WO2015010325A1

WO2015010325A1 - Data transmission method and apparatus

Info

Publication number: WO2015010325A1
Application number: PCT/CN2013/080194
Authority: WO
Inventors: 张万强; 于益俊
Original assignee: 华为技术有限公司
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2015-01-29
Also published as: CN104995875B; CN104995875A

Abstract

The present invention provides a data transmission method and apparatus, which relate to the technical field of communications and can save network resources. The method comprises: a mobility management entity obtaining an indicator about whether to establish a default bearer for user equipment; when determining according to the indicator about whether to establish a default bearer for user equipment that the default bearer is not established, the mobility management entity transmitting to a wireless access network an indicator about non-establishment of the default bearer; and the mobility management entity realizing data transmission with the user equipment through NAS signaling when the default bearer is not established.

Description

Data transmission method and device

The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus. Background technique

In the Evolved Packet System (EPS), after the user equipment (User Equipment, UE) completes the network attach procedure, the network side establishes a default bearer for the user equipment, and the default bearer can be used for data transmission. And can be deleted when the UE logs out from the network side.

However, when the UE needs to send data based on an Internet Protocol (IP) link service or data of a small data volume service, the default bearer does not need to be used for data transmission, resulting in idle bearer and waste. Network resources.

Summary of the invention

The invention provides a data transmission method and device, which can save network resources. In order to achieve the above object, the present invention uses the following technical solutions:

In a first aspect, a data transmission method is provided, including:

The mobility management network element acquires whether to establish a default bearer indication for the user equipment. If the mobility management network element determines that the default bearer is not established according to whether the user equipment establishes a default bearer indication, the sending to the radio access network element is not established. Default bearer indication;

The mobility management network element performs data transmission with the user equipment through NAS signaling when the default bearer is not established.

With reference to the first aspect, in a first implementation manner of the first aspect, the acquiring, by the mobility management network element, a default bearer indication for the user equipment, includes:

Receiving, by the mobility management network element, whether the user equipment sends a default bearer indication for the user equipment by using an attach request message;

Or the mobility management network element receives the user equipment by using an attach request Whether the information is sent by the user equipment to establish a default bearer indication and the subscription information of the user equipment that is sent by the home subscriber subscription server by updating the location confirmation message, where the subscription information includes whether to establish a default bearer indication for the user equipment;

Or the mobility management network element receives a context response message sent by the original mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved without establishing a default bearer. Instructions.

With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the determining whether to establish a default bearer indication for the user equipment is represented by an attachment type in the attach request message;

Or whether the establishing a default bearer indication for the user equipment is indicated by an additional update type in the attach request message;

Or whether the establishing a default bearer indication for the user equipment is represented by a device priority in the attach request message;

Or whether the establishing a default bearer indication for the user equipment is represented by a user equipment network capability in the attach request message.

In conjunction with any of the foregoing implementations of the first aspect, in a third implementation of the first aspect,

The mobility management network element sends a default bearer indication to the radio access network element, including:

The mobility management network element sends a default bearer indication to the radio access network element by using an attach accept message.

In conjunction with any of the foregoing implementation manners of the first aspect, in a fourth implementation manner of the first aspect, the method further includes:

And the mobility management network element saves, in the context information of the user equipment, that the default bearer indication is not established.

In combination with the fourth implementation manner of the first aspect, in a fifth implementation manner of the first aspect, the method further includes:

Receiving, by the mobility management network element, a context request message sent by a new mobility management network element, where the context request message is received by the new mobility management network element After the tracking area/routing area update request sent by the user equipment is sent, the tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment;

a context response message sent by the mobility management network element to the new mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved without establishing a default bearer. Instructing, to cause the new mobility management network element to determine whether to establish a default bearer for the user equipment.

In conjunction with the fourth implementation of the first aspect, in a sixth implementation of the first aspect,

The mobility management network element further includes: before the data transmission with the user equipment by using the NAS signaling, when the default bearer is not established.

Receiving, by the mobility management network element, a service request sent by the user equipment, where the service request is sent by the user equipment when it is determined that data transmission is not required by using a user plane bearer;

Whether the mobility management network element queries the context information of the user equipment to include not establishing a default bearer indication;

And the mobility management network element sends an initial context setup request to the radio access network element to notify the radio access network element to be the same if the context information of the user equipment includes not establishing a default bearer indication. The user equipment does not establish a data radio bearer and sends an RRC connection reconfiguration message to the user equipment, where the initial context setup request includes security context information and the default bearer indication is not established, and the RRC connection reconfiguration message includes no Establish a data radio bearer indication.

With reference to the sixth implementation manner of the first aspect, in a seventh implementation manner of the first aspect, before the mobility management network element receives the service request sent by the user equipment, the method further includes:

The mobility management network element sends a page to the user equipment if the context information of the user equipment includes not setting a default bearer indication, or if the downlink data includes an indication that the data transmission is not required by the user plane bearer. Message

The paging message includes data transmission without using a user plane bearer. In conjunction with the fourth implementation of the first aspect, in an eighth implementation manner of the first aspect,

When the mobility management network element does not establish a default bearer, performing data transmission with the user equipment by using NAS signaling includes:

The mobility management network element sends a page to the user equipment if the context information of the user equipment includes not setting a default bearer indication, or if the downlink data includes an indication that the data transmission is not required by the user plane bearer. a message, the paging message includes an indication that the data transmission is not required by the user plane bearer;

The mobility management network element receives a signaling plane data transmission request sent by the user equipment, where the signaling plane data transmission request is sent by the user equipment when it is determined that data transmission is not required by using a user plane bearer;

Transmitting, by the mobility management network element, a first signaling plane data transmission accept message to the radio access network element, to trigger the radio access network element to send a second signaling plane data transmission accept message to the user equipment The first signaling plane data transmission accept message includes: security context information and downlink data, and the second signaling plane data transmission accept message includes: the downlink data.

With reference to the first aspect, in a ninth implementation manner of the first aspect, when the mobility management network element does not establish a default bearer, performing data transmission with the user equipment by using NAS signaling includes:

The mobility management network element receives a signaling plane data transmission request sent by the user equipment, where the signaling plane data transmission request includes: uplink data, where the signaling plane data transmission request is determined by the user equipment not to pass The user plane carries the data transmission when it is transmitted;

The mobility management network element extracts the uplink data from the signaling plane data transmission request;

Transmitting, by the mobility management network element, a first signaling plane data transmission accept message to the radio access network element, to trigger the radio access network element to send a second signaling plane data transmission accept message to the user equipment The first signaling plane data transmission accept message includes: security context information. With reference to the eighth or ninth implementation of the first aspect, in the tenth implementation manner of the first aspect, the method further includes:

Receiving, by the mobility management network element, a signaling plane data transmission completion message sent by the user equipment, where the signaling plane data transmission completion message includes whether to release a signaling connection indication;

The mobility management network element determines whether to release the signaling connection according to whether to release the signaling connection indication.

In conjunction with the fourth implementation manner of the first aspect, in the eleventh implementation manner of the first aspect, the method further includes:

The mobility management network element receives the delete bearer request sent by the packet data gateway; the mobility management network element determines the context information or the user equipment of the user equipment when the bearer to be deleted is the last bearer of all PDN connections Whether the subscription data includes not establishing a default bearer indication;

If the mobility management network element includes not establishing a default bearer indication, sending a deactivation bearer request to the radio access network element, to request the radio access network element to send an RRC link reconfiguration message to the user equipment, The deactivation bearer request includes a deactivate EPS bearer context request and a no detach indication, and the RRC link reconfiguration message includes a deactivate EPS bearer context request and a no detach indication. In a second aspect, a data transmission method is provided, including:

And the user equipment sends a default bearer indication to the mobility management network element to notify the mobility management network element to determine whether to establish a default bearer indication for the user equipment, and determine to not establish a default bearer. The incoming NE sends no default bearer indication.

The user equipment performs data transmission with the mobility management network element through NAS signaling when the default bearer is not established.

With reference to the second aspect, in a first implementation manner of the second aspect, the user equipment sends, to the mobility management network element, whether to establish a default bearer indication for the user equipment, where the user equipment sends the mobility request message to the mobile device. Whether the management NE sends The user equipment establishes a default bearer indication.

With reference to the first implementation manner of the second aspect, in a second implementation manner of the second aspect, the determining whether to establish a default bearer indication for the user equipment is indicated by an attachment type in the attach request message;

In combination with the foregoing implementation manner of the second aspect, in a third implementation manner of the second aspect, the method further includes:

The user equipment sends a tracking area/routing area update request message to the new mobility management network element, where the tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment, so that the new mobility The management network element determines whether a default bearer is established for the user equipment.

With the foregoing implementation of the second aspect, in a fourth implementation manner of the second aspect, the user equipment, before the data transmission is performed by using the NAS signaling and the mobility management network element, when the default bearer is not established. , Also includes:

When the user equipment determines that data transmission is not required by the user plane bearer, the user equipment sends a service request to the mobility management network element to notify the mobility management network element that the user equipment does not establish data wireless. Hosted.

With the second implementation of the second aspect, in a fifth implementation manner of the second aspect, when the user equipment determines that data transmission is not required by using a user plane bearer, the user equipment sends the user equipment to the mobility management network. Before the sending of the service request, the method further includes: the user equipment receiving a paging message sent by the mobility management network element, where the paging message includes, by using a user plane bearer, a data transmission indication, and is managed by the mobility The determining, by the network element, that the user equipment does not need to establish a default bearer indication, or the downlink data includes not performing data transmission through the user plane bearer. Sent when the indication is lost.

With reference to the second aspect, in a sixth implementation manner of the second aspect, the user equipment performs data transmission with the mobility management network element by using NAS signaling when the default bearer is not established, including:

Receiving, by the user equipment, a paging message sent by the mobility management network element, where the paging message includes, by using a user plane bearer, a data transmission indication, and determining, by the mobility management network element, the user equipment The context information includes: when the default bearer indication is not established, or when the downlink data includes the data transmission indication without using the user plane bearer;

When the user equipment determines that data transmission is not required by the user plane bearer, the user equipment sends a signaling plane data transmission request to the radio access network element to request the radio access network element to forward the signaling a surface data transmission request to the mobility management network element;

Receiving, by the user equipment, the second access plane data transmission accept message, where the second signaling plane data transmission accept message receives the mobility by the radio access network element After the first signaling plane data transmission accept message sent by the management network element is sent, the first signaling plane data transmission accept message includes: security context information and the downlink data, and the second signaling plane data transmission accept message The method includes: the downlink data.

With reference to the second aspect, in a seventh implementation manner of the second aspect, the user equipment performs data transmission with the mobility management network element by using NAS signaling when the default bearer is not established, including:

When the user equipment determines that data transmission is not required by the user plane bearer, the user equipment sends a signaling plane data transmission request to the radio access network element to request the radio access network element to forward the signaling The data transmission request is sent to the mobility management network element, and the signaling plane data transmission request includes: uplink data;

Receiving, by the user equipment, the second access plane data transmission accept message, where the second signaling plane data transmission accept message receives the mobility by the radio access network element The first signaling plane data transmission received by the management network element is accepted. After the message is sent, the first signaling plane data transmission accept message includes: security context information.

With reference to the sixth or seventh implementation manner of the second aspect, in the eighth implementation manner of the second aspect, the method further includes:

And the user equipment sends a signaling plane data transmission completion message to the mobility management network element, where the signaling plane data transmission completion message includes whether to release the signaling connection indication. In a third aspect, a data transmission apparatus is provided, including:

The obtaining module is configured to: obtain a default bearer indication for the user equipment, and send, by the sending module, if the default bearer is not established according to whether the default bearer indication is established for the user equipment, and the default bearer is not sent to the radio access network element. And a transmitting module, configured to perform data transmission with the user equipment by using NAS signaling when the default bearer is not established.

With reference to the third aspect, in a first implementation manner of the third aspect, the acquiring module is specifically configured to receive, by the user equipment, whether a default bearer indication is established for the user equipment by using an attach request message;

Or the acquiring module is specifically configured to: receive, by the user equipment, a default bearer indication that is sent by the user equipment by using an attach request message, and sign the user equipment that is sent by the home subscriber subscription server by updating the location confirmation message. Information, the subscription information includes whether to establish a default bearer indication for the user equipment;

Or the acquiring module is configured to receive a context response message sent by the original mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved without establishing a default. Bearer indication.

With reference to the first implementation manner of the third aspect, in a second implementation manner of the third aspect, whether the default bearer indication is established for the user equipment is indicated by an attachment type in the attach request message;

Or whether the default bearer indication is established for the user equipment by using the attach request The priority of the device in the message;

With the foregoing implementation of the third aspect, in a third implementation manner of the third aspect, the sending module is specifically configured to send, by using an attach accept message, a default bearer indication to the radio access network element.

In conjunction with the foregoing implementation manner of the third aspect, in a fourth implementation manner of the third aspect, the method further includes:

And a storage module, configured to save the non-establishment default bearer indication in context information of the user equipment.

In combination with the fourth implementation manner of the third aspect, in a fifth implementation manner of the third aspect, the method further includes:

a receiving module, configured to receive a context request message sent by the new mobility management network element, where the context request message is sent by the new mobility management network element after receiving the tracking area/routing area update request sent by the user equipment, The tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment;

The sending module is further configured to send a context response message to the new mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved without establishing a default. Carrying an indication to cause the new mobility management network element to determine whether to establish a default bearer for the user equipment.

In conjunction with the fourth implementation of the third aspect, in a sixth implementation of the third aspect,

Also includes:

a receiving module, configured to receive a service request sent by the user equipment, where the service request is sent by the user equipment when the data transmission is not required to be performed by the user plane bearer, and the query module is configured to query the context information of the user equipment. Whether to include not establishing a default bearer indication;

The sending module is further configured to send the initial to the radio access network element if the querying module inquires that the context information of the user equipment includes not establishing a default bearer indication. And initiating a context establishment request, to notify the radio access network element that the user equipment does not establish a data radio bearer and send an RRC connection reconfiguration message to the user equipment, where the initial context setup request includes security context information and The default bearer indication is not established, and the RRC connection reconfiguration message includes not establishing a data radio bearer indication.

With the sixth implementation of the third aspect, in a seventh implementation manner of the third aspect, the sending module is further configured to: when the context information of the user equipment includes not establishing a default bearer indication, or Sending a paging message to the user equipment if the downlink data includes an indication that the data transmission is not required by the user plane bearer;

The paging message includes a data transmission indication that does not need to be carried by a user plane bearer.

With reference to the fourth implementation manner of the third aspect, in the eighth implementation manner of the third aspect, the transmitting module is specifically configured to: when the context information of the user equipment includes not establishing a default bearer indication, or And sending, to the user equipment, a paging message, where the downlink data includes an indication that the data transmission is not required to be performed by the user plane bearer, where the paging message includes:

The transmission module is further configured to receive a signaling plane data transmission request sent by the user equipment, where the signaling plane data transmission request is sent by the user equipment when it is determined that data transmission is not required by using a user plane bearer;

The transmitting module is further configured to send a first signaling plane data transmission accept message to the radio access network element, to trigger the radio access network element to send a second signaling plane data transmission to the user equipment. Receiving the message, where the first signaling plane data transmission accept message includes: security context information and downlink data, and the second signaling plane data transmission accept message includes: the downlink data.

With reference to the third aspect, in a ninth implementation manner of the third aspect, the transmitting module is configured to receive a signaling plane data transmission request sent by the user equipment, where the signaling plane data transmission request includes: Data, the signaling plane data transmission request is sent by the user equipment when it is determined that data transmission is not required by the user plane bearer;

The device also includes:

An extracting module, configured to extract the uplink number from the signaling plane data transmission request According to;

The transmitting module is further configured to send a first signaling plane data transmission accept message to the radio access network element, to trigger the radio access network element to send a second signaling plane data transmission to the user equipment. Receiving the message, where the first signaling plane data transmission accept message includes: security context information.

With reference to the eighth or ninth implementation manner of the third aspect, in the tenth implementation manner of the third aspect, the method further includes:

a receiving module, configured to receive a signaling plane data transmission completion message sent by the user equipment, where the signaling plane data transmission completion message includes whether to release a signaling connection indication, and a determining module, configured to: according to whether the signaling connection is released Indicates whether to determine whether to release the signaling connection.

In conjunction with the fourth implementation manner of the third aspect, in an eleventh implementation manner of the third aspect, the method further includes:

a receiving module, configured to receive a delete bearer request sent by the packet data gateway, and a determining module, configured to determine context information of the user equipment or subscription data of the user equipment when the bearer to be deleted is the last bearer of all PDN connections Whether to include not establishing a default bearer indication;

The sending module is further configured to: if the default bearer indication is not established, send a deactivation bearer request to the radio access network element, to request the radio access network element to send an RRC link reconfiguration message to the user equipment. The deactivation bearer request includes a deactivate EPS bearer context request and a no detach indication, where the RRC link reconfiguration message includes a deactivate EPS bearer context request and a no detach indication. In a fourth aspect, a data transmission apparatus is provided, including:

a sending module, configured to send, to the mobility management network element, whether to establish a default bearer indication for the user equipment, to notify the mobility management network element to determine, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established, Sending a default bearer indication to the radio access network element;

a transmission module, configured to perform, by NAS signaling, when the default bearer is not established The mobility management network element performs data transmission.

With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the sending module is specifically configured to send, by using an attach request message, a mobility management network element, whether to establish a default bearer indication for the user equipment.

With reference to the first implementation manner of the fourth aspect, in a second implementation manner of the fourth aspect, the determining whether to establish a default bearer indication for the user equipment is represented by an attachment type in the attach request message;

With the foregoing implementation of the fourth aspect, in a third implementation manner of the fourth aspect, the sending module is further configured to send a tracking area/routing area update request message to the new mobility management network element, where The tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment, so that the new mobility management network element determines whether to establish a default bearer for the user equipment.

With the foregoing implementation of the fourth aspect, in a fourth implementation manner of the fourth aspect, the sending module is further configured to: when the user equipment determines that data transmission is not required by using a user plane bearer, The mobility management network element sends a service request to notify the mobility management network element that the user equipment does not establish a data radio bearer.

In conjunction with the second implementation manner of the fourth aspect, in a fifth implementation manner of the fourth aspect, the method further includes:

a receiving module, configured to receive a paging message sent by the mobility management network element, where the paging message includes, by using a user plane bearer, a data transmission indication, and the mobility management network element determines the user equipment The context information includes when the default bearer indication is not established, or when the downlink data includes an indication that the data transmission is not required by the user plane bearer. With reference to the fourth aspect, in a sixth implementation manner of the fourth aspect, the transmitting module is configured to receive a paging message that is sent by the mobility management network element, where the paging message includes And performing the data transmission indication, and the mobility management network element includes, when the context information of the user equipment is determined, that the default bearer indication is not established, or the downlink data includes sending, when the data transmission indication is not required by using the user plane bearer;

The transmitting module is further configured to: when the user equipment determines that data transmission is not required by the user plane bearer, send a signaling plane data transmission request to the radio access network element to request the radio access network element Forwarding the signaling plane data transmission request to the mobility management network element;

The transmitting module is further configured to receive, by the radio access network element, a second signaling plane data transmission accept message, where the second signaling plane data transmission accept message is received by the radio access network element After the first signaling plane data transmission accept message sent by the mobility management network element, the first signaling plane data transmission accept message includes: security context information and the downlink data, the second signaling The face data transmission accept message includes: the downlink data.

With reference to the fourth aspect, in a seventh implementation manner of the fourth aspect, the transmitting module is specifically configured to: when determining that data transmission by using a user plane bearer is not required, sending signaling plane data to the radio access network element Transmitting a request to request the radio access network element to forward the signaling plane data transmission request to the mobility management network element, where the signaling plane data transmission request includes: uplink data;

The transmitting module is further configured to receive, by the radio access network element, a second signaling plane data transmission accept message, where the second signaling plane data transmission accept message is received by the radio access network element After the first signaling plane data transmission accept message sent by the mobility management network element is sent, the first signaling plane data transmission accept message includes: security context information.

With the sixth or seventh implementation manner of the fourth aspect, in the eighth implementation manner of the fourth aspect, the sending module is further configured to send the signaling plane data transmission to the mobility management network element. Message, the signaling plane data transmission completion message includes Whether to release the signaling connection indication. A fifth aspect provides a data transmission apparatus, including:

The receiver is configured to: determine whether to establish a default bearer for the user equipment, and send, by the transmitter, to the radio access network element, if the default bearer is not established according to whether the default bearer indication is established for the user equipment, The receiver is further configured to receive data sent by the user equipment by using NAS signaling when the default bearer is not established;

The transmitter is further configured to send data to the user equipment by using NAS signaling when a default bearer is not established.

With reference to the fifth aspect, in a first implementation manner of the fifth aspect, the receiver is configured to receive, by the user equipment, whether a default bearer indication is established for the user equipment by using an attach request message;

Or the receiving, by the user equipment, whether the user equipment establishes a default bearer indication by using the attach request message, and the subscription of the user equipment that is sent by the home subscriber subscription server by updating the location confirmation message. Information, the subscription information includes whether to establish a default bearer indication for the user equipment;

Or the receiver is configured to receive a context response message sent by the original mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved without establishing a default. Bearer indication.

With reference to the first implementation manner of the fifth aspect, in a second implementation manner of the fifth aspect, whether the default bearer indication is established for the user equipment is represented by an attachment type in the attach request message;

Or whether the establishing a default bearer indication for the user equipment is represented by a user equipment network capability in the attach request message. With reference to any of the foregoing implementation manners of the fifth aspect, in a third implementation manner of the fifth aspect, the transmitter is specifically configured to send, by using an attach accept message, a default bearer indication to the radio access network element.

In conjunction with the foregoing implementation manner of the fifth aspect, in a fourth implementation manner of the fifth aspect, the method further includes:

And a storage, configured to save, in the context information of the user equipment, the default bearer indication not established.

With reference to the fourth implementation manner of the fifth aspect, in a fifth implementation manner of the fifth aspect, the receiver is further configured to receive a context request message sent by a new mobility management network element, where the context request message is After the new mobility management network element receives the tracking area/routing area update request sent by the user equipment, the tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment;

The transmitter is further configured to send a context response message to the new mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved without establishing a default. Carrying an indication to cause the new mobility management network element to determine whether to establish a default bearer for the user equipment.

With reference to the fourth implementation manner of the fifth aspect, in a sixth implementation manner of the fifth aspect, the receiver is further configured to receive a service request sent by the user equipment, where the service request is the user equipment Determining that it is sent without data transmission through the user plane bearer;

The data transmission device further includes: a processor, configured to query whether the context information of the user equipment includes not establishing a default bearer indication;

The transmitter is further configured to: if the query module queries that the context information of the user equipment includes not establishing a default bearer indication, sending an initial context setup request to the radio access network element to notify the radio access The network element does not establish a data radio bearer for the user equipment, and sends an RRC connection reconfiguration message to the user equipment, where the initial context setup request includes security context information and the non-establishment default bearer indication, the RRC connection The reconfiguration message includes not establishing a data radio bearer indication.

In conjunction with the sixth implementation of the fifth aspect, the seventh implementation in the fifth aspect The transmitter is further configured to: when the context information of the user equipment includes not establishing a default bearer indication, or if the downlink data includes an indication that the data transmission is not required by the user plane bearer, to the user The device sends a paging message;

With reference to the fourth implementation manner of the fifth aspect, in an eighth implementation manner of the fifth aspect, the transmitter is specifically configured to: when the context information of the user equipment includes not establishing a default bearer indication, or And sending, to the user equipment, a paging message, where the downlink data includes an indication that the data transmission is not required to be performed by the user plane bearer, where the paging message includes:

The receiver is further configured to receive a signaling plane data transmission request sent by the user equipment, where the signaling plane data transmission request is sent by the user equipment when it is determined that data transmission is not required by using a user plane bearer;

The transmitter is further configured to send, by the radio access network element, a first signaling plane data transmission accept message, to trigger the radio access network element to send a second signaling plane data transmission to the user equipment. Receiving the message, where the first signaling plane data transmission accept message includes: security context information and downlink data, and the second signaling plane data transmission accept message includes: the downlink data.

With reference to the fifth aspect, in a ninth implementation manner of the fifth aspect, the receiver is configured to receive a signaling plane data transmission request that is sent by the user equipment, where the signaling plane data transmission request includes: Data, the signaling plane data transmission request is sent by the user equipment when it is determined that data transmission is not required by the user plane bearer;

The device also includes:

a processor, configured to extract the uplink data from the signaling plane data transmission request, where the transmitter is further configured to send, by the radio access network element, a first signaling plane data transmission accept message, to The triggering the radio access network element to send the second signaling plane data transmission accept message to the user equipment, where the first signaling plane data transmission accept message includes: security context information.

In combination with the eighth or ninth implementation of the fifth aspect, the tenth in the fifth aspect In an implementation manner, the receiver is further configured to receive a signaling plane data transmission completion message sent by the user equipment, where the signaling plane data transmission completion message includes whether to release a signaling connection indication;

The processor is further configured to determine whether to release the signaling connection according to whether the signaling connection indication is released.

With reference to the fourth implementation manner of the fifth aspect, in the eleventh implementation manner of the fifth aspect,

The receiver is further configured to receive a delete bearer request sent by the packet data gateway. The data transmission apparatus further includes: a processor, configured to determine, when the bearer to be deleted is the last bearer of all PDN connections Whether the context information of the device or the subscription data of the user equipment does not include a default bearer indication;

The transmitter is further configured to: if the default bearer indication is not established, send a deactivation bearer request to the radio access network element, to request the radio access network element to send an RRC link reconfiguration message to the user equipment. The deactivation bearer request includes a deactivate EPS bearer context request and a no detach indication, where the RRC link reconfiguration message includes a deactivate EPS bearer context request and a no detach indication. In a sixth aspect, a data transmission apparatus is provided, including:

a transmitter, configured to send, to the mobility management network element, whether to establish a default bearer indication for the user equipment, to notify the mobility management network element to determine, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established, Sending a default bearer indication to the radio access network element;

The transmitter is configured to send data to the mobility management network element by using NAS signaling when a default bearer is not established;

The receiver is configured to receive data sent by the mobility management network element by using NAS signaling when a default bearer is not established.

With reference to the sixth aspect, in a first implementation manner of the sixth aspect, the transmitter is configured to send, by using an attach request message, a mobility management network element, whether to establish a default bearer indication for the user equipment. With reference to the first implementation manner of the sixth aspect, in a second implementation manner of the sixth aspect, the determining whether to establish a default bearer indication for the user equipment is represented by an attachment type in the attach request message;

With the foregoing implementation of the sixth aspect, in a third implementation manner of the sixth aspect, the transmitter is further configured to send a tracking area/routing area update request message to the new mobility management network element, where The tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment, so that the new mobility management network element determines whether to establish a default bearer for the user equipment.

With the foregoing implementation of the sixth aspect, in a fourth implementation manner of the sixth aspect, the transmitter is further configured to: when the user equipment determines that data transmission is not required by using a user plane bearer, The mobility management network element sends a service request to notify the mobility management network element that the user equipment does not establish a data radio bearer.

With the second implementation of the sixth aspect, in a fifth implementation manner of the sixth aspect, the receiver is further configured to receive a paging message sent by the mobility management network element, where the paging message is The data transmission indication is not required to be performed by the user plane bearer, and the mobility management network element includes, when the context information of the user equipment is determined, that the default bearer indication is not established, or the downlink data includes data that does not need to be carried by the user plane bearer. Sent when transmitting an indication.

With reference to the sixth aspect, in a sixth implementation manner of the sixth aspect, the receiver is configured to receive a paging message that is sent by the mobility management network element, where the paging message includes Performing a data transmission indication, and when the mobility management network element includes determining that the default bearer indication is not included in the context information of the user equipment, or the downlink data includes the data transmission indication not required by the user plane bearer Send

The receiver is further configured to: when the user equipment determines that data transmission is not required by the user plane bearer, send a signaling plane data transmission request to the radio access network element to request the radio access network element. Forwarding the signaling plane data transmission request to the mobility management network element;

The receiver is further configured to receive, by the radio access network element, a second signaling plane data transmission accept message, where the second signaling plane data transmission accept message is received by the radio access network element After the first signaling plane data transmission accept message sent by the mobility management network element, the first signaling plane data transmission accept message includes: security context information and the downlink data, the second signaling The face data transmission accept message includes: the downlink data.

With reference to the sixth aspect, in a seventh implementation manner of the sixth aspect, the transmitter is configured to send signaling plane data to the radio access network element when it is determined that data transmission is not required by the user plane bearer Transmitting a request to request the radio access network element to forward the signaling plane data transmission request to the mobility management network element, where the signaling plane data transmission request includes: uplink data;

The receiver is further configured to receive, by the radio access network element, a second signaling plane data transmission accept message, where the second signaling plane data transmission accept message is received by the radio access network element After the first signaling plane data transmission accept message sent by the mobility management network element is sent, the first signaling plane data transmission accept message includes: security context information.

With reference to the sixth or seventh implementation manner of the sixth aspect, in an eighth implementation manner of the sixth aspect, the transmitter is further configured to send a signaling plane data transmission to the mobility management network element. The message, the signaling plane data transmission complete message includes whether to release the signaling connection indication. In the embodiment of the present invention, the mobility management network element sends, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established, and sends a default bearer indication to the radio access network element to notify the The radio access network element is set for the user The default bearer is not established, and when the default bearer is not established, the mobility management network element performs data transmission with the user equipment by using NAS signaling.

In the embodiment of the present invention, on the one hand, the network side may select that the user equipment does not establish a default bearer, and on the other hand, when it is required to transmit data based on non-IP link service data or small data volume service, even if the network side does not have a location The user equipment establishes a default bearer, and the mobility management network element can also perform data transmission with the user equipment by using NAS signaling. Compared with the prior art, the prior art does not need to use the default bearer, and the default bearer is always in the reserved state, which causes the network resource to be wasted. The embodiment of the present invention saves network resources. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be 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.

FIG. 1 is a flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 2 is a flowchart of a data transmission method according to an embodiment of the present invention; FIG. 2 is another flowchart of a data transmission method according to an embodiment of the present invention; FIG. 3 is a data transmission method according to an embodiment of the present invention; In the flowchart of the implementation of the network attachment process;

4 is a flowchart of implementing a tracking area/routing area update process in a data transmission method according to an embodiment of the present invention;

FIG. 5 is a flowchart of an implementation of downlink data transmission in a data transmission method according to an embodiment of the present invention;

6 is a flowchart of an implementation of uplink data transmission in a data transmission method according to an embodiment of the present invention;

FIG. 7 is a flowchart of another implementation of downlink data transmission in a data transmission method according to an embodiment of the present disclosure; FIG. 8 is a flowchart of another implementation of uplink data transmission in a data transmission method according to an embodiment of the present disclosure;

FIG. 9 is a flowchart of an implementation of maintaining a network attachment by a UE in a bearer deactivation process according to a data transmission method according to an embodiment of the present invention;

FIG. 10 is a structural diagram of a data transmission apparatus according to an embodiment of the present invention; FIG. 10a is another structural diagram of a data transmission apparatus according to an embodiment of the present invention;

FIG. 10b is still another structural diagram of a data transmission apparatus according to an embodiment of the present invention; FIG.

FIG. 10c is still another structural diagram of a data transmission apparatus according to an embodiment of the present invention;

FIG. 10 is a still further structural diagram of a data transmission apparatus according to an embodiment of the present invention;

FIG. 11 is a structural diagram of another data transmission apparatus according to an embodiment of the present invention; FIG. 11 a is another structural diagram of another data transmission apparatus according to an embodiment of the present invention.

FIG. 12 is a structural diagram of still another data transmission apparatus according to an embodiment of the present invention;

FIG. 12a is still another structural diagram of still another data transmission apparatus according to an embodiment of the present invention;

FIG. 12b is another structural diagram of still another data transmission apparatus according to an embodiment of the present invention;

FIG. 13 is a structural diagram of still another data transmission apparatus according to an embodiment 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, but not all of the embodiments. Based on an embodiment of the present invention, All other embodiments obtained by a person of ordinary skill in the art without creative efforts are within the scope of the present invention.

As shown in FIG. 1 , an embodiment of the present invention provides a data transmission method, which is performed by a mobility management network element, and includes:

101. The mobility management network element acquires whether to establish a default bearer indication for the user equipment. The mobility management network element may be a mobility management entity (Mobility)

Management Entity (MME), may also be a Serving GPRS Support Node (SGSN), etc., which is also suitable for other embodiments herein.

If the mobility management network element determines that the default bearer is not established according to whether the user equipment establishes a default bearer indication, the mobility management network element sends a default bearer indication to the radio access network element. The user equipment is not notified to establish a default bearer by notifying the radio access network element.

104. When the default bearer is not established, the mobility management network element performs data transmission with the user equipment by using NAS signaling.

Optionally, as shown in FIG. 1 a, after step 102, the method may further include:

103. The mobility management network element saves not establishing a default bearer indication in context information of the user equipment. In step 104, the mobility management network element may learn, according to the context information of the user equipment, whether a default bearer has been established for the user equipment, that is, when the context information of the user equipment is saved, the default is not established. When the bearer is instructed, it can be known that the default bearer is not established. At this time, the mobility management network element performs data transmission with the user equipment by using NAS signaling. In the embodiment of the present invention, the mobility management network element sends, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established, and sends a default bearer indication to the radio access network element to notify the The radio access network element does not establish a default bearer for the user equipment, and when the default bearer is not established, the mobility management network The element performs data transmission with the user equipment through NAS signaling.

In the embodiment of the present invention, on the one hand, the network side may select that the user equipment does not establish a default bearer, and on the other hand, when it is required to transmit data based on non-IP link service data or small data volume service, even if the network side does not have a location The user equipment establishes a default bearer, and the mobility management network element can also perform data transmission with the user equipment by using NAS signaling. Compared with the prior art, the prior art does not need to use the default bearer, and the default bearer is always in the reserved state, which causes the network resource to be wasted. The embodiment of the present invention saves network resources.

As shown in FIG. 2, an embodiment of the present invention provides a data transmission method, which is performed by a user equipment, and includes:

201. The user equipment sends a mobility bearer to the mobility management network element to establish a default bearer indication for the user equipment.

After the mobility management network element receives the default bearer indication for the user equipment, if it determines that the default bearer is not established according to whether the user equipment establishes a default bearer indication, the radio access network element is not established. Send does not establish a default bearer indication.

202. When the default bearer is not established, the user equipment performs data transmission with the mobility management network element by using NAS signaling. In the embodiment of the present invention, the user equipment sends a default bearer indication to the mobility management network element, so that the mobility management network element determines whether to establish a default bearer indication for the user equipment. When the default bearer is established, the default bearer indication is not sent to the radio access network element, and when the default bearer is not established, data transmission is performed by using the NAS signaling with the mobility management network element.

In the embodiment of the present invention, on the one hand, the network side may select that the user equipment does not establish a default bearer, and on the other hand, when the user equipment needs to transmit data based on non-IP link service data or small data volume service, even if the network side does not Establishing a default bearer for the user equipment, where the user equipment also uses NAS signaling and the mobility management network element Data transfer. The embodiment of the present invention saves network resources, which avoids the problem that the default bearer is used in the prior art, and the default bearer is always in a reserved state, which causes waste of network resources. A data transmission method is described in detail below in conjunction with a specific implementation scenario. It should be noted that the UE that can be applied to the embodiment of the present invention is, for example, a UE whose primary service type is a small data service or a non-IP connection service. In the first optional implementation scenario provided by the embodiment of the present invention, when the UE performs network registration after booting, the network attaching process is triggered. With the solution provided by the embodiment of the present invention, after performing the network attach procedure, the network may select that the UE does not establish a default bearer, and the specific implementation is as follows:

As shown in FIG. 3, in a data transmission method provided by an embodiment of the present invention, the implementation steps of the network attachment process include:

301. The UE sends an attach request message to the radio access network element, where the attach request message includes whether to establish a default bearer indication for the UE.

Specifically, whether the default bearer indication is established for the user equipment by using an attachment type in the attach request message;

For example, the value of the attachment type in the attach request message is extended. If the value is 100, the default bearer indication is established when the user equipment performs EPS attachment; when the value is 101, the EPS is indicated for the user equipment. The default bearer indication is not established when the joint with IMSI is attached. The extension of the attachment type is not limited to the above-mentioned example values, and the value of the reservation can be arbitrarily defined. Or indicating whether a default bearer indication is established for the user equipment by using an additional update type in the attach request message;

For example, the second bit of the cell is defined, and this bit is used to indicate whether a default bearer is established for the user equipment during the attach procedure. When the bit is 0, it indicates that the user equipment does not establish a default bearer during the attaching process. When the bit is 1, it is attached. A default bearer is established for the user equipment during the process. Or, by using a device priority (Device Priority) in the attach request message, whether to establish a default bearer indication for the user equipment;

Or, whether the default bearer indication is established for the user equipment by using a UE Network Capability in the attach request message.

302. The radio access network element forwards the attach request message to a mobility management network element.

303. Perform an authentication/security process between the UE, the mobility management network element, and the Home Subscriber Server (HSS), and perform authentication and authentication on the UE.

This step can be referred to the existing implementation scheme, and details are not described herein again.

304. The mobility management network element sends an Update Location Request message to the HSS.

The update location request message may include UE identity information and mobility management network element identity information;

The UE identity information may be an International Mobile Subscriber Identification Number (IMSI) of the UE, or an International Mobile Equipment Identification Number (IMSI); the mobility management network element identifier information may be an SGSN Number Or MME ID, this definition is also suitable for other embodiments herein.

305. After receiving the Update Location Request message, the HS S sends an Update Location Ack message to the mobility management network element.

The update location confirmation message includes the subscription information of the UE. Optionally, the subscription information includes whether to establish a default bearer indication for the UE.

For a UE with a specific service, for example, a UE with a small data service or a non-IP connection service as the primary service type, the HS S may pre-configure in its subscription information whether to establish a default bearer indication for the UE, so as to facilitate mobility management. The network element can learn whether the default bearer needs to be established for the user equipment according to the obtained subscription information of the UE. 306. The mobility management network element receives the Update Location ACK message, for example, determining whether a default bearer needs to be established according to whether the UE includes a default bearer indication included in the subscription information of the UE.

For example, whether the default bearer indication is established for the UE and the default bearer indication included in the attach request message sent by the UE is included in the subscription information of the UE, and whether the default bearer needs to be established is determined.

Or, for example, the mobility management network element receives a context response message sent by the original mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved The establishment of a default bearer indication needs to be described, if there is a conflict between whether the default bearer indication for the UE is included in the subscription information of the UE and whether the default bearer indication is established for the UE included in the attach request message, the mobility management network The determining is based on whether the default bearer indication is set for the UE included in the attach request message.

If the mobility management network element determines to establish a default bearer according to whether the user equipment is configured to establish a default bearer, perform the following step 307 to perform a normal EPC attach process, that is, use an existing implementation scheme to establish a default bearer;

If the mobility management network element determines that the default bearer is not established according to whether the default bearer indication is set for the user equipment, save the non-establishment default bearer indication in the context information of the user equipment, and perform the following step 308 to the wireless The access network element sends a default bearer indication to notify the radio access network element that the user equipment does not establish a default bearer.

307. If the mobility management network element determines to establish a default bearer according to whether the default bearer indication is established for the user equipment, perform a normal EPC attach procedure to establish a default bearer.

308. If the mobility management network element determines, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established, the mobility management network element sends an attach accept message to the wireless access network element.

The attachment accept message includes no default bearer indication. 309. After receiving the attach accept message, the radio access network element saves the default bearer indication in the context information of the UE, and does not establish a default bearer for the user equipment.

310. The radio access network element forwards the attach accept message to the user equipment.

311. The user equipment sends an attach complete message to the radio access network element, where the EPS session management message container in the message is set to be optional, that is, the ACTIVATE DEFAULT EPS BEARER may be accepted without including the original active default EPS payload context. CONTEXT ACCEPT message;

312. The radio access network element forwards the attach completion message to the mobility management network element.

313. The mobility management network element performs data transmission with the user equipment by using NAS signaling when the default bearer is not established.

In the embodiment of the present invention, when the UE performs the network attach procedure, the mobility management network element may send, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established, and not send the default bearer indication to the radio access network element. In order to notify the radio access network element that the user equipment does not establish a default bearer.

In particular, when the UE uses the small data service or the non-IP connection service as the main service type, the default bearer does not need to be used for data transmission, and the attaching process in the prior art establishes a default bearer for all types of UEs. The embodiment may be a UE that does not need to use the default bearer for data transmission, and does not establish a default bearer, and does not need to use the default bearer when the data transmission is performed by the UE with the small data service or the non-IP connection service as the primary service type, but the default bearer is not required. The embodiment of the present invention saves network resources by being in a reserved state and causing waste of network resources. In the second optional implementation scenario of the embodiment of the present invention, after the UE completes the network attachment process, if the location of the UE changes, the tracking area/routing area update process is triggered, and the UE provides the solution provided by the embodiment of the present invention. After the tracking area/routing area update process is performed, the new mobility management network element can not only know whether the original mobility management network element has established a default bearer for the UE, but also can choose not to establish a default bearer for the UE. The implementation is as follows:

As shown in FIG. 4, in a data transmission method provided by an embodiment of the present invention, the implementation steps of the tracking area/routing area update process include:

401. The UE initiates a tracking area/routing area update request message to the radio access network element. The tracking area/routing area update request message includes whether to establish a default bearer indication for the UE.

402. The radio access network element forwards the tracking area/routing area update request message to a new mobility management network element.

403. The new mobility management network element sends a context request message to the original mobility management network element.

404. After receiving the context request message, the original mobility management network element obtains the context information of the UE, and sends a context response message to the new mobility management network element, where the context corresponding message carries no default bearer indication.

The context response message includes context information of the UE.

If the original mobility management network element does not establish a default bearer for the UE, the default bearer indication is not saved in the context information of the UE. For example, when the original mobility management network element is the mobility management network element in the embodiment shown in FIG. 3, the context information of the UE is saved without establishing a default bearer indication.

405. Perform an authentication/security process between the UE, the mobility management network element, and the HSS, and perform authentication and authentication on the UE.

406. The new mobility management network element sends a context confirmation message to the original mobility management network element.

407. The new mobility management network element sends an update location request message to the HSS.

The update location request message includes UE identification information and mobility management network element identification information.

408. The HS S sends a cancel location message to the original mobility management network element.

409. The original mobility management network element sends a cancel location confirmation message to the HSS.

410. The HS S sends an update location confirmation message to the new mobility management network element. The subscription location confirmation message may include subscription information of the UE.

411. The new mobility management network element sends a tracking area/routing area update accept message to the UE.

412. The UE sends a tracking area/routing area update complete message to the new mobility management network element.

413. The mobility management network element performs data transmission with the user equipment by using NAS signaling when the default bearer is not established.

In the embodiment of the present invention, after the UE performs the tracking area/routing area update process, the new mobility management network element can not only know whether the original mobility management network element has established a default bearer for the UE, but also may choose not to establish a default for the UE. Hosted.

In particular, when the UE uses the small data service or the non-IP connection service as the main service type, the default bearer does not need to be used for data transmission. With the solution provided by the embodiment of the present invention, after the UE performs the tracking area/routing area update process, the new mobility management network element may also be a UE that does not need to use the default bearer for data transmission, and does not establish a default bearer, and avoids the UE not. The default bearer is required, but the default bearer is always in a reserved state, which causes a waste of network resources. The embodiment of the present invention saves network resources. In the third optional implementation scenario of the embodiment of the present invention, after the foregoing first optional implementation scenario completes the network attachment process, or the foregoing second optional implementation scenario triggers the tracking area/routing area update process When the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, after receiving the downlink data from the data sender, the mobility management network element may pass the current There is NAS signaling to transmit the downlink data to the UE.

The specific implementation is as follows:

As shown in FIG. 5, in a data transmission method provided by an embodiment of the present invention, the implementation steps of downlink data transmission include:

501. The data sender sends downlink data to the mobility management network element.

The data sender may be a gateway device, or may be an MTC IWF (Interoperability Function Module for Machine Type Communication) or other terminal that transmits small data. Optionally, when the data sender can send the downlink data, the downlink data carries whether the data transmission indication needs to be performed by using a user plane bearer.

502. After receiving the downlink data, the mobility management network element sends a paging message to the radio access network element.

The mobility management network element may query whether the context information of the user equipment includes not establishing a default bearer indication. If the context information of the user equipment includes not establishing a default bearer indication, the paging message includes No need to transmit data indication through the user plane bearer;

Or, the mobility management network element determines whether the downlink data includes the data transmission indication that does not need to be carried by the user plane bearer, and if the downlink data includes the data transmission indication that does not need to be performed by the user plane bearer, the paging message includes The data transmission indication is performed by the user plane bearer.

503. The radio access network element forwards the paging message to the UE.

504. After receiving the paging message, the UE determines whether the paging message includes a data transmission indication that does not need to be performed by using a user plane bearer.

If the paging message does not include the data transmission indication by using the user plane bearer, that is, the UE may determine that the data transmission needs to be performed by using the user plane bearer, then the process goes to step 514 to initiate a PDN connection establishment process, so as to facilitate Data transmission is carried out through the user plane bearer.

If the paging message includes no data transmission indication by the user plane bearer, that is, the UE may determine that data transmission is not required by the user plane bearer, the following step 505 is continued.

505. Send a service request message to the radio access network element when the UE determines that data transmission is not required by the user plane bearer.

506. The radio access network element forwards the service request message to the mobility management network element.

507. Perform an authentication/security process between the UE, the mobility management network element, and the HSS, and perform authentication and authentication on the UE.

This step can be referred to the existing implementation scheme, and details are not described herein again. 508. The mobility management network element queries whether context information of the user equipment includes not establishing a default bearer indication.

And if the context information of the user equipment includes not establishing a default bearer indication, sending an initial context setup request to the radio access network element.

The initial context setup request includes security context information and the non-establishment default bearer indication.

509. After receiving the initial context setup request, the radio access network element does not establish a data bearer according to the non-establishment of a default bearer indication.

510. The radio access network element sends an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message includes not establishing a data radio bearer indication.

511. The UE sends an RRC connection reconfiguration complete message to the radio access network element.

512. The radio access network element sends an initial context setup response message to the mobility management network element.

513. The mobility management network element performs data transmission with the UE by using NAS signaling.

For example, the mobility management network element sends downlink data to the UE by using NAS signaling.

514. If the UE determines that data transmission needs to be performed by using a user plane bearer, the UE initiates a PDN connection establishment procedure, so as to facilitate data transmission through the user plane bearer.

This step can be referred to the existing implementation scheme, and details are not described herein again. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, when the UE needs to receive downlink data from the data sender, the mobility is established even if the network side does not establish a default bearer for the UE. The management network element may also transmit the downlink data to the UE by using existing NAS signaling after receiving downlink data from the data sender.

Compared with the prior art, it avoids whether the data transmission needs to be made in the prior art. With the default bearer, the default bearer is always in a reserved state, which causes a waste of network resources. The embodiment of the present invention saves network resources. In the fourth optional implementation scenario of the embodiment of the present invention, after the foregoing first optional implementation scenario completes the network attachment process, or the foregoing second optional implementation scenario triggers the tracking area/routing area update process When the UE needs to perform small data service or non-IP connection service, for example, the UE needs to send uplink data to the data receiver, the UE can perform uplink data transmission by using the existing NAS signaling and the mobility management network element, and The mobility management network element sends uplink data to the data receiver.

The specific implementation is as follows:

As shown in FIG. 6, in a data transmission method provided by an embodiment of the present invention, an implementation step of uplink data transmission includes:

601. When the UE sends the uplink data, determine whether the data transmission needs to be performed by using the user plane bearer.

Specifically, the UE may determine whether the data transmission needs to be performed through the user plane bearer in the following two manners:

Manner 1: The UE determines, according to the size of the data to be sent, whether data transmission needs to be performed through the user plane bearer;

For example, if the size of the data to be sent is less than or equal to the first preset value, the UE determines that data transmission by using the user plane bearer is not required, and data transmission by NAS signaling is selected; If the size of the data volume is greater than the first preset threshold, the UE selects to determine that data transmission needs to be performed by using the user plane bearer. The first preset threshold may be, for example, l kbytes. It can be understood that the first preset threshold may also be set to other values according to an actual application.

Manner 2: The UE determines, according to the frequency to be sent, whether the data needs to be transmitted through the user plane bearer;

For example, if the frequency of the data to be sent needs to be sent is less than or equal to the second preset threshold, the UE determines that data transmission by using the user plane bearer is not required, and data transmission by NAS signaling is selected; The frequency at which the data needs to be sent If the second preset threshold is greater than the second preset threshold, the UE selects to determine that the data transmission needs to be performed by using the user plane bearer. For example, the second preset value may be sent once every 10 minutes or less. It can be understood that the second preset threshold may also be set to other values according to an actual application.

It should be noted that, in this step, the UE may determine that data transmission needs to be performed through the user plane bearer, and then jump to step 612 to initiate a PDN connection establishment process, so as to facilitate data transmission through the user plane bearer.

If the UE can determine that data transmission is not required by the user plane bearer, then proceeding to the following step 602.

602. When the UE determines that data transmission is not required by the user plane bearer, send a service request message to the radio access network element.

603. The radio access network element forwards the service request message to the mobility management network element.

604. Perform an authentication/security process between the UE, the mobility management network element, and the HSS, and perform authentication and authentication on the UE.

605. The mobility management network element queries whether the context information of the user equipment includes not establishing a default bearer indication.

606. After receiving the initial context setup request, the radio access network element does not establish a data bearer according to the not establishing a default bearer indication.

607. The radio access network element sends an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message includes not establishing a data radio bearer indication.

608. The UE sends an RRC connection reconfiguration complete message to the radio access network element.

609. The radio access network element sends an initial context setup response message to the mobile Dynamic management of network elements.

610. The UE performs data transmission with the mobility management network element by using NAS signaling.

For example, the UE sends uplink data to the mobility management network element through NAS signaling.

611. After receiving the uplink data, the mobility management network element sends the uplink data to a data receiver.

612. If the UE determines that data transmission needs to be performed by using a user plane bearer, the UE initiates a PDN connection establishment procedure, so as to facilitate data transmission through the user plane bearer.

This step can be referred to the existing implementation scheme, and details are not described herein again. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, when the UE needs to send uplink data to the data receiver, the UE may pass the NAS even if the network side does not establish a default bearer for the UE. The signaling and the mobility management network element perform uplink data transmission, and the mobility management network element sends the uplink data to the data receiver.

Compared with the prior art, the prior art avoids the problem that the default bearer is used, and the default bearer is always in the reserved state, which causes the network resources to be wasted. The embodiment of the present invention saves network resources. In the fifth optional implementation scenario of the embodiment of the present invention, after the foregoing first optional implementation scenario completes the network attachment process, or the foregoing second optional implementation scenario triggers the tracking area/routing area update process When the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, after receiving the downlink data from the data sender, the mobility management network element can pass the new NAS signaling (signaling plane data transmission accept message) transmits the downlink data to the UE.

The specific implementation is as follows: As shown in FIG. 7, in a data transmission method provided by an embodiment of the present invention, the implementation steps of downlink data transmission include:

701. The data sender sends downlink data to the mobility management network element.

The data sender may be a gateway device, or may be an MTC IWF (Interoperability Function Module for Machine Type Communication) or other terminal that transmits small data.

Optionally, when the data sender can send the downlink data, whether the data transmission indication needs to be performed by the user plane bearer is carried in the downlink data.

702. After receiving the downlink data, the mobility management network element sends a paging message to the radio access network element.

703. The radio access network element forwards the paging message to the UE.

704. After receiving the paging message, the UE determines whether the paging message includes a data transmission indication that does not need to be performed by using a user plane bearer.

If the paging message does not include the data transmission indication by using the user plane bearer, that is, the UE may determine that data transmission needs to be performed by using the user plane bearer, then the process goes to step 712 to initiate a PDN connection establishment process, so as to facilitate Data transmission is carried out through the user plane bearer.

If the paging message includes no data transmission indication by using the user plane bearer, that is, the UE may determine that data transmission is not required by the user plane bearer, the following step 705 is continued.

705. When the UE determines that data transmission is not required by the user plane bearer, send a signaling plane data transmission request to the radio access network element. It should be noted that the signaling plane data transmission request is a new NAS signaling provided by an embodiment of the present invention.

706. The radio access network element forwards the signaling plane data transmission request to the mobility management network element.

707. Perform an authentication/security process between the UE, the mobility management network element, and the HSS, and perform authentication and authentication on the UE.

708. The mobility management network element sends a first signaling plane data transmission accept message to the radio access network element.

The first signaling plane data transmission accept message includes: security context information and downlink data.

709. The radio access network element sends a second signaling plane data transmission accept message to the user equipment.

The second signaling plane data transmission accept message includes: the downlink data. It should be noted that the first signaling plane data transmission accept message and the second signaling plane data transmission accept message are a new NAS signaling provided by the embodiment of the present invention.

710. The UE receives the second signaling plane data transmission accept message, and may obtain downlink data from the UE.

The UE may also determine whether it is still necessary to continue to use the signaling connection, and send a signaling plane data transmission complete message to the radio access network element, the signaling plane data transmission completion message including whether to release the signaling connection indication.

711. The radio access network element forwards the signaling plane data transmission complete message to the mobility management network element.

After receiving the signaling plane data transmission complete message, the mobility management network element may determine whether to release the signaling connection according to whether to release the signaling connection indication.

712. If the UE determines that data transmission needs to be performed by using a user plane bearer, the UE initiates a PDN connection establishment procedure, so as to facilitate data transmission by using a user plane bearer.

This step can be referred to the existing implementation scheme, and details are not described herein again. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, even if the network side does not establish a default bearer for the UE, the mobility management. The network element may also transmit the downlink data to the UE by using new NAS signaling after receiving downlink data from the data sender.

Compared with the prior art, the prior art avoids the problem that the default bearer is used, and the default bearer is always in the reserved state, which causes the network resources to be wasted. The embodiment of the present invention saves network resources. In the sixth optional implementation scenario of the embodiment of the present invention, after the foregoing first optional implementation scenario completes the network attachment process, or the foregoing second optional implementation scenario triggers the tracking area/routing area update process When the UE needs to perform small data service or non-IP connection service, for example, the UE needs to send uplink data to the data receiver, the UE may perform the new NAS signaling (signaling surface data transmission request) and the mobility management network element. The transmission of the uplink data, and the uplink management data is sent by the mobility management network element to the data receiver.

The specific implementation is as follows:

As shown in FIG. 8, in the data transmission method provided by the embodiment of the present invention, the implementation steps of the uplink data transmission include:

801. When the UE sends the uplink data, determine whether the data transmission needs to be performed by using the user plane bearer.

For example, if the size of the to-be-sent data amount is less than or equal to the first preset threshold, the UE determines that data transmission by using the user plane bearer is not required, and data transmission by NAS signaling is selected; if the data to be sent is to be sent The size of the quantity is greater than the first pre- If the value is set, the UE chooses to determine that the data transmission needs to be performed by the user plane bearer. The first preset threshold may be, for example, lk bytes. It can be understood that the first preset threshold may also be set to other values according to an actual application.

For example, if the frequency of the data to be sent needs to be sent is less than or equal to the second preset threshold, the UE determines that data transmission by using the user plane bearer is not required, and data transmission by NAS signaling is selected; If the frequency that the data needs to be sent is greater than the second preset threshold, the UE selects to determine that the data transmission needs to be performed by using the user plane bearer. For example, the second preset threshold may be sent once every 10 minutes. It can be understood that the second preset threshold may also be set to other values according to the actual application.

It should be noted that, in this step, the UE may determine that data transmission needs to be performed through the user plane bearer, and then jump to step 811 to initiate a PDN connection establishment process, so as to facilitate data transmission through the user plane bearer.

If the UE can determine that data transmission is not required by the user plane bearer, then proceeding to the following step 802.

802. When the UE determines that data transmission is not required by the user plane bearer, send a signaling plane data transmission request to the radio access network element.

The signaling plane data transmission request includes: uplink data.

803. The radio access network element forwards the signaling plane data transmission request to the mobility management network element.

804. Perform an authentication/security process between the UE, the mobility management network element, and the HSS, and perform authentication and authentication on the UE.

805. The mobility management network element extracts the uplink data from the signaling plane data transmission request.

806. The mobility management network element sends the uplink data to the data receiver. 807. The mobility management network element sends a first signaling plane data transmission accept message to the radio access network element.

The first signaling plane data transmission accept message includes: security context information.

808. The radio access network element sends a second signaling plane data transmission accept message to the user equipment.

809. After receiving the second signaling plane data transmission accept message, the UE may further determine whether it is still necessary to continue to use the signaling connection, and send a signaling plane data transmission complete message to the radio access network element, where the The face data transmission completion message includes whether to release the signaling connection indication.

810. The radio access network element forwards the signaling plane data transmission complete message to the mobility management network element.

811. If the UE determines that data transmission needs to be performed by using a user plane bearer, the UE initiates a PDN connection establishment procedure, so as to facilitate data transmission by using a user plane bearer.

This step can be referred to the existing implementation scheme, and details are not described herein again. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to send uplink data to the data receiver, and the UE can pass the new NAS even if the network side does not establish a default bearer for the UE. The signaling and the mobility management network element perform uplink data transmission, and the mobility management network element sends the uplink data to the data receiver.

The embodiment of the present invention saves network resources, which avoids the problem that the default bearer is used in the prior art, and the default bearer is always in a reserved state, which causes waste of network resources. In the seventh optional implementation scenario of the embodiment of the present invention, the foregoing first option is optional. After the implementation scenario completes the network attachment process, or after the second optional implementation scenario triggers the tracking area/routing area update process, or after the third-six implementation scenarios complete the data transmission, when the network releases all PDNs In the bearer deactivation process, the UE may remain in the network attachment state even if the bearer to be deactivated is the last bearer of all PDN connections.

The specific implementation is as follows:

As shown in FIG. 9, in the data transmission method provided by the embodiment of the present invention, the implementation steps of the UE to maintain network attachment in the bearer deactivation process include:

901. The mobility management network element sends a delete bearer command to the serving gateway to receive the specified bearer when receiving the release indication of the radio access network element.

902. The serving gateway forwards the delete bearer command to a packet data gateway.

903. The packet data gateway sends a delete bearer request to the packet data gateway.

904. The serving gateway forwards the delete bearer request to the mobility management network element.

905. The mobility management network element determines whether the bearer to be deleted is the last bearer of all PDN connections.

If the bearer to be deleted is not the last bearer of all PDN connections, then go to step 907 to perform an operation of deactivating the bearer but not attaching;

If the bearer to be deleted is the last bearer of all the PDN connections, it is determined whether the context information of the user equipment or the subscription data of the user equipment does not include the default bearer indication.

If the default bearer indication is not included, perform the following step 906 to perform the detach operation;

If the default bearer indication is not established, the following step 907 is performed to send a deactivation bearer request to the radio access network element to request the radio access network element to send an RRC link reconfiguration message to the user equipment.

906. Perform a de-attachment process.

This step can be referred to the existing implementation scheme, and details are not described herein again. 907. When the to-be-deleted bearer is the last bearer of all PDN connections, and the context information of the user equipment or the subscription data of the user equipment includes not establishing a default bearer indication, sending a deactivated bearer to the radio access network element. request.

The deactivation bearer request includes a deactivated EPS bearer context request and a no detach indication, and the RRC link reconfiguration message includes a deactivate EPS bearer context request and a no detach indication.

908. The radio access network element forwards the RRC connection reconfiguration message to the

UE.

909. The UE sends an RRC connection reconfiguration complete message to the radio access network element.

910. The radio access network element sends a deactivation bearer response to the mobility management network element.

911. The UE sends a deactivated EPS bearer context accept message to the radio access network element.

912. The radio access network element forwards the deactivated EPS bearer context accept message to the mobility access network element.

913. The mobility management network element sends a delete bearer response message to the serving gateway.

914. Perform a signaling connection release procedure between the UE, the radio access network element, and the mobility management network element.

This step can be referred to the existing implementation scheme, and details are not described herein again. In the embodiment of the present invention, when the UE closes the data connection and triggers the bearer deactivation process, if the PDN connection to be deleted is the last PDN connection, even if the network side does not establish a default bearer for the UE, the UE may remain in the network attachment state. . The embodiment of the present invention further provides a data transmission device, which may be a mobility management network element, as shown in FIG.

The obtaining module 100 is configured to acquire whether a default bearer indication is established for the user equipment. The sending module 101 is configured to: if the default bearer is not established according to whether the user equipment is configured to establish a default bearer indication, send a default bearer indication to the radio access network element;

The transmitting module 103 is configured to perform data transmission with the user equipment by using NAS signaling when the default bearer is not established. Optionally, the mobility management network element may further include: a storage module 102, configured to save, in the context information of the user equipment, the non-establishment default bearer indication. In the embodiment of the present invention, the mobility management When the network element determines that the default bearer is not established for the user equipment, the network element sends a default bearer indication to the radio access network element to notify the radio access network element that the user equipment is not Establishing a default bearer, and when the default bearer is not established, the mobility management network element performs data transmission with the user equipment by using NAS signaling.

In the embodiment of the present invention, on the one hand, the network side may select that the user equipment does not establish a default bearer, and on the other hand, when it is required to transmit data based on non-IP link service data or small data volume service, even if the network side does not have a location The user equipment establishes a default bearer, and the mobility management network element can also perform data transmission with the user equipment by using NAS signaling. Compared with the prior art, the prior art does not need to use the default bearer, and the default bearer is always in the reserved state, which causes the network resource to be wasted. The embodiment of the present invention saves network resources. In the embodiment of the present invention, when the UE starts to register the network, the UE triggers the network attach procedure. With the solution provided by the embodiment of the present invention, after performing the network attach procedure, the mobility management network element may select that the UE does not establish a default bearer.

The specific implementation is as follows:

Optionally, the obtaining module 100 is specifically configured to: receive, by the user equipment, whether a default bearer indication is established for the user equipment by using an attach request message;

Specifically, whether the default bearer indication is established for the user equipment by using the attach request The type of attachment in the message;

Optionally, the acquiring module 100 is specifically configured to receive, by the user equipment, whether the user equipment establishes a default bearer indication by using an attach request message, and the user that is sent by the home subscriber subscription server by updating the location confirmation message. The subscription information of the device, the subscription information includes whether to establish a default bearer indication for the user equipment; or, optionally, the obtaining module 100 is specifically configured to receive a context response message sent by the original mobility management network element, where The context response message includes the context information of the user equipment, and the context information of the user equipment is saved without establishing a default bearer indication.

Further, the sending module 101 is specifically configured to send, by using an attach accept message, a default bearer indication to the radio access network element.

For details, refer to the description of the mobility management network element in the data transmission method shown in Figure 3. In the embodiment of the present invention, after the UE completes the network attachment process, if the location of the UE changes, the tracking area/routing area update process is triggered, and the UE provides the tracking area/routing area update by using the solution provided by the embodiment of the present invention. After the process, the new mobility management network element can not only know whether the original mobility management network element has established a default bearer for the UE, but also can choose not to establish a default bearer for the UE.

The specific implementation is as follows:

The data transmission device, as shown in FIG. 10a, further includes:

The receiving module 105a is configured to receive a context request message sent by the new mobility management network element, where the context request message is received by the new mobility management network element. After the tracking area/routing area update request sent by the user equipment is sent, the tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment;

The sending module 101 is further configured to send a context response message to the new mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved. The default bearer indication is such that the new mobility management network element determines whether to establish a default bearer for the user equipment.

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to send uplink data to the data receiver, the UE may perform uplink data by using the existing NAS signaling and the mobility management network element. And transmitting, by the mobility management network element, uplink data to the data receiver.

The specific implementation is as follows:

As shown in FIG. 10b, the data transmission device further includes:

The receiving module 105b is configured to receive a service request sent by the user equipment, where the service request is sent by the user equipment when it is determined that data transmission is not required by using a user plane bearer;

The querying module 106 is configured to query whether the context information of the user equipment does not establish a default bearer indication.

The sending module 101 is further configured to: send an initial context establishment request to the radio access network element to notify the wireless connection if the querying module that the querying module includes that the user equipment does not establish a default bearer indication The inbound network element does not establish a data radio bearer for the user equipment, and sends an RRC connection reconfiguration message to the user equipment, where the initial context setup request includes security context information and the non-establishment default bearer indication, the RRC The connection reconfiguration message includes not establishing a data radio bearer indication.

For the function implementation of the data transmission apparatus shown in FIG. 10b, reference may also be made to the description of the mobility management network element in the data transmission method shown in FIG. 6. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, the mobility management network element receives downlink data from the data sender. Thereafter, the downlink data may be transmitted to the UE by using existing NAS signaling.

The specific implementation is as follows:

The sending module 101 is further configured to: if the context information of the user equipment includes not setting a default bearer indication, or if the downlink data includes a data transmission indication that does not need to be carried by the user plane bearer, sending, to the user equipment, Paging message

For details, refer to the description of the mobility management network element in the data transmission method shown in Figure 5. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, the mobility management network element receives downlink data from the data sender. Thereafter, the downlink data may be transmitted to the UE through a new NAS signaling (signaling plane data transmission accept message).

The specific implementation is as follows:

Specifically, the transmitting module 104 is specifically configured to: when the context information of the user equipment includes not establishing a default bearer indication, or if the downlink data includes an indication that the data transmission is not required by the user plane bearer, The user equipment sends a paging message, where the paging message includes a data transmission indication that does not need to be carried by the user plane bearer; the transmission module 104 is further configured to receive a signaling plane data transmission request sent by the user equipment, where the The face data transmission request is determined by the user equipment to be sent when data transmission is not required by the user plane bearer;

The transmitting module 104 is further configured to send, by the radio access network element, a first signaling plane data transmission accept message, to trigger the radio access network element to send second signaling plane data to the user equipment. Transmitting an accept message, where the first signaling plane data The transmission accept message includes: security context information and downlink data, and the second signaling plane data transmission accept message includes: the downlink data.

For details, refer to the description of the mobility management network element in the data transmission method shown in Figure 7. The transmission module 104 is specifically configured to receive a signaling plane data transmission request sent by the user equipment, where the signaling plane data transmission request includes: uplink data, where the signaling plane data transmission request is determined by the user equipment It does not need to be sent when data transmission is carried out through the user plane bearer;

As shown in FIG. 10c, the device further includes:

The extracting module 107 is configured to extract the uplink data from the signaling plane data transmission request;

The transmitting module 104 is further configured to send, by the radio access network element, a first signaling plane data transmission accept message, to trigger the radio access network element to send second signaling plane data to the user equipment. And transmitting the accept message, where the first signaling plane data transmission accept message includes: security context information.

Further, as shown in FIG. 10c, the method further includes:

The receiving module 105c is configured to receive a signaling plane data transmission complete message sent by the user equipment, where the signaling plane data transmission complete message includes whether to release a signaling connection indication;

The determining module 108 is configured to determine whether to release the signaling connection according to whether the signaling connection indication is released.

For the function implementation of the data transmission apparatus shown in FIG. 10c, reference may also be made to the description of the mobility management network element in the data transmission method shown in FIG. In the embodiment of the present invention, when the UE closes the data connection, for example, when the UE does not need to perform the small data service or the non-IP connection service, the data connection may be closed, and the bearer deactivation process is triggered. In the bearer deactivation process, when the PDN connection to be deleted is the last PDN connection, even if it is not established for the UE. The default bearer can also keep the UE in the network attached state.

The specific implementation is as follows:

The data transmission device, as shown in FIG. 10d, further includes:

The receiving module 105d is configured to receive a delete bearer request sent by the packet data gateway, and the determining module 109 is configured to determine, when the PDN connection to be deleted is the last PDN connection, the context information of the user equipment or the subscription data of the user equipment. Whether to include not establishing a default bearer indication;

The sending module 101 is further configured to: if the default bearer indication is not established, send a deactivation bearer request to the radio access network element, to request the radio access network element to send an RRC link reconfiguration to the user equipment. The message, where the deactivation bearer request includes a deactivate EPS bearer context request and a no detach indication, the RRC link reconfiguration message includes a deactivate EPS bearer context request and a no detach indication.

For the function implementation of the data transmission apparatus shown in FIG. 10d, reference may also be made to the description of the mobility management network element in the data transmission method shown in FIG. The embodiment of the present invention further provides a data transmission device, which may be a user device, as shown in FIG.

The sending module 110 is configured to send, to the mobility management network element, whether to establish a default bearer indication for the user equipment, to notify the mobility management network element to determine, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established. Sending a default bearer indication to the radio access network element;

The transmission module 1 11 is configured to perform data transmission with the mobility management network element by using NAS signaling when the default bearer is not established. In the embodiment of the present invention, the user equipment sends a default bearer indication to the mobility management network element, so that the mobility management network element determines whether to establish a default bearer indication for the user equipment. When the default bearer is established, the default bearer indication is not sent to the radio access network element, and when the default bearer is not established, data transmission is performed by using the NAS signaling with the mobility management network element. In the embodiment of the present invention, on the one hand, the network side may select that the user equipment does not establish a default bearer, and on the other hand, when the user equipment needs to transmit data based on non-IP link service data or small data volume service, even if the network side does not Establishing a default bearer for the user equipment, where the user equipment also performs data transmission with the mobility management network element by using NAS signaling. The embodiment of the present invention saves network resources, which avoids the problem that the default bearer is used in the prior art, and the default bearer is always in a reserved state, which causes waste of network resources. In the embodiment of the present invention, when the UE starts to register the network, the UE triggers the network attach procedure. With the solution provided by the embodiment of the present invention, after performing the network attach procedure, the network may select that the UE does not establish a default bearer.

The specific implementation is as follows:

The sending module 110 is specifically configured to send, by using an attach request message, a mobility bearer to establish a default bearer indication for the user equipment. Whether the default bearer indication is established for the user equipment is indicated by an attachment type in the attach request message;

For details, refer to the description of the user equipment in the data transmission method shown in Figure 3. In the embodiment of the present invention, after the UE completes the network attachment process, if the location of the UE changes, the tracking area/routing area update process is triggered, and the UE provides the tracking area/routing area update by using the solution provided by the embodiment of the present invention. After the process, the new mobility management network element can not only know whether the original mobility management network element has established a default bearer for the UE, but also can choose not to establish a default bearer for the UE.

The specific implementation is as follows: The sending module 110 is further configured to send a tracking area/routing area update request message to the new mobility management network element, where the tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment, so that The new mobility management network element determines whether a default bearer is established for the user equipment.

For details, refer to the description of the user equipment in the data transmission method shown in FIG. 4. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to send uplink data to the data receiver, the UE may perform uplink data by using the existing NAS signaling and the mobility management network element. And transmitting, by the mobility management network element, uplink data to the data receiver.

The sending module 110 is further configured to: when the user equipment determines that data transmission is not required by the user plane bearer, send a service request to the mobility management network element to notify the mobility management network element as the user The device does not establish a data radio bearer.

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. 6. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, the mobility management network element receives downlink data from the data sender. Thereafter, the downlink data may be transmitted to the UE by using existing NAS signaling.

The specific implementation is as follows:

The data transmission device, as shown in FIG. 11a, further includes:

The receiving module 112 a is configured to receive a paging message sent by the mobility management network element, where the paging message includes an indication that the data transmission is not required by the user plane bearer, and the mobility management network element determines the The context information of the user equipment includes when the default bearer indication is not established, or when the downlink data includes the data transmission indication without using the user plane bearer.

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. 5. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, the mobility management network element receives downlink data from the data sender. Thereafter, the downlink data may be transmitted to the UE through a new NAS signaling (signaling plane data transmission accept message).

The specific implementation is as follows:

The transmission module 11 1 is specifically configured to receive a paging message sent by the mobility management network element, where the paging message includes a data transmission indication that does not need to be carried by a user plane bearer, and is configured by the mobility management network element. Determining that the context information of the user equipment includes not setting a default bearer indication, or the downlink data includes sending when the data transmission indication is not required by the user plane bearer;

The transmission module 11 1 is further configured to: when the user equipment determines that data transmission is not required by the user plane bearer, send a signaling plane data transmission request to the radio access network element to request the radio access The network element forwards the signaling plane data transmission request to the mobility management network element;

The transmitting module 11 1 is further configured to receive, by the radio access network element, a second signaling plane data transmission accept message, where the second signaling plane data transmission accept message is used by the radio access network After receiving the first signaling plane data transmission accept message sent by the mobility management network element, the first signaling plane data transmission accept message includes: security context information and the downlink data, the second The signaling plane data transmission accept message includes: the downlink data.

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. 7. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to send uplink data to the data receiver, the UE may use the new NAS signaling (signal plane data transmission request) and the mobile The mobility management network element performs uplink data transmission, and the mobility management network element sends uplink data to the data receiver. The specific implementation is as follows:

The transmitting module 11 1 is specifically configured to: when it is determined that data transmission is not required by the user plane bearer, send a signaling plane data transmission request to the radio access network element, to request the radio access network element to forward the The signaling plane data transmission request is sent to the mobility management network element, and the signaling plane data transmission request includes: uplink data;

The transmitting module 11 1 is further configured to receive, by the radio access network element, a second signaling plane data transmission accept message, where the second signaling plane data transmission accept message is used by the radio access network After receiving the first signaling plane data transmission accept message sent by the mobility management network element, the first signaling plane data transmission accept message includes: security context information.

Further, the sending module 110 is further configured to send a signaling plane data transmission completion message to the mobility management network element, where the signaling plane data transmission completion message includes whether to release the signaling connection indication.

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. 8. The embodiment of the present invention further provides a data transmission device, which may be a mobility management network element. As shown in FIG. 12, the method specifically includes:

The receiver 123 is configured to: determine whether to establish a default bearer indication for the user equipment, and the transmitter 122 is configured to: if the default bearer is not established according to whether the default bearer indication is established for the user equipment, sending to the radio access network element is not established. Default bearer indication;

The receiver 123 is further configured to receive data sent by the user equipment by using a NAS signaling when the default bearer is not established;

The transmitter 122 is further configured to send data to the user equipment by using a NAS signaling when a default bearer is not established.

In the embodiment of the present invention, the mobility management network element sends, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established, and sends a default bearer indication to the radio access network element to notify the The radio access network element is set for the user The default bearer is not established, and when the default bearer is not established, the mobility management network element performs data transmission with the user equipment by using NAS signaling.

It should be noted that the driving circuit 12001 is configured to provide drivers for each hardware in the mobility management network element so that each hardware can work normally.

In addition, the various hardware components of the mobility management network element are coupled together by a bus system 12000, which includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity, the various buses are labeled as Bus System 12000 in Figure 12. In the embodiment of the present invention, when the UE starts to register the network, the UE triggers the network attach procedure. With the solution provided by the embodiment of the present invention, after performing the network attach procedure, the mobility management network element may select that the UE does not establish a default load.

The specific implementation is as follows:

Optionally, the receiver is specifically configured to receive, by using the attach request message, the user equipment to establish a default bearer indication for the user equipment;

Specifically, whether the default bearer indication is established for the user equipment is indicated by an attachment type in the attach request message;

Or whether the default bearer indication is established for the user equipment by using the attach request User equipment network capability representation in the interest rate.

Optionally, the receiver is configured to receive, by using the attach request message, whether the user equipment establishes a default bearer indication for the user equipment, and the user equipment that is sent by the home subscriber subscription server by updating the location confirmation message. The subscription information, the subscription information includes whether a default bearer indication is established for the user equipment;

Or, optionally, the receiver is configured to receive a context response message sent by the original mobility management network element, where the context response message includes context information of the user equipment, where the context information of the user equipment is saved. There is no default bearer indication established.

Further, the transmitter is specifically configured to send a default bearer indication to the wireless access network element by using an attach accept message.

For details, refer to the description of the mobility management network element in the data transmission method shown in Figure 3.

As shown in FIG. 12a, the data transmission apparatus further includes: a memory 124, configured to save, in the context information of the user equipment, that the default bearer indication is not established. In the embodiment of the present invention, after the UE completes the network attachment process, if the location of the UE changes, the tracking area/routing area update process is triggered, and the UE provides the tracking area/routing area update by using the solution provided by the embodiment of the present invention. After the process, the new mobility management network element can not only know whether the original mobility management network element has established a default bearer for the UE, but also can choose not to establish a default bearer for the UE.

The specific implementation is as follows:

The receiver is further configured to receive a context request message sent by a new mobility management network element, where the context request message receives, by the new mobility management network element, a tracking area/routing area update request sent by the user equipment And sending, the tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment;

The transmitter is further configured to send a context response message to the new mobility management network element, where the context response message includes context information of the user equipment, and the context information of the user equipment is saved without establishing a default. Carrying instructions to make The new mobility management network element determines whether a default bearer is established for the user equipment.

The specific implementation is as follows:

The receiver is further configured to receive a service request sent by the user equipment, where the service request is sent by the user equipment when it is determined that data transmission is not required by using a user plane bearer;

As shown in FIG. 12b, the data transmission apparatus further includes: a processor 121, configured to query whether the context information of the user equipment includes not establishing a default bearer indication; and the transmitter is further configured to: if the query module When the context information of the user equipment is not included, the initial context setup request is sent to the radio access network element, to notify the radio access network element that the radio equipment is not established by the radio access network element. Sending an RRC connection reconfiguration message to the user equipment, where the initial context setup request includes security context information and the non-establishment default bearer indication, and the RRC connection reconfiguration message includes not establishing a data radio bearer indication.

See also the description of the mobility management network element in the data transmission method shown in FIG. 6. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to receive downlink data from the data sender, the mobility management network element receives downlink data from the data sender. Thereafter, the downlink data may be transmitted to the UE by using existing NAS signaling.

The specific implementation is as follows:

The transmitter is further configured to: if the context information of the user equipment includes When the default bearer indication is set, or if the downlink data includes an indication that the data transmission is not required by the user plane bearer, the paging message is sent to the user equipment;

The specific implementation is as follows:

The transmitter is specifically configured to: when the context information of the user equipment includes not establishing a default bearer indication, or send the homing to the user equipment if the downlink data includes an indication that the data transmission is not required by the user plane bearer Calling the message, the paging message includes an indication that the data transmission is not required by the user plane bearer;

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. 7. Further, the receiver is specifically configured to receive a signaling plane data transmission request sent by the user equipment, where the signaling plane data transmission request includes: uplink data, The signaling plane data transmission request is sent by the user equipment when it is determined that data transmission is not required by the user plane bearer;

The device also includes:

a processor, configured to extract the uplink data from the signaling plane data transmission request, where the transmitter is further configured to send, by the radio access network element, a first signaling plane data transmission accept message, to The triggering the radio access network element to send the second signaling plane data transmission accept message to the user equipment, where the first signaling plane data transmission accept message includes: security context information. Further, the receiver is further configured to receive a signaling plane data transmission completion message sent by the user equipment, where the signaling plane data transmission completion message includes whether to release a signaling connection indication;

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. 8. In the embodiment of the present invention, when the UE closes the data connection, for example, when the UE does not need to perform the small data service or the non-IP connection service, the data connection may be closed, and the bearer deactivation process is triggered. In the bearer deactivation process, when the PDN connection to be deleted is the last PDN connection, the UE may remain in the network attachment state even if the default bearer is not established for the UE.

The specific implementation is as follows:

The transmitter is further configured to: if the default bearer indication is not established, send a deactivation bearer request to the radio access network element, to request the radio access network element to use the The user equipment sends an RRC link reconfiguration message, where the deactivation bearer request includes a deactivate EPS bearer context request and a no detach indication, and the RRC link reconfiguration message includes a deactivate EPS bearer context request and a no detach indication.

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. The embodiment of the present invention further provides a data transmission device, which may be a user device, as shown in FIG.

The transmitter 132 is configured to send, to the mobility management network element, whether to establish a default bearer indication for the user equipment, to notify the mobility management network element to determine, according to whether the default bearer indication is established for the user equipment, that the default bearer is not established. Sending a default bearer indication to the radio access network element;

The transmitter 132 is configured to send data to the mobility management network element by using NAS signaling when the default bearer is not established;

The receiver 133 is configured to receive data sent by the mobility management network element by using NAS signaling when the default bearer is not established.

In the embodiment of the present invention, the user equipment sends a default bearer indication to the mobility management network element, so that the mobility management network element determines whether to establish a default bearer indication for the user equipment. When the default bearer is established, the default bearer indication is not sent to the radio access network element, and when the default bearer is not established, data transmission is performed by using the NAS signaling with the mobility management network element.

In the embodiment of the present invention, on the one hand, the network side may select that the user equipment does not establish a default bearer, and on the other hand, when the user equipment needs to transmit data based on non-IP link service data or small data volume service, even if the network side does not Establishing a default bearer for the user equipment, where the user equipment also performs data transmission with the mobility management network element by using NAS signaling. The embodiment of the present invention saves network resources, which avoids the problem that the default bearer is used in the prior art, and the default bearer is always in a reserved state, which causes waste of network resources. It should be noted that the driving circuit 13001 is configured to provide driving for each hardware in the user equipment so that each hardware can work normally.

In addition, the various hardware components of the user equipment are coupled together by a bus system 13000, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, the various buses are labeled as bus system 13000 in Figure 13. In the embodiment of the present invention, when the UE starts to register the network, the UE triggers the network attach procedure. With the solution provided by the embodiment of the present invention, after the UE performs the network attach procedure, the network side may select that the UE does not establish a default bearer.

The specific implementation is as follows:

The transmitter is specifically configured to send, by using an attach request message, a mobility bearer to establish a default bearer indication for the user equipment.

The specific implementation is as follows: The transmitter is further configured to send a tracking area/routing area update request message to the new mobility management network element, where the tracking area/routing area update request message includes whether to establish a default bearer indication for the user equipment, so that the The new mobility management network element determines whether a default bearer is established for the user equipment.

The transmitter is further configured to: when the user equipment determines that data transmission is not required by the user plane bearer, send a service request to the mobility management network element to notify the mobility management network element as the user equipment No data radio bearers are established.

The specific implementation is as follows:

The receiver is further configured to receive a paging message sent by the mobility management network element, where the paging message includes a data transmission indication that does not need to be carried by a user plane bearer, and is determined by the mobility management network element. The context information of the user equipment includes when the default bearer indication is not established, or when the downlink data includes the data transmission indication without using the user plane bearer.

The specific implementation is as follows:

The receiver is specifically configured to receive a paging message sent by the mobility management network element, where the paging message includes an indication that data transmission is not required by using a user plane bearer, and is determined by the mobility management network element. The context information of the user equipment includes: when the default bearer indication is not established, or when the downlink data includes the data transmission indication without using the user plane bearer;

The receiver is further configured to receive, by the radio access network element, a second signaling plane data transmission accept message, where the second signaling plane data transmission accept message is received by the radio access network element And sending, after the first signaling plane data transmission accept message sent by the mobility management network element, the first signaling plane data transmission accept message includes: security context information and the downlink data, the second signaling The face data transmission accept message includes: the downlink data.

For details, refer to the description of the mobility management network element in the data transmission method shown in Figure 7. In the embodiment of the present invention, when the UE needs to perform small data service or non-IP connection service, for example, the UE needs to send uplink data to the data receiver, the UE may use the new NAS signaling (signal plane data transmission request) and the mobile The mobility management network element performs uplink data transmission, and the mobility management network element sends uplink data to the data receiver.

The specific implementation is as follows: The transmitter is specifically configured to send a signaling plane data transmission request to the radio access network element when it is determined that data transmission is not required by the user plane bearer, to request the radio access network element to forward the signaling The data transmission request is sent to the mobility management network element, and the signaling plane data transmission request includes: uplink data;

Further, the transmitter is further configured to send a signaling plane data transmission completion message to the mobility management network element, where the signaling plane data transmission completion message includes whether to release the signaling connection indication.

For details, refer to the description of the mobility management network element in the data transmission method shown in FIG. 8. It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above functional assignments may be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

claims

1. A data transmission method, characterized by including:

The mobility management network element obtains an indication of whether to establish a default bearer for the user equipment; if the mobility management network element determines not to establish a default bearer based on the indication of whether to establish a default bearer for the user equipment, the mobility management network element sends a Not Established message to the wireless access network element. Default bearer indication;

When a default bearer is not established, the mobility management network element performs data transmission with the user equipment through NAS signaling.

2. The method according to claim 1, characterized in that the mobility management network element obtains an indication of whether to establish a default bearer for the user equipment, including:

The mobility management network element receives an indication of whether to establish a default bearer for the user equipment sent by the user equipment through the attachment request message;

Alternatively, the mobility management network element receives the indication of whether to establish a default bearer for the user equipment sent by the user equipment through the attachment request message and the subscription information of the user equipment sent by the home user subscription server through the update location confirmation message. , the subscription information includes an indication of whether to establish a default bearer for the user equipment;

Alternatively, the mobility management network element receives a context response message sent by the original mobility management network element. The context response message includes the context information of the user equipment. The context information of the user equipment stores a message that no default bearer is established. instruct.

3. The method according to claim 2, characterized in that,

The indication of whether to establish a default bearer for the user equipment is indicated by the attachment type in the attachment request message;

Alternatively, the indication of whether to establish a default bearer for the user equipment is indicated by the additional update type in the attach request message;

Alternatively, the indication of whether to establish a default bearer for the user equipment is indicated by the device priority in the attach request message;

Alternatively, the indication of whether to establish a default bearer for the user equipment is represented by the network capability of the user equipment in the attach request message.

4. The method according to any one of claims 1 to 3, characterized in that: the moving The mobility management network element sends an indication not to establish a default bearer to the wireless access network element, including: the mobility management network element sends an indication not to establish a default bearer to the wireless access network element through an attachment accept message.

5. The method according to any one of claims 1 to 4, further comprising: the mobility management network element saving the indication of not establishing a default bearer in the context information of the user equipment.

6. The method according to claim 5, further comprising: the mobility management network element receiving a context request message sent by a new mobility management network element, the context request message being sent by the new mobility management network element. The network element sends the tracking area/routing area update request after receiving it from the user equipment. The tracking area/routing area update request message includes an indication of whether to establish a default bearer for the user equipment;

The context response message sent by the mobility management network element to the new mobility management network element, the context response message includes the context information of the user equipment, and the context information of the user equipment stores a default bearer not established Indicate, so that the new mobility management network element determines whether to establish a default bearer for the user equipment.

7. The method according to claim 5, characterized in that, when the mobility management network element does not establish a default bearer, before performing data transmission with the user equipment through NAS signaling, it also includes:

The mobility management network element receives a service request sent by the user equipment, and the service request is sent when the user equipment determines that data transmission does not need to be carried through the user plane bearer;

The mobility management network element queries whether the context information of the user equipment includes an indication not to establish a default bearer;

If the context information of the user equipment includes an indication not to establish a default bearer, the mobility management network element sends an initial context establishment request to the wireless access network element to notify the wireless access network element that the The user equipment does not establish a data radio bearer and sends an RRC connection reconfiguration message to the user equipment, where the initial context establishment request includes security context information and the indication of not establishing a default bearer, and the RRC connection reconfiguration message includes no Establish data radio bearer indication.

8. The method according to claim 7, characterized in that, before the mobility management network element receives the service request sent by the user equipment, it further includes:

The mobility management network element sends a paging to the user equipment if the context information of the user equipment includes an indication not to establish a default bearer, or if the downlink data includes an indication that data transmission does not need to be carried out through the user plane bearer. information;

Wherein, the paging message includes an indication that data transmission does not need to be carried out through a user plane bearer.

9. The method according to claim 5, characterized in that when the mobility management network element does not establish a default bearer, data transmission with the user equipment through NAS signaling includes:

The mobility management network element sends a paging to the user equipment if the context information of the user equipment includes an indication not to establish a default bearer, or if the downlink data includes an indication that data transmission does not need to be carried out through the user plane bearer. message, the paging message includes an indication that data transmission does not need to be carried through the user plane bearer;

The mobility management network element receives the signaling plane data transmission request sent by the user equipment, and the signaling plane data transmission request is sent when the user equipment determines that data transmission does not need to be carried out through the user plane bearer;

The mobility management network element sends a first signaling plane data transmission acceptance message to the wireless access network element to trigger the wireless access network element to send a second signaling plane data transmission acceptance message to the user equipment. , wherein the first signaling plane data transmission acceptance message includes: security context information and downlink data, and the second signaling plane data transmission acceptance message includes: the downlink data.

10. The method according to claim 1, characterized in that when the mobility management network element does not establish a default bearer, data transmission with the user equipment through NAS signaling includes:

The mobility management network element receives a signaling plane data transmission request sent by the user equipment. The signaling plane data transmission request includes: uplink data. The signaling plane data transmission request determines that the user equipment does not need to pass Sent when the user plane bearer performs data transmission;

The mobility management network element extracts the above information from the signaling plane data transmission request. row data;

The mobility management network element sends a first signaling plane data transmission acceptance message to the wireless access network element to trigger the wireless access network element to send a second signaling plane data transmission acceptance message to the user equipment. , wherein the first signaling plane data transmission acceptance message includes: security context information.

11. The method according to claim 9 or 10, further comprising: the mobility management network element receiving a signaling plane data transmission completion message sent by the user equipment, and the signaling plane data transmission completing The message includes an indication of whether to release the signaling connection; the mobility management network element determines whether to release the signaling connection according to the indication of whether to release the signaling connection.

12. The method according to claim 5, further comprising: the mobility management network element receiving a bearer deletion request sent by the packet data gateway; the bearers to be deleted by the mobility management network element are all PDNs When the last bearer is connected, determine whether the context information of the user equipment or the subscription data of the user equipment includes an indication not to establish a default bearer;

If the mobility management network element includes an indication not to establish a default bearer, send a deactivation bearer request to the wireless access network element to request the wireless access network element to send an RRC link reconfiguration message to the user equipment, Wherein, the deactivation bearer request includes a deactivation EPS bearer context request and a non-detachment instruction, and the RRC link reconfiguration message includes a deactivation EPS bearer context request and a non-detachment instruction.

13. A data transmission method, characterized by including:

The user equipment sends an indication of whether to establish a default bearer for the user equipment to the mobility management network element to notify the mobility management network element when it determines not to establish a default bearer based on the indication of whether to establish a default bearer for the user equipment. The incoming network element sends an instruction not to establish a default bearer;

When a default bearer is not established, the user equipment performs data transmission with the mobility management network element through NAS signaling.

14. The method according to claim 13, wherein the user equipment sends an indication whether to establish a default bearer for the user equipment to the mobility management network element, including: The user equipment sends an indication of whether to establish a default bearer for the user equipment to the mobility management network element through an attach request message.

15. The method according to claim 14, characterized in that,

16. The method according to claim 13, further comprising: the user equipment sending a tracking area/routing area update request message to the new mobility management network element, the tracking area/routing area update request message including Whether to establish a default bearer indication for the user equipment, so that the new mobility management network element determines whether to establish a default bearer for the user equipment.

17. The method according to claim 13, characterized in that, when the user equipment does not establish a default bearer, before performing data transmission with the mobility management network element through NAS signaling, it further includes:

When the user equipment determines that data transmission does not need to be carried out through the user plane bearer, the user equipment sends a service request to the mobility management network element to notify the mobility management network element not to establish a data wireless connection for the user equipment. carry.

18. The method according to claim 15, characterized in that, when the user equipment determines that data transmission does not need to be carried out through a user plane bearer, before the user equipment sends a service request to the mobility management network element, it further includes: :

The user equipment receives a paging message sent by the mobility management network element. The paging message includes an indication that data transmission does not need to be carried through a user plane bearer, and the mobility management network element determines the location of the user equipment. When the context information includes an indication not to establish a default bearer, or the downlink data includes an indication that data transmission does not need to be carried out through the user plane bearer sent on time.

19. The method according to claim 13, characterized in that when the user equipment does not establish a default bearer, the user equipment performs data transmission with the mobility management network element through NAS signaling, including:

The user equipment receives a paging message sent by the mobility management network element. The paging message includes an indication that data transmission does not need to be carried through a user plane bearer, and the mobility management network element determines the location of the user equipment. Sent when the context information includes an indication not to establish a default bearer, or when the downlink data includes an indication that data transmission does not need to be carried out through the user plane bearer;

When the user equipment determines that data transmission through the user plane bearer is not required, the user equipment sends a signaling plane data transmission request to the wireless access network element to request the wireless access network element to forward the signaling. The user equipment receives a second signaling plane data transmission acceptance message sent by the wireless access network element, wherein the second signaling plane data transmission acceptance message is sent by The wireless access network element sends the first signaling plane data transmission acceptance message after receiving the mobility management network element. The first signaling plane data transmission acceptance message includes: security context information and the downlink data, the second signaling plane data transmission acceptance message includes: the downlink data.

20. The method according to claim 13, characterized in that when the user equipment does not establish a default bearer, the user equipment performs data transmission with the mobility management network element through NAS signaling, including:

When the user equipment determines that data transmission through the user plane bearer is not required, the user equipment sends a signaling plane data transmission request to the wireless access network element to request the wireless access network element to forward the signaling. The plane data transmission request is sent to the mobility management network element, and the signaling plane data transmission request includes: uplink data;

The user equipment receives a second signaling plane data transmission accept message sent by the wireless access network element, wherein the second signaling plane data transmission accept message is received by the wireless access network element from the mobility It is sent after the first signaling plane data transmission acceptance message sent by the management network element. The first signaling plane data transmission acceptance message includes: security context information interest.

21. The method according to claim 19 or 20, further comprising: the user equipment sending a signaling plane data transmission completion message to the mobility management network element, the signaling plane data transmission completion message Including whether to release the signaling connection indication.

22. A data transmission device, characterized in that it includes:

The acquisition module is used to obtain the indication of whether to establish a default bearer for the user equipment;

A sending module, configured to send a non-establishing default bearer indication to the wireless access network element if it is determined not to establish a default bearer based on the indication of whether to establish a default bearer for the user equipment; A transmission module, used to send a non-establishing default bearer indication to the wireless access network element when the default bearer is not established. NAS signaling performs data transmission with the user equipment.

23. The data transmission device according to claim 22, characterized in that the acquisition module is specifically configured to receive an indication of whether to establish a default bearer for the user equipment sent by the user equipment through an attach request message;

Or, the acquisition module is specifically configured to receive an indication of whether to establish a default bearer for the user equipment sent by the user equipment through an attachment request message and a subscription of the user equipment sent by the home user subscription server through an update location confirmation message. Information, the subscription information includes an indication of whether to establish a default bearer for the user equipment;

Or, the acquisition module is specifically configured to receive a context response message sent by the original mobility management network element. The context response message includes the context information of the user equipment. The context information of the user equipment stores a default value of not establishing Carrying instructions.

24. The data transmission device according to claim 23, wherein the indication of whether to establish a default bearer for the user equipment is indicated by the attachment type in the attachment request message;

Or, the indication of whether to establish a default bearer for the user equipment is through the attach request message. Representation of network capabilities of user equipment in .

25. The data transmission device according to any one of claims 22 to 24, characterized in that the sending module is specifically configured to send an indication not to establish a default bearer to the wireless access network element through an attachment acceptance message.

26. The data transmission device according to any one of claims 22 to 25, further comprising:

A storage module configured to save the indication of not establishing a default bearer in the context information of the user equipment.

27. The data transmission device according to claim 26, further comprising:

A receiving module, configured to receive a context request message sent by the new mobility management network element. The context request message is received by the new mobility management network element from the tracking area/routing area update request sent by the user equipment. Afterwards, the tracking area/routing area update request message includes an indication of whether to establish a default bearer for the user equipment;

The sending module is also configured to send a context response message to the new mobility management network element. The context response message includes context information of the user equipment. The context information of the user equipment stores a default value of not establishing Bearer indication, so that the new mobility management network element determines whether to establish a default bearer for the user equipment.

28. The data transmission device according to claim 26, further comprising:

A receiving module, configured to receive a service request sent by the user equipment, which is sent when the user equipment determines that data transmission does not need to be carried through the user plane; A query module, used to query the context information of the user equipment Whether to include instructions not to establish a default bearer;

The sending module is also configured to send an initial context establishment request to the wireless access network element to notify the wireless access if the query module queries that the context information of the user equipment includes an indication not to establish a default bearer. The network element does not establish a data radio bearer for the user equipment and sends an RRC connection reconfiguration message to the user equipment, wherein the initial context establishment request includes security context information and the indication of not establishing a default bearer. Indicates that the RRC connection reconfiguration message includes an indication not to establish a data radio bearer.

29. The data transmission device according to claim 28, wherein the sending module is further configured to: if the context information of the user equipment includes an indication not to establish a default bearer, or if the downlink data includes no need to When performing data transmission instructions through the user plane bearer, send a paging message to the user equipment;

30. The data transmission device according to claim 26, wherein the transmission module is specifically used when the context information of the user equipment includes an indication not to establish a default bearer, or if the downlink data includes an indication that no default bearer is required. When the data transmission instruction is performed through the user plane bearer, a paging message is sent to the user equipment, and the paging message includes an instruction that data transmission does not need to be performed through the user plane bearer;

The transmission module is specifically configured to receive a signaling plane data transmission request sent by the user equipment. The signaling plane data transmission request is sent when the user equipment determines that data transmission does not need to be carried out through the user plane bearer;

The transmission module is specifically configured to send a first signaling plane data transmission acceptance message to the wireless access network element to trigger the wireless access network element to send a second signaling plane data transmission to the user equipment. Accept message, wherein the first signaling plane data transmission acceptance message includes: security context information and downlink data, and the second signaling plane data transmission acceptance message includes: the downlink data.

3 1. The data transmission device according to claim 26, wherein the transmission module is specifically configured to receive a signaling plane data transmission request sent by the user equipment, and the signaling plane data transmission request includes: Uplink data, the signaling plane data transmission request is sent when the user equipment determines that data transmission does not need to be carried over the user plane bearer;

The device also includes:

An extraction module, configured to extract the uplink data from the signaling plane data transmission request; The transmission module, specifically, is further configured to send a first signaling plane data transmission acceptance message to the wireless access network element, to The wireless access network element is triggered to send a second signaling plane data transmission acceptance message to the user equipment, where the first signaling plane data transmission acceptance message includes: security context information.

32. The data transmission device according to claim 30 or 31, further comprising:

A receiving module, configured to receive a signaling plane data transmission completion message sent by the user equipment, where the signaling plane data transmission completion message includes an indication of whether to release the signaling connection;

A determining module, configured to determine whether to release the signaling connection according to the indication of whether to release the signaling connection.

33. The data transmission device according to claim 26, further comprising:

A receiving module, configured to receive a deletion bearer request sent by the packet data gateway; A judging module, configured to judge the context information of the user equipment or the subscription data of the user equipment when the bearer to be deleted is the last bearer of all PDN connections. Whether to include instructions not to establish a default bearer;

The sending module is also configured to send a deactivation bearer request to the wireless access network element if the indication of not establishing a default bearer is included, so as to request the wireless access network element to send an RRC link reconfiguration message to the user equipment. , wherein the deactivation bearer request includes a deactivation EPS bearer context request and a non-detachment indication, and the RRC link reconfiguration message includes a deactivation EPS bearer context request and a non-detachment indication.

34. A data transmission device, characterized in that it includes:

A sending module configured to send an indication of whether to establish a default bearer for the user equipment to the mobility management network element, so as to notify the mobility management network element when it determines not to establish a default bearer based on the indication of whether to establish a default bearer for the user equipment, Send an instruction not to establish a default bearer to the wireless access network element;

The transmission module is used to transmit data with the mobility management network element through NAS signaling when no default bearer is established.

35. The data transmission device according to claim 34, wherein the sending module is specifically configured to send an indication of whether to establish a default bearer for the user equipment to the mobility management network element through an attach request message.

36. The data transmission device according to claim 35, wherein the indication of whether to establish a default bearer for the user equipment is through the attachment type in the attachment request message. express;

37. The data transmission device according to any one of claims 34-36, characterized in that,

The sending module is also configured to send a tracking area/routing area update request message to the new mobility management network element, where the tracking area/routing area update request message includes an indication of whether to establish a default bearer for the user equipment, so that all The new mobility management network element determines whether to establish a default bearer for the user equipment.

38. The data transmission device according to any one of claims 34 to 37, characterized in that,

The sending module is also configured to send a service request to the mobility management network element to notify the mobility management network element that the user equipment is the user equipment when the user equipment determines that data transmission does not need to be carried out through the user plane bearer. No data radio bearer is established.

39. The data transmission device according to claim 38, further comprising:

A receiving module, configured to receive a paging message sent by the mobility management network element, where the paging message includes an indication that data transmission does not need to be carried through the user plane bearer, and the mobility management network element determines that the user equipment It is sent when the context information includes an indication not to establish a default bearer, or when the downlink data includes an indication that data transmission does not need to be carried out through the user plane bearer.

40. The data transmission device according to claim 34, wherein the transmission module is specifically configured to receive a paging message sent by the mobility management network element, and the paging message includes information that does not need to be carried through the user plane. Perform data transmission instructions, and the mobility management network element determines that the context information of the user equipment includes not establishing a default bearer. It is sent when the user plane bearer indicates that the data is not required to be transmitted through the user plane bearer;

The transmission module is specifically configured to send a signaling plane data transmission request to the wireless access network element to request the wireless access network element when the user equipment determines that data transmission does not need to be carried out through the user plane bearer. Forward the signaling plane data transmission request to the mobility management network element;

The transmission module is specifically configured to receive a second signaling plane data transmission acceptance message sent by the wireless access network element, wherein the second signaling plane data transmission acceptance message is received by the wireless access network element. The first signaling plane data transmission acceptance message is sent to the mobility management network element, and the first signaling plane data transmission acceptance message includes: security context information and the downlink data, the second signaling The plane data transmission acceptance message includes: the downlink data.

41. The data transmission device according to claim 34, characterized in that: the transmission module is specifically configured to send signaling plane data to the wireless access network element when it is determined that data transmission through a user plane bearer is not required. A transmission request to request the wireless access network element to forward the signaling plane data transmission request to the mobility management network element, where the signaling plane data transmission request includes: uplink data;

The transmission module is specifically configured to receive a second signaling plane data transmission acceptance message sent by the wireless access network element, wherein the second signaling plane data transmission acceptance message is received by the wireless access network element. The first signaling plane data transmission acceptance message is sent to the mobility management network element, and the first signaling plane data transmission acceptance message includes: security context information.

42. The data transmission device according to claim 40 or 41, characterized in that, the sending module is further configured to send a signaling plane data transmission completion message to the mobility management network element, and the signaling plane data The transmission completion message includes an indication of whether to release the signaling connection.

43. A data transmission device, characterized in that it includes:

Receiver, used to obtain an indication of whether to establish a default bearer for the user equipment;

Transmitter, used to determine whether to establish a default bearer for the user equipment according to the indication When a default bearer is not established, send a no-default bearer indication to the wireless access network element; the receiver is also configured to receive data sent by the user equipment through NAS signaling when a default bearer is not established;

The transmitter is also used to send data to the user equipment through NAS signaling when a default bearer is not established.

44. The data transmission device according to claim 43, wherein the receiver is specifically configured to receive an indication of whether to establish a default bearer for the user equipment sent by the user equipment through an attach request message;

Or, the receiver is specifically configured to receive an indication of whether to establish a default bearer for the user equipment sent by the user equipment through an attachment request message and a subscription of the user equipment sent by the home user subscription server through an update location confirmation message. Information, the subscription information includes an indication of whether to establish a default bearer for the user equipment;

Or, the receiver is specifically configured to receive a context response message sent by the original mobility management network element. The context response message includes context information of the user equipment. The context information of the user equipment stores a default value of not establishing Carrying instructions.

45. The data transmission device according to claim 44, wherein the indication of whether to establish a default bearer for the user equipment is represented by the attachment type in the attachment request message;

46. The data transmission device according to any one of claims 43 to 45, characterized in that the transmitter is specifically configured to send a non-establishment default bearer indication to the wireless access network element through an attachment acceptance message.

47. The data transmission device according to any one of claims 43 to 46, further comprising: A memory configured to save the indication of not establishing a default bearer in the context information of the user equipment.

48. The data transmission device according to claim 47, wherein the receiver is further configured to receive a context request message sent by a new mobility management network element, the context request message being sent by the new mobility management network element. The network element sends the tracking area/routing area update request after receiving it from the user equipment. The tracking area/routing area update request message includes an indication of whether to establish a default bearer for the user equipment;

The transmitter is also used to send a context response message to the new mobility management network element. The context response message includes context information of the user equipment. The context information of the user equipment stores a default value of not establishing Bearer indication, so that the new mobility management network element determines whether to establish a default bearer for the user equipment.

49. The data transmission device according to claim 47, wherein the receiver is further configured to receive a service request sent by the user equipment, and the service request determines that the user equipment does not need to be carried through the user plane. Sent during data transmission;

The data transmission device further includes: a processor configured to query whether the context information of the user equipment includes an indication not to establish a default bearer;

The transmitter is also configured to send an initial context establishment request to the wireless access network element to notify the wireless access if the query module queries that the context information of the user equipment includes an indication not to establish a default bearer. The network element does not establish a data radio bearer for the user equipment and sends an RRC connection reconfiguration message to the user equipment, where the initial context establishment request includes security context information and the indication of not establishing a default bearer, and the RRC connection The reconfiguration message includes an indication not to establish a data radio bearer.

50. The data transmission device according to claim 49, characterized in that, the transmitter is also used if the context information of the user equipment includes an indication not to establish a default bearer, or if the downlink data includes an indication that no default bearer is required. When performing data transmission instructions through the user plane bearer, send a paging message to the user equipment;

51. The data transmission device according to claim 47, characterized in that: The transmitter is specifically configured to send a paging message to the user equipment if the context information of the user equipment includes an indication not to establish a default bearer, or if the downlink data includes an indication that data transmission does not need to be carried out through the user plane bearer. , the paging message includes an indication that data transmission does not need to be carried out through the user plane bearer;

The receiver is specifically configured to receive a signaling plane data transmission request sent by the user equipment. The signaling plane data transmission request is sent when the user equipment determines that data transmission does not need to be carried out through the user plane bearer;

The transmitter is specifically configured to send a first signaling plane data transmission acceptance message to the wireless access network element to trigger the wireless access network element to send a second signaling plane data transmission to the user equipment. Accept message, wherein the first signaling plane data transmission acceptance message includes: security context information and downlink data, and the second signaling plane data transmission acceptance message includes: the downlink data.

52. The data transmission device according to claim 47, wherein the receiver is specifically configured to receive a signaling plane data transmission request sent by the user equipment, and the signaling plane data transmission request includes: uplink Data, the signaling plane data transmission request is sent when the user equipment determines that data transmission does not need to be carried out through the user plane bearer;

The device also includes:

The processor is configured to extract the uplink data from the signaling plane data transmission request; the transmitter is specifically further configured to send a first signaling plane data transmission acceptance message to the wireless access network element, to The wireless access network element is triggered to send a second signaling plane data transmission acceptance message to the user equipment, where the first signaling plane data transmission acceptance message includes: security context information.

53. The data transmission device according to claim 51 or 52, wherein the receiver is further configured to receive a signaling plane data transmission completion message sent by the user equipment, and the signaling plane data transmission The completion message includes an indication of whether to release the signaling connection; the processor is further configured to determine whether to release the signaling connection according to the indication of whether to release the signaling connection.

54. The data transmission device according to claim 47, wherein the receiver is further configured to receive a bearer deletion request sent by the packet data gateway; The data transmission device further includes: a processor, configured to provide all bearers to be deleted with

When the last bearer of the PDN connection is reached, determine whether the context information of the user equipment or the subscription data of the user equipment includes an indication not to establish a default bearer;

The transmitter is also configured to, if an indication of not establishing a default bearer is included, send a deactivation bearer request to the wireless access network element to request the wireless access network element to send an RRC link reconfiguration message to the user equipment. , wherein the deactivation bearer request includes a deactivation EPS bearer context request and a non-detachment indication, and the RRC link reconfiguration message includes a deactivation EPS bearer context request and a non-detachment indication.

55. A data transmission device, characterized in that it includes:

A transmitter configured to send an indication of whether to establish a default bearer for the user equipment to the mobility management network element, to notify the mobility management network element when it determines not to establish a default bearer based on the indication of whether to establish a default bearer for the user equipment, Send an instruction not to establish a default bearer to the wireless access network element;

The transmitter is configured to send data to the mobility management network element through NAS signaling when a default bearer is not established;

The receiver is configured to receive data sent by the mobility management network element through NAS signaling when a default bearer is not established.

56. The data transmission device according to claim 55, characterized in that the transmitter is specifically configured to send an indication of whether to establish a default bearer for the user equipment to the mobility management network element through an attach request message.

57. The data transmission device according to claim 56, wherein the indication of whether to establish a default bearer for the user equipment is indicated by the attachment type in the attachment request message;

58. The data transmission device according to any one of claims 55-57, characterized in that,

The transmitter is also configured to send a tracking area/routing area update request message to the new mobility management network element, where the tracking area/routing area update request message includes an indication of whether to establish a default bearer for the user equipment, so that all The new mobility management network element determines whether to establish a default bearer for the user equipment.

59. The data transmission device according to any one of claims 55-58, characterized in that,

The transmitter is also configured to send a service request to the mobility management network element when the user equipment determines that data transmission does not need to be carried out through the user plane bearer to notify the mobility management network element that the user equipment is the user equipment. No data radio bearer is established.

60. The data transmission device according to claim 59, characterized in that the receiver is further configured to receive a paging message sent by the mobility management network element, the paging message includes information that does not need to be carried through the user plane A data transmission indication is sent by the mobility management network element when it is determined that the context information of the user equipment includes an indication not to establish a default bearer, or the downlink data includes an indication that data transmission does not need to be performed through a user plane bearer.

6 1. The data transmission device according to claim 55, characterized in that the receiver is specifically configured to receive a paging message sent by the mobility management network element, and the paging message includes information that does not need to be passed through the user plane. The bearer performs data transmission indication, and is sent by the mobility management network element when it is determined that the context information of the user equipment includes an indication not to establish a default bearer, or when the downlink data includes an indication that data transmission does not need to be carried out through the user plane bearer;

The receiver is specifically configured to send a signaling plane data transmission request to the wireless access network element to request the wireless access network element when the user equipment determines that data transmission does not need to be carried out through the user plane bearer. Forward the signaling plane data transmission request to the mobility management network element;

The receiver is specifically configured to receive a second signaling plane data transmission acceptance message sent by the wireless access network element, wherein the second signaling plane data transmission acceptance message is composed of the The wireless access network element sends the first signaling plane data transmission acceptance message after receiving it from the mobility management network element. The first signaling plane data transmission acceptance message includes: security context information and the downlink data, The second signaling plane data transmission acceptance message includes: the downlink data.

62. The data transmission device according to claim 55, wherein the transmitter is specifically configured to send signaling plane data to the wireless access network element when it is determined that data transmission does not need to be carried out through a user plane bearer. A transmission request to request the wireless access network element to forward the signaling plane data transmission request to the mobility management network element, where the signaling plane data transmission request includes: uplink data;

The receiver is specifically configured to receive a second signaling plane data transmission acceptance message sent by the wireless access network element, wherein the second signaling plane data transmission acceptance message is received by the wireless access network element. The first signaling plane data transmission acceptance message is sent to the mobility management network element, and the first signaling plane data transmission acceptance message includes: security context information.

63. The data transmission device according to claim 61 or 62, characterized in that, the transmitter is also used to send a signaling plane data transmission completion message to the mobility management network element, and the signaling plane data The transmission completion message includes an indication of whether to release the signaling connection.