CN103856984B - Method and device for large-flow R-P port data association on basis of mark transmitting back - Google Patents
Method and device for large-flow R-P port data association on basis of mark transmitting back Download PDFInfo
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Abstract
The invention relates to a device for large-flow R-P port data association on the basis of mark transmitting back. The device comprises a front exchange unit, middle analysis units and a rear exchange unit; in an A10/A11 network, the front exchange unit forwards data of A10 to the middle analysis units according to a gre key field, and data of A11 is forwarded to the middle analysis units according to an external IP address; the middle analysis units further analyze input flow, and part of flow which does not belong to the analysis units is marked and transmitted back to the front exchange unit; the analysis units finally will conduct decapsulation and reduction on user data, mark an IMSI number and the gre_key on a data package mac field, and forward the IMSI number and the gre_key to the rear exchange unit. According to the device, by means of the data package marking and transmitting back function, different user data loads are balanced to different analysis units according to the gre_key, and a method and the device for large-flow R-P port data association on the basis of mark transmitting back are achieved.
Description
Technical field
The present invention relates to R-P interfaces high-speed network flow monitoring field, especially one kind utilize number in CDMA2000 networks
According to bag between crosspoint and resolution unit labelling passback characteristic, the method that signaling data is associated with user data and its
Device.
Background technology
PCF（Packet Control Function, Packet Control Function）And PDSN（Packet Data Serving
Node, packet data serving node）It is most important two nodes in CDMA2000 core networks, PCF ends communicate toward PDSN ends
Link be up-link, the link that PDSN ends communicates toward PCF ends is downlink.Both pass through R-P interfaces（It is also called A10/
A11 interfaces）Interconnection.A11 is signaling interface, is responsible for establishment of connection, safeguards and deletes.A10 is data-interface, the data of transmission
Bag is GRE（Generic Routing Encapsulation, Generic Routing Encapsulation）PPP fragment datas after encapsulation, and
Have the out of order situation of bag to exist.Data after the decapsulation of A10 data have unpacked data and compressed data, for compressed data
Also need to into decompression flow process.
It is convenient that the extensive application of 3G mobile terminals brings for life, also proposes to traditional flow detection and control technology
Challenge.R-P interface data is associated and regression analysises, in business identification, business statistics, flow-control, aggressive behavior analysis etc.
There is important meaning in field.
Publication number CN103024819A《3G (Third Generation) Moblie core network data shunt method based on user terminal IP》
Process model in, there is provided all data messages can be pressed IP address uniform divided flows to corresponding with the IP address by one kind
The method of back-end analysis equipment.Due to all 3G core network links messages all can serial exchange single through Data Frontend data processing
Modules in unit, therefore each module is likely to become the bottle diameter of performance, so not adapting to big flow network
（20Gbps-40Gbps）Disposition.
Publication number CN102497652A《A kind of CDMA R-P interface massive dataflow load-balancing methods and device》's
In processing model, it is proposed that a kind of method that data balancing is sent 10G process plates by 10G crosspoints according to IP regional ascriptions,
The method granularity of this data balancing is thicker, region flow when there were significant differences load balancing effect will necessarily have a greatly reduced quality, and
And, have user data loss when same region flow is larger than the disposal ability of 10G processing equipments.
The content of the invention
Problem to be solved by this invention is, under the main trend that in the cdma 2000 network R-P interface flows increase sharply,
A kind of big flow returned based on labelling is provided（20G-40G）The device of R-P interface data association, the device can meet big flow
The joint demand of lower signaling and data.The method returned based on labelling that the device is adopted, can be with thinner granularity by A10
Data and A11 signaling equilibriums are distributed to middle resolution unit, and the load balancing effect solved in existing technologies is not good, and deployment is inadequate
Flexible technical problem.
To solve above-mentioned technical problem, the present invention proposes a kind of big flow R-P interface data association returned based on labelling
Device, the device in the A10/A11 networks of high speed flow, using front end crosspoint by the data of A10 according to gre_key
Field is forwarded to middle resolution unit, and the data of A11 are forwarded to into middle resolution unit according to outer layer IP address.Centre parsing is single
Unit can further be parsed to the flow for entering, and the flow meeting labelling for being partly not belonging to this resolution unit returns to front end friendship
Change unit.Resolution unit eventually decapsulates reduction user data, and by international mobile subscriber identity（IMSI:
International Mobile Subscriber Identification Number）Number with gre_key be marked at packet
MAC（Medium Access Control）Field, is transmitted to rear end crosspoint.The data of this device output are original use
User data, satisfaction makes the processing requirement of further analysis to user data traffic.
A kind of device of above-mentioned big flow R-P interface data association returned based on labelling, the device is included：
1. front end crosspoint
Front end crosspoint only carries out two layers, three layer protocols, VLAN（Virtual Local Area Network）Field
And in data constant offset parsing.
Packet into front end crosspoint is divided into two classes：Primary sources bag is original A10/A11 packets, second
Class packet is to cross the packet with Mn labellings through middle parsing unit resolves（The wherein span of n minimum 1, most
The number of resolution unit in the middle of greatly）.
Front end crosspoint will put T labellings after the entrance of original A10/A11 packets in bag content, then by A10, A11
Data forwarding is to middle resolution unit.
Front end crosspoint is received after the packet with Mn labellings, parses the VLAN fields in data, can be according to parsing
As a result bag is gone to into resolution unit in the middle of corresponding.
2. middle resolution unit
The processing procedure of middle resolution unit is divided into two stages.First stage is substantially carried out the parsing of gre_key, according to
The value of gre_key is come to judge the packet processed by which middle resolution unit.Second stage carries out user
The shunting of data, decapsulation, finally carries out the reduction of user's initial data.
A10/A11 data into middle resolution unit are divided into two classes, and difference can be with the two of processing procedure stage phases
Correspondence.
The first kind is the A10/A11 packets with T labellings, i.e. a data processed through front end crosspoint.This
Class data are mainly carried out in the first stage of middle resolution unit, after the phase process is finished, can be according to the gre_ for parsing
The content of key determines that the packet is carried out the parsing of next stage by which middle resolution unit, then in packet content
On put Mn labellings.If the packet is parsed by current middle resolution unit, the packet is directly sent
To a next stage.If packet is parsed by resolution unit in the middle of others, data packet back is exchanged to front end
Unit.
Secondary sources bag is the data with Mn labellings, and the process of such packet is mainly carried out in second stage.
User data after second stage is parsed puts U labellings, and the MAC upper bands of user data have the IMSI number for identifying.Have existing
Under real network environment, when equipment is accessed at the beginning it is unidentified go out IMSI number data, other specific markers will be made on MAC
To distinguish.
3. rear end crosspoint
Rear end crosspoint is deployed in rearmost, and incoming data is the data with U labellings, and rear end crosspoint can be solved
The MAC Address field of analysis packet, according to the value Hash of MAC Address packet is forwarded.
The present invention also proposes a kind of method of the big flow R-P interface data association returned based on labelling, and the method includes：
To needing data to be processed to be marked, including to initial data VLAN fields are added, and to VLAN fields and MAC
Field modifies to reach the differentiation of not isolabeling.Original A10/A11 packets into front end crosspoint put I marks
Note.Front end crosspoint enters the packet of middle resolution unit and puts T labellings.
Front end crosspoint pretreatment improves the precision for being forwarded to resolution unit in the middle of correct.For original A10 numbers
According to bag, constant offset content in packet is parsed, according to 32 digits of constant offset content（Gre_ in i.e. most of bag
Key fields）Data are forwarded a packet to into intermediate solution analysis unit, forwarding rule can be sent to middle parsing according to certain hash algorithm
On unit.For original A11 packets, front end crosspoint is according to outer layer IP to being hashing onto middle resolution unit.
Using the method for passback, it is ensured that all packets are by correct middle parsing cell processing.Middle resolution unit is pressed
Gre_key fields are identified according to GRE protocol specification.According to the value of gre_key fields, determine that the packet is by the middle of which
Resolution unit process, and packet is put into Mn labellings.Middle resolution unit returns to the packet of front end crosspoint and puts Mn marks
Note.
Front end crosspoint is received after the packet with Mn labellings, can be according to labelling content（Parse in VLAN fields
The value of vlan_id）Directly bag is gone to into resolution unit in the middle of corresponding.
The shunting of user data, decapsulation, finally carries out the reduction of user's initial data.And by the user data after reduction
MAC fields are put U labellings and are transmitted to rear end crosspoint.
The present invention has advantages below：
The process of whole R-P data associations in CDMA2000 networks is divided into front end crosspoint process, centre by the present invention
Resolution unit process and rear end crosspoint process three phases, the function of being returned using packet marking, realize it is a kind of by
According to gre_key by the method and apparatus of different user data load balancing to different resolution units.The invention is capable of achieving big stream
The association of a plurality of R-P interface data under amount, after the completion of association process, the MAC of packet（Medium plan）Field can labelling
The international mobile subscriber identity of upper user, the data of same user will be forwarded from the port of fixed rear end crosspoint
Go out.A10 data and A11 signalings be forwarded to middle parsing cell processing by the invention with finer grain, it is to avoid middle parsing
The bottleneck problem of unit protocol analysis.When operator redeploys PCF or PDSN IP, deal with it is more flexible, can
More preferably meet practical application request.
Using the method to packet marking, each stage of packet is distinguished, and front end is handed over
Change unit and distinguish according to gre_key fields the flow of different user.Final gre_key identicals data are by same centre
Resolution unit process, granularity is less, and when network environment changes, autgmentability is strong.
Using the method for passback, it is ensured that all A11/A10 packets of same stream are all by correct same intermediate solution
Analysis unit is processed, and improves the integrity of end user data.
The flexible configuration of middle resolution unit number, solves the performance bottleneck of A10 data converts.In big flow（20G-
40G）On the R-P interfaces of convergence, it is possible to achieve the association of data.
Description of the drawings
Fig. 1 is equipment structure chart of the present invention based on the big flow R-P interface data association of labelling passback, and centre parsing is single
Unit is extendible.
Fig. 2 is method flow diagram of the present invention based on the big flow R-P interface data association of labelling passback.
Fig. 3 is the flow chart that middle resolution unit carries out data processing.
Fig. 4 is the filling content graph of the VLAN fields in labelling.
Fig. 5 is the difference of VLAN fields in different labelling corresponding data bags.
Fig. 6 is the labelling figure of IMSI number and gre_key in packet.
Specific embodiment
The present invention is elaborated below in conjunction with the accompanying drawings.
Fig. 1 is the structure drawing of device of the big flow R-P interface data association returned based on labelling described by the invention.Should
Device in CDMA2000 core network domain R-P seams, by front end crosspoint, middle resolution unit and rear end crosspoint group
Into.Label 101 is front end crosspoint, and label 102 is middle resolution unit, and label 103 is rear end crosspoint.
As shown in the direction of arrow in Fig. 1, front end crosspoint is two-way with the data flow of middle resolution unit.It is middle
Resolution unit is unidirectional with the data flow of rear end crosspoint.
P [I] represents the raw data packets after the convergence of R-P interfaces, and P [T] is represented after the process of front end crosspoint, carried
The packet of T labellings, P [Mn] represent through the middle resolution unit first stage process after, the packet with Mn labellings, n generations
The resolution unit of entry, P [U] represent through middle resolution unit second stage process after, the packet with U labellings.
In the case where the flow of 20Gbps-40Gbps is accessed, can be exchanged with front and back end using front resolution unit in four
Unit is connected.
Fig. 2 is the overview flow chart of the method for the invention.The overall procedure is comprised the following steps that：
Label 201 represents that big flow R-P interface data enters front end crosspoint, and data will be set to I labellings after entering.
Label 202 represents that front end crosspoint is made whether the judgement with Mn labellings to incoming data.For carrying
The flow of Mn labellings, front end crosspoint will jump to the execution of step shown in label 203.For without Mn marked traffics i.e. original
Beginning flow, front end crosspoint will jump to step shown in label 204 to be carried out.
Label 203 represents that front end crosspoint will go to be forwarded to resolution unit in the middle of correct according to vlan_id.
Label 204 and label 206 represent the judgement to A10 data, and front end crosspoint is by IP agreement field in packet
Packet for 47 thinks A10 packets, according to the 38th byte in packet to 41 bytes（I.e. in R-P interfaces major part flow
Gre_key fields）Value, be hashing onto centre resolution unit on, juxtaposition T labelling.The hash algorithm is front end crosspoint
Know jointly with middle resolution unit.
Label 205 and label 207 represent the judgement to A11 data, and front end resolution unit is by the port numbers of data UDP field
It is judged as A11 data for 699, for A11 data, front end crosspoint will be hashing onto middle parsing according to the IP address of outer layer
On unit, juxtaposition T labelling.
Label 208 represents that middle resolution unit receives the data that front end dividing cell is proceeded to.
Whether label 209 represents middle parsing unit judges data already provided with Mn labellings.For entering, middle parsing is single
The flow with T labellings of unit, enters and is numbered step process shown in 210.For marking with Mn into middle resolution unit
The flow of note, enters and is numbered step process shown in 212.
Label 210 represents that middle resolution unit is received after the data that front end crosspoint is proceeded to, and parses according to GRE protocol
A10 data acquisition gre_key fields, while also parsing gre_key and IMSI fields to A11 data.According to the value of gre_key
Put Mn labellings.
Label 211 is judged mark Mn, if gre_key meets set hash algorithm, the i.e. packet
Gre_key exactly oneself gre_key to be dealt with, middle resolution unit directly to the packet will will jump to label 212
Shown step carries out the parsing of next step.It is most of for the A10 flows with T labellings of middle resolution unit are entered
38th byte to the data of 41 bytes of packet are exactly gre_key fields, are to need not move through send back to again front end exchange
Unit.If through the parsing of resolution unit, finding gre_key not this resolution unit values to be dealt with, will be by more
Change the vlan_id fields of packet, packet is put into Mn labellings（1<=n<=4）, it is ensured that packet can be forwarded correctly again
To middle resolution unit, the partial data will jump to step shown in label 202.
Label 212 represents the association of A11/A10 data and user data reduction, and the user data of reduction will put U labellings.
If A10 data are correctly associated with A11 data, the IMSI number of the user can be filled in the MAC fields of packet
And gre_key, then data are forwarded a packet to into rear end crosspoint.MAC fields fill the mode of IMSI, source MAC and mesh
MAC Address it is each 48, cause address illegal in order to avoid inserting MAC, IMSI number with 52 storage, gre_key be 32,
The position that other are not used in MAC is all set to 0.The filling of MAC fields is as shown in Figure 6.
Label 213 represents that data enter rear end crosspoint.
Label 214 represents rear end crosspoint according to data of the forwarding with U labellings.Rear end crosspoint is received with U
After the data of labelling, for the data for having identified IMSI number will be diverted to equipment outlet according to IMSI number.For not knowing
Do not go out the data of IMSI number, it will equipment outlet is diverted to according to gre_key.
Fig. 3 is the different process taken after the packet that middle resolution unit is received with T labellings and with Mn labellings
Flow process, is the further subdivision to middle resolution unit flow process.Comprise the following steps that：
Label 301 represents the processing procedure of ip IP fragmentation and reassemblies.
Label 302 represents the handling process that gre_key fields are extracted.Middle resolution unit and front end crosspoint have unification
It is given, by field determination data bag by parsing cell processing in the middle of which.
Label 303 is represented and judges whether the packet belongs to the resolution unit and processed.The division methods of packet are led to
Cross the value of the gre_key fields packet and carry out computing and obtain.Specifically computational methods are：
Resolution unit number=(key1+key2) % resolution unit numbers
Wherein key1 is that gre_key is taken every time 8 bits, is sequentially divided into four parts, and this four part is added the sum for obtaining.
Wherein key2 is that gre_key is taken every time 8 bits, is sequentially divided into four parts, the result that this four parts XOR is obtained.
Label 304 represents the middle resolution unit passback non-present resolution unit data to be parsed.
Label 305 represents that middle resolution unit continues to parse the data.
Label 306 represents GRE protocol resolving, realizes associating for A10 and A11 data, completes decapsulation and operates.Into
The data of the resolving all bands have Mn labellings.
Label 307 represents the process of the out of order adjustment of PPP bursts and PPP IP fragmentation and reassemblies.
Label 308 is represented to whether data are that compressed data judges.
Label 309 indicates entry into decompression module, and to compressed data decompression operation is carried out.
Label 310 is represented puts U labellings, and the user data after reduction is forwarded to into rear end crosspoint.
Fig. 4 and Fig. 5 respectively illustrate the vlan_ of the labelling of the VLAN field contents and different phase added in packet
The difference of id fields.The method that all R-P flows produced from front end crosspoint are marked is added on packet
Change vlan_id after VLAN fields to realize, vlan_id is used for the labelling in different stages and different middle resolution units
The labelling of process.
Packet vlan_id with T labellings is set to 2.
The vlan_id values of middle resolution unit are from 101（16 system number 0x65）Start.There are the feelings of resolution unit in the middle of four
Under condition, the vlan_id of resolution unit is respectively 101 in the middle of four（16 system number 0x65）, 102（16 system number 0x66）, 103
（16 system number 0x67）, 104（16 system number 0x68）.
Fig. 6 is illustrated after the data association that middle resolution unit completes R-P interfaces, IMSI or gre_key is filled out and is being counted
According to the structure chart in bag MAC fields.
In figure, from the beginning the data form with U labellings is successively the high 4 of imsi, 40, imsi centres 44,4
Position 0, No. imsi low 4,40,32 gre_key.
Claims (8)
1. the device that a kind of big flow R-P interface data returned based on labelling is associated, it is characterised in that include：
Front end crosspoint, middle resolution unit and rear end crosspoint；In A10/A11 networks, front end crosspoint is by A10
Data be forwarded to middle resolution unit according to gre_key fields, the data of A11 are forwarded to into intermediate solution according to outer layer IP address
Analysis unit；Middle resolution unit can further be parsed to the flow for entering, and partly be not belonging to the flow of this resolution unit
Meeting labelling returns to front end crosspoint；Resolution unit eventually decapsulates reduction user data, and international mobile subscriber is known
Other code IMSI number is marked at packet mac fields with gre_key, is transmitted to rear end crosspoint.
2. the device that a kind of big flow R-P interface data returned based on labelling according to claim 1 is associated, its feature
It is that the front end crosspoint carries out two layers, three layer protocols, the parsing of constant offset in VLAN fields and data.
3. the device that a kind of big flow R-P interface data returned based on labelling according to claim 1 and 2 is associated, its
It is characterised by, the packet into front end crosspoint is divided into two classes：Primary sources bag is original A10/A11 packets, the
Two class packets are to cross the packet with Mn labellings, the wherein span of n minimum 1 through middle parsing unit resolves,
It is the number of middle resolution unit to the maximum；Front end crosspoint will put T marks after the entrance of original A10/A11 packets in bag content
Note, then by A10, A11 data forwardings are to middle resolution unit；Front end crosspoint is received after the packet with Mn labellings,
VLAN fields in parsing data, resolution unit in the middle of corresponding is gone to according to analysis result by bag.
4. the device that a kind of big flow R-P interface data returned based on labelling according to claim 1 is associated, its feature
It is that the middle parsing cell processing process is divided into two stages；First stage carries out the parsing of gre_key, according to gre_
The value of key is come to judge the packet processed by which middle resolution unit；Second stage carries out user data
Shunting, decapsulation, finally carry out the reduction of user's initial data.
5. the device that a kind of big flow R-P interface data returned based on labelling according to claim 1 or 4 is associated, its
It is characterised by, the A10/A11 data into middle resolution unit are divided into two classes, and difference can be with the two of processing procedure stage phases
Correspondence；The first kind is the A10/A11 packets with T labellings, a data processed through front end crosspoint；This kind of data
The main first stage in middle resolution unit is carried out, after the phase process is finished, can be according to the interior of the gre_key for parsing
Hold the parsing for determining that the packet is carried out next stage by which middle resolution unit, Mn marks are then put in packet content
Note；If the packet is parsed by current middle resolution unit, the packet is directly sent to into rank once
Section；If packet is parsed by resolution unit in the middle of others, by data packet back to front end crosspoint；Second
Class packet is the data with Mn labellings, and the process of such packet is carried out in second stage；Second stage has been parsed
User data into after puts U labellings, and the MAC upper bands of user data have the IMSI number for identifying.
6. the device that a kind of big flow R-P interface data returned based on labelling according to claim 5 is associated, its feature
Be have under real network environment, when equipment is accessed at the beginning it is unidentified go out IMSI number data, will make another on MAC
Outer specific markers are distinguishing.
7. the device that a kind of big flow R-P interface data returned based on labelling according to claim 1 is associated, its feature
It is that the rear end crosspoint is deployed in rearmost, incoming data is the data with U labellings, rear end crosspoint meeting
The MAC Address field of parsing packet, according to the value Hash of MAC Address packet is forwarded.
8. a kind of method that big flow R-P interface data returned based on labelling is associated, the method includes：
To needing data to be processed to be marked, including adding VLAN fields to initial data, and to VLAN fields and MAC fields
Modify to reach the differentiation of not isolabeling；Original A10/A11 packets into front end crosspoint put I labellings；Before
End crosspoint enters the packet of middle resolution unit and puts T labellings；Front end crosspoint pretreatment is improved and is forwarded to correctly
The precision of middle resolution unit；For original A10 packets, constant offset content in packet is parsed, according to fixed inclined
32 digits of content are moved, using hash algorithm as forwarding rule, data intermediate solution analysis unit is forwarded a packet to into；For original
A11 packets, method of the front end crosspoint according to outer layer IP to being hashing onto middle resolution unit, using returning, it is ensured that all
Packet is by correct middle parsing cell processing；Middle resolution unit identifies gre_key fields according to GRE protocol specification；
According to the value of gre_key fields, determine the packet is which centre to parse cell processing by, and packet is put into Mn marks
Note；Middle resolution unit returns to the packet of front end crosspoint and puts Mn labellings；Front end crosspoint is received with Mn labellings
Packet after, bag is directly gone to by resolution unit in the middle of corresponding according to labelling content；Middle resolution unit carries out number of users
According to shunting, decapsulation finally carries out the reduction of user's initial data, and the user data MAC fields after reduction are put into U labellings
It is transmitted to rear end crosspoint.
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