CN105450541B

CN105450541B - Based on service link by the method and apparatus of application data packet

Info

Publication number: CN105450541B
Application number: CN201410438589.3A
Authority: CN
Inventors: 汪治; 蔡亦钢
Original assignee: Alcatel Optical Networks Israel Ltd
Current assignee: Alcatel Optical Networks Israel Ltd
Priority date: 2014-08-29
Filing date: 2014-08-29
Publication date: 2018-10-02
Anticipated expiration: 2034-08-29
Also published as: CN105450541A

Abstract

The object of the present invention is to provide a kind of to set equipment based on service link in LTE/EPC by the method for application data packet.Specifically, TDF equipment is based on the service chaining classifying rules attribute value pair in extension Sd interfaces, receive that corresponding PCRF equipment sends about the application Detection ＆ Controling rule using data packet for being supplied to user, wherein described using Detection ＆ Controling rule is based on service chaining；For the TDF equipment according to application Detection ＆ Controling rule, routing is described to apply data packet.Compared with prior art, invention enhances the TDF equipment and corresponding A/D C rules (Sd interfaces) in existing 3GPP LTE/EPC, make it that can support service chaining, and introduces based on the flexible service chaining using detection function provided by TDF equipment/ADC.

Description

Based on service link by the method and apparatus of application data packet

Technical field

The present invention relates to fields of communication technology, more particularly to one kind in LTE/EPC for being based on service link by applying The technology of data packet.

Background technology

Service chaining (service chaining) is that the ordered set that will service is applied to data packet or the concept of stream, that is, Service chaining refers to some the corresponding processing procedures of row service for being supplied to the data of user and being passed through before reaching the user.It removes Except basic routing and forwarding capability, the service in chain may include such as load balancing, fire wall, intrusion prevention, depth Packet detection (DPI, Deep Packet Inspection), Lawful Interception (LI, Lawful Intercept) module, NAT (Network Address Translation, network address translation) 44 (RFC3022), NAT64 (RFC6146), DS-Lite AFTR(DS-Lite：Dual Stack Lite, double stacks of lightweight, AFTR：Address Family Translation Router, address family translation router, RFC6333), NPTv6 (IPv6-to-IPv6 Network Prefix The network prefix of Translation, IPv6 to IPv6 is converted, RFC6296), HOST_ID injections, HTTP improvement functions, TCP (Transmission Control Protocol, transmission control protocol) adjusts and the service of optimization function etc..For that will take Being engaged in chain can be based on across OSI (Open System Interconnection, Open System Interconnection) for data packet or the standard of stream Layer is (for example, physical port, ethernet mac (Media Access Control, medium access control) header, IP headers are believed Breath, transmission and application layer message) data packet/stream attribute.

Service chaining is the chain service-Engine provided for user data service in a mobile network as value-added service The effective means of (chaining service enabler).In 3GPP policy controls and management framework, operator spy is provided The LTE network part for determining value-added service needs constantly to enhance and extend business and mobile network to keep up with steady-state growth and provides Production monetization.Therefore, it is necessary to create the new paragon of the value-added service of innovation and mobile network's assets currency, such as in LTE/EPC The support to service chaining is introduced in (EPC, Evolved Package Core, evolution block core) policy control architecture, especially When needing on application layer (application level) to execute service chaining, such as based on application message (for example, application identities Symbol, service identifier, etc.) and/or event (for example, using _ start, using _ terminate, etc.) different service chainings are provided, And the prior art cannot achieve.

Invention content

It is an object of the present invention to provide a kind of sides being used in LTE/EPC based on service link by application data packet Method and equipment.

According to an aspect of the invention, there is provided a kind of for being based on service link in LTE/EPC by applying data The method of packet, wherein this approach includes the following steps：

A TDF equipment receives corresponding PCRF equipment hair based on the service chaining classifying rules attribute value pair in extension Sd interfaces Send about be supplied to user using data packet application Detection ＆ Controling rule, wherein it is described apply Detection ＆ Controling Rule is based on service chaining；

For TDF equipment described in b according to application Detection ＆ Controling rule, routing is described to apply data packet.

According to another aspect of the present invention, it additionally provides a kind of for being based on service link in LTE/EPC by applying number According to the TDF equipment of packet, wherein the TDF equipment includes：

First receiving device, for based on the service chaining classifying rules attribute value pair in extension Sd interfaces, receiving and corresponding to PCRF equipment send about be supplied to user using data packet application Detection ＆ Controling rule, wherein the application Detection ＆ Controling rule is based on service chaining；

Route device, for according to application Detection ＆ Controling rule, routing is described to apply data packet.

In accordance with a further aspect of the present invention, it additionally provides a kind of for assisting in LTE/EPC based on service link by answering With the PCRF equipment of data packet, wherein the PCRF equipment includes：

First generating means, for generating about the application Detection ＆ Controling rule using data packet for being supplied to user Then, wherein described using Detection ＆ Controling rule is based on service chaining；

First sending device is used for based on the service chaining classifying rules attribute value pair in extension Sd interfaces, by the application Detection ＆ Controling rule is sent to corresponding TDF equipment.

According to another aspect of the invention, it additionally provides a kind of for being based on service link in LTE/EPC by applying number According to the system of packet, wherein the system includes such as aforementioned PCRF equipment according to a further aspect of the invention, and as aforementioned according to this The TDF equipment of invention another further aspect.

Further aspect according to the present invention additionally provides a kind of for the base in the LTE/EPC for supporting software defined network In service link by the system of application data packet, wherein the system includes as aforementioned PCRF according to a further aspect of the invention is set It is standby, and such as aforementioned TDF equipment according to a further aspect of the present invention.

Compared with prior art, in one embodiment of the present of invention, TDF equipment is based on the service chaining point in extension Sd interfaces Rule-like attribute value pair, receive that corresponding PCRF equipment sends about be supplied to the application detection using data packet of user with Control rule, wherein it is described using Detection ＆ Controling rule be based on service chaining, with according to the application Detection ＆ Controling rule Then, routing is described applies data packet, to which invention enhances the TDF equipment and corresponding A/D C in existing 3GPP LTE/EPC Regular (Sd interfaces), makes it that can support service chaining, and introduces based on the spirit using detection function provided by TDF equipment/ADC Service chaining living, correspondingly, the present invention is realized to be realized based on infomation detections such as application type, application attribute and service chaining attributes The mechanism of dynamic service chain binding；Meanwhile enhanced TDF equipment/ADC can be used for based in application layer (application Level) detection on service, application, service chaining and service chaining identifier classifies to service chaining；Further, of the invention Also it is inserted into for LTE/EPC architectures and effective new demand servicing and upgrading provides dynamic, flexible, expansible service chaining；More Further, the invention enables LTE/EPC policy control architectures can support service chaining, when needs execute service chaining on application layer When, for example, based on application message (for example, application identifier, service identifier, etc.) and/or event (for example, using _ start, Using _ terminate, etc.), the present invention can provide different service chainings.

Description of the drawings

By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other Feature, objects and advantages will become more apparent upon：

Fig. 1 shows to be used in LTE/EPC based on service link by applying data according to one kind of one aspect of the invention The equipment schematic diagram of the PCRF equipment and TDF equipment of packet；

Fig. 2 shows one kind in accordance with a preferred embodiment of the present invention to be used in LTE/EPC based on service link by answering With the equipment schematic diagram of the TDF equipment of data packet；

It is a kind of in LTE/ that Fig. 3 shows that PCRF equipment according to a further aspect of the present invention and the cooperation of TDF equipment are realized Based on service link by the method flow diagram of application data packet in EPC；

Fig. 4 shows one kind in accordance with a preferred embodiment of the present invention for being based on service link in LTE/EPC by answering With the method flow diagram of data packet.

Same or analogous reference numeral represents same or analogous component in attached drawing.

Specific implementation mode

Present invention is further described in detail below in conjunction with the accompanying drawings.

Fig. 1 shows to be used in LTE/EPC based on service link by applying data according to one kind of one aspect of the invention The equipment schematic diagram of the PCRF equipment 1 and TDF equipment 2 of packet, wherein PCRF equipment 1 is sent out including the first generating means 11 and first It includes first receiving device 21 and route device 22 to send device 12, TDF equipment.Specifically, the first generating means of PCRF equipment 1 11 generate about the application Detection ＆ Controling rule using data packet for being supplied to user, wherein the application detection and control It is based on service chaining to make rule；First sending device 12 based on extension Sd interfaces in service chaining classifying rules attribute value pair, The application Detection ＆ Controling rule is sent to corresponding TDF equipment；Correspondingly, 21 base of first receiving device of TDF equipment 2 In extending the service chaining classifying rules attribute value pair in Sd interfaces, receive that corresponding PCRF equipment sends about being supplied to user The application Detection ＆ Controling rule using data packet, wherein described using Detection ＆ Controling rule is based on service chaining；Road By device 22 according to application Detection ＆ Controling rule, routing is described to apply data packet.

Here, PCRF (strategy and charging rule functions, Policy and Charging Rules Function) equipment 1 It is to refer to generate for application data packet to apply Detection ＆ Controling (ADC, Application Detection and Control) Rule and by the ADC rules be sent to TDF (flow detection function, Traffic Detection Function) equipment 2 for It is used to route the functional entity using data packet.In the concrete realization, PCRF equipment 1 can be the extension of existing PCRF.

Here, TDF (flow detection function, Traffic Detection Function) equipment 2 refers to executing application inspection It surveys, will detect that the ADC that application and its service data flow describe to report to PCRF equipment 1 and based on PCR F equipment 1 issues is advised Then it route the functional entity of the data packet of the application.Here, the corresponding one group of data packet of same application may be constructed using stream (traffic), the data packet of different application also may make up using stream.Preferably, same application stream is ultimately routed to recipient Before, it according to the handling result of ADC rules, the variation of Network status and/or previous service chaining, may undergo multiple and different Service chaining.

In the concrete realization, TDF equipment 2 can be the extension of existing TDF.

Here, those skilled in the art will be understood that above-mentioned PCRF equipment 1 and TDF equipment 2 are only for example, other are existing Or the PCRF equipment or TDF equipment being likely to occur from now on are such as applicable to the present invention, should also be included in the scope of the present invention with It is interior, and be incorporated herein by reference herein.

Specifically, the generation that the first generating means 11 of PCRF equipment 1 are sent based on its corresponding TDF equipment 2 is about waiting for It is supplied to the request using Detection ＆ Controling rule using data packet of user, to generate the application Detection ＆ Controling rule Then；Alternatively, being actively that its corresponding TDF equipment 2 generates application Detection ＆ Controling rule, wherein the application detection with It is based on service chaining to control rule.Here, the application Detection ＆ Controling rule is (to refer to 3GPP TS to existing ADC 23.212) regular extension, it includes service chainings to trigger regular (Service-Chaining-Trigger-Rule), service chaining The information such as Policy Table's content (Service-Chaining-Policy-Table-Content), therefore, the application detection and control It is based on service chaining to make rule, wherein service chaining triggering rule and service chain Policy Table content will be in service chainings below point It is illustrated in rule-like AVP.Here, when the first generating means 11 generate the application Detection ＆ Controling rule, it can basis Correspondence between the application of configuration and the corresponding rule using Detection ＆ Controling, come to be supplied to the application data of user Packet generates corresponding application Detection ＆ Controling rule；Alternatively, the service that can be also reported according to the network equipment (such as TDF equipment 2) The execution information of chain is with user related information (for example, user's differentiation, billing data plan, position, access technology, age, time Period, user preference, etc.), to be dynamically generated corresponding application detection and control to be supplied to the application data packet of user System rule.For example, it is assumed that the first generating means 11 of PCRF equipment 1 are to be given birth to using the application data packet such as application-1 At application Detection ＆ Controling rule be ADC-1, when the first generating means 11 be using such as application-2 application data When packet is generated using Detection ＆ Controling rule, it is assumed that application-1 is identical as the application type of application-2 or phase Seemingly, then the first generating means 11 can determine the answering using Detection ＆ Controling rule and application-1 of application-2 It is identical with Detection ＆ Controling rule, i.e., also it is ADC-1；For another example, example is connected, it is assumed that the first generating means 11 are using such as Application-1's applies Detection ＆ Controling rule ADC-1 in the process of implementation using what data packet generated, in the ADC-1 Service chaining such as service-chaining-1 in certain service execute failure such as " routing optimality ", then the first generating means 11 are When the application data packet of application-2 is generated using Detection ＆ Controling rule, although application-1 with The application type of application-2 is same or similar, and the first generating means 11 can adjust service chaining such as service- The service for including in chaining-1, such as removal execute " routing optimality " service of failure, by removal " routing optimality " service Application data packet corresponding application Detection ＆ Controling rule such as ADC-s of the service-chaining-1 as application-2 Service chaining in 2, i.e. ADC-2 and ADC-1 the difference is that only：Service chaining in ADC-2 is removal " routing in ADC-1 Service-chaining-1 after optimization " service.

For example, it is assumed that user A is by its user terminal access IP network such as video website etc., to watch video such as video- Data packet (applying data packet) such as user-A-video-packets, TDF of A, the video for being supplied to user A are set Standby 2 have sent the request using Detection ＆ Controling rule that data packet is applied about this to corresponding PCRF equipment 1, such as pass through Sd Interface sends TDF sessions response (TSA, TDF-Session-Answer) or control charging response (CCA, CC- to PCRF equipment 1 Answer) or the orders such as response (RAA, Re-Auth-Answer) are re-authenticated, to ask PCRF equipment 1 to issue about using number It is generated according to the application Detection ＆ Controling rule of packet such as user-A-video-packets when PCRF equipment 1 receives the request Corresponding application Detection ＆ Controling rule such as user-A-video-ADC rules, it includes service chaining triggering rules such as user- A-video-SC-Trigger rules and service chaining Policy Table content such as user-A-video-SCP-Table-Content etc. Information, wherein this is based on service chaining using Detection ＆ Controling rule user-A-video-ADC rules.

Here, those skilled in the art will be understood that the above-mentioned generation mode using Detection ＆ Controling rule is only to lift Example, other described modes using Detection ＆ Controling rule of generation that are existing or being likely to occur from now on are such as applicable to this hair It is bright, it should also be included within the scope of the present invention, and be incorporated herein by reference herein.

First sending device 12 is detected the application based on the service chaining classifying rules attribute value pair in extension Sd interfaces It is sent to corresponding TDF equipment with control rule.For example, connecting example, then the first sending device 12 can be by sending out to TDF equipment 2 It send TDF session requests (TSR, TDF-Session-Request) or control accounting request (CCR, CC-Request) or reflects again Power request (RAR, Re-Auth-Request) message, the message include based on the service chaining classifying rules in extension Sd interfaces AVP includes the application inspection corresponded to using data packet such as user-A-video-packets that is, in service chaining classifying rules AVP It surveys and controls rule user-A-video-ADC rules, to which Detection ＆ Controling rule user-A-video-ADC will be applied Rules is sent to TDF equipment 2.

Here, next as follows to the extension Sd interface specifications：

The present invention is enhanced by the Sd interfaces between existing PCRF and TDF and (is such as increased in existing Sd interfaces New service chaining classifying rules attribute value is to (Service-Chaining-Classification-Rule AVP, wherein AVP (Attribute Value Pairs)) to support the offer of service chaining, AVPs that is enhancing or newly increasing includes following：

1) ADC rules define the enhancing of AVP (ADC-Rule-Definition AVP)

To support service chaining, new service chaining classifying rules AVP to be added into ADC rules and define AVP (in 3GPP TS Defined in 23.212), for supporting service chaining.

2) service chaining classifying rules AVP (Service-Chaining-Classification-Rule AVP)

Its format is：

Service-Chaining-Classification-Rule::=<AVP Header:AVP Code>

[Service-Chaining-Policy-Table-Content]

[Service-Chaining-Trigger-Rule]

*[AVP]

Service chaining classifying rules AVP is packet type, when data packet matched application definition, the matching process of the data packet It completes, the service chaining classifying rules about the data packet will be applied to bind the data packet to relevant service chaining.

In addition, it can be seen that, service chaining classifying rules AVP includes service from the above service chaining classifying rules AVP formats Chain Policy Table content and service chaining strategy triggering rule, below to service chaining Policy Table's content AVP and service chaining strategy trigger gauge Then AVP is illustrated：

2) service chaining Policy Table content AVP (Service-Chaining-Policy-Table-Content AVP)

Service chaining Policy Table's content AVP includes service chaining Policy Table, and the rule of service chaining strategy are included in service chaining Policy Table Then.Wherein, service chaining strategy refers to the determining data for being supplied to user needs before reaching the user (as applied data packet) A series of which service undergone.

3) service chaining triggering rule AVP (Service-Chaining-Trigger-Rule AVP)

Its format is：

Service-Chaining-Trigger-Rule::=<AVP Header:AVP Code>

[TDF-Application-Identifier]

[Service-Identifier]

[Event-Trigger]

*[AVP]

It is packet type that service chaining, which triggers rule AVP, including data packet to be tied to the condition of relevant service chaining.Unless Condition defined in service chaining triggering rule meets, and otherwise service chaining Policy Table will not be used.

From the above service chaining trigger rule AVP formats in it can be seen that, service chaining triggering rule by below in relation to use take The condition composition of business chain classifying rules：

- TDF application identifiers (TDF-Application-Identifier)

Service identifier (Service-Identifier)

Event triggers (Event-Trigger)

All these sub- AVPs are the existing AVP defined in 3GPP TS 29212.The first two AVPs (i.e. TDF application marks Know symbol and service identifier) it be used to identify and will be applied to the application and service of service chaining.Event triggering AVP be used to know Not Chu Fa service chaining event.

If correlated condition is also provided in ADC rules define AVP, service chaining triggers the condition defined in rule AVP It will be prioritized in service chaining processing.If service chaining triggering rule AVP is not provided with, ADC rules, which define in AVP, to be carried The condition of confession will be used in service chaining processing.

Correspondingly, the first receiving device 21 of TDF equipment 2 is based on the service chaining classifying rules attribute value in extension Sd interfaces It is right, receive that corresponding PCRF equipment sends about the application Detection ＆ Controling rule using data packet for being supplied to user, In, described using Detection ＆ Controling rule is based on service chaining.

For route device 22 according to application Detection ＆ Controling rule, routing is described to apply data packet.Specifically, routing dress 22 are set first according to application Detection ＆ Controling rule, are the application allocation of packets service chaining identifier；Then, by institute It states and routes to flow-control module using data packet, to be routed to the application data packet and institute by the flow-control module State the corresponding service-Engine of service chaining identifier (such as service provider).Here, flow-control module will apply data Can selectively be route during packet routes to service-Engine corresponding with the service chaining identifier. This, the address of the flow-control module can be provided by TDF equipment 2 itself, alternatively, can also be carried by service chaining classifying rules AVP For.In the concrete realization, flow-control module can be located on network element, wherein network element (NE, Network Element) can be PCRF equipment 1, or can also be TDF equipment 2 itself, alternatively, can also be independent network equipment etc..

Specifically, route device 22 can be the application allocation of packets service chaining identifier in the following manner：From institute It states and triggers rule using with acquisition service chaining in control rule, then judge service chaining triggering rule whether it is satisfied；Work as institute Stating to apply does not have the service chaining in service chaining triggering rule or the rule using Detection ＆ Controling to touch in Detection ＆ Controling rule When hair rule is satisfied, according to the service chaining plan defined in service chaining Policy Table's content in the rule using Detection ＆ Controling Sketch form is found corresponding to the service chaining identifier using data packet.Here, the service chaining identifier can by number, Letter or combinations thereof is constituted.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that TDF equipment 2 First receiving device 21 to receive the application Detection ＆ Controling rule that corresponding PCRF equipment 1 is sent be user-A-video- ADC rules, it includes service chaining triggering rules as in user-A-video-SC-Trigger rules and service chaining Policy Table Hold such as user-A-video-SCP-Table-Content information, then route device 22 is first from application Detection ＆ Controling rule Service chaining triggering rule such as user-A-video-SC-Trigger are obtained in (such as user-A-video-ADC rules) Rules, and judge service chaining triggering regular (such as user-A-video-SC-Trigger rules) whether it is satisfied, when answering With not having in Detection ＆ Controling regular (such as user-A-video-ADC rules), service chaining triggers rule or application is detected and controlled When service chaining triggering rule in system regular (such as user-A-video-ADC rules) is satisfied, according to using Detection ＆ Controling Service chaining Policy Table's content (such as user-A-video-SCP-Table- in regular (such as user-A-video-ADC rules) Content the service chaining Policy Table defined in) finds corresponding to the clothes using data packet (such as user-A-video-packets) Business chain identifier is such as " SC-ID=SC_video123 ", here, the application class in service chaining Policy Table with application data packet The corresponding service chaining ID of service chaining strategy list item that type, application attribute match can be applied the service chaining mark of data packet as this Know symbol, even if alternatively, also can by service chaining Policy Table only there are one one of service chaining strategy list item with apply data Packet matches, then the service chaining ID of the service chaining strategy also can be by the service chaining identifier as application data packet；If alternatively, clothes The service chaining strategy for not having in business chain Policy Table and matching using data packet, then can be using the service chaining ID of acquiescence as using number According to the service chaining identifier of packet；Then, flow control mould will be routed to using data packet (such as user-A-video-packets) Block, to be routed to this and service chaining identifier using data packet (such as user-A-video-packets) by flow-control module " SC-ID=SC_video123 " corresponding service-Engine, to carry out service center by corresponding service-Engine application data packet Reason, for example, it is assumed that the service chaining corresponding to service chaining identifier " SC-ID=SC_video123 " includes following service：Safety inspection Survey, routing optimality, distribution 100M bandwidth resources, then will route to and take using data packet (such as user-A-video-packets) Chain identifier " SC-ID=SC_video123 " corresponding service-Engine be engaged in, it can be achieved that application data packet (such as user-A- Video-packets " safety detection, routing optimality, distribution 100M bandwidth resources " processing).

Here, service chaining identifier can be communicated in the various positions of data packet, such as in L2 layers, the new IP options of definition Or new IPv6 extension headers, alternatively, using IPv6 stream labels, reusing existing domain (for example, existing IPv4 and IPv6 packets Differentiated Services Field (DS Field, Differentiated Services Field), TCP option etc. in head.

Here, it will be appreciated by those skilled in the art that route device 22 is service chaining described in the application allocation of packets Can be each service chaining identifier identical or different using allocation of packets in same application stream when identifier, and point The service chaining identifier matched is unique.

It is only for example using the mode of data packet here, those skilled in the art will be understood that above-mentioned routing is described, other Routing that is existing or being likely to occur from now on is described to be such as applicable to the present invention using the mode of data packet, should also be included in this hair Within bright protection domain, and it is incorporated herein by reference herein.

It constantly works between PCRF equipment 1 and each device of TDF equipment 2.Specifically, PCRF equipment 1 First generating means 11 are continuously generated about the application Detection ＆ Controling rule using data packet for being supplied to user, wherein Described using Detection ＆ Controling rule is based on service chaining；First sending device 12 is persistently based on the service in extension Sd interfaces The application Detection ＆ Controling rule is sent to corresponding TDF equipment by chain classifying rules attribute value pair；Correspondingly, TDF equipment 2 first receiving device 21 persistently based on the service chaining classifying rules attribute value pair in extension Sd interfaces, receives corresponding PCRF and sets Preparation send about the application Detection ＆ Controling rule using data packet for being supplied to user, wherein application detection with It is based on service chaining to control rule；Route device 22 continues, according to application Detection ＆ Controling rule, to route the application Data packet.Here, it should be understood by those skilled in the art that it is described it is " lasting " refer to PCRF equipment 1 and TDF equipment 2 each device it Between constantly carry out respectively using Detection ＆ Controling rule generation, send and receive, and application data packet routing, up to PCRF equipment 1 stops generating the application Detection ＆ Controling rule in a long time.

Fig. 2 shows one kind in accordance with a preferred embodiment of the present invention to be used in LTE/EPC based on service link by answering With the TDF equipment 2 of data packet, wherein TDF equipment 2 includes first receiving device 21 ' and route device 22 ', wherein routing dress It includes allocation unit 221 ' and routing unit 222 ' to set 22 '.Specifically, the first receiving device 21 ' of TDF equipment 2 is based on extension Service chaining classifying rules attribute value pair in Sd interfaces, receive that corresponding PCRF equipment sends about the application for being supplied to user The application Detection ＆ Controling rule of data packet, wherein described using Detection ＆ Controling rule is based on service chaining；Allocation unit 221 ' according to application Detection ＆ Controling rule, is the application allocation of packets first service chain identifier；Routing unit The application data packet is routed to flow-control module by 222 ', to apply data packet by described by the flow-control module By extremely service-Engine corresponding with the first service chain identifier.Here, in first receiving device 21 ' and Fig. 1 embodiments Corresponding intrument content it is identical or essentially identical, for simplicity, therefore details are not described herein, and by reference include with This.

Specifically, allocation unit 221 ' is the application allocation of packets the according to application Detection ＆ Controling rule One service chaining identifier.Here, route device in the mode and Fig. 1 of the distribution of allocation unit 221 ' the first service chain identifier The mode of the 22 distribution service chaining identifiers is identical or essentially identical, and for simplicity, therefore details are not described herein, and with reference Mode include and this.Wherein, the first service chain identifier that allocation unit 221 ' is distributed divides with route device in Fig. 1 22 Meaning with the service chaining identifier can be it is identical, correspondingly, the first service chain identifier and the service chaining mark It can be identical to know symbol.

Here, it will be appreciated by those skilled in the art that allocation unit 221 ' is first described in the application allocation of packets Can be each first service chain mark identical or different using allocation of packets in same application stream when service chaining identifier Know symbol, and the first service chain identifier distributed is unique.

Here, TDF equipment 2 passes through as using allocation of packets first service chain identifier, realizing will be using data packet It is tied to service chaining, meanwhile, also achieving service chaining classification, (its meaning is that will be tied to corresponding related clothes using data packet It is engaged in chain) function, and service chaining classification feature indicates user-plane function, it can be based on service chaining classifying rules AVP by classification Data packet is tied to relevant service chaining.Preferably, TDF equipment 2 can be according to the instruction of PCRF equipment 1 or the local of TDF equipment 2 Information executes the bindings of the data packet and relevant service chaining of classification.

Then, the application data packet is routed to flow-control module by routing unit 222 ', with by the flow control The application data packet is routed to service-Engine corresponding with the first service chain identifier by module.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that TDF equipment 2 First receiving device 21 ' to receive the application Detection ＆ Controling rule that corresponding PCRF equipment 1 is sent be user-A-video- ADC rules, it includes service chaining triggering rules as in user-A-video-SC-Trigger rules and service chaining Policy Table Hold such as user-A-video-SCP-Table-Content information, and that allocation unit 221 ' is that this applies allocation of packets One service chaining identifier is the service chaining ID of acquiescence, such as " SC-ID=SC_default_video000 ", then routing unit 222 ' Flow-control module will be routed to using data packet (such as user-A-video-packets), to be answered this by flow-control module It is routed to and service chaining identifier " SC-ID=SC_default_ with data packet (such as user-A-video-packets) The corresponding service-Engines of video000 ", to carry out service processing by corresponding service-Engine application data packet.

In a preferred embodiment (with reference to figure 2), TDF equipment 2 further includes detection device (not shown) and acquisition device (not shown).Specifically, detection device detects whether the application data packet has been applied second service chain identifier；It obtains If the device application data packet has been applied the second service chain identifier, the second service chain identifier is obtained； Wherein, whether the first service chain identifier of routing unit 222 ' matches with the second service chain identifier, with Determine the application service chain identifier using corresponding to data packet；The application data packet is routed into corresponding flow control Molding block, it is corresponding with the application service chain identifier to be routed to the application data packet by the flow-control module Service-Engine.

Specifically, detection device can by check detect using the header of data packet the application data packet whether by Apply second service chain identifier.Here, the second service chain identifier can be TDF equipment 2 in based on PCR F equipment 1 Issue application Detection ＆ Controling rule be using first service chain identifier described in allocation of packets before, using data packet elder generation Preceding assigned service chaining identifier can be identical with the first service chain identifier, can also be different.It is excellent Selection of land, second service chain identifier can be distributed by TDF equipment 2, can also be distributed by other network equipments.

If the application data packet has been applied the second service chain identifier, acquisition device obtains second clothes Business chain identifier.

For example, the application data packet such as user-A-video-packets for being supplied to user A, if detection device is examined It surveys this and finds that this has had also been employed that second service chain identifier using data packet using the packet header of data packet, then acquisition device can The second service chain identifier having also been employed that is obtained from the packet header using data packet, is such as " SC-ID=SC_ default_video000”。

Then, the first service chain identifier more described first of routing unit 222 ' is with the second service chain identifier It is no to match, with the determination application service chain identifier using corresponding to data packet；Then, data packet is applied by described By to corresponding flow-control module, being taken with the application with being routed to the application data packet by the flow-control module The business corresponding service-Engine of chain identifier.

For example, connecting example, it is assumed that allocation unit 221 ' is to be supplied to the application data packet such as user-A- of user A The first service chain identifier of video-packets distribution is the service chaining ID of acquiescence, such as " SC-ID=SC_default_ Video000 ", then routing unit 222 ' detection find acquisition device get this apply data packet (such as user-A-video- Packets the second service chain identifier) having also been employed that is " SC-ID=SC_default_video000 ", single with distribution Member 221 ' applies the first service chain identifier " SC-ID=SC_ of data packet (such as user-A-video-packets) distribution for this Default_video000 " is matched namely the two is identical, then routing unit 222 ' can determine this using answering corresponding to data packet It is " SC-ID=SC_default_video000 " with service chaining identifier.

Preferably, if the application data packet is not applied the second service chain identifier, wherein routing unit 222 ' first using the first service chain identifier as the application service chain identifier using corresponding to data packet；So Afterwards, the application data packet is routed into corresponding flow-control module, with by the flow-control module by the application number Service-Engine corresponding with the application service chain identifier is routed to according to packet.

Preferably, TDF equipment 2 further includes send-request unit (not shown), and PCRF equipment further includes request reception device (not shown) and the second generating means (not shown).Specifically, if first service chain mark and the second service chain mark Know mismatch, the send-request unit of TDF equipment 2 to the PCRF equipment send about the new opplication detection using data with Control the request of rule；Correspondingly, the request reception device of PCRF equipment 1 receives being answered about described for the TDF equipment transmission With the request of the new opplication Detection ＆ Controling rule of data；Second generating means are generated according to the request about the application The new opplication Detection ＆ Controling rule of data packet, the TDF equipment is sent to by the new opplication rule and control rule.

Specifically, if first service chain mark identifies mismatch, the request hair of TDF equipment 2 with the second service chain Device is sent to send the request about the new opplication Detection ＆ Controling rule using data packet to the PCRF equipment.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that allocation unit 221 ' be to be supplied to the first service chain identifier using data packet such as user-A-video-packets distribution of user A to be The service chaining ID of acquiescence, such as " SC-ID=SC_default_video000 ", the then detection of routing unit 222 ' have found acquisition device The second service chain identifier having also been employed that using data packet (such as user-A-video-packets) got is " SC-ID=SC_default_video111 " is that this applies data packet (such as user-A-video- with allocation unit 221 ' Packets first service chain identifier " SC-ID=SC_default_video000 " mismatch namely the two not phase) distributed Together, then the send-request unit of TDF equipment 2 to the PCRF equipment send new opplication detection about described using data packet with Control the request of rule.

Correspondingly, what the request reception device of PCRF equipment 1 received that the TDF equipment sends applies data packet about described New opplication Detection ＆ Controling rule request.

Second generating means are generated and are advised about the new opplication Detection ＆ Controling using data packet according to the request Then, the new opplication rule and control rule are sent to the TDF equipment.Here, the generation of the second generating means is described new Being generated with the first generating means 11 in Fig. 1 using the mode of Detection ＆ Controling rule applies the mode of Detection ＆ Controling rule identical Or it is essentially identical, for simplicity, therefore details are not described herein, and include by reference and this.

Preferably, in other cases, TDF equipment 2 can also send service chaining to PCRF equipment 1 and report and please look for novelty ADC rules, for example, event triggering (Event Trigger) defined in 3GPPTS23.203, i.e., PCRF equipment 1 defines first Needing event that other network elements are reported to it will report when TDF equipment 2 detects corresponding event to PCRF equipment 1 It accuses, and according to configuration decides whether to wait for and route again using data packet after new ADC rules, that is, TDF equipment 2 both can be New ADC rules are received from PCRF equipment 1 to route using data packet again later, alternatively, can also receive new ADC rules Routing before is using data packet (at this point, TDF equipment 2 route data packet according to the service chaining ID applied using data packet).

Here, new event triggering (Event Trigger) relevant to service chaining is exemplified below shown in table 1：

Table 1

Preferably, if first service chain mark identifies mismatch, the request hair of TDF equipment 2 with the second service chain Device is sent to send the same of the request about the new opplication Detection ＆ Controling rule using data packet to the PCRF equipment When, TDF equipment 2 can also be executed following based on the service that TDF equipment 2 itself provides or based on the instruction from PCRF equipment 1 At least any one in operation：1) it violates existing from the instruction of PCRF equipment 1, change service chaining classification in TDF equipment 2；2) It maintains constant using the second service chain identifier detected in data packet；3) refuse unmatched using data packet；4) Delete using the service chain information in data packet, that is, this using not starting service chaining in data packet.Here, this field skill Art personnel will be understood that above-mentioned TDF equipment was executed when first service chain mark identifies mismatch with the second service chain Operation is only for example, other existing or suitable TDF equipment for being likely to occur from now on first service chain mark with it is described Second service chain identifies the operation executed when mismatch and is such as applicable to the present invention, should also be included within the scope of the present invention, And it is incorporated herein by reference herein.

In a preferred embodiment (with reference to figure 2), wherein TDF equipment 2 further includes the second sending device (not shown), PCRF equipment 1 further includes the second reception device (not shown).Specifically, the second sending device of TDF equipment 2 is connect based on extension Sd Service chaining Report Properties value pair in mouthful, to the service chaining correlation letter applied described in the PCRF equipment reports corresponding to data packet Breath；Correspondingly, the second reception device of PCRF equipment 1 receives the described using corresponding to data packet of the TDF equipment reports Service chaining relevant information.

Specifically, the second sending device of TDF equipment 2 based on extension Sd interfaces in service chaining Report Properties value pair, to Using the service chaining relevant information corresponding to data packet described in the PCRF equipment reports.Here, the service chaining relevant information Including but not limited to following at least any one：1) the service chaining identifier be assigned/applied using data packet, it is such as described The first service chain identifier or application service chain identifier or second service chain identifier etc. being assigned using data packet；2) institute The relevant information for stating the service chaining corresponding to the service chaining identifier be assigned/applied using data packet, such as opening for service chaining Begin, the end etc. of service chaining.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that allocation unit 221 ' be to be supplied to the first service chain identifier using data packet such as user-A-video-packets distribution of user A to be The service chaining ID of acquiescence, such as " SC-ID=SC_default_video000 ", then the second sending device can be based on extension Sd interfaces In service chaining Report Properties value to (Service-Chaining-Report AVP), report that this applies data to PCRF equipment 1 It is coated with the service chaining identifier " SC-ID=SC_default_video000 " of distribution.

Here, illustrating such as to the service chaining report AVP (Service-Chaining-Report AVP) in extension Sd interfaces Under：

Service chaining reports that AVP is also packet type, and it includes reported to PCRF equipment 1 about corresponding to application data packet Service chaining relevant information.

Service chaining report information is made of following at least any one：

Service chaining ID:The unique identifier of service chaining.There are two types of the service chaining ID of type to be reported：1) it is detected To service connect ID, that is, by TDF equipment 2 from application data packet the service chaining ID that retrieves, i.e. second service chain identifier. 2) the service chaining ID generated, that is, the clothes generated using Detection ＆ Controling rule issued by 2 based on PCR F equipment 1 of TDF equipment Be engaged in chain ID, such as first service chain identifier；

Service chaining _ beginning：The beginning of service chaining；

Service chaining _ end：The end of service chaining；

Application/service ID：TDF application identifiers/the service identifier for the application/service that service chaining is applied；

Service chaining other parameters (for example, if TDF equipment 2 is local to determine service chaining identifier, service chaining other Parameter can be service chaining table of contents).

Here, those skilled in the art will be understood that the information that above-mentioned TDF equipment 2 is reported to PCRF equipment 1 is only for example, The information that other suitable TDF equipment 2 that are existing or being likely to occur from now on are reported to PCRF equipment 1 is such as applicable to the present invention, It should also be included within the scope of the present invention, and be incorporated herein by reference herein.

Correspondingly, the second reception device of PCRF equipment 1 receives the pass of the TDF equipment reports by extending Sd interfaces In the service chaining relevant information using data packet.

It is a kind of in LTE/ that Fig. 3 shows that PCRF equipment according to a further aspect of the present invention and the cooperation of TDF equipment are realized Based on service link by the method flow diagram of application data packet in EPC.

Wherein, the method comprising the steps of S1, step S2 and step S3.Specifically, in step sl, PCRF equipment 1 generates About the application Detection ＆ Controling rule using data packet for being supplied to user, wherein the application Detection ＆ Controling rule It is based on service chaining；In step s 2, PCRF equipment 1 based on extension Sd interfaces in service chaining classifying rules attribute value pair, The application Detection ＆ Controling rule is sent to corresponding TDF equipment；Correspondingly, in step s 2, TDF equipment 2 is based on expanding Open up the service chaining classifying rules attribute value pair in Sd interfaces, receive that corresponding PCRF equipment sends about being supplied to answering for user With the application Detection ＆ Controling rule of data packet, wherein described using Detection ＆ Controling rule is based on service chaining；In step In S3, for TDF equipment 2 according to application Detection ＆ Controling rule, routing is described to apply data packet.

Specifically, in step sl, the generation that PCRF equipment 1 is sent based on its corresponding TDF equipment 2 is about being supplied to The request using Detection ＆ Controling rule using data packet of user, to generate the application Detection ＆ Controling rule；Alternatively, It is actively that its corresponding TDF equipment 2 generates the application Detection ＆ Controling rule, wherein the application Detection ＆ Controling rule It is based on service chaining.Here, the application Detection ＆ Controling rule is to existing ADC (referring to 3GPP TS 23.212) rule Extension then, it includes service chainings to trigger regular (Service-Chaining-Trigger-Rule), service chaining Policy Table's content (Service-Chaining-Policy-Table-Content) etc. information, therefore, the application Detection ＆ Controling rule is base In service chaining, wherein service chaining triggering rule and service chain Policy Table content will be in service chaining classifying rules AVP below It is illustrated.Here, in step sl, it, can be according to configuration when PCRF equipment 1 generates the application Detection ＆ Controling rule Using the correspondence between the corresponding rule using Detection ＆ Controling, to be generated for the application data packet that is supplied to user Corresponding application Detection ＆ Controling rule；Alternatively, can also holding according to the service chaining that the network equipment (such as TDF equipment 2) reports Row information and user related information (for example, user's differentiation, billing data plan, position, access technology, the age, the time cycle, User preference, etc.), to be dynamically generated corresponding application Detection ＆ Controling rule to be supplied to the application data packet of user Then.For example, it is assumed that in step sl, PCRF equipment 1 is using examining using the application that data packet generates such as application-1 It is ADC-1 to survey with control rule, when PCRF equipment 1 is to generate application detection using the application data packet such as application-2 When with control rule, it is assumed that the application type of application-1 and application-2 is same or similar, then PCRF equipment 1 It can determine the application Detection ＆ Controling rule phase using Detection ＆ Controling rule and application-1 of application-2 Together, i.e., also it is ADC-1；For another example, example is connected, it is assumed that in step sl, PCRF equipment 1 is using answering such as application-1 Detection ＆ Controling rule ADC-1 is applied with what data packet generated in the process of implementation, the service chaining such as service- in the ADC-1 Certain service such as " routing optimality " in chaining-1 executes failure, then PCRF equipment 1 is the application data of application-2 When packet is generated using Detection ＆ Controling rule, although application-1 is identical as the application type of application-2 or phase Seemingly, PCRF equipment 1 can adjust the service for including in service chaining such as service-chaining-1, and such as removal executes the " road of failure By optimizing " service, apply number using the service-chaining-1 of removal " routing optimality " service as application-2 It is generated using the service chaining in Detection ＆ Controling rule such as ADC-2 according to packet, i.e. ADC-2 and ADC-1's the difference is that only： Service chaining in ADC-2 is the service-chaining-1 of removal " routing optimality " service in ADC-1.

In step s 2, PCRF equipment 1 is answered based on the service chaining classifying rules attribute value pair in extension Sd interfaces by described in It is sent to corresponding TDF equipment with Detection ＆ Controling rule.For example, connecting example, then in step s 2, PCRF equipment 1 can pass through TDF session requests (TSR, TDF-Session-Request) or control accounting request (CCR, CC- are sent to TDF equipment 2 Request) or request (RAR, Re-Auth-Request) message is re-authenticated, which includes based in extension Sd interfaces Service chaining classifying rules AVP, i.e., in service chaining classifying rules AVP comprising correspond to apply data packet such as user-A- Video-packets's applies Detection ＆ Controling rule user-A-video-ADC rules, to apply Detection ＆ Controling Regular user-A-video-ADC rules are sent to TDF equipment 2.

Here, next as follows to the extension Sd interface specifications：

1) ADC rules define the enhancing of AVP (ADC-Rule-Definition AVP)

Its format is：

Service-Chaining-Classification-Rule::=<AVP Header:AVP Code>

[Service-Chaining-Policy-Table-Content]

[Service-Chaining-Trigger-Rule]

*[AVP]

3) service chaining triggering rule AVP (Service-Chaining-Trigger-Rule AVP)

Its format is：

Service-Chaining-Trigger-Rule::=<AVP Header:AVP Code>

[TDF-Application-Identifier]

[Service-Identifier]

[Event-Trigger]

*[AVP]

- TDF application identifiers (TDF-Application-Identifier)

Service identifier (Service-Identifier)

Event triggers (Event-Trigger)

Correspondingly, in step s 2, TDF equipment 2 is connect based on the service chaining classifying rules attribute value pair in extension Sd interfaces Receive that corresponding PCRF equipment sends about the application Detection ＆ Controling rule using data packet for being supplied to user, wherein institute It is based on service chaining to state using Detection ＆ Controling rule.

In step s3, for TDF equipment 2 according to application Detection ＆ Controling rule, routing is described to apply data packet.Specifically Ground, in step s3, TDF equipment 2 are first the application allocation of packets service according to application Detection ＆ Controling rule Chain identifier；Then, the application data packet is routed into flow-control module, to be answered by described in by the flow-control module Service-Engine (such as service provider) corresponding with the service chaining identifier is routed to data packet.Here, flow control Molding block can have during data packet will be applied to route to service-Engine corresponding with the service chaining identifier Selectively it is route.Here, the address of the flow-control module can be provided by TDF equipment 2 itself, alternatively, also can be by taking Business chain classifying rules AVP is provided.In the concrete realization, flow-control module can be located on network element, wherein network element (NE, Network Element) can be PCRF equipment 1, or can also be TDF equipment 2 itself, alternatively, can also be independent Network equipment etc..

Specifically, in step s3, TDF equipment 2 can be the application allocation of packets service chaining mark in the following manner Know symbol：From it is described application and control rule in obtain service chaining triggering rule, then judge the service chaining triggering rule whether by Meet；It is triggered in rule or the rule using Detection ＆ Controling when there is no service chaining in the rule using Detection ＆ Controling When service chaining triggering rule is satisfied, defined in service chaining Policy Table's content in the rule using Detection ＆ Controling Service chaining Policy Table finds corresponding to the service chaining identifier using data packet.Here, the service chaining identifier can be with It is made of number, letter or combinations thereof.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that in step S2 In, it is user-A-video-ADC that TDF equipment 2, which receives the application Detection ＆ Controling rule that corresponding PCRF equipment 1 is sent, Rules, it includes service chaining triggering rule such as user-A-video-SC-Trigger rules and service chaining Policy Table contents such as The information such as user-A-video-SCP-Table-Content, then in step s3, TDF equipment 2 is first from application detection and control Service chaining triggering rule such as user-A-video-SC-Trigger are obtained in system regular (such as user-A-video-ADC rules) Rules, and judge service chaining triggering regular (such as user-A-video-SC-Trigger rules) whether it is satisfied, when answering With not having in Detection ＆ Controling regular (such as user-A-video-ADC rules), service chaining triggers rule or application is detected and controlled When service chaining triggering rule in system regular (such as user-A-video-ADC rules) is satisfied, according to using Detection ＆ Controling Service chaining Policy Table's content (such as user-A-video-SCP-Table- in regular (such as user-A-video-ADC rules) Content the service chaining Policy Table defined in) finds corresponding to the clothes using data packet (such as user-A-video-packets) Business chain identifier is such as " SC-ID=SC_video123 ", here, the application class in service chaining Policy Table with application data packet The corresponding service chaining ID of service chaining strategy list item that type, application attribute match can be applied the service chaining mark of data packet as this Know symbol, even if alternatively, also can by service chaining Policy Table only there are one one of service chaining strategy list item with apply data Packet matches, then the service chaining ID of the service chaining strategy also can be by the service chaining identifier as application data packet；If alternatively, clothes The service chaining strategy for not having in business chain Policy Table and matching using data packet, then can be using the service chaining ID of acquiescence as using number According to the service chaining identifier of packet；Then, flow control mould will be routed to using data packet (such as user-A-video-packets) Block, to be routed to this and service chaining identifier using data packet (such as user-A-video-packets) by flow-control module " SC-ID=SC_video123 " corresponding service-Engine, to carry out service center by corresponding service-Engine application data packet Reason, for example, it is assumed that the service chaining corresponding to service chaining identifier " SC-ID=SC_video123 " includes following service：Safety inspection Survey, routing optimality, distribution 100M bandwidth resources, then will route to and take using data packet (such as user-A-video-packets) Chain identifier " SC-ID=SC_video123 " corresponding service-Engine be engaged in, it can be achieved that application data packet (such as user-A- Video-packets " safety detection, routing optimality, distribution 100M bandwidth resources " processing).

Here, it will be appreciated by those skilled in the art that in step s3, TDF equipment 2 is application allocation of packets institute Can be each service chaining mark identical or different using allocation of packets in same application stream when stating service chaining identifier Symbol, and the service chaining identifier distributed is unique.

It constantly works between PCRF equipment 1 and each step of TDF equipment 2.Specifically, in step sl, PCRF equipment 1 is continuously generated about the application Detection ＆ Controling rule using data packet for being supplied to user, wherein described to answer It is based on service chaining with Detection ＆ Controling rule；In step s 2, PCRF equipment 1 is persistently based on the service in extension Sd interfaces The application Detection ＆ Controling rule is sent to corresponding TDF equipment by chain classifying rules attribute value pair；Correspondingly, TDF equipment 2 persistently based on the service chaining classifying rules attribute value pair in extension Sd interfaces, receive that corresponding PCRF equipment sends about waiting carrying Supply the application Detection ＆ Controling rule using data packet of user, wherein the application Detection ＆ Controling rule is based on clothes Business chain；In step s3, TDF equipment 2 continues according to application Detection ＆ Controling rule, and routing is described to apply data packet. Here, it should be understood by those skilled in the art that it is described it is " lasting " refer between PCRF equipment 1 and each step of TDF equipment 2 respectively It constantly carries out the generation using Detection ＆ Controling rule, send and receive, and using the routing of data packet, until PCRF is set Standby 1 stops generating the application Detection ＆ Controling rule in a long time.

Wherein, the method comprising the steps of S2 ' and step S3 ', wherein step S3 ' includes step S31 ' and step S32 '.Tool Body, in step S2 ', TDF equipment 2 is received and is corresponded to based on the service chaining classifying rules attribute value pair in extension Sd interfaces PCRF equipment send about be supplied to user using data packet application Detection ＆ Controling rule, wherein the application Detection ＆ Controling rule is based on service chaining；In step S31 ', TDF equipment 2 is regular according to the application Detection ＆ Controling, For the application allocation of packets first service chain identifier；In step S32 ', TDF equipment 2 applies data packet by described By to flow-control module, the application data packet to be routed to and the first service chain mark by the flow-control module Know and accords with corresponding service-Engine.Here, step S2 ' and the content of the corresponding step in Fig. 3 embodiments are identical or essentially identical, For simplicity, therefore details are not described herein, and include by reference and this.

Specifically, in step S31 ', TDF equipment 2 applies data according to application Detection ＆ Controling rule, to be described Packet distribution first service chain identifier.Here, in step S31 ', TDF equipment 2 distributes the side of the first service chain identifier The mode that formula distributes the service chaining identifier with its in Fig. 3 in step s3 is identical or essentially identical, for simplicity, therefore This is repeated no more, and include by reference and this.Wherein, in step S31 ', first clothes of the distribution of TDF equipment 2 Business chain identifier distributed in step s3 with its in Fig. 3 the service chaining identifier meaning can be it is identical, it is correspondingly, described First service chain identifier can be identical with the service chaining identifier.

Here, it will be appreciated by those skilled in the art that in step S31 ', TDF equipment 2 is described using allocation of packets When the first service chain identifier, can be same application stream in it is each using allocation of packets it is identical or different first Service chaining identifier, and the first service chain identifier distributed is unique.

Then, in step S32 ', the application data packet is routed to flow-control module by TDF equipment 2, with by described The application data packet is routed to service-Engine corresponding with the first service chain identifier by flow-control module.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that TDF equipment 2 First receiving device 21 ' to receive the application Detection ＆ Controling rule that corresponding PCRF equipment 1 is sent be user-A-video- ADC rules, it includes service chaining triggering rules as in user-A-video-SC-Trigger rules and service chaining Policy Table Hold such as user-A-video-SCP-Table-Content information, and in step S31 ', TDF equipment 2 is that this applies data The first service chain identifier of packet distribution is that the service chaining ID of acquiescence such as " SC-ID=SC_default_video000 " then exists In step S32 ', TDF equipment 2 will route to flow-control module using data packet (such as user-A-video-packets), with This is routed to and service chaining identifier " SC- using data packet (such as user-A-video-packets) by flow-control module The corresponding service-Engines of ID=SC_default_video000 ", to be taken by corresponding service-Engine application data packet Business is handled.

In a preferred embodiment (with reference to figure 4), wherein this method further includes step S4 ' (not shown) and step S5 ' (not shown).Specifically, in step S4 ', TDF equipment 2 detects whether the application data packet has been applied second service Chain identifier；In step S5 ', if the 2 application data packet of TDF equipment has been applied the second service chain identifier, Obtain the second service chain identifier；Wherein, in step S32 ', the 2 first service chain identifier of TDF equipment with Whether the second service chain identifier matches, with the determination application service chain identifier using corresponding to data packet； The application data packet is routed into corresponding flow-control module, to apply data packet by described by the flow-control module Route to service-Engine corresponding with the application service chain identifier.

Specifically, in step S4 ', TDF equipment 2 can detect the application number using the header of data packet by checking It whether is applied second service chain identifier according to packet.Here, the second service chain identifier can be that TDF equipment 2 exists Based on PCR F equipment 1 issue application Detection ＆ Controling rule be using first service chain identifier described in allocation of packets it Before, the service chaining identifier being previously assigned using data packet, can be with the first service chain identifier it is identical, It can be different.Preferably, second service chain identifier can be distributed by TDF equipment 2, also can be by other network equipments point Match.

If the application data packet has been applied the second service chain identifier, in step S5 ', TDF equipment 2 obtains Take the second service chain identifier.

For example, the application data packet such as user-A-video-packets for being supplied to user A, if in step S4 ' In, TDF equipment 2 detects this and the packet header of data packet is applied to find that this has had also been employed that second service chain identifies using data packet Symbol, then in step S5 ', TDF equipment 2 can obtain the second service chain mark having also been employed that from the packet header using data packet Know symbol, is such as " SC-ID=SC_default_video000 ".

Then, in step S32 ', the first service chain identifier more described first of TDF equipment 2 and the second service Whether chain identifier matches, with the determination application service chain identifier using corresponding to data packet；Then, it is answered by described in Route to corresponding flow-control module with data packet, with by the flow-control module by the application data packet route to The corresponding service-Engine of application service chain identifier.

For example, connecting example, it is assumed that in step S31 ', TDF equipment 2 is to be supplied to the application data packet of user A such as The first service chain identifier of user-A-video-packets distribution is the service chaining ID of acquiescence, such as " SC-ID=SC_ Default_video000 ", then in step S32 ', TDF equipment 2 detection find its got in step S5 ' this answer It is " SC-ID=SC_ with the second service chain identifier that data packet (such as user-A-video-packets) has also been employed that Default_video000 ", in step S31 ', TDF equipment 2 is that this applies data packet (such as user-A-video- Packets first service chain identifier " SC-ID=SC_default_video000 " matching) distributed namely the two are identical, Then in step S32 ', it is " SC-ID=that TDF equipment 2, which can determine that this applies the application service chain identifier corresponding to data packet, SC_default_video000”。

Preferably, if the application data packet is not applied the second service chain identifier, wherein in step S32 ' In, TDF equipment 2 is identified the first service chain identifier as the application service chain using corresponding to data packet first Symbol；Then, the application data packet is routed into corresponding flow-control module, to be answered by described in by the flow-control module Service-Engine corresponding with the application service chain identifier is routed to data packet.

Preferably, this method further includes step S6 ' (not shown) and step S7 ' (not shown).Specifically, if described first Service chaining identify with the second service chain identify mismatch, in step S6 ', TDF equipment 2 to the PCRF equipment send about The request of the new opplication Detection ＆ Controling rule using data；Correspondingly, PCRF equipment 1 receives the TDF equipment and sends The request about the new opplication Detection ＆ Controling rule using data；In step S7 ', PCRF equipment 1 is according to described Request generates about the new opplication Detection ＆ Controling rule using data packet, the new opplication rule and control is advised Then it is sent to the TDF equipment.

Specifically, if first service chain mark identifies mismatch with the second service chain, in step S6 ', TDF is set Standby 2 send the request about the new opplication Detection ＆ Controling rule using data packet to the PCRF equipment.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that in step In S31 ', TDF equipment 2 is to be supplied to the first clothes using data packet such as user-A-video-packets distribution of user A Business chain identifier is the service chaining ID of acquiescence, such as " SC-ID=SC_default_video000 ", then in step S32 ', TDF Equipment 2 detection find its got in step S5 ' this using data packet (such as user-A-video-packets) by The second service chain identifier of application is " SC-ID=SC_default_video111 ", and in step S31 ', TDF equipment 2 apply the first service chain identifier " SC-ID=SC_ of data packet (such as user-A-video-packets) distribution for this Default_video000 " mismatches namely the two differ, then TDF equipment 2 is sent in step S6 ' to the PCRF equipment Request about the new opplication Detection ＆ Controling rule using data packet.

Correspondingly, PCRF equipment 1 receive that the TDF equipment sends about the new opplication detection using data packet with Control the request of rule.

In step S7 ', PCRF equipment 1 is generated and is detected about the new opplication using data packet according to the request With control rule, the new opplication rule and control rule are sent to the TDF equipment.Here, in step S7 ', PCRF equipment 1 generate the new opplication Detection ＆ Controling rule mode and Fig. 3 in its generate in the step S1 ' application detection with Control rule mode it is identical or essentially identical, for simplicity, therefore details are not described herein, and by reference include with This.

Here, new event triggering (Event Trigger) relevant to service chaining is exemplified below shown in table 2：

Table 2

Preferably, if first service chain mark identifies mismatch with the second service chain, in step S6 ', TDF is set Standby 2 while sending about described the request using the new opplication Detection ＆ Controling rule of data packet to the PCRF equipment, TDF equipment 2 can also execute following behaviour based on the service that TDF equipment 2 itself provides or based on the instruction from PCRF equipment 1 At least any one in work：1) it violates existing from the instruction of PCRF equipment 1, change service chaining classification in TDF equipment 2；2) it ties up It is constant to hold the second service chain identifier detected in application data packet；3) refuse unmatched using data packet；4) it deletes Except the service chain information in application data packet, that is, not starting service chaining using in data packet at this.Here, art technology Personnel will be understood that the behaviour that above-mentioned TDF equipment is executed when first service chain mark identifies mismatch with the second service chain It is only for example, other existing or suitable TDF equipment for being likely to occur from now on are in first service chain mark and described the Two service chainings identify the operation executed when mismatch and are such as applicable to the present invention, should also be included within the scope of the present invention, and It is incorporated herein by reference herein.

In a preferred embodiment (with reference to figure 4), wherein this method further includes step S8 ' (not shown).Specifically, In step S8 ', TDF equipment 2 is based on the service chaining Report Properties value pair in extension Sd interfaces, to the PCRF equipment reports institute It states using the service chaining relevant information corresponding to data packet；Correspondingly, the institute of the reception TDF equipment reports of PCRF equipment 1 It states using the service chaining relevant information corresponding to data packet.

Specifically, in step S8 ', TDF equipment 2 is based on the service chaining Report Properties value pair in extension Sd interfaces, to institute It states described in PCRF equipment reports using the service chaining relevant information corresponding to data packet.Here, the service chaining relevant information packet It includes but is not limited to following at least any one：1) the service chaining identifier be assigned/applied using data packet, it is such as described to answer The first service chain identifier or application service chain identifier or second service chain identifier etc. being assigned with data packet；2) described The relevant information for the service chaining corresponding to service chaining identifier be assigned/applied using data packet, as service chaining beginning, The end etc. of service chaining.

For example, the application data packet such as user-A-video-packets for being supplied to user A, it is assumed that in step In S31 ', TDF equipment 2 is to be supplied to the first clothes using data packet such as user-A-video-packets distribution of user A Business chain identifier is the service chaining ID of acquiescence, and such as " SC-ID=SC_default_video000 ", then in step S8 ', TDF is set Standby 2 can be based on the service chaining Report Properties value in extension Sd interfaces to (Service-Chaining-Report AVP), to PCRF Equipment 1 reports the service chaining identifier " SC-ID=SC_default_video000 " for applying data packet to be assigned.

Service chaining report information is made of following at least any one：

Service chaining _ beginning：The beginning of service chaining；

Service chaining _ end：The end of service chaining；

Correspondingly, for PCRF equipment 1 by extending Sd interfaces, receive the TDF equipment reports applies data about described The service chaining relevant information of packet.

It should be noted that the present invention can be carried out in the assembly of software and/or software and hardware, for example, can adopt With application-specific integrated circuit (ASIC), general purpose computer or any other realized similar to hardware device.In one embodiment In, software program of the invention can be executed by processor to realize steps described above or function.Similarly, of the invention Software program (including relevant data structure) can be stored in computer readable recording medium storing program for performing, for example, RAM memory, Magnetic or optical driver or floppy disc and similar devices.In addition, hardware can be used to realize in some steps or function of the present invention, example Such as, coordinate to execute the circuit of each step or function as with processor.

In addition, the part of the present invention can be applied to computer program product, such as computer program instructions, when its quilt When computer executes, by the operation of the computer, it can call or provide according to the method for the present invention and/or technical solution. And the program instruction of the method for the present invention is called, it is possibly stored in fixed or moveable recording medium, and/or pass through Broadcast or the data flow in other signal loaded mediums and be transmitted, and/or be stored according to described program instruction operation In the working storage of computer equipment.Here, including a device according to one embodiment of present invention, which includes using Memory in storage computer program instructions and processor for executing program instructions, wherein when the computer program refers to When order is executed by the processor, method and/or skill of the device operation based on aforementioned multiple embodiments according to the present invention are triggered Art scheme.

It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims Variation includes within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.This Outside, it is clear that one word of " comprising " is not excluded for other units or step, and odd number is not excluded for plural number.That is stated in device claim is multiple Unit or device can also be realized by a unit or device by software or hardware.The first, the second equal words are used for table Show title, and does not represent any particular order.

Claims

1. a kind of method being used in LTE/EPC based on service link by application data packet, wherein this method includes following step Suddenly：

A TDF equipment receives what corresponding PCRF equipment was sent based on the service chaining classifying rules attribute value pair in extension Sd interfaces About the application Detection ＆ Controling rule using data packet for being supplied to user, wherein the application Detection ＆ Controling rule It is based on service chaining；

2. according to the method described in claim 1, wherein, the step b includes：

The TDF equipment is identified according to application Detection ＆ Controling rule for the application allocation of packets first service chain Symbol；

The application data packet is routed to flow-control module by TDF equipment described in b1, with by the flow-control module by institute It states and routes to service-Engine corresponding with the first service chain identifier using data packet, wherein the flow control mould Block is located on network element, the network element include in the PCRF equipment, the TDF equipment or other independent network equipments at least Any one.

3. according to the method described in claim 2, wherein, this method further includes：

The TDF equipment detects whether the application data packet has been applied second service chain identifier；

If the application data packet has been applied the second service chain identifier, the TDF equipment obtains second clothes Business chain identifier；

Wherein, the step b1 includes：

Whether the TDF equipment first service chain identifier matches with the second service chain identifier, with true The fixed application service chain identifier using corresponding to data packet；

The application data packet is routed to corresponding flow-control module by the TDF equipment, with by the flow-control module The application data packet is routed into service-Engine corresponding with the application service chain identifier.

4. according to the method described in claim 3, wherein, this method further includes：

If the first service chain identifier and the second service chain identifier mismatch, the TDF equipment are set to the PCRF Preparation send the request about the new opplication Detection ＆ Controling rule using data packet.

5. method according to any one of claim 2 to 4, wherein this method further includes：

The TDF equipment is based on the service chaining Report Properties value pair in the extension Sd interfaces, to the PCRF equipment reports institute It states using the service chaining relevant information corresponding to data packet.

6. a kind of TDF equipment being used in LTE/EPC based on service link by application data packet, wherein the TDF equipment packets It includes：

First receiving device, for based on the service chaining classifying rules attribute value pair in extension Sd interfaces, receiving corresponding PCRF and setting Preparation send about the application Detection ＆ Controling rule using data packet for being supplied to user, wherein application detection with It is based on service chaining to control rule；

7. TDF equipment according to claim 6, wherein the route device includes：

Allocation unit, for being the application allocation of packets first service chain mark according to application Detection ＆ Controling rule Know symbol；

Routing unit, for the application data packet to be routed to flow-control module, with by the flow-control module by institute It states and routes to service-Engine corresponding with the first service chain identifier using data packet, wherein the flow control mould Block is located on network element, the network element include in the PCRF equipment, the TDF equipment or other independent network equipments at least Any one.

8. TDF equipment according to claim 7, wherein the TDF equipment further includes：

Detection device, for detecting whether the application data packet has been applied second service chain identifier；

Acquisition device obtains described second if being applied the second service chain identifier for the application data packet Service chaining identifier；

Wherein, the routing unit is used for：

Whether the first service chain identifier matches with the second service chain identifier, with the determination application Application service chain identifier corresponding to data packet；

The application data packet is routed into corresponding flow-control module, with by the flow-control module by the application Data packet routes to service-Engine corresponding with the application service chain identifier.

9. TDF equipment according to claim 8, wherein the TDF equipment further includes：

Send-request unit, if mismatch is identified with the second service chain for first service chain mark, to the PCRF Equipment sends the request about the new opplication Detection ＆ Controling rule using data packet.

10. the TDF equipment according to any one of claim 7 to 9, wherein the TDF equipment further includes：

Second sending device is used for based on the service chaining Report Properties value pair in extension Sd interfaces, to the PCRF equipment reports The service chaining relevant information using corresponding to data packet.

11. a kind of PCRF equipment for assisting in LTE/EPC based on service link by application data packet, wherein the PCRF Equipment includes：

First generating means, for generating about the application Detection ＆ Controling rule using data packet for being supplied to user, In, described using Detection ＆ Controling rule is based on service chaining；

First sending device, for based on the service chaining classifying rules attribute value pair in extension Sd interfaces, the application to be detected It is sent to corresponding TDF equipment with control rule.

12. PCRF equipment according to claim 11, wherein the PCRF equipment further includes：

Reception device is asked, for receiving detecting and control about the new opplication using data packet for the TDF equipment transmission Make the request of rule；

Second generating means, for according to the request, generating and being advised about the new opplication Detection ＆ Controling using data packet Then, the new opplication Detection ＆ Controling rule is sent to the TDF equipment.

13. PCRF equipment according to claim 11 or 12, wherein the PCRF equipment further includes：

Second reception device, the service chaining correlation using corresponding to data packet for receiving the TDF equipment reports are believed Breath.

14. a kind of system being used in LTE/EPC based on service link by application data packet, wherein the system includes right It is required that the PCRF equipment described in any one of TDF equipment and claim 11 to 13 described in any one of 6 to 10.

15. a kind of system being used in the LTE/EPC for supporting software defined network based on service link by application data packet, In, which includes any one of TDF equipment and claim 11 to 13 described in any one of claim 6 to 10 institute The PCRF equipment stated.