CN106792656B - Data transmission method and asymmetric shunting system - Google Patents

Data transmission method and asymmetric shunting system Download PDF

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Publication number
CN106792656B
CN106792656B CN201611087815.3A CN201611087815A CN106792656B CN 106792656 B CN106792656 B CN 106792656B CN 201611087815 A CN201611087815 A CN 201611087815A CN 106792656 B CN106792656 B CN 106792656B
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user equipment
information
functional component
uplink data
forwarding
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CN106792656A (en
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刘泉
王国骄
黄兴华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/668—Internet protocol [IP] address subnets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2441—Traffic characterised by specific attributes, e.g. priority or QoS relying on flow classification, e.g. using integrated services [IntServ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2483—Traffic characterised by specific attributes, e.g. priority or QoS involving identification of individual flows

Abstract

The application provides a data transmission method and an asymmetric shunt system, which reduce a downlink distributor in the existing symmetric shunt system, thereby reducing the time consumption in the downlink data transmission process and saving the virtual machine cost of the distributor. The method provided by the embodiment of the invention comprises the following steps: the first forwarding function component acquires uplink data of the user equipment and sends the uplink data to the NAT equipment; the NAT equipment sends the uplink data to a service network and receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises network protocol IP information of the service network; the NAT equipment converts the IP information of the service network in the downlink data into the IP information of the user equipment; the NAT equipment sends the downlink data to the second forwarding functional component according to the IP information of the user equipment; and the second forwarding functional component determines the target access network equipment corresponding to the user equipment according to the IP information of the user equipment and sends the downlink data to the target access network equipment.

Description

Data transmission method and asymmetric shunting system
Technical Field
The present application relates to the field of communications technologies, and in particular, to a data transmission method and an asymmetric flow distribution system.
Background
The International Telecommunications Union (ITU) summarizes the prospects of the METIS project for the fifth generation mobile communications technology (5G) in a white paper and describes: with the thousands of times of mobile traffic (with a traffic standard of 36 TB/month/person) brought by Machine-To-Machine (M2M), User Equipment (UE) has multiple access (with a single-node number standard of 30W), and according To different application scenarios, 5G is required To have a high data rate (1-10Gbps), a low time delay (1 millisecond), a high reliability (99.999%), a flexible spectrum application technique, and the like. With the continuous development of cloud computing Technology, the Internet Technology (IT) and the telecommunication Network Technology (CT) are mutually permeated and fused, and CT operators provide a cloud computing architecture in the Information Communication Technology (ICT) field, i.e., a Network Function Virtualization (NFV) standard architecture, to deal with opportunities and challenges brought by cloud computing and Virtualization, so as to promote the performance improvement, cost reduction, convenient operation and maintenance of a mobile Network.
Existing NFV standard architecture-based architecture virtualizes an Evolved Packet Core (EPC), and a Mobility Management Entity (MME), a Serving GateWay (SGW), a Home Subscriber Server (HSS), a Public Data Network GateWay (PGW), and the like in the EPC form multiple Virtualized Network Functions (VNF), after an Attach procedure (Attach) of the EPC is completed, an air bearer of the VNF is established, an Evolved Packet System (EPS) bearer is established therewith, a Data transmission tunnel between an access Network device and an SGW and a PGW is established, at this time, the UE may perform Data transmission through an access Network device and a Data transmission tunnel, as shown in fig. 1, a dashed arrow indicates a solid line that controls a flow direction of signaling, and an arrow indicates a flow direction of Data through an access Network side and an eNB (base station side) that distribute Data through the access Network device and the base station side The processing unit 1 and a Network Address Translation (NAT) gateway implement the translation of internal and external Network data with the internet. Because of the limitation of network IP information resources, it is required that the NAT gateway plays a role in subnet allocation.
However, the distributors on the base station side and the network side process data offloading according to the base station level, and in a public cloud scenario, due to wide coverage, the number of enbs is large, and the overhead of the distributors is large; when data is processed in a downlink, the forwarding functions of the distributor and the processing unit are overlapped, and repeated execution of the forwarding functions will inevitably waste time, thereby increasing time delay.
Disclosure of Invention
The application provides a data transmission method and an asymmetric shunt system, which reduce a downlink distributor in the existing symmetric shunt system, thereby reducing the time consumption in the downlink data transmission process and saving the virtual machine cost of the distributor.
The first aspect of the present invention provides a data transmission method, which is applied to an asymmetric distribution system, where the asymmetric distribution system includes at least two forwarding functional components and a network address translation NAT device, and includes:
a first forwarding function component acquires uplink data of user equipment and sends the uplink data to the NAT equipment;
the NAT equipment sends the uplink data to a service network and receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises network protocol IP information of the service network;
the NAT equipment converts the IP information of the service network in the downlink data into the IP information of the user equipment;
the NAT equipment sends the downlink data to a second forwarding functional component according to the IP information of the user equipment;
and the second forwarding functional component determines target access network equipment corresponding to the user equipment according to the IP information of the user equipment and sends the downlink data to the target access network equipment.
The first forwarding functional component acquires uplink data of user equipment reported by a base station, the base station can be multiple, the number of the user equipment in a cell covered by the base station is within a range which can be borne by the base station, the specific number of the user equipment is not limited, the acquired uplink data of the user equipment is sent to the NAT equipment, the NAT equipment sends the uplink data to a service network after receiving the uplink data sent by the first forwarding functional component, the service network can feed back the uplink data after receiving the uplink data, the NAT equipment receives downlink data fed back by the service network according to the uplink data, and the downlink data naturally comprises IP information of the service network due to the fact that the equipment in different network segments has different IP information. After receiving the downlink data, the NAT device needs to send the downlink data to the user equipment, and the downlink data only can serve the IP information of the network from the terminal, so that the downlink data cannot be sent to the user equipment under the condition that the IP information of the user equipment cannot be determined, and the IP information of the service network needs to be converted into the IP information of the user equipment, and a specific conversion process is a preset conversion rule, so that the existing NAT technology can be implemented. The NAT device can determine which subnet the downlink data needs to be sent through according to the IP information of the user device, and when the forwarding functional component is set, one subnet segment generally corresponds to one forwarding functional component, so that the downlink data is sent to the second forwarding functional component according to the IP information of the user device. Since the second forwarding functional component itself stores the user session of the user equipment, or the user session of the user equipment can be obtained through other methods (for example, accessing the session management functional component), it can be determined according to the IP information of the user equipment which base station is located in the cell, and then after determining the target base station (i.e., target access network equipment) corresponding to the user equipment, the downlink data is sent to the target base station, and the base station sends the downlink data to the user equipment. Compared with the prior art, downlink data does not need to be sent to the access network equipment through the distributor, so that the time consumption in the downlink data transmission process is reduced; and the reduction of dispatchers may save virtual machine costs.
With reference to the first aspect of the present invention, in the first embodiment of the first aspect of the present invention, the asymmetric shunting system further includes a session management function component,
the second forwarding functional component determines a target access network device corresponding to the user equipment according to the IP information of the user equipment, and sends the downlink data to the target access network device, including:
the second forwarding functional component accesses the session management functional component according to the IP information of the user equipment to obtain the user session of the user equipment;
the second forwarding functional component determines target access network equipment which establishes communication connection with the user equipment according to the user session of the user equipment;
and the second forwarding functional component sends the downlink data to the target access network equipment, so that the target access network equipment sends the downlink data to the user equipment.
The asymmetric shunting system also comprises a session management function component, the session management function component is a session management entity of the SGW and the PGW and is responsible for interacting with the MME to create, modify and delete a session of a user, therefore, the second forwarding function component accesses the session management function component according to IP information of the user equipment to obtain the user session of the user equipment, a gateway included in a communication link for establishing connection between the user equipment and a communication network can be clarified through the user session, the gateway can comprise network equipment such as a base station or the MME and can determine target access network equipment for establishing communication connection with the user equipment according to the user session, namely the user equipment is determined to be in a cell of a target base station, after the second forwarding function component determines the target access network equipment, downlink data is sent to the target access network equipment through a forwarding routing function, and the target access network equipment can send the IP information of the user equipment in the downlink data, and transmitting the downlink data to the user equipment through the communication link. The detailed explanation shows that the distributor is not needed, and the issued data can be accurately sent to the user equipment.
With reference to the first aspect of the present invention, in a second implementation manner of the first aspect of the present invention, the sending, by the NAT device, the downlink data to a second forwarding functional component according to the IP information of the user equipment includes:
the NAT equipment searches a second forwarding functional component corresponding to the IP information of the user equipment from the forwarding functional components according to the IP information of the user equipment;
and the NAT equipment sends the downlink data to the second forwarding functional component.
Because the NAT device functions as a split routing function for uplink and downlink data, the NAT device essentially classifies the IP information of different user devices, for example, a plurality of consecutive IP information are used as a subnet segment, and each subnet is routed to one forwarding function component, so that data is forwarded out.
With reference to the first aspect of the present invention, in a third implementation manner of the first aspect of the present invention, the uplink data includes IP information of the user equipment,
the NAT device sends the uplink data to a service network, and receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises IP information of the service network, and the method comprises the following steps:
the NAT equipment converts the IP information of the user equipment in the uplink data into IP information of a service network;
the NAT equipment sends the uplink data to the service network according to the IP information of the service network;
and the NAT equipment receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises IP information of the service network.
When the NAT device sends the uplink data to the service network, it needs to consider the problem of the IP packet of the uplink data, the IP packet is generated according to the IP information of the user equipment, and the service network processes the uplink data, which is actually implemented by a virtual machine or a physical device, so the service network also needs to have the IP information, and there is an important step that the NAT device can smoothly send the uplink data to the service network: converting the IP information of the user equipment into IP information of a service network; therefore, after acquiring the uplink data, the NAT device converts the IP information of the user equipment in the uplink data into the IP information of the service network, the IP information conversion mode of the NAT device is preset, after acquiring the IP information of the service network, the NAT device sends the uplink data to the service network, after receiving the uplink data, the service network processes the uplink data to obtain downlink data, the downlink data needs to be fed back to the user equipment sending the uplink data, and since the downlink data received by the NAT device is sent by the service network, the downlink data certainly includes the IP information of the service network.
With reference to the first aspect, the first embodiment of the first aspect, the second embodiment of the first aspect, or the third embodiment of the first aspect, in a fourth embodiment of the first aspect of the present invention, the asymmetric flow distribution system further includes an LB,
before the first forwarding functional component acquires uplink data of the user equipment, the method further includes:
the LB acquires the uplink data of the user equipment through the access network equipment;
the LB determines a first forwarding function component in the forwarding function components according to a preset shunt table or randomly;
the LB sends the uplink data to the first forwarding function component.
An access network device (e.g., a base station) will send uplink data sent by a user equipment to an LB, where the LB stores a dynamically changing offload Table, and a basic structure of the offload Table is (key, value). The value of the shunting according to the key can be configured according to different algorithms, and the corresponding value is the corresponding forwarding functional component; or, when there is no record in the shunt table, for example, when a certain key value appears for the first time, the forwarding functional components may also be randomly allocated; or, according to a preset specified policy, a specific forwarding functional component may be specified, which is not limited specifically.
With reference to the fourth implementation manner of the first aspect of the present invention, in a fifth implementation manner of the first aspect of the present invention, the acquiring, by the first forwarding function component, uplink data of a user equipment, and sending the uplink data to the NAT device includes:
a first forwarding function component receives uplink data of the user equipment sent by the LB, wherein the uplink data is in a data packet format;
the first forwarding function component determining whether a user session of the user equipment exists;
if so, the first forwarding function component sends the uplink data to the NAT equipment;
if not, the first forwarding functional component accesses the session management functional component and determines whether the session management functional component has the user session of the user equipment;
if the session management functional component has the user session of the user equipment, the first forwarding functional component acquires the user session of the user equipment in the session management functional component and sends the uplink data to the NAT equipment;
and if the session management functional component does not have the user session of the user equipment, the first forwarding functional component deletes the uplink data.
After the first forwarding functional component receives the uplink data, before sending the uplink data to the NAT device, the first forwarding functional component needs to decode the uplink data in the data packet format, and in a general case, if a user session is established and the first forwarding functional component knows the user session, the uplink data can be decoded, so that the first forwarding functional component receives the uplink data, and if the uplink data can be decoded, the user session of the user device is indicated to exist, and the first forwarding functional component sends the uplink data to the NAT device; since the existing session management function component has a role including management of user sessions, there is a possibility that the user equipment sends uplink data first and performs cell handover before the first forwarding function component forwards the uplink data, so that the user session is changed, and the session management function component knows the changed user session but does not know the first forwarding function component, so that the uplink data cannot be decoded. If the first forwarding functional component does not have the user session of the user equipment, the first forwarding functional component accesses the session management functional component, and if the session management functional component has the user session of the user equipment, the first forwarding functional component acquires the user session of the user equipment in the session management functional component and sends uplink data to the NAT equipment; if the session management functional component does not have the user session of the user equipment, it indicates that the user equipment has disconnected the user session and a new user session is not established, the uplink data is an error data packet, and the first forwarding functional component in the general processing manner deletes the uplink data, and other manners are also applicable without limitation.
A second aspect of the present invention provides an asymmetric flow splitting system, comprising:
the first forwarding functional component is used for acquiring uplink data of the user equipment and sending the uplink data to the NAT equipment;
the NAT device is used for sending the uplink data to a service network and receiving downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises network protocol IP information of the service network;
the NAT device is further configured to convert the IP information of the service network in the downlink data into the IP information of the user equipment;
the NAT equipment is also used for sending the downlink data to a second forwarding functional component according to the IP information of the user equipment;
and the second forwarding functional component is used for determining target access network equipment corresponding to the user equipment according to the IP information of the user equipment and sending the downlink data to the target access network equipment.
The first forwarding functional component acquires uplink data of user equipment reported by a base station, the base station can be multiple, the number of the user equipment in a cell covered by the base station is within a range which can be borne by the base station, the specific number of the user equipment is not limited, the acquired uplink data of the user equipment is sent to the NAT equipment, the NAT equipment sends the uplink data to a service network after receiving the uplink data sent by the first forwarding functional component, the service network can feed back the uplink data after receiving the uplink data, the NAT equipment receives downlink data fed back by the service network according to the uplink data, and the downlink data naturally comprises IP information of the service network due to the fact that the equipment in different network segments has different IP information. After receiving the downlink data, the NAT device needs to send the downlink data to the user equipment, and the downlink data only can serve the IP information of the network from the terminal, so that the downlink data cannot be sent to the user equipment under the condition that the IP information of the user equipment cannot be determined, and the IP information of the service network needs to be converted into the IP information of the user equipment, and a specific conversion process is a preset conversion rule, so that the existing NAT technology can be implemented. The NAT device can determine which subnet the downlink data needs to be sent through according to the IP information of the user device, and when the forwarding functional component is set, one subnet segment generally corresponds to one forwarding functional component, so that the downlink data is sent to the second forwarding functional component according to the IP information of the user device. Since the second forwarding functional component itself stores the user session of the user equipment, or the user session of the user equipment can be obtained through other methods (for example, accessing the session management functional component), it can be determined according to the IP information of the user equipment which base station is located in the cell, and then after determining the target base station (i.e., target access network equipment) corresponding to the user equipment, the downlink data is sent to the target base station, and the base station sends the downlink data to the user equipment. Compared with the prior art, downlink data does not need to be sent to the access network equipment through the distributor, so that the time consumption in the downlink data transmission process is reduced; and the reduction of dispatchers may save virtual machine costs.
With reference to the second aspect of the present invention, in a first embodiment of the second aspect of the present invention, the system further includes: a session management function component;
the session management function component is used for recording the user session of the user equipment;
the second forwarding functional component is further configured to access the session management functional component according to the IP information of the user equipment, so as to obtain a user session of the user equipment;
the second forwarding functional component is further configured to determine, according to the user session of the user equipment, a target access network device that establishes a communication connection with the user equipment;
and the second forwarding functional component sends the downlink data to the target access network equipment, so that the target access network equipment sends the downlink data to the user equipment.
The asymmetric shunting system also comprises a session management function component, the session management function component is a session management entity of the SGW and the PGW and is responsible for interacting with the MME to create, modify and delete a session of a user, therefore, the second forwarding function component accesses the session management function component according to IP information of the user equipment to obtain the user session of the user equipment, a gateway included in a communication link for establishing connection between the user equipment and a communication network can be clarified through the user session, the gateway can comprise network equipment such as a base station or the MME and can determine target access network equipment for establishing communication connection with the user equipment according to the user session, namely the user equipment is determined to be in a cell of a target base station, after the second forwarding function component determines the target access network equipment, downlink data is sent to the target access network equipment through a forwarding routing function, and the target access network equipment can send the IP information of the user equipment in the downlink data, and transmitting the downlink data to the user equipment through the communication link. The detailed explanation shows that the distributor is not needed, and the issued data can be accurately sent to the user equipment.
In combination with the second aspect of the present invention, in a second embodiment of the second aspect of the present invention,
the NAT device is further configured to search a second forwarding function component corresponding to the IP information of the user equipment from the forwarding function component according to the IP information of the user equipment;
the NAT device is further configured to send the downlink data to the second forwarding functional component.
Since the NAT device functions as a shunting routing function for uplink and downlink data, the NAT device is substantially classified according to the IP information of different user devices, for example, a plurality of consecutive IP information are used as one subnet segment, and each subnet is routed to one forwarding function component, so that data is forwarded out.
With reference to the second aspect of the present invention, in a third implementation manner of the second aspect of the present invention, the uplink data includes IP information of the user equipment,
the NAT device is further configured to convert the IP information of the user equipment in the uplink data into IP information of a service network;
the NAT equipment is further used for sending the uplink data to the service network according to the IP information of the service network;
the NAT device is further configured to receive downlink data fed back by the service network according to the uplink data, where the downlink data includes IP information of the service network.
When the NAT device sends the uplink data to the service network, it needs to consider the problem of the IP packet of the uplink data, the IP packet is generated according to the IP information of the user equipment, and the service network processes the uplink data, which is actually implemented by a virtual machine or a physical device, so the service network also needs to have the IP information, and there is an important step that the NAT device can smoothly send the uplink data to the service network: converting the IP information of the user equipment into IP information of a service network; therefore, after acquiring the uplink data, the NAT device converts the IP information of the user equipment in the uplink data into the IP information of the service network, the IP information conversion mode of the NAT device is preset, after acquiring the IP information of the service network, the NAT device sends the uplink data to the service network, after receiving the uplink data, the service network processes the uplink data to obtain downlink data, the downlink data needs to be fed back to the user equipment sending the uplink data, and since the downlink data received by the NAT device is sent by the service network, the downlink data certainly includes the IP information of the service network.
With reference to the second aspect of the present invention, the first embodiment of the second aspect, the second embodiment of the second aspect, or the third embodiment of the second aspect, in a fourth embodiment of the second aspect of the present invention, the system further includes: a load balancer LB;
the LB is used for acquiring uplink data of the user equipment through the access network equipment;
the LB is also used for determining a first forwarding function component in the forwarding function components according to a preset shunt table or randomly;
the LB is further used for sending the uplink data to the first forwarding functional component.
An access network device (e.g., a base station) will send uplink data sent by a user equipment to an LB, where the LB stores a dynamically changing offload Table, and a basic structure of the offload Table is (key, value). The value of the shunting according to the key can be configured according to different algorithms, and the corresponding value is the corresponding forwarding functional component; or, when there is no record in the shunt table, for example, when a certain key value appears for the first time, the forwarding functional components may also be randomly allocated; or, according to a preset specified policy, a specific forwarding functional component may be specified, which is not limited specifically.
In combination with the fourth embodiment of the second aspect of the present invention, in the fifth embodiment of the second aspect of the present invention,
the first forwarding functional component is further configured to receive uplink data of the user equipment sent by the LB, where the uplink data is in a data packet format;
the first forwarding function component further to determine whether a user session of the user equipment exists;
the first forwarding functional component is further configured to send the uplink data to the NAT device when a user session of the user equipment exists;
the first forwarding functional component is further configured to, when a user session of the user equipment does not exist, access the session management functional component, and determine whether the user session of the user equipment exists in the session management functional component;
the first forwarding functional component is further configured to, when the session management functional component has the user session of the user equipment, obtain the user session of the user equipment in the session management functional component, and send the uplink data to the NAT device;
the first forwarding functional component is further configured to delete the uplink data when the session management functional component does not have the user session of the user equipment.
The first forwarding functional component acquires uplink data of user equipment reported by a base station, the base station can be multiple, the number of the user equipment in a cell covered by the base station is within a range which can be borne by the base station, the specific number of the user equipment is not limited, the acquired uplink data of the user equipment is sent to the NAT equipment, the NAT equipment sends the uplink data to a service network after receiving the uplink data sent by the first forwarding functional component, the service network can feed back the uplink data after receiving the uplink data, the NAT equipment receives downlink data fed back by the service network according to the uplink data, and the downlink data naturally comprises IP information of the service network due to the fact that the equipment in different network segments has different IP information. After receiving the downlink data, the NAT device needs to send the downlink data to the user equipment, and the downlink data only can serve the IP information of the network from the terminal, so that the downlink data cannot be sent to the user equipment under the condition that the IP information of the user equipment cannot be determined, and the IP information of the service network needs to be converted into the IP information of the user equipment, and a specific conversion process is a preset conversion rule, so that the existing NAT technology can be implemented. The NAT device can determine which subnet the downlink data needs to be sent through according to the IP information of the user device, and when the forwarding functional component is set, one subnet segment generally corresponds to one forwarding functional component, so that the downlink data is sent to the second forwarding functional component according to the IP information of the user device. Since the second forwarding functional component itself stores the user session of the user equipment, or the user session of the user equipment can be obtained through other methods (for example, accessing the session management functional component), it can be determined according to the IP information of the user equipment which base station is located in the cell, and then after determining the target base station (i.e., target access network equipment) corresponding to the user equipment, the downlink data is sent to the target base station, and the base station sends the downlink data to the user equipment. Compared with the prior art, downlink data does not need to be sent to the access network equipment through the distributor, so that the time consumption in the downlink data transmission process is reduced; and the reduction of dispatchers may save virtual machine costs.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the embodiment and the drawings used in the description of the prior art.
Fig. 1 is a schematic diagram of a data transmission path of a conventional symmetric splitting system;
fig. 2 is a schematic diagram of a data transmission path of the asymmetric shunting system provided in the present application;
fig. 3 is a schematic diagram of Attach flow signaling provided in the present application;
fig. 4 is a schematic flowchart of an embodiment of a data transmission method provided in the present application;
fig. 5 is a schematic diagram of a data transmission path according to an embodiment of the data transmission method provided in the present application;
FIG. 6 is a schematic structural diagram of an embodiment of an asymmetric flow splitting system provided herein;
fig. 7 is a schematic structural diagram of another embodiment of an asymmetric flow splitting system provided by the present application.
Detailed Description
The application provides a data transmission method and an asymmetric shunt system, which reduce a downlink distributor in the existing symmetric shunt system, thereby reducing the time consumption in the downlink data transmission process and saving the virtual machine cost of the distributor.
The technical solutions in the present application will be clearly and completely described below with reference to the accompanying drawings in the present application.
First, a system architecture or scenario in which the present invention is applied will be briefly described.
The existing standard architecture based on NFV virtualizes the EPC, and an MME, an SGW, an HSS, a PGW, and the like in the EPC form a VNF, and after a control plane attachment procedure (Attach) of the EPC is completed, an air interface bearer of the VNF is established, an EPS bearer is then established, and a data transmission tunnel between an access network device and the SGW and the PGW is established. The NFV standard architecture is divided into two parts, service and management. The service aspect can be roughly divided into three layers: an I layer (Iaas), a P layer (Paas), and an S layer (Saas). Resources provided by the layer I are resources such as virtual machines, storage and networks, a layer P is a development and deployment platform of the application, and a layer S is provided for the application which is mainly provided for users in a Web network form. The scheme related to the invention is mainly implemented in the I layer.
As shown in fig. 2, a User Equipment (UE) accesses a telecommunication network or the Internet through an access network device (e.g., a base station eNB), where an MME and an HSS in fig. 2 have the same functions as network elements in the existing 3GPP standard, and it should be noted that only one UE and one eNB are given as an example in fig. 2, and there are many UEs in practical application.
A Load Balance (LB) is mounted on the data plane processing cluster. The eNB sends the uplink data sent by the ue to the LB, where a dynamically changing offload Table is stored in the LB, and the basic structure of the offload Table is (key, value). The value of the shunting according to the key can be configured according to different algorithms, the corresponding value is often the IP information of the corresponding gateway, and the result of shunting is to uniformly distribute the data traffic of the uplink data to the subsequent gateways, so as to ensure the load balance of each gateway. However, downlink data directly reach the eNB without passing through the LB, only one LB is given as an example in fig. 2, and in the case of a large number of user scales in practical application, the performance of a single LB is difficult to support, and multiple LBs are generally used for expansion. When the UE accesses the eNB, other procedures such as Attach procedure and data access service, etc. except handover are the same as the single LB.
The session management functional component is a network entity in which functions of the SGW and the PGW are merged and recombined, and is generally presented in a form of one component in a virtual machine, and the session management functional component is a session management entity of the SGW and the PGW and is responsible for interacting with an MME to create, modify, and delete a session of a user, and meanwhile, the forwarding functional component may also be configured, when uplink and downlink data transmission is separated, the session management functional component may respectively configure different forwarding functional components according to requirements of an uplink path and a downlink path, and operations such as establishment and modification of a user session are specifically shown in a signaling flow chart shown in fig. 3.
The forwarding function component is a forwarding function of the data plane, and maintains two (key, value) tables, the structures of which are (teid, session _ u) and (ip, session _ d), session _ u is used for searching and processing user sessions corresponding to uplink data, and session _ d is used for searching and processing user sessions corresponding to downlink data, if no user session exists in the (key, value) table, as shown in fig. 3, the forwarding function component can access the session management function component to obtain a recorded newly-constructed user session. Only the first forwarding functional component and the second forwarding functional component are shown in fig. 2, and in practical applications, there may be more than two forwarding functional components, each corresponding to one or more subnets.
The NAT equipment is used for distributing and routing the uplink data and the downlink data. Each route corresponds to an IP subnet segment, and an IP subnet segment contains IP information of a plurality of user equipments, for example, the IP information of the UE in fig. 2 is in the subnet 2, and in case of sufficient network resources, the NAT function is not necessary, but in the existing case, the number of users is huge, and the available IP resources of the network are in short supply.
The following describes a data transmission method applied to the above system architecture or scenario by an embodiment.
Referring to fig. 4, an embodiment of the present invention provides a data transmission method, including:
401. the first forwarding function component acquires uplink data of the user equipment and sends the uplink data to the NAT equipment;
in this embodiment, the first forwarding function component may obtain, through the LB, uplink data of the user equipment reported by the base station, where the number of the base stations may be multiple, and the number of the user equipment in the cell covered by the base station is within a range that the base station can bear, and the specific number of the user equipment is not limited, and the obtained uplink data of the user equipment is sent to the NAT device.
402. The NAT equipment sends the uplink data to a service network and receives downlink data fed back by the service network according to the uplink data;
in this embodiment, after receiving the uplink data sent by the first forwarding functional component, the NAT device sends the uplink data to the service network, and in a specific sending process, it is considered that the service requirement to be requested or implemented by the uplink data and the service requirement corresponding to the corresponding service network, for example, the uplink data of the bank transfer service needs to be sent to a financial network of a related bank.
403. The NAT equipment converts the IP information of the service network in the downlink data into the IP information of the user equipment;
in this embodiment, after receiving the downlink data, the NAT device needs to send the downlink data to the user equipment, and the downlink data only can serve the IP information of the network from the terminal, so that the downlink data cannot be sent to the user equipment under the condition that the IP information of the user equipment cannot be determined, the IP information of the service network needs to be converted into the IP information of the user equipment, a specific conversion process is a preset conversion rule, and the existing NAT technology can be implemented.
404. The NAT equipment sends the downlink data to the second forwarding functional component according to the IP information of the user equipment;
in this embodiment, the NAT device can determine, according to the IP information of the user equipment, which subnet the downlink data needs to be sent through, and when the forwarding functional component is set, one subnet segment generally corresponds to one forwarding functional component, so that the downlink data is sent to the second forwarding functional component according to the IP information of the user equipment.
405. And the second forwarding functional component determines the target access network equipment corresponding to the user equipment according to the IP information of the user equipment and sends the downlink data to the target access network equipment.
In this embodiment, since the second forwarding functional component itself stores the user session of the user equipment, or the user session of the user equipment can be obtained through other manners (for example, accessing the session management functional component), it may be determined, according to the IP information of the user equipment, which cell the base station is located in, and then after determining a target base station (i.e., target access network device) corresponding to the user equipment, the downlink data is sent to the target base station, and the base station sends the downlink data to the user equipment.
In the embodiment of the invention, the downlink data is sent to the forwarding functional component from the NAT equipment in the transmission process, and the forwarding functional component directly sends the downlink data to the access network equipment of the cell to which the user equipment belongs; and the reduction of dispatchers may save virtual machine costs.
It should be noted that, when the forwarding functional component is set, one subnet segment generally corresponds to one forwarding functional component, and the NAT device needs to route downlink data to the corresponding forwarding functional component according to the subnet segment in which the IP information of the user equipment is located. If each forwarding functional component or each user equipment corresponds to a route, the number of routes is very large, one forwarding functional component corresponds to one subnet section, information of the forwarding functional component and the corresponding subnet section is recorded in a routing table, and the asymmetric shunting system can complete the routes of a large number of user equipment with different IP information according to the recorded routing table.
Optionally, in some embodiments of the present invention, the asymmetric shunting system further includes a session management function component,
the second forwarding functional component determines a target access network device corresponding to the user equipment according to the IP information of the user equipment, and sends downlink data to the target access network device, including:
the second forwarding functional component accesses the session management functional component according to the IP information of the user equipment to obtain the user session of the user equipment;
the second forwarding functional component determines target access network equipment which establishes communication connection with the user equipment according to the user session of the user equipment;
and the second forwarding functional component sends the downlink data to the target access network equipment, so that the target access network equipment sends the downlink data to the user equipment.
In the embodiment of the present invention, the asymmetric offloading system further includes a session management function component, where the session management function component is a session management entity of the SGW and the PGW and is responsible for interacting with the MME to create, modify, and delete a session of a user, and therefore, the second forwarding function component accesses the session management function component according to the IP information of the user equipment to obtain a user session of the user equipment, and can determine, according to the user session, a target access network device that establishes a communication connection with the user equipment, that is, determine that the user equipment is located in a cell of a target base station, and the second forwarding function component only needs to send downlink data to the target access network device, and the target access network device can send the downlink data to the user equipment through a communication link. The detailed explanation shows that the distributor is not needed, and the issued data can be accurately sent to the user equipment.
Optionally, in some embodiments of the present invention, sending, by the NAT device, the downlink data to the second forwarding functional component according to the IP information of the user equipment includes:
the NAT equipment searches a second forwarding functional component corresponding to the IP information of the user equipment from the forwarding functional components according to the IP information of the user equipment;
and the NAT equipment sends the downlink data to the second forwarding functional component.
In the embodiment of the present invention, because the NAT device functions as a split routing function for uplink and downlink data, the NAT device is substantially classified according to IP information of different user devices, for example, a plurality of consecutive IP information are used as a subnet segment, and a route of each subnet is routed to one forwarding functional component, so that data is forwarded out.
Optionally, in some embodiments of the present invention, the uplink data includes IP information of the user equipment,
the NAT equipment sends the uplink data to the service network and receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprise IP information of the service network, and the method comprises the following steps:
NAT equipment converts IP information of user equipment in uplink data into IP information of a service network;
the NAT equipment sends the uplink data to the service network according to the IP information of the service network;
the NAT equipment receives downlink data fed back by the service network according to the uplink data, and the downlink data comprises IP information of the service network.
In the embodiment of the present invention, when the NAT device sends the uplink data to the service network, the problem of an IP packet of the uplink data needs to be considered, the IP packet is generated according to the IP information of the user equipment, and the service network processes the uplink data, which is actually implemented by a virtual machine or an entity device, so that the service network also needs to have IP information, the NAT device can smoothly send the uplink data to the service network, and an important step is that the NAT device converts the IP information of the user equipment into the IP information of the service network, receives downlink data fed back by the service network according to the uplink data, and the downlink data includes the IP information of the service network.
Optionally, in some embodiments of the present invention, the asymmetric flow splitting system further comprises an LB,
before the first forwarding functional component acquires uplink data of the user equipment, the method further includes:
LB obtains the uplink data of the user equipment through the access network equipment;
LB confirms the first forwarding function component in the forwarding function components according to the preset shunt table or random;
the LB sends the upstream data to the first forwarding function component.
An access network device (e.g., a base station) will send uplink data sent by a user equipment to an LB, where the LB stores a dynamically changing offload Table, and a basic structure of the offload Table is (key, value). The value of the shunting according to the key can be configured according to different algorithms, and the corresponding value is the corresponding forwarding functional component; or, when there is no record in the shunt table, for example, when a certain key value appears for the first time, the forwarding functional components may also be randomly allocated; or, according to a preset specified policy, a specific forwarding functional component may be specified, which is not limited specifically.
Optionally, in some embodiments of the present invention, the acquiring, by the first forwarding functional component, the uplink data of the user equipment, and sending the uplink data to the NAT device includes:
the first forwarding function component receives uplink data of the user equipment sent by the LB, and the uplink data is in a data packet format;
a first forwarding function component determines whether a user session of a user equipment exists;
if so, the first forwarding functional component sends the uplink data to the NAT equipment;
if not, the first forwarding function component accesses the session management function component and determines whether the session management function component has the user session of the user equipment;
if the session management functional component has the user session of the user equipment, the first forwarding functional component acquires the user session of the user equipment in the session management functional component and sends uplink data to the NAT equipment;
and if the session management functional component does not have the user session of the user equipment, the first forwarding functional component deletes the uplink data.
In the embodiment of the invention, after receiving the uplink data, the first forwarding functional component needs to decode the uplink data in the data packet format before sending the uplink data to the NAT equipment, if the uplink data can be decoded, the first forwarding functional component indicates that a user session of the user equipment exists, and sends the uplink data to the NAT equipment; if the user session of the user equipment does not exist, the first forwarding functional component accesses the session management functional component, and if the user session of the user equipment exists in the session management functional component, the first forwarding functional component acquires the user session of the user equipment in the session management functional component and sends uplink data to the NAT equipment; if the session management functional component does not have the user session of the user equipment, the uplink data is an error data packet, and the first forwarding functional component in the general processing mode deletes the uplink data.
The above embodiment describes a data transmission method applied to an asymmetric shunting system, and the following description is given by using a specific embodiment, as follows:
as shown in fig. 5, in the NFV scenario, in an implementation scenario of a small number of user sizes (<20W), it is assumed that an access network is the Internet, one LB, one session management function component GW _ C, three forwarding function components GW _ PF3, and a NAT device, and other network elements are implemented by using virtual machines.
1. And starting a reasonable number of virtual machines VNF to complete the configuration of the MME, the HSS, the GW _ C, the forwarding functional components GW _ PF and LB and the NAT equipment according to the specification of the virtual machines, the number scale of users and the expectation of user flow. The method comprises subnet routing, IP allocation management, IP of each network element and corresponding port number and the like;
2. starting a business processing process related to MME, HSS, GW _ C and GW _ PF;
3. the mobile phone accesses the eNB1 according to the Attach flow, and the IP information distributed to the mobile phone by GW _ C is 192.168.0.2, and the teid is 3;
4. when the mobile phone 1 performs data access, the data packet is shunted through the LB. Because the data packet is the first data packet, assuming that a uniform random strategy is adopted, the LB distributes the data packet to GW _ PF2, then stores the IP of GW _ PF2 in a table, assuming that the corresponding key is the teid distributed by GW _ C, the table is (teid, GW _ PF _ IP), and each data packet of the mobile phone 1 is distributed to GW _ PF2 later;
5. the GW _ PF2 forwards the data to the NAT, and the NAT converts the data packet of the IP information '192.168.0.2' of the mobile phone into the data packet of the IP information '221.220.128.127' of the public network. The data returned by the internet is converted into the IP information '192.168.0.2' by the NAT. Assuming that the NAT routes the data of the subnet 192.168.0.x/24 to GW _ PF3, GW _ PF3 may start handset session reconstruction, and then directly forward the data to the corresponding base station eNB1 according to the session information;
6. when a large number of mobile phones are accessed, if the corresponding GW _ PF1 load on a certain subNet sub Net1 is too heavy and the GW _ PF2 load is very light, the subNet sub Net1 can be divided into two Net1/Net2, the corresponding Net1 route to GW _ PF1 is unchanged, the corresponding Net2 route to GW _ PF2 is unchanged, and other parts of the system do not need to be additionally configured.
It should be noted that, when the mobile phone is handed over (Handover), the data plane session does not need to be migrated.
(1) The signaling of the control plane follows the processing procedure similar to the Attach procedure, and no matter the handover is X2 handover or S1 handover, the MME sends ModifyBearerRequest to send the information of the new base station to which the mobile phone is connected to GW _ C, and then modifies the relevant sessions on all GW _ PFs where the corresponding mobile phone sessions are located.
(2) After the switching process is completed, when the mobile phone is switched from one base station to another base station, and the uplink data flow passes through the LB, the key values teid are the same, so that the data can be routed to the same GW, and when the data is down, the GW routes the data to the base station to which the mobile phone is currently connected. The above process ensures that the service is not interrupted and the session is not migrated in the mobile phone switching process.
If the performance of a single LB is difficult to support with a large number of user scales, multiple LBs are used for expansion. When the mobile phone accesses the base station, other processes such as Attach process, data access service, etc. are the same as a single LB except for handover. The switching is divided into two types: intra LB cluster switching and inter LB cluster switching. Switching in the LB cluster: the Attach and switching process of the handset in the LB cluster is unchanged. Switching among LB clusters: when a handset switches from one cluster LB1 to another cluster LB2, without additional action, LB2 automatically adds a new route to forward data to GW _ PF in its cluster according to a specified algorithm. Like the standard operation, if there is no session of the mobile phone in GW _ PF, GW _ PF reads the session from GW _ C to reconstruct, and GW _ PF on the uplink and downlink path automatically reconstructs the user session. GW _ PF reports the position to GW _ C.
The foregoing embodiment describes a data transmission method, and an asymmetric shunting system is described below by way of an embodiment.
Referring to fig. 6, an embodiment of the invention provides an asymmetric shunt system, including:
a first forwarding function component 601, configured to obtain uplink data of a user equipment, and send the uplink data to a network address translation NAT device;
the NAT device 602 is configured to send the uplink data to the service network, and receive downlink data fed back by the service network according to the uplink data, where the downlink data includes network protocol IP information of the service network;
the NAT device 602 is further configured to convert IP information of the service network in the downlink data into IP information of the user equipment;
the NAT device 602 is further configured to send the downlink data to the second forwarding functional component according to the IP information of the user equipment;
the second forwarding functional component 603 is configured to determine, according to the IP information of the user equipment, a target access network device corresponding to the user equipment, and send the downlink data to the target access network device.
In the embodiment of the invention, compared with the prior art, the downlink data does not need to be sent to the access network equipment through the distributor, thereby reducing the time consumption in the transmission process of the downlink data; and the reduction of dispatchers may save virtual machine costs.
Optionally, as shown in fig. 7, in some embodiments of the present invention, the system further includes: a session management function component 604;
a session management function component 604 for recording user sessions of the user devices;
the second forwarding functional component 603 is further configured to access the session management functional component 604 according to the IP information of the user equipment, so as to obtain a user session of the user equipment;
the second forwarding functional component 603 is further configured to determine, according to the user session of the user equipment, a target access network device that establishes a communication connection with the user equipment;
the second forwarding functional component 603 is further configured to send the downlink data to the target access network device, so that the target access network device sends the downlink data to the user equipment.
In the embodiment of the present invention, the session management function component 604 is a session management entity of the SGW and the PGW, and is responsible for interacting with the MME to create, modify, and delete a session of a user, so that the second forwarding function component 603 accesses the session management function component 604 according to the IP information of the user equipment to obtain the user session of the user equipment, and can determine a target access network device that establishes a communication connection with the user equipment according to the user session, that is, determine that the user equipment is located in a cell of a target base station, and the second forwarding function component 603 only needs to send downlink data to the target access network device, so that the target access network device can send the downlink data to the user equipment through a communication link. The detailed explanation shows that the distributor is not needed, and the issued data can be accurately sent to the user equipment.
Alternatively, in some embodiments of the present invention,
the NAT device 602 is further configured to search, according to the IP information of the user equipment, a second forwarding functional component corresponding to the IP information of the user equipment from the forwarding functional components;
the NAT device 602 is further configured to send the downlink data to the second forwarding functional component.
In the embodiment of the present invention, because the NAT device 602 functions as a split routing function for uplink and downlink data, the NAT device is substantially classified according to IP information of different user devices, for example, a plurality of consecutive IP information are used as a subnet segment, and a route of each subnet is routed to one forwarding functional component, so that data is forwarded out, then according to the IP information of the user device, the second forwarding functional component 603 can be determined, and the NAT device 602 sends downlink data to the second forwarding functional component 603, and when the NAT device 602 splits downlink data, a distributor is also not needed.
Optionally, in some embodiments of the present invention, the uplink data includes IP information of the user equipment,
the NAT device 602 is further configured to convert IP information of the user equipment in the uplink data into IP information of the service network;
the NAT device 602 is further configured to send uplink data to the service network according to the IP information of the service network;
the NAT device 602 is further configured to receive downlink data fed back by the service network according to the uplink data, where the downlink data includes IP information of the service network.
In the embodiment of the present invention, when the NAT device 602 sends the uplink data to the service network, the problem of an IP packet of the uplink data needs to be considered, the IP packet is generated according to the IP information of the user equipment, and the service network processes the uplink data, which is actually implemented by a virtual machine or an entity device, so that the service network also needs to have IP information, the NAT device 602 can smoothly send the uplink data to the service network, and an important step is that the NAT device 602 receives downlink data fed back by the service network according to the uplink data, where the downlink data includes the IP information of the service network.
Optionally, as shown in fig. 7, in some embodiments of the present invention, the system further includes: a load balancer LB 605;
LB605, configured to obtain uplink data of a user equipment through an access network device;
LB605, further used for determining a first forwarding function component 601 in the forwarding function components according to a preset shunt table or randomly;
LB605, further configured to send uplink data to first forwarding functional component 601.
In the embodiment of the present invention, an access network device (e.g., a base station) sends uplink data sent by a user equipment to an LB605, where a dynamically changing offload Table is stored in the LB605, and a basic structure of the offload Table is (key, value). The value of the shunting according to the key can be configured according to different algorithms, and the corresponding value is the corresponding forwarding functional component; or, when there is no record in the shunt table, for example, when a certain key value appears for the first time, the forwarding functional components may also be randomly allocated; or, according to a preset specified policy, a specific forwarding functional component may be specified, which is not limited specifically.
Alternatively, as shown in fig. 7, in some embodiments of the invention,
the first forwarding functional component 601 is further configured to receive uplink data of the user equipment sent by the LB605, where the uplink data is in a data packet format;
a first forwarding function component 601, further configured to determine whether a user session of the user equipment exists;
the first forwarding function component 601 is further configured to send uplink data to the NAT device 602 when a user session of the user equipment exists;
a first forwarding function component 601, further configured to, when there is no user session of the user equipment, access a session management function component 604, and determine whether there is a user session of the user equipment in the session management function component;
the first forwarding functional component 601 is further configured to, when a session management functional component has a user session of a user equipment, obtain the user session of the user equipment in the session management functional component 604, and send uplink data to the NAT device 602;
the first forwarding function component 601 is further configured to delete the uplink data when the session management function component 604 does not have the user session of the user equipment.
In the embodiment of the present invention, after receiving uplink data, before sending the uplink data to NAT device 602, first forwarding functional component 601 needs to decode the uplink data in the data packet format, and if the uplink data can be decoded, it indicates that a user session of the user equipment exists, and first forwarding functional component 601 sends the uplink data to NAT device 602; if the user session of the user equipment does not exist, the first forwarding function component 601 accesses the session management function component 604, and if the user session of the user equipment exists in the session management function component 604, the first forwarding function component 601 acquires the user session of the user equipment in the session management function component 603 and sends uplink data to the NAT device 602; if the session management function component 604 does not have the user session of the user equipment, the uplink data is an error packet, and the first forwarding function component 601 in the general processing mode deletes the uplink data, which may be in another mode without limitation.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A data transmission method is applied to an asymmetric distribution system, the asymmetric distribution system comprises at least two forwarding functional components and Network Address Translation (NAT) equipment, and the method is characterized by comprising the following steps:
a first forwarding function component acquires uplink data of user equipment and sends the uplink data to the NAT equipment;
the NAT equipment sends the uplink data to a service network and receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises network protocol IP information of the service network;
the NAT equipment converts the IP information of the service network in the downlink data into the IP information of the user equipment;
the NAT equipment sends the downlink data to a second forwarding functional component according to the IP information of the user equipment;
the second forwarding functional component determines a target access network device corresponding to the user equipment according to the IP information of the user equipment, and sends the downlink data to the target access network device;
the asymmetric breakout system further comprises a session management function component,
the second forwarding functional component determines a target access network device corresponding to the user equipment according to the IP information of the user equipment, and sends the downlink data to the target access network device, including:
the second forwarding functional component accesses the session management functional component according to the IP information of the user equipment to obtain the user session of the user equipment;
the second forwarding functional component determines target access network equipment which establishes communication connection with the user equipment according to the user session of the user equipment;
and the second forwarding functional component sends the downlink data to the target access network equipment, so that the target access network equipment sends the downlink data to the user equipment.
2. The data transmission method according to claim 1, wherein the sending, by the NAT device, the downlink data to the second forwarding functional component according to the IP information of the user equipment includes:
the NAT equipment searches a second forwarding functional component corresponding to the IP information of the user equipment from the forwarding functional components according to the IP information of the user equipment;
and the NAT equipment sends the downlink data to the second forwarding functional component.
3. The data transmission method according to claim 1, wherein the uplink data includes IP information of the UE,
the NAT device sends the uplink data to a service network, and receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises IP information of the service network, and the method comprises the following steps:
the NAT equipment converts the IP information of the user equipment in the uplink data into IP information of a service network;
the NAT equipment sends the uplink data to the service network according to the IP information of the service network;
and the NAT equipment receives downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises IP information of the service network.
4. The data transmission method according to any one of claims 1 to 3, wherein the asymmetric shunting system further comprises a load balancer LB,
before the first forwarding functional component acquires uplink data of the user equipment, the method further includes:
the LB acquires the uplink data of the user equipment through the access network equipment;
the LB determines a first forwarding function component in the forwarding function components according to a preset shunt table or randomly;
the LB sends the uplink data to the first forwarding function component.
5. The data transmission method according to claim 4, wherein the first forwarding function component acquires uplink data of a user equipment and sends the uplink data to the NAT device, and the method includes:
a first forwarding function component receives uplink data of the user equipment sent by the LB, wherein the uplink data is in a data packet format;
the first forwarding function component determining whether a user session of the user equipment exists;
if so, the first forwarding function component sends the uplink data to the NAT equipment;
if not, the first forwarding functional component accesses the session management functional component and determines whether the session management functional component has the user session of the user equipment;
if the session management functional component has the user session of the user equipment, the first forwarding functional component acquires the user session of the user equipment in the session management functional component and sends the uplink data to the NAT equipment;
and if the session management functional component does not have the user session of the user equipment, the first forwarding functional component deletes the uplink data.
6. An asymmetric flow splitting system, comprising:
the first forwarding functional component is used for acquiring uplink data of the user equipment and sending the uplink data to the NAT equipment;
the NAT device is used for sending the uplink data to a service network and receiving downlink data fed back by the service network according to the uplink data, wherein the downlink data comprises network protocol IP information of the service network;
the NAT device is further configured to convert the IP information of the service network in the downlink data into the IP information of the user equipment;
the NAT equipment is also used for sending the downlink data to a second forwarding functional component according to the IP information of the user equipment;
the second forwarding functional component is configured to determine, according to the IP information of the user equipment, a target access network device corresponding to the user equipment, and send the downlink data to the target access network device;
the system further comprises: a session management function component;
the session management function component is used for recording the user session of the user equipment;
the second forwarding functional component is further configured to access the session management functional component according to the IP information of the user equipment, so as to obtain a user session of the user equipment;
the second forwarding functional component is further configured to determine, according to the user session of the user equipment, a target access network device that establishes a communication connection with the user equipment;
the second forwarding functional component is further configured to send the downlink data to the target access network device, so that the target access network device sends the downlink data to the user equipment.
7. The asymmetric flow splitting system of claim 6,
the NAT device is further configured to search a second forwarding function component corresponding to the IP information of the user equipment from the forwarding function component according to the IP information of the user equipment;
the NAT device is further configured to send the downlink data to the second forwarding functional component.
8. The asymmetric tapping system as claimed in claim 6, wherein the uplink data includes IP information of the UE,
the NAT device is further configured to convert the IP information of the user equipment in the uplink data into IP information of a service network;
the NAT equipment is further used for sending the uplink data to the service network according to the IP information of the service network;
the NAT device is further configured to receive downlink data fed back by the service network according to the uplink data, where the downlink data includes IP information of the service network.
9. The asymmetric flow distribution system of any of claims 6 to 8, further comprising: a load balancer LB;
the LB is used for acquiring uplink data of the user equipment through the access network equipment;
the LB is also used for determining a first forwarding function component in the forwarding function components according to a preset shunt table or randomly;
the LB is further used for sending the uplink data to the first forwarding functional component.
10. The asymmetric flow splitting system of claim 9,
the first forwarding functional component is further configured to receive uplink data of the user equipment sent by the LB, where the uplink data is in a data packet format;
the first forwarding function component further to determine whether a user session of the user equipment exists;
the first forwarding functional component is further configured to send the uplink data to the NAT device when a user session of the user equipment exists;
the first forwarding functional component is further configured to, when a user session of the user equipment does not exist, access the session management functional component, and determine whether the user session of the user equipment exists in the session management functional component;
the first forwarding functional component is further configured to, when the session management functional component has the user session of the user equipment, obtain the user session of the user equipment in the session management functional component, and send the uplink data to the NAT device;
the first forwarding functional component is further configured to delete the uplink data when the session management functional component does not have the user session of the user equipment.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105491617A (en) * 2015-12-03 2016-04-13 北京北方烽火科技有限公司 Method for supporting local offloading of business and base station sub-system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002353276A1 (en) * 2001-12-06 2003-06-17 Nokia Corporation A mechanism to create pinhole for existing session in middlebox
US20060268890A1 (en) * 2005-05-31 2006-11-30 Audiocodes Ltd. Method circuit and system for remotely updating a network appliance
CN102196404B (en) * 2010-03-11 2013-09-11 电信科学技术研究院 Method, system and device for sending data
CN102143601B (en) * 2010-12-20 2014-11-05 华为技术有限公司 Broadband access processing method, radio access network (RAN) and communication system
CN102833682B (en) * 2011-06-14 2018-04-27 中兴通讯股份有限公司 Information acquisition method, apparatus and system
CN105722152A (en) * 2016-02-25 2016-06-29 华中科技大学 Heterogeneous network data parallel transmission system and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105491617A (en) * 2015-12-03 2016-04-13 北京北方烽火科技有限公司 Method for supporting local offloading of business and base station sub-system

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