interface package hair distribution that may determine that its source, and the Ethernet interface is flowed into associated uplink logical channel
To be sent to CMC.
CMC is inserted into VLAN tag corresponding with channel to the package obtained from the uplink logical channel of source CM, then sends
Give metropolitan area network switch.Specifically, after CM completes registration to CMC, CMC knows every Connecting quantity between the CM of the source,
In include the SID (Service Identifier, service identifier) of each uplink logical channel that source CM is used.SID is CM
The unique identification of uplink logical channel between CMC distributes to uplink logical channel used in CM by CMC.CMC is patrolled in downlink
It collects and broadcasts (Broadcast) MAP message in channel, be managed collectively the uplink information hair of the cm device on all Docsis networks
Send the time slot (time slot) of time.For example, the SID for one of uplink logical channel that purpose CM is used is m, MAP message
In, a certain section of time slot is associated with SID=m.After purpose CM obtains the association from MAP message, in this section of time slot from corresponding
Row logical channel, which is sent, to be classified device and is placed in the information of the channel upstream queue to CMC.Since Docsis network is that whole network is same
Step can accurately judge that the time slot is occupied by which uplink logical channel of source CM, and the upstream data collected at this time must
From a certain specified upstream logical channel of source CM.CMC is inserted into specified according to uplink package of the configuration to uplink logical channel
VLAN tag.
Metropolitan area network switch receives the package of CMC upload, screens to VLAN tag, will have the package of VLAN tag
It is forwarded to corresponding network segment respectively.Before package is produced from metropolitan area network switch, VLAN tag is removed.
It include SoC with reference to Fig. 3, CM, SoC includes the MAC function of CPU, Docsis agreement and the PHY function of Docsis agreement
Energy.Further, SoC configures interface abundant, system needed for composition being electrically connected with external devices.The interface packet
Include several Ethernet interfaces (LAN).
CM further includes the read/write memory medium with SoC coupling, may be, for example, ROM or RAM.ROM may be, for example, Fig. 3 and show
Flash.
CM further includes homodromy and electronics frequency modulation head, can be independent module as shown in Figure 3, can also be collected
At into CPU.
CM is connected by F-connector with coax network.F-connector and homodromy couple.
SoC receives the intermediate-freuqncy signal of Docsis agreement, and CPU is using the part PHY and the part MAC to Docsis agreement number
According to being handled, Docsis heading is released, user data is finally solved and is converted into the common ether comprising the user data
Net package.The Ethernet package is sent to each terminal device plugged by SoC by Ethernet interface.
Implement at least to need to set in CM configuration file of the invention:
Downlink logical number of channels；
Uplink logical channel quantity；
Define the uplink and downlink logical channel bandwidth used for different Ethernet interfaces.Wherein, an at least Ethernet interface is assigned
For providing the uplink and downlink logical channel of broadband access network service, bandwidth is determined according to the broadband service SLA grade of user；At least
One Ethernet interface is allocated for providing the uplink and downlink logical channel of IP STB business service, bandwidth service institute needed for
Bandwidth is needed to determine；
Defining classification device leads to so that the uplink package that different Ethernet interfaces flow into is sent to associated uplink logic by CPU
Road.
Except above-mentioned setting, CM configuration file also includes that other guarantee the basic configuration that CM is worked normally, such as MAC CPE number
Amount etc..
Further, CMIM (Cable Modem Interface Mask, cable tune can be used to the definition of classifier
Modulator-demodulator interface mask), to carry out the examination of Ethernet interface, or use the customized other modes of manufacturer such as TLV43
It is screened.
To realize the present invention, it is also necessary to CMC is configured, so that CMC executes following steps:
It is associated with downlink logical channel for VLAN tag, so that the band VLAN tag that CMC will be received from metropolitan area network switch
Package import in associated downlink logical channel and transmit；
Before package is imported downlink logical channel, VLAN tag is removed；
Uplink logical channel to connect with purpose CM distributes VLAN tag；
Distributed VLAN tag is inserted into the package received from CM.
The present embodiment is to be not necessity to downlink logical channel defining classification device in CM configuration file.It should be understood that
It is that carrying out configuration appropriate to CMC may be implemented to distribute to the package of different VLAN tags into different downlink logical channels.It reads
The technical staff of reader patent is by this patent education and inspiration, it should be appreciated that the package of certain VLAN tag of downlink and certain downlink
Association between logical channel can similarly be obtained, not this patent by the technology applied to up direction described above
This kind of implementation is not covered.
In one embodiment, two 802.1Q VLAN ID:VLAN 10 and VLAN 20 are configured on metropolitan area network switch.Root
According to Docsis agreement, CM is registered using the configuration file to CMC.After the completion of registration, sets up between CM and CMC and matched according to CM
Set the uplink logical channel (such as three uplink logical channels and three downlink logical channels) of documentation requirements, and to it is each it is upper,
Downlink logical channel bandwidth allocation.Wherein, uplink logical channel 1 and downlink logical channel 1 ' are used for Docsis management agreement and fortune
It seeks the channel quotient NMS, uplink logical channel 2 and downlink logical channel 2 ' to use for VLAN 10, uplink logical channel 3 and downlink are patrolled
Channel 3 ' is collected to use for VLAN 20.
Down direction, VLAN's 10 enters metropolitan area network switch without VLAN tag Ether frame, and metropolitan area network switch is inserted for it
The VLAN tag for entering VLAN 10, is then issued to CMC by optical fiber or gigabit ethernet link.CMC is received with VLAN
The Ether frame of 10 labels inquires target cm device according to target MAC (Media Access Control) address (DA) first, is then 10 according to VLAN tag,
Determine that use is sent with the associated downlink logical channel 2 ' the CM, at this point, CMC removes the VLAN tag of the Ether frame, then
The Ether frame is put into the transmit queue in downlink logical channel 2 ', is sent to purpose CM.Similarly, the Ether frame of VLAN 20
After metropolitan area network switch and CMC, it is removed VLAN tag, purpose CM is then sent to by downlink logical channel 3 ', herein
It does not repeat them here.If into CMC Ether frame both without VLAN 10 without there is 20 label of VLAN, pass through downlink logical
Channel 1 ' is sent to purpose CM.
Purpose CM receives downlink package from CMC, unpacks through Docsis PHY, Docsis MAC and removes Docsis header,
Obtain the package without VLAN tag.CM CPU is addressed according to ARP table and N2M (Net2Media) table, and is tied according to addressing
Fruit will be sent to upstream device from the received downlink package in downlink logical channel 2 ' from LAN 1, will connect from downlink logical channel 3 '
The downlink package of receipts is sent to upstream device from LAN.
Up direction, CM configuration file define the first classifier and the second classifier, make CPU identification point in package scheduling
Class device, and according to the setting of the first classifier, the uplink package of the first Ethernet interface LAN 1 is sent to uplink logical channel 2
The uplink package of second Ethernet interface LAN 2 is sent to uplink logical channel 3 according to the setting of the second classifier by transmit queue
Transmit queue.If being sent into the uplink package of CPU neither from the first Ethernet interface LAN 1 nor from the second ether
Network interface LAN 2 is then sent to the transmission queue of uplink logical channel 1.
CMC receives the Docsis frame from CM uplink, and judgement is received from which uplink logical channel of purpose CM.If it is
It is received from the uplink logical channel 2 of purpose CM, then Docsis frame head is removed, solve Ether frame, then configured according to CMC, it is right
The Ether frame is inserted into the label of VLAN 10, sends the Ether frame with VLAN tag by optical-fibre channel or gigabit Ethernet
Give metropolitan area network switch.Same processing from the Docsis frame of 3 uplink of uplink logical channel, and switch to 20 label of VLAN with
Too frame is sent to metropolitan area network switch by high-speed link.
From the received Docsis frame of uplink logical channel 1, it is specific that this example assumes that the NMS network of operator is not divided into
VLAN, therefore VLAN processing is not done.In a further embodiment, NMS network can individually incorporate a VLAN, such as VLAN 30 into
The package of uplink logical channel 1 is managed.At this point, CMC handles the received data of uplink logical channel 1, by it
Metropolitan area network switch is forwarded to after changing into the Ether frame with 30 label of VLAN.Other relevant configurations refer to VLAN 10 or VLAN
20 network planning.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method that hfc plant signal shunts, the hfc plant includes the coaxial cable medium converter and cable of coupling
Modem, which is characterized in that the cable modem includes VLAN interchanger and at least two external Ethernets
Mouthful, the method includes setting the configuration file of cable modem, the configuration file includes:
Set uplink logical channel quantity and downlink logical number of channels；
Definition is for the different VLAN ID uplink used and downlink logical bandwidth chahnel；
It, will be into so that VLAN interchanger is according to setting for each Ethernet interface assigned vlan ID of cable modem
Enter the required VLAN tag of the ethernet frame insertion definition of the Ethernet interface, also, will be issued from the Ethernet interface
Ethernet frame removes VLAN tag；
The uplink package for having VLAN tag is sent to corresponding uplink logical channel by defining classification device；
Wherein, the uplink logical channel at least two, the downlink logical channel at least two.
2. the method that hfc plant signal according to claim 1 shunts, which is characterized in that the configuration file is to difference
The Ethernet interface specifies different VLAN ID.
3. the method that hfc plant signal according to claim 1 shunts, which is characterized in that the method also includes configurations
Coaxial cable medium converter, so that coaxial cable medium converter is that VLAN tag is associated with downlink logical channel, and by band
The downlink package of VLAN tag imports associated downlink logical channel.
4. the method that hfc plant signal according to claim 3 shunts, which is characterized in that the hfc plant further include with
The metropolitan area network switch of coaxial cable medium converter coupling, the metropolitan area network switch configure at least two VLAN ID.
5. a kind of cable modem, which is characterized in that including VLAN interchanger, the cable modem can be configured
In method described in perform claim requirement 1.
6. cable modem according to claim 5, which is characterized in that the cable modem can be mould
Block is autonomous device.
7. cable modem according to claim 5, which is characterized in that the cable modem includes at least
Two external Ethernet interfaces, the VLAN interchanger and the Ethernet interface couple.
8. the system that a kind of hfc plant signal shunts, which is characterized in that the system comprises respectively with coaxial cable media conversion
The cable modem and metropolitan area network switch of device coupling, the system can be configured to perform any institute of claim 1-4
The method stated.
9. the system that hfc plant signal according to claim 8 shunts, which is characterized in that the cable modem
Including VLAN interchanger, the VLAN interchanger and the Ethernet interface are coupled, and the VLAN interchanger can be according to the cable
The configuration file of the modem VLAN tag required to the Ether frame insertion definition entered from the Ethernet interface, and
VLAN tag is removed to the Ether frame issued from the Ethernet interface.
10. the system that hfc plant signal according to claim 8 shunts, which is characterized in that the cable modem
Including CPU, the CPU can will have VLAN tag according to the configuration file recognition classifier of the cable modem
Uplink package be sent to corresponding uplink logical channel.
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| WO2019079969A1 (en) * | 2017-10-24 | 2019-05-02 | Interdigital Ce Patent Holdings | Cable modem interface mask based virtual local area network mapping |
| CN110035540B (en) * | 2019-03-25 | 2023-04-07 | 苏州摩联通信技术有限公司 | Cable modem and data transmission system |
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| CN102624560A (en) * | 2012-03-12 | 2012-08-01 | 深圳市天威视讯股份有限公司 | Distributed-deployment and centralized-control cable TV (Television) network broadband access system |
| EP2509259A1 (en) * | 2011-04-05 | 2012-10-10 | Broadcom Corporation | Unified network management of hybrid fiber coaxial (HFC) network |
| CN102739514A (en) * | 2011-04-05 | 2012-10-17 | 美国博通公司 | Traffic switching in hybrid fiber coaxial (hfc) network |
| CN103581059A (en) * | 2012-07-23 | 2014-02-12 | 华为技术有限公司 | Two-layer access method, device and system in HFC network |
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| EP2509259A1 (en) * | 2011-04-05 | 2012-10-10 | Broadcom Corporation | Unified network management of hybrid fiber coaxial (HFC) network |
| CN102739514A (en) * | 2011-04-05 | 2012-10-17 | 美国博通公司 | Traffic switching in hybrid fiber coaxial (hfc) network |
| CN102624560A (en) * | 2012-03-12 | 2012-08-01 | 深圳市天威视讯股份有限公司 | Distributed-deployment and centralized-control cable TV (Television) network broadband access system |
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