CN1878122A - Information insulating method and device for downlink broadcast, flood of Ethernet passive optical network - Google Patents
Information insulating method and device for downlink broadcast, flood of Ethernet passive optical network Download PDFInfo
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- CN1878122A CN1878122A CNA2005100748691A CN200510074869A CN1878122A CN 1878122 A CN1878122 A CN 1878122A CN A2005100748691 A CNA2005100748691 A CN A2005100748691A CN 200510074869 A CN200510074869 A CN 200510074869A CN 1878122 A CN1878122 A CN 1878122A
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Abstract
The invention discloses information separating method and optical path terminal of Ethernet passive light network descending broadcast and flood, which is characterized by the following: allocating relative information mating mode and memory mode; storing relative relationship of virtual LAN and member optical network unit in the virtual LAN; upgrading the relative relationship through cancellation mode; extracting virtual LAN mark of business frame band at broadcast and flood business disposal time; finding the relative member optical network unit with virtual LAN; enciphering the business when finding one member optical network unit; sending the business frame to single-broadcast channel of optical network unit. The invention can guarantee the safety of information according to single-broadcast duplicating disposal or regular pattern disposal, which improves safety of information for descending broadcast and flood business.
Description
Technical field
The present invention relates to EPON (Ethernet passive optical network, Ethernet Passive OpticalNetwork), more specifically, relate to the information insulating method and the corresponding optical line terminal of downlink broadcast, flooded traffic in this network.
Background technology
Along with rapid growth and the development of optical communication technique and the reduction of cost of Access Network to the service bandwidth demand, optical fiber communication is transparent to business with it, life-span is long, the bandwidth bearing capacity is almost unlimited, the characteristics that can adapt to ever-increasing bandwidth and new business growth requirement, become the important way that access layer network is built, " light advances copper and moves back ", optical node progressively moves down, FTTP (FTTP:Fiber To The Premise), Fiber To The Building (FTTB:Fiber To The Building), Fiber-To-The-Office (FTTO:FiberTo The Office) and optical fiber have become the inexorable trend of access layer network development until to family (FTTH:Fiber To The Home).
In this process, the passive optical access network network disturbs, saves advantages such as computer room construction cost and reduction operation maintenance expense with its passive pressure of not powering, good environmental adaptability, no electromagnetism thunder and lightning, can finely satisfy the demand that access layer network is built, especially the appearance of EPON technology, making becomes the important way of the construction of optical access network of new generation based on the passive optical access network of EPON technology.
EFM (the junior one kilometer working group of Ethernet, Ethernet in First Mile) the IEEE802.3ah EPON technology of project team's exploitation, owing to kept compatibility with the ethernet local area network network of extensively laying at present and hundreds of millions of terminal Ethernet interface standards, thereby obtained widely supporting have many equipment producers and chip manufacturing commercial city to release EPON chip and equipment at present based on IEEE802.3ah.
The EPON technology is the transmission technology of a kind of point to multiple spot, by PON (EPON, PassiveOptical Network) and Ethernet protocol be combined to form, adopt the ethernet frame structure of standard, put asymmetric media that multiple spot is based on tree-shaped (or tree and branch) topology.The data terminal equipment that is connected on the trunk is called optical line terminal (OLT:Optical Line Terminal), and the data terminal equipment that is connected on the branch is called optical network unit (ONU:Optical Network Unit).OLT generally places service provider's one side, and ONU generally is placed on user's one side., when ONU powers on, can register to OLT, OLT is by DBA (dynamic bandwidth adjustment, Dynamic Bandwidth Aujestment) algorithm distributes a logical links sign (LLID, Logic Link Identification) for each ONU, and distributes corresponding up transmission time slot.
For uplink service, no matter be clean culture, broadcasting or inundation frame, all can be placed into the transmission time slot of distributing to this ONU, and on leading, stamp this logical links sign, belong to several ONU time division multiplexing data feedback channels, there is not information security issue in uplink service, need not to encrypt.
For downlink business, clean culture and broadcasting, inundation are separate processes, for unicast frame (non-inundation processing), it is packaged into Ether frame, and at the leading logical links sign that needs to receive this professional ONU correspondence of stamping, send then, belong to the statistic multiplexing down going channel, all ONU can both receive all business on the down going channel, in order to prevent the unicast service leakage of information, professional encrypted, have only corresponding ONU that key is just arranged.
For broadcasting service and flooded traffic, then adopt the unified broadcasting special logic link channel of whole down going channel, business just can not be encrypted like this, all ONU websites can both receive broadcasting service and flooded traffic, even these business are not to issue its, the Information Security of broadcasting service and flooded traffic just can't guarantee like this.Therefore need in EPON, realize a kind of descending transfer approach that can in some specific application scenario, guarantee the information security of broadcasting service and flooded traffic.The present invention proposes the professional partition method of a kind of EPON of being used for downlink broadcast, inundation for this reason.
Summary of the invention
The technical problem to be solved in the present invention provides the information insulating method of a kind of Ethernet passive optical network downlink broadcast, inundation, can improve the information security of downlink broadcast, flooded traffic.The present invention also will provide a kind of optical line terminal of realizing this method.
In order to solve the problems of the technologies described above, the invention provides the information insulating method of a kind of Ethernet passive optical network downlink broadcast, inundation, may further comprise the steps:
(a) dispose on optical line terminal and preserve in its service range, VLAN belongs to the incidence relation of member's optical network unit of this VLAN with the user is arranged, and nullifies the back at optical network unit its incidence relation is upgraded;
(b) described optical line terminal is being broadcasted when handling with flooded traffic, at first extracts the sign of the VLAN of traffic frame band, finds the member optical network unit related with this VLAN;
(c) number of member's optical network unit of judgement association when having only one, is encrypted business, sends this traffic frame then from the unicast channel of distributing to this optical network unit.
Further, said method also can have following characteristics: be that the contingency table that comprises following list item is configured and preserves in the step (a): the tabulation of VLAN sign, member's optical network unit and member's optical network unit number, the member's optical network unit wherein logical links sign when registering is represented.
Further, said method also can have following characteristics: it is as follows to the update mode of its incidence relation that optical network unit is nullified the back: described optical line terminal detects the state of connected each optical network unit, canceled as this optical network unit, then travel through described contingency table, comprise this optical network unit of deletion the member's optical network unit tabulation of this optical network unit from all, and these member's optical network units pairing member's optical network unit number of tabulating is subtracted 1.
Further, said method also can have following characteristics: step (a) has also disposed broadcasting, the inundation forward mode of each VLAN correspondence, comprises that unicast channel sends and broadcast channel sends two options; Step (b) also extracts broadcasting, the inundation forward mode of VLAN correspondence; Step (c) has when a plurality of at member's optical network unit, judge broadcasting, the inundation forward mode that extracts again, if for unicast channel sends, then duplicate the professional copy of corresponding number, to from the unicast channel of distributing to these optical network units, sending this traffic frame after the business encryption one by one, if for broadcast channel sends, then broadcasting, the inundation processing mode with standard sends this traffic frame from broadcast channel.
Further, said method also can have following characteristics: in the step (a), the traffic frame that described member's optical network unit tabulation and member's optical network unit number list item are received according to the EPON interface disposes, and the method for this configuration may further comprise the steps:
I) after optical line terminal is received traffic frame from the EPON interface, therefrom extract logical links sign and VLAN sign;
Ii) be masked as index finds coupling in described contingency table clauses and subclauses, from these clauses and subclauses, extract the information of its member's optical network unit tabulation with VLAN;
Iii) judge in this member's optical network unit tabulation whether have the logical links sign that extracts,, in this tabulation, add the logical links sign of this extraction if do not have, and member's optical network unit number of this VLAN correspondence added 1, finish, otherwise, directly finish.
Further, said method also can have following characteristics: step (c) has when a plurality of as the member's optical network unit that finds, then duplicate the professional copy of corresponding number, from the unicast channel of distributing to these optical network units, send this traffic frame after business is encrypted one by one; Perhaps, broadcasting, the inundation processing mode with standard sends this traffic frame from broadcast channel.
Further, said method also can have following characteristics: step (c) is 0 as the member's optical network unit number that finds, and then abandons this traffic frame.
The present invention also provides a kind of optical line terminal of realizing said method, comprise and be used for receiving the receiving processing module of traffic frame and sending downlink broadcast, the flooded traffic processing module of traffic frame to the EPON interface from the EPON interface, it is characterized in that, also comprise related information configuration module, related information memory module and nullify module, wherein:
Described related information configuration module is used to dispose in this optical line terminal service range, VLAN with have the user to belong to the incidence relation of member's optical network unit of this VLAN;
Described related information memory module is used to preserve the VLAN of described related information configuration module configuration and the incidence relation between member's optical network unit thereof;
Described cancellation module is used for after optical network unit is nullified, and upgrades this optical network unit preserved in the described related information memory module and the incidence relation of respective virtual local area network (LAN);
Described downlink broadcast, flooded traffic processing module further comprise:
Information extraction unit is used for finding the member optical network unit related with this VLAN from the sign of downlink business frame extraction VLAN in described related information memory module, gives judgement and transmitting element and handles; And
Adjudicate and transmitting element, be used to judge the number of the member's optical network unit that finds, when having only 1 member's optical network unit, business is encrypted, from the unicast channel of distributing to this optical network unit, send this traffic frame then.
Further, above-mentioned optical line terminal also can have following characteristics: described related information configuration module is that a contingency table that comprises following list item is configured: the tabulation of VLAN sign, member's optical network unit and member's optical network unit number, the described member's optical network unit logical links sign when registering is represented.
Further, above-mentioned optical line terminal also can have following characteristics: described cancellation module is after optical network unit is nullified, travel through described contingency table, this optical network unit is deleted from all VLAN clauses and subclauses, and the member's optical network unit number that will delete the clauses and subclauses of this optical network unit subtracts 1.
Further, above-mentioned optical line terminal also can have following characteristics: described judgement and transmitting element also are used for when finding a plurality of member's optical network unit, duplicate the professional copy of corresponding number, from the unicast channel of distributing to these optical network units, send this traffic frame after business is encrypted one by one; Perhaps, described judgement and transmitting element also are used for when finding a plurality of member's optical network unit, send this traffic frame with broadcasting, the inundation processing mode of standard from broadcast channel.
Further, above-mentioned optical line terminal also can have following characteristics: described related information configuration module has also disposed the list item of a broadcasting, inundation forward mode in described contingency table, and this list item comprises that unicast channel sends and two options of broadcast channel transmission; Described information extraction unit also extracts broadcasting, the inundation forward mode of VLAN correspondence and gives judgement and transmitting element; Described judgement and transmitting element are when member's optical network unit has a plurality of and be configured to the unicast channel transmission, duplicate the professional copy of corresponding number, to from the unicast channel of distributing to these optical network units, sending this traffic frame after the business encryption one by one, have a plurality of and be configured to broadcast channel when sending at member's optical network unit, send this traffic frame from broadcast channel with broadcasting, the inundation processing mode of standard.
Further, above-mentioned optical line terminal also can have following characteristics: described receiving processing module comprises the sign extraction unit, is used for extracting the sign and the logical links sign of the VLAN of the traffic frame of receiving; And sign adding device, be used to retrieve described contingency table, when in member's optical network unit tabulation of this VLAN correspondence, not having identical logical links sign, this logical links is added in this tabulation, and member's optical network unit number of this VLAN correspondence is added 1.
As from the foregoing, the inventive method makes and is adopting Vlan user-isolated that each ONU distributes one, and independently the application scenario user's of Vlan broadcasting, inundation information security can access good assurance.Further, stride under the occasion of a plurality of ONU for a Vlan, can to broadcasting in this case, the clean culture replication processes that flooded traffic enforcement can ensure information security, perhaps implement conventional processing by the broadcasting of this Vlan, the configuration of inundation forward mode.
Description of drawings
Fig. 1 is the processing block diagram of embodiment of the invention PON broadcasting inundation information insulating method.
Fig. 2 is that embodiment of the invention OLT side PON interface receives handling process.
Fig. 3 is embodiment of the invention OLT side PON interface downlink broadcast, flooded traffic process chart.
Fig. 4 is that the ONU of embodiment of the invention OLT side nullifies handling process.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical solution of the present invention:
In an EPON network, an OLT is connected with several ONU, these ONU with the user between adopt Vlan (Virtual Local Area Network, VLAN) as the means of user isolation, an ONU can be with a plurality of users, therefore can think that each user of each ONU is assigned with 1 independently Vlan ID (Virtual Local Area Network Identification, VLAN sign).For Ethernet service, Vlan has the effect of broadcasting, inundation isolation, that is to say that the broadcasting of certain Vlan, inundation frame are merely able to be transmitted to the user with identical Vlan.
Under some application scenarios, each user of each ONU belongs to different Vlan, so OLT is to issue certain specific ONU's certainly when sending broadcasting, flooded traffic.This broadcasting, flooded traffic send to all ONU with regard to there is no need by the broadcast channel of sharing, therefore in the present invention this type of broadcasting, inundation frame are just no longer sent by the broadcast channel of sharing, but transmit as the pattern of a unicast frame, business just can be encrypted like this, and other ONU just can't discern.
Under other application scenarios, may exist some Vlan to stride ONU, that is to say that several ONU belong to same Vlan, just need send when OLT sends broadcasting, inundation in this Vlan like this to a plurality of ONU, at this moment can adopt dual mode: a kind of mode is exactly EPON broadcasting, the inundation processing method of standard, some broadcasting, inundation frame that need send to a plurality of ONU then still sends by broadcast channel, and information security can't guarantee; Another mode is exactly the pattern transmission as a unicast frame, the logical links passage of ONU is distributed in employing, but because broadcasting, an inundation frame need send to several ONU, therefore need duplicate at OLT, need send to several ONU, just need do several times and duplicate.
In order to realize above-mentioned processing mode, as shown in Figure 1, the optical line terminal of present embodiment comprises following correlation module: Vlan ID-ONU contingency table memory module, Vlan ID-ONU contingency table configuration module, the receiving processing module of PON interface, the downlink broadcast of PON interface, flooded traffic processing module and ONU nullify module.Wherein:
Described Vlan ID-ONU contingency table memory module is used to store Vlan ID-ONU contingency table, and this contingency table comprises following list item: Vlan ID, the broadcasting of this Vlan, inundation forward mode sign belong to all member ONU tabulations of this Vlan, member ONU number.
Table 1 is the Vlan ID-ONU contingency table of an example, always has 4095 clauses and subclauses, represents Vlan1 respectively to Vlan4095, and following table only shows wherein 2 clauses and subclauses, Vlan20 and Vlan25.
Table 1 Vlan ID-ONU contingency table;
| ?Vlan?ID | Broadcasting, inundation forward mode | Member ONU tabulation | Member ONU number |
| ?20 | The unicast channel sending mode | ?18 | ?1 |
| ?25 | The broadcast channel sending mode | ?5，10 | ?2 |
Broadcasting wherein, inundation forward mode are that the interior broadcasting of this Vlan, flooded traffic are as unicast service processing or the sign of handling by broadcast channel as the broadcasting service of standard.The logical links sign that member ONU obtains when registering with this ONU is represented.
Described Vlan ID-ONU contingency table configuration module is used to set up Vlan ID-ONU contingency table, and broadcasting, two list items of inundation forward mode sign of Vlan ID in the contingency table and Vlan are carried out manual configuration, to satisfy various demands.It is empty that all member ONU tabulation, two list items of member ONU number that belong to this Vlan power on when initial, receives processing module by the OLT side joint and dynamically adds according to the Vlan ID of the traffic frame band that receives and the related situation of logical links sign.
EPON user can have two kinds of pattern: A, need not authentification of user, powers on and can surf the Net.B must could surf the Net such as the IEEE802.1X authentication by authentification of user.For Mode A, after the user powered on, OLT side PON interface can receive business, and for Mode B, the user is by after authenticating, and OLT side PON interface can receive business.
The receiving processing module of described PON interface further comprises: the sign extraction unit is used for from traffic frame extraction logic link sign (ONU of a logical links sign sign) and Vlan ID; And sign adding device, the Vlan ID that is used for to extract is an indexed search Vlan ID-ONU contingency table, find the logical links sign that extracts all members in its member ONU tabulation after the respective entries, whether judgement wherein has sign identical with the logical links sign that extracts, if have, represent that so this Vlan ID has finished with the related of ONU, needn't add again, otherwise the logical links sign that extracts is added in the member ONU tabulation of this Vlan, and member ONU number is added 1.
The downlink broadcast of described PON interface, flooded traffic processing module further comprise:
Information extraction unit, be used for receiving broadcasting and flooded traffic from higher level's network at OLT, when carrying out PON interface downlink processing, from traffic frame, extract Vlan ID, and with Vlan ID is indexed search Vlan ID-ONU contingency table, find corresponding clauses and subclauses, extract logical links sign and the member ONU number of all members in broadcasting inundation forward mode, the member ONU tabulation of this Vlan.
Judgement and transmitting element are used for sending then according to the professional descending send mode that should adopt of information judgement that extracts, and the decision rule that present embodiment adopts is as follows:
If member ONU number is 0, then abandon this business.
If member ONU number is 1, then this business is encrypted the back to business and send this traffic frame from the unicast channel of distributing to this ONU as the EPON clean culture processing mode of standard.
If member ONU number greater than 1 and broadcasting, the inundation forward mode of this Vlan be that unicast channel sends, then duplicate the professional copy of corresponding number according to member ONU number, after the business encryption, from the unicast channel of distributing to these ONU, send this traffic frame one by one.
If member ONU number greater than 1 and broadcasting, the inundation forward mode of this Vlan be that broadcast channel sends, then this business sends this traffic frame as EPON broadcasting, the inundation processing mode of standard from broadcast channel.
Described ONU nullifies module, be used for initiatively nullifying or OLT when regularly detecting ONU state failure and thinking that ONU has nullified at ONU, scan whole Vlan ID-ONU contingency table, this ONU is deleted from all Vlan clauses and subclauses, and the member ONU number of this clauses and subclauses correspondence is subtracted 1.
The flow process of embodiment of the invention method is described below, and as shown in Figure 2, the reception handling process of OLT side PON interface may further comprise the steps:
Step 130 is an index search Vlan ID-ONU contingency table with Vlan i, because contingency table has comprised all Vlan clauses and subclauses of 1-4095, therefore is bound to match clauses and subclauses, is assumed to be clauses and subclauses j;
Step 140 is extracted member ONU list information from the clauses and subclauses j of Vlan ID-ONU contingency table;
Step 160 judges whether to match member ONU (referring to that this ONU has identity logic link sign), if, represent that then this ONU is related with this Vlan, finish, otherwise carry out next step;
Step 170 increases this new member ONU (promptly adding LLID i) in member's tabulation of the clauses and subclauses j of Vlan ID-ONU contingency table.
As shown in Figure 3, the downlink broadcast of OLT side PON interface, flooded traffic handling process may further comprise the steps:
Step 230 is extracted broadcasting, inundation forward mode from the clauses and subclauses that retrieve, all members and member ONU number in the member ONU tabulation;
Step 240 is judged member ONU number, if be 0, carries out next step, if be 1, and execution in step 260, if greater than 1, execution in step?
Step 250 abandons this business, and OLT thinks does not have ONU member in this Vlan, therefore thinks that this traffic frame is illegal, does discard processing, finishes;
Step 270 sends this business from the unicast channel of this ONU, and the leading logical links sign of distributing to this ONU of stamping finishes;
Step 280 is judged broadcasting, the inundation forward mode of this Vlan, if the broadcast channel sending mode is carried out next step, if the unicast channel sending mode, execution in step 300;
Step 290 sends this business from broadcast channel, and broadcast channel is the passage that all ONU share, and business can not be encrypted, and all ONU can receive this business, finishes;
As shown in Figure 4, the handling process of the ONU of OLT side cancellation may further comprise the steps:
Step 440 judges whether all ONU finish dealing with, if do not have, returns step 410 and continues to detect, if finish dealing with, finishes.
In sum, method of the present invention is a kind of EPON downlink broadcast that effectively is used for, the information insulating method of inundation, this method has disposed the Vlan table in system, identified the broadcasting in this Vlan, inundation is handled sign, when receiving business, extracts ONU VlanID and logical links sign at OLT side PON interface, Vlan ID and ONU are associated, when OLT side direction ONU sends broadcasting and flooded traffic, Vlan ID according to the traffic frame that sends, search the broadcasting in this Vlan, inundation is handled sign, handle the number of member ONU in sign and this Vlan according to this, to this broadcasting, the copying encrypted back of flooded traffic frame sends or sends from broadcast channel from unicast channel.
The inventive method makes and is adopting Vlan user-isolated that each ONU distributes one, and independently the application scenario user's of Vlan broadcasting, inundation information security can access good assurance.Stride under the occasion of a plurality of ONU for a Vlan, can broadcasting, inundation by this Vlan handle sign, the policy selection of the processing of clean culture replication processes that enforcement can ensure information security or the routine that can not ensure information security can be provided broadcasting, inundation in this case.
Though the information insulating method of EPON broadcasting of the present invention, inundation is illustrated and describes, clearly the present invention is unrestricted.Under the condition that does not depart from by the determined the spirit and scope of the present invention of appended claims book, those skilled in the art will can take into account many corrections, replacing, variation, substitute and equivalent content.
For example, the configuration of Vlan ID-ONU contingency table of the present invention is not limited to the mode that embodiment proposes, in another embodiment, broadcasting, two list items of inundation forward mode sign to Vlan ID in the contingency table and Vlan also can be finished configuration by system automatically according to setting rule, perhaps, manual configuration mode and/or nullify all fields in this contingency table.
And for example, in another embodiment, member ONU has and only sends on a kind of passage when a plurality of in Vlan, can be unicast channel or broadcast channel.At this moment, need not in Vlan ID-ONU contingency table, to broadcast, the configuration of inundation forward mode, also need not when sending, to distinguish.
Claims (13)
1, the information insulating method of a kind of Ethernet passive optical network downlink broadcast, inundation may further comprise the steps:
(a) dispose on optical line terminal and preserve in its service range, VLAN belongs to the incidence relation of member's optical network unit of this VLAN with the user is arranged, and nullifies the back at optical network unit its incidence relation is upgraded;
(b) described optical line terminal is being broadcasted when handling with flooded traffic, at first extracts the sign of the VLAN of traffic frame band, finds the member optical network unit related with this VLAN;
(c) number of member's optical network unit of judgement association when having only one, is encrypted business, sends this traffic frame then from the unicast channel of distributing to this optical network unit.
2, information insulating method as claimed in claim 1, it is characterized in that, be that the contingency table that comprises following list item is configured and preserves in the step (a): the tabulation of VLAN sign, member's optical network unit and member's optical network unit number, the member's optical network unit wherein logical links sign when registering is represented.
3, information insulating method as claimed in claim 2, it is characterized in that, it is as follows to the update mode of its incidence relation that optical network unit is nullified the back: described optical line terminal detects the state of connected each optical network unit, canceled as this optical network unit, then travel through described contingency table, comprise this optical network unit of deletion the member's optical network unit tabulation of this optical network unit from all, and these member's optical network units pairing member's optical network unit number of tabulating is subtracted 1.
4, information insulating method as claimed in claim 1 or 2 is characterized in that, step (a) has also disposed broadcasting, the inundation forward mode of each VLAN correspondence, comprises that unicast channel sends and broadcast channel sends two options; Step (b) also extracts broadcasting, the inundation forward mode of VLAN correspondence; Step (c) has when a plurality of at member's optical network unit, judge broadcasting, the inundation forward mode that extracts again, if for unicast channel sends, then duplicate the professional copy of corresponding number, to from the unicast channel of distributing to these optical network units, sending this traffic frame after the business encryption one by one, if for broadcast channel sends, then broadcasting, the inundation processing mode with standard sends this traffic frame from broadcast channel.
5, information insulating method as claimed in claim 2, it is characterized in that, in the step (a), the traffic frame that described member's optical network unit tabulation and member's optical network unit number list item are received according to the EPON interface disposes, and the method for this configuration may further comprise the steps:
I) after optical line terminal is received traffic frame from the EPON interface, therefrom extract logical links sign and VLAN sign;
Ii) be masked as index finds coupling in described contingency table clauses and subclauses, from these clauses and subclauses, extract the information of its member's optical network unit tabulation with VLAN;
Iii) judge in this member's optical network unit tabulation whether have the logical links sign that extracts,, in this tabulation, add the logical links sign of this extraction if do not have, and member's optical network unit number of this VLAN correspondence added 1, finish, otherwise, directly finish.
6, information insulating method as claimed in claim 1 or 2, it is characterized in that, step (c) has when a plurality of as the member's optical network unit that finds, and then duplicates the professional copy of corresponding number, sends this traffic frame after business is encrypted one by one from the unicast channel of distributing to these optical network units; Perhaps, broadcasting, the inundation processing mode with standard sends this traffic frame from broadcast channel.
7, information insulating method as claimed in claim 1 or 2 is characterized in that, step (c) is 0 as the member's optical network unit number that finds, and then abandons this traffic frame.
8, a kind of optical line terminal, comprise and be used for receiving the receiving processing module of traffic frame and sending downlink broadcast, the flooded traffic processing module of traffic frame to the EPON interface from the EPON interface, it is characterized in that, also comprise related information configuration module, related information memory module and nullify module, wherein:
Described related information configuration module is used to dispose in this optical line terminal service range, VLAN with have the user to belong to the incidence relation of member's optical network unit of this VLAN;
Described related information memory module is used to preserve the VLAN of described related information configuration module configuration and the incidence relation between member's optical network unit thereof;
Described cancellation module is used for after optical network unit is nullified, and upgrades this optical network unit preserved in the described related information memory module and the incidence relation of respective virtual local area network (LAN);
Described downlink broadcast, flooded traffic processing module further comprise:
Information extraction unit is used for finding the member optical network unit related with this VLAN from the sign of downlink business frame extraction VLAN in described related information memory module, gives judgement and transmitting element and handles; And
Adjudicate and transmitting element, be used to judge the number of the member's optical network unit that finds, when having only 1 member's optical network unit, business is encrypted, from the unicast channel of distributing to this optical network unit, send this traffic frame then.
9, optical line terminal as claimed in claim 8, it is characterized in that, described related information configuration module is that a contingency table that comprises following list item is configured: the tabulation of VLAN sign, member's optical network unit and member's optical network unit number, the described member's optical network unit logical links sign when registering is represented.
10, optical line terminal as claimed in claim 9, it is characterized in that, described cancellation module is after optical network unit is nullified, travel through described contingency table, this optical network unit is deleted from all VLAN clauses and subclauses, and the member's optical network unit number that will delete the clauses and subclauses of this optical network unit subtracts 1.
11, optical line terminal as claimed in claim 8, it is characterized in that, described judgement and transmitting element also are used for when finding a plurality of member's optical network unit, duplicate the professional copy of corresponding number, from the unicast channel of distributing to these optical network units, send this traffic frame after business is encrypted one by one; Perhaps, described judgement and transmitting element also are used for when finding a plurality of member's optical network unit, send this traffic frame with broadcasting, the inundation processing mode of standard from broadcast channel.
12, optical line terminal as claimed in claim 9, it is characterized in that, described related information configuration module has also disposed the list item of a broadcasting, inundation forward mode in described contingency table, this list item comprises that unicast channel sends and two options of broadcast channel transmission; Described information extraction unit also extracts broadcasting, the inundation forward mode of VLAN correspondence and gives judgement and transmitting element; Described judgement and transmitting element are when member's optical network unit has a plurality of and be configured to the unicast channel transmission, duplicate the professional copy of corresponding number, to from the unicast channel of distributing to these optical network units, sending this traffic frame after the business encryption one by one, have a plurality of and be configured to broadcast channel when sending at member's optical network unit, send this traffic frame from broadcast channel with broadcasting, the inundation processing mode of standard.
13, optical line terminal as claimed in claim 9 is characterized in that, described receiving processing module comprises the sign extraction unit, is used for extracting the sign and the logical links sign of the VLAN of the traffic frame of receiving; And sign adding device, be used to retrieve described contingency table, when in member's optical network unit tabulation of this VLAN correspondence, not having identical logical links sign, this logical links is added in this tabulation, and member's optical network unit number of this VLAN correspondence is added 1.
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| CNB2005100748691A CN100454894C (en) | 2005-06-07 | 2005-06-07 | Information insulating method and device for downlink broadcast, flood of Ethernet passive optical network |
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| CNB2005100748691A CN100454894C (en) | 2005-06-07 | 2005-06-07 | Information insulating method and device for downlink broadcast, flood of Ethernet passive optical network |
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| CN1878122A true CN1878122A (en) | 2006-12-13 |
| CN100454894C CN100454894C (en) | 2009-01-21 |
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| WO2014198017A1 (en) * | 2013-06-09 | 2014-12-18 | 华为技术有限公司 | Method and device for virtualization passive optical network and passive optical network virtualization system |
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