WO2017045455A1

WO2017045455A1 - Data transmission method, packet data network gateway, and serving gateway

Info

Publication number: WO2017045455A1
Application number: PCT/CN2016/087479
Authority: WO
Inventors: 吴再达
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-16
Filing date: 2016-06-28
Publication date: 2017-03-23
Also published as: CN106550406B; CN106550406A

Abstract

A data transmission method, a packet data network gateway, and a serving gateway. The method comprises: determining internal user context according to downlink data sent by a network side, the downlink data comprising at least one packet; determining that a flag in the internal user context has been set, and storing the downlink data into a buffer unit, the flag in the user context being set to instruct to discard downlink data exceeding a buffering capacity when the buffer unit of a packet data network gateway (PGW) is full; before paging for a user is initiated, sending only the first packet in the downlink data to a serving gateway (SGW), the first packet being used for paging the user, and the first packet being not charged; and after the paging for the user succeeds, sending a downlink data packet in the buffer unit to the SGW, the downlink data packet sent to the SGW being charged.

Description

Data transmission method, packet data network gateway and service gateway

Technical field

This document relates to, but is not limited to, the field of EPC networks of 4G mobile communication systems, and more particularly to a data transmission method, a packet data network gateway and a service gateway.

Background technique

Users (UE, User Equipment) in the 4G core network (EPC, Evolved Packet Core) are generally permanently online, but the user does not perform data services all the time. The radio spectrum resource is limited. In order to ensure that the radio resource is used effectively, the evolved base station (eNodeB, Evolved NodeB) notifies the Mobility Management Entity (MME) to release the S1 connection, and the MME sends the MME. Release the access bearer request Release Access Bearer Request message to the Serving Gateway (SGW, Serving Gateway), and the user enters the idle state.

After the UE enters the idle state, the user cannot perform data services. At this time, there are two ways to exit the idle state and restore the connection state. The first method is that the UE initiates the data service and restores the S1U tunnel. After the eNodeB reestablishes the S1 connection, the eNodeB notifies the MME to initiate a service request service request process, and the MME sends a modify bearer request. The Modify Bearer Request message is used to restore the S1U link to the SGW. The second method is that the downlink data is sent to the UE on the network side, and the UE is found to be in an idle state. The SGW temporarily buffers the downlink data and sends the downlink data to notify the Downlink Data Notification message to the MME. The MME triggers a paging procedure for the UE, and reestablishes the S1 connection after the paging succeeds. However, due to the limitation of the number of users and the network capacity, the SGW's caching capability is not strong. It is not guaranteed to cache all the packets. When the SGW is cached, the data packets will be discarded.

Under the 4G network, with the development of smart phones, various applications are more and more, and various push messages are often sent to the UE, which often triggers the downlink data paging process. If the paging time on the network side is long and the downlink data traffic is large, the SGW will discard the packet if it exceeds the buffering capability of the SGW. In the EPC charging mode, the bill traffic is mainly charged by the PGW. The packet data network gateway (PGW, PDN GateWay) discarded by the SGW is not known and will be normally counted in the user traffic. Causes multiple billing.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the present invention provides a data transmission method, a packet data network gateway, and a service gateway, which can prevent the PGW from charging more than the discarded downlink data in the process of triggering the paging of the downlink data in the network side.

The technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a data transmission method, where the data transmission method includes:

Determining an internal user context according to downlink data sent by the network side, where the downlink data includes at least one packet;

Determining that the flag in the internal user context has been set, placing the downlink data into a cache unit, and the flag in the user context is set to indicate that when the PGW cache unit is full, the downlink is beyond the buffering capability. Data discarding;

Before initiating paging to the user, transmitting only the first message in the downlink data to the serving gateway SGW, the first message is used for paging to the user, and the first report is sent The text is not billed;

After the user is successfully paged, the downlink data packet of the buffer unit is sent to the SGW, and the downlink data packet sent to the SGW is charged.

Optionally, when the user is idle, the data transmission method further includes:

Receiving a release access bearer request message sent by the SGW, setting a flag in the internal user context;

Sending an release access bearer response message to the SGW.

Optionally, the method further includes: during initiating paging to the user,

Receiving the downlink data sent by the network side;

When the downlink data exceeds the buffer unit capability, it is determined that the internal context flag is set, the downlink data exceeding the buffer unit capability is discarded, and the discarded downlink data is not charged.

Optionally, after the user is successfully paged, the data transmission method further includes:

Receiving a modify bearer request message sent by the SGW, and clearing a flag in the internal user context;

Sending a modify bearer response message to the SGW.

An embodiment of the present invention further provides a data transmission method, where the data transmission method includes:

Receiving the first packet in the downlink data sent by the packet data network gateway PGW, determining that the serving gateway SGW does not perform data packet buffering, and discarding the first packet in the downlink data;

Sending a downlink data notification message to the mobility management entity MME, where the downlink data notification message is used to indicate that paging is initiated to the user.

Receiving a release access bearer request message sent by the MME;

And sending the release access bearer request message to the PGW, where the release access bearer request message is used by the PGW to determine that the user is in an idle state;

Receiving a release access bearer response message sent by the PGW.

Receiving a modify bearer request message sent by the MME;

And sending the modify bearer request message to the PGW, where the modify bearer request message is used to indicate that the flag in the internal user context is cleared;

Receiving a modified bearer response message sent by the PGW;

Sending the modify bearer response message to the MME;

Receiving the downlink data sent by the PGW, and sending the downlink data to the user by using a base station.

The embodiment of the invention further provides a packet data network gateway, where the packet data network gateway includes:

The determining unit is configured to determine an internal user context according to the downlink data sent by the network side, where the downlink data includes at least one packet, and determine that the identifier in the internal user context is set Bits, the downlink data is placed in the cache unit; the flag in the user context is set to indicate that the downlink data that exceeds the buffering capability is discarded when the PGW buffer unit is full;

The sending unit is configured to send only the first packet of the downlink data to the serving gateway SGW before initiating paging to the user, where the first packet is used for paging to the user, and The first packet is not charged; after the user is successfully paged, the downlink data packet of the buffer unit is sent to the SGW, and the downlink data packet sent to the SGW is charged;

a receiving unit, configured to receive the downlink data sent by the network side;

The buffer unit is configured to store a downlink data message.

Optionally,

The receiving unit is further configured to receive a release access bearer request message sent by the SGW, and set a flag in the internal user context;

The sending unit is further configured to send a release access bearer response message to the SGW.

Optionally, the determining unit is further configured to: when the downlink data exceeds the buffer unit capability, in the paging process for the user, determine that the internal context flag is set, and the cache is exceeded. The downlink data of the unit capability is discarded, and the downlink data that is discarded is not charged.

Optionally, the receiving unit is further configured to: after the paging of the user is successful, receive a modify bearer request message sent by the SGW, and clear the flag in the internal user context;

The sending unit is further configured to send a modify bearer response message to the SGW.

The embodiment of the present invention further provides a service gateway, where the service gateway includes: the receiving unit, configured to receive a first packet in the downlink data sent by the packet data network gateway PGW;

The determining unit is configured to determine that the serving gateway SGW does not perform data packet buffering, and discards the first packet in the downlink data;

The sending unit is configured to send a downlink data notification message to the mobility management entity MME, where the downlink data notification message is used to indicate that paging is initiated to the user.

Optionally, the receiving unit is further configured to receive a release access bearer request message sent by the MME, and receive a release access bearer response message sent by the PGW;

The sending unit is further configured to send the release access bearer request message to the PGW, where the release access bearer request message is used by the PGW to determine that the user is in an idle state.

Optionally, the receiving unit is configured to: after the paging of the user is successful, receive a modify bearer request message sent by the MME; receive a modify bearer response message sent by the PGW; and receive the Downstream data;

The sending unit is further configured to send the modify bearer response message to the MME, and send the modify bearer request message to the PGW, where the modify bearer request message is used to indicate that the identifier in the internal user context is to be Cleared; the downlink data is sent to the user by the base station.

The embodiment of the present invention provides a data transmission method, a packet data network gateway, and a service gateway, and determines an internal user context according to downlink data sent by the network side, where the downlink data includes at least one packet, and determines the internal user context. The flag is set, the downlink data is placed in the buffer unit, and the first message in the downlink data is sent to the serving gateway SGW. The data transmission method, the packet data network gateway and the service gateway provided by the embodiments of the present invention, when the user enters the idle state, the SGW notifies the PGW, the PGW setting flag is set, and the subsequent PGW receives the downlink data to notify the SGW to trigger the paging process, and the PGW determines. The flag is set, the downlink data is buffered or discarded, and the discarded downlink data is not charged. This prevents the SGW from notifying the PGW of the discarded downlink data, so that the PGW can charge more for the discarded downlink data.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

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

2 is a second schematic flowchart of a data transmission method according to an embodiment of the present invention;

3 is a schematic flowchart 3 of a data transmission method according to an embodiment of the present invention;

4 is a schematic flowchart 4 of a data transmission method according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart 5 of a data transmission method according to an embodiment of the present disclosure;

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

FIG. 7 is a schematic structural diagram of a packet data network gateway according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a service gateway according to an embodiment of the present invention.

Embodiments of the invention

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

Embodiment 1

An embodiment of the present invention provides a data transmission method. As shown in FIG. 1 , the data transmission method may include:

Step 101: Determine an internal user context according to downlink data sent by the network side, where the downlink data includes at least one packet.

It should be noted that the execution entity of the data transmission method provided by the embodiment of the present invention is a packet data network gateway PGW.

The PGW receives downlink data sent by the network side, where the downlink data includes at least one packet, the packet carries an IP address, and the PGW determines an internal user context according to the IP address. The downlink data sent by the network side is sent to the PGW through a single message.

The message is a data unit exchanged and transmitted in the network, that is, a data block to be sent by the station at one time. The message contains the complete data information to be sent, the length of which can be inconsistent, the length is not limited and variable.

Step 102: Determine that a flag in the internal user context has been set, put the downlink data into a PGW cache unit, and set a flag in the user context to indicate that when the PGW cache unit is full, the pair is exceeded. Downstream data discarding of the cache capability.

Step 103: Before initiating paging to the user, send only the first packet in the downlink data to the serving gateway SGW, where the first packet is used for paging to the user, and the foregoing A message is not billed.

The PGW sends the first packet of the downlink data to the SGW, but the first packet of the downlink data remains in the PGW buffer unit. The first packet of the downlink data is sent to the SGW for triggering paging to the user; if the downlink data has multiple packets, other than the first packet The message does not need to be sent to the SGW. The PGW stores the downlink data packet in the PGW buffer unit. If the PGW buffer is full, the data packet is discarded. The discarded packet does not participate in the accounting.

In the data transmission method provided by the embodiment of the present invention, when the user enters the idle state, the SGW notifies the PGW, the PGW setting flag is set, and the subsequent PGW receives the downlink data to notify the SGW to trigger the paging process, and the PGW determines that the flag has been set, and the downlink data is set. Cache or discard, the dropped downlink data is not charged.

S104: After the user is successfully paged, the downlink data packet of the buffer unit is sent to the SGW, and the downlink data packet sent to the SGW is charged.

In the related art, the PGW does not buffer the data packet, and the received data packet is forwarded to the SGW, and the forwarded packet is charged. Therefore, the PGW does not know the packet discarded by the SGW, and the packet will be discarded by the SGW. The text is normally counted in the user traffic, resulting in multiple billing situations. The technical solution provided by the embodiment of the present invention buffers the downlink data packet by the PGW, and the PGW can discard the discarded data packet, and the discarded data packet does not participate in the charging, thereby avoiding the situation that the user is charged more.

Embodiment 2

An embodiment of the present invention provides a data transmission method. As shown in FIG. 2, the data transmission method may include:

Step 201: Receive a first packet in the downlink data sent by the packet data network gateway (PGW), and the serving gateway SGW does not perform data packet buffering, and discards the first packet in the downlink data.

It should be noted that the execution entity of the data transmission method provided by the embodiment of the present invention is an SGW.

The SGW receives the first packet in the downlink data sent by the PGW, and discards the first packet in the received downlink data. The downlink data includes at least one packet.

Step 202: Send a downlink data notification message to the mobility management entity MME, where the downlink data notification message is used to indicate that paging is initiated to the user.

Optionally, the SGW sends a downlink data notification message to the mobility management entity MME, and the MME sends a paging to the eNodeB, where the eNodeB triggers a paging process for the user, due to wireless (eg, signal instability) or the terminal itself (eg, the user temporarily Located in the shielded area, it may cause a long paging time, and the network side cannot control it at this time.

Embodiment 3

An embodiment of the present invention provides a data transmission method, where the data transmission method may include:

As shown in FIG. 3, after the UE is attached to the EPC network, the data service is not performed for a period of time, that is, when the user is idle, the base station eNodeB releases the radio resource, and initiates the S1 connection release process:

Step 301: The eNodeB sends an S1 connection release request message to the MME.

Step 302: The MME receives the S1 connection release request message sent by the eNodeB, and sends a release access bearer request message to the SGW.

Step 303: The SGW sends the release access bearer request message to the PGW, so that the PGW determines that the user is in an idle IDLE state.

Optionally, the SGW receives the release access bearer request message, and indicates that the user is in an idle state, and sends the release access bearer request message to the PGW, and the PGW receives the release access bearer request message, and determines that the user is in the IDLE state. The SGW itself sets a configuration switch, and according to the switch decision, it is required to forward the release access bearer request message to the PGW. For example, when the configuration switch is turned on, the release access bearer request message is sent to the PGW; when the configuration switch is turned off, the release access bearer request message is not sent to the PGW.

Step 304: After receiving the release access bearer request message, the PGW sets the flag in an internal user context.

The PGW sets the flag in the internal user context for subsequent charging judgment of the discarded downlink data, that is, when the flag in the internal user context is already set, the downlink data exceeding the buffering capability is discarded.

Step 305: The PGW sends a release access bearer response message to the SGW.

Step 306: The SGW sends the release access bearer response message to the MME.

Step 307: The MME sends an S1 connection release command to the eNodeB.

Step 308: The eNodeB sends an RRC connection release message to the UE.

Step 309: The eNodeB sends an S1 connection release complete message to the MME.

As shown in FIG. 4, after the user enters the idle state, the push message or other downlink data sent by the network to the user reaches the PGW, and the PGW determines that the flag has been set, triggering the subsequent process:

Step 401: The PGW receives the downlink data sent by the network side, where the downlink data carries an IP address, and the internal user context is determined according to the IP address, where the downlink data includes at least one packet.

Step 402: The PGW determines that the flag in the internal context has been set, and places the received downlink data into the cache unit.

Step 403: The PGW sends the first packet in the downlink data to the SGW.

The first packet in the downlink data is still in the buffer unit, that is, the first packet in the downlink data is not discarded, and the first packet in the downlink data is not performed. Billing.

Step 404: The SGW sends a downlink data notification message to the MME, where the downlink data notification message is used to indicate that paging is initiated to the user.

Optionally, after receiving the first packet in the downlink data sent by the PGW, the SGW determines that the SGW self-configuration switch is enabled, discards the first packet in the received downlink data, and sends a downlink data notification message to the SGW. MME.

Step 405: The SGW receives a downlink data notification response message sent by the MME.

Step 406: The MME sends a paging message to the base station eNodeB.

Optionally, the MME sends a paging message to the eNodeB, and the eNodeB triggers paging to the user. In the paging process, due to wireless (for example, signal instability) or the user terminal itself (for example, the user is temporarily located in the shielding area), This may result in a long paging time, which cannot be controlled on the network side.

Step 407: The PGW receives the downlink data sent by the network side.

Optionally, the paging user time is uncontrollable, and the downlink data traffic sent by the network to the terminal is not controllable. In the process of initiating paging to the user by the network side, the PGW receives the downlink data sent by the network side.

Step 408: When the PGW receives the downlink data exceeding the buffer unit capability, determining that the internal context flag is set, discarding the downlink data that exceeds the buffer unit capability, and not counting the discarded downlink data. fee.

Optionally, in the process of initiating a paging to the user on the network side, when the PGW receives the downlink data traffic exceeding the buffer unit capability, the downlink data that exceeds the buffer unit capability according to the existing policy is selected. Discarding; when the PGW discards the downlink data that exceeds the capability of the buffer unit, it is determined that the internal context flag is set, the downlink data that is discarded is not charged, and the discarded downlink data is not sent to SGW.

Step 409: After the user successfully clicks, initiate a service request process.

Step 410: In the service request process, the MME sends a modify bearer request message to the SGW.

Step 411: The SGW determines that the configuration switch is open, and sends the modify bearer request message to the PGW.

Step 412: The PGW receives the modify bearer request message sent by the SGW, clears the flag in the internal user context, and sends a modify bearer response message to the SGW.

Step 413: The SGW receives the modify bearer response message, and sends the modify bearer response message to the MME.

Step 414: The PGW sends the downlink data in the buffer unit to the SGW, and the SGW forwards the message to the UE through the eNodeB.

Optionally, in step 412, after the PGW sends the modify bearer response message to the SGW, the PGW immediately sends the downlink data in the buffer unit to the SGW, and the SGW forwards the data to the UE through the eNodeB.

Step 415: The UE and the network side start a normal data service interaction process.

In the data transmission method provided by the embodiment of the present invention, when the user enters the idle state, the SGW notifies the PGW, the PGW setting flag is set, and the subsequent PGW receives the downlink data to notify the SGW to trigger the paging process, and the PGW determines that the flag has been set, and the downlink data is set. Cache or discard, the discarded downlink data is not charged, and the SGW is not able to notify the PGW of the discarded downlink data, so that the PGW charges more for the discarded downlink data.

Embodiment 4

The data transmission method provided by the embodiment of the present invention can be applied to the following scenarios:

When the user is in the idle state, the paging process is triggered by the downlink data on the network side, and the paging time is too long. In the paging process of the network side, the traffic of the downlink data may exceed the buffering capability of the network side, and the scenario of discarding the downlink data occurs. As shown in FIG. 5, the data transmission method may include:

Step 501: The UE initiates attaching, and the MME, the SGW, and the PGW are given according to the process of the related technology. The UE allocates an IP address and establishes a GPRS Tunneling Protocol (GTP).

Optionally, as shown in FIG. 6, the UE initiates an attach to the base station eNodeB, and the eNodeB sends an attach request message to the MME, where the MME receives the attach request message, sends a create session request message to the SGW, and the SGW sends the create session request message to The PGW, the PGW receives the create session request message, and sends a create session response message to the SGW, and the SGW sends the create session response message to the MME, and the MME sends an attach accept message to the eNodeB.

Step 502: The base station eNodeB detects that the user is in an idle state, releases the wireless air interface resource, and releases the S1 connection, and the MME sends a release access bearer request Release Access Bearer Request message to the SGW.

Step 503: After receiving the Release Access Bearer Request message, the SGW marks the user in an idle state, and sends the Release Access Bearer Request message to the PGW according to the context information saved by the SGW.

The SGW itself sets a configuration switch, and according to the switch decision, it is required to forward the release access bearer request message to the PGW. For example, when the configuration switch is turned on, the release access bearer request message is sent to the PGW; when the configuration switch is turned off, the release access bearer request message is not sent to the PGW.

Step 504: After receiving the Release Access Bearer Request message, the PGW sets the flag in the internal user context.

The PGW sets the flag in the internal user context for the subsequent charging judgment of the user to the discarded downlink data, that is, when the flag in the internal user context is already set, the downlink data exceeding the buffering capability is discarded.

Step 505: The PGW receives the downlink data sent by the network side, determines that the identifier in the internal user context is set, and sends the first packet in the downlink data to the SGW.

Optionally, the downlink data includes at least one packet. The PGW caches the downlink data packet sent by the subsequent network side. After the received downlink data exceeds the buffering capability, the PGW discards the downlink data that exceeds the capability of the buffer unit. Because the internal context flag is set, the discard is discarded. The downlink data is not charged.

Step 506: The SGW receives the first message in the downlink data sent by the PGW. The downlink data paging process is triggered according to the related art process, and the downlink data is sent to notify the Downlink Data Notification message to the MME.

Optionally, the SGW caches only the first packet because the other packets of the downlink data are buffered or discarded by the PGW, and the buffering capability is not exceeded regardless of the paging time.

Step 507: The MME pages the user successfully, and sends a modify bearer request Modify Bearer Request message to the SGW. The SGW determines that the user exits the idle state, sends the Modify Bearer Request message to the PGW, and forwards the first packet. Give the UE.

Step 508: After receiving the Modify Bearer Request message, the PGW clears the flag in the internal user context, and sends the downlink data in the buffer unit and the downlink data sent by the network side to the SGW, and the SGW forwards the message to the SGW through the eNodeB. The UE, the UE, and the network side start a normal data service interaction process.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.

Embodiment 5

The embodiment of the present invention provides a packet data network gateway. As shown in FIG. 7, the packet data network gateway includes: a determining unit 10, a sending unit 11, a receiving unit 12, and a buffer unit 13, wherein

The determining unit 10 is configured to determine an internal user context according to downlink data sent by the network side, where the downlink data includes at least one packet, determine that a flag in the internal user context has been set, and put the downlink data into a cache unit, wherein the flag in the user context is set to indicate that downlink data that exceeds the buffering capability is discarded when the PGW buffer unit is full;

The sending unit 11 is configured to send only the first packet in the downlink data to the serving gateway SGW before initiating paging to the user, where the first packet is used for paging to the user. And the billing is not performed on the first packet; after the user is successfully paged, the downlink data packet of the buffer unit is sent to the SGW, and the downlink data packet sent to the SGW is charged;

The receiving unit 12 is configured to receive downlink data sent by the network side;

The buffer unit 13 is configured to store a downlink data packet.

The receiving unit 12 is further configured to receive a release access bearer request message sent by the SGW, and set a flag in the internal user context;

The sending unit 11 is further configured to send a release access bearer response message to the SGW.

The determining unit 10 is further configured to: when receiving the downlink data beyond the cache unit capability in the paging process for the user, determining that the internal context flag is set, and the buffer unit capability is exceeded. The downlink data is discarded, and the downlink data that is discarded is not charged.

Optionally, the receiving unit 12 is further configured to: after the paging of the user is successful, receive a modify bearer request message sent by the SGW, and clear the flag in the internal user context;

The sending unit 11 is further configured to send a modify bearer response message to the SGW.

In practical applications, the determining unit 10, the transmitting unit 11, and the receiving unit 12 may be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field located on a packet data network gateway. Implementation of a programmable gate array (FPGA).

For an understanding of the packet data network gateway provided by the embodiment of the present invention, reference may be made to the description of the data transmission method in the first embodiment to the fourth embodiment, and details are not described herein again.

In the packet data network gateway provided by the embodiment of the present invention, when the user enters the idle state, the SGW notifies the PGW, the PGW setting flag is set, and the subsequent PGW receives the downlink data notification SGW to trigger the paging process, and the PGW determination flag is set, The downlink data is buffered or discarded, and the discarded downlink data is not charged. This prevents the SGW from notifying the PGW of the discarded downlink data, so that the PGW can charge more for the discarded downlink data.

Embodiment 6

The embodiment of the present invention provides a service gateway. As shown in FIG. 8, the service gateway includes: a receiving unit 20, a determining unit 21, and a sending unit 22;

The receiving unit 20 is configured to receive a first one of the downlink data sent by the packet data network gateway PGW;

The determining unit 21 is configured to: determine that the serving gateway SGW does not perform data packet buffering, and discards the first packet in the downlink data;

The sending unit 22 is configured to send a downlink data notification message to the mobility management entity MME, where the downlink data notification message is used to indicate that paging is initiated to the user.

Optionally, the receiving unit 20 is further configured to receive a release access bearer request message sent by the MME, and receive a release access bearer response message sent by the PGW;

The sending unit 22 is further configured to send the release access bearer request message to the PGW, where the release access bearer request message is used by the PGW to determine that the user is in an idle state.

Optionally, the receiving unit 20 is further configured to: after the paging of the user succeeds, receive a modify bearer request message sent by the MME; receive a modify bearer response message sent by the PGW; and receive the PGW sending The downlink data;

The sending unit 22 is further configured to send the modify bearer response message to the MME, and send the modify bearer request message to the PGW, where the modify bearer request message is used to indicate that the internal user context is to be The flag is cleared; the downlink data is sent to the user by the base station.

In practical applications, the receiving unit 20, the determining unit 21, and the transmitting unit 22 may be implemented by a CPU, an MPU, a DSP, an FPGA, or the like located on the serving gateway.

For an understanding of the service gateway provided by the embodiment of the present invention, reference may be made to the description of the data transmission method in the first embodiment to the fourth embodiment, and details are not described herein again.

In the service gateway provided by the embodiment of the present invention, when the user enters the idle state, the SGW notifies the PGW, the PGW setting flag is set, and the subsequent PGW receives the downlink data to notify the SGW to trigger the paging process, and the PGW determines that the flag has been set, and the downlink data is buffered. The discarded downlink data is not used for charging, and the SGW is prevented from notifying the PGW of the discarded downlink data, so that the PGW charges more for the discarded downlink data.

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 can take the form of a hardware embodiment, a 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 and 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.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the present invention may be modified or equivalently substituted without departing from the spirit and scope of the invention.

Industrial applicability

The foregoing technical solution can prevent the PGW from charging more than the discarded downlink data in the downlink data triggering paging process on the network side.

Claims

A data transmission method includes:

Determining an internal user context according to downlink data sent by the network side, where the downlink data includes at least one packet;

Determining that the flag in the internal user context has been set, placing the downlink data into a cache unit, and the flag in the user context is set to indicate that the downlink data that exceeds the buffering capability is discarded when the cache unit is full;

Before initiating paging to the user, transmitting only the first message in the downlink data to the serving gateway SGW, the first message is used for paging to the user, and the first report is sent The text is not billed;

After the user is successfully paged, the downlink data of the buffer unit is sent to the SGW, and the downlink data sent to the SGW is charged.
The data transmission method according to claim 1, further comprising:

Receiving a release access bearer request message sent by the SGW when the user is idle, setting a flag in the internal user context;

Sending an release access bearer response message to the SGW.
The data transmission method according to claim 1 or 2, further comprising:

Receiving, by the network side, the downlink data sent by the network side;

When the downlink data exceeds the buffer unit capability, it is determined that the internal context flag is set, the downlink data exceeding the buffer unit capability is discarded, and the discarded downlink data is not charged.
The data transmission method according to claim 3, further comprising:

After the paging of the user is successful, receiving a modify bearer request message sent by the SGW, and clearing the flag in the internal user context;

Sending a modify bearer response message to the SGW.
A data transmission method includes:

Receiving the first packet in the downlink data sent by the packet data network gateway PGW to determine the service The gateway SGW does not perform data packet buffering, and discards the first packet in the downlink data.

Sending a downlink data notification message to the mobility management entity MME, where the downlink data notification message is used to indicate that paging is initiated to the user.
The data transmission method according to claim 5, further comprising:

Receiving a release access bearer request message sent by the MME when the user is idle;

And sending the release access bearer request message to the PGW, where the release access bearer request message is used by the PGW to determine that the user is in an idle state;

Receiving a release access bearer response message sent by the PGW.
The data transmission method according to claim 5 or 6, further comprising:

Receiving a modify bearer request message sent by the MME after the user successfully paging;

And sending the modify bearer request message to the PGW, where the modify bearer request message is used to indicate that the flag in the internal user context is cleared;

Receiving a modified bearer response message sent by the PGW;

Sending the modify bearer response message to the MME;

Receiving the downlink data sent by the PGW, and sending the downlink data to the user by using a base station.
A packet data network gateway PGW, the packet data network gateway includes:

a determining unit, configured to determine an internal user context according to downlink data sent by the network side, where the downlink data includes at least one packet; determining that a flag in the internal user context has been set, and placing the downlink data into a cache unit; The flag in the user context is set to indicate that downlink data that exceeds the buffering capability is discarded when the PGW buffer unit is full;

The sending unit is configured to send only the first one of the downlink data to the serving gateway SGW before initiating the paging to the user, where the first packet is used for paging the user, and The first packet is not charged; after the user is successfully paged, the downlink data of the buffer unit is sent to the SGW, and the downlink data sent to the SGW is charged;

a receiving unit, configured to receive the downlink data sent by the network side;

The cache unit is configured to store downlink data.
The packet data network gateway of claim 8

The receiving unit is further configured to receive a release access bearer request message sent by the SGW, and set a flag in the internal user context;

The sending unit is further configured to send a release access bearer response message to the SGW.
A packet data network gateway according to claim 8 or 9,

The determining unit is further configured to: when receiving the downlink data beyond the buffer unit capability in the paging process for the user, determining that the internal context flag is set, and the capability of the cache unit is exceeded The downlink data is discarded, and the discarded downlink data is not charged.
The packet data network gateway according to claim 10,

The receiving unit is further configured to: after the paging of the user is successful, receive a modify bearer request message sent by the SGW, and clear the flag in the internal user context;

The sending unit is further configured to send a modify bearer response message to the SGW.
A service gateway, the service gateway includes:

a receiving unit, configured to receive a first packet in the downlink data sent by the packet data network gateway PGW;

a determining unit, configured to determine that the serving gateway SGW does not perform data packet buffering, and discards the first packet in the downlink data;

The sending unit is configured to send a downlink data notification message to the mobility management entity MME, where the downlink data notification message is used to indicate that paging is initiated to the user.
The service gateway according to claim 12,

The receiving unit is further configured to receive a release access bearer request message sent by the MME, and receive a release access bearer response message sent by the PGW;

The sending unit is further configured to send the release access bearer request message to the PGW, where the release access bearer request message is used by the PGW to determine that the user is in an idle state.
A service gateway according to claim 12 or 13,

The receiving unit is further configured to: after the paging of the user is successful, receive a modify bearer request message sent by the MME; receive a modify bearer response message sent by the PGW; Describe the downlink data sent by the PGW;

The sending unit is further configured to send the modify bearer response message to the MME, and send the modify bearer request message to the PGW, where the modify bearer request message is used to indicate that the set internal user is to be set The flag in the context is cleared, and the flag in the user context is set to indicate that the downlink data is discarded for the buffering capability when the PGW buffer unit is full; the downlink data is sent to the user by the base station.