WO2018107368A1 - Connection establishment method and device for data transmission - Google Patents

Abstract

The present application relates to a connection establishment method and device for data transmission. When a terminal needs to send uplink data to a network side, or the network side needs to send downlink data to the terminal, the terminal sends a service request message to a mobility management network element at the network side; the mobility management network element receives the service request message sent by the terminal, wherein the service request message comprises indication information and connection establishment request information; and the mobility management network element establishes a data transmission connection between the terminal and the mobility management network element according to the service request message, so that the terminal sends the uplink data to the mobility management network element, or the mobility management network element sends the downlink data to the terminal. Thereby, what were originally two NAS processes needing to be executed are combined into one process. The signalling overhead can be reduced. Additionally, delay data transmission can be prevented, and the power consumption of a terminal can also be reduced.

Description

Method and device for establishing connection of data transmission Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and an apparatus for establishing a connection for data transmission.

Background technique

With the evolution of wireless communication technology and the gradual penetration of mobile broadband Internet into different industries, more and more traditional terminal devices need to access the mobile Internet to realize the interconnection of data transmission, and then derive the Internet of Things (IoT). . Cellular Internet of Things (CIoT) is an Internet of Things (IoT) that accesses IoT terminals to mobile communication networks through the Narrowband Internet of Things (NB-IoT) access technology.

Due to the application features of the IoT terminal, such as the function of the device, the power consumption is low, and the user data transmission is infrequent, many of the features defined in the existing Evolved Packet System (EPS) are too complicated for the CIoT application scenario. In order to simplify the process of accessing CIoT for IoT terminals, the prior art optimizes some existing network functions in EPS, but this optimization mainly lies in the air interface resources between the IoT terminal and the core network element, and the inventor finds In the prior art, during the connection establishment process of the data transmission between the terminal and the network side, the delay of the CIoT data transmission is caused, and at the same time, the signaling overhead of the terminal is large and the power consumption is high.

Summary of the invention

In the prior art, in the process of establishing a connection between the terminal and the network side in the data transmission, the delay of the CIoT data transmission is caused, and the signaling overhead of the terminal is large and the power consumption is high. A method and device for connecting data transmission connections.

In a first aspect, a connection method for data transmission is provided in the embodiment of the present application, including:

The terminal sends a service request message to the mobility management network element, where the service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, and the connection is established. The request information is used by the mobility management network element to initiate a setup request for the connection of the data transmission;

The terminal establishes a connection of the data transmission with the mobility management network element.

In a possible design, before the terminal sends a service request message to the mobility management network element, the method further includes:

The terminal acquires request information that the application on the terminal needs to send uplink data; or

The terminal receives the paging message sent by the mobility management network element, where the paging message includes indication information, where the indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to the terminal.

In a possible design, the service request message includes: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message.

In a possible design, the connection establishment request information includes:

a packet data network (PDN) connection establishment request message; or,

Packet Data Protocol PDP Context Setup Request message.

In a possible design, the indication information includes: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type.

In one possible design, the service request message includes a non-access stratum NAS message container, and the NAS message container includes the connection setup request information.

In a second aspect, the embodiment of the present application further provides a connection establishment method for data transmission, including:

The mobile management network element receives the service request message sent by the terminal, where the service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, the connection Establishing request information for the mobile management network element to initiate a setup request for the connection of the data transmission;

The mobility management network element establishes a connection for the data transmission for the terminal according to the connection establishment request information.

In a possible design, before the mobile management network element receives the service request message sent by the terminal, the method further includes:

The mobility management network element sends a paging message to the terminal, where the paging message includes indication information, where the indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to the terminal.

In a possible design, the mobility management network element sends a paging message to the terminal, including:

Receiving, by the mobile management network element, a connection establishment request for data transmission sent by the preset network element; the mobility management network element sending a paging message to the terminal according to the connection establishment request sent by the preset network element;

Or the mobile management network element receives the indication information of the downlink data transmission on the network side that is sent by the preset network element; the mobility management network element sends the paging message to the terminal according to the indication information sent by the preset network element. ;

The preset network element includes: a gateway network element or a network element having a service capability opening function.

In a possible design, the service request message includes: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message.

In a possible design, the establishing the connection of the data transmission comprises:

Establish a packet data network PDN connection; or,

Establish a packet data protocol PDP context.

In a possible design, the indication information includes: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type.

In one possible design, the service request message includes a non-access stratum NAS message container, and the NAS message container includes the connection setup request information.

In a third aspect, an embodiment of the present application further provides a terminal, including:

a transmitter, configured to send a service request message to the mobility management network element, where the service request message includes indication information and connection request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, where The connection request information is used by the mobility management network element to initiate a connection for establishing a data transmission;

And a processor, configured to establish a connection of the data transmission with the mobility management network element.

In a possible design, the terminal further includes a receiver;

The receiver is configured to acquire request information that an application on the terminal needs to send uplink data; or

The receiver is configured to receive a paging message sent by the mobility management network element.

In a possible design, the service request message includes: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message.

In a possible design, the connection establishment request information includes:

a packet data network PDN connection setup request message; or,

Packet Data Protocol PDP Context Setup Request message.

In a possible design, the indication information includes: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type.

In a possible design, the service request message includes a non-access stratum NAS message container, The NAS message container contains the connection establishment request information.

In a fourth aspect, the embodiment of the present application further provides a mobility management network element, including: a communication interface, configured to receive a service request message sent by the terminal, where the service request message includes indication information and connection establishment request information, The indication information is used to instruct the mobility management network element to establish a connection for data transmission, where the connection establishment request information is used by the mobility management network element to initiate a connection establishment request for the data transmission;

And a processor, configured to establish, by the terminal, the connection of the data transmission according to the connection establishment request information.

The mobile management network element mobile management network element is in a possible design, the communication interface is further configured to send a paging message to the terminal, the paging message includes indication information, and the indication information is used to indicate the terminal The mobility management network element has downlink data sent to the terminal.

In a possible design, the communication interface is further configured to receive a connection establishment request for data transmission sent by a preset network element, and send the connection establishment request sent by the preset network element to the terminal. Paging message

Or the communication interface is further configured to receive indication information that the network side has a downlink data transmission sent by the preset network element, and send a paging message to the terminal according to the indication information sent by the preset network element;

The preset network element includes: a gateway network element or a network element having a service capability opening function.

In a possible design, the service request message includes: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message.

In one possible design, the processor is further configured to:

Establish a packet data network PDN connection; or,

Establish a packet data protocol PDP context. The indication information includes: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type.

In one possible design, the service request message includes a non-access stratum NAS message container, and the NAS message container includes the connection setup request information.

DRAWINGS

1 is a schematic diagram of a system architecture according to an embodiment of the present application;

2 is a schematic diagram of a connection establishment method for data transmission according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a connection establishment method for data transmission according to still another embodiment of the present application; FIG.

FIG. 4 is a schematic diagram of a connection establishment method for data transmission according to still another embodiment of the present application. Figure

FIG. 5 is a schematic diagram of a connection establishment method for data transmission according to still another embodiment of the present application; FIG.

FIG. 6 is a flowchart of a method for establishing a connection for data transmission according to still another embodiment of the present application; FIG.

FIG. 7 is a flowchart of a method for establishing a connection for data transmission according to still another embodiment of the present application; FIG.

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application; FIG.

FIG. 9 is a schematic structural diagram of a mobility management network element according to an embodiment of the present application; FIG.

FIG. 10 is a schematic diagram of a terminal according to an embodiment of the present application; FIG.

FIG. 11 is a schematic diagram of a mobility management network element according to an embodiment of the present application.

detailed description

In order to optimize the existing network functions in EPS, the 3rd Generation Partnership Project (3GPP) established the research project CIoT in the Release 13 stage.

Among them, the EPS optimization of 3GPP mainly for CIoT includes the following three schemes:

(1) Control plane optimization: The control plane signaling in the EPS network is used to control the transmission of CIoT user data between the user plane and the user equipment (UE). There is no need to establish between the terminal and the network elements of the core network. The corresponding air interface carries the context to improve the data transmission rate and save air interface radio resources.

(2) User plane optimization: mainly introduces the Radio Resource Control (RRC) connection suspension process and the recovery process, and supports the idle state terminal to save all air interface contexts and bearer resources, thereby realizing the connection state terminal air interface context and bearer. Rapid recovery of resources and increase data transfer rate.

(3) The initial attachment does not establish a default PDN connection: the IoT terminal may not establish a default PDN connection when initially attaching, that is, the IoT terminal may remain in the registered state without establishing any PDN connection. Thereby realizing the rapid registration of the Internet of Things terminals and optimizing the utilization of network resources.

It can be seen that the optimization of the control plane and the optimization of the user plane are mainly to optimize the air interface resources between the terminal and the core network element, and for the CIoT user data transmission, including the Internet Protocol (IP) data packet. With non-IP data packets, it is still necessary to establish an EPS bearer context in the EPS network on the terminal and the core network element, that is, a PDN connection (a PDN connection includes one The default EPS bearer context, or one PDN connection includes one or more dedicated EPS bearer contexts, to enable transmission of CIoT user data. Similarly, similar to the EPS network, the establishment of the PDN connection and the EPS bearer context must be initiated when the terminal is in the connected state, that is, for the terminal in the idle state, if the EPS bearer context is to be established to implement the transmission of CIoT data, it must first Initiating an initial Non-Access Stratum (NAS) signaling flow causes the terminal to change from an idle state to a connected state.

For a terminal and a core network element that does not establish a default PDN connection optimization for initial attachment, the terminal may remain in a registered state without establishing any PDN connection, but for such an idle state terminal:

(1) Before transmitting any uplink CIoT data, the terminal must first initiate the initial NAS signaling flow from the idle state to the connected state, and then initiate a PDN connection establishment procedure to establish an EPS bearer context to implement uplink CIoT data transmission;

(2) Before transmitting any downlink CIoT data, the network side needs to first trigger a request for PDN connection establishment to the mobility management network element, and then the mobility management network element initiates paging to the terminal, and the terminal initiates an initial NAS signaling procedure for paging response. And from the idle state to the connected state, and finally initiate the PDN connection establishment process to establish an EPS bearer context to implement downlink CIoT data transmission.

In this way, before the uplink or downlink CioT data transmission, two NAS processes need to be performed, that is, an initial NAS signaling process and a PDN connection establishment process, on the one hand, more signaling overhead is generated, and on the other hand, delay is also caused. The transmission of CIoT data also consumes more terminal power.

In order to solve the above problem, before the data transmission between the terminal and the network side, the embodiment of the present application provides a connection establishment method and device for data transmission.

The terminal involved in the embodiment of the present application may be an Internet of Things terminal that accesses the mobile communication network through the NB-IoT access technology, or an Internet of Things terminal that accesses the mobile communication network through other Internet of Things access technologies. These IoT terminals have application features such as simple functions, low power consumption, and infrequent user data transmission, and typically can be smart meters with wireless communication functions, smart home appliances, handheld devices, in-vehicle devices, wearable devices, computing devices, or Other processing devices connected to the wireless modem, and so on.

The mobility management network element involved in the embodiment of the present application may be a Serving GPRS Support Node (SGSN) in a 2G or 3G network, and a Mobility Management Entity (MME) in a 4G network. ), Cellular IoT Serving Gateway Node (C-SGN), control plane function network element in 5G network, and so on. The gateway network element involved in the embodiment of the present application may be a gateway general packet radio in a 2G or 3G network. Service Provider Support Node (GGSN), PDN Gateway PDN GW, Service Gateway S-GW, Service Capability Exposure Function (SCEF) network element in 4G network, User plane function network in 5G network Yuan and so on.

It should be noted that, in the 4G network, when data is transmitted between the terminal and the mobility management network element, a PDN connection needs to be established between the terminal and the mobility management network element, and a PDN connection may be a default EPS bearer context. The PDP context may be established between the terminal and the mobility management network element, where the data is transmitted between the terminal and the mobility management network element in the 2G or 3G network. For example, the data transmission connection is established in the 4G network by using the mobile management network element in the terminal and the network side as an example. However, the embodiment of the present application is not limited thereto.

In this embodiment of the present application, the terminal is in a registration state and the terminal does not have a connection context for data transmission.

When the terminal acquires the request message sent by the application that needs to send the uplink user data to the network side, or when the terminal receives the paging request message sent by the mobility management network element in the network side, the terminal sends a service request message (Service Request to the mobility management network element, wherein the service request message includes indication information and connection establishment request information, the indication information is used to instruct the mobility management network element to establish a connection context for data transmission, the connection establishment request information is used for mobile The management network element initiates a setup request for a connection for data transmission. Exemplarily, the connection establishment request information may be a NAS message container. In an embodiment, the connection establishment request information may be an NAS message container as an example.

The service request message may be: an extended service request (Extended Service Request) message, a data service request (Data Service Request) message, a Control Plane Service Request message, or a signaling plane service request (Signalling Plane Service). The request information may be: an empty bearer identifier, an empty connection context identifier, a connection establishment service type (service type), or a session management (Session Management) message service type.

When receiving the service request message sent by the terminal, the mobility management network element on the network side obtains the connection establishment request information in the service request message, and establishes a data transmission connection for the terminal according to the connection establishment request information, that is, establishes a packet data network PDN connection. . The mobile management network element receives the service request message sent by the terminal, which is equivalent to encapsulating the PDN connection establishment process between the terminal and the mobility management network element in the NAS signaling process, and the two NAS processes that are required to be executed in the prior art. (ie, an initial NAS signaling process and a PDN connection establishment process) are combined into one process. Compared with the prior art, the signaling overhead can be reduced on the one hand, and the delayed data transmission can be avoided on the other hand. To reduce the consumption of terminal power.

In addition, "system" and "network" are used interchangeably in this application. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

In an embodiment provided by the present application, as shown in FIG. 1 , FIG. 1 is a schematic diagram of a scenario application according to an embodiment of the present application; FIG. 1 includes: a terminal 100, a mobility management network element 200, and a serving gateway (Serving GateWay, S-GW) 300 and packet data network gateway PDN GW 400. FIG. 1 is an example in which the mobility management network element is an MME.

For the uplink data transmission, when the terminal 100 acquires the request message sent by the application that needs to send the uplink user data, the terminal 100 sends a service request message to the MME 200. Specifically, the terminal sends a service request message encapsulating the PDN connection setup request message to the MME 200. For the downlink data transmission, the PDN GW 400 sends a PDN connection establishment request to the MME 200, and the MME 200 initiates a paging request to the terminal 100. After the terminal receives the paging request message sent by the MME 200, the terminal 100 sends a PDN connection establishment request. The service request message of the message is sent to the MME 200. The MME 200 establishes a data transmission connection for the terminal 100 according to the service request message sent by the terminal 100.

With reference to the embodiments, in another embodiment provided by the present application, a connection establishment method for data transmission is provided, and the method is applied to a terminal. As shown in FIG. 2, the terminal is in a registration state and the terminal is not established for data transmission. The connection context, the method can include the following steps:

In step S210, the terminal acquires a data transmission request message or receives a paging message.

The data sending request message may be an uplink data sending request message sent by the application on the terminal; the paging message is a paging message sent by the mobility management network element, where the paging message carries indication information, where the indication information is used for moving When the downlink data needs to be sent to the terminal in the management network element, the terminal is instructed to initiate connection establishment for data transmission to the mobility management network element.

In combination with the foregoing embodiment, for downlink data transmission, the PDN GW triggers a PDN connection establishment request to the mobility management network element, and the mobility management network element initiates a paging request to the terminal, and the terminal receives the paging sent by the mobility management network element in the network side. When requesting the message, the terminal sends a service request message to the mobility management network element, so that the mobility management network element establishes a data transmission connection for the terminal according to the service request message sent by the terminal.

In step S220, the terminal sends a service request message to the mobility management network element.

In step S230, the terminal establishes a connection for data transmission with the mobility management network element.

The service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, and the connection establishment request information is used by the mobility management network element to initiate establishment of a connection for data transmission. request.

In addition, the service request message may be: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message. The indication information may be: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type. The mobility management network element may be: a mobility management entity MME, a serving general packet radio service support node SGSN, or a cellular IoT service gateway network element C-SGN.

The connection establishment request information may be specifically a NAS message container, where the NAS message container includes a connection request message initiated by the terminal for data transmission, and the connection request message may specifically be: a packet data network PDN connection request message; or a packet data protocol PDP context. Create a request message. In the 4G network, the connection request message is a PDN connection setup request message; in a 2G or 3G network, the connection request message is a PDP context setup request message.

As the implementation process has been described in detail in the above embodiments, reference may be made to the foregoing embodiments, and details are not described herein again.

In conjunction with the foregoing embodiments, in another embodiment provided by the present application, a method for establishing a connection for data transmission is provided. The method is applied to a mobility management network element. As shown in FIG. 3, the method may include the following steps:

In step S310, the mobility management network element receives the service request message sent by the terminal.

The service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, and the connection establishment request information is used by the mobility management network element to initiate establishment of a connection for data transmission. request;

The service request message may be: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message. The connection establishment request information may be specifically a NAS message container, where the NAS message container includes a connection establishment request message initiated by the terminal for data transmission. The connection establishment request message may be specifically: a packet data network PDN connection establishment request message; or a packet data protocol PDP context establishment request message. In the 4G network, the connection establishment request message is a PDN connection establishment request message; in the 2G or 3G network, the connection establishment request message is a PDP context establishment request message.

In step S320, the mobility management network element establishes a connection for data transmission for the terminal according to the connection establishment request information carried in the service request message.

When the mobile management network element receives the service request message, the mobility management network element extracts the indication information in the service request message, and obtains the connection establishment request message in the NAS message container according to the indication information. The indication information may be specifically: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type.

The mobility management network element may be: MME, SGSN, or C-SGN.

The mobility management network element establishes a data transmission connection with the terminal according to the connection establishment request message, and establishes a packet data network PDN connection in the 4G network, and establishes a packet data protocol PDP context (PDP context) in the 2G or 3G network. The mobile management network element receives the service request message sent by the terminal, which is equivalent to encapsulating the PDN connection establishment process between the terminal and the mobility management network element in the NAS signaling process, and the two NASs that are originally required to be executed in the prior art. The process (ie, an initial NAS signaling process and a PDN connection establishment process) is combined into a process, which can reduce the signaling overhead on the one hand and delay the transmission of data on the other hand. It can reduce the consumption of the terminal power.

As a refinement of the method of FIG. 3, in another embodiment provided by the present application, as shown in FIG. 4, before step S310, the method may further include the following steps:

In step S330, the mobility management network element sends a paging message to the terminal.

The paging message carries the indication information, where the indication information is used to initiate the connection establishment for the data transmission to the mobility management network element when the downlink data is sent in the mobility management network element.

For downlink data transmission, the PDN GW triggers a PDN connection establishment request to the mobility management network element, and the mobility management network element sends a paging message to the terminal.

As a refinement of the method of FIG. 4, in another embodiment provided by the present application, as shown in FIG. 5, before step S330, the method may further include the following steps:

In step S301, the mobility management network element receives a connection establishment request for data transmission sent by the preset network element; or

In step S302, the mobility management network element receives the indication information that the network side sent by the preset network element has downlink data transmission.

The preset network element here may be: a gateway network element or a network element having a service capability opening function.

The present invention relates to a connection establishment method for data transmission. When the terminal needs to send uplink data to the network side, or the network side needs to send downlink data to the terminal, the terminal sends a service request message to the mobility management network element in the network side. The mobile management network element receives the service request message sent by the terminal, and the service The service request message includes indication information and connection establishment request information, and the mobility management network element establishes a data transmission connection between the terminal and the mobility management network element according to the service request message, so that the terminal sends uplink data to the mobility management network element, or the mobile management network The element sends downlink data to the terminal. In this way, the two NAS processes that need to be executed (ie, an initial NAS signaling process and a PDN connection establishment process) are combined into one process, which can reduce the signaling overhead on the one hand, and avoid the delayed data transmission on the other hand. At the same time, it can also reduce the consumption of the terminal power.

In order to separately describe the execution flow of the terminal side and the mobility management network element side, in another embodiment provided by the present application, when the uplink data transmission needs to be performed, that is, the terminal needs to send data to the mobility management network element on the network side. As shown in FIG. 6, the embodiment of the present application provides a connection establishment method for data transmission, in which both the terminal and the mobility management network element support initial attachment, and the default PDN connection optimization is not established, and the terminal has successfully registered to the mobility management. The network element, but the terminal does not establish any PDN connection with the mobility management network element, and the terminal is in an idle state, the embodiment may include the following steps:

In step 2001, the terminal acquires a request message sent by the application.

When the application in the terminal needs to send uplink data to the network side, the application sends a request message to the terminal.

In step 2002, the terminal sends a Service Request message to the mobility management network element, where the service request message is used to change the terminal from the idle state to the connected state. The service request message includes indication information and connection establishment request information. The indication information is used to instruct the mobility management network element to establish a connection context for data transmission.

Specifically, when the terminal is in an idle state, if it is required to send data to the network side, or the terminal needs to receive data sent by the network side, the terminal sends a service request message to the mobility management network element, and the service request message includes indication information and Connection establishment request information.

Since the terminal is in an idle state at this time, when data needs to be transmitted between the terminal and the network side, the terminal needs to be changed from the idle state to the active state (that is, the connected state), and the connection context for data transmission needs to be established. Therefore, the indication information may be an EPS bearer identity or a context identity, and is used to indicate to the mobility management network element that the terminal is currently in an idle state, and the terminal does not currently have an active EPS. The bearer context needs to instruct the mobility management network element to establish a connection context for data transmission to implement data transmission between the terminal and the network side.

In addition, the indication information may be a service type of a session between the terminal and the network side, and is used to instruct the mobility management network element to initiate a process of establishing a connection context for data transmission. Connection in the service request message The connection establishment request information may be a NAS message container. The NAS message container includes an entire PDN Connectivity Request (PDN Connectivity Request) message initiated by the terminal, and the PDN connection establishment request message triggers the mobility management network element to initiate a complete PDN connection establishment procedure. It should be noted that, when the terminal is in an idle state, the terminal may also use the service request message to send uplink data, and the NAS message container further includes user data.

In step 2003, in conjunction with the foregoing embodiment, after receiving the service request message sent by the terminal, the mobility management network element obtains the indication information from the service request message, where the indication information is used to instruct the mobility management network element to initiate establishment for the data. The connection context of the transfer. The mobility management network element obtains a PDN Connectivity Request message (PDN Connectivity Request) from the NAS message container according to the indication information.

In step 2004, the mobility management network element initiates a complete PDN connection establishment process to the serving gateway S-GW/PDN GW, thereby completing the PDN connection establishment process between the terminal, the mobility management network element, and the S-GW/PDN GW. Thereby establishing an EPS bearer context. After the PDN connection is successfully established, the terminal sends the uplink user data to the mobility management network element, and then the mobility management network element forwards it to the S-GW/PDN GW.

In order to separately describe the execution flow of the terminal side and the mobility management network element side, in another embodiment provided by the present application, when downlink data transmission is required, that is, when the network side needs to send data to the terminal, as shown in FIG. 7 As shown in the embodiment of the present disclosure, a method for establishing a connection for data transmission is provided. The terminal and the mobility management network element both support the initial attachment without establishing a default PDN connection optimization, and the terminal has successfully registered to the mobility management network element, but the terminal The mobile management network element does not establish any PDN connection, and the terminal is in an idle state. This embodiment may include the following steps:

In step 3001, in conjunction with the above embodiment and FIG. 1, the serving gateway S-GW or the PDN GW obtains a request that the application server needs to send downlink user data to the terminal.

In step 3002, since the serving gateway S-GW or the PDN GW detects that the terminal does not establish any active state EPS bearer context, it sends a PDN connection establishment request to the mobile management network element currently registered by the terminal; or, the S-GW or The PDN GW sends indication information of downlink data transmission on the network side to the mobility management network element. The mobile management network element sends a paging message to the terminal according to the connection establishment request sent by the S-GW or the PDN GW; or the mobility management network element sends the indication information of the downlink data transmission sent by the network side according to the S-GW or the PDN GW to the terminal. Paging message. The indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to the terminal.

In step 3003, after receiving the PDN connection establishment request sent by the serving gateway or the PDN GW or the indication information of the downlink data transmission on the network side, the mobility management network element initiates paging for the idle state terminal. And carrying the indication information in the paging message to indicate that the terminal has the downlink data sent by the mobility management network element to the terminal.

In step 3004, the terminal sends a service request message to the mobility management network element, and the service request changes the terminal from the idle state to the connected state, thereby satisfying the condition initiated by the PDN connection establishment process, where the service request message is found in step 3003. For the response message of the call message, the step may be specifically referred to step 2002 of the embodiment shown in FIG. 6, and details are not described herein again.

In step 3005, in conjunction with the foregoing embodiment, after receiving the service request message sent by the terminal, the mobility management network element obtains the indication information and the connection establishment request information from the service request message, where the indication information is used to indicate the mobility management network element. Initiate the establishment of a connection context for data transfer. The mobility management network element obtains a PDN connection establishment request message from the NAS message container according to the indication information.

In step 3006, the mobility management network element initiates a complete PDN connection establishment procedure to the serving gateway S-GW/PDN GW, thereby completing the PDN connection establishment process between the terminal, the mobility management network element, and the S-GW/PDN GW. Thereby establishing an EPS bearer context. After the PDN connection is successfully established, the terminal sends the uplink user data to the mobility management network element, and then the mobility management network element forwards it to the S-GW/PDN GW.

It can be seen from the foregoing embodiment that the embodiment of the present application integrates two serially executed NAS signaling processes into one NAS signaling process, and optimizes an idle state terminal EPS bearer that supports initial attachment without establishing default PDN connection optimization. The context establishment process only needs to initiate a NAS signaling process to initiate uplink and downlink data transmission, thereby saving signaling overhead and terminal power consumption and improving data transmission efficiency.

Through the description of the above method embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, server, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes various types of media that can store program codes, such as a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

In addition, as an implementation of the foregoing embodiments, the embodiment of the present application further provides a connection establishing apparatus, where the apparatus includes a terminal and a mobility management network element. First, the embodiment of the present application provides a terminal. As shown in FIG. 8, the terminal includes: a transmitter 10, a processor 20, a receiver 30, and a memory 40. among them,

The sender 10 is configured to send a service request message to the mobility management network element, where the service request message includes indication information and connection request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, The service request message includes the connection request information, where the connection request information is used by the mobility management network element to initiate a connection for establishing a data transmission;

The processor 20 is configured to establish a connection of the data transmission with the mobility management network element.

The service request message may be: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message. The indication information may be: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type. The mobility management network element may be:

The mobility management entity MME, the serving general packet radio service support node SGSN or the cellular IoT service gateway network element C-SGN.

The receiver 30 is configured to acquire request information that the application on the terminal needs to send uplink data, or the receiver 30 is configured to receive a paging message sent by the mobility management network element.

The connection establishment request information may be:

a packet data network PDN connection setup request message; or,

Packet Data Protocol PDP Context Setup Request message.

Additionally, the service request message includes a non-access stratum NAS message container, and the NAS message container includes the connection establishment request information.

The memory 40 is configured to store instructions executed in the processor.

As an implementation of the foregoing embodiments, the embodiment of the present application further provides a mobility management network element. As shown in FIG. 9, the mobility management network element 210 includes: at least one processor 211, at least one bus 212, and at least one a communication interface 213 and at least one memory 214, wherein

The memory 214 is for storing computer execution instructions; the memory 214 can include read only memory and random access memory, and provides instructions and data to the processor 211. A portion of the memory 214 may further include a non-Volatile Random Access Memory (NVRAM);

The processor 211 is connected to the communication interface 213 and the memory 214 via a bus 212, where

The communication interface 213 is configured to receive a service request message sent by the terminal, where the service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission. The connection establishment request information is used by the mobility management network element to initiate a request for establishing a connection of the data transmission;

The processor 211 is configured to establish, by the terminal, the connection of the data transmission according to the connection establishment request information.

The communication interface 213 is further configured to send a paging message to the terminal, where the paging message is used to notify the terminal that the mobility management network element has downlink data sent to the terminal.

The communication interface 213 is further configured to receive a connection establishment request for data transmission sent by a preset network element, and send a paging message to the terminal according to the connection establishment request sent by the preset network element;

Or the communication interface 213 is further configured to receive indication information that the network side has a downlink data transmission sent by the preset network element, and send a paging message to the terminal according to the indication information sent by the preset network element;

The preset network element may be: a gateway network element or a network element with a service capability open function.

The service request message may be: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message. The connection establishment request information may be: establishing a packet data network PDN connection; or establishing a packet data protocol PDP context.

The indication information may be: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type. The service request message includes a non-access stratum NAS message container, and the NAS message container includes the connection establishment request information.

In a further embodiment provided by the present application, as shown in FIG. 10, a terminal is further provided, including: a sending unit 11, a processing unit 12, and a receiving unit 13, wherein

The sending unit 11 is configured to send a service request message to the mobility management network element, where the service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission. The connection establishment request information is used by the mobility management network element to initiate a setup request for the connection of the data transmission.

The processing unit 12 is configured to establish a connection of the data transmission with the mobility management network element.

The receiving unit 13 is configured to acquire request information that the application on the terminal needs to send uplink data, or receive a paging message sent by the mobility management network element.

The paging message includes indication information, where the indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to the terminal. The service request message may be: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message.

The connection establishment request information may be: a packet data network PDN connection establishment request message; or a packet data protocol PDP context establishment request message.

The indication information may be: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type.

The service request message includes a non-access stratum NAS message container, and the NAS message container includes the connection establishment request information.

In another embodiment provided by the present application, as shown in FIG. 11, a mobility management network element is further provided, including: a receiving unit 21, a processing unit 22, and a sending unit 23, where

The receiving unit 21 is configured to receive a service request message sent by the terminal.

The service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, and the connection establishment request information is used in the mobility management network. The element initiates a setup request for the connection for the data transfer.

The processing unit 22 is configured to establish, according to the connection establishment request information, a connection for the data transmission for the terminal.

The sending unit 23 is configured to send a paging message to the terminal.

The paging message includes indication information, where the indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to the terminal.

In addition, the receiving unit 21 is further configured to receive a connection establishment request for data transmission sent by the preset network element.

The sending unit 23 is further configured to send a paging message to the terminal according to the connection establishment request sent by the preset network element.

Alternatively, the receiving unit 21 is further configured to receive indication information that the network side that is sent by the preset network element has downlink data transmission.

The sending unit 23 is further configured to send a paging message to the terminal according to the indication information sent by the preset network element.

The preset network element may be: a gateway network element or a network element having a service capability opening function.

The service request message may be: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request message.

The establishing the connection of the data transmission may be: establishing a packet data network PDN connection; or establishing a packet data protocol PDP context.

The indication information may be: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type.

The service request message includes a non-access stratum NAS message container, and the NAS message container includes a The connection establishment request information is described.

The transmitting unit 11 in FIG. 10 may be the transmitter 10 in FIG. 8, and the receiving unit 13 may be the receiver 30. The receiving unit 21 and the transmitting unit 23 in FIG. 11 can implement the function of transmitting and receiving data through the communication interface in FIG.

In the connection establishment device for data transmission provided in the embodiment of the present application, when the terminal needs to send uplink data to the network side, or the network side needs to send downlink data to the terminal, the terminal sends a service request message to the mobility management network element in the network side. The mobile management network element receives the service request message sent by the terminal, where the service request message includes indication information and connection establishment request information, and the mobility management network element establishes a data transmission connection between the terminal and the mobility management network element according to the service request message, The terminal sends the uplink data to the mobility management network element, or the mobility management network element sends the downlink data to the terminal. In this way, the two NAS processes that need to be executed (ie, an initial NAS signaling process and a PDN connection establishment process) are combined into one process, which can reduce the signaling overhead on the one hand, and avoid the delayed data transmission on the other hand. At the same time, it can also reduce the consumption of the terminal power.

In addition, in conjunction with the foregoing embodiments, in other embodiments provided by the present application, a connection establishment system for data transmission is further provided, and the system may include the terminal and the mobility management network element in the foregoing embodiment.

It will be appreciated that the present application is applicable to a wide variety of general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor based systems, set-top boxes, programmable consumer electronics devices, network PCs, small computers, mainframe computers, including A distributed computing environment of any of the above systems or devices, and the like.

The application can be described in the general context of computer-executable instructions executed by a computer, such as a program module. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types. The present application can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are connected through a communication network. In a distributed computing environment, program modules can be located in both local and remote computer storage media including storage devices.

It should be noted that, in this context, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is any such actual relationship or order between entities or operations. Furthermore, the terms "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprises" or "includes" or "includes" Other elements, Or it also includes elements inherent to such a process, method, article or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

Other embodiments of the present application will be readily apparent to those skilled in the <RTIgt; The application is intended to cover any variations, uses, or adaptations of the application, which are in accordance with the general principles of the application and include common general knowledge or common technical means in the art that are not disclosed herein. . The specification and examples are to be regarded as illustrative only,

It is to be understood that the invention is not limited to the details of the details and The scope of the present application is limited only by the accompanying claims.

Claims (26)

A method for establishing a connection for data transmission, comprising: The terminal sends a service request message to the mobility management network element, where the service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, and the connection is established. The request information is used by the mobility management network element to initiate a setup request for the connection of the data transmission; The terminal establishes a connection of the data transmission with the mobility management network element. The method according to claim 1, wherein before the terminal sends a service request message to the mobility management network element, the method further includes: The terminal acquires request information that the application on the terminal needs to send uplink data; or The terminal receives the paging message sent by the mobility management network element, where the paging message includes indication information, where the indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to the terminal. The method according to claim 1 or 2, wherein the service request message comprises: an extended service request message, a data service request message, a control plane service request message or a signaling plane service request message. The method according to claim 1 or 3, wherein the connection establishment request information comprises: a packet data network PDN connection setup request message; or, Packet Data Protocol PDP Context Setup Request message. The method according to any one of claims 1 to 4, wherein the indication information comprises: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type. The method according to any one of claims 1 to 4, wherein the service request message comprises a non-access stratum NAS message container, and the NAS message container includes the connection establishment request information. A method for establishing a connection for data transmission, comprising: The mobile management network element receives the service request message sent by the terminal, where the service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, the connection Establishing request information for the mobile management network element to initiate a setup request for the connection of the data transmission; The mobility management network element establishes a connection for the data transmission for the terminal according to the connection establishment request information. The method according to claim 7, wherein before the mobile management network element receives the service request message sent by the terminal, the method further includes: The mobility management network element sends a paging message to the terminal, where the paging message includes indication information, where the indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to the terminal. The method according to claim 8, wherein the mobile management network element sends a paging message to the terminal, including: Receiving, by the mobile management network element, a connection establishment request for data transmission sent by the preset network element; the mobility management network element sending a paging message to the terminal according to the connection establishment request sent by the preset network element; Or the mobile management network element receives the indication information of the downlink data transmission on the network side that is sent by the preset network element; the mobility management network element sends the paging message to the terminal according to the indication information sent by the preset network element. ; The preset network element includes: a gateway network element or a network element having a service capability opening function. The method according to any one of claims 7 to 9, wherein the service request message comprises: an extended service request message, a data service request message, a control plane service request message or a signaling plane service request message. The method according to any one of claims 7 to 10, wherein the establishing the connection of the data transmission comprises: Establish a packet data network PDN connection; or, Establish a packet data protocol PDP context. The method according to any one of claims 7 to 11, wherein the indication information comprises: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type. The method according to any one of claims 7 to 11, wherein the service request message comprises a non-access stratum NAS message container, and the NAS message container includes the connection establishment request information. A terminal, comprising: a transmitter, configured to send a service request message to the mobility management network element, where the service request message includes indication information and connection request information, where the indication information is used to indicate that the mobility management network element is established a connection for data transmission, the connection request information being used by the mobility management network element to initiate a connection for establishing a data transmission; And a processor, configured to establish a connection of the data transmission with the mobility management network element. The terminal according to claim 14, wherein the terminal further comprises a receiver; The receiver is configured to acquire request information that an application on the terminal needs to send uplink data; or The receiver is configured to receive a paging message sent by the mobility management network element, where the paging message includes indication information, where the indication information is used to indicate that the mobile management network element of the terminal has downlink data sent to The terminal. The terminal according to claim 14 or 15, wherein the service request message comprises: an extended service request message, a data service request message, a control plane service request message or a signaling plane service request message. The terminal according to claim 14 or 16, wherein the connection establishment request information comprises: a packet data network PDN connection setup request message; or, Packet Data Protocol PDP Context Setup Request message. The terminal according to any one of claims 14 to 17, wherein the indication information comprises: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type. The terminal according to any one of claims 14 to 17, wherein the service request message comprises a non-access stratum NAS message container, and the NAS message container includes the connection establishment request information. A mobility management network element, comprising: a communication interface, configured to receive a service request message sent by the terminal, where the service request message includes indication information and connection establishment request information, where the indication information is used to instruct the mobility management network element to establish a connection for data transmission, The connection establishment request information is used by the mobility management network element to initiate a connection request for the connection of the data transmission; And a processor, configured to establish, by the terminal, the connection of the data transmission according to the connection establishment request information. The mobility management network element according to claim 20, wherein the communication interface is further configured to send a paging message to the terminal, where the paging message includes indication information, where the indication information is used to indicate The mobile management network element of the terminal has downlink data sent to the terminal. The mobility management network element according to claim 21, wherein the communication interface is further configured to receive a connection establishment request for data transmission sent by a preset network element, and send the message according to the preset network element. The connection establishment request sends a paging message to the terminal; Or the communication interface is further configured to receive indication information that the network side has a downlink data transmission sent by the preset network element, and send a paging message to the terminal according to the indication information sent by the preset network element; The preset network element includes: a gateway network element or a network element having a service capability opening function. The mobility management network element according to any one of claims 20 to 22, wherein the service request message comprises: an extended service request message, a data service request message, a control plane service request message, or a signaling plane service request. Message. The mobility management network element according to any one of claims 20 to 23, wherein the connection establishment request information comprises: Establish a packet data network PDN connection; or, Establish a packet data protocol PDP context. The mobility management network element according to any one of claims 20 to 24, wherein the indication information comprises: an empty bearer identifier, an empty connection context identifier, a connection establishment service type, or a session management message service type. The mobility management network element according to any one of claims 20 to 24, wherein the service request message comprises a non-access stratum NAS message container, and the NAS message container includes the connection establishment request information.

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