CN104283837B - It traces to the source relation establishing method and device - Google Patents
It traces to the source relation establishing method and device Download PDFInfo
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- CN104283837B CN104283837B CN201310273493.1A CN201310273493A CN104283837B CN 104283837 B CN104283837 B CN 104283837B CN 201310273493 A CN201310273493 A CN 201310273493A CN 104283837 B CN104283837 B CN 104283837B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
- H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
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Abstract
It traces to the source relation establishing method and device the invention discloses one kind.Wherein, which includes：Forwarding unit is converged to receive from cable modem（CM）DynamicHost setting agreement（DHCP）Message；Convergence forwarding unit establishes the relationship of tracing to the source between DHCP message and CM according to pre-set index information.By the present invention, achieve the effect that be forwarded in convergence forwarding unit DHCP message by Ethernet protocol after by CMC and be inserted into relay agent information Option82.
Description
Technical field
The present invention relates to the communications field, trace to the source relation establishing method and device in particular to one kind.
Background technology
C-DOCSIS（The transmission principle and specification of Chinese wired broadcasting TV）System requirements relay agent should support to insert
Enter DynamicHost setting agreement（Dynamic Host Configuration Protocol, referred to as DHCP）Relay agent believes
Breath（Option82）.Wherein, C-DOCSIS system specifications is defined as follows DHCP Option82：82.1Circuit ID：It connects
Receive the interface message of DHCP request message；82.2Remote ID：The media access control of CM corresponding to DHCP request message
（Media Access Control, referred to as MAC）Address；CMTS Capability：Wire cable media changer devices are described
（Cable Media Converter, referred to as CMC）（Wire cable media changer devices are realized from coax network to nothing
Source optical-fiber network（Passive Optical Network, referred to as PON）Or the data converting function of Ethernet, CMC downlinks are led to
Cable TV coaxial network insertion cm device is crossed, uplink passes through PON or Ethernet cut-in convergent network）Ability, such as C-
The version of DOCSIS.
In traditional DOCSIS（The transmission principle and specification of wired broadcasting TV）In system, cable modem termination system
System（Cable Modem Terminal Systems, referred to as CMTS）Key-course can be intervened by the media that DOCSIS is defined
（Media Access Control, referred to as MAC）Frame header（Frame header）Obtain which cable tune message comes from
Modulator-demodulator（Cable Modem, referred to as CM）, so as to establish the relationship of tracing to the source between DHCP and CM, to CM and its lower extension
Personal computer（Personal Computer, referred to as PC）, set-top box（Set Top Box, referred to as STB）Deng stamping just
True Option82Remote ID.In order to understand foregoing description, please refer to Fig.1, Fig. 1 is the tradition according to the relevant technologies
The structure composed figure of DOCSIS canonical systems.
In C-DOCSIS systems, function module is displaced downwardly to optical node, and former CMTS is accumulated forwarding unit and CMC is substituted,
Its group-network construction is as shown in Fig. 2, Fig. 2 is the C-DOCSIS distribution canonical systems according to the relevant technologies（In C-DOCSIS systems
DHCP relay module is added on the basis of specification artwork）Realization Organization Chart.Within the system, CMC is compatible DOCSIS agreements,
So CMC can still establish the relationship of tracing to the source between DHCP.
But DHCP message is by Ethernet protocol after CMC by being forwarded to convergence forwarding unit, and what DOCSIS was defined
MAC Frame header have been stripped off, therefore converge the MAC Frame that forwarding unit can not be defined by DOCSIS again
Header establishes the relationship of tracing to the source between DHCP.
During for DHCP message in the relevant technologies by being forwarded to convergence forwarding unit by Ethernet protocol after CMC, convergence
Tracing back between CM and DHCP message that the MAC Frame header that forwarding unit can not be defined by DOCSIS again are established under CMC
The problem of source relationship, currently no effective solution has been proposed.
Invention content
It traces to the source relation establishing method and device the present invention provides one kind, at least to solve the above problems.
The relation establishing method according to an aspect of the invention, there is provided one kind is traced to the source, including：Forwarding unit is converged to receive
From cable modem（CM）DynamicHost setting agreement（DHCP）Message；Forwarding unit is converged according to pre-set
Index information establishes the relationship of tracing to the source between DHCP message and CM.
Preferably, index information includes：Index value, wherein, index value is capable of the media access control MAC of unique mark CM
Address.
Preferably, index value is by wire cable media changer devices（CMC）For CM distribution.
Preferably, index value is CDT labels, wherein, CDT labels are to use virtual LAN（VLAN）Tagged manner pair
The label that Business Stream where the data packet of DHCP message is identified.
Preferably, convergence forwarding unit includes at least one of：Optical line terminal（OLT）, interchanger, router.
According to another aspect of the present invention, it provides one kind relationship of tracing to the source and establishes device, positioned at convergence forwarding unit, packet
It includes：Receiving module, for receiving from cable modem（CM）DynamicHost setting agreement（DHCP）Message；Establish mould
Block, for establishing the relationship of tracing to the source between DHCP message and CM according to pre-set index information.
Preferably, index information includes：Index value, wherein, index value is capable of the media access control MAC of unique mark CM
Address.
Preferably, index value is to be distributed by CMC for CM.
Preferably, index value is CDT labels, wherein, CDT labels are to use virtual LAN（VLAN）Tagged manner pair
The label that Business Stream where the data packet of DHCP message is identified.
Preferably, convergence forwarding unit includes at least one of：Optical line terminal（OLT）, interchanger, router.
By the present invention, use according to pre-set index information for the DHCP message from cable modem with
CM foundation is traced to the source the mode of relationship, solves in the relevant technologies DHCP message by being forwarded to convergence by Ethernet protocol after CMC
During forwarding unit, the MAC Frame header that can not be defined again by DOCSIS of convergence forwarding unit establish CM under CMC with
Between DHCP message trace to the source relationship the problem of, reached can after by CMC by Ethernet protocol be forwarded to convergence forwarding
The effect of relay agent information Option82 is inserted into equipment DHCP message.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and forms the part of the application, this hair
Bright illustrative embodiments and their description do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the structure composed figure according to traditional DOCSIS canonical systems of the relevant technologies；
Fig. 2 is the C-DOCSIS distribution canonical systems according to the relevant technologies（On C-DOCSIS system specifications artwork basis
Upper addition DHCP relay module）Realization Organization Chart；
Fig. 3 is relation establishing method flow chart of tracing to the source according to embodiments of the present invention；
Fig. 4 is the structure diagram that the relationship of tracing to the source according to embodiments of the present invention establishes device；
Fig. 5 is the form schematic diagram of CDT labels according to the preferred embodiment of the invention；
Fig. 6 is C-DOCSIS canonical systems according to the preferred embodiment of the invention（In C-DOCSIS system specifications artwork bases
DHCP relay module is added on plinth）Realization Organization Chart；
Fig. 7 is that C-DOCSIS according to the preferred embodiment of the invention is inserted into Option82 flow charts by CDT labels.
Specific embodiment
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be combined with each other.
The present embodiment can be applied in C-DOCSIS network systems, to realize the relaying in C-DOCSIS network systems
The process of relay agent information Option82 is inserted on agency.Certainly, the present embodiment is not limited to C-DOCSIS network systems.
One kind is present embodiments provided to trace to the source relation establishing method.Fig. 3 is that the relationship of tracing to the source according to embodiments of the present invention is built
Cube method flow chart, as shown in figure 3, this method mainly includes the following steps that（Step S302- steps S304）：
Step S302, convergence forwarding unit are received from cable modem（CM）DynamicHost setting agreement
（DHCP）Message；
Step S304, convergence forwarding unit establish tracing to the source between DHCP message and CM according to pre-set index information
Relationship.
By above-mentioned steps, can be forwarded in convergence forwarding unit DHCP message by Ethernet protocol after by CMC
It is inserted into relay agent information Option82.
In the present embodiment, index information can include：Index value, wherein, index value is capable of the media of unique mark CM
Access control MAC address.In a preferred embodiment of the present embodiment, index value can be distributed by CMC for CM,
That is each index value corresponds respectively to a CM, i.e. one-to-one relationship, it is preferable that index value can be CDT marks
Label, wherein, CDT labels are to use virtual LAN（VLAN）Tagged manner flows into the business where the data packet of DHCP message
The label that line identifier obtains.
In the present embodiment, convergence forwarding unit can include at least one of：Optical line terminal（Optical Line
Terminal, referred to as OLT）, interchanger, router.That is, can be in these three equipment in the convergence forwarding unit
Any one or these three equipment in arbitrary two kinds of equipment combination, can also be the combination of three kinds of equipment.
The relation establishing method of tracing to the source provided through this embodiment can well solve convergence forwarding unit needs and not have
In the case of there are the MAC Frame header that DOCSIS is defined, DHCP message and CM are established by using the mode of CDT labels
Between relationship of tracing to the source, and then realize and relay agent information Option82 be inserted into DHCP message.
It present embodiments provides one kind relationship of tracing to the source and establishes device.Fig. 4 is that the relationship of tracing to the source according to embodiments of the present invention is built
The structure diagram of vertical device, which is located at convergence forwarding unit, to realize above-mentioned relation establishing method of tracing to the source.Such as Fig. 4 institutes
Show, which includes：Receiving module 10 and establish module 20.Wherein, receiving module 10, for receiving from cable modem
The DynamicHost setting protocol DHCP message of device CM；Module 20 is established, receiving module 10 is connected to, for according to pre-set
Index information establishes the relationship of tracing to the source between DHCP message and CM.
In the present embodiment, index information can include：Index value, wherein, index value is capable of the media of unique mark CM
Access control MAC address.
In the present embodiment, index value can be distributed by CMC for CM.Preferably, index value is CDT labels, wherein,
CDT labels are that the Business Stream where the data packet of DHCP message is identified to obtain using virtual LAN VLAN tagged manner
Label.
In the present embodiment, convergence forwarding unit can include at least one of：Optical line terminal（OLT）, interchanger,
Router.
The relationship of tracing to the source provided through this embodiment establishes device, can well solve convergence forwarding unit needs and not have
In the case of there are the MAC Frame header that DOCSIS is defined, DHCP message and CM are established by using the mode of CDT labels
Between relationship of tracing to the source, and then realize and relay agent information Option82 be inserted into DHCP message.
The relation establishing method of tracing to the source provided with reference to Fig. 5, Fig. 6 and Fig. 7 and preferred embodiment above-described embodiment
It is described in more details.
Before this preferred embodiment is described, fitted first to the middle CDT labels for needing to use are described below
Work as introduction：C-DOCSIS protocol definitions CDT（C-DOCSIS TAG）Label, wherein, CDT refer to the method with VLAN tag come
The Business Stream where the data packet being classified is identified, form is as shown in Figure 5（Fig. 5 is CDT marks according to the preferred embodiment of the invention
The form schematic diagram of label）.
Fig. 6 is please referred to, Fig. 6 is C-DOCSIS canonical systems according to the preferred embodiment of the invention（In C-DOCSIS systems
DHCP relay module is added on the basis of specification artwork）Realization Organization Chart.This preferred embodiment using system architecture shown in fig. 6 as
Hardware foundation is realized.
In the preferred embodiment, radio frequency interface module should be each in up direction, Fig. 6 for C-DOCSIS agreements regulation
The VLAN tag of CDT forms is added in data packet from CM.CM Index（I.e. above-mentioned index value）It is that CMC is distributed for each CM
Unique mark, the message of the CPE of each CM and its lower extension sends out the CM that Shi Douhui adds this CM from radio frequency interface module
Index。
In practical applications, a concordance list can be established according to CM Index for storing the MAC Address of each CM.It should
Each CM under index value energy unique mark DHCP relay module in concordance list.Certainly, for different convergence forwarding units
The distributed architecture of type, different DHCP relay modules can be defined different index values by actual conditions.For example, for light
Line terminal（OLT）For, the index value of poly- forwarding unit, which can be considered, to be defined as：PON Index+CMC Index+CM
Index, for interchanger（Switch）, for router, poly- forwarding unit index value, which can be considered, to be set to：Port Index+
CMC Index+CM Index。
It, can be by distinct device type and distribution by CDT labels being used to be used as CMC Index in C-DOSIS systems
Formula structure obtains CMC Index, port information etc., the side of the index value for the CM that generation can be under unique mark DHCP relay module
Formula, and then DHCP message and the relationship of tracing to the source of CM are established, it realizes and Option82 is inserted into DHCP message.
Fig. 7 is that C-DOCSIS according to the preferred embodiment of the invention is inserted into Option82 flow charts by CDT labels, is such as schemed
Shown in 7, which includes：
Step S702 receives uplink DHCP message；
Step S704, analytic message obtain CM Index and other information needed, generate index value；
Step S706, if discovery messages, if it find that, step S708 is performed, otherwise, performs step S712；
Step S708 parses Option82, and judges whether from CM, if so, performing step S710, otherwise, performs
Step S712；
Step S710 establishs or updates index value, forms CM MAC address entries；
Step S712 searches CM MAC by index value；
Step S714 is inserted into Option Remote Id.
Device is established using trace to the source relation establishing method and the relationship of tracing to the source that above-described embodiment provides, CMC can passed through
The effect that relay agent information Option82 is inserted into convergence forwarding unit DHCP message is forwarded to by Ethernet protocol afterwards.
It can be seen from the above description that the present invention realizes following technique effect：Using according to pre-set rope
Fuse breath establishes the mode for relationship of tracing to the source for the DHCP message from cable modem with CM, solves in the relevant technologies
When DHCP message by Ethernet protocol after CMC by being forwarded to convergence forwarding unit, convergence forwarding unit can not pass through again
Between CM and DHCP message that the MAC Frame header that DOCSIS is defined are established under CMC trace to the source relationship the problem of, reach
It can be forwarded in convergence forwarding unit DHCP message by Ethernet protocol after by CMC and be inserted into relay agent information
The effect of Option82.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Computing device realize that they can concentrate on single computing device or be distributed in multiple computing devices and be formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed in the storage device by computing device, and in some cases, it can be to be different from shown in sequence herein performs
The step of going out or describing they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.It to be combined in this way, the present invention is not limited to any specific hardware and softwares.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
- The relation establishing method 1. one kind is traced to the source, which is characterized in that including：It converges forwarding unit and receives the DynamicHost setting protocol DHCP message from cable modem CM；The convergence forwarding unit establishes tracing to the source between the DHCP message and the CM according to pre-set index information Relationship；Wherein, the index information includes：Index value, wherein, the index value is capable of the media access of CM described in unique mark Control MAC Address.
- 2. according to the method described in claim 1, it is characterized in that, the index value is by wire cable media changer devices CMC is CM distribution.
- 3. according to the method described in claim 1, it is characterized in that, the index value is CDT labels, wherein, the CDT labels It is that the Business Stream where the data packet of the DHCP message is identified using virtual LAN VLAN tagged manner Label.
- 4. according to the method in any one of claims 1 to 3, which is characterized in that the convergence forwarding unit includes following At least one：Optical line terminal OLT, interchanger, router.
- 5. one kind relationship of tracing to the source establishes device, positioned at convergence forwarding unit, which is characterized in that including：Receiving module sets protocol DHCP message for receiving the DynamicHost from cable modem CM；Module is established, for establishing the pass of tracing to the source between the DHCP message and the CM according to pre-set index information System；Wherein, the index information includes：Index value, wherein, the index value is capable of the media access of CM described in unique mark Control MAC Address.
- 6. device according to claim 5, which is characterized in that the index value is by wire cable media changer devices CMC is CM distribution.
- 7. device according to claim 5, which is characterized in that the index value is CDT labels, wherein, the CDT labels It is that the Business Stream where the data packet of the DHCP message is identified using virtual LAN VLAN tagged manner Label.
- 8. device according to any one of claims 5 to 7, which is characterized in that the convergence forwarding unit includes following At least one：Optical line terminal OLT, interchanger, router.
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| CN102546118A (en) * | 2012-03-12 | 2012-07-04 | 国家广播电影电视总局广播电视规划院 | Service forwarding and priority mapping method for China-data over cable system interface specification (C-DOCSIS) system |
| CN102624595A (en) * | 2012-03-12 | 2012-08-01 | 深圳市天威视讯股份有限公司 | Method for marking coaxial cable broadband access service data flow |
| CN102624561A (en) * | 2012-03-12 | 2012-08-01 | 国家广播电影电视总局广播电视规划院 | Management information (CDMM) packaging method based on IEEE (Institute of Electrical and Electronic Engineers) OAM (Operation Administration and Maintenance), C-DOCSIS (Data Over Cable Service Interface Specification) radio frequency interface module and system control module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2462751B1 (en) * | 2009-09-09 | 2013-06-05 | Broadcom Corporation | Ethernet passive optical network over coaxial (epoc) |
| CN102624560B (en) * | 2012-03-12 | 2016-06-29 | 深圳市天威视讯股份有限公司 | A kind of distributed deployment, centerized fusion CATV broadband access system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102546118A (en) * | 2012-03-12 | 2012-07-04 | 国家广播电影电视总局广播电视规划院 | Service forwarding and priority mapping method for China-data over cable system interface specification (C-DOCSIS) system |
| CN102624595A (en) * | 2012-03-12 | 2012-08-01 | 深圳市天威视讯股份有限公司 | Method for marking coaxial cable broadband access service data flow |
| CN102624561A (en) * | 2012-03-12 | 2012-08-01 | 国家广播电影电视总局广播电视规划院 | Management information (CDMM) packaging method based on IEEE (Institute of Electrical and Electronic Engineers) OAM (Operation Administration and Maintenance), C-DOCSIS (Data Over Cable Service Interface Specification) radio frequency interface module and system control module |
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