CN1852224A - Data transmit ting device and method therefor - Google Patents
Data transmit ting device and method therefor Download PDFInfo
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- CN1852224A CN1852224A CNA2005100703578A CN200510070357A CN1852224A CN 1852224 A CN1852224 A CN 1852224A CN A2005100703578 A CNA2005100703578 A CN A2005100703578A CN 200510070357 A CN200510070357 A CN 200510070357A CN 1852224 A CN1852224 A CN 1852224A
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Abstract
The equipment includes module for forwarding data. Being connected between upstream system and downstream system, the module is in use for forwarding user data between upstream and downstream systems. The module includes control system and forwarding assembly. Under control of the control system, the forwarding assembly can forward user data between upstream and downstream systems. The invention also discloses a method for forwarding data: module for forwarding data creates data forwarding relation, which is sent to the forwarding assembly; based on data forwarding relation and stored connection relation of forwarding assembly interface, the forwarding assembly forwards user data between upstream system and downstream system. The disclosed equipment and method can reduce complexity of data forwarding equipment, and enhances flexibility of data forwarding equipment in forwarding capacity of data. Adding more forwarding assembly can support forwarding capacity to meet requirement.
Description
Technical field
The present invention relates to communication network field, be specifically related to a kind of data forwarding device and data forwarding method thereof.
Background technology
In communication network, many equipment with data forwarding function are arranged, GPRS service support node (SGSN) is exactly one of them.
Referring to Fig. 1, Fig. 1 is the SGSN data forwarding schematic diagram of prior art.Wherein, the GPRS gateway service supports node (GGSN) 110 to link to each other with inner exchanging network 132 among the SGSN 130, inner exchanging network 132 among the SGSN 130 links to each other with Access Network side apparatus 150, and Access Network side apparatus 150 normally Universal Terrestrial Radio Access Network (UTRAN) or base station sub-system (BSS) etc. is positioned at the communication equipment or the communication system of Access Network side.
Certainly, when having a plurality of Access Network side apparatus 150 such Access Network side apparatus to link to each other, then inner exchanging network 132 can be linked to each other with these Access Network side apparatus by switching network with SGSN 130; Equally, when having a plurality of GGSN 110 such GGSN to link to each other, then inner exchanging network 132 can be linked to each other with these GGSN by switching network with SGSN 130.
The major function of SGSN 130 provides routing forwarding, mobile management, session management, authentication and the encryption etc. of packet domain.Usually communicate tunnel management and transfer of data by general packet wireless service tunnel protocol (GTP) between SGSN 130 and the GGSN 110.The data forwarding module 120 that comprises control system 131, inner exchanging network 132 is used to realize routing forwarding (also the claiming data forwarding) function of SGSN 130.
Described route forwarding function comprises: will send to GGSN110 from the data of Access Network side apparatus 150; To send to Access Network side apparatus 150 from the data of GGSN 110.Control system 131 in the data forwarding module 120 provides and the corresponding support of described route forwarding function for SGSN 130 jointly with inner exchanging network 132.Wherein, the corresponding signaling and the flow process control that are used to transmit data that control system 131 carries out stipulating in the present communication protocol, as: after inner exchanging network 132 received data, the data forwarding strategy of using when inner switching network 132 is carried out data forwarding was controlled etc.Described forwarding strategy has load balance commonly used at present, lost efficacy forwarding, flow control etc.
The data forwarding capacity of SGSN 130 depends on the data forwarding ability of inner exchanging network 132, and inner exchanging network 132 normally is the router or the ATM(Asynchronous Transfer Mode) switch of core devices by large scale integrated chip (LSI chip).The arithmetic logic of the large scale integrated chip (LSI chip) in the inner exchanging network 132 has very high complexity, and along with the raising of data forwarding capacity, the implementation complexity and the cost of inner exchanging network 132 can be more and more higher; And after the data forwarding capacity of SGSN 130 acquired a certain degree, the data forwarding ability of inner exchanging network 132 can be difficult to further promote because of being limited to prior art, causes the data forwarding capacity of SGSN 130 to be difficult to further enlarge.
Generally speaking, the configuration of the hardware configuration of inner exchanging network 132 and software logic can guarantee can to communicate by letter in twos between a, b that inner exchanging network 132 provides, c, d, e, f, the data forwarding interfaces such as g, h, but because the route forwarding function of SGSN 130 is that is: SGSN 130 will send to GGSN 110 from the data of Access Network side apparatus 150 in order to support the forwarding of data between Access Network side apparatus 150 and GGSN 110; To send to Access Network side apparatus 150 from the data of GGSN 110.
So, can think to a certain extent, inner exchanging network 132 is applied among the SGSN 130 so that the route forwarding function of SGSN 130 to be provided, and the high complexity of the high integration of the large scale integrated chip (LSI chip) in the inner exchanging network 132 and arithmetic logic thereof has caused more serious cost waste.
When SGSN 130 receives data from GGSN 110, and when Access Network side apparatus 150 is transmitted these data, there is the problem of above-mentioned cost waste equally.
In addition, when Access Network side apparatus 150 and/or GGSN 110 are will be via the data volume that SGSN 130 transmits big, will improve the data forwarding ability of inner exchanging network 132 relatively, improving described data forwarding ability then needs the further integrated level of large scale integrated chip (LSI chip) in the inner exchanging network 132 and the complexity of arithmetic logic thereof of improving, to guarantee that inner exchanging network 132 can carry out fast mass data, correct, reasonably forwarding.Yet because the restriction of technical development and inner exchanging network 132 hardware configurations, the data forwarding ability of inner exchanging network 132 is difficult to further promote, and causes the data forwarding capacity of SGSN130 to be difficult to further enlarge.
Except the such data transfer equipment of above-mentioned SGSN 130, the GPRS gateway service of using is supported node (GGSN), radio network controller equipment such as (RNC) also to include to be used to carry out the described data forwarding module of data forwarding and identical inside modules structural relation among the above-mentioned SGSN 130 at present.When the such equipment of GGSN, RNC carries out data forwarding when operation, the cost waste problem that the high complexity of the high integration of large scale integrated chip (LSI chip) of above-mentioned SGSN 130 and arithmetic logic thereof is brought can appear being similar to equally; Also exist the data forwarding capacity that occurs when mass data transmitted to be difficult to the problem that further enlarges.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of data forwarding device, can realize cheaply data forwarding and be convenient to enlarge the data forwarding capacity.
Another object of the present invention is to provide a kind of data forwarding method, the complexity when reducing data forwarding is saved cost; Improve the data forwarding ability.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of data forwarding device, comprise data forwarding module, this module is connected between up-stream system and the down-stream system, is used to transmit the user data between up-stream system and the down-stream system; This data forwarding module comprises:
Control system is used to generate and supports each to transmit parts to carry out the data forwarding relation of data forwarding and send to corresponding forwarding parts and control is transmitted parts and carried out data forwarding;
One or more forwarding parts store the interface annexation between its data forwarding interface and up-stream system, the down-stream system, and each transmits parts and control system is connected with each other by communication bus; Wherein, each is transmitted parts and comprises at least one up-stream system side interface, also comprise at least one down-stream system side interface, the forwarding parts are used to receive the data forwarding relation from control system, be identified for transmitting the down-stream system side interface and the up-stream system side interface of user data according to this data forwarding relation and described interface annexation, and will forward by this up-stream system side interface by the user data that this down-stream system side interface receives and will forward by this down-stream system side interface by the user data that this up-stream system side interface receives.
Described forwarding parts comprise:
Bus Interface Unit links to each other with described control system and the control unit transmitted in the parts respectively, is used for the data forwarding from the control system concerned sending to control unit;
Control unit links to each other with data forwarding unit, data storage cell respectively, and the data forwarding relation that is used for receiving sends to the data forwarding unit, and the software program of the support control unit of storing in service data memory cell operation;
The data forwarding unit links to each other with data storage cell, at least one interface adaptation unit respectively, be used for and described interface adaptation unit between carry out user data and transmit, and the user data that can't in time send sends to data storage cell and temporarily stores;
Data storage cell stores the software program of supporting the control unit operation, and is used to receive user data and storage from the data forwarding unit;
One or more interface adaptation unit provides described up-stream system side interface and described down-stream system side interface, is used to support the user data between data retransmission unit and described up-stream system side interface and the down-stream system side interface to transmit.
Described control unit is a central processing unit, and described data forwarding unit is a network processor chip.
Described data forwarding module is arranged among the GPRS service support node SGSN, and described up-stream system is that the GPRS gateway service is supported node GGSN, and described down-stream system is the Access Network side apparatus; Or,
Described data forwarding module is arranged in the radio network controller (RNC), and described up-stream system is SGSN, and described down-stream system is base station node B.
Described Access Network side apparatus is Universal Terrestrial Radio Access Network UTRAN or base station sub-system BSS.
The invention also discloses a kind of data forwarding method, this method may further comprise the steps:
A. the control system of the data forwarding module that comprises of data forwarding device receives user's request by transmitting parts, asks to generate at the data forwarding relation of user data and sends to this forwarding parts according to this user;
B. transmit parts according to from the interface annexation between its data forwarding interface of the data forwarding of control system relation and storage and up-stream system, the down-stream system, be identified for transmitting the down-stream system side interface and the up-stream system side interface of user data; And the follow-up user data that is received by this down-stream system side interface is forwarded by this up-stream system side interface and will be forwarded by this down-stream system side interface by the user data that this up-stream system side interface receives.
Among the step a, control system specifically comprises by the method that described forwarding parts receive user's request:
The user sends user's request, and down-stream system sends to described forwarding parts with this user's request after receiving this user's request; These forwarding parts send to described control system with user's request of receiving.
Among the step a, the method that described control system generates the data forwarding relation and sends to described forwarding parts specifically comprises:
Transfer of data priority and service bandwidth information that control system comprises according to described user's request, carry out Signalling exchange and generate the data forwarding relation by described forwarding parts and described up-stream system, again this data forwarding relation is sent to described forwarding parts and preserve according to the result of Signalling exchange; Or,
Control system directly generates the data forwarding relation according to transfer of data priority and the service bandwidth information that described user's request comprises, and this data forwarding relation is sent to described forwarding parts preservation.
Among the step b, described forwarding parts are identified for transmitting the down-stream system side interface of user data and the method for up-stream system side interface is:
These forwarding parts read down-stream system sign and the up-stream system sign that comprises in the described data forwarding relation, and be identified at the down-stream system side interface of searching in the described interface annexation on these forwarding parts that link to each other with this down-stream system with up-stream system according to this down-stream system sign, also search the up-stream system side interface on these forwarding parts that link to each other with this up-stream system, and the down-stream system side interface that finds the most at last and up-stream system side interface are as the down-stream system side interface and the up-stream system side interface that are used to transmit described user data.
Described data forwarding device is arranged among the SGSN, and described up-stream system is GGSN, and described down-stream system is the Access Network side apparatus.
Among the step a, when described user request was the routing update request, the method that described control system generates the data forwarding relation and sends to described forwarding parts specifically comprised:
Al. described control system sends the component update request of transmitting by the forwarding parts that receive the routing update request to GGSN, this request comprises the user profile that sends routing update requesting users terminal, and the internet protocol IP of the forwarding parts address that receives described routing update request;
After a2.GGSN receives the request of described forwarding component update, upgrading current with the forwarding parts IP address that receives described routing update request is that described user terminal is transmitted forwarding of data parts IP address, and sends the response of forwarding component update by the forwarding parts that receive described routing update request to control system;
A3. after control system receives and transmits the component update response, concern, and this data forwarding is concerned that sending to these forwarding parts preserves for the forwarding parts that receive described routing update request generate data forwarding.
Among the step a3, control system receives after the described forwarding component update response, generates before the described data forwarding relation, and this method further comprises:
Control system is according to the transfer of data priority and the service bandwidth information at described user data of preserving, carry out Signalling exchange by forwarding parts and the GGSN that receives described routing update request, be used for according to the Signalling exchange result for these forwarding parts generate described data forwarding relation.
Among the step a, when described user's request was the routing update request, after described control system was received this routing update request, this method further comprised:
Control system to current be that described user terminal is transmitted the forwarding of data parts and sent the routing update indication, these forwarding parts receive and stop after this indication sending the user data relevant with this user terminal via self Access Network side interface, and this user terminal data that self GGSN side interface is received and the described user data that stops to send send to the forwarding parts that receive described routing update request.
Described data forwarding device is arranged among the RNC, and described up-stream system is SGSN, and described down-stream system is Node B.
As seen, data forwarding device provided by the invention comprises the data forwarding module that is connected between up-stream system and the down-stream system and transmits parts, transmits parts and can transmit user data under the control of control system between up-stream system and down-stream system.Data forwarding method provided by the invention is generated the data forwarding relation and is sent to the forwarding parts by data forwarding module earlier; Afterwards, transmit the data forwarding interface annexation of parts, between up-stream system and down-stream system, transmit user data according to this data forwarding relation and storage.
Data forwarding device of the present invention can be realized cheaply data forwarding and be convenient to enlarge the data forwarding capacity.Data forwarding method of the present invention, the low advantage of complexity when having data forwarding, thereby can save cost; And, when needs enlarge the data forwarding amount of data forwarding device, as long as in this data forwarding device, add to be used for data forwarding into the forwarding parts of some.
Description of drawings
Fig. 1 is the SGSN data forwarding schematic diagram of prior art;
Fig. 2 is the data forwarding schematic diagram of a preferred embodiment of the present invention;
Fig. 3 is the structure chart of the forwarding parts that SGSN comprises among Fig. 2;
Fig. 4 is that the component update schematic diagram is transmitted in the service of SGSN among Fig. 2;
Fig. 5 is the data forwarding schematic diagram of another preferred embodiment of the present invention;
Fig. 6 carries out the data forwarding schematic diagram for data forwarding device of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments to the detailed description of the invention.
Data forwarding device provided by the invention comprises data forwarding module, and this module is connected between up-stream system and the down-stream system; This module comprises control system and transmits parts, and these forwarding parts can transmitted user data under the control of control system between up-stream system and down-stream system.
Data forwarding method provided by the invention is generated the data forwarding relation and is sent to the forwarding parts by data forwarding module earlier; Afterwards, transmit the data forwarding interface annexation of parts, between up-stream system and down-stream system, transmit user data according to this data forwarding relation and storage.
Data forwarding device of the present invention can be arranged in any equipment with data forwarding function, as: SGSN, RNC, GGSN etc.
Understanding the present invention for convenience, is example with SGSN and RNC respectively below, and data forwarding device of the present invention and data forwarding method thereof are described.
At first be described at SGSN:
Referring to Fig. 2, Fig. 2 is the data forwarding schematic diagram of a preferred embodiment of the present invention.Wherein, comprise control system 231 in the data forwarding module 220 of SGSN230 and transmit forwarding parts such as parts 232, forwarding parts 233, forwarding parts 234.
Control system 231 is transmitted between the parts and is linked to each other by internal communication bus with each.Each is transmitted parts two data forwarding interfaces is provided at least, and one of them interface is the Access Network side interface, and this interface links to each other with Access Network side apparatus 250; The another one interface is the GGSN side interface, and this interface links to each other with GGSN 210.Access Network side apparatus 250 normally UTRAN or BSS etc. is positioned at the communication equipment or the communication system of Access Network side.
Certainly, when having a plurality of Access Network side apparatus 250 such Access Network side apparatus to link to each other, then the above-mentioned parts of respectively transmitting can be linked to each other with these Access Network side apparatus by switching network with SGSN 230; Equally, when having a plurality of GGSN 210 such GGSN to link to each other, then each can be transmitted parts and link to each other with these GGSN by switching network with SGSN 230.
In the data forwarding module 220 of SGSN 230, the corresponding signaling and the flow process control that are used to transmit data that control system 231 carries out stipulating in the present communication protocol, as: when transmitting parts 232 and receive data from Access Network side apparatus 250, control etc. transmitting the data forwarding strategy of using when parts 232 carry out data forwarding.
Here said forwarding strategy also comprises the data forwarding relation of respectively transmitting parts except comprising load balance commonly used at present, inefficacy forwarding, flow control etc.The data forwarding relation here is meant: transmitting parts will be for carrying out the forwarding of user data between which access network equipment and which GGSN.This data forwarding relation can be represented with the corresponding relation between the signs such as IP address of sign such as Internet protocol (IP) address of access network equipment and GGSN.
Transmit forwarding parts such as parts 232, forwarding parts 233, forwarding parts 234 normally a veneer or the chip that can carry out data forwarding, and SGSN 230 is that each transmits the different IP address of parts distribution.As described above, be provided with two data forwarding interfaces at least on above-mentioned each forwarding parts, one of them interface is the Access Network side interface, and the another one interface is the GGSN side interface.Also can on the forwarding parts, plural data forwarding interface be set in actual applications, at this moment the total interface on these forwarding parts then totally is divided into two classes, one class interface is the Access Network side interface, and this class interface and Access Network side apparatus 250 such Access Network side apparatus link to each other; An other class interface is the GGSN side interface, and this class interface and GGSN 210 such GGSN link to each other.
The above-mentioned interface annexation that stores respectively in the parts between the such GGSN of the such Access Network side apparatus of its data forwarding interface and Access Network side apparatus 250 and its data forwarding interface and GGSN 210 of respectively transmitting, as: which data forwarding interface of forwarding parts 232, forwarding parts 233 and forwarding parts 234 links to each other with Access Network side apparatus 250, and which data forwarding interface of transmitting parts 232, forwarding parts 233 and forwarding parts 234 links to each other with GGSN 210.This interface annexation is represented with the corresponding relation between the sign of the sign of described Access Network side apparatus and the forwarding parts that link to each other with this Access Network side apparatus usually; And represent with the corresponding relation between the sign of the sign of described GGSN and the forwarding parts that link to each other with this GGSN.
Described interface annexation is normally issued to forwarding parts 232, forwarding parts 233, forwarding parts 234 such forwarding parts with forms such as forms in advance by control system 231.
Usually, user terminal 260 can send customer service request (Create PDPContext Request) before communicating.After Access Network side apparatus 250 was received this request, certain transmitted parts with this request sends among the SGSN230, suppose that forwarding parts 233 have received this request.So, transmit parts 233 this request is sent to control system 231, the information that control system 231 comprises the customer service request of receiving is usually preserved.Described customer service request generally includes information such as transfer of data priority at user data, service bandwidth.
Afterwards, information such as the transfer of data priority that control system 231 comprises according to above-mentioned customer service request, service bandwidth, carry out service quality (QoS) the negotiations Signalling exchange of etc.ing stipulated in the present agreement by transmitting parts 233 and GGSN 210, can accept this customer service request with assurance GGSN 210 normally is that the user provides follow-up services such as data transmit-receive also; Afterwards, control system 231 generates data forwarding strategy at user terminal 260 according to the result of described Signalling exchange, this data forwarding strategy is sent to transmit parts 233 again, transmits parts 233 the data forwarding strategy of receiving is preserved.
Above-mentioned Signalling exchange result is generally information such as transfer of data priority, service bandwidth, the described data forwarding strategy that generates then comprises these Signalling exchanges result, and also comprise the data forwarding relation when transmitting parts 233 and transmitting described user data: transmitting parts 233 will be for carrying out the forwarding of user data between access network equipment 250 and the GGSN 210.
Transmitting parts 233 receives and has preserved behind the above-mentioned data forwarding strategy to send to control system 231 and confirmed response (Create PDP Context Ack), control system 231 is received this response back by transmitting parts 233, Access Network side apparatus 250 to user terminal 260 transmission service request affirmation responses, and user terminal 260 receives that this response back just can send user data.
After transmitting parts 233 and receiving described data forwarding strategy, just described data forwarding relation that can comprise according to this data forwarding strategy and the described interface annexation of self storing are identified for transmitting the GGSN side interface and the Access Network side interface of user data.Concrete operations are: transmit parts 233 and read the sign of the GGSN that comprises in the described data forwarding relation and the sign of Access Network side apparatus, and be identified at certain GGSN side interface of searching in the described interface annexation on the forwarding parts 233 that link to each other with this GGSN according to this GGSN sign and this Access Network side apparatus, also search with forwarding parts 233 that this Access Network side apparatus links to each other on certain Access Network side interface, and this GGSN side interface that finds the most at last and this Access Network side interface are as the GGSN side interface and the Access Network side interface that are used to transmit described user data.
Like this, when transmitting parts 233 and in subsequent operation, receive the data of user terminal 260, just these data are forwarded by described GGSN side interface by described Access Network side interface; Also the data of the user terminal 260 that will be received by described GGSN side interface are forwarded by described Access Network side interface.
If transmitting parts 233 is directly to link to each other with the Access Network side apparatus with described GGSN by physical connection, the described user data that is sent by described GGSN side interface will be sent directly to described GGSN so; The described user data that is sent by described Access Network side interface will be sent directly to described Access Network side apparatus.
Certainly, link to each other with the Access Network side apparatus with described GGSN by switching network if transmit parts 233, the described user data that is sent by described GGSN side interface will send to described GGSN by described switching network so; The described user data that is sent by described Access Network side interface will send to described Access Network side apparatus by described switching network.
In actual applications, can carry out the sequence of operations described in Fig. 2 in order to make described forwarding parts, need carry out design shown in Figure 3 to transmitting parts, Fig. 3 is the structure chart of the forwarding parts that SGSN comprises among Fig. 2.
Among Fig. 3, transmit parts 300 and comprise: data forwarding unit 302; And first memory cell 301 that links to each other with data forwarding unit 302, control unit 306, the first interface adaptation unit 303 and the second interface adaptation unit 304; Also comprise the Bus Interface Unit 305, second memory cell 307 that link to each other with control unit 306.
Wherein, Bus Interface Unit 305 provides physical interface for the control system among the SGSN and control unit 306 carry out the information transmission, make control system and control unit 306 each other can interaction data, information such as signaling.Control unit 306 is used for supporting the information transmission between the control system of data retransmission unit 302 and SGSN, as: control unit 306 will send to data forwarding unit 302 from the data forwarding strategy that comprises the data forwarding relation of above-mentioned control system, also will send to control system from operating state, the basic configuration data of data forwarding unit 302 and the information such as signaling that receive.Control unit 306 can use central processing unit (CPU) to realize.
In fact, also can make it can realize 306 functions that can realize of control unit, and the device that will link to each other with control unit 306 directly link to each other with data forwarding unit 302 by data retransmission unit 302 is designed.But comparatively speaking, can make the operation logic of data forwarding unit 302 too complicated like this; It might be because will carry out too complicated logical calculated when transmitting data, and the data forwarding speed that slows down, and then reduction data forwarding efficient, influence user satisfaction.
In all external interfaces that the first interface adaptation unit 303 and the second interface adaptation unit 304 provide, have a GGSN side interface and an Access Network side interface at least, can transmit data via this GGSN side interface and this Access Network side interface to guarantee data forwarding unit 302.Certainly, the first interface adaptation unit 303 and the second interface adaptation unit 304 also can provide an above GGSN side interface and an above Access Network side interface respectively.
In the practical application, transmit parts and also can include only the first interface adaptation unit 303 or the second interface adaptation unit 304, as long as this interface unit can provide at least one GGSN side interface and at least one Access Network side interface.
When data forwarding unit 302 has data to have little time to transmit, then these data are sent to first memory cell 301 and preserve, and data forwarding unit 302 is understood real-times or periodically sent data conversion transmission informations such as transceive data amounts and packet loss to control unit 306.Second memory cell 307 is used for depositing the necessary software program of supporting control unit 306 operations and some significant datas of transmitting parts 300, as: control unit 306 receive from data conversion transmission information as described in the data forwarding unit 302, and this data conversion transmission information added up, again statistics is sent to 307 storages of second memory cell.Control unit 306 then can be carried out the described software program of storage in second memory cell 307 when operation, carry out corresponding operating to use this software program.
Transmit parts 300 and may further include the debugging unit 308 that links to each other with control unit 306, be used for receiving the debug command that external debug equipment is sent, and control unit 306 carried out corresponding debugging operations according to this order by its debugging interface.
As previously mentioned, respectively transmitting parts and all can link to each other among the SGSN with certain Access Network side apparatus.But situation shown in Figure 4 might occur in actual applications, that is: the forwarding of first among the SGSN 420 parts 421 link to each other with the first Access Network side apparatus 430 and GGSN 410, and do not link to each other with the second Access Network side apparatus 440; Among the SGSN 420 second transmits parts 422 and links to each other with the second Access Network side apparatus 440 and GGSN 410, and do not link to each other with the first Access Network side apparatus 430.For convenience, omitted among this figure first and transmitted the switching network that may be connected with between the parts 421 and the first Access Network side apparatus 430, also omitted second and transmitted the switching network that may be connected with between the parts 422 and the second Access Network side apparatus 440.
After user terminal 450 moves to the signal cover of the second Access Network side apparatus 440 from the signal cover of the first Access Network side apparatus 430,450 of user terminals can't be via the first Access Network side apparatus, 430 transceive data, and can only be via the second Access Network side apparatus, 440 transceive data.Yet because GGSN 410 does not know the signal cover at user terminal 450 places variation has not taken place, so GGSN 410 still transmits the data that parts 421 will send to user terminal 450 by first and sends to the first Access Network side apparatus 430, but this moment, the first Access Network side apparatus 430 can't send to user terminal 450 with described data.
This will cause down user data can't send to user terminal 450, and 450 of user terminals are difficult to proper communication because can't normally receive downlink data.
Therefore, will transmit parts to the service that service is provided for user terminal 450 and upgrade when above-mentioned situation takes place, concrete update method may further comprise the steps:
The first step: user terminal 450 sends routing update request (Routing Area UpdateRequest), comprises the first Access Network side apparatus, 430 pairing Routing Area Identifiers (RAI) in this request.After the second Access Network side apparatus 440 is received this request, this request is sent to the second forwarding parts 422 that link to each other with self.After the second forwarding parts 422 are received described routing update request, this request is sent to control system 400.
Second step: control system 400 reads the described RAI that comprises in the routing update request of receiving, and the RAI that stores in advance according to self and each transmit the corresponding relation of parts, knows that current what provide the data forwarding service for user terminal 450 is first to transmit parts 421.Afterwards, control system 400 is transmitted parts 421 to first and is sent the routing update indication, the user profile and second that comprises user terminal 450 in this indication is transmitted the sign of parts 422, the described second forwarding parts, 422 signs can be the IP addresses of the second forwarding parts 422, also can be the identifiers that are used to distinguish different forwarding parts that in SGSN 420, are provided with, the routing update of receiving be referred to send to the second forwarding parts 422 as long as the first forwarding parts 421 can be transmitted parts 422 signs according to second.
Though current first transmits the data forwarding work that parts 421 are still being born user terminal 450, but be updated to the second forwarding parts 422 because the operating main body of this data forwarding work will be transmitted parts 421 by first, be called former forwarding parts so can transmit parts 421 with first; In like manner, can call new forwarding parts promptly transmitting parts 422 for second of user terminal 450 forwarding data.
The 3rd step: first transmits parts 421 receive routing update indication from control system 400 after, stop to send the user data relevant, and self GGSN side interface all user data relevant with user terminal 450 that receive and that no longer continue transmission are preserved with user terminal 450 via self Access Network side interface.And first transmits parts 421 according to second sign of transmitting parts 422 that the routing update indication comprises, and the described user data of preserving is sent to second transmit parts 422.Second transmits the described user data of parts 422 preservations from the first forwarding parts 421.
Have again, after the first forwarding parts 421 are received above-mentioned routing update indication, also send to upgrade and confirm to respond, transmit parts 421 and received this routing update indication to inform control system 400 first to control system 400.
The 4th step: control system 400 is carried out the operation of data forwarding component update with GGSN 410 after receiving and confirming response from first renewal of transmitting parts 421.Concrete forwarding component update is operating as: control system 400 is transmitted parts 422 to second and is sent forwarding component update request (Update PDP ContextRequest), comprises the user profile and the second IP address of transmitting parts 422 of user terminal 450 in this request.After the second forwarding parts 422 are received this request, this request is sent to GGSN 410.
The 5th step: after GGSN 410 received the request of above-mentioned forwarding component update, being known as user terminal 450 according to the second IP address of transmitting parts 422 that comprises in this request provided the forwarding parts of service to become the second forwarding parts 422 by the first forwarding parts 421; The first IP address of transmitting parts 421 that 410 of GGSN will preserve is updated to the second IP address of transmitting parts 422.Afterwards, GGSN 410 transmits parts 422 to second and sends forwarding component update response (Update PDP ContextResponse).
Like this, GGSN 410 then sends the data of user terminals 450 to the second forwarding parts 422 in subsequent operation, and no longer transmits the data that parts 421 send user terminals 450 to first.
The 6th step: the second forwarding parts 422 send to control system 400 with this response after receiving and transmitting the component update response.After control system 400 is received this response, generate data forwarding strategy, and this data forwarding strategy is sent to 422 preservations of the second forwarding parts at user terminal 450; And control system 400 is also transmitted parts 422 transmission routing updates to second and is accepted message (Routing Area UpdateAccept), after the second forwarding parts 422 are received this message, this message is sent to the second Access Network side apparatus 440.After the second Access Network side apparatus 440 is received this message, this message is sent to user terminal 450.
Certainly, control system 400 is received when described renewal responds, can not generate described data forwarding strategy earlier, but preserve according to self at information such as the transfer of data priority of user terminal 450 data and service bandwidths, further carry out the Signalling exchanges such as QoS negotiation stipulated in the present agreement, to guarantee that GGSN 410 can normally be that the user provides follow-up services such as data transmit-receive with GGSN 410.Afterwards, control system 400 generates data forwarding strategy at user terminal 450 according to the result of described Signalling exchange again, and this data forwarding strategy is sent to second transmits parts 422 and preserve.
After the second forwarding parts 422 are received this data forwarding strategy, the data forwarding relation that just can comprise according to this data forwarding strategy and the interface annexation of self storage, be identified for transmitting the GGSN side interface and the Access Network side interface of user terminal 450 data, can also will send by the described Access Network side interface of determining afterwards from the first described user data of transmitting parts 421.
The 7th step: after user terminal 450 receives that message is accepted in above-mentioned routing update, send routing update and finish message (Routing Area Update Complete).After the second Access Network side apparatus 440 receives this message, this message is transmitted parts 422 via second send to control system 400.
So far, the more new technological process of service forwarding parts just is through with.
Like this, in subsequent operation, the second GGSN side interface of transmitting parts 422 can be received the data from the user terminal 450 of GGSN 410; Have, user terminal 450 moves to after the signal cover of the second Access Network side apparatus 440 again, and the second Access Network side interface of transmitting parts 422 can be received the data from user terminal 450.At this moment, the second forwarding parts 422 just can be transmitted the described user data that receives according to the GGSN side interface and the Access Network side interface that are used to transmit described user data determined.
The concrete forwarding is operating as: second transmits parts 422 will be forwarded by described Access Network side interface by the described user data that described GGSN side interface receives; Also will forward by described GGSN side interface by the described user data that described Access Network side interface receives.
If there are a plurality of forwarding parts to link to each other with the second Access Network side apparatus 440, when serving the renewal of transmitting parts, 440 described routing update requests of transmission in these a plurality of forwarding parts of the second Access Network side apparatus, follow-up update method is identical with aforesaid corresponding update method.
From the above, why to carry out second and go on foot the 3rd operation that goes on foot, be because user terminal 450 shifts out after the signal cover of the first Access Network side apparatus 430 the more new technological process of transmitting parts to service finish before, first transmits parts 421 has low volume data to send to user terminal 450 by the first Access Network side apparatus 430, but in fact user terminal 450 can't receive these data by the first Access Network side apparatus 430.Just preserve these data so first transmits parts 421, and in follow-up corresponding operating, these data are sent to second and transmit parts 422, make the second forwarding parts 422 these data be sent to user terminal 450 by the second Access Network side apparatus 440, so that user terminal 450 can as much as possiblely receive the data that it should receive in communication process, guarantee that the communication of user terminal 450 can be carried out smoothly.
Above-mentioned second goes on foot the steps necessary in the more new technological process that the 3rd step was not service forwarding parts, can not influence the normally new technological process more that parts are transmitted in service even do not carry out these steps yet, and only can be to the less influence of proper communication generation of user terminal 450, so can directly enter for the 4th step by the first step, carry out described forwarding component update operation and generate described data forwarding strategy with GGSN 410 by the control system 400 of receiving described routing update request, again this data forwarding strategy is sent to second and transmit parts 422.
As seen, the control system among the SGSN generates at this user's data forwarding strategy after the routing update request of receiving from the user, and this data forwarding strategy is sent to the new forwarding parts of soon transmitting data for the user.Like this, new forwarding parts are follow-up for this when receiving user data, and then the data forwarding relation that comprises according to described data forwarding strategy and the described interface annexation of self storage are normally carried out the forwarding of user data.
By the above as can be known, no longer the applications exchange network carries out data forwarding in SGSN, but application structure and data forwarding method are all relatively simply transmitted parts and carried out data forwarding.Control system among the SGSN generates at described user's data forwarding strategy and sends to and transmit the parts preservation after receiving user's requests such as above-mentioned customer service request, routing update request; Make to transmit when parts are follow-up receives user data, the data forwarding relation that can comprise according to the data forwarding strategy of receiving and the described interface annexation of self storage are normally carried out the forwarding of user data.
Also just be based on above-mentioned simple relatively data forwarding method, the forwarding parts among the SGSN can design simply relatively, and each forwarding parts also needn't be supported excessive data forwarding amount.When the data forwarding amount of SGSN need increase, as long as in SGSN, add to be used for data forwarding into the forwarding parts of some.
The equipment such as GGSN, RNC that have similar data forwarding function with the such data transfer equipment of SGSN, also can as the SGSN among Fig. 2 230, carry out the corresponding structure setting, and application and the identical data forwarding method of SGSN 230 principles, only GGSN carries out data forwarding between SGSN and extranets, and RNC carries out data forwarding between base station node B and SGSN.
Below, just simply describe at RNC again:
Referring to Fig. 5, Fig. 5 is the data forwarding schematic diagram of another preferred embodiment of the present invention.Wherein, comprise control system 531 in the data forwarding module 520 of RNC530 and transmit forwarding parts such as parts 532, forwarding parts 533, forwarding parts 534.Control system 531 is transmitted between the parts and is linked to each other by internal communication bus with each.Each is transmitted parts two data forwarding interfaces is provided at least, and one of them interface is a Node B side interface, and this interface links to each other with Node B 550; The another one interface is the SGSN side interface, and this interface links to each other with SGSN 510.
In the data forwarding module 520 of RNC 530, the corresponding signaling and the flow process control that are used to transmit data that control system 531 carries out stipulating in the present communication protocol, as: receive when inserting the data of Node B 550 transmitting parts 532, control etc. transmitting the data forwarding strategy of using when parts 532 carry out data forwarding.Here said forwarding strategy also comprises the data forwarding relation of respectively transmitting parts except comprising load balance commonly used at present, inefficacy forwarding, flow control etc.Here said data forwarding relation concerns identical with described data forwarding in the earlier figures 2.
Technically, described control system must issue described data forwarding relation to described forwarding parts, is used to support these forwarding parts that described data are transmitted.And comprise in the described data forwarding strategy be applied to load balance of the prior art, the forwarding of losing efficacy, flow control etc., then be not to transmit the content that parts issue to this; Because, do not issue contents such as load balance to these forwarding parts, the effect in the time of only can influencing this forwarding parts forwarding user data, and can not cause these forwarding parts can't transmit user data.
Among Fig. 5 each transmitted on the parts and is provided with two data forwarding interfaces at least, and one of them interface is a Node B side interface, and the another one interface is the SGSN side interface.Also can plural data forwarding interface be set transmitting on the parts in actual applications, at this moment the total interface on these forwarding parts then totally is divided into two classes, and a class interface is a Node B side interface, and this class interface and Node B 550 such Node B link to each other; An other class interface is the SGSN side interface, and this class interface and SGSN 510 such SGSN link to each other.
Have, the described parts of respectively transmitting all have internal structure shown in Figure 3 again.
The above-mentioned interface annexation that stores respectively in the parts between the such SGSN of the such Node B of its data forwarding interface and Node B 550 and its data forwarding interface and SGSN 510 of respectively transmitting.This interface annexation is normally issued to forwarding parts 532, forwarding parts 533, forwarding parts 534 such forwarding parts with forms such as forms in advance by control system 531.
User terminal can send the customer service request before communicating.After Node B 550 received this request, certain transmitted parts with this request sends among the RNC 530, suppose that forwarding parts 533 have received this request.So, transmit parts 533 and again this request is sent to control system 531.
Afterwards, information such as the transfer of data priority that control system 531 comprises according to above-mentioned customer service request, service bandwidth, carry out the Signalling exchanges such as QoS negotiation stipulated in the present agreement by transmitting parts 533 and SGSN 510, to select the SGSN that links to each other with self is described user's service, suppose that control system 531 selection SGSN 510 serve for described user.Afterwards, control system 531 generates data forwarding strategy at described user terminal according to the result of described Signalling exchange, this data forwarding strategy is sent to transmit parts 533 again, transmits parts 533 the data forwarding strategy of receiving is preserved.
Comprise the data forwarding relation when transmitting parts 533 and transmitting described user data in the described data forwarding strategy: transmitting parts 533 will be for carrying out the forwarding of user data between Node B 550 and the SGSN 510.
Transmitting parts 533 receives and has preserved behind the above-mentioned data forwarding strategy to send to control system 531 and confirmed response, control system 531 is received this response back by transmitting parts 533, Node B 550 to described user terminal transmission service request affirmation response, and this user terminal receives that this response back just can send user data.
After forwarding parts 533 are received described data forwarding strategy, the just described data forwarding relation that can comprise according to this data forwarding strategy and the described interface annexation of self storage, be identified for transmitting the SGSN side interface and the Node B side interface of described user data, described definite method is identical with corresponding definite method in the earlier figures 2.Like this, when transmitting parts 533 and in subsequent operation, receive described user data, just this user data is forwarded by described SGSN side interface by described Node B side interface; Also will forward by described Node B side interface by the described user data that described SGSN side interface receives.
As seen, RNC shown in Figure 5 530 comprises the data forwarding module with same structure and data forwarding function with SGSN 230 shown in Figure 2.Therefore, the same shown in can image pattern 6, GGSN shown in Figure 2 210 and SGSN 510 shown in Figure 5 are referred to as up-stream system 610, Access Network side apparatus shown in Figure 2 250 is referred to as down-stream system 650 with Node B 550 shown in Figure 5, SGSN shown in Figure 2 230 and RNC 530 shown in Figure 5 are referred to as data forwarding device 630.
In the data forwarding interface that data forwarding module 620 in the data forwarding device 630 is comprised, the data forwarding interface that will link to each other with the such down-stream system of Access Network side apparatus 250 or Node B 550 is referred to as the down-stream system side interface; The data forwarding interface that will link to each other with the such up-stream system of GGSN 210 or SGSN 510 is referred to as the up-stream system side interface.
The internal structure and the data forwarding function of the internal structure of the data forwarding module 620 of data forwarding device 630 and data forwarding function and Fig. 2, corresponding data forwarding module shown in Figure 5 are identical; And, data forwarding module 620 data forwarding method for carrying out the user data forwarding between down-stream system 650 and the up-stream system 610 is identical with relative users data forwarding method among Fig. 2, Fig. 5.
As seen, data forwarding device of the present invention can be realized cheaply data forwarding and be convenient to enlarge the data forwarding capacity.Data forwarding method of the present invention, the low advantage of complexity when having data forwarding, thereby can save cost; And, when needs enlarge the data forwarding amount of data forwarding device, as long as in this data forwarding device, add to be used for data forwarding into the forwarding parts of some.Above-mentioned advantage carries out showing especially obviously when big data quantity is transmitted at data forwarding device.
Claims (14)
1, a kind of data forwarding device comprises data forwarding module, and this module is connected between up-stream system and the down-stream system, is used to transmit the user data between up-stream system and the down-stream system; It is characterized in that this data forwarding module comprises:
Control system is used to generate and supports each to transmit parts to carry out the data forwarding relation of data forwarding and send to corresponding forwarding parts and control is transmitted parts and carried out data forwarding;
One or more forwarding parts store the interface annexation between its data forwarding interface and up-stream system, the down-stream system, and each transmits parts and control system is connected with each other by communication bus; Wherein, each is transmitted parts and comprises at least one up-stream system side interface, also comprise at least one down-stream system side interface, the forwarding parts are used to receive the data forwarding relation from control system, be identified for transmitting the down-stream system side interface and the up-stream system side interface of user data according to this data forwarding relation and described interface annexation, and will forward by this up-stream system side interface by the user data that this down-stream system side interface receives and will forward by this down-stream system side interface by the user data that this up-stream system side interface receives.
2, data forwarding device as claimed in claim 1 is characterized in that, described forwarding parts comprise:
Bus Interface Unit links to each other with described control system and the control unit transmitted in the parts respectively, is used for the data forwarding from the control system concerned sending to control unit;
Control unit links to each other with data forwarding unit, data storage cell respectively, and the data forwarding relation that is used for receiving sends to the data forwarding unit, and the software program of the support control unit of storing in service data memory cell operation;
The data forwarding unit links to each other with data storage cell, at least one interface adaptation unit respectively, be used for and described interface adaptation unit between carry out user data and transmit, and the user data that can't in time send sends to data storage cell and temporarily stores;
Data storage cell stores the software program of supporting the control unit operation, and is used to receive user data and storage from the data forwarding unit;
One or more interface adaptation unit provides described up-stream system side interface and described down-stream system side interface, is used to support the user data between data retransmission unit and described up-stream system side interface and the down-stream system side interface to transmit.
3, data forwarding device as claimed in claim 2 is characterized in that, described control unit is a central processing unit, and described data forwarding unit is a network processor chip.
4, as claim 1,2 or 3 described data forwarding devices, it is characterized in that, described data forwarding module is arranged among the GPRS service support node SGSN, described up-stream system is that the GPRS gateway service is supported node GGSN, and described down-stream system is the Access Network side apparatus; Or,
Described data forwarding module is arranged in the radio network controller (RNC), and described up-stream system is SGSN, and described down-stream system is base station node B.
5, data forwarding device as claimed in claim 4 is characterized in that, described Access Network side apparatus is Universal Terrestrial Radio Access Network UTRAN or base station sub-system BSS.
6, a kind of data forwarding method is characterized in that, this method may further comprise the steps:
A. the control system of the data forwarding module that comprises of data forwarding device receives user's request by transmitting parts, asks to generate at the data forwarding relation of user data and sends to this forwarding parts according to this user;
B. transmit parts according to from the interface annexation between its data forwarding interface of the data forwarding of control system relation and storage and up-stream system, the down-stream system, be identified for transmitting the down-stream system side interface and the up-stream system side interface of user data; And the follow-up user data that is received by this down-stream system side interface is forwarded by this up-stream system side interface and will be forwarded by this down-stream system side interface by the user data that this up-stream system side interface receives.
7, method as claimed in claim 6 is characterized in that, among the step a, control system specifically comprises by the method that described forwarding parts receive user's request:
The user sends user's request, and down-stream system sends to described forwarding parts with this user's request after receiving this user's request; These forwarding parts send to described control system with user's request of receiving.
8, method as claimed in claim 6 is characterized in that, among the step a, the method that described control system generates the data forwarding relation and sends to described forwarding parts specifically comprises:
Transfer of data priority and service bandwidth information that control system comprises according to described user's request, carry out Signalling exchange and generate the data forwarding relation by described forwarding parts and described up-stream system, again this data forwarding relation is sent to described forwarding parts and preserve according to the result of Signalling exchange; Or,
Control system directly generates the data forwarding relation according to transfer of data priority and the service bandwidth information that described user's request comprises, and this data forwarding relation is sent to described forwarding parts preservation.
9, method as claimed in claim 6 is characterized in that, among the step b, described forwarding parts are identified for transmitting the down-stream system side interface of user data and the method for up-stream system side interface is:
These forwarding parts read down-stream system sign and the up-stream system sign that comprises in the described data forwarding relation, and be identified at the down-stream system side interface of searching in the described interface annexation on these forwarding parts that link to each other with this down-stream system with up-stream system according to this down-stream system sign, also search the up-stream system side interface on these forwarding parts that link to each other with this up-stream system, and the down-stream system side interface that finds the most at last and up-stream system side interface are as the down-stream system side interface and the up-stream system side interface that are used to transmit described user data.
10, as each described method of claim 6 to 9, it is characterized in that described data forwarding device is arranged among the SGSN, described up-stream system is GGSN, and described down-stream system is the Access Network side apparatus.
11, method as claimed in claim 10 is characterized in that, among the step a, when described user request was the routing update request, the method that described control system generates the data forwarding relation and sends to described forwarding parts specifically comprised:
A1. described control system sends the component update request of transmitting by the forwarding parts that receive the routing update request to GGSN, this request comprises the user profile that sends routing update requesting users terminal, and the internet protocol IP of the forwarding parts address that receives described routing update request;
After a2.GGSN receives the request of described forwarding component update, upgrading current with the forwarding parts IP address that receives described routing update request is that described user terminal is transmitted forwarding of data parts IP address, and sends the response of forwarding component update by the forwarding parts that receive described routing update request to control system;
A3. after control system receives and transmits the component update response, concern, and this data forwarding is concerned that sending to these forwarding parts preserves for the forwarding parts that receive described routing update request generate data forwarding.
12, method as claimed in claim 11 is characterized in that, among the step a3, control system receives after the described forwarding component update response, generates before the described data forwarding relation, and this method further comprises:
Control system is according to the transfer of data priority and the service bandwidth information at described user data of preserving, carry out Signalling exchange by forwarding parts and the GGSN that receives described routing update request, be used for according to the Signalling exchange result for these forwarding parts generate described data forwarding relation.
13, method as claimed in claim 10 is characterized in that, among the step a, when described user's request was the routing update request, after described control system was received this routing update request, this method further comprised:
Control system to current be that described user terminal is transmitted the forwarding of data parts and sent the routing update indication, these forwarding parts receive and stop after this indication sending the user data relevant with this user terminal via self Access Network side interface, and this user terminal data that self GGSN side interface is received and the described user data that stops to send send to the forwarding parts that receive described routing update request.
14, as each described method of claim 6 to 9, it is characterized in that described data forwarding device is arranged among the RNC, described up-stream system is SGSN, and described down-stream system is Node B.
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| FI100080B (en) * | 1994-12-23 | 1997-09-15 | Nokia Telecommunications Oy | Arrangement for call forwarding in a mobile switching center |
| US6163835A (en) * | 1998-07-06 | 2000-12-19 | Motorola, Inc. | Method and apparatus for transferring data over a processor interface bus |
| CN1129280C (en) * | 2001-05-29 | 2003-11-26 | 华为技术有限公司 | Transmition method and device backing up node data package in general grouped radio service |
| CN100444572C (en) * | 2001-12-01 | 2008-12-17 | 中兴通讯股份有限公司 | Multi-processing unit route system |
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| CN107277087A (en) * | 2016-04-06 | 2017-10-20 | 阿里巴巴集团控股有限公司 | Data processing method and device |
| CN107277087B (en) * | 2016-04-06 | 2020-09-04 | 阿里巴巴集团控股有限公司 | Data processing method and device |
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