WO2015131815A1

WO2015131815A1 - Method and device for ensuring ip continuity

Info

Publication number: WO2015131815A1
Application number: PCT/CN2015/073603
Authority: WO
Inventors: 侯云静; 艾明
Original assignee: 电信科学技术研究院
Priority date: 2014-03-07
Filing date: 2015-03-04
Publication date: 2015-09-11
Also published as: CN104902521A; CN104902521B

Abstract

A method and device for ensuring IP continuity are disclosed for resolving the problem that IP streams transmitted through PDN connection established before the reconstruction would be interrupted entirely when the terminal performs SIPTO under the existing mechanism, and the IP continuity cannot be ensured. The method includes: a terminal determines that a network side device does not need to initiate the PDN connection carrying a de-activate process with a re-activate request when performing the SIPTO function; the terminal notifies the network side device of the determined PDN connection, so that when the network side device performs SIPTO, towards the PDN connection which is correlated with the APN and does not need initiate the de-active process carrying the re-activate request when performing the SIPTO function, the network side device does not initiate the de-active process carrying the re-activate request, so that the transmission of a long lifetime IP stream/real-time IP stream is ensured, and the user experience is improved.

Description

Method and device for guaranteeing IP continuity

This application claims priority to Chinese Patent Application No. 201410083885.6, entitled "A Method and Apparatus for Assuring IP Continuity", filed on March 7, 2014, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and device for ensuring continuity of an Internet Protocol (IP).

Background technique

The selective IP traffic offload (SIPTO) function means that the operator offloads a specific type of traffic to a geographical location or a topological location from a user equipment (UE). Near network node. According to whether the user plane traffic of the UE needs to be transmitted through the core network of the operator, SIPTO is divided into SIPTO above RAN (SIPTO (Radio Access Network, RAN) above the radio access network) and SIPTO at the Local Network (SIPTO of the local network) ).

1, SIPTO above RAN;

SIPTO above RAN refers to a set of gateways (Serving Gateway (S-GW) and Packet Data Network Gateway (PDN Gateway, P-GW; Packet Data Network) that selects the attachment point of the UE in geographical or topological position. PDN)). Therefore, in SIPTO above RAN, the user plane traffic of the UE needs to be offloaded through the P-GW located in the core network of the mobile operator.

The traffic offload is only connected to the UMTS Terrestrial Radio Access Network (UMTS) and the Evolved-UTRAN (E-UTRAN) of the Evolved Universal Mobile Telecommunications System (UMT). Valid. When the UE enters UTRAN/E-UTRAN from other types of access networks, the new service general packet radio service support node (SGSN; General Packet Radio Service, GPRS) / mobility management entity MME (Mobility) Management Entity), based on the SIPTO permission of the Access Point Name (APN) (this information is configured in the SGSN/MME), determines whether a specific PDN connection needs to be deactivated and then reactivated.

The target MME/SGSN finds that the location of the UE changes due to the UE mobility (for example, the MME is found during the Tracking Area Update (TAU) process, or the SGSN is updated in the Routing Area Update (Routing Area Update, RAU) Process Discovery), or UE from the Global System for Mobile Communications/GSM Evolution Enhanced Data Service Radio Access Network (GSM/EDGE Radio Access Network, GERAN; Global System for Mobile communication, GSM; Enhanced Data Rates for GSM Evolution, EDGE Entering UTRAN/E-UTRAN, since the UE establishes a PDN connection related to the APN with SIPTO grant, the target MME/SGSN decides to redirect the part of the PDN connection to the PDN GW closer to the UE according to the location of the UE, so as to implement Optimization of the data routing path. The target MME/SGSN deactivates the above PDN connection and instructs the UE to reactivate the PDN connection during deactivation (ie, the MME/SGSN initiates a deactivation procedure carrying the reactivation request). After the UE performs the deactivation process of the PDN connection, the UE initiates an activation process of the PDN connection according to the foregoing indication, in which the target MME/SGSN selects a PDN GW that is closer to the attachment point of the UE for the PDN connection.

2, SIPTO at the Local Network;

The SIPTO at the Local Network function supports the UE to directly connect to an IP network (for example, the Internet) through the (H)eNB, and the user plane of the UE does not need to traverse the network of the mobile operator. The subscription data in the Home Subscriber Server (HSS) is based on each user per APN indicating to the MME whether to allow traffic to be offloaded on the local network.

The SIPTO at the Local Network is implemented by selecting a local gateway (Local-Gateway, L-GW) that is associated with the (H)eNB or selecting a separate gateway located in the local network (where the S-GW and the L-GW are located). In the same network entity). The IP traffic selected in both scenarios is offloaded through the local network.

Currently, there is no interface between the L-GW and the Policy Control and Charging Rules Function (PCRF), so the PDN connection that can use the SIPTO at the Local Network does not support the dedicated bearer. The L-GW shall reject any bearer resource modification request sent by the UE.

If the MME finds that the SIPTO grant in the subscription data of a particular APN of a particular subscriber is changed, and the subscriber has established a SIPTO at the Local Network PDN connection associated with the particular APN, the MME shall release the SIPTO at associated with the APN. The Local Network PDN is connected and carries a reactivation request in the PDN disconnect request message.

In summary, when SIPTO is currently executed, the established PDN connection related to the APN with SIPTO permission needs to be activated first, and the UE is required to re-establish the PDN connection. Then, after the UE releases the PDN connection, Initiate the process of rebuilding the PDN connection. During the process of reestablishing the PDN connection, the network side device (such as the MME) will select a gateway GW (PGW or LGW) that is closer to the current location of the UE to optimize the data transmission path. Since the reconstructed PDN connection is different from the GW of the established PDN connection before the re-establishment, under the existing mechanism, when the SIPTO is executed, the IP flows transmitted through the established PDN connection before the re-establishment will be completely interrupted, thereby failing to ensure IP continuity. Sexuality, this operation has less impact on short-lived flows (ie, IP flows that require low IP continuity, such as browsing web pages), but for long-lived flows (long-lived flows) ) / real-time flows (ie IP flows that require high IP continuity, such as voice calls, file transfer protocols (File Transport) Protocol, FTP), etc. have a great impact and affect the user's service experience.

Summary of the invention

The embodiment of the invention provides a method and a device for guaranteeing IP continuity, which solves the problem that the IP flow transmitted by the PDN connection established before the reconstruction is completely interrupted when the SIPTO is executed under the existing mechanism, and thus the IP continuity cannot be guaranteed. Sexual problem.

The embodiment of the invention provides a method for guaranteeing IP continuity, the method comprising:

The terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The terminal notifies the determined PDN connection to the network side device.

As a first implementation manner, the terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when performing the SIPTO function, including: the terminal is established by itself and related to the APN with SIPTO permission. In the PDN connection, it is determined that the PDN connection of the specific type of IP flow is currently transmitted, and the determined PDN connection is determined to be that the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The terminal notifying the determined PDN connection to the network side device, the method includes: the terminal sending a first request message to the network side device, and carrying the network side device determined by the terminal in the first request message It is not necessary to initiate information about a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function.

Further, after the terminal sends the first request message to the network side device, the method further includes:

After the terminal receives the first reply message returned by the network side device, the network side device determined by the storage itself does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

After the terminal notifies the determined PDN connection to the network side device, the method further includes: when the determined network side device performs the SIPTO function, does not need to initiate the deactivation process carrying the reactivation request. After the PDN connection is changed, the terminal determines that the updated network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The terminal sends a second request message to the network side device, and the updated network side device does not need to initiate a PDN carrying a deactivation process with a reactivation request when performing the SIPTO function in the second request message. Information about the connection; and,

After receiving the second reply message returned by the network side device, the terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

As an optimization manner of the first implementation manner, the terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when performing the SIPTO function, including: the terminal receives the network. After the first notification message sent by the side device, the PDN connection that is currently established and related to the APN carried in the first notification message is determined, and the PDN connection of the specific type of IP flow is currently determined, and the PDN connection is determined. The PDN connection is determined to be that the network side device does not need to initiate a PDN connection carrying a deactivation process with a reactivation request, and the first notification message carries an APN that needs to perform a SIPTO function; or the terminal receives After the second notification message sent by the network side device, determining, from the PDN connection that is established by itself and related to the APN with the SIPTO permission, the PDN connection currently transmitting the specific type of IP flow, and determining the PDN connection. The PDN connection is determined to be that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The terminal notifying the determined PDN connection to the network side device, the method includes: the terminal sending a third reply message to the network side device, and carrying the network side device determined by the terminal in the third reply message It is not necessary to initiate information about a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function.

As a second implementation manner, if the terminal currently needs to transmit a specific type of IP stream and needs to establish a new PDN connection for transmission, then:

The terminal determines that the network side device does not need to initiate the PDN connection of the deactivation process that carries the reactivation request, and the terminal determines that the new PDN connection is not required to be carried by the network side device when performing the SIPTO function. a PDN connection with a deactivation process that reactivates the request;

And the terminal sends the PDN connection request message to the network side device, where the terminal sends a PDN connection request message to the network side device, and carries the PDN connection request message to indicate that the terminal requests the establishment. The PDN connection is a indication that the network side device does not need to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

After the terminal sends the PDN connection request message to the network side device, the method further includes:

After the terminal receives the PDN connection accept message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. The information about the new PDN connection, where the PDN connection accept message carries prompt information indicating that the indication information carried by the terminal in the PDN connection request message is accepted.

Based on any of the foregoing embodiments, as a third implementation manner, if the terminal currently needs to transmit a specific type of IP flow, and needs to establish a dedicated bearer in the PDN connection established by the terminal to transmit:

The terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when performing the SIPTO function, and the method includes: the terminal does not need to determine that the locally stored network side device performs the SIPTO function. When the PDN connection that initiates the deactivation process with the reactivation request does not include the PDN connection corresponding to the dedicated bearer to be established, the PDN connection corresponding to the dedicated bearer to be established is determined as the network side device does not perform the SIPTO function. A PDN connection carrying a deactivation procedure with a reactivation request needs to be initiated;

Notifying the determined PDN connection to the network side device, the terminal includes: the terminal is in the network The request bearer resource modification message sent by the side device carries the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, and the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. Instructions.

Further, after the terminal sends the request bearer resource modification message to the network side device, the method further includes:

After receiving the bearer setup request message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when the SIPTO function is executed. The information about the PDN connection corresponding to the dedicated bearer, where the bearer setup request message carries the prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message.

Based on any of the above embodiments, as a fourth implementation manner, if the terminal currently needs to transmit a specific type of IP flow, and can use the established bearer of the established PDN connection of the terminal to transmit, then:

The terminal determines that the network side device does not need to initiate a PDN connection that carries the deactivation process with the reactivation request, and the terminal does not need to initiate carrying when determining that the locally stored network side device performs the SIPTO function. When the PDN connection of the deactivation process with the reactivation request does not include the PDN connection used for transmitting the specific type of IP flow, the PDN connection used for transmitting the specific type of IP flow is determined as the network side device is executing. The SIPTO function does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request;

The terminal notifying the determined PDN connection to the network side device, the method includes: the terminal sending a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is the current transmission a PDN connection used by a specific type of IP flow, and carrying a PDN connection used to indicate that the terminal requests to establish a PDN connection that does not need to initiate a deactivation process carrying a reactivation request when the SIPTO function is performed by the network side device. Instructions.

The terminal receives the PDN connection reject message returned by the network side device, and the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and increases the current transmission. The information of the PDN connection used by the specific type of IP flow, where the PDN connection reject message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Based on any of the foregoing embodiments, if the network side device determined by the terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation process, the PDN connection of the specific type of IP stream is completed and is no longer transmitted. For any particular type of IP flow, the method further includes:

For the PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any particular type of IP flow, the terminal notifies the network side device that when the SIPTO function is performed, the PDN connection may be initiated and carried The requesting deactivation process is activated, and the locally stored network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and deletes the information of the PDN connection.

Further, for the transmission of the specific type of IP stream that has been completed and no longer transmitting any particular type of IP stream PDN connection:

The terminal initiates a release process of the PDN connection to the network side device; or

The terminal initiates a release process and a reconstruction process of the PDN connection to the network side device; or

The terminal sends a request bearer resource modification message to the network side device, and the PDN connection corresponding to the bearer that is requested to be modified by the terminal when the SIPTO function is performed by the network side device may be initiated in the request bearer resource modification message. The indication information carrying the deactivation process of the reactivation request, and after receiving the deactivated evolved packet system EPS bearer context request message or the session management request message returned by the network side device, the locally stored network side device is performing SIPTO The function does not need to initiate the information of deleting the PDN connection in the PDN connection carrying the deactivation procedure with the reactivation request, where the deactivated EPS bearer context request message or the session management request message is carried in the request to indicate that the accepting terminal is in the request bearer The prompt information of the indication information carried in the resource modification message; or

The terminal sends a PDN connection request message to the network side device, and the PDN connection request message carries a PDN connection that is requested to be established by the network side device to perform the SIPTO function, and may initiate a reactivation request. The indication information of the deactivation process, and after receiving the PDN connection reject message returned by the network side device, the locally stored network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. Deleting the information of the PDN connection, wherein the PDN connection requested by the PDN connection request message is a PDN connection in which the transmission of the specific type of IP stream is completed and no specific type of IP flow is transmitted anymore, the PDN connection The reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

In the embodiment of the present invention, the specific type of IP flow includes a long-lived IP flow and a real-time IP flow, where the long-lived IP flow refers to an IP flow whose data transmission time is greater than a set threshold.

The embodiment of the invention further provides a method for guaranteeing IP continuity, the method comprising:

The network side device that obtains the terminal notification by the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

When performing the SIPTO function, for the APN associated with the SIPTO grant and when the SIPTO function is executed, it is not necessary to initiate a PDN connection carrying the deactivation procedure with the reactivation request, the network side device does not initiate the carrying of the reactivation request. Activation process.

In an implementation, the network side device that the network side device obtains the terminal notification does not need to initiate the PDN connection that carries the deactivation process with the reactivation request when performing the SIPTO function, including:

The network side device receives the first request message sent by the terminal, where the network side device that is determined by the terminal in the first request message does not need to initiate the PDN connection of the deactivation process that carries the reactivation request when performing the SIPTO function. Related Information;

Alternatively, the network side device sends a first notification message to the terminal when determining to perform the SIPTO function, and Carrying, in the first notification message, an APN that needs to perform a SIPTO function, to indicate that the terminal sends the APN related to the first notification message to the network side device, and does not need to initiate carrying when performing the SIPTO function. Corresponding information of the PDN connection of the deactivation process of the reactivation request; and receiving a third reply message returned by the terminal, where the network side device determined by the terminal carrying the third reply message does not need to initiate when performing the SIPTO function Information about the PDN connection carrying the deactivation process of the reactivation request;

Or the network side device sends a second notification message to the terminal to instruct the terminal to send to the network side device that the network side device does not need to initiate a deactivation process carrying the reactivation request when performing the SIPTO function. Corresponding information of the PDN connection; and receiving a third reply message returned by the terminal, wherein the third reply message carries the network side device determined by the terminal, and does not need to initiate a reactivation request when performing the SIPTO function. Information about the PDN connection of the activation process;

Or the network side device receives the PDN connection request message sent by the terminal, where the PDN connection request message carries a new PDN connection that is used to indicate that the terminal requests to establish, and the network side device does not need to perform the SIPTO function. Initiating an indication of a PDN connection carrying a deactivation procedure with a reactivation request;

Or the network side device receives the request bearer resource modification message sent by the terminal, where the request bearer resource modification message carries a PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal to be a network side device, and performs SIPTO. The function does not need to initiate an indication of a PDN connection carrying a deactivation procedure with a reactivation request;

Alternatively, the network side device receives the PDN connection request message sent by the terminal, and when it is determined that the PDN connection requested by the PDN connection request message is a PDN connection established by the terminal, the PDN connection request message is requested to be established. The PDN connection is determined to be that the network side device does not need to initiate a PDN connection carrying the deactivation procedure of the reactivation request when performing the SIPTO function, where the PDN connection request message carries a PDN connection indicating that the terminal requests to establish the network. The side device does not need to initiate an indication of the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

Further, the method further includes: after receiving the first request message sent by the terminal, the network side device does not need to initiate the carrying of the reactivation request for each network side device carried in the first request message when performing the SIPTO function. The PDN connection of the activation process stores, in the context of the locally stored PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is executed, and the terminal is Return the first reply message to confirm; or,

After receiving the third reply message sent by the terminal, the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request for each network side device carried in the third reply message when performing the SIPTO function. And storing, in a context of the locally stored PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function; or

After the network side device receives the PDN connection request message sent by the terminal, it is requested to be established by the terminal. In the context of the PDN connection, storing information indicating that the deactivation procedure carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returning a PDN connection accept message to the terminal, the PDN connection accept message Carrying prompt information indicating that the terminal receives the indication information carried in the PDN connection request message; or

After receiving the request bearer resource modification message sent by the terminal, the network side device stores, in the context of the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, to indicate that the PDN connection is not carried when the SIPTO function is executed. Retrieving the information of the deactivation process of the request, and returning a bearer setup request message to the terminal, where the bearer setup request message carries prompt information indicating that the indication information carried by the terminal in the request bearer resource modification message is accepted ;or,

After receiving the PDN connection request message sent by the terminal, the network side device determines the PDN requested by the PDN connection request message after the PDN connection requested by the PDN connection request message is the PDN connection established by the terminal. The context of the connection stores information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returns a PDN connection reject message to the terminal, where the PDN connection reject message is carried It is used to indicate prompt information that accepts the indication information carried by the terminal in the PDN connection request message.

Based on any of the foregoing embodiments, the method further includes: the network side device is connected to the second request message sent by the receiving terminal, where the second request message carries the updated network side device determined by the terminal The SIPTO function does not need to initiate information about the PDN connection carrying the deactivation process with the reactivation request;

The network side device does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when the SIP side function is executed according to the updated network side device carried in the second request message, and the locally stored network side device is updated. When the SIPTO function is executed, it is not necessary to initiate a PDN connection carrying the deactivation process with the reactivation request, and return a second reply message to the terminal for confirmation.

Based on any of the foregoing embodiments, the method further includes: the network side device receiving, by the terminal, the network side device determined by the terminal for performing the SIPTO function does not need to initiate carrying the reactivation when performing the SIPTO function. After the PDN connection of the requested deactivation process can initiate the notification of the deactivation process carrying the reactivation request, in the context of the locally stored PDN connection, the deleted storage is used to indicate that the SIPTO function is not The PDN connection initiates the information carrying the deactivation process with the reactivation request.

After the network side device receives the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal, the stored information is deleted to indicate that the SIPTO function is not performed. The PDN connection initiates the information of the deactivation process that carries the reactivation request, and returns an deactivated EPS bearer context request message to the terminal, where the request bearer resource modification message is carried in the device to indicate that the network side device is performing the SIPTO function. The PDN connection corresponding to the bearer that is requested to be modified by the terminal may initiate the indication information of the deactivation process carrying the reactivation request, where the deactivated EPS bearer context request message is carried. And the prompt information for accepting the indication information carried by the terminal in the request bearer resource modification message; or

After receiving the request bearer resource modification message sent by the terminal, the network side device deletes the stored context for indicating that the SIPTO function is not performed in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal. Initiating information about the deactivation process carrying the reactivation request for the PDN connection, and returning a session management request message to the terminal, where the request bearer resource modification message is carried in the network device to indicate that the network side device is performing the SIPTO function. The PDN connection corresponding to the bearer that is requested to be modified by the terminal may initiate the indication information of the deactivation process that carries the reactivation request, where the session management request message is used to indicate that accepting the terminal to carry in the request bearer resource modification message a message indicating the information; or,

Receiving, by the network side device, the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the locally stored terminal, deleting the stored used to indicate that the PDN connection is not carried when the SIPTO function is executed. Re-activating the information of the requested deactivation process, and returning a PDN connection reject message to the terminal, where the PDN connection request message carries a PDN for indicating that the network side device requests to establish the terminal when performing the SIPTO function. The connection may initiate the indication information of the deactivation process carrying the reactivation request, and the PDN connection rejection message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

An embodiment of the present invention provides a terminal, where the terminal includes:

a processing module, configured to determine that the network side device does not need to initiate a PDN connection carrying a deactivation process with a reactivation request when performing the SIPTO function;

And a notification module, configured to notify the network side device of the PDN connection determined by the processing module.

As a first implementation manner, the processing module is specifically configured to: determine, from a PDN connection that is established by the terminal and related to an APN with a SIPTO license, to currently transmit a PDN connection of a specific type of IP flow, and The determined PDN connection is determined to be that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The notification module is specifically configured to: send a first request message to the network side device, and carry the network side device determined by the first request message in the first request message, and do not need to initiate the reactivation request when performing the SIPTO function. Information about the PDN connection of the activation process.

Further, after the notification module sends the first request message to the network side device, the processing module is further configured to: after receiving the first reply message returned by the network side device, the network side device determined by the storage itself does not need to initiate when performing the SIPTO function. Information about the PDN connection carrying the deactivation process with the reactivation request.

Further, after the notification module notifies the determined PDN connection to the network side device, the processing module is further configured to: when the determined network side device performs the SIPTO function, does not need to initiate a deactivation process carrying the reactivation request After the PDN connection is changed, the terminal determines that the updated network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and receives the network side device After the returned second reply message, the network side device that updates its own storage does not need to initiate the information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The notification module is further configured to: send a second request message to the network side device, and perform, in the second request message, the updated network side device that is determined by the processing module does not need to perform the SIPTO function. Initiating information about the PDN connection carrying the deactivation process with the reactivation request.

As an optimization manner of the first implementation, the processing module is specifically configured to: after receiving the first notification message sent by the network side device, the PDN connection that is established by the terminal and related to the APN carried in the first notification message Determining a PDN connection that currently transmits a specific type of IP flow, and determining the determined PDN connection as a network side device does not need to initiate a PDN connection carrying a deactivation request with a reactivation request when performing the SIPTO function, first The notification message carries the APN that needs to perform the SIPTO function; or, after receiving the second notification message sent by the network side device, determines the current transmission specific type from the PDN connection established by the terminal and related to the APN with the SIPTO permission. The PDN connection of the IP flow, and determining the determined PDN connection as the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The notification module is specifically configured to: send a third reply message to the network side device, and carry the self-determined network side device in the third reply message, and do not need to initiate a reactivation request when performing the SIPTO function. Information about the PDN connection of the deactivation process.

As a second implementation manner, if the terminal needs to transmit a specific type of IP stream and needs to establish a new PDN connection for transmission, the processing module is specifically configured to: determine the new PDN connection as a network. The side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The notification module is specifically configured to: send a PDN connection request message to the network side device, and carry the PDN connection request message in the PDN connection request message to indicate that the PDN connection requested by the terminal is a network side device, and does not need to initiate carrying when performing the SIPTO function. There is an indication of the PDN connection for the deactivation process of the reactivation request.

Further, after the notification module sends the PDN connection request message to the network side device, the processing module is further configured to: after receiving the PDN connection accept message returned by the network side device, the locally stored network side device does not need to initiate when performing the SIPTO function. In the PDN connection carrying the deactivation process of the reactivation request, the information about the new PDN connection is added, and the PDN connection accept message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Based on any of the foregoing embodiments, as a third implementation manner, if the terminal currently needs to transmit a specific type of IP flow, and needs to establish a dedicated bearer to transmit in the established PDN connection of the terminal, then:

The processing module is specifically configured to: when determining that the locally stored network side device does not need to initiate the PDN connection corresponding to the dedicated bearer that is required to be established, the PDN connection that does not include the dedicated bearer that is required to be used in the process of performing the SIPTO function Determining, by the network side device, the PDN connection that carries the deactivation process carrying the reactivation request when the SIPTO function is performed on the PDN connection corresponding to the dedicated bearer that is required to be established;

The notification module is specifically configured to: when the request bearer resource modification message sent to the network side device carries the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, the network side device does not need to initiate carrying the reactivation when performing the SIPTO function. An indication of the PDN connection of the requested deactivation process.

Further, after the notification module sends the request bearer resource modification message to the network side device, the processing module is further configured to: after receiving the bearer setup request message returned by the network side device, the locally stored network side device is executing The SIPTO function does not need to initiate the PDN connection carrying the deactivation process with the reactivation request, and the information about the PDN connection corresponding to the dedicated bearer is added, where the bearer setup request message is carried in the bearer to indicate that the accepting terminal is requesting the bearer resource. Modify the prompt information of the indication information carried in the message.

Based on any of the foregoing embodiments, as a fourth implementation manner, if the terminal currently needs to transmit a specific type of IP flow, and can use the established bearer of the established PDN connection of the terminal to transmit, then:

The processing module is specifically configured to: when determining that the locally stored network side device performs the SIPTO function, the PDN connection that does not need to initiate the deactivation process carrying the reactivation request does not include the current use of transmitting the specific type of IP flow. When the PDN is connected, the PDN connection used for transmitting the specific type of IP flow is determined as the PDN connection of the network side device that does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function;

The notification module is specifically configured to: send a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is a PDN connection used for transmitting a specific type of IP flow, and is carried to indicate that the terminal requests The established PDN connection is that the network side device does not need to initiate the indication of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Further, after the notification module sends the PDN connection request message to the network side device, the processing module is further configured to: receive the PDN connection reject message returned by the network side device, when the locally stored network side device performs the SIPTO function In the PDN connection that does not need to initiate the deactivation process with the reactivation request, the information of the PDN connection used for transmitting the specific type of IP flow is increased, wherein the PDN connection reject message is carried in the PDN to indicate that the receiving terminal is in the PDN. The prompt information of the indication information carried in the connection request message.

Based on any of the foregoing embodiments, if the network side device determined by the processing module performs the SIPTO function, the PDN connection carrying the deactivation process carrying the reactivation request does not need to complete the transmission of the specific type of IP stream and is no longer To transfer any particular type of IP flow, then:

The processing module is further configured to: for the PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any specific type of IP flow, the locally stored network side device does not need to initiate carrying when performing the SIPTO function. In the PDN connection with the deactivation process of the reactivation request, the information of the PDN connection is deleted;

The notification module is further configured to notify the network side device to connect to the PDN when performing the SIPTO function for the PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any specific type of IP flow. A deactivation process carrying a reactivation request can be initiated.

The notification module is specifically configured to initiate a release process of the PDN connection to the network side device; or

The notification module is specifically configured to initiate a release process and a reconstruction process of the PDN connection to the network side device; or

The notification module is specifically configured to send a request bearer resource modification message to the network side device, and the bearer resource modification message carries a bearer corresponding to the bearer requested by the network side device when the SIPTO function is executed. The PDN connection may initiate the indication information carrying the deactivation process with the reactivation request; and the processing module is specifically configured to store locally after receiving the deactivated EPS bearer context request message or the session management request message returned by the network side device The network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request to delete the information of the PDN connection when performing the SIPTO function, and the deactivated EPS bearer context request message or the session management request message is carried in the Receiving the prompt information of the indication information carried in the requesting bearer resource modification message by the terminal; or

The notification module is specifically configured to send a PDN connection request message to the network side device, and carry the PDN connection request message in the PDN connection request message to indicate that the PDN connection requested by the network side device for the terminal is initiated to be carried. The indication information of the deactivation process of the reactivation request; and the processing module is specifically configured to: after receiving the PDN connection rejection message returned by the network side device, the locally stored network side device does not need to initiate carrying when performing the SIPTO function The information of the PDN connection is deleted in the PDN connection of the deactivation process with the reactivation request, wherein the PDN connection requested by the PDN connection request message is the transmission of the completed specific type of IP flow and no longer transmits any specific A PDN connection of the IP flow of the type, the PDN connection reject message carrying the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

The embodiment of the invention provides a network side device, including:

a processing module, where the network side device used to obtain the terminal notification does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The SIPTO execution module is configured to perform a SIPTO function, and is not required to initiate a PDN connection carrying a deactivation request carrying a reactivation request when the SIPTO function is performed, and does not initiate a PDN connection carrying a reactivation request. Deactivate the process.

In an implementation, the processing module is specifically configured to: receive a first request message sent by the terminal, where the network side device that is determined by the terminal in the first request message does not need to initiate carrying a reactivation when performing the SIPTO function. Information about the PDN connection of the requested deactivation process; or,

When it is determined that the SIPTO function is performed, the first notification message is sent to the terminal, and the APN that needs to perform the SIPTO function is carried in the first notification message, to indicate that the terminal sends the APN related to the first notification message to the network side device. And the information about the PDN connection carrying the deactivation process with the reactivation request is not required to be performed when the SIPTO function is performed; and the third reply message returned by the terminal is received, and the network side device determined by the terminal in the third reply message is executed. The SIPTO function does not need to initiate the phase of the PDN connection carrying the deactivation process with the reactivation request. Information; or,

Sending a second notification message to the terminal, to instruct the terminal to send, to the network side device, the network side device does not need to initiate related information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and receiving the terminal a third reply message, the network side device determined by the terminal carrying the third reply message does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; or

Receiving a PDN connection request message sent by the terminal, where the PDN connection request message carries a new PDN connection that is used to indicate that the terminal requests to establish, and the network side device does not need to initiate deactivation with a reactivation request when performing the SIPTO function. Indication of the PDN connection of the process; or,

Receiving a request bearer resource modification message sent by the terminal, where the request bearer resource modification message carries a PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal, and the network side device does not need to initiate retransmission when performing the SIPTO function. The indication of the PDN connection of the requested deactivation process; or,

Receiving a PDN connection request message sent by the terminal, and determining that the PDN connection established by the PDN connection request message is a PDN connection established by the PDN connection request message, determining the PDN connection established by the PDN connection request message as the network side The device does not need to initiate a PDN connection carrying the deactivation process with a reactivation request, where the PDN connection request message carries a PDN connection that is required to be established by the terminal to be a network side device when performing the SIPTO function. There is no need to initiate an indication of a PDN connection carrying a deactivation procedure with a reactivation request.

Further, the processing module is further configured to: after receiving the first request message sent by the terminal, do not need to initiate a reactivation request for each network side device carried in the first request message when performing the SIPTO function. The PDN connection of the deactivation process stores, in the context of the locally stored PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing SIPTO, and returns to the terminal. The first reply message is confirmed;

Or, after receiving the third reply message sent by the terminal, each network side device carried in the third reply message does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. Storing, in the context of the locally stored PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed;

Or, after receiving the PDN connection request message sent by the terminal, in a context of the PDN connection requested by the terminal, storing, in the context of performing the SIPTO function, not carrying the reactivation request for the PDN connection Activating the process information, and returning a PDN connection accept message to the terminal, where the PDN connection accept message carries prompt information indicating that the accepting terminal carries the indication information carried in the PDN connection request message;

Or, after receiving the request bearer resource modification message sent by the terminal, in a context of a PDN connection corresponding to the dedicated bearer that the terminal requests to establish, storing is used to indicate that the PDN is not targeted when performing the SIPTO function. The connection initiates the information of the deactivation process that carries the reactivation request, and returns a bearer setup request message to the terminal, where the bearer setup request message carries the indication information that is received by the terminal in the request bearer resource modification message. Prompt information;

Alternatively, after receiving the PDN connection request message sent by the terminal and determining that the PDN connection requested by the PDN connection request message is a PDN connection established by the terminal, the context of the PDN connection requested by the PDN connection request message is established. And storing information for indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returning a PDN connection reject message to the terminal, where the PDN connection reject message is carried in the representation And receiving the prompt information of the indication information carried by the terminal in the PDN connection request message.

In an implementation, the processing module is further configured to: receive a second request message sent by the terminal, where the updated network side device that is determined by the terminal and that is determined by the terminal does not need to perform a SIPTO function. Initiating information about the PDN connection carrying the deactivation process with the reactivation request; and, according to the updated network side device carried in the second request message, does not need to initiate the carrying of the reactivation request when performing the SIPTO function. The information about the PDN connection of the activation process is updated. The network side device that updates the local storage does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and returns a second reply message to the terminal for confirmation.

In an implementation, the processing module is further configured to: when receiving, by the terminal, the network side device determined by the terminal for performing the SIPTO function does not need to initiate a deactivation process carrying the reactivation request when performing the SIPTO function. After the PDN connection can initiate the notification of the deactivation process with the reactivation request, in the context of the locally stored PDN connection, the deleted stored information is used to indicate that the PDN connection is not carried when the SIPTO function is executed. There is information about the deactivation process of the reactivation request.

Further, the processing module is specifically configured to: after receiving the request bearer resource modification message sent by the terminal, delete the stored used to indicate that the SIPTO is executed in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal. The function does not initiate the information about the deactivation process that carries the reactivation request for the PDN connection, and returns an deactivated EPS bearer context request message to the terminal, where the request bearer resource modification message is carried in the device to indicate that the network side device is performing SIPTO. The PDN connection corresponding to the bearer that is requested to be modified by the terminal may initiate the indication information of the deactivation process carrying the reactivation request, and the deactivated EPS bearer context request message is carried in the request to indicate that the receiving terminal is requesting the bearer resource modification. The prompt information of the indication information carried in the message; or,

After receiving the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal, deleting the stored information indicating that the PDN connection is not performed when the SIPTO function is executed. Initiating information about the deactivation process that carries the reactivation request, and returning a session management request message to the terminal, where the request bearer resource modification message is carried in the network device to indicate that the network side device is performing the SIPTO function for the terminal. The PDN connection corresponding to the bearer requesting the modification may initiate the deactivation with the reactivation request. The indication information of the process, the session management request message carries prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; or

Receiving a PDN connection request message sent by the terminal, deleting, in the context of the PDN connection requested by the locally stored terminal, that the stored re-activation request is not carried out for the PDN connection when the SIPTO function is executed. And de-initiating the information of the process, and returning a PDN connection reject message to the terminal, where the PDN connection request message carries a PDN connection that is used to indicate that the network side device is requested to establish the SIPTO function when the SIPTO function is performed. The indication information of the deactivation process of the request is reactivated, and the PDN connection rejection message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

An embodiment of the present invention further provides a terminal, including a transceiver, at least one processor connected to the transceiver, and a memory respectively connected to the transceiver and the processor, wherein the processor is configured to determine The network side device does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function; the transceiver is configured to notify the network side device of the PDN connection determined by the processor.

In an implementation, as a first preferred implementation manner, the processor is configured to: determine, from a PDN connection that is established by the terminal and related to the APN with SIPTO permission, to currently transmit a PDN of a specific type of IP flow. Connecting, and determining the determined PDN connection as the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The transceiver is configured to: send a first request message to the network side device, and carry information related to the PDN connection determined by the processor in the first request message.

Based on any of the above embodiments, further, the transceiver is further configured to receive the first reply message returned by the network side device; the processor is further configured to: when the network side device determined by the memory storage itself performs the SIPTO function There is no need to initiate information on the PDN connection carrying the deactivation procedure with the reactivation request.

Based on any of the foregoing embodiments, after the transceiver notifies the network side device of the PDN connection determined by the processor, the processor is further configured to: when the determined network side device performs the SIPTO function, does not need to initiate After the PDN connection of the deactivation process carrying the reactivation request is changed, it is determined that the updated network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and, upon receiving After the second reply message returned by the network side device, the network side device stored in the update memory does not need to initiate the information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The transceiver is further configured to: send a second request message to the network side device, and carry the updated network side device determined by the processor in the second request message, and the device does not need to initiate carrying Information about the PDN connection of the deactivation process of the request activation.

As an optimization of the first preferred implementation, the processor is specifically configured to: after receiving the first notification message sent by the network side device, the PDN related to the APN that is established by the terminal and carried in the first notification message In the connection, the PDN connection that currently transmits a specific type of IP flow is determined, and the first notification message carries a SIPTO function to be performed. The APN is enabled; or, after receiving the second notification message sent by the network side device, determining, from the PDN connection established by the terminal and related to the APN with the SIPTO permission, the PDN connection currently transmitting the specific type of IP flow;

The transceiver is configured to: send a third reply message to the network side device, and carry the network side device determined by the network side device in the third reply message that does not need to initiate the reactivation request when performing the SIPTO function. Information about the PDN connection of the activation process.

As a second preferred implementation manner, if the terminal currently needs to transmit a specific type of IP flow and needs to establish a new PDN connection for transmission, then:

The processor is configured to: determine the new PDN connection as the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, as described in the foregoing manner B;

The transceiver is configured to: send a PDN connection request message to the network side device, and carry, in the PDN connection request message, a PDN connection that is used to indicate that the terminal requests to establish the network side device, and does not need to initiate when performing the SIPTO function. An indication of the PDN connection carrying the deactivation procedure with the reactivation request.

Further, after the transceiver sends the PDN connection request message to the network side device, the transceiver is further configured to: receive the PDN connection accept message returned by the network side device; the processor is further configured to execute on the network side device stored in the memory The SIPTO function does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request, and the information of the new PDN connection is added, and the PDN connection accept message carries an indication indicating that the accepting terminal carries in the PDN connection request message. Informational prompt information.

Based on any of the foregoing embodiments, as a third preferred implementation manner, if the terminal currently needs to transmit a specific type of IP flow, and a dedicated bearer needs to be established in the established PDN connection of the terminal for transmission, the processor is configured to be specific. When the PDN connection for the network side device stored in the determination memory does not need to initiate the deactivation process carrying the reactivation request does not include the PDN connection corresponding to the dedicated bearer to be established, the required establishment is required. The PDN connection corresponding to the dedicated bearer is determined to be that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The transceiver is configured to be used in the request bearer resource modification message sent to the network side device to carry the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, and the network side device does not need to initiate carrying when performing the SIPTO function. Reinstructs the indication of the PDN connection for the requested deactivation process.

Further, after the transceiver sends the request bearer resource modification message to the network side device, the transceiver is further configured to: receive the bearer setup request message returned by the network side device; the processor is further configured to: on the network side where the memory is stored The device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request, and the information about the PDN connection corresponding to the dedicated bearer is added, and the bearer setup request message is carried in the bearer setup request message to indicate that the accepting terminal is requesting the bearer resource. Modify the prompt information of the indication information carried in the message.

Based on any of the foregoing embodiments, as a fourth preferred implementation manner, if the terminal currently needs to transmit a specific type of IP flow and can transmit using the established PDN connection of the terminal, then:

The processor is configured to: use, in determining that the network side device stored in the memory does not need to initiate the deactivation process carrying the reactivation request, the PDN connection that does not include the current type of IP stream is used in performing the SIPTO function. When the PDN is connected, the PDN connection used for transmitting the specific type of IP stream is determined as the PDN connection of the network side device that does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function;

The transceiver is configured to: send a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is a PDN connection used for transmitting a specific type of IP flow, and is carried The indication that the PDN connection requested by the terminal is established is that the network side device does not need to initiate the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

Further, after the transceiver sends the request bearer resource modification message to the network side device, the transceiver is further configured to: receive the PDN connection reject message returned by the network side device; the processor is further configured to: on the network side where the memory is stored The device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and adds information about the PDN connection used for transmitting the specific type of IP flow, wherein the PDN connection reject message is carried in the message. The prompt information indicating that the terminal carries the indication information carried in the PDN connection request message.

Based on any of the foregoing embodiments, the network side device determined by the processor does not need to initiate the PDN connection carrying the deactivation process with the reactivation procedure to complete the transmission of the specific type of IP stream and no longer transmits any specific when performing the SIPTO function. Type of IP flow, then:

The processor is further configured to: for the above-mentioned PDN connection that has completed transmission of a specific type of IP stream and no longer transmits any particular type of IP stream, the network side device stored in the memory does not need to initiate carrying when performing SIPTO function In the PDN connection with the deactivation process of the reactivation request, the information of the PDN connection is deleted; and,

The transceiver is further configured to: for the above-mentioned PDN connection that has completed transmission of a specific type of IP stream and no longer transmits any particular type of IP flow, notifying the network side device that the PDN connection can be initiated for performing the SIPTO function Carry the deactivation process with the reactivation request.

Further, for the above-mentioned PDN connection that has completed transmission of a particular type of IP flow and no longer transmits any particular type of IP flow:

The transceiver is configured to initiate a release process of the PDN connection to the network side device;

Or the transceiver is configured to initiate a release process and a re-establishment process of the PDN connection to the network side device;

Alternatively, the transceiver is configured to send a request bearer resource modification message to the network side device, and the bearer resource modification message carries a bearer corresponding to the request that the network side device requests to modify when performing the SIPTO function. The PDN connection may initiate indication information carrying a deactivation procedure with a reactivation request, and receive a deactivated EPS bearer context request message or a session management request message returned by the network side device; the processor is configured to be specifically stored in the memory. The network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request to delete the PDN connection information when performing the SIPTO function, where the deactivated EPS bearer is The request message or the session management request message carries the prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; or

The transceiver is configured to send a PDN connection request message to the network side device, and is carried in the PDN connection request message to indicate that the network side device can initiate a reactivation request for the PDN connection when performing the SIPTO function. And the indication information of the deactivation process, and receiving the PDN connection rejection message returned by the network side device; the processor is configured to be used in the network side device stored in the memory, when the SIPTO function is executed, does not need to initiate the carrying of the reactivation request The information of the PDN connection is deleted in the PDN connection of the activation process, wherein the PDN connection requested by the PDN connection request message is the PDN of the specific type of IP flow and the PDN of any specific type of IP stream is no longer transmitted. The PDN connection reject message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

The embodiment of the invention further provides a network side device, comprising a transceiver, at least one processor connected to the transceiver, and a memory respectively connected to the transceiver and the processor, wherein:

The processor is configured to: the network side device that acquires the terminal notification does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and, when performing the SIPTO, is related to the APN with the SIPTO permission Moreover, when performing the SIPTO function, it is not necessary to initiate a PDN connection carrying the deactivation procedure with the reactivation request, and does not initiate the deactivation process carrying the reactivation request.

In implementation, the transceiver is configured to:

Receiving, by the terminal, the first request message sent by the terminal, where the network side device determined by the terminal in the first request message does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; or

When the processor determines to perform the SIPTO function, the first notification message is sent to the terminal, and the APN that needs to perform the SIPTO function is carried in the first notification message, to indicate that the terminal sends the indication to the network side device and the first notification message The APN is related and does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and the third reply message returned by the receiving terminal, where the third reply message carries the network determined by the terminal The side device does not need to initiate information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; or

Sending a second notification message to the terminal, to instruct the terminal to send, to the network side device, information about the PDN connection that the network side device does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function; and the third returned by the receiving terminal a reply message, the network side device determined by the terminal carrying the third reply message does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; or

Receiving a PDN connection request message sent by the terminal, where the PDN connection request message carries a new PDN connection for indicating that the terminal requests to establish that the network side device does not need to initiate a deactivation process carrying the reactivation request when performing the SIPTO function. Indication of the PDN connection; or,

Receiving a request bearer resource modification message sent by the terminal, where the request bearer resource modification message carries a PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal, and the network side device does not need to initiate the reactivation request when performing the SIPTO function. Deactivation of the PDN connection indication process; or,

Receiving a PDN connection request message sent by the terminal, and determining that the PDN connection established by the PDN connection request message is a PDN connection established by the terminal, the PDN connection requested by the PDN connection request message is determined as a network side device. The PDN connection carrying the deactivation process with the reactivation request is not required to be performed, and the PDN connection request message carries the PDN connection that is required to be established by the terminal to be a network side device, and does not need to perform the SIPTO function. Initiating an indication of a PDN connection carrying a deactivation procedure with a reactivation request.

In implementation, the processor is also configured to:

After the transceiver receives the first request message sent by the terminal, each network side device carried in the first request message does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. Storing, in the context of the PDN connection stored in the memory, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing SIPTO, and returning a first reply message to the terminal for confirmation; or,

After receiving the third reply message sent by the terminal, each network side device carried in the third reply message does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and is locally stored. Storing, in the context of the PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed; or

After the transceiver receives the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the terminal stored in the memory, the storage is used to indicate that the PDN connection is not carried when the SIPTO function is executed. Activating the information of the deactivation process of the request, and returning a PDN connection accept message to the terminal, where the PDN connection accept message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message; or

After receiving the request bearer resource modification message sent by the terminal, the transceiver stores, in the context of the PDN connection corresponding to the dedicated bearer that is requested by the terminal that is stored in the memory, is used to indicate that the PDN is not targeted when the SIPTO function is executed. The connection initiates the information of the deactivation process that carries the reactivation request, and returns a bearer setup request message to the terminal, where the bearer setup request message carries the prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message; or,

After the transceiver receives the PDN connection request message sent by the terminal and determines that the PDN connection requested by the PDN connection request message is a PDN connection established by the terminal, the PDN connection request message stored in the memory is requested to be established. The context of the PDN connection stores information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed, and returns a PDN connection reject message to the terminal, The PDN connection reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Further, the transceiver is further configured to: receive a second request message sent by the terminal, where the updated network side device determined by the terminal in the second request message does not need to initiate a reactivation request when performing the SIPTO function. Information about the PDN connection of the deactivation process;

The processor is further configured to update the memory according to the information about the PDN connection carrying the deactivation process with the reactivation request when the updated network side device carried in the second request message does not need to initiate the SIPTO function. The stored network side device does not need to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

Based on any of the foregoing embodiments, the transceiver is further configured to: the network side device determined by the receiving terminal and configured by the terminal for performing the SIPTO does not need to initiate a deactivation process carrying the reactivation request when performing the SIPTO function. The PDN connection may initiate a notification of the deactivation process carrying the reactivation request; the processor is further configured to: in the context of the PDN connection stored in the memory, delete the stored representation for indicating that the SIPTO function is being performed Information about the deactivation process carrying the reactivation request is not initiated for the PDN connection.

Further, the processor is configured to: after the transceiver receives the request bearer resource modification message sent by the terminal, delete the stored indication for execution in the context of the PDN connection requested by the terminal stored in the memory The SIPTO does not initiate the information about the deactivation process that carries the reactivation request for the PDN connection, where the request bearer resource modification message carries the bearer for indicating that the network side device requests the modification when the SIPTO function is executed. The corresponding PDN connection may initiate the indication information of the deactivation process carrying the reactivation request, where the EPS bearer context request message carries the prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; or

After the transceiver receives the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the bearer requested by the terminal stored in the memory, the stored information is deleted to indicate that the SIPTO function is not performed. The PDN connection initiates the information of the deactivation process that carries the reactivation request, and returns a session management request message to the terminal, where the request bearer resource modification message is carried in the device to indicate that the network side device performs the SIPTO function for the terminal. The PDN connection corresponding to the bearer requesting the modification may initiate the indication information of the deactivation process carrying the reactivation request, where the session management request message carries the prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; or,

Receiving, by the transceiver, the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the terminal stored in the memory, deleting the stored information indicating that the PDN connection is not carried when the SIPTO function is executed. Re-activating the information of the requested deactivation process, and returning a PDN connection reject message to the terminal, wherein the PDN connection request message carries a PDN connection that is used to indicate that the network side device is requested to establish the SIPTO function when the SIPTO function is performed. The indication of the deactivation process carrying the reactivation request, the PDN connection is rejected The suffocating message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

The method and device for ensuring IP continuity provided by the embodiment of the present invention, the terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and notifies the network of the determined PDN connection to the network. The side device, so that the network side device does not need to initiate a PDN connection carrying the deactivation process carrying the reactivation request when performing the SIPTO function, and does not initiate carrying the reactivation of the APN with the SIPTO permission and does not initiate the SIPTO function. The requested deactivation process ensures the transmission of long-lived IP flows/real-time IP flows and improves the user's service experience.

DRAWINGS

1 is a schematic diagram of a method for ensuring IP continuity on a terminal side according to the present invention;

2 is a schematic diagram of a method for ensuring IP continuity on a network side according to the present invention;

FIG. 3 is a schematic diagram of a first interaction process in Embodiment 1 of the present invention; FIG.

4 is a schematic diagram of a second interaction process in Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of an interaction process in Embodiment 5 according to the present invention; FIG.

FIG. 6 is a schematic diagram of an interaction process in Embodiment 7 provided by the present invention; FIG.

FIG. 7 is a schematic diagram of a terminal provided by the present invention; FIG.

FIG. 8 is a schematic diagram of a network side device according to the present invention; FIG.

FIG. 9 is a schematic diagram of another terminal provided by the present invention; FIG.

FIG. 10 is a schematic diagram of another network side device according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that, in the embodiment of the present invention, the user equipment (User Equipment, UE) includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN).

In the embodiment of the present invention, the terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and notifies the network side device of the determined PDN connection, so that the network side device is performing SIPTO. When it is related to an APN with SIPTO license and does not need to be sent when performing SIPTO function The PDN connection carrying the deactivation process of the reactivation request does not initiate the deactivation process carrying the reactivation request, thereby ensuring long-lived flows/real-time flows The transmission improves the user's service experience.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides a method for guaranteeing IP continuity on the terminal side. Referring to FIG. 1 , the method includes:

Step 11: The terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Step 12: The terminal notifies the network side device of the PDN connection determined in step 11.

In this step, preferably, the terminal notifies the network side device of the information about the determined PDN connection.

The related information about the PDN connection involved in the embodiment of the present invention (such as the information about the PDN connection that the network side device does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function) may be the default of the PDN connection. The identification information carried. Of course, it can also be other information for identifying the PDN connection.

In the embodiment of the present invention, the terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request, and notifies the network side device of the determined PDN connection, so that the network side device is in the network side device. When the SIPTO function is executed, it is not necessary to initiate a PDN connection carrying the deactivation process with the reactivation request when the SIPTO function is executed, and the deactivation process carrying the reactivation request is not initiated, thereby ensuring The transmission of long-lived flows/real-time flows improves the user's service experience.

In an implementation, in step 11, the terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and includes the following four preferred modes:

In the mode A, the terminal determines, from the PDN connection that is established by itself and related to the APN with the SIPTO permission, that the PDN connection of the specific type of IP stream is currently transmitted, and determines the determined PDN connection as the network side device performs the SIPTO. The function does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request.

In the embodiment of the present invention, the specific type of IP flow includes a long-lived IP flow and a real-time IP flow, where the long-lived IP flow refers to an IP flow whose data transmission time is greater than a set threshold. Correspondingly, an IP flow whose data transmission time is not greater than a set threshold is called a short lifecycle IP flow.

For example, for a long-lived IP flow, a threshold (such as a time threshold T) may be configured for the terminal. For any IP flow transmitted by the terminal, when the terminal determines that the IP flow starts from the transmission, after the time period T Still transmitting, it is determined that the IP flow is a long-lived IP flow; otherwise, the IP flow is determined to be a short-lived IP flow.

For the real-time IP stream, the terminal determines that the value of the QoS Class Identifier (QCI; Quality of Service, QoS) parameter carried by the Evolved Packet System (EPS) transmitting the IP is 1. , determining that the IP flow is a real-time IP flow.

Correspondingly, the step 12 is specifically: the terminal sends the first request message to the network side device, and the network side device determined by the first request message does not need to initiate the carrying of the reactivation request when performing the SIPTO function. Information about the PDN connection of the activation process.

In this manner, the terminal actively initiates a process of determining that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request, that is, the terminal notifies the network side device to perform the SIPTO function in advance. It is not necessary to initiate a PDN connection carrying a deactivation procedure with a reactivation request.

In this manner, the method provided by the embodiment of the present invention further includes: after receiving the first reply message returned by the network side device, the network side device that is determined by the terminal does not need to initiate the reactivation request when performing the SIPTO function. The information about the PDN connection to the deactivation process.

Preferably, the first reply message may carry the prompt information indicating that the network side device determined by the receiving terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and may not carry any Prompt message.

In an implementation, the network side device may perform the confirmation by directly returning the first reply message, and may also perform the first request message sent by the terminal, or may be executed on each network side device determined by the terminal. The SIPTO function does not need to initiate a PDN connection carrying the deactivation process of the reactivation request, and determines whether the PDN connection is related to the APN with the SIPTO permission, and carries the network side determined by the terminal in the first reply message. The device does not need to initiate information about a PDN connection that is not associated with an APN with SIPTO grant in the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

Correspondingly, the terminal receives the PDN connection that is not related to the APN with SIPTO permission in the PDN connection that carries the deactivation process that carries the reactivation request when the network side device determined by the terminal determines that the network side device performs the SIPTO function. After the first reply message of the related information, the network side device determined by itself does not need to initiate the PDN in the PDN connection carrying the deactivation process with the reactivation request except the PDN indicated in the first reply message when performing the SIPTO function. Other PDN connections other than the connection, it is determined that the final network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and stores the final network side device does not need to initiate carrying when performing the SIPTO function. There is information about the PDN connection of the deactivation process of the reactivation request; otherwise, all the network side devices determined by the terminal storage itself do not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Further, the method of the embodiment of the present invention further includes:

After the determined network side device does not need to initiate a change of the PDN connection carrying the deactivation request with the reactivation request, the terminal determines that the updated network side device does not need to initiate carrying when performing the SIPTO function. Re-activating the PDN connection of the requested deactivation process;

The terminal sends a second request message to the network side device, and the updated network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function in the second request message. Information; and,

After receiving the second reply message returned by the network side device, the terminal updating the network side device stored by itself does not need to initiate the information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Specifically, if the at least one network side device determined by the terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request to complete the transmission of the specific type of IP stream, the network side device When the SIPTO function is performed, the deactivation process carrying the reactivation request may be initiated for the PDN connection; or the network side device determined by the terminal in the PDN connection established by the terminal does not need to initiate carrying when performing the SIPTO function. A PDN connection other than the PDN connection of the deactivation process with the reactivation request starts to transmit a specific type of IP flow. At this time, the network side device does not initiate a reactivation request for the PDN connection when performing the SIPTO function. Deactivate the process. In the above two cases, the PDN connection of the network side device that is determined by the terminal does not need to initiate the deactivation process with the reactivation request when the SIPTO function is executed. In this scenario, the terminal needs to determine the updated network side. The device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request, and notifies the network side device, so that the network side device can update the network side device saved by itself without performing the SIPTO function. Initiate information about the PDN connection carrying the deactivation process with the reactivation request.

In the above manner, after receiving the second request message sent by the terminal, the network side device directly confirms the second reply message returned by the terminal.

Preferably, the second reply message may carry the prompt information indicating that the updated network side device determined by the receiving terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, or may Do not bring any tips.

In an implementation, the network side device may perform the confirmation by directly returning the second reply message, or after receiving the second request message sent by the terminal, or may be performed on the updated network side device determined by the terminal. When the SIPTO function is executed, the PDN connection carrying the deactivation process with the reactivation request is not required to be initiated, and it is determined whether the PDN connection is related to the APN with the SIPTO permission, and the second reply message carries the update determined by the terminal. The subsequent network side device does not need to initiate information about the PDN connection that is not related to the APN with the SIPTO grant in the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

Correspondingly, the terminal does not need to initiate the PDN connection carrying the deactivation process carrying the reactivation request when the network side device carrying the update determined by the terminal does not need to initiate the SIPTO function, and is not related to the APN with the SIPTO permission. After the second reply message of the related information of the PDN connection, the updated network side device determined by itself does not need to initiate the PDN connection carrying the deactivation process with the reactivation request in addition to the second reply when performing the SIPTO function. The other PDN connection except the PDN connection indicated in the message is determined to be that the final network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and stores the determined final network side device in the It is not necessary to initiate deactivation with a reactivation request when performing the SIPTO function. The information of the PDN connection of the process; otherwise, all the updated network side devices determined by the terminal storage itself do not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

In order to save the signaling overhead, as a further optimization of the mode A, the following two methods are specifically included:

As a first optimization method, the step 11 includes: after receiving the first notification message sent by the network side device, the terminal determines, according to the PDN connection that is established by the terminal and related to the APN carried in the first notification message, Transmitting a PDN connection of a specific type of IP flow, where the first notification message carries an APN that needs to perform a SIPTO function, and determines the determined PDN connection that the network side device does not need to initiate carrying a reactivation when performing the SIPTO function. The requested PDN connection for the deactivation process.

In the first optimization mode, the first notification message is used to instruct the terminal to send the network side device related to the APN indicated in the first notification message to the network side device, and the network side device does not need to initiate the reactivation request when performing the SIPTO function. Information about the PDN connection of the deactivation process.

In the first optimization mode, correspondingly, the step 12 is specifically: the terminal sends a third reply message to the network side device, and the network side device that is determined by the third reply message does not need to perform the SIPTO function. Initiating information about the PDN connection carrying the deactivation process with the reactivation request.

As a second optimization method, step 11 includes: after receiving the second notification message sent by the network side device, the terminal determines, according to the PDN connection that is established by itself and related to the APN with the SIPTO permission, the current transmission specific type. The PDN connection of the IP flow and determining the determined PDN connection is that the network side device does not need to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

In the second optimization mode, the second notification message is used to instruct the terminal to send, to the network side device, the information about the PDN connection that the network side device does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function.

In the second optimization mode, correspondingly, the step 12 is specifically: the terminal sends a third reply message to the network side device, and the network side device that is determined by the third reply message does not need to perform the SIPTO function. Initiating information about the PDN connection carrying the deactivation process with the reactivation request.

After receiving the first notification message or the second notification message of the network side device, the terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. . The notification message used by the network side device to notify the terminal to send to the network side device that the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when the SIPTO function is executed may be carried in the notification message. The parameter information of the APN of the PDN connection that performs the SIPTO process may also not carry the parameter information, that is, the parameter information of the APN used by the network side device to indicate the PDN connection that needs to perform the SIPTO process in the notification message used is optional. . Specifically, if the parameter information is carried, the first notification message is sent, and if the parameter is not carried, the information is the second notification message.

The first request message and the first reply message, the second request message and the second reply message, the first notification message, the second notification message and the third reply message are all new signaling messages.

The optimization methods of the mode A and the mode A are applicable to the application scenarios of the SIPTO above RAN and the SIPTO at the Local Network.

Mode B: If the terminal currently needs to transmit a specific type of IP flow and needs to establish a new PDN connection for transmission, then:

Step 11 includes: determining, by the terminal, the new PDN connection that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Correspondingly, the step 12 includes: the terminal sends a PDN connectivity request message to the network side device, and carries the PDN connection request message to indicate that the PDN connection requested by the terminal is the network side device performing the SIPTO function. It is not necessary to initiate an indication of a PDN connection carrying a deactivation procedure with a reactivation request.

In this mode, when the terminal needs to perform transmission of a specific type of IP stream, and the specific type of IP stream triggers the establishment of a new PDN connection, the terminal may notify the network side device by expanding the existing PDN connection request message. It is not necessary to initiate a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function.

In this manner, after the terminal sends the PDN connection request message to the network side device, the method further includes:

After receiving the PDN connectivity accept message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. The information about the new PDN connection, wherein the PDN connection accept message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Specifically, after receiving the PDN connection establishment request sent by the terminal, the network side device determines that a new PDN connection needs to be established, and the newly established PDN connection is that the network side device does not need to initiate the reactivation request when performing the SIPTO function. Deactivating a PDN connection of the process, the network side device storing, in the context of the newly established PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and The terminal returns a PDN connection accept message to confirm.

In an implementation, the network side device may also determine whether the PDN connection that the terminal requests to establish is related to the APN with the SIPTO permission, and carries the PDN connection accept message returned to the terminal to indicate whether to accept the terminal in the PDN connection request message. A message indicating the information to be carried.

Correspondingly, after the terminal receives the PDN connection accept message carrying the prompt information indicating that the receiving terminal carries the indication information in the PDN connection request message, the locally stored network side device does not need to initiate carrying the SIPTO function. Adding information of the newly established PDN connection to the PDN connection of the deactivation process of the activation request; after receiving the PDN connection accept message carrying the prompt information indicating the indication information carried in the PDN connection request message, the terminal receives the message The information indicating that the newly established PDN connection is a network side device does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function is not stored.

The mode B is applicable to the application scenarios of the SIPTO above RAN and the SIPTO at the Local Network.

Mode C: If the terminal currently needs to transmit a specific type of IP flow, and needs to establish a dedicated bearer to transmit in the established PDN connection of the terminal, then:

Step 11: the terminal determines that the locally stored network side device does not need to initiate the PDN connection of the dedicated bearer that does not need to be established when the PDN connection carrying the deactivation request is performed in the SIPTO function. The PDN connection corresponding to the dedicated bearer to be established is determined to be that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Correspondingly, the step 12 includes: the request bearer resource modification message sent by the terminal to the network side device carries the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, and the network side device performs the SIPTO function. It is not necessary to initiate an indication of a PDN connection carrying a deactivation procedure with a reactivation request.

In this manner, if the terminal determines that the locally stored network side device does not need to initiate a PDN connection that includes the dedicated bearer to be established, the PDN connection carrying the deactivation process with the reactivation request does not need to initiate the PTO connection. For the normal bearer resource modification process, refer to the 3GPP TS 23.401 protocol.

In this manner, the network side device that is locally stored by the terminal does not need to initiate the process of determining the PDN connection of the deactivation process that carries the reactivation request, and may be determined by using the foregoing manner A, or may be determined by using the foregoing manner B.

In this manner, when the terminal needs to perform transmission of a specific type of IP stream, and the specific type of IP stream triggers establishment of a dedicated bearer in the PDN connection established by the terminal, the terminal may modify the message by carrying the resource to the existing request. The extension is to notify the network side device that it is not required to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

In this manner, after the terminal sends the request bearer resource modification message to the network side device, the method further includes:

After receiving the bearer setup request message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when the SIPTO function is executed, and the corresponding dedicated bearer is added. A PDN connection, where the bearer setup request message carries prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message.

Specifically, after receiving the request bearer resource modification message sent by the terminal, the network side device stores, in the context of the PDN connection corresponding to the dedicated bearer that is to be established, is used to indicate that the PDN connection is not carried when the SIPTO is executed. The information about the deactivation process of the request is activated, and the bearer setup request message is returned to the terminal for confirmation, and the bearer setup request message carries the prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message.

In an implementation, the network side device may determine whether the PDN connection corresponding to the dedicated bearer to be established is related to the APN with the SIPTO permission, and carries the bearer setup request message returned to the terminal to indicate whether to accept The prompt information of the indication information carried by the terminal in the bearer setup request message.

Correspondingly, after the terminal receives the bearer setup request message that is used to indicate the prompt information of the indication information carried in the bearer setup request message, the locally stored network side device does not need to initiate the bearer when performing the SIPTO function. In the PDN connection of the deactivation process of the activation request, the PDN connection corresponding to the dedicated bearer is added; after receiving the bearer setup request message carrying the prompt information indicating the indication information carried in the bearer setup request message, the terminal does not The information indicating that the PDN connection corresponding to the dedicated bearer is a network side device does not need to initiate a PDN connection carrying the deactivation procedure of the reactivation request when performing the SIPTO function.

This mode C is only applicable to the application scenario of SIPTO above RAN.

Mode D: If the terminal currently needs to transmit a specific type of IP flow and can transmit using the established bearer of the established PDN connection of the terminal, then:

Step 11 includes: when determining, by the terminal, that the locally stored network side device performs the SIPTO function, the PDN connection that does not need to initiate the deactivation process carrying the reactivation request does not include the PDN connection used for transmitting the specific type of IP flow. Determining, by the network side device, the PDN connection used by the network side device to perform the SIPTO function does not need to initiate a deactivation process carrying the reactivation request;

Correspondingly, the step 12 includes: the terminal sending a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is a PDN connection used for transmitting a specific type of IP flow, and is carried for Indicates that the PDN connection that the terminal requests to establish is that the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Specifically, the terminal sets the APN parameter in the PDN connection request message to the APN of the PDN connection used for transmitting the specific type of IP flow, and sets the PDN type parameter in the PDN connection request message as the PDN type parameter. Transmitting the PDN type of the PDN connection used by the specific type of IP stream, and carrying the PDN connection used to indicate that the terminal is requested to be established in the PDN connection request message is not required to initiate the carrying of the SIPTO function. The indication of the PDN connection of the deactivation process of the request is activated.

In this mode, the network side device that is locally stored by the terminal does not need to initiate the process of determining the PDN connection of the deactivation process that carries the reactivation request, and may be determined by using the foregoing manner A or the foregoing manner A. It can be determined in the above manner B.

The terminal receives the PDN connection reject message returned by the network side device, and the locally stored network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and increases the specific type of IP transmission this time. The information of the PDN connection used by the flow, where the PDN connection reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

This mode D is applicable to the application scenarios of SIPTO above RAN and SIPTO at the Local Network. For the SIPTO above RAN scenario, the established bearer of the established PDN connection may be the PDN connection. The default bearer may also be a dedicated bearer of the PDN connection. For the SIPTO at the Local Network scenario, the established bearer of the established PDN connection is the default bearer of the PDN connection.

According to any of the foregoing manners B to D, if the PDN connection of the specific type of IP stream is transmitted after the transmission is completed, and the PDN connection does not transmit any specific type of IP stream, the method further includes:

For the PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any particular type of IP flow, the terminal notifies the network side device that, when performing the SIPTO function, the deactivation with the reactivation request can be initiated for the PDN connection. The process, and the locally stored network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, deleting the information of the PDN connection.

Further, for the foregoing PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any specific type of IP flow, the terminal specific processing includes the following methods:

1. The terminal initiates the release process of the PDN connection to the network side device.

In this manner, the end of the specific type of IP stream transmitted by the PDN connection causes the PDN connection to be disconnected, that is, the PDN connection does not transmit any type of IP stream after completing the transmission of the specific type of IP stream.

2. The terminal initiates a release process and a reconstruction process of the PDN connection to the network side device.

In this manner, the end of the specific type of IP stream transmitted by the PDN connection results in a re-establishment process of the PDN connection, that is, the PDN connection is still transmitting a specific type of IP when the transmission of the specific type of IP stream is completed. Other types of IP flows.

3. The terminal sends a request bearer resource modification message to the network side device, and the PDN connection corresponding to the bearer that is requested to be modified by the terminal when the network side device performs the SIPTO function may be carried in the request carrying resource modification message. Re-initiating the indication information of the requested deactivation process, and after receiving the Deactivate EPS Bearer Context Request message returned by the network side device, the locally stored network side device does not need to perform the SIPTO function. Deleting the information of the PDN connection in the PDN connection that carries the deactivation process with the reactivation request, where the deactivated EPS bearer context request message carries the indication information that is used to indicate that the receiving terminal carries the request bearer resource modification message. Prompt message.

In this manner, the end of the specific type of IP stream transmitted by the PDN connection causes deactivation of the dedicated bearer of the PDN connection. For example, the dedicated bearer only transmits the particular type of IP stream that is transmitted this time.

The terminal sends a request bearer resource modification message to the network side device, and the PDN connection corresponding to the bearer that is requested to be modified by the terminal when the SIPTO function is performed by the network side device can be carried in the request. The indication information of the deactivation process of the reactivation request, and after receiving the session management request (Session Management Request) message returned by the network side device, the locally stored network side device does not need to initiate carrying the reload when performing the SIPTO function. The information of the PDN connection is deleted in the PDN connection of the deactivation process of the activation request, where the session management request message carries the prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message.

In this manner, the end of the specific type of IP stream transmitted by the PDN connection causes a QoS change of the dedicated bearer of the PDN connection. For example, the terminal is using data carrying a video call application (ie, real-time IP stream) and data of a web browsing application (ie, a short-lived IP stream), and the video call application has higher requirements for QoS, and the web browsing application is The QoS requirement is low. The dedicated bearer needs to meet the QoS requirements of the two applications at the same time, that is, the dedicated bearer needs to meet at least the QoS required for the video call application. After the transmitted video call ends, the dedicated bearer is only used for transmission. The data of the web browsing can therefore reduce the QoS of the dedicated bearer.

The terminal sends a PDN connection request message to the network side device, and the PDN connection request message carries a PDN connection that is required to be established by the network side device to perform the SIPTO, and may initiate a reactivation request. The indication information of the deactivation process, and after receiving the PDN connection reject message returned by the network side device, the locally stored network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. Deleting the information of the PDN connection, the PDN connection reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

In this manner, the end of a particular type of IP stream transmitted by the PDN connection does not cause any change in the PDN connection.

It should be noted that after the network side device receives the release process of the PDN connection initiated by the terminal, or the release process and the reconstruction process of the PDN connection, the processing performed by the network side device is the same as the prior art. No longer.

Based on the same inventive concept, the embodiment of the present invention further provides a method for ensuring IP continuity on the network side. Referring to FIG. 2, the method includes:

Step 21: The network side device that the network side device acquires the terminal notification does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

Step 22: When performing SIPTO, the PDN connection related to the APN with the SIPTO permission and the SIPTO function is not required to initiate the deactivation process carrying the reactivation request, the network side device does not initiate the carrying of the reactivation request. Activation process.

Specifically, when the network side device (such as the MME) finds that SIPTO is being executed (the judgment process is the same as the existing process, specifically refer to the 3GPP TS 23.401 protocol), the network side device checks each PDN connection related to the APN in the context of the terminal. Context, according to whether the context of the PDN connection stores indication information indicating that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, the network side device performs different operations, as follows: If yes, the network side device does not initiate the deactivation process carrying the reactivation request for the PDN connection; if not, the network side device initiates the deactivation process carrying the reactivation request for the PDN connection (the same Existing operations).

Correspondingly, when the terminal receives the PDN disconnection request message carrying the re-excitation request (the existing message carrying the identifier of the default bearer and the re-establishment prompt information of the PDN connection), the terminal disconnects the PDN first, and then Re-establish the PDN connection (same operation).

In the embodiment of the present invention, the network side device that the network side device acquires the terminal notification does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and the APN with the SIPTO permission when the SIPTO function is executed. Relatedly, when performing the SIPTO function, it is not required to initiate a PDN connection carrying the deactivation procedure with the reactivation request, and the network side device does not initiate the deactivation process carrying the reactivation request, thereby ensuring long-lived IP flow (long-lived) Flows/real-time flows are transmitted to improve the user experience.

In the embodiment of the present invention, the network side device may be an MME, an SGSN, or the like, and may be other network side devices capable of performing SIPTO.

In the implementation, in step 21, the network side device that the network side device obtains the terminal notification does not need to initiate the PDN connection carrying the deactivation process with the reactivation request, including the following methods:

The network side device receives the first request message sent by the terminal, where the network side device determined by the mobile terminal device in the first request message does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. For related information, please refer to the above method A.

Preferably, after receiving the first request message sent by the terminal, the network side device may not need to initiate deactivation with the reactivation request for each network side device carried in the first request message when performing the SIPTO function. The PDN connection of the process, determining whether the PDN connection is associated with an APN having a SIPTO license;

If yes, the network side device stores, in the context of the PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returns a first reply message to the terminal. confirm;

If not, the network side device does not modify the context of the PDN connection, and returns a first reply message to the terminal, and the network side device carried in the first request message does not perform the SIPTO function in the first reply message. It is necessary to initiate information about a PDN connection that is unrelated to the APN with SIPTO grant determined in the PDN connection carrying the deactivation procedure with the reactivation request.

After the first request message sent by the terminal is received, the network side device further includes:

For each network side device carried in the first request message, the PDN connection carrying the deactivation process with the reactivation request does not need to be initiated when the SIPTO function is executed, and the network side device stores in the context of the locally stored PDN connection. It is used to indicate that the information carrying the deactivation process with the reactivation request is not initiated for the PDN connection when the SIPTO function is executed, and the first reply message is returned to the terminal for confirmation.

Preferably, the first reply message may carry the prompt information indicating that the updated network side device determined by the receiving terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, or may Do not bring any tips.

Based on any of the above embodiments, the method further includes:

The network side device receives the second request message sent by the terminal, where the updated network side device determined by the terminal in the second request message does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. Related Information;

To further improve the signaling overhead, further optimization of mode 1 includes the following two optimization methods:

As a first optimization method, in step 21, the network side device that the network side device obtains the terminal notification does not need to initiate the PDN connection carrying the deactivation process with the reactivation request, including:

When the network side device determines that the SIPTO function is performed, the first notification message is sent to the terminal, and the APN that needs to perform the SIPTO function is carried in the first notification message, to indicate that the terminal sends the first notification message to the network side device. The indicated APN is related and does not need to initiate related information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and receiving the third reply message returned by the terminal, where the third reply message carries the terminal determined by the terminal The network side device does not need to initiate information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

As a second optimization method, in step 21, the network side device that the network side device obtains the terminal notification does not need to initiate the PDN connection that carries the deactivation process with the reactivation request, including:

The network side device sends a second notification message to the terminal to instruct the terminal to send to the network side device that the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and the receiving terminal returns The third reply message, the network side device determined by the carrying terminal in the third reply message does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.

The mode 2, the network side device receives the PDN connection request message sent by the terminal, and the PDN connection request message carries a new PDN connection that is used to indicate that the terminal requests to establish the network side device, and does not need to initiate carrying the reactivation when performing the SIPTO function. For the indication information of the PDN connection of the requested deactivation process, refer to the above manner B.

In this manner, after receiving the PDN connection request message sent by the terminal, the network side device further includes:

The network side device determines that a new PDN connection needs to be established, and is stored in the context of the PDN connection requested by the PDN connection request message to indicate that the deactivation with the reactivation request is not initiated for the PDN connection when the SIPTO function is executed. The process information is returned to the terminal, and the PDN connection accept message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Preferably, after receiving the PDN connection request message sent by the terminal, the network side device may further determine whether the PDN connection requested by the PDN connection request message is related to the APN with the SIPTO permission;

If yes, the network side device stores, in the context of the PDN connection, that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returns a PDN connection accept message to the terminal, where the PDN connection is received. The acceptance message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message;

If not, the network side device returns a PDN connection accept message to the terminal, and the PDN connection accept message carries the prompt information indicating that the terminal rejects the indication information carried in the PDN connection request message.

The network side device receives the request bearer resource modification message sent by the terminal, where the request bearer resource modification message carries the PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal, and the network side device does not need to initiate when performing the SIPTO function. For the indication information of the PDN connection carrying the deactivation process of the reactivation request, refer to the above manner C.

In this manner, after the network side device receives the request bearer resource modification message sent by the terminal, the method further includes:

The network side device stores, in the context of the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed, and returns to the terminal. And a bearer setup request message, where the bearer setup request message carries prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message.

Preferably, after receiving the request bearer resource modification message sent by the terminal, the network side device may determine whether the network side device determined by the terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request and has SIPTO when performing the SIPTO function. Permitted APN related;

If yes, the network side device stores, in the context of the PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returns a bearer setup request message to the terminal. Acknowledgement, wherein the bearer setup request message carries prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message;

If not, the network side device returns a bearer setup request message to the terminal, where the bearer setup request message carries prompt information indicating that the terminal rejects the indication information carried in the bearer resource modification message.

Mode 4: The network side device receives the PDN connection request message sent by the terminal, and determines the PDN requested by the PDN connection request message when determining that the PDN connection requested by the PDN connection request message is a PDN connection established by the terminal. The connection is determined to be that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request, and the PDN connection request message carries the PDN connection that is required to be established by the terminal to be performed by the network side device. The SIPTO function does not need to initiate the indication of the PDN connection carrying the deactivation process with the reactivation request. For details, refer to the above mode D.

In an implementation, after the network side device receives the PDN connection request message sent by the terminal, and determines that the PDN connection that is requested by the PDN connection request message is a PDN connection established by the terminal, the method further includes:

The network side device stores, in the context of the PDN connection requested by the PDN connection request message, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returns to the terminal. The PDN connection reject message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Specifically, after receiving the PDN connection request message sent by the terminal, the network side device determines, according to the APN parameter and the PDN type parameter in the PDN connection request message, that the PDN connection requested by the PDN connection request message is the terminal has been established. The established PDN connection, according to the indication information carried in the PDN connection request message, determines that the PDN connection requested by the PDN connection request message is that the network side device does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function. The PDN connection. At this time, the network side device learns that the terminal sends the PDN connection request message to indicate that the network side device does not need to initiate a deactivation process carrying the reactivation request for the PDN connection when performing the SIPTO function. The network side device stores, in the context of the PDN connection requested by the locally stored PDN connection request message, information indicating that the deactivation process carrying the reactivation request does not need to be initiated when the SIPTO function is executed.

The method further includes: according to any one of the foregoing methods 2 to 4, the method further includes:

The network side device receives the PDN connection sent by the terminal and does not need to initiate the deactivation process carrying the reactivation request when the network side device determined by the terminal performs the SIPTO function, and may initiate the carrying of the reactivation request. After the notification of the deactivation process, in the context of the locally stored PDN connection, the stored PDN connection for indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is executed is deleted. Information.

Specifically, after receiving the request bearer resource modification message sent by the terminal, the network side device deletes the stored context for indicating that the SIPTO function is not implemented in the context of the PDN connection corresponding to the bearer modified by the locally stored terminal. The PDN connection initiates the information of the deactivation process carrying the reactivation request, and returns an deactivated EPS bearer context request message to the terminal, where the request bearer resource modification message is carried in the network device to indicate that the network side device is performing the SIPTO function. The PDN connection corresponding to the bearer that is requested to be modified by the terminal may initiate the indication information of the deactivation process that carries the reactivation request, where the deactivated EPS bearer context request message carries the information indicating that the receiving terminal carries in the request bearer resource modification message. a prompt message indicating the information;

or,

After receiving the request bearer resource modification message sent by the terminal, the network side device deletes the stored PDN in the context of the PDN connection corresponding to the bearer that the locally stored terminal requests to modify, and indicates that the PDN is not targeted when the SIPTO function is executed. The connection initiates the information of the deactivation process that carries the reactivation request, and returns a session management request message to the terminal, where the request bearer resource modification message is carried in the device to indicate that the network side device is performing the SIPTO function. The PDN connection corresponding to the bearer that is requested to be modified by the terminal may initiate the indication information of the deactivation process that carries the reactivation request, where the session management request message carries the indication information that is included in the requesting bearer resource modification message. Prompt information;

or,

The network side device receives the PDN connection request message sent by the terminal, and deletes the stored content in the context of the PDN connection requested by the locally stored terminal, indicating that the PDN connection is not carried and reactivated when the SIPTO function is executed. Deleting the information of the deactivation process, and returning a PDN connection reject message to the terminal, where the PDN connection request message carries a PDN connection that is required to be established for the network side device to perform the SIPTO function, and may be initiated and carried. The indication information of the deactivation process of the request is reactivated, and the PDN connection rejection message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

The interaction process between the terminal and the network side device (taking the MME as an example) in the method for ensuring IP continuity provided by the embodiment of the present invention is described in detail below with reference to the following embodiments.

Embodiment 1 This embodiment describes that, by using a new message, the UE and the MME maintain a PDN that does not need to initiate a deactivation process carrying a reactivation request when the network side device associated with the APN with SIPTO permission performs the SIPTO function. The method of connecting information.

Assuming that APN1 has a SIPTO grant, the UE establishes two PDN connections related to APN1, namely PDN connection 1 and PDN connection 2. The user is currently performing voice calls (ie, real-time IP flows), FTP downloads (ie, long-lived IP flows), and web browsing (ie, short-lived IP flows) applications, where voice call data is transmitted over PDN connection 1, FTP download And the data of the web browsing is transmitted through the PDN connection 2.

The interaction process between the UE and the MME in this embodiment is shown in FIG. 3, and includes:

Step 31: The UE sends a SIPTO request message to the MME, where the parameters of the SIPTO request message are the identifiers of the default bearers of the PDN connection 1 and the PDN connection 2.

Step 32: After the MME receives the SIPTO request message, since both the PDN connection 1 and the PDN connection 2 are related to the APN of the SIPTO executable, the request of the UE is valid, and the MME stores the same in the context of the PDN connection 1 and the PDN connection 2, respectively. It indicates that the information carrying the deactivation procedure with the reactivation request is not initiated for the PDN connection when the SIPTO is executed, and then the MME returns a SIPTO reply message to the UE.

After a period of time, the user's FTP download application is executed. Since the PDN connection 2 only transmits the data of the web browsing application, the PDN connection 2 is no longer the network side device does not need to initiate the reactivation request when performing the SIPTO function. The PDN connection of the activation process, the UE decides to update the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and when the SIPTO is executed, the PDN connection 2 is initiated to carry the reactivation request. The activation process, as shown in Figure 4, includes:

Step 41: The UE sends a SIPTO request message to the MME, where the parameter of the SIPTO request message is an identifier of a default bearer of the PDN connection 1.

Step 42: After receiving the SIPTO request message, the MME updates the context stored by itself and returns a SIPTO reply message to the UE.

In this step, the MME searches for the context of each PDN connection that the UE has established associated with the APN with SIPTO permission (the context of PDN connection 1 and PDN connection 2 in this embodiment), since the SIPTO request message only contains the PDN connection. 1 information, and the MME finds that the context of the PDN connection 1 has stored information indicating that the deactivation procedure carrying the reactivation request is not initiated for the PDN connection when the SIPTO is executed, the MME does not modify the context of the PDN connection 1. Since there is no information of the PDN connection 2 in the SIPTO request message, the MME finds that the context of the PDN connection 2 also stores information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO is executed, but The SIPTO request message does not include the information of the PDN connection 2, so the MME deletes from the context of the PDN connection 2 the information indicating that the deactivation procedure carrying the reactivation request is not initiated for the PDN connection when the SIPTO is executed.

Embodiment 2 This embodiment describes that, by modifying an existing message, the UE and the MME maintain a PDN that does not need to initiate a deactivation process carrying a reactivation request when the network side device associated with the APN with SIPTO permission performs the SIPTO function. The method of connecting information.

Assuming that APN1 has a SIPTO grant, the UE has not yet established a PDN connection associated with APN1. The user performs a web browsing application, and the operation triggers the UE to establish a PDN connection related to the APN1. The IP flow formed by the data of the web browsing application is a short-lived IP stream. Therefore, when the SIPTO is executed, the UE expects the MME to initiate the carrying of the PDN connection. Reactivate the requested deactivation process. The UE sends an existing PDN connection request message to the MME.

If the user performs a voice call application, because the voice call has a high QoS requirement, and the bearer for transmitting the webpage browsing data cannot meet the QoS requirement of the voice call, the UE decides to create a dedicated bearer for transmitting the data of the voice call application in the PDN connection. In addition, since the IP stream formed by the data of the voice call application is a real-time IP stream, the UE expects the MME not to initiate a deactivation process carrying the reactivation request for the PDN connection when performing the SIPTO function. When the UE sends the request bearer resource modification message to the MME, the request bearer resource modification message carries the deactivation process that carries the reactivation request without the PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal when the SIPTO function is executed. Prompt message. Correspondingly, after receiving the message, the MME stores, in the context of the corresponding PDN connection, indication information indicating that the deactivation procedure carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed.

If the user performs an FTP download application, the UE decides to transmit the data of the application by using the established bearer connected to the PDN connection associated with the APN1, and the IP flow formed by the FTP downloaded data is a long-lived IP flow, and the UE has The MME indicates that the deactivation process carrying the reactivation request is not required to be initiated for the PDN connection when the SIPTO function is executed, so the UE can directly send and receive data related to the FTP download application.

Further, the user does not perform the voice call application after performing the web browsing, but directly executes the FTP download application. Since the FTP download does not require high QoS, the bearer transmission of the data of the webpage browsing application can be directly used. FTP downloads the application's data, so there is no need to create a new dedicated bearer. However, the IP flow formed by the FTP downloaded data is a long-lived IP flow. Therefore, in order to indicate to the MME that the SIPTO function does not need to initiate a deactivation procedure carrying the re-activation request for the PDN connection, the UE sends a PDN connection request to the MME. The message, the APN parameter in the PDN connection request message is set to the APN of the PDN connection used to transmit the data of the FTP download application, and the PDN type parameter in the PDN connection request message is set to be used to transmit the data of the FTP download application. The PDN type of the PDN connection, and carrying the PDN connection used to indicate that the terminal is requested to establish, the network side device does not need to initiate the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

Correspondingly, after receiving the PDN connection request message, the MME carries the same PDN connection as the UE has established, and the PDN connection request message carries a PDN connection that is required to be established by the terminal. The network side device does not need to initiate the indication of the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function. The MME knows that the purpose of the UE sending the PDN connection request message is to indicate that the SIPTO function is not required to be performed. The PDN connection initiates a deactivation procedure carrying a reactivation request, and the MME stores, in the context of the corresponding PDN connection, indication information indicating that the deactivation procedure carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed. Then, the MME directly returns a PDN connection reject message to the UE for confirmation, and carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message in the PDN connection reject message.

Embodiment 3 This embodiment describes a process in which the MME performs SIPTO according to locally stored information based on the procedure shown in FIG. 4.

When the location of the UE changes, the MME discovers a PGW that is closer to the current location of the UE. Since the UE establishes a PDN connection associated with APN1 with SIPTO permission, the MME decides to perform SIPTO. According to the locally stored context of PDN connection 1 and PDN connection 2 associated with APN1, the MME knows that it is not necessary to initiate a deactivation procedure carrying a reactivation request for PDN connection 1, and may initiate a reactivation request for PDN connection 2 Activation process. Therefore, the MME initiates the process of deleting the PDN connection 2, and the MME carries the prompt information for re-activating the PDN connection in the deactivate bearer request message.

Embodiment 4 In this embodiment, it is assumed that APN1 has a SIPTO permission, and the PDN connection that the UE has established associated with APN1 is PDN connection 1 and PDN connection 2. The user is currently performing a voice call and web browsing application, wherein the data of the voice call is transmitted through the PDN connection 1, and the data of the web browsing is transmitted through the PDN connection 2. When the UE moves, the MME finds the PGW that is closer to the location of the UE. Since the APN1 has the SIPTO permission, the MME indicates to the UE that the SIPTO can be executed at this time. The specific process is as shown in FIG. 5, including:

Step 51: The MME sends a SIPTO notification message to the UE, where the parameter of the SIPTO notification message is APN1.

Step 52: The PDN connection that the UE has established related to APN1 includes a PDN connection 1 and a PDN connection 2, where the PDN connection 1 transmits data of a voice call, and the IP stream formed by the data is a real-time IP stream, so the UE wants the MME to When the SIPTO function is executed, the deactivation of carrying the reactivation request is not initiated for the PDN connection 1. Cheng. The UE returns a SIPTO reply message to the MME, where the parameter of the SIPTO reply message is the default bearer identifier of the PDN connection 1.

Correspondingly, the MME receives the SIPTO reply message, and according to the parameters in the SIPTO reply message, the UE expects that the MME does not initiate a deactivation procedure carrying the reactivation request for the PDN connection 1 when performing the SIPTO function; the MME is connected in the PDN 1 The information stored in the context indicates that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed. Therefore, the MME may initiate a deactivation procedure carrying a reactivation request for the PDN connection 2 (for details, please refer to 3GPP TS 23.401).

In the embodiment of the present invention, the UE and the MME maintain the PDN of the deactivation process carrying the reactivation request when performing the SIPTO function in the scenario of the SIPTO at the Local Network. The method of connecting information.

Assuming that APN1 has a SIPTO grant, the PDN connection that the UE has established associated with APN1 is PDN connection 1 and PDN connection 2. The user is currently performing a voice call and web browsing application, wherein the data of the voice call is transmitted through the PDN connection 1, and the data of the web browsing is transmitted through the PDN connection 2. When the UE moves, the MME finds that the Local Home Network ID of the UE changes (S-GW and L-GW setup scenario) or the L-GW address changes (L-GW and (H)eNB setup scenario), because the user The contract data indicates that the SIPTO at the Local Network function can be used for the APN1, so the MME indicates to the UE that the SIPTO can be executed at this time. The specific process is as shown in FIG. 6, including:

Step 61: The MME sends a SIPTO notification message to the UE, where the parameter of the SIPTO notification message is APN1.

Step 62: The UE receives the SIPTO notification message, and determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and returns a SIPTO reply message to the MME, and the parameters of the SIPTO reply message The determined network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request (such as the default bearer identifier of the PDN connection) when performing the SIPTO function, as follows:

The UE finds that the APN1 related PDN connection that it has established includes the PDN connection 1 and the PDN connection 2, wherein the PDN connection 1 transmits the data of the voice call, and the IP stream formed by the data is a real-time IP stream, so the UE wants the MME. When the SIPTO function is performed, the PDN connection carrying the deactivation procedure with the reactivation request is not initiated for the PDN connection 1. The parameter of the SIPTO reply message returned by the UE to the MME is the default bearer identifier of the PDN connection 1.

Correspondingly, the MME receives the SIPTO reply message, and according to the parameters of the SIPTO reply message, the UE expects that the MME does not initiate a deactivation procedure carrying the reactivation request for the PDN connection 1 when performing the SIPTO function; the MME is connected to the PDN 1 The context stores information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed. Therefore, the MME may initiate a deactivation procedure carrying a reactivation request for the PDN connection 2 (for details, please refer to 3GPP TS 23.401).

The above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, an embodiment of the present invention further provides a terminal. Referring to FIG. 7, the terminal includes:

The processing module 71 is configured to determine that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when performing the SIPTO function;

The notification module 72 is configured to notify the network side device of the PDN connection determined by the processing module 71.

The terminal provided by the embodiment of the present invention determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when performing the SIPTO function, and notifies the network side device of the determined PDN connection, so that the network side device When performing the SIPTO function, the network side device associated with the APN having the SIPTO license does not need to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function, and does not initiate the deactivation process carrying the reactivation request. In order to ensure the transmission of long-lived flows/real-time flows, the user's service experience is improved.

The information about the PDN connection involved in the embodiment of the present invention may be the identifier information of the default bearer of the PDN connection. Of course, it can also be other information for identifying the PDN connection.

In an implementation, as a first preferred implementation manner, the processing module 71 is specifically configured to: determine, from a PDN connection that is established by the terminal and related to the APN with the SIPTO permission, to currently transmit a PDN connection of a specific type of IP flow. And determining the determined PDN connection as the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The notification module 72 is specifically configured to: send a first request message to the network side device, and carry the deactivation process that carries the reactivation request when the network side device determined by the network side device determined by the first request message does not need to initiate the reactivation request. For information about the PDN connection, see Method A above.

Based on the foregoing first preferred implementation manner, the notification module 72 does not need to initiate a PDN connection notification of the deactivation process carrying the reactivation request to the network side device when the network side device determined by the processing module 71 performs the SIPTO function. Afterwards, the processing module 71 is further configured to: after receiving the first reply message returned by the network side device, the network side device determined by the storage itself does not need to initiate the PDN carrying the deactivation process with the reactivation request when performing the SIPTO function. Connected information.

Preferably, the processing module 71 is not related to the APN with SIPTO permission in the PDN connection that carries the deactivation process that carries the reactivation request when the network side device determined by the terminal is determined to perform the SIPTO function. After the first reply message of the related information of the PDN connection, the network side device determined by itself does not need to initiate the PDN connection carrying the deactivation process with the reactivation request in the execution of the SIPTO function, except as indicated in the first reply message. Other PDN connections other than the PDN connection, it is determined that the final network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and stores the final network side device does not need to perform the SIPTO function. Initiating information of a PDN connection carrying a deactivation process with a reactivation request; Otherwise, the processing module 71 stores information that all network side devices determined by itself do not need to initiate a PDN connection carrying the deactivation procedure of the reactivation request when performing the SIPTO function.

Based on any of the foregoing embodiments, the notification module 72 sends the PDN connection notification of the deactivation process carrying the reactivation request to the network side device when the network side device determined by the processing module 71 does not need to initiate the SIPTO function, and the processing module 71 The method is further configured to: after the determined network side device does not need to initiate a change of the PDN connection carrying the deactivation process with the reactivation request, after determining that the updated network side device does not need to perform the SIPTO function. Initiating a PDN connection carrying a deactivation process with a reactivation request; and, after receiving the second reply message returned by the network side device, updating the network side device stored by itself does not need to initiate carrying the reactivation request when performing the SIPTO function Information about the PDN connection of the deactivation process;

The notification module 72 is further configured to send a second request message to the network side device, where the updated network side device determined by the processing module 71 in the second request message does not need to initiate the carrying of the reactivation request when performing the SIPTO function. Information about the PDN connection of the deactivation process.

Preferably, the processing module 71 receives the APN with the SIPTO permission in the PDN connection that carries the deactivation process carrying the reactivation request when the network side device carrying the updated SIPT function is configured to perform the SIPTO function. After the second reply message of the related information of the unrelated PDN connection, the updated network side device determined by itself does not need to initiate the PDN connection carrying the deactivation process with the reactivation request in addition to the first execution of the SIPTO function. The other PDN connection except the PDN connection indicated in the second reply message is determined to be that the final network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and stores the determined final network side. The device does not need to initiate the information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; otherwise, the processing module 71 stores all the updated network side devices determined by itself to perform the SIPTO function without performing the carrying. There is information about the PDN connection of the deactivation process that reactivates the request.

As a further optimization of the first preferred implementation, the processing module 71 is specifically configured to: after receiving the first notification message sent by the network side device, is related to the APN that is established by the terminal and is carried in the first notification message. In the PDN connection, the PDN connection for transmitting a specific type of IP flow is determined. The first notification message carries the APN that needs to perform the SIPTO function, and determines the determined PDN connection as the network side device does not perform the SIPTO function. The PDN connection carrying the deactivation process with the reactivation request needs to be initiated; or, after receiving the second notification message sent by the network side device, determining from the PDN connection established by the terminal and related to the APN with SIPTO permission Currently, the PDN connection of the specific type of IP flow is transmitted, and the determined PDN connection is determined to be that the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. For details, refer to the foregoing manner A. Two optimization methods;

The notification module 72 is specifically configured to: send a third reply message to the network side device, and carry the self-determined network side device in the third reply message, and do not need to initiate the deactivation with the reactivation request when performing the SIPTO function. Information about the PDN connection of the live process.

The processing module 71 is specifically configured to: determine that the new PDN connection is that the network side device does not need to initiate a PDN connection that carries the deactivation process with the reactivation request when performing the SIPTO function;

The notification module 72 is specifically configured to: send a PDN connection request message to the network side device, and carry the PDN connection request message to indicate that the PDN connection requested by the terminal is a network side device, and does not need to initiate carrying when performing the SIPTO function. For the indication of re-activating the PDN connection of the requested deactivation process, refer to the above mode B.

Further, after the notification module 72 sends the PDN connection request message to the network side device, the processing module 71 is further configured to: after receiving the PDN connection accept message returned by the network side device, the locally stored network side device does not need to perform the SIPTO function. In the PDN connection that initiates the deactivation process with the reactivation request, the information about the new PDN connection is added, and the PDN connection accept message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Preferably, after the processing module 71 receives the PDN connection accept message carrying the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message, the locally stored network side device does not need to initiate carrying when performing the SIPTO function. In the PDN connection of the deactivation process with the reactivation request, the information of the new PDN connection is added; the processing module 71 receives the PDN connection accepting the prompt information carrying the indication information indicating the rejection of the terminal in the PDN connection request message. After the message, the information indicating that the new PDN connection is the network side device does not need to initiate the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function is not stored.

As a third preferred implementation manner, if the terminal currently needs to transmit a specific type of IP flow, and needs to establish a dedicated bearer to transmit in the established PDN connection of the terminal, then:

The processing module 71 is specifically configured to: when it is determined that the locally stored network side device does not need to initiate the PDN connection corresponding to the dedicated bearer that is required to be established, and does not need to initiate the deactivation process that carries the reactivation request, Determining the PDN connection corresponding to the dedicated bearer to be established as the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, as described in the above manner C;

The notification module 72 is specifically configured to: when the request bearer resource modification message sent to the network side device carries the PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal, the network side device does not need to initiate the carryover when performing the SIPTO function. For the indication information of the PDN connection of the deactivation process of the activation request, refer to the above manner C.

Further, after the notification module 72 sends the request bearer resource modification message to the network side device, the processing module 71 is further configured to: after receiving the bearer setup request message returned by the network side device, the locally stored network side device is performing the SIPTO function. When the PDN connection carrying the deactivation process with the reactivation request is not required to be initiated, the information about the PDN connection corresponding to the dedicated bearer is added, where the bearer setup request message is carried in the bearer to indicate that the accepting terminal is The request information of the indication information carried in the resource modification message is requested.

Preferably, after the processing module 71 receives the bearer setup request message that is used to indicate the prompt information of the indication information carried in the request bearer resource modification message, the locally stored network side device does not need to initiate the SIPTO function. The PDN connection of the deactivation process carrying the reactivation request is added to the PDN connection corresponding to the dedicated bearer; the processing module 71 receives the bearer carrying the prompt information for indicating the indication information carried in the request bearer resource modification message. After the request message is established, the PDN connection indicating that the dedicated bearer corresponds to the PDN connection that the network side device does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function is not stored.

As a fourth preferred implementation, if the terminal currently needs to transmit a specific type of IP flow and can transmit using the established bearer of the established PDN connection of the terminal, then:

The processing module 71 is specifically configured to: when determining that the locally stored network side device performs the SIPTO function, does not need to initiate the PDN connection of the deactivation process carrying the reactivation request, and does not include the PDN connection used for transmitting the specific type of IP flow. When the PDN connection used for transmitting the specific type of IP flow is determined, the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. For details, refer to the foregoing mode D;

The notification module 72 is specifically configured to send a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is a PDN connection used for transmitting a specific type of IP flow, and is carried to represent the terminal. The PDN connection that is requested to be established is that the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. For details, refer to the foregoing manner D.

Further, after the notification module 72 sends the request bearer resource modification message to the network side device, the processing module 71 is further configured to: after receiving the PDN connection reject message returned by the network side device, when the locally stored network side device performs the SIPTO function In the PDN connection that does not need to initiate the deactivation process with the reactivation request, the information of the PDN connection used for transmitting the specific type of IP flow is increased, wherein the PDN connection reject message is carried in the PDN to indicate that the receiving terminal is in the PDN. The prompt information of the indication information carried in the connection request message.

Based on any of the foregoing third to fifth preferred implementation manners, the network side device determined by the processing module 71 does not need to initiate the PDN connection of the deactivation process carrying the reactivation request when the SIPTO function is executed. For the transmission of a specific type of IP flow and no longer transmitting any particular type of IP flow, then:

The processing module 71 is further configured to: for the foregoing PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any specific type of IP flow, the locally stored network side device does not need to initiate carrying a reload when performing the SIPTO function. In the PDN connection of the activation request deactivation process, delete the information of the PDN connection; and,

The notification module 72 is further configured to: for the foregoing PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any specific type of IP flow, notify the network side device that the PDN connection may be initiated and carried when the SIPTO function is performed. Reactivate the requested deactivation process.

In an implementation, for the above-mentioned PDN connection that has completed the transmission of a particular type of IP flow and no longer transmits any particular type of IP flow:

The notification module 72 is specifically configured to initiate a release process of the PDN connection to the network side device.

or,

The notification module 72 is specifically configured to initiate a release process and a re-establishment process of the PDN connection to the network side device.

or,

The notification module 72 is specifically configured to send a request bearer resource modification message to the network side device, and carry the PDN connection corresponding to the bearer that is requested to be modified by the network side device when the SIPTO function is executed by the network side device. Initiating the indication information of the deactivation process carrying the reactivation request; and the processing module 71 is specifically configured to: after receiving the deactivated EPS bearer context request message or the session management request message returned by the network side device, the locally stored network side device When the SIPTO function is executed, it is not required to initiate the deletion of the PDN connection information in the PDN connection carrying the deactivation procedure with the reactivation request, and the deactivated EPS bearer context request message or the session management request message is carried in the request to indicate that the receiving terminal is in the request The prompt information of the indication information carried in the resource modification message;

or,

The notification module 72 is specifically configured to send a PDN connection request message to the network side device, and carry the PDN connection request message in the PDN connection request message to indicate that the PDN connection requested by the network side device for the terminal is initiated and carried. The indication information of the deactivation process of the activation request is activated; and the processing module 71 is specifically configured to: after receiving the PDN connection rejection message returned by the network side device, the locally stored network side device does not need to initiate carrying the reactivation when performing the SIPTO function. The information of the PDN connection is deleted in the PDN connection of the requested deactivation process, and the PDN connection reject message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Based on the same inventive concept, the embodiment of the present invention further provides a network side device. As shown in FIG. 8, the network side device includes:

The processing module 81 is configured to acquire, by the network side device notified by the terminal, the PDN connection that carries the deactivation process carrying the reactivation request when performing the SIPTO function;

The SIPTO execution module 82 is configured to: when performing the SIPTO function, does not need to initiate a PDN connection carrying the deactivation process carrying the reactivation request when the SIPTO function is performed, and does not initiate carrying the reactivation request. Deactivation process.

The network side device provided by the embodiment of the present invention does not need to initiate a PDN connection carrying a deactivation process with a reactivation request when performing the SIPTO function; and when performing SIPTO, for the SIPTO permission APN-related and no need to initiate a PDN connection carrying a deactivation procedure with a reactivation request, does not initiate a deactivation process carrying a reactivation request, thereby ensuring long-lived IP flows (long-lived) Flows/real-time flows are transmitted to improve the user experience.

In an implementation, the processing module 81 is specifically configured to:

The first request message sent by the terminal is received, and the network side device that is determined by the terminal in the first request message does not need to initiate the PDN connection information of the deactivation process that carries the reactivation request when performing the SIPTO function. Mode 1; or,

When it is determined that the SIPTO function is performed, the first notification message is sent to the terminal, and the APN that needs to perform the SIPTO function is carried in the first notification message to instruct the terminal to send the APN indicated in the first notification message to the network side device. Relevant and related information of the PDN connection carrying the deactivation process with the reactivation request is not required when performing the SIPTO function; and receiving the first request message returned by the terminal, where the first request message carries the network side device determined by the terminal The information about the PDN connection carrying the deactivation process with the reactivation request is not required to be performed when performing the SIPTO function. For details, refer to the first optimization mode of the foregoing mode 1; or

Sending a second notification message to the terminal, to instruct the terminal to send, to the network side device, information about the PDN connection that the network side device does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function; and the third returned by the receiving terminal a reply message, the network side device that is determined by the terminal in the third reply message does not need to initiate the PDN connection information of the deactivation process that carries the reactivation request when performing the SIPTO function. For details, refer to the second method in the foregoing manner 1. Optimization method; or,

Receiving a PDN connection request message sent by the terminal, where the PDN connection request message carries a new PDN connection for indicating that the terminal requests to establish that the network side device does not need to initiate a deactivation process carrying the reactivation request when performing the SIPTO function. For details about the PDN connection, see Method 2 above; or,

Receiving a request bearer resource modification message sent by the terminal, where the request bearer resource modification message carries a PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal, and the network side device does not need to initiate the reactivation request when performing the SIPTO function. For the indication of the PDN connection of the deactivation process, refer to the above manner 3; or

Receiving a PDN connection request message sent by the terminal, and determining that the PDN connection established by the PDN connection request message is a PDN connection established by the terminal, the PDN connection requested by the PDN connection request message is determined as a network side device. The PDN connection carrying the deactivation process with the reactivation request is not required to be performed, and the PDN connection request message carries the PDN connection that is required to be established by the terminal to be a network side device, and does not need to perform the SIPTO function. The indication information of the PDN connection carrying the deactivation process with the reactivation request is initiated. For details, refer to the foregoing manner 4.

In an implementation, the processing module 81 is further configured to:

After receiving the first request message sent by the terminal, each network side device carried in the first request message does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. The stored information of the PDN connection is stored to indicate that the information about the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO is executed, and the first reply message is returned to the terminal for confirmation; or

After receiving the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the terminal, storing, in the context of performing the SIPTO function, not starting the deactivation process carrying the reactivation request for the PDN connection. And returning a PDN connection accept message to the terminal, where the PDN connection accept message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message; or

After receiving the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, the storage is used to indicate that the reactivation request is not carried for the PDN connection when the SIPTO function is executed. The information of the deactivation process is returned to the terminal, and the bearer setup request message is sent to the terminal, where the bearer setup request message carries the prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message; or

After receiving the PDN connection request message sent by the terminal and determining that the PDN connection requested by the PDN connection request message is a PDN connection established by the terminal, the PDN connection request is established in the context of the PDN connection requested by the PDN connection request message. When the SIPTO function is executed, the information about the deactivation process carrying the reactivation request is not sent for the PDN connection, and the PDN connection reject message is returned to the terminal, where the PDN connection reject message is carried in the receiving terminal to indicate that the receiving terminal is The prompt information of the indication information carried in the PDN connection request message.

Preferably, after receiving the first request message sent by the terminal, the processing module 81 does not need to initiate the deactivation process carrying the reactivation request for each network side device carried in the first request message when performing the SIPTO function. a PDN connection, determining whether the PDN connection is associated with an APN having a SIPTO grant; if so, the processing module 81 is stored in the context of the PDN connection to indicate that the reactivation request is not carried for the PDN connection when performing the SIPTO Deactivating the information of the process, and returning the first reply message to the terminal for confirmation; if not, the processing module 81 does not modify the context of the PDN connection, returns a first reply message to the terminal, and in the first reply message The network side device carrying the first request message does not need to initiate the information related to the PDN connection that is not related to the APN with the SIPTO permission determined in the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function. .

Preferably, after receiving the PDN connection request message sent by the terminal, the processing module 81 determines whether the PDN connection requested by the PDN connection request message is related to the APN with the SIPTO permission; if so, the processing module 81 is connected to the PDN. Storing, in the context, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing SIPTO, and returning a PDN connection accept message to the terminal for confirmation, The PDN connection accept message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message; if not, the processing module 81 returns a PDN connection accept message to the terminal, where the PDN connection accept message is carried in the The prompt information of the indication information carried by the terminal in the PDN connection request message is rejected.

Preferably, after receiving the request bearer resource modification message sent by the terminal, the processing module 81 can determine whether the network side device determined by the terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request and has SIPTO when performing the SIPTO function. The APN of the license is related; if yes, the processing module 81 stores, in the context of the PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO is executed, and returns the bearer to the terminal. Establishing a request message for confirming, the bearer setup request message carries prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message; if not, the processing module 81 returns a bearer setup request message to the terminal, where the bearer is established. The request message carries prompt information indicating that the terminal rejects the indication information carried in the request bearer resource modification message.

Based on any of the foregoing embodiments, the processing module 81 is further configured to: receive a second request message sent by the terminal, where the updated network side device determined by the carrying terminal in the second request message does not need to initiate when performing the SIPTO function. Corresponding information of the PDN connection carrying the deactivation process of the reactivation request; and, according to the updated network side device carried in the second request message, does not need to initiate a deactivation process carrying the reactivation request when performing the SIPTO function Related information of the PDN connection, updating the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and returns a second reply message to the terminal for confirmation.

Based on any of the foregoing embodiments, the processing module 81 is further configured to: when receiving the SIPTO function sent by the terminal, the network side device determined for the terminal does not need to initiate the deactivation with the reactivation request when performing the SIPTO function. After the PDN connection of the process can initiate the notification of the PDN connection carrying the deactivation process with the reactivation request, in the context of the locally stored PDN connection, the deleted stored one is used to indicate that the SIPTO function is not implemented for the The PDN connection initiates the information carrying the deactivation process with the reactivation request.

Further, the processing module 81 is specifically configured to:

After receiving the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the bearer that is requested by the locally stored terminal, the deleted stored identifier is used to indicate that the PDN connection is not carried when the SIPTO function is executed. The information of the deactivation process of the reactivation request is returned, and the deactivated EPS bearer context request message is returned to the terminal, where the request bearer resource modification message carries a request for indicating that the network side device requests the modification for the terminal when performing the SIPTO function. The bearer corresponding to the PDN connection may initiate the indication information of the deactivation process carrying the reactivation request, and the deactivated EPS bearer context request message carries a prompt for indicating that the receiving terminal carries the indication information carried in the bearer resource modification message. Information; or,

After receiving the request bearer resource modification message sent by the terminal, deleting, in the context of the PDN connection requested by the locally stored terminal, the stored one is used to indicate that the PDN connection is not carried when the SIPTO function is executed. Retrieving the information of the deactivation process of the request, and returning a session management request message to the terminal, where the request bearer resource modification message carries a bearer corresponding to the bearer requested to be modified by the network side device when performing the SIPTO function. The PDN connection may initiate the indication information of the deactivation process carrying the reactivation request, where the session management request message carries the prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; or

Receiving the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the locally stored terminal, deleting the stored indication for not carrying the reactivation request for the PDN connection when performing the SIPTO function Activating the process information, and returning a PDN connection reject message to the terminal, where the PDN connection request message carries a PDN connection for indicating that the network side device requests the establishment of the SIPTO function to initiate the carrying of the reactivation request The indication information of the deactivation process, the PDN connection rejection message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

The structure and processing manner of the terminal provided by the embodiment of the present invention are described below in conjunction with the preferred hardware structure. Referring to Figure 9, the terminal includes a transceiver 91, at least one processor 92 coupled to the transceiver 91, and a memory 93 coupled to the transceiver 91 and the processor 92, respectively, wherein the processor 92 is The configuration is used to determine that the network side device does not need to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function; the transceiver 91 is configured to notify the network side device of the PDN connection determined by the processor 92. .

In an implementation, as a first preferred implementation manner, the processor 92 is configured to: determine, from a PDN connection that is established by the terminal and associated with the APN with SIPTO permission, that the specific type of IP stream is currently transmitted. PDN connection, and the determined PDN connection is determined as the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, as described in the above manner A;

The transceiver 91 is configured to: send the first request message to the network side device, and carry the information related to the PDN connection determined by the processor 92 in the first request message. For details, refer to the foregoing manner A.

Based on any of the above embodiments, further, the transceiver 91 is further configured to receive the first reply message returned by the network side device; the processor 92 is further configured to store the network side device determined by the memory 93 to perform The SIPTO function does not need to initiate the information of the PDN connection carrying the deactivation procedure with the reactivation request.

Based on any of the above embodiments, further, after the transceiver 91 notifies the network side device of the PDN connection determined by the processor 92, the processor 92 is further configured to: when the determined network side device is performing the SIPTO function After the PDN connection of the deactivation process carrying the reactivation request does not need to be initiated, it is determined that the updated network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; After receiving the second reply message returned by the network side device, the network side device stored in the update memory 93 does not need to initiate the information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The transceiver 91 is further configured to: send a second request message to the network side device, and in the second request message The updated network side device determined by the medium carrying processor 92 does not need to initiate information about the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.

As a further optimization of the first preferred implementation, the processor 92 is specifically configured to: after receiving the first notification message sent by the network side device, is related to the APN that is established by the terminal and is carried in the first notification message. In the PDN connection, the PDN connection that currently transmits a specific type of IP flow is determined, and the first notification message carries the APN that needs to perform the SIPTO function; or, after receiving the second notification message sent by the network side device, the slave terminal has The PDN connection that is established and associated with the APN with the SIPTO permission determines the PDN connection for the current type of IP flow. For details, refer to the two optimization modes of the foregoing mode A.

The transceiver 91 is configured to: send a third reply message to the network side device, and carry the self-determined network side device in the third reply message, and do not need to initiate the carrying of the reactivation request when performing the SIPTO function. For details about the PDN connection of the deactivation process, refer to the two optimization methods of the above mode A.

The processor 92 is configured to: determine the new PDN connection as a network side device does not need to initiate a PDN connection carrying a deactivation request with a reactivation request when performing the SIPTO function, as described in the foregoing manner B;

The transceiver 91 is configured to: send a PDN connection request message to the network side device, and carry the PDN connection requesting to establish the PDN connection requested by the terminal as a network side device, and do not need to perform the SIPTO function in the PDN connection request message. The indication information of the PDN connection carrying the deactivation process with the reactivation request is initiated. For details, refer to the foregoing mode B.

Further, after the transceiver 91 sends the PDN connection request message to the network side device, the transceiver 91 is further configured to: receive the PDN connection accept message returned by the network side device; the processor 92 is further configured to be used on the network side stored in the memory 93. The device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request to perform the SIPTO function, and the information about the new PDN connection is added, and the PDN connection accept message carries the message indicating that the accepting terminal is in the PDN connection request message. A message indicating the information to be carried.

The processor 92 is configured to specifically not need to initiate a PDN corresponding to the dedicated bearer that needs to be established in the PDN connection that the network side device stored in the memory 93 does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function. When the connection is performed, the PDN connection corresponding to the dedicated bearer that needs to be established is determined as the PDN connection of the network side device that does not need to initiate the deactivation process with the reactivation request when performing the SIPTO function. For details, refer to the foregoing mode C;

The transceiver 91 is configured to carry the PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal to be in the request bearer resource modification message sent to the network side device, and the network side device does not perform the SIPTO function. The indication information of the PDN connection carrying the deactivation process with the reactivation request needs to be initiated. For details, refer to the above manner C.

Further, after transmitting the request bearer resource modification message to the network side device, the transceiver 91 is further configured to: receive the bearer setup request message returned by the network side device; the processor 92 is further configured to: store in the memory 93 The network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request, and the information about the PDN connection corresponding to the dedicated bearer is added, and the bearer setup request message is carried in the bearer setup request message. The request information of the indication information carried in the resource modification message is requested.

As a fourth preferred implementation, if the terminal currently needs to transmit a specific type of IP flow and can transmit using the established PDN connection of the terminal, then:

The processor 92 is configured to: in the PDN connection that the network side device stored in the determining memory 93 does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function, does not include the specific type of IP flow of the current transmission. When the PDN connection is used, the PDN connection used for transmitting the specific type of IP stream is determined as the PDN connection of the network side device that does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function. Mode D;

The transceiver 91 is configured to: send a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is a PDN connection used for transmitting a specific type of IP flow, and carries The indication that the PDN connection that the terminal requests to establish is that the network side device does not need to initiate the PDN connection that carries the deactivation process with the reactivation request when performing the SIPTO function, as described in the foregoing manner D.

Further, after transmitting the request bearer resource modification message to the network side device, the transceiver 91 is further configured to: receive the PDN connection reject message returned by the network side device; the processor 92 is further configured to: store in the memory 93 The network side device does not need to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function, and increases the information of the PDN connection used for transmitting the specific type of IP flow, wherein the PDN connection reject message The prompt information indicating the receiving terminal carries the indication information carried in the PDN connection request message.

Based on any of the foregoing third to fifth preferred implementation manners, the network side device determined by the processor 92 does not need to initiate the PDN connection of the deactivation process carrying the reactivation request when the SIPTO function is executed. For the transmission of a specific type of IP flow and no longer transmitting any particular type of IP flow, then:

The processor 92 is also configured to: for the above-described PDN connection that has completed the transmission of a particular type of IP stream and no longer transmits any particular type of IP flow, the network side device stored in the memory 93 does not need to perform the SIPTO function Deleting the PDN connection carrying the deactivation process with the reactivation request, deleting the information of the PDN connection; and,

The transceiver 91 is further configured to: for the above-mentioned PDN connection that has completed transmission of a specific type of IP stream and no longer transmits any specific type of IP flow, notifying the network side device that the PDN connection may be performed for the PDN connection when performing the SIPTO function Initiate a deactivation process with a reactivation request.

The transceiver 91 is configured to initiate a release process of the PDN connection to the network side device; or

The transceiver 91 is configured to initiate a release process and a re-establishment process of the PDN connection to the network side device; or

The transceiver 91 is configured to send a request bearer resource modification message to the network side device, and the bearer resource modification message carries a bearer corresponding to the bearer requested by the network side device when the SIPTO function is executed. The PDN connection may initiate indication information carrying the deactivation procedure with the reactivation request, and receive the deactivated EPS bearer context request message or session management request message returned by the network side device; the processor 92 is configured to be specifically stored in the memory 93. The network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request to delete the information of the PDN connection when performing the SIPTO function, where the deactivated EPS bearer context request message or the session management request message is carried in the The prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; or

The transceiver 91 is configured to send a PDN connection request message to the network side device, and is carried in the PDN connection request message to indicate that the network side device can initiate retransmission for the PDN connection when performing the SIPTO function. The indication information of the requested deactivation process, and the PDN connection reject message returned by the receiving network side device; the processor 92 is configured to be used by the network side device stored in the memory 93 to perform carrying the SIPTO function without initiating carrying the reactivation Deleting the information of the PDN connection in the PDN connection of the requested deactivation process, wherein the PDN connection requested by the PDN connection request message is the transmission of the completed specific type of IP stream and no longer transmitting any specific type of IP A PDN connection of the flow, where the PDN connection reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

The structure and processing manner of the network side device provided by the embodiment of the present invention are described below in conjunction with the preferred hardware structure. Referring to Figure 10, the network side device includes a transceiver 101, at least one processor 102 coupled to the transceiver 101, and a memory 103 coupled to the transceiver 101 and the processor 102, respectively, wherein:

The processor 102 is configured to: acquire, by the network side device notified by the terminal, that the PDN connection carrying the deactivation process with the reactivation request is not required when performing the SIPTO function; and, when performing the SIPTO, for the APN with the SIPTO permission Corresponding and when performing the SIPTO function, it is not necessary to initiate a PDN connection carrying the deactivation procedure with the reactivation request, and does not initiate the deactivation process carrying the reactivation request.

In implementation, the transceiver 101 is configured to:

When the processor 102 determines to perform the SIPTO function, the first notification message is sent to the terminal, and the first notification is cancelled. The APN carrying the SIPTO function is required to indicate that the terminal sends the PDN related to the APN indicated in the first notification message to the network side device and does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function. Corresponding information of the connection; and a third reply message returned by the receiving terminal, where the network side device determined by the terminal carrying the third reply message does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function For related information, refer to the first optimization method of the above mode 1; or

In implementation, processor 102 is also configured to:

After the transceiver 101 receives the first request message sent by the terminal, each network side device carried in the first request message does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. And storing, in the context of the PDN connection stored in the memory 103, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO is executed, and returning the first reply message to the terminal. Confirm; or,

After the transceiver 101 receives the PDN connection request message sent by the terminal, it is stored in the memory 103. In the context of the PDN connection requested by the terminal, storing information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returning a PDN connection accept message to the terminal, the PDN The connection accept message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message; or

After receiving the request bearer resource modification message sent by the terminal, the transceiver 101 stores, in the context of the PDN connection corresponding to the dedicated bearer that is requested by the terminal stored in the memory 103, to indicate that the SIPTO function is not The PDN connection initiates the information of the deactivation process that carries the reactivation request, and returns a bearer setup request message to the terminal, where the bearer setup request message carries a prompt for indicating that the accepting terminal carries the indication information carried in the bearer resource modification message. Information; or,

After the transceiver 101 receives the PDN connection request message sent by the terminal and determines that the PDN connection requested by the PDN connection request message is the PDN connection established by the terminal, the PDN connection request message stored in the memory 103 is requested by the PDN connection request message. And storing, in the context of the established PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returning a PDN connection reject message to the terminal, where the PDN connection is rejected The message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Further, the transceiver 101 is further configured to: receive a second request message sent by the terminal, where the updated network side device determined by the carrying terminal in the second request message does not need to initiate carrying a reactivation when performing the SIPTO function. Information about the PDN connection of the requested deactivation process;

The processor 102 is further configured to update the memory according to the updated information of the PDN connection carrying the deactivation process with the reactivation request when the updated network side device carried in the second request message does not need to initiate the SIPTO function. The network side device stored in 103 does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function.

Based on any of the above embodiments, the transceiver 101 is further configured to: the network side device determined by the receiving terminal and determined by the terminal for performing the SIPTO does not need to initiate the deactivation with the reactivation request when performing the SIPTO function. The PDN connection of the process may initiate a notification of the deactivation process carrying the reactivation request; the processor 102 is further configured to: in the context of the PDN connection stored by the memory 103, delete the stored representation for execution The SIPTO function does not initiate information for the deactivation process carrying the reactivation request for the PDN connection.

Further, the processor 102 is configured to:

After the transceiver 101 receives the request bearer resource modification message sent by the terminal, in the context of the PDN connection requested by the terminal stored in the memory 103, the stored information is deleted to indicate that the PDN connection is not performed when the SIPTO is executed. Initiating information of the deactivation process carrying the reactivation request, where the request bearer resource modification message carries a bearer corresponding to the bearer requested to be modified by the network side device when performing the SIPTO function. The PDN connection may initiate the indication information of the deactivation process carrying the reactivation request, where the EPS bearer context request message carries the prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; or

After the transceiver 101 receives the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the bearer requested by the terminal stored in the memory 103, the stored information is deleted to indicate that the SIPTO function is not performed. Initiating the information about the deactivation process that carries the reactivation request for the PDN connection, and returning the session management request message to the terminal, where the request bearer resource modification message is carried in the device to indicate that the network side device is configured to perform the SIPTO function. The PDN connection corresponding to the bearer that the terminal requests to modify may initiate the indication information of the deactivation process that carries the reactivation request, where the session management request message carries a prompt for indicating that the receiving terminal carries the indication information carried in the bearer resource modification message. Information; or,

Receiving, by the transceiver 101, the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the terminal stored in the memory 103, deleting the stored information indicating that the PDN connection is not initiated when the SIPTO function is executed. Carrying the information of the deactivation process of the reactivation request, and returning a PDN connection reject message to the terminal, where the PDN connection request message carries a PDN connection for indicating that the network side device requests the terminal to perform the SIPTO function. The indication information of the deactivation process carrying the reactivation request may be initiated, and the PDN connection rejection message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A method for guaranteeing the continuity of Internet Protocol IP, characterized in that the method comprises:

The terminal determines that the network side device does not need to initiate a packet data network PDN connection carrying the deactivation process of the reactivation request when performing the selective Internet protocol traffic offload SIPTO function;

The terminal notifies the determined PDN connection to the network side device.
The method of claim 1 wherein

The terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, including: the PDN associated with the access point name APN that the terminal has established and has the SIPTO permission. In the connection, determining that the PDN connection of the specific type of IP flow is currently transmitted, and determining the determined PDN connection is that the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The terminal notifying the determined PDN connection to the network side device, the method includes: the terminal sending a first request message to the network side device, and carrying the network side device determined by the terminal in the first request message It is not necessary to initiate information about a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function.
The method according to claim 2, wherein after the terminal sends the first request message to the network side device, the method further includes:

After the terminal receives the first reply message returned by the network side device, the network side device determined by the storage itself does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.
The method of claim 3, wherein after the terminal notifies the network side device of the determined PDN connection, the method further includes:

After the determined network side device does not need to initiate a change of the PDN connection carrying the deactivation process with the reactivation request, the terminal determines that the updated network side device does not need to initiate when performing the SIPTO function. a PDN connection carrying a deactivation process with a reactivation request;

The terminal sends a second request message to the network side device, and the updated network side device does not need to initiate a PDN carrying a deactivation process with a reactivation request when performing the SIPTO function in the second request message. Information about the connection; and,

After receiving the second reply message returned by the network side device, the terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.
The method of claim 1 wherein

The terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when the SIPTO function is performed, and the method includes: after receiving the first notification message sent by the network side device, the terminal The PDN connection that has been established and associated with the APN carried in the first notification message determines the current transmission Transmitting a PDN connection of a specific type of IP flow, and determining the determined PDN connection as a network side device does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function, in the first notification message Carrying the APN that needs to perform the SIPTO function; or, after receiving the second notification message sent by the network side device, the terminal determines the current transmission from the PDN connection that has been established and associated with the APN with SIPTO permission. Determining the PDN connection of the specific type of IP flow, and determining the determined PDN connection as the network side device does not need to initiate the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function;

The terminal notifying the determined PDN connection to the network side device, the method includes: the terminal sending a third reply message to the network side device, and carrying the network side device determined by the terminal in the third reply message It is not necessary to initiate information about a PDN connection carrying a deactivation procedure with a reactivation request when performing the SIPTO function.
The method according to claim 1, wherein if the terminal currently needs to transmit a specific type of IP stream and needs to establish a new PDN connection for transmission, then:

The terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when performing the SIPTO function, and the method includes: determining, by the terminal, the new PDN connection that the network side device does not need to perform the SIPTO function. Initiating a PDN connection carrying a deactivation procedure with a reactivation request;

The terminal notifying the determined PDN connection to the network side device, the method includes: the terminal sending a PDN connection request message to the network side device, and carrying, in the PDN connection request message, a request to indicate that the terminal requests The established PDN connection is that the network side device does not need to initiate the indication of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.
The method according to claim 6, wherein after the terminal sends a PDN connection request message to the network side device, the method further includes:

After the terminal receives the PDN connection accept message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. The information about the new PDN connection, where the PDN connection accept message carries prompt information indicating that the indication information carried by the terminal in the PDN connection request message is accepted.
The method according to any one of claims 1 to 7, wherein if the terminal currently needs to transmit a specific type of IP stream, and a dedicated bearer needs to be established in the PDN connection established by the terminal to transmit:

The terminal determines that the network side device does not need to initiate a PDN connection carrying the deactivation process of the reactivation request when performing the SIPTO function, and the method includes: the terminal does not need to determine that the locally stored network side device performs the SIPTO function. When the PDN connection that initiates the deactivation process with the reactivation request does not include the PDN connection corresponding to the dedicated bearer to be established, the PDN connection corresponding to the dedicated bearer to be established is determined as the network side device does not perform the SIPTO function. A PDN connection carrying a deactivation procedure with a reactivation request needs to be initiated;

And the terminal notifying the determined PDN connection to the network side device, where the terminal carries a request bearer resource modification message sent to the network side device, where the terminal carries a dedicated bearer corresponding to the request, The PDN connection is a indication that the network side device does not need to initiate a PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.
The method according to claim 8, wherein after the terminal sends a request for a bearer resource modification message to the network side device, the method further includes:

After receiving the bearer setup request message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when the SIPTO function is executed. The information about the PDN connection corresponding to the dedicated bearer, where the bearer setup request message carries the prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message.
The method according to any one of claims 1 to 7, wherein if the terminal currently needs to transmit a specific type of IP stream and can transmit using the established bearer of the established PDN connection of the terminal, then:

The terminal determines that the network side device does not need to initiate a PDN connection that carries the deactivation process with the reactivation request, and the terminal does not need to initiate carrying when determining that the locally stored network side device performs the SIPTO function. When the PDN connection of the deactivation process with the reactivation request does not include the PDN connection used for transmitting the specific type of IP flow, the PDN connection used for transmitting the specific type of IP flow is determined as the network side device is executing. The SIPTO function does not need to initiate a PDN connection carrying a deactivation procedure with a reactivation request;

The terminal notifying the determined PDN connection to the network side device, the method includes: the terminal sending a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is the current transmission a PDN connection used by a specific type of IP flow, and carrying a PDN connection used to indicate that the terminal requests to establish a PDN connection that does not need to initiate a deactivation process carrying a reactivation request when the SIPTO function is performed by the network side device. Instructions.
The method according to claim 10, wherein after the terminal sends a PDN connection request message to the network side device, the method further includes:

The terminal receives the PDN connection reject message returned by the network side device, and the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and increases the current transmission. The information of the PDN connection used by the specific type of IP flow, where the PDN connection reject message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.
The method according to claim 1, wherein the network side device determined by the terminal does not need to initiate a PDN connection carrying a deactivation process with a reactivation request to complete a specific type of IP flow when performing a SIPTO function. And transmit and no longer transmit any particular type of IP flow, the method further includes:

For the PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any particular type of IP flow, the terminal notifies the network side device that when the SIPTO function is performed, the PDN connection may be initiated and carried The requesting deactivation process is activated, and the locally stored network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and deletes the information of the PDN connection.
The method of claim 12 wherein the PDN connection for any particular type of IP flow is no longer transmitted for the transmission of the particular type of IP flow:

The terminal initiates a release process of the PDN connection to the network side device; or

The terminal initiates a release process and a reconstruction process of the PDN connection to the network side device; or

The terminal sends a request bearer resource modification message to the network side device, and carries a PDN connection corresponding to the bearer that is requested to be modified by the network side device when the SIPTO function is performed by the network side device. The indication information carrying the deactivation process with the reactivation request may be initiated, and after receiving the deactivated evolved packet system EPS bearer context request message or the session management request message returned by the network side device, the locally stored network side device is The SIPTO function does not need to initiate the information of deleting the PDN connection in the PDN connection carrying the deactivation procedure with the reactivation request, where the deactivated EPS bearer context request message or the session management request message is carried in the receiving terminal to indicate that the receiving terminal is The prompt information of the indication information carried in the bearer resource modification message is requested; or

The terminal sends a PDN connection request message to the network side device, and the PDN connection request message carries a PDN connection that is required to be established for the network side device to perform the SIPTO function, and may be initiated and carried. The indication information of the deactivation process of the activation request, and after receiving the PDN connection rejection message returned by the network side device, the locally stored network side device does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function. Deleting the PDN connection information in the PDN connection, wherein the PDN connection requested by the PDN connection request message is a PDN connection in which the transmission of the specific type of IP stream is completed and no specific type of IP flow is transmitted anymore. The PDN connection reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.
The method of claim 2, 5, 6, 12 or 13, wherein the specific type of IP flow comprises a long lifecycle IP flow and a real time IP flow, wherein the long lifecycle IP flow refers to The IP stream whose data transmission time is greater than the set threshold.
A method for guaranteeing the continuity of Internet Protocol IP, characterized in that the method comprises:

The network side device that obtains the terminal notification by the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

When performing the SIPTO function, for the APN associated with the SIPTO grant and when the SIPTO function is executed, it is not necessary to initiate a PDN connection carrying the deactivation procedure with the reactivation request, the network side device does not initiate the carrying of the reactivation request. Activation process.
The method according to claim 15, wherein the network side device that the network side device acquires the terminal does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, including:

Receiving, by the network side device, a first request message sent by the terminal, where the carrying terminal in the first request message determines The network side device does not need to initiate information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

Or the network side device sends a first notification message to the terminal when the SIPTO function is determined to be performed, and carries the APN that needs to perform the SIPTO function in the first notification message, to indicate that the terminal is to the network. The side device sends the related information related to the APN indicated in the first notification message and does not need to initiate the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function; and receives the third reply returned by the terminal The message that the network side device determined by the terminal carrying the third reply message does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

Or the network side device sends a second notification message to the terminal to instruct the terminal to send to the network side device that the network side device does not need to initiate a deactivation process carrying the reactivation request when performing the SIPTO function. Corresponding information of the PDN connection; and receiving a third reply message returned by the terminal, wherein the third reply message carries the network side device determined by the terminal, and does not need to initiate a reactivation request when performing the SIPTO function. Information about the PDN connection of the activation process;

Or the network side device receives the PDN connection request message sent by the terminal, where the PDN connection request message carries a new PDN connection that is used to indicate that the terminal requests to establish, and the network side device does not need to perform the SIPTO function. Initiating an indication of a PDN connection carrying a deactivation procedure with a reactivation request;

Or the network side device receives the request bearer resource modification message sent by the terminal, where the request bearer resource modification message carries a PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal to be a network side device, and performs SIPTO. The function does not need to initiate an indication of a PDN connection carrying a deactivation procedure with a reactivation request;

Alternatively, the network side device receives the PDN connection request message sent by the terminal, and when it is determined that the PDN connection requested by the PDN connection request message is a PDN connection established by the terminal, the PDN connection request message is requested to be established. The PDN connection is determined to be that the network side device does not need to initiate a PDN connection carrying the deactivation procedure of the reactivation request when performing the SIPTO function, where the PDN connection request message carries a PDN connection indicating that the terminal requests to establish the network. The side device does not need to initiate an indication of the PDN connection carrying the deactivation procedure with the reactivation request when performing the SIPTO function.
The method of claim 16 wherein the method further comprises:

After receiving the first request message sent by the terminal, the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request for each network side device carried in the first request message. And storing, in the context of the PDN connection stored locally, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returning the first reply message to the terminal for confirmation ;or,

After receiving the third reply message sent by the terminal, the network side device carries the third reply message. Each of the network side devices does not need to initiate a PDN connection carrying a deactivation process with a reactivation request when performing the SIPTO function, and is stored in the context of the locally stored PDN connection to indicate that the SIPTO function is not A PDN connection initiates information carrying a deactivation process with a reactivation request; or,

After receiving the PDN connection request message sent by the terminal, the network side device stores, in the context of the PDN connection that the terminal requests to establish, to indicate that the PDN connection is not carried when the SIPTO function is executed. Re-activating the information of the requested deactivation process, and returning a PDN connection accepting message to the terminal, the PDN connection accepting message carrying the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message; or ,

After receiving the request bearer resource modification message sent by the terminal, the network side device stores, in the context of the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, to indicate that the PDN connection is not performed when the SIPTO function is executed. Initiating the information of the deactivation process carrying the reactivation request, and returning a bearer setup request message to the terminal, where the bearer setup request message carries the indication information that is received by the terminal in the request bearer resource modification message. Prompt message; or,

After receiving the PDN connection request message sent by the terminal, and determining that the PDN connection requested by the PDN connection request message is the PDN connection established by the terminal, the network side device requests to establish the PDN connection request message. And storing, in the context of the PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returning a PDN connection reject message to the terminal, the PDN connection reject message The prompt information indicating the acceptance of the indication information carried by the terminal in the PDN connection request message is carried.
The method of claim 16 wherein the method further comprises:

The network side device is connected to the second request message sent by the receiving terminal, and the second request message carries the updated network side device determined by the terminal, and does not need to initiate a reactivation request when performing the SIPTO function. Information about the PDN connection of the deactivation process;

Updating, by the network side device, the updated network side device carried in the second request message does not need to initiate information about a PDN connection carrying a deactivation process with a reactivation request, and updates the locally stored network when performing the SIPTO function. The side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and returns a second reply message to the terminal for confirmation.
The method of claim 16 wherein the method further comprises:

Receiving, by the network side device, the PDN connection that the network side device that is determined by the terminal to perform the SIPTO function and does not need to initiate the deactivation process carrying the reactivation request when the SIPTO function is executed by the terminal may initiate carrying After the notification of the deactivation process of the request is reactivated, in the context of the locally stored PDN connection, the stored deletion is used to indicate that the deactivation with the reactivation request is not initiated for the PDN connection when the SIPTO function is executed. Process information.
The method of claim 19 wherein:

After receiving the request bearer resource modification message sent by the terminal, the network side device deletes the stored context for indicating that the SIPTO function is not performed in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal. Initiating the information about the deactivation process carrying the reactivation request for the PDN connection, and returning the deactivated EPS bearer context request message to the terminal, where the request bearer resource modification message is carried in the device to indicate that the network side device is executing. The PDN connection corresponding to the bearer that is requested to be modified by the terminal may initiate the indication information of the deactivation process carrying the reactivation request, and the deactivated EPS bearer context request message is carried in the request to indicate that the terminal is in the request. The prompt information carrying the indication information carried in the resource modification message; or

After receiving the request bearer resource modification message sent by the terminal, the network side device deletes the stored context for indicating that the SIPTO function is not performed in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal. Initiating information about the deactivation process carrying the reactivation request for the PDN connection, and returning a session management request message to the terminal, where the request bearer resource modification message is carried in the network device to indicate that the network side device is performing the SIPTO function. The PDN connection corresponding to the bearer that is requested to be modified by the terminal may initiate the indication information of the deactivation process that carries the reactivation request, where the session management request message is used to indicate that accepting the terminal to carry in the request bearer resource modification message a message indicating the information; or,

Receiving, by the network side device, the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the locally stored terminal, deleting the stored used to indicate that the PDN connection is not carried when the SIPTO function is executed. Re-activating the information of the requested deactivation process, and returning a PDN connection reject message to the terminal, where the PDN connection request message carries a PDN for indicating that the network side device requests to establish the terminal when performing the SIPTO function. The connection may initiate the indication information of the deactivation process carrying the reactivation request, and the PDN connection rejection message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.
A terminal, the terminal comprising:

a processing module, configured to determine that the network side device does not need to initiate a PDN connection carrying a deactivation process with a reactivation request when performing the SIPTO function;

And a notification module, configured to notify the network side device of the PDN connection determined by the processing module.
The terminal according to claim 21, wherein the processing module is specifically configured to: determine that a specific type of IP stream is currently transmitted from a PDN connection that is established by the terminal and associated with an APN having a SIPTO license. PDN connection, and determining the determined PDN connection as the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The notification module is specifically configured to: send a first request message to the network side device, and carry the network side device determined by the first request message in the first request message, and do not need to initiate the reactivation request when performing the SIPTO function. Information about the PDN connection of the activation process.
The terminal according to claim 22, wherein after the notification module sends the first request message to the network side device, the processing module is further configured to: after receiving the first reply message returned by the network side device, storing The network side device determined by itself does not need to initiate the information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.
The terminal according to claim 23, wherein the notification module notifies the network side device of the determined PDN connection,

The processing module is further configured to: after the determined network side device does not need to initiate a change of the PDN connection carrying the deactivation process with the reactivation request, the terminal determines that the updated network side device is executing The SIPTO function does not need to initiate a PDN connection carrying the deactivation process with the reactivation request; and after receiving the second reply message returned by the network side device, updating the network side device stored by itself does not need to perform the SIPTO function. Initiating information of a PDN connection carrying a deactivation process with a reactivation request;

The notification module is further configured to: send a second request message to the network side device, and perform, in the second request message, the updated network side device that is determined by the processing module does not need to perform the SIPTO function. Initiating information about the PDN connection carrying the deactivation process with the reactivation request.
The terminal of claim 21, wherein

The processing module is specifically configured to: after receiving the first notification message sent by the network side device, determine the current transmission from the PDN connection that is established by the terminal and related to the APN carried in the first notification message. Determining the PDN connection of the specific type of IP flow, and determining the determined PDN connection as the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, where the first notification message is carried An APN that needs to perform the SIPTO function; or, after receiving the second notification message sent by the network side device, determining, from the PDN connection established by the terminal and related to the APN with SIPTO permission, currently transmitting a specific type of IP The PDN connection of the flow, and determining the determined PDN connection as the network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The notification module is specifically configured to: send a third reply message to the network side device, and carry the self-determined network side device in the third reply message, and do not need to initiate a reactivation request when performing the SIPTO function. Information about the PDN connection of the deactivation process.
The terminal according to claim 21, wherein if the terminal currently needs to transmit a specific type of IP stream and needs to establish a new PDN connection for transmission, then:

The processing module is specifically configured to: determine that the new PDN connection is a PDN connection that the network side device does not need to initiate a deactivation process that carries a reactivation request when performing a SIPTO function;

The notification module is specifically configured to: send a PDN connection request message to the network side device, and carry the PDN connection request message in the PDN connection request message to indicate that the PDN connection requested by the terminal is a network side device, and does not need to initiate carrying when performing the SIPTO function. There is an indication of the PDN connection for the deactivation process of the reactivation request.
The terminal according to claim 26, wherein after the notification module sends a PDN connection request message to the network side device, the processing module is further configured to:

After receiving the PDN connection accept message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and adds the new PDN connection. The PDN connection accept message carries the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.
The terminal according to any one of claims 21 to 27, wherein if the terminal currently needs to transmit a specific type of IP stream and needs to establish a dedicated bearer for transmission in the established PDN connection of the terminal, then:

The processing module is specifically configured to: when determining that the locally stored network side device does not need to initiate the PDN connection corresponding to the dedicated bearer that is required to be established, the PDN connection that does not include the dedicated bearer that is required to be used in the process of performing the SIPTO function Determining, by the network side device, the PDN connection that carries the deactivation process carrying the reactivation request when the SIPTO function is performed on the PDN connection corresponding to the dedicated bearer that is required to be established;

The notification module is specifically configured to: when the request bearer resource modification message sent to the network side device carries the PDN connection corresponding to the dedicated bearer that the terminal requests to establish, the network side device does not need to initiate carrying when performing the SIPTO function. Reinstructs the indication of the PDN connection for the requested deactivation process.
The terminal according to claim 28, wherein after the notification module sends a request for a bearer resource modification message to the network side device, the processing module is further configured to:

After receiving the bearer setup request message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when the SIPTO function is executed, and the corresponding dedicated bearer is added. The PDN connection information, where the bearer setup request message carries prompt information indicating that the accepting terminal carries the indication information carried in the bearer resource modification message.
The terminal according to any one of claims 21 to 27, wherein if the terminal currently needs to transmit a specific type of IP stream and can transmit using the established bearer of the established PDN connection of the terminal, then:

The processing module is specifically configured to: when determining that the locally stored network side device performs the SIPTO function, the PDN connection that does not need to initiate the deactivation process carrying the reactivation request does not include the current use of transmitting the specific type of IP flow. When the PDN is connected, the PDN connection used for transmitting the specific type of IP flow is determined as the PDN connection of the network side device that does not need to initiate the deactivation process carrying the reactivation request when performing the SIPTO function;

The notification module is specifically configured to: send a PDN connection request message to the network side device, where the PDN connection requested by the PDN connection request message is a PDN connection used for transmitting a specific type of IP flow, and is carried Indicates that the PDN connection that the terminal requests to establish is that the network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function.
The terminal according to claim 30, wherein after the notification module sends a PDN connection request message to the network side device, the processing module is further configured to:

Receiving the PDN connection reject message returned by the network side device, the locally stored network side device does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and increases the specific type of IP flow to be transmitted this time. The information of the PDN connection used, wherein the PDN connection reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.
The terminal according to claim 21, wherein the network side device determined by the processing module does not need to initiate a PDN connection carrying the deactivation process with a reactivation request to complete a specific type of IP when performing the SIPTO function. Streaming of the stream and no longer transmitting any particular type of IP stream:

The processing module is further configured to: for the PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any specific type of IP flow, the locally stored network side device does not need to initiate carrying when performing the SIPTO function. In the PDN connection with the deactivation process of the reactivation request, the information of the PDN connection is deleted;

The notification module is further configured to notify the network side device to connect to the PDN when performing the SIPTO function for the PDN connection that has completed transmission of a specific type of IP flow and no longer transmits any specific type of IP flow. A deactivation process carrying a reactivation request can be initiated.
The terminal of claim 32, wherein the PDN connection for the transmission of the particular type of IP stream is completed and no particular type of IP flow is transmitted anymore:

The notification module is specifically configured to initiate a release process of the PDN connection to the network side device; or

The notification module is specifically configured to initiate a release process and a reconstruction process of the PDN connection to the network side device; or

The notification module is specifically configured to send a request bearer resource modification message to the network side device, and the bearer resource modification message carries a bearer corresponding to the bearer requested by the network side device when the SIPTO function is executed. The PDN connection may initiate the indication information carrying the deactivation process with the reactivation request; and the processing module is specifically configured to store locally after receiving the deactivated EPS bearer context request message or the session management request message returned by the network side device The network side device does not need to initiate the PDN connection carrying the deactivation process with the reactivation request to delete the information of the PDN connection when performing the SIPTO function, and the deactivated EPS bearer context request message or the session management request message is carried in the Receiving the prompt information of the indication information carried in the requesting bearer resource modification message by the terminal; or

The notification module is specifically configured to send a PDN connection request message to the network side device, and carry the PDN connection request message in the PDN connection request message to indicate that the PDN connection requested by the network side device for the terminal is initiated to be carried. The indication information of the deactivation process of the reactivation request; and the processing module is specifically configured to: after receiving the PDN connection rejection message returned by the network side device, the locally stored network side device does not need to initiate carrying when performing the SIPTO function The information of the PDN connection is deleted in the PDN connection of the deactivation process with the reactivation request, wherein the PDN connection requested by the PDN connection request message is the transmission of the completed specific type of IP flow and no longer transmits any specific A PDN connection of the IP flow of the type, the PDN connection reject message carrying the prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.
A network side device, where the network side device includes:

a processing module, where the network side device used to obtain the terminal notification does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function;

The SIPTO execution module is configured to perform a SIPTO function, and is not required to initiate a PDN connection carrying a deactivation request carrying a reactivation request when the SIPTO function is performed, and does not initiate a PDN connection carrying a reactivation request. Deactivate the process.
The network side device according to claim 34, wherein the processing module is specifically configured to:

Receiving a first request message sent by the terminal, where the network side device that is determined by the terminal in the first request message does not need to initiate information about a PDN connection carrying a deactivation process with a reactivation request when performing a SIPTO function; or,

When it is determined that the SIPTO function is performed, the first notification message is sent to the terminal, and the APN that needs to perform the SIPTO function is carried in the first notification message, to indicate that the terminal sends the first notification message to the network side device. The APN related to the indication and does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and receiving the third reply message returned by the terminal, the third reply message carrying the terminal The determined network side device does not need to initiate information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; or

Sending a second notification message to the terminal, to instruct the terminal to send, to the network side device, the network side device does not need to initiate related information of the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and receiving the terminal a third reply message, the network side device determined by the terminal carrying the third reply message does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; or

Receiving a PDN connection request message sent by the terminal, where the PDN connection request message carries a new PDN connection that is used to indicate that the terminal requests to establish, and the network side device does not need to initiate deactivation with a reactivation request when performing the SIPTO function. Indication of the PDN connection of the process; or,

Receiving a request bearer resource modification message sent by the terminal, where the request bearer resource modification message carries a PDN connection corresponding to the dedicated bearer that is requested to be established by the terminal, and the network side device does not need to initiate retransmission when performing the SIPTO function. The indication of the PDN connection of the requested deactivation process; or,

Receiving a PDN connection request message sent by the terminal, and determining that the PDN connection established by the PDN connection request message is a PDN connection established by the PDN connection request message, determining the PDN connection established by the PDN connection request message as the network side The device does not need to initiate a PDN connection carrying the deactivation process with a reactivation request, where the PDN connection request message carries a PDN connection that is required to be established by the terminal to be a network side device when performing the SIPTO function. There is no need to initiate an indication of a PDN connection carrying a deactivation procedure with a reactivation request.
The network side device according to claim 35, wherein the processing module is further configured to:

After receiving the first request message sent by the terminal, each network side device carried in the first request message does not need to initiate a PDN connection carrying a deactivation process with a reactivation request when performing the SIPTO function. The stored information of the PDN connection is stored to indicate that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO is executed, and the first reply message is returned to the terminal for confirmation;

Or, after receiving the third reply message sent by the terminal, each network side device carried in the third reply message does not need to initiate a PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function. Storing, in the context of the locally stored PDN connection, information indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when the SIPTO function is performed;

Or, after receiving the PDN connection request message sent by the terminal, in a context of the PDN connection requested by the terminal, storing, in the context of performing the SIPTO function, not carrying the reactivation request for the PDN connection Activating the process information, and returning a PDN connection accept message to the terminal, where the PDN connection accept message carries prompt information indicating that the accepting terminal carries the indication information carried in the PDN connection request message;

Or, after receiving the request bearer resource modification message sent by the terminal, in a context of a PDN connection corresponding to the dedicated bearer that the terminal requests to establish, storing is used to indicate that the PDN connection is not initiated when performing the SIPTO function. Carrying the information of the deactivation process of the reactivation request, and returning a bearer setup request message to the terminal, where the bearer setup request message carries a prompt for indicating that the terminal is required to receive the indication information carried in the request bearer resource modification message information;

Alternatively, after receiving the PDN connection request message sent by the terminal and determining that the PDN connection requested by the PDN connection request message is a PDN connection established by the terminal, the context of the PDN connection requested by the PDN connection request message is established. And storing information for indicating that the deactivation process carrying the reactivation request is not initiated for the PDN connection when performing the SIPTO function, and returning a PDN connection reject message to the terminal, where the PDN connection reject message is carried in the representation And receiving the prompt information of the indication information carried by the terminal in the PDN connection request message.
The network side device according to claim 35, wherein the processing module is further configured to: receive a second request message sent by the terminal, where the second request message carries an update determined by the terminal The network side device does not need to initiate the information about the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function; and the SIPTO function is performed according to the updated network side device carried in the second request message. The information about the PDN connection carrying the deactivation process with the reactivation request does not need to be initiated, and the network side device that updates the local storage does not need to initiate the PDN connection carrying the deactivation process with the reactivation request when performing the SIPTO function, and The terminal returns a second reply message for confirmation.
The network side device according to claim 35, wherein the processing module is further configured to: receive, by the terminal, a SIPTO function performed by the network side device determined by the terminal for performing the SIPTO function The PDN connection that does not need to initiate the deactivation process carrying the reactivation request may initiate the notification of the deactivation process carrying the reactivation request, and delete the stored representation for the representation in the context of the locally stored PDN connection. The information carrying the deactivation process with the reactivation request is not initiated for the PDN connection when the SIPTO function is executed.
The network side device according to claim 38, wherein the processing module is specifically configured to:

After receiving the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal, deleting the stored information indicating that the PDN connection is not performed when the SIPTO function is executed. Initiating the information of the deactivation process with the reactivation request, and returning the deactivated EPS bearer context request message to the terminal, where the request bearer resource modification message is carried in the network device to indicate that the network side device is performing the SIPTO function for the terminal. The PDN connection corresponding to the bearer that is requested to be modified may initiate the indication information of the deactivation process carrying the reactivation request, where the deactivated EPS bearer context request message carries the indication information that is included in the requesting bearer resource modification message. Prompt message; or,

After receiving the request bearer resource modification message sent by the terminal, in the context of the PDN connection corresponding to the bearer requested by the locally stored terminal, deleting the stored information indicating that the PDN connection is not performed when the SIPTO function is executed. Initiating information about the deactivation process that carries the reactivation request, and returning a session management request message to the terminal, where the request bearer resource modification message is carried in the network device to indicate that the network side device is performing the SIPTO function for the terminal. The PDN connection corresponding to the bearer requesting the modification may initiate the indication information of the deactivation process carrying the reactivation request, where the session management request message carries the prompt information indicating that the receiving terminal carries the indication information carried in the bearer resource modification message; Or, receiving the PDN connection request message sent by the terminal, in the context of the PDN connection requested by the locally stored terminal, deleting the stored used to indicate that the PDN connection is not carried when the SIPTO function is executed. Activate the information of the requested deactivation process and return the PDN to the terminal Receiving a reject message, wherein the PDN connection request message carries indication information indicating that the PDN connection that the network side device requests to establish for the terminal when performing the SIPTO function may initiate a deactivation process carrying the reactivation request, where The PDN connection reject message carries prompt information indicating that the receiving terminal carries the indication information carried in the PDN connection request message.