WO2010051777A1

WO2010051777A1 - Information transmission method, resource deletion method and device

Info

Publication number: WO2010051777A1
Application number: PCT/CN2009/074883
Authority: WO
Inventors: 吴问付; 周汉
Original assignee: 华为技术有限公司
Priority date: 2008-11-10
Filing date: 2009-11-10
Publication date: 2010-05-14

Abstract

An information transmission method, a resource deletion method and a device are provided. The information transmission method includes the following steps. The wireless network receives a first connection request sent by terminal equipment. The wireless network obtains the Access Point Name (APN) according to the first connection request. The wireless network sends the terminal equipment the indication information used for indicating that the terminal equipment should judge whether it sends the wireless network more than two Packet Data Network (PDN) connection requests for the APN according to the indication information. Unnecessary signaling interaction between the wireless network and the terminal equipment can be avoided by the present invention.

Description

The invention claims the Chinese patent application filed on November 10, 2008, the application number is 200810217416.3, the invention name is "an information transmission method and device", and the June 22, 2009 The application number of the Japanese Patent Application No. 200910146384.7, the entire disclosure of which is incorporated herein by reference. Technical field

The present invention relates to the field of communications, and in particular, to an information transmission method and apparatus. Background technique

In the prior art, the wireless network selects a packet data network that the terminal device wants to access through the access point name APN. In order to implement the service of the terminal device in the packet data network, the bearer needs to establish a bearer for service transmission, where the terminal device and the packet data network The set of inter-bearers is called a PDN connection. In different cases, the number of PDN connections that the wireless network supports for an APN is different. For example, corresponding to an APN, if the packet data network allocates an IP address to the terminal device, the wireless network supports establishing a PDN connection for one APN, and if the packet data network allocates more than two IP addresses for the terminal device, the wireless network Two or more PDN connections are established for one APN support; for example, the protocol adopted by the wireless network for the APN is different, and the number of PDN connections supported by the wireless network for the APN is different.

Therefore, in the case that the wireless network only supports establishing one PDN connection for one APN, if the terminal device sends two or more PDN connection requests to the wireless network for the APN, the wireless network rejects the PDN connection request, thereby causing no Necessary signaling interaction.

And, when the terminal device is moved by a source wireless network (3GPP network, such as E-UTRAN/UTRAN/GERAN), which can establish more than two PDN connections for one APN, to a target wireless network that supports only one PDN connection for one APN. Time (non-3GPP network, such as Wimax, WLAN, HRPD, etc.), the source wireless network will have redundant resources of PDNs that are not established in the target wireless network. Summary of the invention

The present invention provides an information transfer method and apparatus for reducing unnecessary signaling interaction between a terminal device and a wireless network.

The present invention also provides a method and apparatus for resource deletion to release redundant resources generated when a terminal device moves from a 3GPP network to a non-3GPP network.

An embodiment of the present invention provides a method for transmitting information, including: receiving, by a wireless network, a first connection request sent by a terminal device; acquiring, according to the first connection, the wireless network, an access point name APN; The terminal device sends the indication information, where the indication information is used to instruct the terminal device to determine, according to the indication information, whether two or more PDN connection requests are sent to the wireless network for the APN.

An embodiment of the present invention provides a control device, including: a receiving unit, configured to receive a first connection request sent by a terminal device; an acquiring unit, configured to acquire an access point name APN according to the first connection request; And transmitting the indication information to the terminal device, where the indication information is used to instruct the terminal device to determine, according to the indication information, whether two or more PDN connection requests are sent to the wireless network for the APN.

An embodiment of the present invention provides a terminal device, including: a sending unit, configured to send a first connection request to a wireless network; a receiving unit, configured to receive indication information sent by the wireless network, where the indication information is used to indicate the Determining, according to the indication information, whether the APN corresponding to the first connection request sends two or more PDN connection requests to the wireless network, and determining, by the determining unit, determining, according to the indication information, whether the APN is sent to the wireless The network sends more than two PDN connection requests.

In an embodiment of the present invention, the wireless network sends the indication information to the terminal device, so that the terminal device determines, according to the indication information, whether the APN is directed to the wireless network. Sending more than two PDN connection requests to avoid unnecessary signaling interaction between the wireless network and the terminal device, saving resources of the wireless network and the terminal device.

Embodiments of the present invention also provide a method and apparatus for resource deletion to reduce a source wireless network (3GPP network, such as E-UTRAN/UTRAN/GERAN) when a terminal device can establish more than two PDN connections for one APN. Moving to a target wireless network (non-3GPP networks such as Wimax, WLAN, HRPD, etc.) that only supports establishing a PDN connection for an APN, the source wireless network cannot delete the PDN connection that was not established on the target wireless network, resulting in There is a problem that redundant resources cannot be released in the source wireless network.

A method for resource deletion, comprising: when a terminal switches from a source network to a target network, where the target network supports only one PDN connection under the APN; the packet data gateway establishes a PDN connection for the APN in the target wireless network. Deleting a PDN connection in the source network corresponding to the PDN connection; if the terminal establishes multiple PDN connections under the APN of the source wireless network, the packet data gateway further deletes the source network, and the terminal is in the Other PDN connections under the APN.

A packet data gateway includes an establishing unit, a deleting unit, and a determining unit. When the terminal switches from the source network to support only one PDN connection target network under the APN, the establishing unit is configured to target the APN in the target wireless network. Establishing a PDN connection; the deleting unit is configured to delete a PDN connection in the source network corresponding to the PDN connection; the determining unit is configured to determine, if the terminal is established in the APN of the source wireless network, PDN connection, if yes, the deleting unit is further used to delete other PDN connections of the terminal in the source network under the APN.

In an embodiment of the present invention, when the terminal switches from the source network to the target network, the packet data gateway establishes a PDN connection for the APN in the target wireless network, and deletes the PDN connection in the source network corresponding to the PDN connection; The terminal in the APN of the source wireless network establishes a plurality of PDN connections, and the packet data gateway further deletes other PDN connections of the terminal in the APN under the APN. By deleting the PDN connection that was not established on the target wireless network In addition, the redundant resources of the source wireless network are released in time.

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

FIG. 1 is a schematic diagram of a wireless network according to an embodiment of the present invention; FIG.

2 is a flowchart of an exemplary method for transmitting information according to Embodiment 1 of the present invention; FIG. 3 is a flowchart of an exemplary method for transmitting information according to Embodiment 2 of the present invention; FIG. 5 is a flowchart of an exemplary method for an information delivery method according to Embodiment 4 of the present invention; FIG. 6A and FIG. 6B are diagrams of a control device according to an embodiment of the present invention; FIG. 7A and FIG. 7B are schematic diagrams of functions of a terminal device according to an embodiment of the present invention; FIG. 8 is a flowchart of an exemplary method for deleting a resource according to an embodiment of the present invention; An exemplary method flowchart of a resource deletion method; FIG. 10 is a schematic structural diagram of a packet data gateway according to an embodiment of the present invention. detailed description

The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments. Referring to FIG. 1, FIG. 1 is a schematic diagram of a wireless network 1 including a control device 6 and a grouping according to an embodiment of the present invention. Data Gateway 5.

The control device 6 is configured to be responsible for processing of control signaling such as mobility management, user access control, traffic bearer control, paging or control layer signaling processing of the user. The control device 6 in the 3GPP protocol standard may include a mobility management entity, the control device in the non-3GPP protocol standard

6 may include a mobile access gateway.

4

Correction page (Article 91) The packet data gateway 5 can be connected to different data networks for establishing a bearer according to the service bearer control of the control device 6, receiving data sent by the terminal device, and selecting the data to the corresponding external network, and receiving data of the external network. And sent to the terminal device.

The control device 6 selects the packet data gateway 5 according to the APN, and the interface protocol type applied by the selected packet data gateway 5 determines whether the wireless network supports establishing a PDN connection for the APN or supporting establishing more than two PDN connections.

In the case that the wireless network supports establishing a PDN connection for the APN, if the terminal device sends two or more PDN connections to the wireless network for the APN, the wireless network may reject the connection request of the terminal device. This increases unnecessary signaling interactions. In order to reduce the unnecessary signaling interaction, the wireless network in the embodiment of the present invention sends the indication information to the terminal device, so that the terminal device determines, according to the indication information, whether to send two or more PDN connections to the wireless network for the APN. In the case that the wireless network supports establishing a PDN connection for the APN, the terminal device determines, according to the indication information, that no more than two PDN connections are sent to the wireless network, thereby avoiding a relationship between the wireless network and the terminal device. Unnecessary signaling interaction saves resources of the wireless network and terminal equipment.

Referring to FIG. 2, FIG. 2 is a flow chart of an exemplary method for an information delivery method according to Embodiment 1 of the present invention. The method process includes the following steps:

S21: The wireless network receives the first connection request sent by the terminal device.

In a specific implementation, the first connection request may carry an access point name APN, and the wireless network selects, by using the APN, a packet data network that the terminal device wishes to access.

The first connection request may be an attach request or a PDN connection request.

S22: The wireless network acquires an access point name APN according to the first connection request.

If the first connection request carries the access point name APN, the wireless network acquires the APN from the first connection request, and if the first connection request does not carry the access point name, the wireless network allocates the terminal device according to the first connection request. APN.

S23: The wireless network sends indication information to the terminal device, where the indication information is used. Instructing the terminal device to determine, according to the indication information, whether to send two or more PDN connection requests to the wireless network for the APN.

The indication information includes information about the number of PDN connections established by the wireless network for the APN or protocol type information supported by the wireless network for the APN, where the wireless network supports establishing the number of PDN connections for the APN. The information includes that the wireless network supports establishing one PDN connection or two or more PDN connections for the APN, and the protocol type information supported by the wireless network for the APN includes a GPRS tunneling protocol referred to as a GTP protocol or a proxy mobile internet protocol (PMIP). protocol.

If the indication information includes that the wireless network supports establishing a PDN connection for the APN or the wireless network supports the PMIP protocol for the APN, the terminal device determines, according to the indication information, that the APN is not directed to The wireless network sends more than two PDN connection requests.

In the embodiment of the invention, two or more include two or more.

If the indication information sent by the wireless network to the terminal device includes information that the wireless network supports establishing a PDN connection for the APN or the wireless network supports a PMIP protocol for the APN, the terminal device according to the The indication information determines that two or more PDN connection requests are not sent to the wireless network for the APN, so that unnecessary signaling interaction between the wireless network and the terminal device can be avoided, and resources of the wireless network and the terminal device are saved.

Referring to FIG. 3, FIG. 3 is a flowchart of an exemplary method for an information delivery method according to Embodiment 2 of the present invention. The method process includes the following steps:

S31: The wireless network receives the first connection request sent by the terminal device.

S32: The wireless network acquires an access point name APN according to the first connection request.

If the first connection request carries the access point name APN, the wireless network acquires the APN from the first connection request, and if the first connection request does not carry the access point name, the wireless network allocates the terminal device according to the first connection request. The APN.

S33: The wireless network sends indication information to the terminal device, where the indication information includes The wireless network supports the establishment of a PDN connection number information for the APN, and the wireless network supports establishing the PDN connection number information for the APN, where the wireless network supports establishing a PDN connection or two or more PDNs for the APN. connection.

In a specific implementation, the wireless network sends the indication information to the terminal device, where the indication information includes a One PDN per APN support indication indicating cell or a Multiple PDN per APN support indication indicating cell or an ER APN support indication f indicating a cell, wherein the One PDN per APN support indication f message indicates that the wireless network supports establishing a PDN connection for the APN, and the Multiple PDN per APN support indication indicating cell indicates the wireless The network supports establishing two or more PDN connections for the APN, and the per APN support indication indicating cell indicates that the wireless network supports establishing PDN connection information for the APN, if the per APN support indication indicates that the cell is assigned a value Representing that the wireless network establishes a PDN connection for the APN support, and if the per APN support indication indicates that the cell is assigned more than two, the wireless network establishes two or more PDN connections for the APN support.

The wireless network sending the indication information to the terminal device may have different implementation manners, for example:

In the authentication authentication process of the 3GPP protocol standard or the non-3GPP protocol standard, the wireless network sends the indication information to the terminal device by using an authentication authentication message; or

In the terminal device attaching process of the 3GPP protocol standard, the wireless network sends the indication information to the terminal device by using an attach accept message; or

In the terminal device attaching process of the non-3GPP protocol standard, the wireless network sends the indication information to the terminal device by using an attach completion message; or

In the terminal device initiated PDN connection establishment process of the 3GPP protocol standard, the wireless network sends the indication information to the terminal device by using a bearer setup request message or a PDN connection establishment reject message; or

In the process of establishing a PDN connection by a terminal device other than the 3GPP protocol standard, the wireless The network sends the indication information to the terminal device by returning a new PDN connection information message or a PDN connection establishment rejection message; or

In the authentication authentication process of the 3GPP protocol standard or the non-3GPP protocol standard, the terminal device attachment process of the 3GPP protocol standard, the terminal device attachment process of the non-3GPP protocol standard, and the terminal device of the 3GPP protocol standard initiate PDN connection establishment. During the process of establishing a PDN connection by the terminal device of the non-3GPP protocol standard, the indication information is also sent to the terminal device by adding a message.

The foregoing embodiments are merely examples, and the embodiments of the present invention are not limited thereto, and the indication information may also be sent through messages of other processes.

S34: The terminal device determines, according to the indication information, whether two or more PDN connection requests are sent to the wireless network for the APN.

In a specific implementation, if the indication information includes a One PDN per APN support indication indication cell, the terminal device determines, according to the indication information, that the

The APN does not send more than two PDN connection requests to the wireless network; if the indication information includes a Multiple PDN per APN support indication indication cell, the terminal device determines, according to the indication information, that the APN is The wireless network sends two or more PDN connection requests; if the indication information includes a per APN support indication indicating cell and is assigned to one, the terminal device determines, according to the indication information, that the APN is not directed to the wireless network. Sending two or more PDN connection requests; if the indication information includes a per APN support indication indication cell and is assigned two or more, the terminal device determines, according to the indication information, that the APN is not directed to the wireless network. Send more than two PDN connection requests.

The wireless network sends the indication information to the terminal device, if the indication information includes the information that the wireless network supports establishing a PDN connection for the APN, the terminal device determines, according to the indication information, that the APN is not Sending more than two PDN connection requests to the wireless network, thereby avoiding unnecessary signaling interaction between the wireless network and the terminal device, and saving resources of the wireless network and the terminal device. Referring to FIG. 4, FIG. 4 is a flowchart of an exemplary method for an information delivery method according to Embodiment 3 of the present invention. The method process includes the following steps:

S41: The wireless network receives the first connection request sent by the terminal device.

S42: The wireless network acquires an access point name APN according to the first connection request.

S43: The wireless network sends indication information to the terminal device, where the indication information includes protocol type information supported by the wireless network for the APN.

In a specific implementation, the type of protocol supported by the wireless network for the APN includes

The GPRS tunneling protocol is referred to as the GTP protocol, or the proxy mobile internet protocol proxy mobile IP is referred to as the PMIP protocol. If the protocol type of the wireless network supported by the APN is PMIP, the wireless network establishes a PDN for the APN. A connection, wherein if the wireless network supports a protocol type of the APN for the GTP protocol, the wireless network establishes two or more PDN connections for the APN support.

In the process of initiating a PDN connection establishment by the terminal device of the 3GPP protocol standard, the wireless network sends the indication information to the terminal device by using a bearer setup request message or a PDN connection setup reject message; or In the process of initiating a PDN connection establishment by a terminal device other than the 3GPP protocol standard, the wireless network sends the indication information to the terminal device by returning a new PDN connection information message or a PDN connection establishment reject message; or

S44: The terminal device determines, according to the indication information, whether two or more PDN connection requests are sent to the wireless network for the APN.

In a specific implementation manner, the wireless network that is included in the indication information is different in protocol type supported by the APN, and the determination result of the terminal device is different. For example, if the protocol type supported by the wireless network for the APN is PMIP protocol information, the terminal device determines, according to the indication information, that two APNs are not sent to the wireless network. a PDN connection request; if the indication information includes information that the wireless network supports the APN for a protocol type of the GTP protocol, the terminal device determines, according to the indication information, that the APN is directed to the wireless network. Send more than two PDN connection requests.

The wireless network sends the indication information to the terminal device, if the indication information includes the PMIP protocol supported by the wireless network for the APN, the terminal device determines, according to the indication information, that the APN is No more than two PDN connection requests are sent to the wireless network, thereby avoiding unnecessary signaling interaction between the wireless network and the terminal device, and saving resources of the wireless network and the terminal device.

Referring to FIG. 5, FIG. 5 is a flowchart of an exemplary method for transmitting information according to Embodiment 4 of the present invention. The method flow includes the following steps:

S51: The wireless network receives the first connection request sent by the terminal device.

S52: Acquire an access point name APN according to the first connection request wireless network.

S53: The wireless network sends the indication information to the terminal device, where the indication information is used to instruct the terminal device to determine, according to the indication information, whether to send two or more PDN connection requests to the wireless network for the APN.

S54. If the capability information of the wireless network changes, for example, the wireless network is configured to support establishing one PDN connection for the APN to support establishing two or more PDN connections, or the wireless network is established by the support for the APN. The plurality of PDN connections are changed to support the establishment of a PDN connection, and the wireless network sends the indication update information to the terminal device, where the indication update information is used to indicate that the terminal device determines, according to the indication update information, whether the APN is Sending more than two PDN connection requests to the wireless network.

The indication update information includes: the changed wireless network supports establishment of PDN connection number information for the APN or protocol type information supported by the wireless network for the APN, where the changed wireless network is targeted to The APN supports establishing the PDN connection number information, where the wireless network supports establishing one PDN connection or two or more PDN connections for the APN, and the protocol type information supported by the wireless network for the APN includes the wireless network support. GTP protocol or PMIP protocol.

Optionally, if the wireless network establishes N PDN connections for the APN, the N≥2, if the wireless network supports establishing more than two PDN connections for the APN, PDN connection, the wireless network releasing N-1 PDN connections in the N PDN connections.

S55. The terminal device determines, according to the indication update information, whether the APN is directed to the location. The wireless network sends more than two PDN connection requests.

If the indication update information includes that the wireless network supports establishing a PDN connection for the APN or the wireless network supports the PMIP protocol for the APN, the terminal device determines, according to the indication update information, that the APN is Not transmitting more than two PDN connection requests to the wireless network; or if the indication update information includes the wireless network supporting establishment of more than two PDN connections for the APN or the wireless network supporting the GTP protocol for the APN And the terminal device determines, according to the indication update information, that two or more PDN connection requests are sent to the wireless network for the APN.

Optionally, if the terminal device establishes N PDN connections for the APN, the N≥2, if the indication update information includes that the wireless network supports establishing a PDN connection or the APN for the APN. The wireless network supports information about the PMIP protocol for the APN, and the terminal device releases N-1 PDN connections in the N PDN connections.

If the capability information of the wireless network changes, the wireless network sends the indication update information to the terminal device, so that the terminal device determines, according to the indication update information, whether to send two for the APN to the wireless network. The above PDN connection request.

If the wireless network is configured to support establishing one PDN connection for the APN to support establishing two or more PDN connections, the terminal device determines to send two or more PDN connection requests to the wireless network according to the indication update information, When the APN needs to send two or more PDN connection requests to the wireless network, the terminal device sends two or more PDN connection requests to the wireless network according to the determination result, so that the terminal device satisfies in time under the condition that the wireless network can support. User needs.

If the wireless network is configured to support establishing two PDN connections for the APN to support establishing one PDN connection, the terminal device determines, according to the indication update information, that no more than two PDN connection requests are sent to the wireless network. Therefore, unnecessary signaling interaction between the wireless network and the terminal device can be avoided, and resources of the wireless network and the terminal device are saved.

Conditions for establishing N PDN connections for the APN in the wireless network and the terminal device Next, N≥2, if the wireless network is configured to support establishing two PDN connections for the APN to support establishing a PDN connection, the wireless network and the terminal device release N-1 PDN connections therein in time. Therefore, the wireless network and redundant resources in the terminal device can be released in time.

The embodiment of the present invention further provides a method for resource deletion, when the terminal switches from the source network to the target network, where the target network supports only one PDN connection under the APN; the packet data gateway is in the target wireless network for the APN. Establishing a PDN connection, deleting a PDN connection in the source network corresponding to the PDN connection; if the terminal establishes multiple PDN connections under the APN of the source wireless network, the packet data gateway further deletes the source network The terminal is connected to other PDNs under the APN.

Referring to FIG. 8, FIG. 8 is a flowchart of an exemplary method for resource deletion according to Embodiment 5 of the present invention. This embodiment mainly describes a source wireless network in which a terminal device establishes N PDNs (N>2) connected by an APN. (eg, 3GPP network, including E-UTRAN network, GERAN or UTRAN network, etc.) Move to a target wireless network that supports only one PDN connection for the APN (eg, a non-3GPP network, including a Wimax network, an HRPD network, or a WLAN network) Wait) . For example, by 3GPP networks (such as E-UTRAN network, GERAN or UTRAN network) and the interface protocol between the serving gateway and the packet data gateway uses GTP to move to a non-3GPP network (such as Wimax network, HRPD network or WLAN network, etc.) and move The interface protocol between the access gateway and the packet data gateway uses PMIP, where the N-1 PDN connections are released in the source wireless network, and the method process includes the following steps:

561. The terminal device discovers and selects a mobile access gateway in the target wireless network.

562. The mobile access gateway authenticates the terminal device by using a charging authentication authentication server.

563. The terminal device sends an attach request to the mobile access gateway.

564. The mobile access gateway sends a Proxy Binding Update message to the packet data gateway. The proxy binding request message carries the APN.

565. The packet data gateway uses the charging authentication authentication server to sign a subscription to a home location. The subscriber server updates the address information of the packet data gateway.

S66. The packet data gateway establishes a PDN connection under the APN, and the packet data gateway sends a proxy binding acknowledgement message (Proxy Binding Ack) to the mobile access gateway.

S67. The mobile access gateway interacts with the terminal device to notify that the attach is complete.

568. The packet data gateway initiates a bearer deletion process in the source wireless network, and deletes other N-1 PDN connections in the APN. For example, the packet data gateway discovers an APN in the target wireless network. Supporting a PDN connection (eg, the packet data gateway discovers that the interface protocol between the mobile access gateway and the packet data gateway in the target wireless network is PMIP)). The packet data gateway sends a Delete Bearer Request message to the serving gateway for each PDN connection that needs to be deleted (the other N-1 PDN connections).

569. After receiving the delete bearer request message, the serving gateway sends a delete bearer request message to the mobility management network element (for example, the MME or the SGSN).

S610. The mobility management network element sends a delete bearer response message (Delete Bearer Response) to the serving gateway after receiving the delete bearer request message.

S611. The serving gateway sends a delete bearer response message to the packet data gateway after receiving the delete bearer request message.

Referring to FIG. 9, FIG. 9 is a flowchart of an exemplary method for deleting a resource according to Embodiment 5 of the present invention. This embodiment mainly describes that a terminal device is in the source wireless network (for example, a 3GPP network, including an E-UTRAN network). , GERAN or UTRAN network, etc.) establish N PDN (N>2) connections for one APN, and the terminal device is in the target wireless network (eg, non-3GPP network, including Wimax network, HRPD network or WLAN network, etc.) Establishing a PDN connection for the APN, the target wireless network only supports establishing one PDN connection for the APN (eg, the target wireless network is a non-3GPP network, such as a Wimax network, an HRPD network, or a WLAN network, etc., and the mobile Interface between the access gateway and the packet data gateway The protocol uses PMIP), wherein N-1 PDNs are connected to the source wireless network, and the method process includes the following steps:

571. The terminal device sends a PDN connection setup request message to the mobile access gateway.

572. The mobile access gateway sends a Proxy Binding Update message to the packet data gateway. The proxy binding request message carries the APN.

573. The packet data gateway updates the address information of the packet data gateway to the home subscription user server by using the charging authentication authentication proxy server.

574. The packet data gateway establishes a PDN connection under the APN, and the packet data gateway sends a proxy binding acknowledgement message (Proxy Binding Ack) to the mobile access gateway.

575. The mobile access gateway returns the established PDN connection information to the terminal device. S76. The packet data gateway initiates a bearer deletion process, and the other N-1 PDNs under the APN are deleted in the source wireless network. For example, the packet data gateway finds that an APN in the target wireless network only supports a PDN connection (eg, the packet data gateway discovers an interface protocol between the mobile access gateway and the packet data gateway in the target wireless network as PMIP)). The packet data gateway sends a Delete Bearer Request message to the serving gateway for each PDN connection that needs to be deleted (the other N-1 PDN connections).

577. After receiving the delete bearer request message, the serving gateway sends a delete bearer request message to the mobility management network element (for example, the MME or the SGSN).

578. After receiving the delete bearer request message, the mobility management network element sends a Delete Bearer Response message to the serving gateway.

579. The serving gateway sends a delete bearer response message to the packet data gateway after receiving the delete bearer request message.

Under the condition that the source wireless network and the terminal device have established N PDN connections for the APN, N≥2, if the terminal device is in the target wireless network for the The APN establishes a PDN connection, and the target wireless network only supports establishing a PDN connection for the APN, and the packet data gateway initiates a bearer deletion process to delete other N-1 PDNs in the source wireless network, so that the Releasing redundant resources within the source wireless network.

Referring to FIG. 6A, FIG. 6A is a schematic diagram of a function of a control device 6 according to an embodiment of the present invention. The control device 6 may be a mobility management network element or a mobile access gateway, and the control device 6 includes:

The receiving unit 61 is configured to receive a first connection request sent by the terminal device.

The obtaining unit 62 is configured to acquire an access point name APN according to the first connection request received by the receiving unit 61.

If the APN is carried in the first connection request, the acquiring unit 62 acquires the APN from the first connection request. If the APN is not carried in the first connection request, the acquiring unit 62 is configured according to the The first connection request allocates the APN to the terminal device.

The sending unit 63 is configured to send, to the terminal device, the indication information, where the indication information is used to instruct the terminal device to determine, according to the indication information, whether the APN obtained by the acquiring unit 62 sends two to the wireless network. The above PDN connection request.

The indication information includes information about the number of PDN connections established by the wireless network for the APN or protocol type information supported by the wireless network for the APN, where the wireless network supports establishing the number of PDN connections for the APN. The information includes that the wireless network supports establishing one PDN connection or two or more PDN connections for the APN, and the protocol type information supported by the wireless network for the APN includes the wireless network supporting the GPRS tunneling protocol, referred to as GTP protocol or proxy mobile. Internet Protocol PMIP Agreement.

Optionally, if the wireless network is configured to support establishing one PDN connection for the APN to support establishing more than two PDN connections or the wireless network is supported by the ANP for establishing more than two PDN connections, a PDN connection, the sending unit 63 is further configured to send the indication update information to the terminal device, where the indication update information is used to instruct the terminal device to determine, according to the indication update information, whether the APN is directed to the wireless network. Send two The above PDN connection request. The indication update information includes the number of PDN connection establishment information supported by the wireless network for the APN or the protocol type information supported by the wireless network for the APN, and the number of PDN connections established by the wireless network for the APN is supported. The information includes supporting the establishment of a PDN connection or supporting the establishment of two or more PDN connections, and the protocol type information supported by the wireless network for the APN includes supporting the GTP protocol or supporting the PMIP protocol.

Referring to FIG. 6B, FIG. 6B is a schematic diagram of a function of a control device 6 according to an embodiment of the present invention. The control device 6 includes not only a receiving unit 61, an obtaining unit 62, and a sending unit 63, but the control device 6 further includes a releasing unit 64. Under the condition that the wireless network establishes N PDN connections for the APN acquired by the acquiring unit 62, the N≥2, if the wireless network supports the establishment of two or more PDN connections for the APN, A PDN connection is established, and the release unit 64 is configured to release N-1 PDN connections among the N PDN connections.

Referring to FIG. 7A, FIG. 7A is a schematic diagram of functions of a terminal device 7 according to an embodiment of the present invention. The terminal device 7 includes:

The sending unit 71 is configured to send a first connection request to the wireless network. The wireless network acquires an access point name APN according to the first connection request.

The receiving unit 72 is configured to receive the indication information that is sent by the wireless network, where the indication information is used to indicate that the terminal device determines, according to the indication information, whether the APN corresponding to the first connection request sends two to the wireless network. The above PDN connection request. The indication information includes information about the number of PDN connections established by the wireless network for the APN or protocol type information supported by the wireless network for the APN. The wireless network supporting the APN to establish the PDN connection number information includes supporting establishing a PDN connection or supporting establishing two or more PDN connections, and the protocol type information supported by the wireless network for the APN includes supporting the GTP protocol or supporting the PMIP. protocol.

The determining unit 73 is configured to determine, according to the indication information received by the receiving unit 72, whether to send two or more PDN connection requests to the wireless network for the APN.

If the indication information includes the wireless network establishing a PDN for the APN support The connection or the wireless network supports PMIP protocol information for the APN, and the determining unit 73 is configured to determine, according to the indication information, that two or more PDN connection establishment requests are not sent to the wireless network for the APN; The indication information includes that the wireless network supports establishing two or more PDN connections for the APN, or the wireless network supports GTP protocol information for the APN, and the determining unit 73 is configured to determine, according to the indication information, that the APN is Sending more than two PDN connection establishment requests to the wireless network.

Optionally, the receiving unit 72 is further configured to receive indication update information of the wireless network, where the indication update information is used to instruct the terminal device to determine, according to the indication update information, whether the APN is directed to the wireless The network sends more than two PDN connection requests. The indication update information includes the number of PDN connection establishment information supported by the wireless network for the APN or the protocol type information supported by the wireless network for the APN, and the number of PDN connections established by the wireless network for the APN is supported. The information includes supporting the establishment of a PDN connection or supporting the establishment of two or more PDN connections, and the protocol type information supported by the wireless network for the APN includes supporting the GTP protocol or supporting the PMIP protocol.

The determining unit 73 is further configured to determine, according to the indication update information, whether to send two or more PDN connection requests to the wireless network for the APN. If the indication update information includes that the wireless network supports establishing a PDN connection for the APN or the wireless network supports the PMIP protocol for the APN, the terminal device determines, according to the indication update information, that the APN is Not transmitting more than two PDN connection requests to the wireless network; or if the indication update information includes the wireless network supporting establishment of more than two PDN connections for the APN or the wireless network supporting the GTP protocol for the APN And the terminal device determines, according to the indication update information, that two or more PDN connection requests are sent to the wireless network for the APN.

Referring to FIG. 7B, FIG. 7B is a schematic diagram of a function of a terminal device 7 according to an embodiment of the present invention. The terminal device 7 includes not only a sending unit 71, a receiving unit 72, and a determining unit 73, but the terminal device 7 further includes a releasing unit 74. The terminal device establishes N PDN connections for the APN And the condition that the indication update information received by the receiving unit 72 includes that the wireless network supports establishing a PDN connection for the APN or the wireless network supports a PMIP protocol for the APN. Information, the release unit is configured to release N-1 PDN connections in the N PDN connections.

FIG. 10 is a schematic structural diagram of a packet data gateway according to Embodiment 5 of the present invention, where the packet data gateway 10 includes an establishing unit 101, a deleting unit 102, and a determining unit 103, when the terminal switches from the source network to the When only one PDN is connected to the target network, the establishing unit 101 is configured to establish a PDN connection for the APN in the target wireless network.

The deleting unit 102 is configured to delete a PDN connection in a source network corresponding to the PDN connection;

The determining unit 103 is configured to determine, if the terminal establishes multiple PDN connections under the APN of the source wireless network, if yes,

Then, the deleting unit 103 further deletes the PDN connection of the terminal in the source network under the APN.

The deleting unit 103 deletes other PDN connections of the terminal in the source network under the APN, and specifically deletes other PDN connections by using a bearer deletion process. One of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the above-described embodiments can be accomplished by a program instructing the associated hardware, which can be stored in a computer readable storage medium. The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

The information transmission method, device and system provided by the present invention are described in detail by using the embodiments. For those skilled in the art, the embodiments of the present invention may be changed in the specific implementation manner and application scope. In the above, the contents of the specification are not to be construed as limiting the invention.

Claims

Claim

A method for deleting a resource, the method comprising:

When the terminal switches from the source network to the target network, where the target network supports only one PDN connection under the APN;

The packet data gateway establishes a PDN connection for the APN in the target wireless network, and deletes the PDN connection in the source network corresponding to the PDN connection;

If the terminal establishes a plurality of PDN connections under the APN of the source wireless network, the packet data gateway further deletes other PDN connections of the terminal in the source network under the APN.

The method for deleting a resource according to claim 1, wherein the deleting the PDN connection in the source network by the packet data gateway is: the packet data gateway deleting the other PDN connection by using a bearer deletion process.

The method for deleting a resource according to claim 2, wherein the packet data gateway deletes another PDN connection by using a bearer deletion process, specifically: between the packet data gateway and the mobile access gateway. When the interface protocol is PMIP, the packet data gateway sends a delete bearer request message to the serving gateway for each PDN connection that needs to be deleted.

4. An information delivery method, characterized in that the method comprises:

Receiving, by the wireless network, a first connection request sent by the terminal device;

Obtaining, according to the first connection request, the wireless network, an access point name APN;

The wireless network sends the indication information to the terminal device, where the indication information is used to instruct the terminal device to determine, according to the indication information, whether to send two or more PDN connection requests to the wireless network for the APN.

The information transmission method according to claim 4, wherein the indication information includes the number of PDN connection establishment information supported by the wireless network for the APN or the protocol type supported by the wireless network for the APN. information.

The information transmission method according to claim 4 or 5, wherein the transmitting, by the wireless network, the indication information to the terminal device comprises: The wireless network sends the indication information to the terminal device by using an authentication authentication message; or, the wireless network sends the indication information to the terminal device by using an attach accept message;

Or the wireless network sends the indication information to the terminal device by using an attach complete message;

Or the wireless network sends the indication to the terminal device by using a bearer setup request message, or the wireless network sends the indication information to the terminal device by using a PDN connection establishment reject message;

Alternatively, the wireless network sends the indication information to the terminal device by returning a new PDN connection information message bearer setup request message.

7. The information delivery method according to claim 4, wherein if the wireless network supports establishing a PDN connection for the port, the connection is established to support establishing more than two PDN connections or the wireless network is for the Supporting the establishment of two or more PDN connections becomes support for establishing a PDN connection, and the method further includes:

The wireless network sends the indication update information to the terminal device, where the indication update information is used to instruct the terminal device to determine, according to the indication update information, whether to send two or more PDN connection requests to the wireless network. .

The information transmission method according to claim 4, wherein, under the condition that the wireless network establishes a PDN connection for the UI, the Ν ≥ 2, if the wireless network is for the ΑΡΝ Supporting the establishment of two or more PDN connections becomes support for establishing a PDN connection, and the method further includes:

The wireless network releases N-1 PDN connections in the one PDN connection.

9. A control device, characterized in that the control device comprises:

a receiving unit, configured to receive a first connection request sent by the terminal device;

An acquiring unit, configured to acquire an access point according to the first connection request received by the receiving unit Name APN;

a sending unit, configured to send, to the terminal device, the indication information, where the indication information is used to indicate, according to the indication information, whether the APN obtained by the acquiring unit sends two to the wireless network. The above PDN connection request.

The control device according to claim 9, wherein the indication information comprises that the wireless network supports establishment of a PDN connection number information for the APN or protocol type information supported by the wireless network for the APN. .

11. The control device according to claim 9, wherein if the wireless network is configured to support establishing one PDN connection for the APN to support establishing more than two PDN connections or the wireless network is configured for the APN by Supporting the establishment of two or more PDN connections to support the establishment of a PDN connection, the sending unit is further configured to send the indication update information to the terminal device, where the indication update information is used to instruct the terminal device to update the information according to the indication. Determining whether two or more PDN connection requests are sent to the wireless network for the APN.

The control device according to claim 9, wherein the control device further includes a release unit, where the wireless network establishes N PDN connections for the APN, the N≥2, if The wireless network is configured to support establishing two PDN connections for the APN to support establishing one PDN connection, and the release unit is configured to release N-1 PDN connections in the N PDN connections, and notify the Sending unit.

The control device according to any one of claims 9 to 12, wherein the control device comprises a mobility management network element or a mobile access gateway.

A terminal device, the terminal device comprising:

a sending unit, configured to send a first connection request to the wireless network;

a receiving unit, configured to receive the indication information that is sent by the wireless network, where the indication information is used to indicate, according to the indication information, whether the APN corresponding to the first connection request is sent to the wireless network by using two or more PDN connection request;

a determining unit, configured to determine, according to the indication information received by the receiving unit, the APN Whether to send more than two PDN connection requests to the wireless network.

The terminal device according to claim 14, wherein the indication information comprises that the wireless network supports establishment of a PDN connection number information for the APN or protocol type information supported by the wireless network for the APN. The wireless network supports the establishment of the PDN connection number information for the APN, including supporting the establishment of a PDN connection or supporting the establishment of two or more PDN connections, and the protocol type information supported by the wireless network for the APN includes supporting the GTP protocol or supporting. PMIP agreement.

The terminal device according to claim 15, wherein if the indication information includes that the wireless network supports establishing a PDN connection for the APN, or the wireless network supports PMIP protocol information for the APN, Determining, by the determining unit, determining, according to the indication information, whether the APN sends two or more PDN connection requests to the wireless network, includes:

The determining unit is configured to determine, according to the indication information, that two or more PDN connection establishment requests are not sent to the wireless network for the APN.

The terminal device according to claim 14, wherein the receiving unit is further configured to receive indication update information of the wireless network, where the indication update information includes that the wireless network supports establishing a PDN for the APN. The connection number information or the protocol type information supported by the wireless network for the APN, the wireless network supporting the establishment of the PDN connection number information for the APN includes supporting establishing a PDN connection or supporting establishing two or more PDN connections. The protocol type information supported by the wireless network for the APN includes supporting the GTP protocol or supporting the PMIP protocol.

The terminal device according to claim 17, wherein the terminal device further includes a release unit, where N≥2, if the terminal device establishes N PDN connections for the APN, The indication update information includes information that the wireless network supports establishing a PDN connection for the APN or the wireless network supports a PMIP protocol for the APN, and the release unit is configured to release N of the N PDN connections. - 1 PDN connection.

A packet data gateway, comprising: an establishing unit, a deleting unit, and a determining unit, when the terminal switches from the source network to support only one PDN connection target network under the APN,

The establishing unit is configured to establish a PDN connection for the APN in the target wireless network;

The deleting unit is configured to delete a PDN connection in the source network corresponding to the PDN connection, and the determining unit is configured to determine, if the terminal establishes multiple PDN connections in the APN of the source wireless network, if yes ,

Then, the deleting unit is further configured to delete other PDN connections of the terminal in the source network under the APN.

20. The packet data gateway of claim 19, wherein the deleting unit deletes other PDN connections by a bearer deletion procedure.