CN103906131A - Data transmission system, device and method - Google Patents
Data transmission system, device and method Download PDFInfo
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- CN103906131A CN103906131A CN201210572355.9A CN201210572355A CN103906131A CN 103906131 A CN103906131 A CN 103906131A CN 201210572355 A CN201210572355 A CN 201210572355A CN 103906131 A CN103906131 A CN 103906131A
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Abstract
The invention discloses a data transmission system, device and method, and relates to the technical field of communication. According to the invention, a control plane and a forwarding plane are processed separately, so the SGSN forwarding processing efficiency can be improved conveniently. The data transmission system of the invention comprises a SGSN forwarding plane device and a SGSN control plane device. Data interaction is performed between the SGSN forwarding plane device and the SGSN control device through a first interface. The SGSN forwarding plane device is provided with a second interface and a third interface. The second interface is used for the data interaction with a BSC. The third interface is used for the data interaction with a gateway device. First data is received by the SGSN forwarding plane device through the second interface. If the first data is control plane data, then the first data is sent to the SGSN control plane device; and if the first data is forwarding plane data, then the first data is sent to the gateway device according to forwarding configuration information. The embodiments of the invention are mainly used in a communication system in the data transmission process.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of data transmission system, Apparatus and method for.
Background technology
In network transmission process, by each network element device deploy protocol stack, make network element device use the agreement of appointing to cooperatively interact and transmit.Protocol stack refers to the summation of each layer protocol in Internet Transmission, the reflection of image the process of file transfer in network: transmit leg is encapsulated the information content to underlying protocol by upper-layer protocol, send to recipient, then from underlying protocol to upper-layer protocol, carried out decapsulation by recipient and obtain the information content wherein.
For example, agreement from top to bottom can comprise: Sub-Network Dependent Convergence Protocol (Sub Network Dependent Convergence Protocol, SNDCP) layer, logic link control (Logical Link Control, LLC) layer, base station general packet radio service agreement (BSS-GPRS Protocol, BSSGP; Wherein BSS Chinese is base station sub-system, and English full name is Base Station Subsystem; GPRS Chinese is general packet radio service, and English full name is General Packet Radio Service) layer, network service (Network Service, NS) layer etc.
In traditional 2G network, between base station controller (Base Station Controller, BSC) and Serving GPRS Support Node (Serving GPRS Support Node, SGSN), connect by Gb Interface.SGSN is receiving after the data of BSC transmission, need to be according to the requirement of Gb Interface protocol stack, data are carried out to the decapsulation post-processing information content from bottom to upper strata, if the information content need to be forwarded, also need to be from upper from forwarding Reseal again to bottom.Equally, when SGSN carries out downlink transfer after the data that receive Gateway GPRS Support Node (Gateway GPRS Support Node, GGSN) transmission, also need to do similar processing.
State in realization in the process of transfer of data, inventor finds that in prior art, at least there are the following problems: because SGSN carries out complete protocol stack processing to the data that receive, handling process complexity, causes data retransmission inefficiency, causes the bottleneck of SGSN disposal ability in 2G network.
Summary of the invention
Embodiments of the invention provide a kind of data transmission system, Apparatus and method for, by chain of command is separated with the processing of the face of forwarding, are convenient to improve the forward process efficiency of SGSN.
A first aspect of the present invention, provides a kind of data transmission system, comprising:
Service universal grouping wireless Serving GPRS Support Node SGSN chain of command equipment; And at least one SGSN forwards face equipment; Described SGSN forwards face equipment and described SGSN control appliance carries out data interaction by first interface; Described SGSN forwards face equipment and is provided with the second interface and the 3rd interface, and described the second interface is for carrying out data interaction with base station controller BSC, and described the 3rd interface is for carrying out data interaction with gateway device;
Described SGSN forwards face equipment for judging that the first data that receive by described the second interface are chain of command data or the face of forwarding data, if chain of command data, send described the first data to described SGSN chain of command equipment by described first interface, if the face of forwarding data, send described the first data to corresponding gateway device according to forwarding configuration information by described the 3rd interface;
Described SGSN chain of command equipment forwards face equipment for send the extremely described SGSN of described forwarding configuration information by described first interface, and described first data of sending by described first interface are carried out to the processing of chain of command.
In conjunction with a first aspect of the present invention, in a kind of possible implementation, described SGSN chain of command equipment is also provided with the 4th interface, and described the 4th interface is for carrying out chain of command data interaction with gateway device; Described the 3rd interface is for forwarding face data interaction with gateway device.
In conjunction with a first aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described SGSN forwards face equipment for sending described the first data to corresponding gateway device according to forwarding configuration information by described the 3rd interface, is specially:
Described SGSN forwards face equipment for sending described the first data to corresponding gateway device according to forwarding mapping relations table by described the 3rd interface, and wherein said forwarding mapping relations table is set up according to described forwarding configuration information.
In conjunction with a first aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
In conjunction with a first aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described SGSN forwards face equipment, also for receiving described SGSN chain of command equipment by described first interface or receiving by described the 3rd interface the second data that described gateway device issues, and according to described forwarding configuration information, described the second data are sent to corresponding BSC by described the second interface.
In conjunction with a first aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described system at least comprises that two described SGSN forward face equipment, described two described SGSN forward between face equipment and are provided with the 5th interface, and described the 5th interface forwards between face equipment and carries out data interaction for described two described SGSN;
Described SGSN forward face equipment also for, after receiving the 3rd data by described the second interface, described first interface or described the 3rd interface, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, send described the 3rd data by described the 5th interface and forward face equipment to described other described SGSN.
A second aspect of the present invention, provides a kind of service universal grouping wireless Serving GPRS Support Node SGSN to forward face equipment, comprising:
First interface, the second interface, the 3rd interface, processor and memory;
Described first interface, for carrying out data interaction with SGSN chain of command equipment;
Described the second interface, for carrying out data interaction with base station controller BSC;
Described the 3rd interface, for carrying out data interaction with gateway device;
Described memory, for storage forwarding configuration information, wherein said forwarding configuration information is that described SGSN chain of command equipment issues by described first interface;
Described processor, for judging that the first data that receive by described the second interface are chain of command data or the face of forwarding data, if chain of command data, send described the first data to described SGSN chain of command equipment by described first interface, if the face of forwarding data, send described the first data to corresponding gateway device according to described forwarding configuration information by described the 3rd interface.
In conjunction with a second aspect of the present invention, in a kind of possible implementation, described processor is for sending described the first data to corresponding gateway device according to described forwarding configuration information by described the 3rd interface, be specially: described processor is for sending described the first data to corresponding gateway device according to forwarding mapping relations table by described the 3rd interface, and wherein said forwarding mapping relations table is set up according to described forwarding configuration information;
Described memory, for storage forwarding configuration information, is specially: described memory is used for storing described forwarding mapping relations table.
In conjunction with a second aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
In conjunction with a second aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described processor, also for being sent to corresponding BSC by the second data that receive by described first interface or the 3rd interface by described the second interface according to described forwarding configuration information.
In conjunction with a second aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described SGSN forwards face equipment and also comprises the 5th interface, and described the 5th interface forwards between face equipment and carries out data interaction for two described SGSN;
Described processor, also for after receiving the 3rd data by described the second interface, described first interface or described the 3rd interface, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, send described the 3rd data by described the 5th interface and forward face equipment to described other described SGSN.
A third aspect of the present invention, provides a kind of service universal grouping wireless Serving GPRS Support Node SGSN chain of command equipment, comprising:
First interface and processor;
Described first interface, for carrying out data interaction with SGSN chain of command equipment;
Described processor, for sending described forwarding configuration information by described first interface to described SGSN forwarding face equipment, and carries out the processing of chain of command to the chain of command data of sending by described first interface.
In conjunction with a third aspect of the present invention, in a kind of possible implementation, also comprise the 4th interface, described the 4th interface is for carrying out chain of command data interaction with gateway device.
In conjunction with a third aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
A fourth aspect of the present invention provides a kind of data transmission method, comprising:
Service universal grouping wireless Serving GPRS Support Node SGSN forwards face equipment and receives the first data that base station controller BSC sends;
If described the first data are chain of command data, described SGSN forwards face equipment described the first data is sent to SGSN chain of command equipment;
If described the first data are forwarding face data, described SGSN forwards face equipment, according to forwarding configuration information, described the first data is sent to corresponding gateway device; Wherein said forwarding configuration information is issued by described SGSN chain of command equipment.
In conjunction with a fourth aspect of the present invention, in the first implementation, described SGSN forwards face equipment and sets up and forward mapping relations table according to described forwarding configuration information;
Described SGSN forwards face equipment, according to forwarding configuration information, described forwarding face data is sent to corresponding gateway device, comprising: described SGSN forwarding face equipment is sent to described forwarding face data according to described forwarding mapping relations table the gateway device of described correspondence.
In conjunction with a fourth aspect of the present invention and above-mentioned possible implementation, in the possible implementation of another kind, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
In conjunction with a fourth aspect of the present invention and above-mentioned implementation, in another kind of implementation, the method also comprises:
Described SGSN forwards face equipment and receives the second data that described SGSN chain of command equipment or described gateway device issue, and according to described forwarding mapping relations table, described the second data is sent to corresponding BSC.
In conjunction with a fourth aspect of the present invention and above-mentioned implementation, in another kind of implementation, described SGSN chain of command equipment is to there being at least two described SGSN to forward face equipment; After described SGSN forwarding face equipment receives the 3rd data of described BSC, described SGSN chain of command equipment or gateway device transmission, described method also comprises:
Described SGSN forwards face equipment and determines that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, sends described the 3rd data and forwards face equipment to described other described SGSN.
A fifth aspect of the present invention provides a kind of data transmission method, comprising:
SGSN chain of command equipment is that described SGSN forwards the forwarding configuration information of face devices allocation for data retransmission;
Described SGSN chain of command equipment is sent to described SGSN by described forwarding configuration information and forwards face equipment.
In conjunction with a fifth aspect of the present invention, in one implementation, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
A sixth aspect of the present invention, also provides a kind of SGSN to forward face equipment, comprising:
Receiving element, the first data that send for receiving base station controller BSC;
Control transmitting element, in the time that described the first data are chain of command data, described the first data are sent to SGSN chain of command equipment;
Forwarded upstream unit, in the time that described the first data are forwarding face data, is sent to corresponding gateway device according to forwarding configuration information by described the first data; Wherein said forwarding configuration information issues configuration by described SGSN chain of command equipment.
In conjunction with a sixth aspect of the present invention, this SGSN forwarding face equipment also comprises in one implementation:
Set up unit, for after described the first data are sent to SGSN chain of command equipment by described the first transmitting element, set up described forwarding mapping relations table according to described forwarding configuration information;
Wherein, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
In conjunction with a sixth aspect of the present invention and above-mentioned implementation, in another kind of implementation, this SGSN forwards face equipment and also comprises:
Down forward unit, the second data that issue for receiving described SGSN chain of command equipment or described gateway device, and according to described forwarding mapping relations table, described the second data are sent to corresponding BSC.
In conjunction with a sixth aspect of the present invention and above-mentioned implementation, in another kind of implementation, described SGSN chain of command equipment is to there being at least two described SGSN to forward face equipment; Described SGSN forwards face equipment and also comprises:
Query unit, for receive the 3rd data of described BSC transmission at described receiving element after, with down forward after unit receives the 3rd data that described SGSN chain of command equipment or gateway device issue described, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, send described the 3rd data and forward face equipment to described other described SGSN;
Parallel retransmission unit, be used in the time that described query unit determines that described transmission interface place equipment is not described SGSN forwarding face equipment, described the 3rd data are sent to other SGSN and forward face equipment, so that described other SGSN forward face equipment, described the 3rd data are sent to described gateway device or described BSC.
A seventh aspect of the present invention provides a kind of SGSN chain of command equipment, comprising:
Dispensing unit, is used to described SGSN to forward the forwarding configuration information of face devices allocation for data retransmission mapping;
The first transmitting element, is sent to described SGSN for the forwarding configuration information that described dispensing unit is distributed and forwards face equipment, sets up and forwards mapping relations table according to described forwarding configuration information so that described SGSN forwards face equipment.
In conjunction with a seventh aspect of the present invention, in one implementation, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
A eighth aspect of the present invention, provides a kind of SGSN, comprising: SGSN chain of command equipment and at least one SGSN forward face equipment;
Described SGSN forwards face equipment, the first data that send for receiving base station controller BSC; If described the first data are chain of command data, described chain of command data are sent to SGSN chain of command equipment; If described the first data are forwarding face data, according to forwarding configuration information, described forwarding face data are sent to gateway device; Wherein said forwarding configuration information issues configuration by described SGSN chain of command equipment;
Described SGSN chain of command equipment, forwards for receiving SGSN the first data that face equipment sends; Be that described SGSN forwards the forwarding configuration information of face devices allocation for data retransmission mapping according to described the first data configuration; Described forwarding configuration information is sent to described SGSN and forwards face equipment, set up and forward mapping relations table according to described forwarding configuration information so that described SGSN forwards face equipment.
Data transmission system, Apparatus and method for that the embodiment of the present invention provides, by SGSN forward face equipment by chain of command data retransmission to SGSN chain of command device processes, forwarding face data are transmitted to gateway device according to forwarding mapping relations table, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and improved the forward process efficiency of SGSN forwarding face data.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of data transmission system composition schematic diagram in the embodiment of the present invention 1;
Fig. 2 is the another kind of data transmission system composition schematic diagram in the embodiment of the present invention 1;
Fig. 3 is a kind of data transmission method flow chart in the embodiment of the present invention 2;
Fig. 4 is the another kind of data transmission method flow chart in the embodiment of the present invention 2;
Fig. 5 is a kind of uplink data transmission method flow chart in the embodiment of the present invention 3;
Fig. 6 is a kind of downlink data transmission method flow chart in the embodiment of the present invention 3;
Fig. 7 is that the one forwarding configuration information in the embodiment of the present invention 3 issues flow chart;
Fig. 8 is that the another kind forwarding configuration information in the embodiment of the present invention 3 issues flow chart;
Fig. 9 is that the another kind forwarding configuration information in the embodiment of the present invention 3 issues flow chart;
Figure 10 is that the another kind forwarding configuration information in the embodiment of the present invention 3 issues flow chart;
Figure 11 is that a kind of SGSN in the embodiment of the present invention 4 forwards face equipment composition schematic diagram;
Figure 12 is a kind of SGSN chain of command equipment composition schematic diagram in the embodiment of the present invention 5;
Figure 13 is that a kind of SGSN in the embodiment of the present invention 6 forwards face equipment composition schematic diagram;
Figure 14 is a kind of SGSN chain of command equipment composition schematic diagram in the embodiment of the present invention 7;
Figure 15 is a kind of SGSN composition schematic diagram in the embodiment of the present invention 8.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The techniques described herein may be used in various communication systems, for example current 2G, 3G communication system and next generation communication system, for example global system for mobile communications (GSM, Global System for Mobile communications), code division multiple access (CDMA, Code Division Multiple Access) system, time division multiple access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), frequency division multiple access (FDMA, Frequency Division Multiple Addressing) system, OFDM (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier Frequency Division Multiple Access (SC-FDMA) system, GPRS (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system, and other these type of communication systems.
In conjunction with subscriber equipment and/or base station and/or base station controller, various aspects are described herein.
Subscriber equipment, can be that wireless terminal can be also catv terminal, wireless terminal can be to point to user to provide the equipment of voice and/or data connectivity, has the portable equipment of wireless connecting function or is connected to other treatment facilities of radio modem.Wireless terminal can be through wireless access network (for example, RAN, Radio Access Network) communicate with one or more core net, wireless terminal can be mobile terminal, as mobile phone (or being called " honeycomb " phone) with there is the computer of mobile terminal, for example, can be portable, pocket, hand-hold type, mobile device built-in computer or vehicle-mounted, they and wireless access network exchange language and/or data.For example, Personal Communications Services (PCS, Personal Communication Service) phone, cordless telephone, Session Initiation Protocol phone, wireless local loop (WLL, Wireless Local Loop) stand, the equipment such as personal digital assistant (PDA, Personal Digital Assistant).Wireless terminal also can be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile radio station (Mobile Station), travelling carriage (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), subscriber equipment (User Device) or subscriber's installation (User Equipment).
Base station (for example, access point) can refer in Access Network aloft on interface by the equipment of one or more sectors and wireless terminal communications.Base station can be used for the air frame of receiving and IP grouping mutually to change, and as the router between wireless terminal and the remainder of Access Network, wherein the remainder of Access Network can comprise Internet protocol (IP) network.Base station is the attribute management of tunable to air interface also.For example, base station can be the base station (BTS in GSM or CDMA, Base Transceiver Station), also can be the base station (NodeB) in WCDMA, can also be evolved base station (NodeB or eNB or the e-NodeB in LTE, evolutional Node B), the application does not limit.
Base station controller, can be the base station controller (BSC, base station controller) in GSM or CDMA, can be also the radio network controller (RNC, Radio Network Controller) in WCDMA, and the application does not limit.
In addition, term " system " and " network " are often used interchangeably in this article herein.Term "and/or" herein, is only a kind of incidence relation of describing affiliated partner, and expression can exist three kinds of relations, and for example, A and/or B, can represent: individualism A exists A and B, these three kinds of situations of individualism B simultaneously.In addition, character "/" herein, generally represents that forward-backward correlation is to liking a kind of relation of "or".
Embodiment 1
The embodiment of the present invention provides a kind of data transmission system, as shown in Figure 1, comprising: at least one SGSN forwards face equipment 11; And, SGSN chain of command equipment 12.Described SGSN forwards face equipment 11 and carries out data interaction with described SGSN control appliance 12 by first interface; Described SGSN forwards face equipment 11 and is provided with the second interface and the 3rd interface, and described the second interface is for carrying out data interaction with base station controller BSC, and described the 3rd interface is for carrying out data interaction with gateway device;
Described SGSN forwards face equipment 11, for judging that the first data that receive by described the second interface are chain of command data or the face of forwarding data, if chain of command data, send described the first data to described SGSN chain of command equipment by described first interface, 1, if the face of forwarding data, send described the first data to corresponding gateway device according to forwarding configuration information by described the 3rd interface.
Wherein, BSC and SGSN forward between face equipment and are connected by first interface, and the data type of the first data that BSC sends comprises chain of command data and the face of forwarding data.Chain of command data are the data that only need to forward face protocol processes, in mainly comprise control signal, also comprise the business datum that needs chain of command protocol processes.In forwarding face data, refer to and only need forwarding face to process the data that just can realize forwarding, mainly comprise business datum content, also comprise and only need forwarding face to process the control signal that just can complete forwarding.Chain of command processing is the processing that need to utilize upper-layer protocol to resolve and encapsulate, and forwarding face processing is the processing that only only needs lower layer protocol to resolve and encapsulate.In the underlying protocol of data, comprise and can identify the protocol-identifier that these data are forwarding face data or chain of command data, SGSN forward face equipment can be from underlying protocol such as IP layer or NS layer etc., thereby obtain this protocol-identifier specified data type.
Wherein, in order to obtain the control signal comprising in chain of command data, need to carry out the decapsulation from lower layer protocol to upper-layer protocol to chain of command data, to obtain naked control signal and to carry out corresponding control operation.In actual applications, due to chain of command, with the face of forwarding there is very big difference in processing, chain of command need to carry out business logic processing, and forwarding face only needs the inquiry and the Reseal that carry out packet to send, by method of the present invention, untie the coupling processing of chain of command and the face of forwarding in prior art, made the data that processing mode is different can be no longer with adopting same tupe, thereby promoted forward efficiency.
Concrete, inquire about described forwarding mapping relations table according to the forwarding identification information carrying in described forwarding face data, determine the transmission interface place equipment that described forwarding face data are corresponding; Forward face equipment if described transmission interface place equipment is not described SGSN, described forwarding face data are sent to other SGSN and forward face equipment, so that described other SGSN forward face equipment, described forwarding face data are sent to described gateway device or described BSC; Forward face equipment if described transmission interface place equipment is described SGSN, described forwarding face data are sent to gateway device.Being understandable that, is the 3rd interface for transmission interface described in upstream data, is first interface for transmission interface described in downlink data.
Wherein, described the second interface can be Gb Interface, and described the 3rd interface can be Gn-U interface, and described first interface SGSN chain of command equipment and SGSN forward the general name of multiple interfaces between face equipment.Described physically first interface can be an interface, and logically described first interface can be 2 interfaces, realizes with different protocol stacks, and one is used for issuing forwarding configuration information, and another is used for carrying out the forwarding of data.
Wherein, the business datum content forwarding in face data need to not processed on SGSN, but need to be forwarded in gateway device by SGSN.Therefore, SGSN forwards face node and only understands the underlying protocol of forwarding face data and just can obtain the forwarding identification information of these data, and the forwarding mapping relations table that inquiry has established obtains sending the identification information of these data, carries out being transmitted to gateway device after bottom encapsulation.Described gateway device can be GGSN or SGW (Signaling GateWay, SGW).Certainly, SGSN forwards face node to carry out needing first to set up before data retransmission and forwards mapping relations table, and this forwarding mapping relations table can initiate link setup at BSC, restart or indicate SGSN chain of command equipment to issue configuration by control signal when activation process.
In the present embodiment, described SGSN chain of command equipment 12, for sending described forwarding configuration information by described first interface to described SGSN forwarding face equipment 11, and carries out the processing of chain of command to described first data of sending by described first interface.
Described SGSN forwards face equipment 11, the forwarding configuration information also sending for receiving described SGSN chain of command equipment 12, and set up described forwarding mapping relations table according to described forwarding configuration information.
Further, described SGSN chain of command equipment 12 is also provided with the 4th interface, and described the 4th interface is for carrying out chain of command data interaction with gateway device; Described the 3rd interface is for forwarding face data interaction with gateway device.
Wherein, described SGSN forwards face equipment 11 for sending described the first data to corresponding gateway device according to forwarding configuration information by described the 3rd interface, be specially: described SGSN forwards face equipment 12 for sending described the first data to corresponding gateway device according to forwarding mapping relations table by described the 3rd interface, and wherein said forwarding mapping relations table is set up according to described forwarding configuration information.
Wherein, described SGSN forwards face equipment and is connected with BSC by the second interface, and SGSN forwards face equipment and receives data by the second interface from BSC, or sends data to BSC.Described SGSN forwards face equipment and is connected with gateway device by the 3rd interface, and described SGSN forwards face equipment and sent forwarding face data or receive the forwarding face data that gateway device issues to gateway device by the 3rd interface.Described SGSN chain of command equipment is connected with gateway device by Gn-C interface, and described SGSN chain of command equipment is sent chain of command data or receives the chain of command data that gateway device issues to gateway device by the 4th interface.Forward between face equipment and SGSN chain of command equipment at SGSN, can connect by first, the present invention does not limit the physical interface form between SGSN forwarding face equipment and SGSN chain of command equipment.
Further, described SGSN forwards face equipment, also for receiving described SGSN chain of command equipment by described first interface or receiving by described the 3rd interface the second data that described gateway device issues, and according to described forwarding configuration information, described the second data are sent to corresponding BSC by described the second interface.
Wherein, described the second data can be forwarding face data.What deserves to be explained is, described SGSN forwards face equipment 11, can be the equipment with the forwarding surface function of existing SGSN.Described SGSN chain of command equipment 12 can be the equipment with the chain of command processing capacity of existing SGSN.Described forwarding face data can comprise business datum, are also referred to as user face data.Described chain of command data can comprise the control signal of controlling or configuring to gateway or to BSC.
Further, described forwarding configuration information comprises: Network virtual link (Network Service Virtual Connection, NSVC) NSVC generating in link setup flow process transmits, base station sub-system GPRS virtual link (BSSGP Virtual Connection, BVC) restart or community report flow in BVC mark (the BVC Identity that generates, BVCI) transmit, and/or packet data protocol (Packet Data Protocol, relevant convergence protocol (the SubNetwork Dependent Convergence Protocol-user plane of subnet of the forwarding face PDP) generating in activation process or deexcitation flow process, SNDCP-U) transmit.SGSN chain of command equipment can restart at NSVC link setup flow process, BVC the configuration information that flow process, PDP activation process and PDP deexcitation flow process issue respectively, in specifically can reference example 3, the configuration information of Fig. 7-Figure 10 issues flow process, and the embodiment of the present invention is not introduced here in detail.
Further, described SGSN forwards face equipment 11, also for receiving described SGSN chain of command equipment 12 or receiving by described the 3rd interface the forwarding face data that described gateway device issues, and according to described forwarding mapping relations table, described forwarding face data are sent to described BSC by described the second interface.
Further, as shown in Figure 2, further, described system at least comprises that two described SGSN forward face equipment 11, described two described SGSN forward between face equipment 12 and are provided with the 5th interface, and described the 5th interface forwards between face equipment 11 and carries out data interaction for described two described SGSN;
Described SGSN forward face equipment 11 also for, after receiving the 3rd data by described the second interface, described first interface or described the 3rd interface, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment 11, send described the 3rd data by described the 5th interface and forward face equipment 11 to described other described SGSN.
Wherein, described the 3rd data can be forwarding face data.When described SGSN forwarding face equipment 11 receives the 3rd data of described BSC transmission by the second interface after, with after the 3rd data that receive described SGSN chain of command equipment 12 or issue by the 3rd interface reception gateway device, SGSN forwards face equipment 11 can also inquire about described forwarding mapping relations table according to the forwarding identification information carrying in described forwarding face data, determines the transmission interface place equipment that described forwarding face data are corresponding.
It should be noted that, the data transmission system that the embodiment of the present invention provides can form with the network element of realizing SGSN chain of command function by realizing respectively SGSN forwarding surface function, also can form with the module that realizes SGSN chain of command function by realizing SGSN forwarding surface function in SGSN inside.In the embodiment of the present invention, SGSN forwards the specific implementation of face equipment and SGSN chain of command equipment and the associated description corresponding content in can reference example 2-7.
The data transmission system that the embodiment of the present invention provides, forwarding face equipment 11 by SGSN processes chain of command data retransmission to SGSN chain of command equipment 12, forwarding face data are transmitted to gateway device according to forwarding configuration information, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and improved the forward process efficiency of SGSN forwarding face data.
Embodiment 2
The embodiment of the present invention provides a kind of data transmission method, and as shown in Figure 3, the method can comprise:
301, SGSN forwards face equipment and receives the first data that base station controller BSC sends.
Wherein, BSC and SGSN forward between face equipment and are connected by the second interface, and the data type of the first data that BSC sends comprises chain of command data and the face of forwarding data.In chain of command data, mainly comprise control signal, forward in face data and mainly comprise business datum content.In the underlying protocol of data, comprise and can identify the protocol-identifier that these data are forwarding face data or chain of command data, SGSN forward face equipment can be from underlying protocol such as IP layer or NS layer etc., thereby obtain this protocol-identifier specified data type.
If 302 described the first data are chain of command data, SGSN forwards face equipment described the first data is sent to SGSN chain of command equipment.
Wherein, in order to obtain the control signal comprising in chain of command data, need to carry out the decapsulation from lower layer protocol to upper-layer protocol to chain of command data, to obtain naked control signal and to carry out corresponding control operation.In actual applications, due to chain of command, with the face of forwarding there is very big difference in processing, chain of command need to carry out business logic processing, and forwarding face only needs the inquiry and the Reseal that carry out packet to send, by method of the present invention, untie the coupling processing of chain of command and the face of forwarding in prior art, made the data that processing mode is different can be no longer with adopting same tupe, thereby promoted forward efficiency.
If 303 described the first data are forwarding face data, SGSN forwards face equipment, according to forwarding configuration information, described the first data is sent to gateway device; In wherein said forwarding configuration information, comprise and forward the required map information of described forwarding face data, described forwarding configuration information issues configuration by described SGSN chain of command equipment.
Concrete, inquire about described forwarding mapping relations table according to the forwarding identification information carrying in described forwarding face data, determine the transmission interface place equipment that described forwarding face data are corresponding; Forward face equipment if described transmission interface place equipment is not described SGSN, described forwarding face data are sent to other SGSN and forward face equipment, so that described other SGSN forward face equipment, described forwarding face data are sent to described gateway device or described BSC; Forward face equipment if described transmission interface place equipment is described SGSN, described forwarding face data are sent to gateway device.Be understandable that, described the 3rd interface can be Gn-U interface, and described the second interface can be Gb Interface.
Wherein, the business datum content forwarding in face data need to not processed on SGSN, but need to be forwarded in gateway device by SGSN.Therefore, SGSN forwards face node and only understands the underlying protocol of forwarding face data and just can obtain the forwarding identification information of these data, and the forwarding mapping relations table that inquiry has established obtains sending the identification information of these data, carries out being transmitted to gateway device after bottom encapsulation.Described gateway device can be GGSN or SGW (Signaling GateWay, SGW).
Certainly, SGSN forwards face node to carry out needing first to set up before data retransmission and forwards mapping relations table, and this forwarding mapping relations table can initiate link setup at BSC, restart or indicate SGSN chain of command equipment to issue configuration by control signal when activation process.
The embodiment of the present invention also provides a kind of data transmission method, and as shown in Figure 4, the method can comprise:
401, SGSN chain of command equipment receives SGSN and forwards the first data that face equipment sends.
402, SGSN chain of command equipment is that described SGSN forwards the forwarding configuration information of face devices allocation for data retransmission mapping according to described the first data.
Wherein, forwarding configuration information comprises: Network virtual link (Network Service Virtual Connection, NSVC) NSVC generating in link setup flow process transmits, base station sub-system GPRS virtual link (BSSGP Virtual Connection, BVC) restart or community report flow in BVC mark (the BVC Identity that generates, BVCI) transmit, and/or packet data protocol (Packet Data Protocol, relevant convergence protocol (the SubNetwork Dependent Convergence Protocol-user plane of subnet of the forwarding face PDP) generating in activation process or deexcitation flow process, SNDCP-U) transmit.Forward mapping relations tables and can be one or more table in transmitting that configuration information comprises, also can be the table regenerating of transmitting comprising according to forwarding configuration information, the main body that generates forwarding mapping relations table can be that SGSN forwards face equipment, can be also SGSN chain of command equipment.
403, SGSN chain of command equipment is sent to described SGSN by described forwarding configuration information and forwards face equipment.
Wherein, described SGSN forwards face equipment and can set up forwarding mapping relations table according to described forwarding configuration information.Described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
It should be noted that, the particular content in this method embodiment can reference example 1 and embodiment 3-embodiment 7 in corresponding content, this method embodiment is no longer described in detail.
The data transmission method that the embodiment of the present invention provides, by SGSN forward face equipment by chain of command data retransmission to SGSN chain of command device processes, forwarding face data are transmitted to gateway device according to forwarding mapping relations table, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and improved the forward process efficiency of SGSN forwarding face data.
Embodiment 3
The embodiment of the present invention provides a kind of data transmission method, and wherein as shown in Figure 5, the method comprises the transmitting procedure of upstream data:
501, BSC forwards face equipment 1 by the second interface to SGSN and sends the first data.
502, SGSN forwards the type of face equipment 1 definite described the first data; If described the first data are chain of command data, perform step 503; If described the first data are forwarding face data, perform step 507.
Wherein, forwarding face equipment can be according to the protocol-identifier carrying in the underlying protocol of the first data, determine that the first data are forwarding face data or chain of command data, on the face of forwarding equipment, do not dispose higher-layer protocols and do not process high-level signaling, therefore chain of command data can be sent to the chain of command device processes that is deployed with complete protocol stack.
503, SGSN forwards face equipment 1 the first data is sent to SGSN chain of command equipment.
Wherein, just preset chain of command equipment corresponding to this forwarding face equipment in the time forwarding face device power, and set up and have forwarding channel forwarding between face equipment and chain of command equipment.Similarly, forward also pre-configured annexation between face equipment.
504, SGSN chain of command equipment is the forwarding configuration information that 1 point of described SGSN forwarding face equipment is used in data retransmission mapping according to described chain of command data.
Wherein, chain of command equipment is understood the identification information carrying in chain of command data to upper-layer protocol by bottom, obtain mapping relations, TLLI (Temporary Logical Link Identifier between mapping relations, BVCI and the community ID between mapping relations, BCVI and the NSVC between these chain of command data indicated IP five-tuple and NSVC, TLLI) mapping relations and between Network Service Access point mark (Network Service Access Point Identifier, NSAPI) and BVCI etc.The mapping relations that get are generated and forward configuration information, be handed down to forwarding face equipment, forward so the follow-up business datum that receives of face equipment and just can simply understand underlying protocol and obtain forwarding identification information, forward according to these mapping relations.
505, SGSN chain of command equipment is sent to described SGSN by forwarding configuration information and forwards face equipment 1.
Wherein, in order to allow, forwarding face equipment can accurately be realized between receiving port and transmit port, mapping between receiver and transmission link, on the face of forwarding equipment, need the mapping relations between the each layer protocol of the forwarding face that disposes, accurately encapsulation of data sends.Therefore, described forwarding configuration information can comprise: NSVC transmits, BVCI transmits and/or SNDCP-U transmits etc.
Concrete, due to the operation flow difference that BSC initiates to SGSN, SGSN chain of command equipment is the also difference of configuration information that BSC issues.Below restarting flow process, PDP activation process and PDP deexcitation flow process take NSVC link setup flow process, BVC respectively describes as the configuration information that example issues SGSN chain of command equipment.Certainly, BSC or GGSN can also forward face equipment to SGSN and send other chain of command data, make SGSN chain of command equipment do corresponding signaling processing, and the embodiment of the present invention is given an example no longer one by one.
1) power on backward SGSN of BSC forwards face equipment and initiates community network service (Social Networking Services, SNS) link setup request message (SNS-SIZE).SGSN forwards face equipment and determines that this class message is NS layer message, belongs to chain of command data, and SNS link setup request message is transmitted to corresponding SGSN chain of command equipment.SGSN chain of command equipment receives after SNS link setup request message, forwards face equipment reply SNS link setup acknowledge message (SNS-SIZE-ACK) to BSC by SGSN.
2) between BSC and SGSN chain of command equipment, continue the information (SNS-GONFIG) such as form interactive terminal access parameter and network configuration parameters with NS layer chain of command data, SGSN chain of command equipment obtains the mapping relations between NSVC link ID and IP five-tuple, generates NSVC and transmits.
3) SGSN chain of command equipment is transmitted NSVC at NS layer and is handed down to SGSN forwarding face equipment.
4) SGSN transmits according to NSVC, sets up the forwarding mapping relations table between NSVC link ID and IP five-tuple.Wherein IP five-tuple comprises local terminal IP, opposite end IP, local terminal port, Peer-Port and IP address class type information.
1) restart after reporting behind indivedual communities community, BSC forwards face equipment transmission BVC to SGSN and restarts Indication message (BVC-RESET IND), SGSN forwards face equipment and determines that this class message belongs to chain of command data, BVC is restarted to Indication message and be transmitted to corresponding SGSN chain of command equipment.
2) SGSN chain of command device replied BVC restart ack message (BVC-RESET RES), restarts the corresponding relation between BVCI and community ID and the NSVC that obtains community Indication message from BVC, generates BVCI and transmits.
3) SGSN chain of command equipment is transmitted BVCI at BSSGP layer and is handed down to SGSN forwarding face equipment.
4) SGSN forwards face equipment and sets up the forwarding mapping relations table between BVCI and community ID and the NSVC of community.
1) initiate after PDP activation process at MS, BSC forwards face equipment to SGSN and sends PDP activation request message (PDP Activate), carries respectively NSVC ID, BVCI, TLLI and the NASAPI of this MS at NS layer, BSSGP layer, LLC layer and NAS layer.SGSN forward face equipment equally by this chain of command data retransmission to SGSN chain of command equipment.
2) SGSN chain of command equipment completes session management and creates PDP Context, sets up gn interface PDP Context, and with GGSN mutual (this process and original indifference, do not describe in detail).
3) SGSN chain of command equipment will forward face equipment to SGSN and issue SNDCP-U and transmit, and carry the information such as RA/TLLI+NSAPI, TEID-U (gn interface Tunnel Identifier), BVCI/CELLID.
4) SGSN forwarding face equipment is set up the forwarding mapping relations table of TEID-U and RA/TLLI+NSAPI and BVCI.
5), in order retrieving conveniently, can to forward and on face equipment, set up a RA/TLLI and the SNDCP-U index relative between transmitting at SGSN.The SGSN forwarding face node that SGSN chain of command node belongs to the NSVC link of this community, MS place issues BVCI and transmits updating message, the forwarding face node and the SNDCP-U that carry BVCI, RAI+TLLI, SNDCP-U place transmit ID, notice SGSN forwards face renewal of the equipment BVCI and transmits, and sets up the index relative that RA/TLLI and SNDCP-U transmit.
1) in the time that MS initiates PDP deexcitation flow process deletion PDP user plane bearer, BSC forwards face equipment to SGSN and sends PDP deexcitation request message (PDP Deactivate), carries respectively NSVC ID, BVCI, TLLI and the NASAPI of this MS at NS layer, BSSGP layer, LLC layer and NAS layer.SGSN forward face equipment equally by this chain of command data retransmission to SGSN chain of command equipment.
2) SGSN chain of command equipment completes the PDP deletion processing of this MS, forwards face equipment send deletion SNDCP message (Del SNDCP-U) to this MS place SGSN.
3) SGSN forwards the SNDCP-U that this MS of face unit deletion is corresponding and forwards mapping relations table.
4) the SGSN forwarding face node that SGSN chain of command node belongs to the NSVC link of this community, MS place issues BVCI and transmits updating message, the forwarding face node and the SNDCP-U that carry BVCI, RAI+TLLI, SNDCP-U place transmit ID, notice SGSN forwards face renewal of the equipment BVCI and transmits, and deletes the index relative that RA/TLLI and SNDCP-U transmit.
506, SGSN forwards face equipment 1 and sets up forwarding mapping relations table according to described forwarding configuration information.
Wherein, forward the mapping relations, TLLI and the NSAPI that in mapping relations tables, comprise between mapping relations, BVCI and the community ID between mapping relations, BCVI and the NSVC between IP five-tuple and NSVC and the mapping relations between BVCI.
507, SGSN forwards face equipment 1 and forwards mapping relations table according to the forwarding identification information inquiry of carrying in the first data, determines the transmission interface place equipment that described the first data are corresponding; Forward face equipment 1 if described transmission interface place equipment is described SGSN, perform step 508; Forward face equipment 2 if described transmission interface place equipment is SGSN, perform step 509.
Wherein, data transmission system at least comprises that two described SGSN forward face equipment.In the process forwarding at upstream data, the IP five-tuple, NSVC, BVC and the RA/TLLI inquiry that in the face of forwarding data lower layer protocol, are resolved to successively this packet forward mapping relations table, determine that the SGSN at the transmission interface place of these forwarding face data forwards point device.
508, SGSN forwards face equipment 1 these forwarding face data is sent to GGSN.
Wherein, forward face equipment 1 if the transmission interface place equipment of described forwarding face data is described SGSN, according to NASAPI, inquiry forwards mapping relations table, obtains gn interface GTPU information, after encapsulation gn interface Tunnel Identifier, IP address and MAC information, sends to GGSN.Described SGSN forwards between face equipment 1 and GGSN and is connected with the 3rd interface, and the 3rd interface forwards face equipment 1 for SGSN and forwards face data interaction with gateway device.In addition, for downlink transfer, SGSN forwards face equipment 1 and can also be received described SGSN chain of command equipment or be received by described the 3rd interface the second data that described gateway device issues by described first interface, and according to described forwarding configuration information, described the second data is sent to corresponding BSC by described the second interface.
509, SGSN forwards face equipment 1 these forwarding face data is sent to SGSN forwarding face equipment 2.
Wherein, system at least comprises that two described SGSN forward face equipment, and described two described SGSN forward between face equipment and are provided with the 5th interface, and described the 5th interface forwards between face equipment and carries out data interaction for described two described SGSN.If not being SGSN, the transmission interface place equipment of described forwarding face data forwards face equipment 1, the transmission interface place equipment that finds these forwarding face data in forwarding mapping relations table is that SGSN forwards face equipment 2, sends to SGSN to forward face equipment 2 these forwarding face data by the data forwarding channel forwarding between face equipment.
510, SGSN forwards face equipment 2 these forwarding face data is sent to GGSN.
Wherein, SGSN forwards face equipment 2 and obtains Gn GTPU information according to RA/TLLI and NASAPI inquiry forwarding mapping relations table, after encapsulation gn interface Tunnel Identifier, IP address and MAC information, sends to GGSN.Similar with SGSN forwarding face equipment 1, described SGSN forwards between face equipment 2 and GGSN and is also connected with and interface like the 3rd interface class, forwards face equipment 2 forward face data interaction with gateway device for SGSN.
In the present embodiment, more than described the uplink process of data, similarly GGSN also can forward face equipment by SGSN and send downlink data, and as shown in Figure 6, concrete downlink data transmission method is as follows:
511, SGSN forwards face equipment 1 and receives the second data that GGSN sends.
For downlink data, SGSN forwards face equipment 1 can receive described SGSN chain of command equipment by described first interface, or SGSN forwarding face equipment 1 also can receive the second data that described gateway device issues by described the 3rd interface.
512, SGSN forwards face equipment 1 and forwards mapping relations table according to the forwarding identification information inquiry of carrying in the second data, determines the transmission interface place equipment that described forwarding face data are corresponding; Forward face equipment 1 if described transmission interface place equipment is described SGSN, perform step 513; Forward face equipment 2 if described transmission interface place equipment is SGSN, perform step 514.
Wherein, system at least comprises that two described SGSN forward face equipment, and two described SGSN forward between face equipment and are provided with the 5th interface, and SGSN forwards between face equipment can carry out data interaction by the 5th interface.It is reverse that downlink data forwards with the mode of upstream data forwarding inquiries forwarding mapping relations table, and according to gn interface Tunnel Identifier, inquiry forwards mapping relations table and obtains TLLI and NASAPI, confirms that the transmission interface place SGSN of these forwarding face data forwards face equipment.
513, SGSN forwards face equipment 1 the second data is sent to BSC.
Wherein, if the transmission interface of these forwarding face data forwards on face equipment 1 at SGSN, identification information encapsulation SNDCP layer, LLC layer, BSSGP layer, NS layer and the IP layers such as NASAPI, TLLI, BVCI, NSVC link ID and the IP five-tuple obtaining according to gn interface Tunnel Identifier inquiry forwarding mapping relations table, send to BSC.
514, SGSN forwards face equipment 1 the second data is sent to SGSN forwarding face equipment 2.
Wherein, if the transmission interface of these forwarding face data does not forward on face equipment 1 at SGSN, NASAPI, the TLLI obtaining according to gn interface Tunnel Identifier inquiry forwarding mapping relations table and BVCI encapsulate SNDCP layer, LLC layer and the BSSGP layer of these forwarding face data, send to SGSN to forward face equipment 2.Concrete, SGSN forwards face equipment 1 after receiving the 3rd data by described the second interface, described first interface or described the 3rd interface, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, send described the 3rd data by described the 5th interface and forward face equipment to described other described SGSN.
515, SGSN forwards face equipment 2 these forwarding face data is sent to BSC.
Wherein, similar with SGSN forwarding face equipment 1, SGSN forwards between face equipment 2 and BSC and is also connected with and interface like the second interface class, forwards the data interaction between face equipment 2 and BSC for SGSN.SGSN forwards face equipment 2 and forwards mapping relations table according to the cell information inquiry NSVC carrying in the BSSGP layer of the forwarding face data that receive, and obtains NCVC link ID and IP five-tuple, after encapsulation NS layer and IP layer, sends to BSC.
In practical application, SGSN forwards face equipment 1 and SGSN forwarding face equipment 2 can carry out the business division of labor, forwards face equipment 1 be responsible for link layer traffic by SGSN, forwards face equipment 2 be responsible for bearing bed business by SGSN; Or, forward face equipment 1 by SGSN and be responsible for the business of part community, forwarded the business of face equipment 2 responsible other communities etc. by SGSN.
In a kind of application scenarios of the present embodiment, above-mentioned SGSN chain of command equipment, SGSN forward face equipment 1 and SGSN forwarding face equipment 2 can be respectively as a network element device in communication system.In the another kind of application scenarios of the present embodiment, above-mentioned SGSN chain of command equipment, SGSN forward face equipment 1 and SGSN and forward inside composition module integration that face equipment 2 also can be used as a network element device and jointly complete a SGSN inside function of SGSN.In another kind of application scenarios, for unified with 3G network, SGSN chain of command equipment can be responsible for the processing of the chain of command data of 2G and 3G simultaneously, SGSN forwards face equipment and is responsible for the BSC data that receive by Gb Interface to carry out classification transmission, 2G chain of command data are sent to SGSN chain of command equipment, 2G is forwarded to face data and send to SGW; Meanwhile SGW is received the 3G data of BSC and is carried out similar classification transmission processing by Iu interface.Further, SGSN can also be forwarded to face integration of equipments in SGW, so no matter the 3G data of Iu interface or the 2G data of Gb Interface can carry out classification transmission on SGW, SGW does upper-layer protocol processing by 2G or 3G chain of command data retransmission to SGSN chain of command node, and 2G or 3G forwarding face data are transmitted to PGW according to mapping relations table.
It should be noted that, the embodiment of the present invention only take a chain of command equipment to having two erection modes that forward face equipment as example, in practical application can according to the size configure of the face of forwarding data service flow forward face equipment number.For example, forward face service traffics hour, can configure corresponding one of a chain of command equipment and forward face equipment; When forwarding face service traffics are larger, can configure the corresponding three or more forwarding face equipment of a chain of command equipment, the embodiment of the present invention does not limit this.In the time existing multiple SGSN to forward face equipment, forward between face equipment and set up parallel forwarding channel, select optimal path to forward the data to GGSN or BSC.
What deserves to be explained is, in the embodiment of the present invention specific descriptions of part steps can reference example 1-embodiment 2 and embodiment 4-embodiment 7 in corresponding content, the embodiment of the present invention will no longer be described in detail here.
The data transmission method that the embodiment of the present invention provides, by SGSN forward face equipment by chain of command data retransmission to SGSN chain of command device processes, forwarding face data are transmitted to gateway device according to forwarding mapping relations table, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and improved the forward process efficiency of SGSN forwarding face data.
Embodiment 4
The embodiment of the present invention provides a kind of SGSN to forward face equipment, as shown in figure 11, comprising: receiving element 61, control transmitting element 62, forwarded upstream unit 63.
Receiving element 61, the first data that send for receiving base station controller BSC;
Control transmitting element 62, while being chain of command data for the first data that receive when described receiving element 61, described the first data are sent to SGSN chain of command equipment;
Forwarded upstream unit 63, while being forwarding face data, is sent to corresponding gateway device according to forwarding configuration information by described the first data for the first data that receive when described receiving element 61; Wherein said forwarding configuration information issues configuration by described SGSN chain of command equipment.
Further, this SGSN forwarding face equipment also comprises: set up unit 64.
Set up unit 64, for after described the first data are sent to SGSN chain of command equipment by described control transmitting element 62, receive the forwarding configuration information that described SGSN chain of command equipment sends, and set up described forwarding mapping relations table according to described forwarding configuration information;
Wherein, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
Further, this SGSN forwarding face equipment also comprises: down forward unit 65.
Down forward unit 65, the second data that issue for receiving described SGSN chain of command equipment or described gateway device, and according to the described forwarding mapping relations table of setting up unit 64 of setting up, described the second data are sent to corresponding BSC.
Further, described SGSN chain of command equipment is to there being at least two SGSN to forward face equipment; Described SGSN forwards face equipment and also comprises: query unit 66, parallel retransmission unit 67.
Query unit 66, for receive the 3rd data of described BSC transmission at described receiving element 61 after, with down forward after unit 65 receives the 3rd data that described SGSN chain of command equipment or gateway device issue described, according to the described forwarding configuration information of setting up unit 64 of setting up of forwarding identification information inquiry carrying in described the 3rd data, determine the transmission interface place equipment that described forwarding face data are corresponding;
Parallel retransmission unit 67, be used in the time that described query unit 66 determines that the transmission interface place equipment of described the 3rd data is not described SGSN forwarding face equipment, described the 3rd data are sent to other SGSN and forward face equipment, so that described other SGSN forward face equipment, described the 3rd data are sent to described gateway device or described BSC.
It should be noted that, in the embodiment of the present invention specific descriptions of part of module can reference example 1-embodiment 3 and embodiment 5-embodiment 7 in corresponding content, the embodiment of the present invention will repeat here no longer one by one.
The SGSN that the embodiment of the present invention provides forwards face equipment, receive BSC send the first data after by chain of command data retransmission to SGSN chain of command device processes, forwarding face data are transmitted to gateway device according to forwarding mapping relations table, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and effectively improved the forward process efficiency of SGSN forwarding face data.
Embodiment 5
The embodiment of the present invention provides a kind of SGSN chain of command equipment, as shown in figure 12, comprising: receiving element 71, dispensing unit 72, the first transmitting element 73.
Receiving element 71, forwards for receiving SGSN the first data that face equipment sends;
Dispensing unit 72 is that described SGSN forwards the forwarding configuration information of face devices allocation for data retransmission mapping for the first data that receive according to described receiving element 71;
Transmitting element 73, is sent to described SGSN for the forwarding configuration information that described dispensing unit 72 is distributed and forwards face equipment.Wherein, described SGSN forwards face equipment and can set up forwarding mapping relations table according to described forwarding configuration information.
Further, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
It should be noted that, in the embodiment of the present invention specific descriptions of part of module can reference example 1-embodiment 4 and embodiment 6-embodiment 7 in corresponding content, the embodiment of the present invention will repeat here no longer one by one.
The SGSN chain of command equipment that the embodiment of the present invention provides, be responsible for processing controls face data, and the configuration information that forwards mapping relations table is handed down to SGSN forwarding face equipment, so that SGSN forwards face equipment processing forward business separately, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and effectively improved the forward process efficiency of SGSN forwarding face data.
Embodiment 6
The embodiment of the present invention provides a kind of SGSN to forward face equipment, as shown in figure 13, comprising: first interface 81, the second interface 82, the 3rd interface 83, processor 84 and memory 85.
Described first interface 81, for carrying out data interaction with SGSN chain of command equipment;
Described the second interface 82, for carrying out data interaction with base station controller BSC;
Described the 3rd interface 83, for carrying out data interaction with gateway device;
Described memory 85, for storage forwarding configuration information, wherein said forwarding configuration information is that described SGSN chain of command equipment issues by described first interface 81;
Described processor 84, for judging that the first data that receive by described the second interface 82 are chain of command data or the face of forwarding data, if chain of command data, send described the first data to described SGSN chain of command equipment by described first interface 81, if the face of forwarding data, send described the first data to corresponding gateway device according to described forwarding configuration information by described the 3rd interface 83.
Further, described processor 84 is for sending described the first data to corresponding gateway device according to described forwarding configuration information by described the 3rd interface 83, be specially: described processor 84 is for sending described the first data to corresponding gateway device according to forwarding mapping relations table by described the 3rd interface 83, and wherein said forwarding mapping relations table is set up according to described forwarding configuration information;
Described memory 85, for storage forwarding configuration information, is specially: described memory 85 is for storing described forwarding mapping relations table.
Further, the forwarding configuration information that described memory 85 is stored comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
Further, described processor 84, is also sent to corresponding BSC by the second data that receive by described first interface 81 or the 3rd interface 83 by described the second interface 82 for the forwarding configuration information of storing according to described memory 85.
Further, described SGSN forwards face equipment and also comprises the 5th interface 86, and described the 5th interface 86 forwards between face equipment and carries out data interaction for two described SGSN;
Described processor, also for after receiving the 3rd data by described the second interface 82, described first interface 81 or described the 3rd interface 83, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, send described the 3rd data by described the 5th interface 86 and forward face equipment to described other described SGSN.
It should be noted that, in the embodiment of the present invention specific descriptions of part of module can reference example 1-5 and embodiment 7 in corresponding content, the embodiment of the present invention will repeat here no longer one by one.
The SGSN that the embodiment of the present invention provides forwards face equipment, receive BSC send the first data after by chain of command data retransmission to SGSN chain of command device processes, forwarding face data are transmitted to gateway device according to forwarding mapping relations table, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and effectively improved the forward process efficiency of SGSN forwarding face data.
Embodiment 7
The embodiment of the present invention provides a kind of SGSN chain of command equipment, as shown in figure 14, comprising: first interface 91 and processor 92.
Described first interface 91, for carrying out data interaction with SGSN chain of command equipment;
Described processor 92, for sending described forwarding configuration information by described first interface 91 to described SGSN forwarding face equipment, and carries out the processing of chain of command to the chain of command data of sending by described first interface 91.
Further, described SGSN chain of command equipment also comprises: the 4th interface 93, described the 4th interface 93 is for carrying out chain of command data interaction with gateway device.
Further, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
It should be noted that, in the embodiment of the present invention specific descriptions of part of module can reference example 1-embodiment 6 in corresponding content, the embodiment of the present invention will repeat here no longer one by one.
The SGSN that the embodiment of the present invention provides, by SGSN forward face equipment by chain of command data retransmission to SGSN chain of command device processes, forwarding face data are transmitted to gateway device according to forwarding mapping relations table, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, due to forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, and effectively improved the forward process efficiency of SGSN forwarding face data.
Embodiment 8
The embodiment of the present invention provides a kind of SGSN, as shown in figure 15, comprises in the inside of SGSN: SGSN forwards face equipment 1001; And, SGSN chain of command equipment 1002.
Described SGSN forwards face equipment 1001, carries out data interaction by first interface and SGSN chain of command equipment; Carry out data interaction by the second interface and base station controller BSC; Carry out data interaction by the 3rd interface and gateway device; Described SGSN forwards face equipment 1001 for judging that the first data that receive by described the second interface are chain of command data or the face of forwarding data, if chain of command data, send described the first data to described SGSN chain of command equipment 1002 by described first interface, if the face of forwarding data, send described the first data to corresponding gateway device according to described forwarding configuration information by described the 3rd interface.
Wherein, BSC and SGSN forward between face equipment and are connected by the second interface, and the data type of the first data that BSC sends comprises chain of command data and the face of forwarding data.Chain of command data are the data that need chain of command protocol processes, mainly comprise control signal, and forwarding face data is only to need to forward the data that face agreement is processed, and can participate in without chain of command agreement, mainly comprise business datum content.In the underlying protocol of data, comprise and can identify the protocol-identifier that these data are forwarding face data or chain of command data, SGSN forward face equipment can be from underlying protocol such as IP layer or NS layer etc., thereby obtain this protocol-identifier specified data type.
Described SGSN chain of command equipment 1002, carries out data interaction by first interface and SGSN chain of command equipment 1001, and SGSN chain of command equipment 1002 forwards for receiving described SGSN the chain of command data that face equipment 1001 sends; Be that described SGSN forwards the forwarding configuration information of face devices allocation for data retransmission mapping according to described chain of command data; Described forwarding configuration information is sent to described SGSN and forwards face equipment 1001, set up described forwarding mapping relations table so that described SGSN forwards face equipment 1001 according to described forwarding configuration information.
Described SGSN forwards face equipment 1001, the forwarding configuration information also sending for receiving described SGSN chain of command equipment 1002, and set up described forwarding mapping relations table according to described forwarding configuration information.
Wherein, described SGSN forwards face equipment 1001 and is connected with BSC by the second interface, and SGSN forwards face equipment 1001 and receives data by the second interface from BSC, or sends data to BSC.Described SGSN forwards face equipment 1001 and is connected with gateway device by the 3rd interface, and described SGSN forwards face equipment 1001 and sent forwarding face data or receive the forwarding face data that gateway device issues to gateway device by the 3rd interface.Described SGSN chain of command equipment 1002 is connected with gateway device by the 4th interface, and described SGSN chain of command equipment 1002 is sent chain of command data or receives the chain of command data that gateway device issues to gateway device by the 4th interface.Forward between face equipment and SGSN chain of command equipment at SGSN, connect by first interface, the particular type that the present invention forwards the connecting interface between face equipment and SGSN chain of command equipment to SGSN does not limit, and first interface forwards the data interaction between face equipment 1001 for SGSN chain of command equipment 1002 and SGSN.
Further, described SGSN chain of command equipment 1002 carries out data interaction to there being at least two SGSN to forward between 1001, two SGSN forwarding face equipment of face equipment by the 5th interface.When described SGSN forwarding face equipment 1001 receives the first data of described BSC transmission by the second interface after, with after the second data that receive described SGSN chain of command equipment 1002 by first interface or issue by the 3rd interface reception gateway device, SGSN forwards face equipment 1001 can also inquire about described forwarding mapping relations table according to the forwarding identification information carrying in described the second data, determines the transmission interface place equipment that described the second data are corresponding;
If not being described SGSN, described transmission interface place equipment forwards face equipment 1001, described the second data are sent to other SGSN and forward face equipment 1001, so that described other SGSN forward face equipment, described the second data are sent to described gateway device or described BSC.
In the present embodiment, it is the module that can realize the forwarding face processing capacity of existing SGSN that SGSN forwards face equipment 1001, and SGSN chain of command equipment 1002 is the module that can realize the chain of command processing capacity of existing SGSN.Like this, just can will forward face data and the processing of chain of command data separating in SGSN inside, thereby improve the forward efficiency of forwarding face data.And, can forward face equipment in SGSN internal extended, multiple SGSN are for example set in SGSN inside and forward face equipment, thereby further improve the forward efficiency of forwarding face data.
It should be noted that, in the embodiment of the present invention specific descriptions of part of module can reference example 1-embodiment 7 in corresponding content, the embodiment of the present invention will repeat here no longer one by one.
The SGSN that the embodiment of the present invention provides, SGSN by SGSN inside forward face equipment by chain of command data retransmission the SGSN chain of command device processes to SGSN inside, forwarding face data are transmitted to gateway device according to forwarding mapping relations table, with SGSN in prior art, any data that receive are all adopted compared with the complete protocol stack handling process of chain of command data, forwarding face data processing and chain of command data processing are separated, make to expand separately forwarding face equipment, the forward process efficiency of SGSN forwarding face data in 2G network is effectively improved.
Those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can above-mentioned functions be distributed and completed by different functional modules as required, be divided into different functional modules by the internal structure of device, to complete all or part of function described above.The system of foregoing description, the specific works process of device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described module or unit, be only that a kind of logic function is divided, when actual realization, can have other dividing mode, for example multiple unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, the each functional unit in each embodiment of the application can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.
If described integrated unit is realized and during as production marketing independently or use, can be stored in a computer read/write memory medium using the form of SFU software functional unit.Based on such understanding, the all or part of of the part that the application's technical scheme contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) or processor (processor) carry out all or part of step of method described in each embodiment of the application.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.
The above, above embodiment only, in order to the application's technical scheme to be described, is not intended to limit; Although the application is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the each embodiment technical scheme of the application.
Claims (21)
1. a data transmission system, is characterized in that, comprising:
Service universal grouping wireless Serving GPRS Support Node SGSN chain of command equipment; And at least one SGSN forwards face equipment; Described SGSN forwards face equipment and described SGSN control appliance carries out data interaction by first interface; Described SGSN forwards face equipment and is provided with the second interface and the 3rd interface, and described the second interface is for carrying out data interaction with base station controller BSC, and described the 3rd interface is for carrying out data interaction with gateway device;
Described SGSN forwards face equipment for judging that the first data that receive by described the second interface are chain of command data or the face of forwarding data, if chain of command data, send described the first data to described SGSN chain of command equipment by described first interface, if the face of forwarding data, send described the first data to corresponding gateway device according to forwarding configuration information by described the 3rd interface;
Described SGSN chain of command equipment forwards face equipment for send the extremely described SGSN of described forwarding configuration information by described first interface, and described first data of sending by described first interface are carried out to the processing of chain of command.
2. data transmission system according to claim 1, is characterized in that, described SGSN chain of command equipment is also provided with the 4th interface, and described the 4th interface is for carrying out chain of command data interaction with gateway device; Described the 3rd interface is for forwarding face data interaction with gateway device.
3. data transmission system according to claim 1 and 2, is characterized in that, described SGSN forwards face equipment for sending described the first data to corresponding gateway device according to forwarding configuration information by described the 3rd interface, is specially:
Described SGSN forwards face equipment for sending described the first data to corresponding gateway device according to forwarding mapping relations table by described the 3rd interface, and wherein said forwarding mapping relations table is set up according to described forwarding configuration information.
4. according to the arbitrary described data transmission system of claim 1-3, it is characterized in that, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
5. according to the arbitrary described data transmission system of claim 1-4, it is characterized in that,
Described SGSN forwards face equipment, also for receiving described SGSN chain of command equipment by described first interface or receiving by described the 3rd interface the second data that described gateway device issues, and according to described forwarding configuration information, described the second data are sent to corresponding BSC by described the second interface.
6. according to the arbitrary described data transmission system of claim 1-5, it is characterized in that, described system at least comprises that two described SGSN forward face equipment, described two described SGSN forward between face equipment and are provided with the 5th interface, and described the 5th interface forwards between face equipment and carries out data interaction for described two described SGSN;
Described SGSN forward face equipment also for, after receiving the 3rd data by described the second interface, described first interface or described the 3rd interface, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, send described the 3rd data by described the 5th interface and forward face equipment to described other described SGSN.
7. service universal grouping wireless Serving GPRS Support Node SGSN forwards a face equipment, it is characterized in that, comprises first interface, the second interface, the 3rd interface, processor and memory;
Described first interface, for carrying out data interaction with SGSN chain of command equipment;
Described the second interface, for carrying out data interaction with base station controller BSC;
Described the 3rd interface, for carrying out data interaction with gateway device;
Described memory, for storage forwarding configuration information, wherein said forwarding configuration information is that described SGSN chain of command equipment issues by described first interface;
Described processor, for judging that the first data that receive by described the second interface are chain of command data or the face of forwarding data, if chain of command data, send described the first data to described SGSN chain of command equipment by described first interface, if the face of forwarding data, send described the first data to corresponding gateway device according to described forwarding configuration information by described the 3rd interface.
8. SGSN according to claim 7 forwards face equipment, it is characterized in that,
Described processor is for sending described the first data to corresponding gateway device according to described forwarding configuration information by described the 3rd interface, be specially: described processor is for sending described the first data to corresponding gateway device according to forwarding mapping relations table by described the 3rd interface, and wherein said forwarding mapping relations table is set up according to described forwarding configuration information;
Described memory, for storage forwarding configuration information, is specially: described memory is used for storing described forwarding mapping relations table.
9. forward face equipment according to the SGSN described in claim 7 or 8, it is characterized in that, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
10. forward face equipment according to the arbitrary described SGSN of claim 7-9, it is characterized in that,
Described processor, also for being sent to corresponding BSC by the second data that receive by described first interface or the 3rd interface by described the second interface according to described forwarding configuration information.
11. forward face equipment according to the arbitrary described SGSN of claim 7-10, it is characterized in that,
Described SGSN forwards face equipment and also comprises the 5th interface, and described the 5th interface forwards between face equipment and carries out data interaction for two described SGSN;
Described processor, also for after receiving the 3rd data by described the second interface, described first interface or described the 3rd interface, determine that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, send described the 3rd data by described the 5th interface and forward face equipment to described other described SGSN.
12. 1 kinds of service universal grouping wireless Serving GPRS Support Node SGSN chain of command equipment, is characterized in that, comprise first interface and processor;
Described first interface, for carrying out data interaction with SGSN chain of command equipment;
Described processor, for sending described forwarding configuration information by described first interface to described SGSN forwarding face equipment, and carries out the processing of chain of command to the chain of command data of sending by described first interface.
13. SGSN chain of command equipment according to claim 12, is characterized in that, also comprise the 4th interface, and described the 4th interface is for carrying out chain of command data interaction with gateway device.
14. according to the SGSN chain of command equipment described in claim 12 or 13, it is characterized in that, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
15. 1 kinds of data transmission methods, is characterized in that, comprising:
Service universal grouping wireless Serving GPRS Support Node SGSN forwards face equipment and receives the first data that base station controller BSC sends;
If described the first data are chain of command data, described SGSN forwards face equipment described the first data is sent to SGSN chain of command equipment;
If described the first data are forwarding face data, described SGSN forwards face equipment, according to forwarding configuration information, described the first data is sent to corresponding gateway device; Wherein said forwarding configuration information is issued by described SGSN chain of command equipment.
16. methods according to claim 15, is characterized in that, described method also comprises:
Described SGSN forwards face equipment and sets up and forward mapping relations table according to described forwarding configuration information.
17. according to the method described in claim 15 or 16, it is characterized in that, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
18. according to the method described in any one in claim 15-17, it is characterized in that, also comprises:
Described SGSN forwards face equipment and receives the second data that described SGSN chain of command equipment or described gateway device issue, and according to described forwarding mapping relations table, described the second data is sent to corresponding BSC.
19. according to the method described in claim 15-18 any one, it is characterized in that, described SGSN chain of command equipment is to there being at least two described SGSN to forward face equipment; After described SGSN forwarding face equipment receives the 3rd data of described BSC, described SGSN chain of command equipment or gateway device transmission, described method also comprises:
Described SGSN forwards face equipment and determines that according to the forwarding identification information carrying in described the 3rd data and described forwarding configuration information the equipment at transmission interface place corresponding to described the 3rd data is that other described SGSN forwards face equipment, sends described the 3rd data and forwards face equipment to described other described SGSN.
20. 1 kinds of data transmission methods, is characterized in that, comprising:
SGSN chain of command equipment is that described SGSN forwards the forwarding configuration information of face devices allocation for data retransmission;
Described SGSN chain of command equipment is sent to described SGSN by described forwarding configuration information and forwards face equipment.
21. methods according to claim 20, is characterized in that, described forwarding configuration information comprises: Network virtual link NSVC transmits, BSSGP Identifier of the virtual connection BVCI transmits and/or forwards the relevant convergence protocol SNDCP-U of face net and transmits.
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