CN103686471B - A kind of processing method of multi-service time slot, apparatus and system - Google Patents
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Abstract
The invention discloses a kind of processing method of multi-service time slot, apparatus and system, it is related to optical-fiber network technical field, the data for solving multislot services in the prior art are easily cracked in transmission, the poor technical problem of security.Wherein, this method includes：OLT is time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL；The TSID and TSL is broadcast to each ONU by down channel.The method of the present invention is mainly used in the multislot services in optical-fiber network.
Description
Technical field
The present invention relates to optical-fiber network technical field, more particularly to a kind of processing method of multi-service time slot, apparatus and system.
Background technology
In existing EPON (Ethernet Passive Optical Network, Ethernet passive optical network) system,
FTTH ONU（Intelligent acess is to family optical node）Require to provide in business to include speech, online, IPTV/CATV, electricity consumption meter reading
The information transfer channel of the aspect of information etc. at least four, is the integrated service pattern in terms of four net fusions.But four net fusions is comprehensive
It is QoS and information security issue that conjunction business transmission belt, which carrys out the problem of one very big,.
Traditional Ethernet realizes that QoS means are 802.1p, by the different priority of different traffic assignments come
Ensure the QoS of each business, many people take sth for granted：As long as indiscriminately imitating 802.1p, the QoS of EPON system is can be achieved with, and
EPON root problem is：Distribution of the OLT to system resource plays leading role, and in OLT sides, OLT is not handled directly
Unique foundation of 802.1p, OLT scheduling resource is LLID（Logical links marks）, and LLID is not encapsulate in ethernet frames
, so, EPON directly can not solve QoS using 802.1p.
Another bigger hidden danger of EPON is security, because EPON upstream datas are all the time by shared channel
Window is sent, if an ONU certain business datum is cracked, shared other business datums together are also broken simultaneously
Solution.
The problem for being really fully solved QoS is more LLID technologies, and each ONU can distribute multiple LLID, each LLID
A kind of corresponding data service, the ethernet frame for carrying different business are labeled with different LLID, and each LLID can obtain difference
The processing of priority.Mapping relations between multiple service ports and LLID as described in Figure 1, in more LLID technologies, different business
The business of port may map in same LLID labels.The multiple LLID transmitted in more LLID, and in this patent, transmission
Be multiple time slot ID and slot length.
But it is to interweave with carrying out during data transfer due to being indicated completely by LLID between multiple business in more LLID transmission
, not isolating, LLID is to use identical AES, if a LLID is cracked, other No. LLID
Also the AES that LLID is fallen in method decryption can be cracked with identical.
The content of the invention
In order to solve the data of multislot services in EPON system in the prior art transmission when be easily cracked, security compared with
The technical problem of difference, the present invention propose a kind of processing method of multi-service time slot, apparatus and system.
A kind of processing method of multi-service time slot, including：
OLT is time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL；
The TSID and TSL is broadcast to each ONU by down channel.
A kind of processing unit of multi-service time slot, including：
Distribute module, for for time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL；
Module is issued, for the TSID and TSL to be broadcast into each ONU by down channel.
A kind of processing system of multi-service time slot, including：OLT and multiple ONU；
The OLT, for for time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL, and will described in
TSID and TSL is broadcast to each ONU by down channel.
The ONU, the TSID and TSL of every kind of business of OLT broadcast are received for ONU, for any pre-transmission data
The business of frame, according to the TSID of business according to the TSL transmitting data frames of the business to OLT.
It is unit according to time particle using the upstream bandwidth for distributing ONU in the scheme that the present embodiment provides, makes every
The data frame of kind business is packaged in respective time interval, the technological means of every kind of traffic assignments certain time, is ensured
In time bandwidth（That is TSL (time slot length, slot length)) in, every kind of business is isolation in time, and
After the bandwidth of every kind of business has done division on a timeline, in the transmission time bandwidth of each business, also carried for each business
For the technological means of TSID (time slot ID, time slot mark), realize when using shared channel transmission data, every kind of business
All it is placed in a time slot ID and transmits, is not in intertexture physically, that is to say, that different time-gap passes different business, but not
With the purpose between time slot being physically isolation.Its effect is：1st, cracker does not just know the starting of each frame completely, it is difficult to broken
Solution.And OLT can then come out according to the bandwidth time oneself distributed to distinguish each business start frame；2 and when making some
Gap is cracked, because in this window, different business is not in interweave, and the time slot in next time window can be adjusted
Whole initial time, cracker need re-synchronization again, then the difficulty cracked increases.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.In the accompanying drawings：
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the schematic diagram of mapping relations between multiple service ports and LLID in background technology；
Fig. 2 is a kind of flow chart of the processing method for multi-service time slot that the embodiment of the present invention 1 provides；
Fig. 3 is the schematic diagram of the upstream bandwidth distribution for the time interval that the embodiment of the present invention 1 provides；
Fig. 4 is a kind of structural representation of the processing unit for multi-service time slot that the embodiment of the present invention 1 provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.Also, following embodiment is the alternative of the present invention, embodiment
Put in order and the numbering of embodiment is unrelated with the order that it preferably is carried out.
Embodiment 1
The present embodiment provides a kind of processing method of multi-service time slot, as shown in Fig. 2 including：
Step 101, OLT（Opticallineterminal, optical line terminal）For time slot mark corresponding to every kind of traffic assignments
Know TSID and slot length TSL.
In preferred scheme, the step is that OLT is every kind of traffic assignments TSID, and is each TSID mean allocations TSL.
Specifically, as shown in figure 3, being directed to every kind of different business, OLT is that ONU distributes a kind of TSID.ONU some when
Between in window, as time0 distributes TSID0, entirely business 0 data frame, entirely time1 distribution TSID1, business 1 in figure
Data frame, time2 distribute TSID2, entirely business 2 data frame ...
Especially, in the present embodiment, the size for distributing to the data field of every kind of business is measured by time granularity, often
The data field time n of middle business length is TSL, i.e., distributes to the bandwidth of every kind of business with the length TSL of time slot to represent.
Wherein, minimum time granularity size is 20ns, and EPON uplink transmission rate is 1.25GBPS, can actually be transmitted in 20ns
Data volume=1.0gbps*20=20bit.OLT is that ONU distribution bandwidth is a dynamic process, is just started, OLT gives each ONU
TSID mean allocations TSL.Afterwards by OLT dynamic bandwidth（DBA）Algorithm distributes, such as：If OLT has found certain business
TSL has been used up every time, it was demonstrated that the service traffics are big, and OLT needs to increase the TSL of the business, if OLT has found certain business
TSL is not finished for a long time, but has filling data, shows business TSL surpluses, and OLT needs to reduce the TSL of the business, specifically
It can refer to the preferred scheme after following step 105.
Step 102, TSID and TSL is broadcast to each ONU by OLT by down channel.
All business its corresponding TSID and TSL pass through the down channel broadcast transmission in EPON by OLT.
Step 103, after each ONU is received and recorded the TSID and TSL of every kind of business of OLT broadcast, each ONU connects for it
The business of any pre-transmission data frame received, according to the TSID of business according to the TSL transmitting data frames of the business to OLT.
The bandwidth unit that OLT distributes to ONU miscellaneous services is ns, is no longer that byte is unit.ONU sends upstream data
When, the data frame of the duration of this business is sent according to the TSL of this kind of business successively, after a kind of business datum duration has been sent,
Then according to a kind of data frame of the data duration of business under a kind of TSL transmissions of lower business.
Step 104, OLT receives the data frame of the miscellaneous service from each ONU with reference to TSID and TSL.
Step 105, in the upstream direction, the data frame of species business is assigned to pair by OLT according to the TSID of every kind of business
It is sent in the service queue answered etc. on Network processing port corresponding with the class of business.
What the present embodiment provided distributes time slot bandwidth according to business（That is TSL）Distribution method in, when ONU is according to this
The TSL slot allocation methods of business send the data frame of business, and OLT receives the number that ONU sends according to the TSL of the business
After frame, the data frame of different time-gap, that is, different business is sent to the business team of different Network processing ports
In row, wait and be sent to network service processing port.Therefore on the port of every kind of business, due to no longer occurring it not being at the business
The data frame of port is managed, also corresponds to do physical isolation to the business, improves the security of uplink business data transmission.
In up direction, OLT classifies the data frame that different business time slot is sent according to TSID, into different industry
Business queue, different network service is then sent to by different 1000BASE MAC and handled on port.Such as：With TSID0 generations
Table electricity consumption gathers information, and OLT is sent into the TSID0 received in queue 0, and queue 0 is accessed by network link layer MAC protocol
Onto the virtual router master of national grid.
In the downstream direction, OLT receives the data frame that different 1000BASE MAC Networks processing ports send over,
And the data frame of miscellaneous service is done into service combining, different business is merged into down queue, finally in down queue
The data frame of miscellaneous service be sent to EPON MAC, be transferred to each ONU using optical fiber.Such as：China Mobile is represented with TSID1
Internet data business, the queue business are directly connected on China Mobile's router.
In preferred scheme, present invention additionally comprises following process：Receive the miscellaneous service from each ONU data frame it
Afterwards, OLT is directed to any kind business, whether detects the TSL shared by the data frame of business with distributing to the TSL phases of the business
Together；If detecting, the TSL shared by the data frame of business is fewer than the TSL for distributing to the business, and the business is distributed in reduction
TSL；If detect the ratios of the TSL shared by the data frame of business distribute to the business TSL it is identical, increase distribute to the business
TSL。
Specifically, after OLT receives the frame format that ONU is sended over, examining the TSL and TSL distributed of every kind of business is
No identical, if detect that the TSL of certain business is used up every time, OLT gives the ONU overabsorption TSL, if OLT is detected
TSL to certain business has in residue, that is, data frame and has filling data, then starts to reduce the TSL of the business, so dynamically follow
Ring goes down, until the TSL efficiency of every kind of business reaches optimal.
It is unit according to time particle using the upstream bandwidth for distributing ONU in the method that the present embodiment provides, it is every kind of
The data frame of business is packaged in respective time interval, the technological means of every kind of traffic assignments certain time, is ensured
In time bandwidth（That is TSL (time slot length, slot length)) in, every kind of business is isolation in time, and often
After the bandwidth of kind business has done division on a timeline, in the transmission time bandwidth of each business, also provided for each business
TSID (time slot ID, time slot mark) technological means, realize that every kind of business is all when using shared channel transmission data
It is placed in a time slot ID and transmits, be not in intertexture physically, that is to say, that different time-gap passes different business, but different
It is physically the purpose of isolation between time slot.So have the advantage that：1st, cracker does not just know the starting of each frame completely,
It is difficult to crack.And OLT can then come out according to the bandwidth time oneself distributed to distinguish each business start frame；2 and make
Some time slot is cracked, because in this window, different business is not in interweave, in next time window when
Gap can adjust initial time, and cracker needs re-synchronization again, then the difficulty cracked increases.
After if the method that the present embodiment provides comes into operation, it can be opened by configuring come compatible EPON frame structures at present
Dynamic multi-slot partition program, then be multislot transmission, is still traditional single LLID EPON after closing the function.
Embodiment 2
Realized for the ease of the method on OLT in embodiment 1, the present embodiment provides a kind of processing dress of multi-service time slot
Put, as shown in figure 4, including：Distribute module 21, issue module 22.
Distribute module 21, for for time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL；
Module 22 is issued, for TSID and TSL to be broadcast into each ONU by down channel.
Wherein, distribute module 21, specifically for for every kind of traffic assignments TSID, and it is each TSID mean allocations TSL.
Further, the device also includes：Receiving module 23, isolation module 24, detection module 25, adjusting module 26.
Receiving module 23, for receiving the data frame of the miscellaneous service from each ONU.
Isolation module 24, for the TSID according to every kind of business by the data frame of species business be assigned to corresponding to business team
It is sent in row etc. on Network processing port corresponding with the class of business.
Detection module 25, for receive the miscellaneous service from each ONU data frame after, for any kind industry
Whether identical with distributing to the TSL of the business business, detect the TSL shared by the data frame of business.
Adjusting module 26, if for detecting that the TSL shared by the data frame of business is fewer than the TSL for distributing to the business,
Then reduce the TSL for distributing to the business；If detecting, the ratios of the TSL shared by the data frame of business distribute to the TSL phases of the business
Together, then the TSL of the business is distributed in increase.
In the device that the present embodiment provides, time-bands are done by using to the different business in the up optical link bandwidth of EPON
Width division, it is the certain time slot bandwidth TSL of every kind of traffic assignments, is that the time slot of every kind of business distributes a time slot ID, facilitates OLT
The technological means of different business is received according to TSID and TSL.Realize that more complete technologies of LLID in EPON of inheriting overcome QoS side
The advantages of face, multi-slot partitioning technology can also overcome QoS problems as more LLID.Also, in terms of information security, when more
The benefit of gap division is that the time slot of different business is being dynamic change at different moments, and this greatly improves EPON information securities
Degree.Even if cracker has cracked the time slot of some business, in next time slot, he needs to do time synchronized again again, again
Measure the slot length of this business.And in more LLID systems, if cracking the LLID of a business, in next time slot
LLID follow the prescribed rules and can crack.Simultaneously as the time slot of different business does not interweave in time, the benefit done so is
What time slot was physically entirely isolated, even if some time slot is cracked, and remaining time slot is still safe, because one
In individual transmission window, after some time slot past, just all biography is over the business datum, will not occur the industry again in this window
The data of business, cracker are difficult that study summary cracks rule.
The products such as the said equipment or device provided in an embodiment of the present invention be belong to using the flow and method of computer program as
Foundation, and consistent mode is corresponded to completely according to each step with method flow in embodiment of the method 1 and/or accompanying drawing, provided
Functional module.And because this functional module is the software service realized by way of computer program, so for
The functional module that device embodiment 2 is not specifically mentioned, due to consideration that the content recorded according to above method embodiment is sufficient
Each process step for enough making those skilled in the art be recorded from method determines to realize that step must be built directly, expectedly
Vertical functional module, so will not be described here.
Embodiment 3
The present embodiment continues to provide a kind of processing system of multi-service time slot, including：OLT and multiple ONU；
OLT, for for time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL, and TSID and TSL are led to
Cross down channel and be broadcast to each ONU.
ONU, the TSID and TSL of every kind of business of OLT broadcast are received for ONU, for any pre-transmission data frame
Business, according to the TSID of business according to the TSL transmitting data frames of the business to OLT.
It is unit according to time particle using the upstream bandwidth for distributing ONU in the system that the present embodiment provides, it is every kind of
The data frame of business is packaged in respective time interval, the technological means of every kind of traffic assignments certain time, is ensured
In time bandwidth（That is TSL (time slot length, slot length)) in, every kind of business is isolation in time, and often
After the bandwidth of kind business has done division on a timeline, in the transmission time bandwidth of each business, also provided for each business
TSID (time slot ID, time slot mark) technological means, realize that every kind of business is all when using shared channel transmission data
It is placed in a time slot ID and transmits, be not in intertexture physically, that is to say, that different time-gap passes different business, but different
It is physically the technique effect of isolation between time slot.
The OLT that said system provided in an embodiment of the present invention includes be based on embodiment 2 provide device and
Get, therefore the device in embodiment 2 is referred in place of not being described in detail to the greatest extent, will not be described here.
Technical scheme is in other words substantially the shape with software product to the part that prior art contributes
The function that formula embodies, in other words：The side of the device of the present invention, each equipment of equipment or composition system performed by it
Even if method or the function body of realization are hardware, but the part of the actually above-mentioned function of the realization present invention is computer software
The module or unit of product.It is soft such as computer and the computer software product is storable in the storage medium that can be read
Disk, hard disk or CD etc., including some instructions are causing method that equipment performs each embodiment of the present invention.
More than, it is only embodiment of the invention, but the present invention can have a variety of various forms of embodiments,
The present invention is done above in association with accompanying drawing for example, this is not meant to that the embodiment that the present invention is applied can only limit to
In these specific embodiments, those skilled in the art is it is to be appreciated that embodiment presented above
Simply some examples in a variety of preferred embodiments, any embodiment for embodying the claims in the present invention all should be at these
Within the scope of invention claim is claimed；Those skilled in the art can be to institute in each embodiment above
The technical scheme of record is modified, or carries out equivalent substitution to which part technical characteristic.It is all the present invention spirit and
Within principle, any modification, equivalent substitution or improvement for being made etc., the protection domain of the claims in the present invention should be included in
Within.
Claims (2)
- A kind of 1. processing method of multi-service time slot, it is characterised in that including：OLT is time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL：The TSID and TSL is broadcast to each ONU by down channel：The OLT is time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL, is specifically included：OLT is every kind of traffic assignments TSID, and is each TSID mean allocations TSL；This method also includes：OLT receives the data frame of the miscellaneous service from each ONU；Be sent in service queue corresponding to the data frame of species business is assigned to according to the TSID of every kind of business etc. with should Corresponding to class of business on Network processing port；After the data frame of the miscellaneous service from each ONU is received, this method also includes：For any kind business, whether the TSL shared by the data frame of the business is detected with distributing to the TSL phases of the business Together；If detecting, the TSL shared by the data frame of the business is fewer than the TSL for distributing to the business, and the business is distributed in reduction TSL：If detect the ratios of the TSL shared by the data frame of the business distribute to the business TSL it is identical, increase distribute to the industry The TSL of business；This method also includes：Each ONU receives the TSID and TSL of every kind of business of OLT broadcast：For the business of any pre-transmission number pick frame, according to the TSID of business according to the TSL transmitting data frames of the business to OLT.
- A kind of 2. processing system of multi-service time slot, it is characterised in that including：OLT and multiple ONU：The OLT, for for time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL, and by the TSID and TSL is broadcast to each ONU by down channel；The OLT is time slot mark TSID corresponding to every kind of traffic assignments and slot length TSL, is specifically included：OLT is every kind of traffic assignments TSID, and is each TSID mean allocations TSL；The OLT, it is additionally operable to receive the data frame of the miscellaneous service from each ONU；Be sent in service queue corresponding to the data frame of species business is assigned to according to the TSID of every kind of business etc. with should Corresponding to class of business on Network processing port；After the data frame of the miscellaneous service from each ONU is received, the OLT, it is additionally operable to：For any kind business, whether the TSL shared by the data frame of the business is detected with distributing to the TSL phases of the business Together；If detecting, the TSL shared by the data frame of the business is fewer than the TSL for distributing to the business, and the business is distributed in reduction TSL：If detect the ratios of the TSL shared by the data frame of the business distribute to the business TSL it is identical, increase distribute to the industry The TSL of business；The ONU, the TSID and TSL of every kind of business of OLT broadcast are received for ONU, for any pre-transmission data frame Business, according to the TSID of business according to the TSL transmitting data frames of the business to OLT.
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| CN101512970A (en) * | 2005-04-15 | 2009-08-19 | 新泽西理工学院 | Dynamic bandwidth allocation and service differentiation for broadband passive optical networks |
| CN101854564A (en) * | 2009-04-02 | 2010-10-06 | 普然通讯技术(上海)有限公司 | Multi-service uplink scheduling method of optical network unit |
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| CN101512970A (en) * | 2005-04-15 | 2009-08-19 | 新泽西理工学院 | Dynamic bandwidth allocation and service differentiation for broadband passive optical networks |
| CN101854564A (en) * | 2009-04-02 | 2010-10-06 | 普然通讯技术(上海)有限公司 | Multi-service uplink scheduling method of optical network unit |
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