WO2011110022A1

WO2011110022A1 - Method, device and system for transmitting data

Info

Publication number: WO2011110022A1
Application number: PCT/CN2010/077451
Authority: WO
Inventors: 周汉; 吴问付
Original assignee: 华为技术有限公司
Priority date: 2010-09-29
Filing date: 2010-09-29
Publication date: 2011-09-15
Also published as: CN102318436B; CN102318436A

Abstract

A method, a device and a system for transmitting data are provided by the embodiments of the present invention. Said method includes: the first network element obtains the relationship between the identifier of a user equipment (UE) and the username of the UE; according to the first connection corresponding to the identifier of the UE and the second connection corresponding to the username of the UE, said first network element transmits the data of the UE.

Description

Data transmission method, device and system

The present invention relates to communication technologies, and in particular, to a data transmission method, apparatus, and system. Background technique

In the application of machine-to-machine (M2M) communication, which can also be called Machine Type Communication (MTC), there are a large number of user equipments (User Equipments, UEs for short) that use low data traffic applications. MTC Device (MTC Device). The existing data transmission can be carried out in two ways, one is to use the bearer transmission mode of the packet domain, and the other is to use short message (SMS) transmission. When the user equipment initiates a service connection establishment, the network needs to establish a bearer for the user equipment. When the user equipment transitions from the idle state to the connected state, the network needs to restore the bearer for the user equipment. When the user equipment performs the service connection release, the network needs to be released for the user equipment. The latter uses the Mobile Station International Integrated Services Digital Network Number (MSISDN) for routing and addressing. The network needs to allocate MSISDNL to the user equipment.

If the low-data traffic is transmitted in the bearer mode, the bearer occupies a large amount of network bandwidth resources, and the corresponding bearer operation process leads to an increase in signaling interaction on the network side. If the low-data traffic service is transmitted in the SMS mode, the network needs to be a large number. The user equipment allocates MSISDN, which leads to a shortage of MSISDN, and its transmission delay is large, and the transmission is unstable, thus affecting the transmission quality of low data traffic services. Summary of the invention

The embodiments of the present invention provide a data transmission method, device, and system, which are used to save network bandwidth resources and reduce signaling interaction with the network side.

The embodiment of the invention provides a data transmission method, including: Obtaining a correspondence between the identifier of the user equipment and the user name of the user equipment; transmitting the first connection according to the first connection corresponding to the identifier of the user equipment and the second connection corresponding to the user name of the user equipment User device data.

The embodiment of the invention further provides a data transmission device, including:

a learning module, configured to learn a correspondence between an identifier of the user equipment and a user name of the user equipment;

And a transmission module, configured to transmit data of the user equipment according to a first connection corresponding to the identifier of the user equipment and a second connection corresponding to a username of the user equipment.

The embodiment of the invention further provides a data transmission system, including

a first network element, configured to learn a correspondence between a user name of the user equipment and an identifier of the user equipment, according to the first connection corresponding to the identifier of the user equipment and the second connection corresponding to the user name of the user equipment Transmitting data of the user equipment.

According to the foregoing technical solution, the embodiment of the present invention can obtain the first connection corresponding to the identifier of the user equipment and the learned user equipment according to the correspondence between the identifier of the user equipment and the user name of the user equipment. The second connection corresponding to the user name transmits the data of the user equipment, thereby optimizing the transmission mode of the user equipment, effectively saving network bandwidth resources, and reducing signaling interaction with the network side. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flowchart of a data transmission method according to Embodiment 1 of the present invention;

2 is a schematic flowchart of a data transmission method according to Embodiment 2 of the present invention;

3 is a schematic flowchart of a data transmission method according to Embodiment 3 of the present invention; 4 is a schematic flowchart of a data transmission method according to Embodiment 4 of the present invention; FIG. 5 is a schematic structural diagram of a data transmission apparatus according to Embodiment 5 of the present invention;

FIG. 6 is a schematic structural diagram of a data transmission system according to Embodiment 6 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a schematic flowchart of a data transmission method according to Embodiment 1 of the present invention. The first network element in this embodiment may be a single new network element, for example, an MTC proxy (MTC Proxy) or an M2M platform, or It can also be integrated with existing network elements to be integrated into existing network elements as a function module, for example: Proxy Call Session Control Function (P-CSCF) entity. As shown in FIG. 1, the data transmission method in this embodiment may include the following steps:

Step 101: The first network element learns the correspondence between the identifier of the user equipment and the user name of the user equipment.

The identifier of the user equipment may include an International Mobile Subscriber Identification Number (IMSI), an International Mobile Equipment Identity (IM), or other identifiers that may be used to identify the user equipment. For example, the connection number used to identify the connection of the user equipment. The user name of the user equipment may include a Uniform Resource Identifier (URI), a Uniform Resource Locator (URL), or other The identifier of the user name as the user device.

In this step, the specific method for the first network element to learn the correspondence between the identifier of the user equipment and the user name of the user equipment may include, but is not limited to, the following methods: A. If the user equipment supports the IP Multi-media Subsystem (IMS)/Session Initiation Protocol (SIP) protocol stack, for example, the user equipment supports the IMS/SIP client, then the user The device may notify the first network element of the user name of the user equipment, and the mobile management device notifies the first network element of the identifier of the user equipment, or the user equipment may notify the first network element of the user name of the user equipment and the identifier of the user equipment.

Specifically, the user equipment may send a notification message to the first network element, for example, a registration request (Register Request) message, where the notification message includes a user name of the user equipment. The user equipment may first send the foregoing notification message to the mobility management device, where the notification message may be included as a cell in a Non Access Stratum (NAS) message sent by the user equipment to the mobility management device, for example: an attach request. (Attach Request) in the message. The mobile management device sends the notification message included in the NAS message to the first network element. For example, the mobility management device sends a connection setup request (Connection Setup Request) message to the first network element, where the connection establishment request message includes the foregoing notification. Message. The first network element receives the notification message, and the user name of the user equipment can be obtained from the notification message.

After the mobile management device receives the notification message sent by the user equipment, the mobility management device may send the notification message and the identifier of the user equipment to the first network element, for example, the mobility management device sends a connection establishment request to the first network element (Connection Setup) The message is that the foregoing connection establishment request message includes the foregoing notification message and the identifier of the user equipment. Specifically, the mobile management device learns that the identifier of the user equipment can be obtained according to a method of the prior art, for example, a NAS message sent by the mobile management device from the user equipment, for example, an Attach Request message, where the identifier of the user equipment is obtained, or The identifier of the user equipment is obtained from the context of the user equipment, and details are not described herein again.

Alternatively, the notification message may further include an identifier of the user equipment, where the first network element receives the notification message, and the identifier of the user equipment may be obtained from the notification message.

The first network element can learn the identity of the user equipment and the user name of the user equipment, so that the first network element learns the correspondence between the identifier of the user equipment and the user name of the user equipment. B. If the user equipment does not support the IMS/SIP protocol stack, for example, the user equipment does not support the IMS/SIP client, the mobility management device may notify the first network element of the identifier of the user equipment and the user name of the user equipment.

For example, the mobility management device sends a connection setup request (Connection Setup Request) message to the first network element, where the connection establishment request message includes the identifier of the user equipment and the user name of the user equipment. Specifically, the method for the mobile management device to learn the identifier of the user equipment and the user name of the user equipment may be: a NAS message sent by the mobility management device from the user equipment, for example, an Attach Request, or the user is informed in the context of the user equipment. The identifier of the device, and then the mobile management device learns the user name of the user device from the subscription data of the user device, for example: the mobile management device to the subscription database, for example: Home Location Register (HLR) / Home Subscriber Server (Home) The Subscriber Server (HSS for short) sends an Update Location Request message, and the subscription database returns an Update Location Response message to the mobility management device, where the update location response message includes the user name of the user equipment.

Optionally, the mobility management device may choose to notify the first network element of the identifier of the user equipment or may also notify the first network element of the identifier of the user equipment and the user name of the user equipment. Specifically, after receiving the NAS message of the user equipment, the mobility management device may select to notify the first network element of the identifier of the user equipment or select to notify the first network element of the identifier of the user equipment and the user equipment according to the following two methods: Username:

The mobile management device may notify the first network element of the identifier of the user equipment according to the application feature of the user equipment (MTC Feature) or notify the first network element of the identifier of the user equipment and the user name of the user equipment. For example, the mobile management device learns from the subscription data that the application feature of the user equipment is a small data amount usage type or the user equipment has a triggering terminal initiated service (MTC Device Trigger) feature, and the mobile management device learns the user equipment. After the identifier of the user equipment and the user name of the user equipment are identified, the mobile management device sends a message to the first network element, and notifies the identifier of the user equipment or the identifier of the user equipment and the user name of the user equipment to the first network. Yuan.

The mobile management device may be based on the group identifier of the group to which the user equipment belongs, for example: an IMSI/IM nickname segment, an access point name (APN), and an identifier of the group to which the user equipment belongs (the MTC Group ID). And so on, notifying the first network element of the identifier of the user equipment or notifying the first network element of the identifier of the user equipment and the user name of the user equipment. For example, the mobile management device needs to notify the first network element of the identifier of the user equipment or notify the first network element of the identifier of the user equipment and the group identifier of the user name of the user equipment, if the mobile management device learns The user equipment belongs to the group, for example: the mobile management device learns that the IMSI/IM of the user equipment belongs to the IMSI/IM nickname segment, or the mobility management device learns that the APN used by the user equipment is the same as the APN, or the mobility management device If the MTC Group ID of the user equipment is the same as the MTC Group ID, the mobility management device sends a message to the first network element, and notifies the identifier of the user equipment or the identifier of the user equipment and the user name of the user equipment to the first network element. .

Through the method described above, the first network element can learn the identifier of the user equipment and the user name of the user equipment, so that the first network element learns the relationship between the identifier of the user equipment and the user name of the user equipment.

Further, in the process that the user equipment notifies the first network element of the identifier of the user equipment and the user name of the user equipment by using the mobility management device, and the mobile management device notifies the first network element of the identifier of the user equipment or the user equipment In the process of identifying the user name of the user equipment, the mobile management device and the first network element simultaneously establish a connection corresponding to the identifier of the user equipment for the user equipment.

Further, in this embodiment, the user equipment notifies the first network element of the identifier of the user equipment and the user name of the user equipment by using the mobility management device, and the mobility management device notifies the first network element of the identifier of the user equipment or Before the first network element is notified of the identifier of the user equipment and the user name of the user equipment, the foregoing mobility management device also needs to know the information of the first network element, for example: the IP address of the first network element or the fully qualified domain name (Fully Qualified Domain Names) , referred to as FQDN). Specifically, the mobility management device can obtain information about the first network element by: The mobile management device can learn the information of the first network element from the subscription data of the user equipment. Specifically, the information of the first network element can be signed in the subscription data of the user equipment, and the user equipment accesses the mobility management. After the device, the mobility management device sends an update location request (Update Location Request) message to the subscription database, for example: HLR/HSS, and the subscription database returns an Update Location Response message to the mobility management device, in the update location response message. The information including the first network element described above.

The mobile management device can learn the information of the first network element according to the group identifier of the group to which the user equipment belongs.

Specifically, the information of the corresponding first network element may be configured according to the group identifier of the group to which the user equipment belongs. After the mobile management device learns the group identifier of the group to which the user equipment belongs, if the mobile management device knows that the user equipment belongs to the group, for example: the mobile management device knows that the IMSI/IM of the user equipment belongs to the IMSI/IM nickname segment, or The mobile management device learns that the APN used by the user equipment is the same as the foregoing APN, or the mobility management device learns that the MTC Group ID of the user equipment is the same as the foregoing MTC Group ID, and the mobility management device can learn the information of the first network element according to the group identifier. For example, the mobility management device queries the configuration information to obtain information about the first network element corresponding to the group identifier according to the group identifier.

c. The mobility management device can learn the information of the first network element according to the APN of the user equipment. Specifically, the mobility management device may query the first network element corresponding to the APN by using a domain name system (DNS) server according to the APN of the user equipment, so as to obtain information about the first network element, for example: The network element and the gateway device, for example, the Packet Data Network Gateway (P-GW) and the Gateway General Packet Radio Service (GPRS) support node (Gateway GPRS Supporting Node, GGSN for short) are The first network element that is configured in a unified manner, the mobility management device can query the DNS server for information about the gateway device according to the APN of the user equipment, so as to obtain the information of the first network element.

Through the method described above, the mobility management device can learn the information of the first network element, and then Notifying the first network element of the identifier of the user equipment or notifying the first network element of the identifier of the user equipment and the user name of the user equipment.

Further, when the user equipment moves to cause the mobility management device to change, the connection between the target side mobile management device and the first network element needs to be established for the user equipment. The method for establishing the connection between the target mobile management device and the first network element may refer to the process in which the mobility management device notifies the first network element of the identifier of the user equipment and the user name of the user equipment, and the mobility management device establishes a connection with the first network element. Methods.

The embodiment also needs to notify the application server (MTC Server), for example, a Serving Call Session Control Function (S-CSCF) entity, to notify the user device of the user name. Specifically, the application server may be notified of the user name of the user equipment by:

A. If the foregoing user equipment supports the IMS/SIP protocol stack, for example, the user equipment supports the IMS/SIP client, the user equipment may notify the application server of the user name of the user equipment;

Specifically, the user equipment may send a notification message to the application server, for example, a registration request (Register Request) message, where the notification message includes a user name of the user equipment. The user equipment may first send the foregoing notification message to the first network element, for example, the user equipment may first send the NAS message encapsulating the notification message to the mobility management device, and after receiving the NAS message, the mobility management device passes the first The connection established between the network elements sends the received notification message to the first network element, for example, the mobility management device sends a relay message to the first network element, where the relay message includes the foregoing notification. Message. After receiving the notification message, the first network element sends the notification message to the application server. The application server receives the notification message, and the user name of the user equipment can be obtained from the notification message.

B. If the user equipment does not support the IMS/SIP protocol stack, for example, the user equipment does not support the IMS/SIP client, and the first network element notifies the application server of the user name of the user equipment.

Specifically, after the first network element knows the user name of the user equipment, the first network element may notify the application server of the user name of the user equipment. For example, the first network element may send a notification message to the application server. For example: a Register Request message, the notification message contains the user name of the user device.

Through the above two methods, the application server knows that the user name of the user equipment, that is, a network element, registers the user name of the user equipment to the application server. Further, in the process that the first network element notifies the application server of the user name of the user equipment, the first network element and the application server simultaneously establish the user equipment with the user equipment. The connection corresponding to the username.

Further, in this embodiment, before the first network element notifies the application server of the user name of the user equipment, the first network element further needs to obtain information about the application server, for example, an application server's IP address or FQDN. Specifically, the first network element can obtain information about the application server by:

a mobile management device may notify the first network element of the information of the application server;

Specifically, after the user equipment accesses the mobility management device, the mobility management device sends an update location request (Update Location Request) message to the subscription database, for example: HLR/HSS, and the subscription database returns an update location response to the mobility management device (Update Location Response message: The update location response message includes subscription data of the user equipment, and the subscription data includes information of the application server. The mobility management device sends the information of the application server learned from the subscription data to the first network element. For example, the mobility management device sends a connection setup request (Connection Setup Request) message to the first network element, where the connection establishment request message includes Information about the above application server.

b. The first network element may obtain the information of the application server according to the group identifier of the group to which the user equipment belongs.

Specifically, the information of the corresponding application server may be configured according to the group identifier of the group to which the user equipment belongs. After the first network element learns the group identifier of the group to which the user equipment belongs, if the first network element learns that the user equipment belongs to the group, for example, the first network element learns that the IMSI/IM of the user equipment belongs to the IMSI/IM. The apostrophe segment, or the first network element, knows that the APN used by the user is the same as the APN, or the first network element learns the MTC Group ID of the user equipment and the foregoing MTC. If the group ID is the same, the first network element can learn the information of the application server according to the group identifier. For example, the first network element queries the configuration information according to the group identifier to obtain information about the application server corresponding to the group identifier.

Through the method described above, the first network element can learn the information of the application server, and then can notify the application server of the user name of the user equipment.

Step 102: The first network element transmits data of the user equipment according to the first connection corresponding to the identifier of the user equipment and the second connection corresponding to the user name of the user equipment.

The first connection is a connection between the first network element and the mobility management device, and corresponds to the identifier of the user equipment, that is, the first connection can be found according to the identifier of the user equipment, and according to the first connection, Determining the identity of the user equipment; the second connection is a connection between the first network element and the application server, corresponding to the user name of the user equipment, that is, the second connection can be found according to the user name of the user equipment. The user name of the user equipment can also be determined according to the second connection.

The following steps will be described in detail according to the uplink data (the user equipment sends data to the application server) and the downlink data (the application server sends data to the user equipment).

A, uplink data transmission;

If the user equipment supports the IMS/SIP protocol stack, for example, the user equipment supports the IMS/SIP client, the user equipment may encapsulate the uplink data in the SIP message and send the message to the mobility management device through the NAS message. After receiving the NAS message, the mobility management device acquires the SIP message included therein, and the mobility management device sends the SIP message to the first network element. For example, after the mobile management device receives the NAS message, the mobility management device learns the NAS message. And corresponding to the identifier of the user equipment, the mobility management device may learn, according to the identifier of the user equipment, a connection established between the user equipment and the first network element, where the mobility management device sends the SIP to the first network element by using the foregoing connection. The message, for example, the mobility management device sends a relay message to the first network element, where the relay message includes the SIP message. After receiving the SIP message, the first network element sends the SIP message to the application server, for example, after the first network element receives the SIP message, the first network element learns the SIP message pair. The user name of the user equipment, the first network element may learn, according to the user name of the user equipment, a connection established between the user equipment and the application server, where the first network element sends the foregoing network element to the application server by using the foregoing connection. The above SIP message.

If the user equipment does not support the IMS/SIP protocol stack, for example, the user equipment does not support the IMS/SIP client, the user equipment may encapsulate the uplink data in the NAS message to the mobility management device, and the sending mobility management device receives the After the NAS message, the uplink data included in the NAS is obtained, and the mobility management device sends the uplink data to the first network element, for example, after the mobile management device receives the NAS message, the mobility management device learns the identifier of the user equipment corresponding to the NAS message. The mobile management device can learn, according to the identifier of the user equipment, the connection between the user equipment and the first network element, and the mobile management device sends the uplink data to the first network element by using the foregoing connection, for example, mobility management. The device sends a relay message to the first network element, where the relay message includes the uplink data. After the first network element receives the uplink data, the first network element encapsulates the uplink data in a SIP message, and sends the SIP message to the application server, for example, after the first network element receives the relay message, The first network element learns the identifier of the user equipment corresponding to the relay message according to the connection that receives the relay message, and learns from the corresponding relationship between the identifier of the user equipment and the user name of the user equipment. The user name of the user equipment corresponding to the identifier of the user equipment, so that the user name of the user equipment corresponding to the relay message is obtained, and the first network element learns, according to the user name of the user equipment, the application server established by the user equipment. The first network element sends the SIP message to the application server through the connection.

B. Downlink data transmission.

If the user equipment supports the IMS/SIP protocol stack, for example, the user equipment supports the IMS/SIP client, and the application server can encapsulate the downlink data according to the configuration information of the operator (the user equipment supports the IMS/SIP client). In the SIP message, the foregoing SIP message is sent to the first network element, for example, the application server may learn, according to the user name of the user equipment, a connection established between the user equipment and the first network element, and the application server passes the foregoing connection. Sending to the first network element The above SIP message. After the first network element receives the SIP message, the first network element sends the SIP message to the mobility management device. For example, after the first network element receives the SIP message, the first network element learns the SIP message. a user name of the user equipment, the first network element, according to the correspondence between the identifier of the user equipment and the user name of the user equipment, the identifier of the user equipment corresponding to the user name of the user equipment, according to the foregoing An identifier of the user equipment, so as to obtain a connection with the mobile management device established by the user equipment, the first network element sends the SIP message to the mobility management device by using the foregoing connection, for example, the first network element to the foregoing The mobility management device sends a relay message, and the relay message includes the SIP message. After the mobile management device receives the SIP message, the mobility management device sends the SIP message to the user equipment, for example, after the mobile management device receives the relay message, the mobility management device receives the connection according to the relay information. Obtaining the identifier of the user equipment corresponding to the foregoing relay message, the mobility management device encapsulating the SIP message in the NAS message according to the identifier of the user equipment, and sending the NAS message to the user equipment, if the user equipment is in an idle state, The mobility management device first pages the user equipment, causes the user equipment to go to the connected state, and then sends the N AS message to the user equipment.

If the user equipment does not support the IMS/SIP client, the application server does not support the IMS/SIP client, and the application server can The downlink data is encapsulated in the SIP message, and the foregoing SIP message is sent to the first network element. For example, the application server may learn, according to the user name of the user equipment, the connection established between the user equipment and the first network element, and the application server. Sending the SIP message to the first network element by using the foregoing connection. After the first network element receives the SIP message, the first network element parses the SIP message to obtain downlink data sent by the application server, and sends the downlink data to the mobility management device, for example, the first network element receives the SIP message. After the first network element learns the user name of the user equipment corresponding to the SIP message, the first network element learns the user equipment according to the correspondence between the identifier of the user equipment and the user name of the user equipment. The identifier of the user equipment corresponding to the user name, according to the identifier of the user equipment, so as to know that the user equipment is The first network element sends the downlink data to the mobility management device by using the connection, for example, the first network element sends a relay message to the mobility management device. The above relay message includes the downlink data. After the mobile management device receives the downlink data, the mobility management device sends the downlink data to the user equipment, for example, after the mobility management device receives the relay message, the mobility management device receives the connection according to the relay information. Obtaining the identifier of the user equipment corresponding to the foregoing relay message, the mobility management device, according to the identifier of the user equipment, encapsulating the downlink data in a NAS message, and sending the NAS message to the user equipment, if the user equipment is in an idle state, The mobility management device first pages the user equipment, causes the user equipment to go to the connected state, and then sends the N AS message to the user equipment.

In the data transmission method provided by the embodiment, the first network element learns the correspondence between the identifier of the user equipment and the user name of the user equipment, so that the first network element can be first according to the identifier of the learned user equipment. The second connection corresponding to the user name of the learned user equipment is connected, and the data of the user equipment is transmitted, so that the data of the user equipment is sent according to the knowledge, thereby optimizing the transmission mode of the low data traffic service, thereby effectively saving network bandwidth. The resource avoids the increase of network-side signaling interaction and the occupation of network bandwidth resources caused by the low-data traffic transmission in the bearer mode, and avoids the shortage of MSISDN, the transmission delay and the transmission without the use of the SMS mode to transmit low-data traffic. Stable, improved transmission quality.

The data transmission method in this embodiment can be applied to multiple radio access networks, for example, an Evolved Universal Mobile Telecommunication System (TITS) terrestrial radio access network (Evolved Universal Mobile Telecommunication System Territorial Radio Access Network, Hereinafter referred to as E-UTRAN), UMTS Territorial Radio Access Network (UTRAN), Global System for Mobile Communications (GSM) / GSM Evolution Technology for Enhanced Data Rate (Enhanced Data Rate for GSM Evolution, referred to as EDGE) GSM EDGE Radio Access Network (GERAN), A network such as the 3rd Generation Partner Project (3GPP) network.

The mobility management device may be a Mobility Management Entity (MME) in the E-UTRAN, or may be a General Packet Radio Service (GPRS) support node in the UTRAN/GERAN. Serving GPRS Supporting Node, referred to as SGSN)

2 is a schematic flowchart of a data transmission method according to Embodiment 2 of the present invention. This embodiment is a specific example of the foregoing Embodiment 1 of the present invention, where the user equipment supports an IMS/SIP protocol stack, as shown in FIG. 2, The data transmission method of this embodiment may include the following steps:

Step 201: The user equipment sends an access request message to the mobility management device, where the access request message includes a first registration request (Register Request) message, where the first registration request message includes a user name of the user equipment, and the first registration The request message is used by the user equipment to register with the first network element; the foregoing access request message may be an attach request (Attach Request) message, a Routing Area Update Request message, or a Tracking Area Update Request. A message, a Service Request message, a Packet Data Network Connectivity Request message, or an Activate Packet Data Protocol Context Request message.

Optionally, the foregoing first registration request message may further include an identifier of the user equipment.

Step 202: The mobile management device receives the foregoing access request message, performs interaction with the subscription database, performs authentication on the user equipment, and acquires subscription data of the user equipment.

Step 203: The mobility management device sends a connection setup request (Connection Setup Request) message to the first network element, where the connection establishment request message includes the identifier of the user equipment and the user name of the user equipment.

Specifically, the method for the mobile management device to notify the first network element of the identifier of the user equipment and the user name of the user equipment can be referred to the related description in the first embodiment of the present invention, and details are not described herein again. Step 204: The first network element returns a Connection Setup Response message to the mobility management device.

Through the foregoing steps 203 and 204, the connection between the mobile management device and the first network element is established for the user equipment, and the first network element learns the identifier of the user equipment and the user of the user equipment. Correspondence of names.

Step 205: The mobility management device returns an access request accept message to the user equipment.

The access request accept message may be an Attach Accept message, a Routing Area Update Accept message, a Tracking Area Update Accept message, or a Service Request Accept. Messages, PDN Connectivity Accept message, Active PDP Context Accept message, etc.

Step 206: The user equipment sends a second register request message to the first network element, where the second registration request message includes a user name of the user equipment, and the second registration request message is used by the user equipment to the application server. Registration

Specifically, the method for the user equipment to notify the first network element of the user name of the user equipment can be referred to the related description in the first embodiment of the present invention, and details are not described herein again.

Step 207: The first network element forwards the second registration request message to the application server, where the second request message includes the user name of the user equipment.

Step 208: The application server returns a 0K message to the first network element.

Step 209: The first network element returns a 0K message to the user equipment.

Through this step, the application server knows the user name of the user equipment. Further, through the foregoing steps 207 and 208, the first network element and the application server establish a connection corresponding to the user name of the device for the user equipment.

Step 210: The user equipment sends uplink data of the user equipment to the application server, and the application server returns an accept message to the user equipment by using the first network element and the mobile management device.

Specifically, the method for the user equipment to send the uplink data of the user equipment to the application server may be See the related description in the first embodiment of the present invention, which is not mentioned here.

Specifically, the application server sends an accept message to the first network element, where the first network element sends a relay message to the mobility management device, where the relay message includes the accept message, and the mobility management device sends an N AS message to the user equipment, where the N The above message is included in the AS message.

Step 211: The application server sends the downlink data of the user equipment to the user equipment, and the user equipment returns an accept message to the application server by using the mobility management device and the first network element.

Specifically, the method for the application server to send the downlink data of the user equipment to the user equipment may refer to the related description in the foregoing Embodiment 1 of the present invention, and is not further described herein.

Specifically, the user equipment sends a NAS message to the mobility management device, where the NAS message includes an accept message, and the mobility management device sends the accept message to the first network element, where the first network element sends the accept message to the application server.

The step 210 of transmitting the uplink data of the user equipment described above and the step 211 of transmitting the downlink data about the user equipment described above are performed in no order.

In the data transmission method provided by the embodiment, the first network element learns the correspondence between the identifier of the user equipment and the user name of the user equipment, so that the first network element can be first according to the identifier of the learned user equipment. The second connection corresponding to the user name of the learned user equipment is connected, and the data of the user equipment is transmitted, thereby optimizing the transmission mode of the low data traffic service, effectively saving network bandwidth resources, and avoiding using the bearer mode to transmit low data traffic. The increase of the network side signaling interaction caused by the service and the occupation of the network bandwidth resources, and the avoidance of the MSISDN shortage caused by the SMS mode transmission of the low data traffic service, the transmission delay and the transmission instability, improve the transmission quality.

FIG. 3 is a schematic flowchart of a data transmission method according to Embodiment 3 of the present invention. This embodiment is another specific example of the foregoing Embodiment 1 of the present invention, where the user equipment does not support the IMS/SIP protocol stack, as shown in FIG. It is shown that the data transmission method of this embodiment may include the following steps:

Step 301: The user equipment sends an access request message to the mobility management device. Optionally, the foregoing access request message includes an identifier of the user equipment.

The above access request message may be an Attach Request message, and the routing area is more Routing Area Update Request message, Tracking Area Update Request message, Service Request message, Packet Data Network Connectivity Request message, or Activate Packet Data Messages such as the "Activate Packet Data Protocol Context Request" message.

Step 302: The mobile management device receives the access request message, and interacts with the subscription database to authenticate the user equipment and obtain the subscription data of the user equipment, where the subscription data includes the user name of the user equipment.

Step 303: The mobility management device sends a connection setup request (Connection Setup Request) message to the first network element, where the connection establishment request message includes the identifier of the user equipment and the user name of the user equipment.

Specifically, the method for the mobile management device to notify the first network element of the identifier of the user equipment and the user name of the user equipment can be referred to the related description in the first embodiment of the present invention, and details are not described herein again.

Step 304: The first network element sends a third registration request (Register Request) message to the application server, where the third registration request message includes a user name of the user equipment, and the third registration request message is used by the first network element proxy user equipment. Register with the application server;

Step 305: The application server returns a 0K message to the first network element.

Through the foregoing step 304, the application server knows the user name of the user equipment. Further, through the foregoing steps 304 and 305, the connection between the first network element and the application server is established for the user equipment.

Step 306: The first network element returns a Connection Setup Response message to the mobility management device.

Through the foregoing steps 303 and 306, a connection is established between the mobility management device and the first network element for the user equipment, and the first network element learns the identifier of the user equipment and the user name of the user equipment.

Step 307: The mobility management device returns an access request accept message to the user equipment.

The above access request accept message may be an Attach Accept message, a routing area. Update Area Accept Accept message, Tracking Area Update Accept message, Service Request Accept message, PDN Connectivity Accept message, Activate PDP context accept ( Active PDP Context Accept ) Messages such as messages.

Step 308: The user equipment sends the uplink data of the user equipment to the application server, and the application server returns an accept message to the user equipment by using the first network element and the mobile management device;

Specifically, the method for the user equipment to send the uplink data of the user equipment to the application server may refer to the related description in the foregoing Embodiment 1 of the present invention, and is not described herein.

Step 309: The application server sends the downlink data of the user equipment to the user equipment, and the user equipment returns an accept message to the application server by using the mobility management device and the first network element.

The step 308 of transmitting the upstream data of the user equipment described above and the step 309 of transmitting the downlink data of the user equipment described above are performed without prioritization.

In the data transmission method provided by the embodiment, the first network element learns the correspondence between the identifier of the user equipment and the user name of the user equipment, so that the first network element can be first according to the identifier of the learned user equipment. The second connection corresponding to the user name of the learned user equipment is connected, and the data of the user equipment is transmitted, thereby optimizing the transmission mode of the low data traffic service, effectively saving network bandwidth resources, and avoiding using the bearer mode to transmit low data traffic. Increased network-side signaling interaction caused by services and occupation of network bandwidth resources, and avoids the use of SMS to transmit low-data traffic services This leads to a shortage of MSISDN, large transmission delay and unstable transmission, which improves the transmission quality.

Alternatively, the embodiment of the present invention may not be related to the processing procedure of the mobility management device. Specifically, the specific method for the first network element to learn the correspondence between the identifier of the user equipment and the user name of the user equipment may include: The device may notify the first network element of the user name of the user equipment, and the wireless access network device may notify the first network element of the identifier of the user equipment, or the user equipment may notify the first network element of the user name of the user equipment and the user equipment. Logo.

Specifically, the user equipment may send a notification message to the first network element, for example, a registration request (Register Request) message, where the notification message includes a user name of the user equipment. The user equipment may first send the foregoing notification message to the radio access network device, where the notification message may be included as a cell in a Non Access Stratum (NAS) message sent by the user equipment to the radio access network device. For example: In the Attach Request message. The radio access network device sends the notification message included in the NAS message to the first network element. For example, the radio access network device sends an initial UE message to the first network element, where the initial UE message is included. The above notification message. The first network element receives the foregoing notification message, and the user name of the user equipment can be obtained from the notification message.

After receiving the notification message sent by the user equipment, the radio access network device may send the notification message and the identifier of the user equipment to the first network element, for example, the radio access network device sends the identifier to the first network element. The initial UE message (Initial UE Message) includes the foregoing notification message and the identifier of the user equipment. Specifically, the radio access network device learns that the identifier of the user equipment can use a method of the prior art, for example, a NAS message sent by the radio access network device from the user equipment, for example, an Attach Request message, where the user equipment is learned. The identifier of the user equipment is obtained from the context of the user equipment, and is not described here.

Further, in this embodiment, the user equipment sends the first network to the first network by using a radio access network device. Before the element notifies the user device of the identifier of the user equipment and the user name of the user equipment, and the foregoing radio access network device notifies the first network element of the identity of the user equipment, the radio access network device needs to know the information of the first network element, for example. : IP address or fully qualified domain name of the first network element ( Fully Qualified Domain

Names, referred to as FQDN). Specifically, the radio access network device can obtain information about the first network element by:

The radio access network device may learn the information of the first network element according to the group identifier of the group to which the user equipment belongs;

Specifically, the information of the corresponding first network element may be configured according to the group identifier of the group to which the user equipment belongs. After the radio access network device learns the group identifier of the group to which the user equipment belongs, if the radio access network device knows that the user equipment belongs to the group, for example, the radio access network device learns that the IMSI/IM of the user equipment belongs to the IMSI/ The wireless access network device is the same as the above-mentioned APN, or the wireless access network device learns that the MTC Group ID of the user equipment is the same as the above-mentioned MTC Group ID, and the wireless access network device is the same as the above-mentioned APN. The information of the first network element may be obtained according to the group identifier. For example, the radio access network device queries the configuration information to obtain information about the first network element corresponding to the group identifier according to the group identifier.

Through the method described above, the radio access network device can learn the information of the first network element, and then can notify the first network element of the identifier of the user equipment.

The first network element can learn the identity of the user equipment and the user name of the user equipment, so that the first network element learns the correspondence between the identifier of the user equipment and the user name of the user equipment. 4 is a schematic flowchart of a data transmission method according to Embodiment 4 of the present invention. This embodiment is another specific example of Embodiment 1 of the present invention. As shown in FIG. 4, the data transmission method in this embodiment may include The following steps:

Step 401: The user equipment establishes a radio resource control (RRC) connection with the radio access network device, and the radio access network device learns the identifier of the user equipment. Specifically, the user equipment may send the information to the radio access network device. RRC establishment (RRC

Setup) The message establishes an RRC connection with the radio access network device, the above RRC setup message Contains the ID of the user device.

The radio access network device in this step may be an Evolved Node B (eNB) in the E-UTRAN, or may be a Radio Network Controller (RNC) in the UTRAN.

Step 402: The radio access network device establishes a lu/S1 interface with the first network element, and the first network element learns the identifier of the user equipment.

Specifically, the radio access network device may send an initial UE message to the first network element, where the initial UE message includes an identifier of the user equipment.

Through the above step 402, the first network element learns the identity of the user equipment.

Step 403: The user equipment sends a fourth call request (Register Request) message to the first network element, where the fourth registration request message includes a user name of the user equipment, where the fourth registration request message is used by the user equipment to the first network. Yuan registration

Specifically, the user equipment may send the fourth registration request message to the first network element by using the NAS message.

Through the above step 403, the first network element learns the user name of the user equipment.

Through the foregoing step 402 and the foregoing step 403, the first network element can learn the correspondence between the identifier of the user equipment and the user name of the user equipment.

Step 404: The first network element sends a message requesting authentication data to the subscription database.

Step 405: The subscription database returns the authentication data to the first network element.

Step 406: The first network element sends an authentication query message to the user equipment.

Challenge Message );

Step 407: The user equipment sends a fifth registration request (Register Request) message to the first network element, where the fifth registration request message includes a user name of the user equipment, where the fifth registration request message is used by the user equipment to register with the application server.

Optionally, the foregoing fifth registration request message may further include an authentication challenge response message of the user equipment. Step 408: The first network element sends the fifth registration request (Register Request) message to the application server, where the fifth registration request message includes the user name of the user equipment.

Step 409: The application server returns an OK message to the first network element.

Through the foregoing step 408, the application server knows the user name of the user equipment. Further, through the foregoing steps 408 and 409, the first network element establishes a connection with the application server for the user equipment.

Step 410: The first network element returns an OK message to the user equipment.

Step 411: The user equipment sends uplink data of the user equipment to the application server, and the application server returns an accept message to the user equipment by using the first network element.

Specifically, the sending, by the user equipment, the uplink data of the user equipment to the application server may include:

If the user equipment supports the IMS/SIP protocol stack, for example, the user equipment supports the IMS/SIP client, the user equipment may encapsulate the uplink data in the SIP message and send the data to the first network element through the NAS message. After the first network element receives the NAS message, the first network element obtains the SIP message, and the first network element sends the SIP message to the application server, for example, after the first network element receives the SIP message, the first network element Obtaining the user name of the user equipment corresponding to the SIP message, the first network element may be configured as a connection between the user equipment and the application server established by the user equipment according to the user name of the user equipment, where the first network element is connected by using the foregoing The application server sends the SIP message.

If the user equipment does not support the IMS/SIP protocol stack, for example, the user equipment does not support the IMS/SIP client, the user equipment may encapsulate the uplink data in the NAS message and send the message to the first network element. After receiving the NAS message, the first network element encapsulates the uplink data in the SIP message, and sends the SIP message to the application server, for example, after the first network element receives the NAS message. The first network element obtains the identifier of the user equipment corresponding to the NAS message, and learns the user of the user equipment corresponding to the identifier of the user equipment according to the correspondence between the identifier of the user equipment and the user name of the user equipment. Name, the first network element encapsulates the uplink data in a SIP message, and according to the user equipment The user name is known as a connection established between the user equipment and the application server, and the first network element sends the SIP message to the application server by using the connection.

Step 412: The application server sends downlink data of the user equipment to the user equipment, and the user equipment returns an accept message to the application server by using the first network element.

Specifically, the sending, by the application server, the downlink data of the user equipment to the user equipment may include the following methods:

If the user equipment supports the IMS/SIP protocol stack, for example, the user equipment supports the IMS/SIP client, the application server may encapsulate the downlink data in the SIP message, and send the SIP message to the first network element, for example: The application server can learn the connection with the first network element established by the user equipment according to the user name of the user equipment, and the application server sends the SIP message to the first network element by using the foregoing connection. After the first network element receives the SIP message, the first network element sends the SIP message to the user equipment. For example, after the first network element receives the SIP message, the first network element learns to correspond to the SIP message. The user name of the user equipment, the first network element, according to the correspondence between the identifier of the user equipment and the user name of the user equipment, the identifier of the user equipment corresponding to the user name of the user equipment, the first The network element encapsulates the SIP message in the NAS message according to the identifier of the user equipment, and sends the NAS message to the user equipment. If the user equipment is in an idle state, the first network element first pages the user equipment, and the user equipment is transferred to the user equipment. Connected state, and then send the above NAS message to the user equipment.

If the user equipment does not support the IMS/SIP protocol stack, for example, the user equipment does not support the IMS/SIP client, the application server may encapsulate the downlink data in the SIP message, and send the SIP message to the first network element. For example, the application server can learn the connection with the first network element established by the user equipment according to the user name of the user equipment, and the application server sends the SIP message to the first network element by using the foregoing connection. After the first network element receives the SIP message, the first network element parses the SIP message to obtain downlink data sent by the application server, and sends the downlink data to the user equipment, for example, after the first network element receives the SIP message. The first network element learns the user name of the user equipment corresponding to the SIP message, and the first network element is learned according to the The mapping between the identifier of the user equipment and the user name of the user equipment is used to obtain the identifier of the user equipment corresponding to the user name of the user equipment, and the first network element encapsulates the downlink data in the NAS according to the identifier of the user equipment. In the message, the NAS message is sent to the user equipment. If the user equipment is in the idle state, the first network element first pages the user equipment, causes the user equipment to go to the connected state, and then sends the NAS message to the user equipment.

The step 411 of transmitting the uplink data of the user equipment described above and the step 412 of transmitting the downlink data of the user equipment described above are performed without prioritization.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

FIG. 5 is a schematic structural diagram of a data transmission apparatus according to Embodiment 5 of the present invention. As shown in FIG. 5, the data transmission apparatus of this embodiment may include a learning module 51 and a transmission module 52. The learning module 51 knows the correspondence between the identifier of the user equipment and the user name of the user equipment, and the transmission module 52 is configured according to the first connection corresponding to the identifier of the user equipment and the second corresponding to the user name of the user equipment. Connect, transfer data from the user device. The functions of the first network element in the first, second, third, and fourth embodiments of the present invention can be implemented by the data transmission apparatus provided in this embodiment.

The data transmission device provided in this embodiment obtains the correspondence between the identifier of the user equipment and the user name of the user equipment by the learning module, so that the first network element can be based on the first connection corresponding to the identifier of the learned user equipment. The second connection corresponding to the user name of the learned user equipment transmits the data of the user equipment, thereby optimizing the transmission mode of the low data traffic service, effectively saving the network bandwidth resource, and avoiding the use of the bearer mode to transmit the low data traffic service. The increase of network side signaling interaction and the occupation of network bandwidth resources, and avoiding the shortage of MSISDN caused by the transmission of low data traffic in the SMS mode, the transmission delay and transmission instability, improve the transmission quality.

Further, the learning module 51 in this embodiment may specifically receive the identifier of the user equipment sent by the user equipment by using the mobility management device or the radio access network device, and the user name of the user equipment, or may further receive the user equipment. Receiving, by the mobile management device or the wireless access network device, the user name of the user equipment, receiving the identifier of the user equipment sent by the mobile management device or the wireless access network device, or receiving the user equipment sent by the mobility management device The identifier and the username of the above user device.

Further, the learning module 51 in this embodiment may further receive the information of the application server that is sent by the mobile management device, or may also learn the information of the application server according to the group identifier of the group to which the user equipment belongs, and The application server identified by the information of the application server sends the username of the user equipment.

Specifically, for the uplink data, the transmission module 52 in this embodiment may receive the uplink from the user equipment sent by the mobility management device or the radio access network device by using the first connection corresponding to the identifier of the user equipment. Data, according to the first connection, the identifier of the corresponding user equipment is obtained, and the user name of the user equipment corresponding to the identifier of the user equipment is obtained according to the corresponding relationship, and the second connection corresponding to the user name of the user equipment is obtained. The foregoing uplink data is sent to the user application server. For the downlink data, the transmission module 52 in this embodiment may receive the second connection that is sent by the application server by using the second connection corresponding to the user name of the user equipment. According to the foregoing correspondence, the identifier of the user equipment corresponding to the user name of the learned user equipment is obtained, and the first connection corresponding to the identifier of the user equipment is sent, and the downlink data is sent to the mobility management device or the radio access network device. And the foregoing mobile management device or the radio access network device sends the downlink data to the user equipment according to the identifier of the obtained user equipment.

FIG. 6 is a schematic structural diagram of a data transmission system according to Embodiment 6 of the present invention. As shown in FIG. 6, the data transmission system of this embodiment may include a first network element 61, configured to learn the user name and user equipment of the user equipment. Corresponding relationship between the identifiers, the data of the user equipment is transmitted according to the first connection corresponding to the identifier of the user equipment and the second connection corresponding to the user name of the user equipment.

The functions of the first network element in the first, second, third, and fourth embodiments of the present invention can be implemented by the first network element 61 in the data transmission system provided in this embodiment.

Further, the data transmission system of this embodiment may further include a mobility management device 62, configured to acquire the identifier of the user equipment and the user name of the user equipment, and send the identifier of the user equipment and the user equipment to the first network element 61. Username.

Alternatively, the data transmission system of the embodiment may further include a radio access network device 63, configured to acquire the identifier of the user equipment and the user name of the user equipment, and send the user equipment to the first network element 61. The identifier and the user name of the user.

Further, the mobility management device 62 or the radio access network device 63 in this embodiment may be further configured to learn information about the first network element, so that the mobility management device 62 or the radio access network device 63 is directed to the first network. The first network element 61 of the information identifier of the element transmits the identifier of the user equipment and the user name of the user equipment.

Further, the data transmission system of this embodiment may further include an application server 64, configured to receive a username of the user equipment sent by the first network element 61. Correspondingly, the first network element 61 may further obtain the information of the application server, so that the first network element 61 sends the user name of the user equipment to the application server 64 identified by the information of the application server.

It should be noted that: the embodiment of the present invention can be applied not only to the communication system of the M2M but also to other communication systems, for example: Human to Human (H2H) In the communication system and the like, the embodiment of the present invention does not limit this.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A method for transmitting data, comprising:

Obtaining a correspondence between the identifier of the user equipment and the user name of the user equipment; transmitting the first connection according to the first connection corresponding to the identifier of the user equipment and the second connection corresponding to the user name of the user equipment User device data.

The method according to claim 1, wherein the correspondence between the identifier of the user equipment and the user name of the user equipment is as follows:

Receiving, by the user equipment, an identifier of the user equipment sent by the mobile management device or the radio access network device, and a username of the user equipment; or

Receiving, by the user equipment, a user name of the user equipment sent by the user equipment or the radio access network device, receiving an identifier of the user equipment sent by the mobility management device or the radio access network device; or

Receiving an identifier of the user equipment and a user name of the user equipment sent by the mobility management device.

The method according to claim 2, wherein the receiving the identifier of the user equipment sent by the mobility management device or the identifier of the user equipment and the user name of the user equipment include:

Receiving, by the mobile management device, an identifier of the user equipment sent according to an application feature of the user equipment or an identifier of the user equipment and a user name of the user equipment; or

Receiving, by the mobile management device, an identifier of the user equipment that is sent according to the group identifier of the group to which the user equipment belongs, or an identifier of the user equipment that is sent and a user name of the user equipment.

The method according to claim 2, wherein, when the first network element learns the correspondence between the identifier of the user equipment and the user name of the user equipment, the first network element learns the user equipment Before the mapping between the user name and the username of the user equipment, the mobile management device or the radio access network device learns the information about the first network element.

The method of claim 4, wherein the information about the first network element is obtained by the mobility management device or the radio access network device includes: The mobility management device learns information about the first network element from subscription data of the user equipment; or

The mobile management device or the radio access network device learns the information of the first network element according to the group identifier of the group to which the user equipment belongs; or

The mobility management device learns the information of the first network element according to the access point name APN of the user equipment.

The method according to claim 1, wherein the transmitting the user equipment according to a first connection corresponding to an identifier of the user equipment and a second connection corresponding to a user name of the user equipment The data also includes:

Sending the username of the user device to the application server.

The method according to claim 6, wherein when the first network element sends the user name of the user equipment to the application server, the first network element sends the user name of the user equipment to the application server. Previously included:

The first network element learns information of the application server.

The method according to claim 7, wherein the information that the first network element learns the application server includes:

The first network element receives the information of the application server that is sent by the mobile management device; or the first network element learns the information of the application server according to the group identifier of the group to which the user equipment belongs.

The method according to claim 1, wherein the transmitting the user equipment according to the first connection corresponding to the identifier of the user equipment and the second connection corresponding to the user name of the user equipment The data includes:

Receiving, by the first network element, the uplink data sent by the mobility management device or the radio access network device from the user equipment by using the first connection corresponding to the identifier of the user equipment;

The first network element learns the identifier of the corresponding user equipment according to the first connection, and the first network element learns, according to the corresponding relationship, the identifier corresponding to the identifier of the user equipment. User name of the device;

Transmitting, by the first network element, the uplink data to the user application server by using a second connection corresponding to the user name of the user equipment;

Or

Receiving, by the second network element, the downlink data sent by the application server by using the second connection corresponding to the user name of the user equipment;

The first network element learns, according to the corresponding relationship, an identifier of the user equipment corresponding to the user name of the obtained user equipment;

Sending, by the first network element, the first connection corresponding to the identifier of the user equipment, to the mobility management device or the radio access network device, the downlink data, for the mobile management device or the radio access network device to learn The identifier of the user equipment, and the downlink data is sent to the user equipment.

10. A data transmission device, comprising:

The device according to claim 10, wherein the learning module is specifically configured to receive an identifier of the user equipment sent by the user equipment by using a mobility management device or a radio access network device, and the user equipment Username; or

The device according to claim 10, wherein the learning module is further configured to receive information about the application server sent by the mobility management device, or according to a group identifier of a group to which the user equipment belongs Obtaining information about the application server and serving the application The application server identified by the information of the device sends the username of the user device.

The device according to any one of claims 10 to 12, wherein the transmission module is specifically used for

Receiving, by the first connection corresponding to the identifier of the user equipment, uplink data sent by the mobile management device or the radio access network device, and obtaining, according to the first connection, an identifier of the corresponding user equipment, According to the correspondence, the user name of the user equipment corresponding to the identifier of the user equipment is obtained, and the uplink data is sent to the user application server by using a second connection corresponding to the user name of the user equipment; or

Receiving, by the second connection corresponding to the user name of the user equipment, the downlink data sent by the application server, and obtaining, according to the correspondence, the identifier of the user equipment corresponding to the user name of the learned user equipment, and the user equipment Corresponding to the first connection, the downlink data is sent to the mobility management device or the radio access network device, where the mobility management device or the radio access network device sends the identifier to the The user equipment sends the downlink data.

14. A transmission system for a data, characterized in that

15. The system of claim 14 further comprising

And a mobility management device, configured to acquire an identifier of the user equipment and a user name of the user equipment, and send the identifier of the user equipment and the user name of the user equipment to the first network element.

The system according to claim 15, wherein the mobility management device is further configured to learn information of the first network element, so that the mobility management device identifies information of the first network element. The first network element sends the identifier of the user equipment and the user name of the user equipment.

17. The system of claim 14 further comprising

The radio access network device is configured to obtain the identifier of the user equipment and the user name of the user equipment, and send the identifier of the user equipment and the user name of the user equipment to the first network element.

The system according to claim 17, wherein the radio access network device is further configured to learn information about the first network element, so that the radio access network device is to the first network. The first network element identified by the information of the element sends the identifier of the user equipment and the user name of the user equipment.

19. A system according to any of claims 14 to 18, further comprising

An application server, configured to receive a username of the user equipment sent by the first network element.

The system according to claim 19, wherein the first network element is further configured to learn information of the application server, so that the first network element applies an identifier to the application server. The server sends the username of the user equipment.