WO2016095219A1

WO2016095219A1 - Downlink data transmission apparatus and method

Info

Publication number: WO2016095219A1
Application number: PCT/CN2014/094411
Authority: WO
Inventors: 王硕; 马景旺
Original assignee: 华为技术有限公司
Priority date: 2014-12-19
Filing date: 2014-12-19
Publication date: 2016-06-23
Also published as: CN106233677B; CN106233677A

Abstract

Disclosed are a downlink data transmission apparatus and method, which relate to the technical field of networks. The apparatus comprises: an identifier acquisition module for acquiring identifier information about a user equipment according to downlink data sent by an application server; a state determination module for determining that the user equipment is in an energy-saving state according to the identifier information about the user equipment acquired by the identifier acquisition module; a message sending module for sending a notification message to the application server, the notification message being used for indicating for the application server to stop sending the downlink data to a classifier; and a cache indication module for sending the downlink data and a data sending indication to a cache device, the data sending instruction being used for indicating for the cache device to send the downlink data to the user equipment after the user equipment moves out of the energy-saving state. The present invention can solve the problem of occupying network resources due to the fact that downlink data is discarded when a user equipment is in an energy-saving state and is then sent by an application server, and can achieve the effect of saving network resources.

Description

Downlink data transmission device and method

Technical field

The present invention relates to the field of network technologies, and in particular, to a downlink data transmission apparatus and method.

Background technique

Certain application services customized by the user equipment need to be connected to multiple value-added service services in sequence. In this case, the network side needs to select an appropriate service chain according to the value-added service service, so that the downlink data can reach the user equipment through the serialized value-added service service. For example, for a video service, the service chain needs to serially connect the cache service and the firewall service; for the Internet service, the service chain needs to serially connect the content filtering service, the cache service, and the firewall service.

A downlink data transmission method provided by the related art includes: the flow classifier receives the downlink data sent by the application server, selects an appropriate service chain path according to the downlink data, and sends the downlink data to the packet data network gateway through the service chain path (English: Packet Data Network Gateway (referred to as: PGW), the PGW sends the downlink data to the serving gateway (English: Serving Gateway; SGW for short), and the SGW will send a message to the user equipment to send the downlink data to the mobility management network element (English: Mobility) Management Entity (abbreviation: MME), when the MME determines that the user equipment is in the energy-saving state, it responds to the SGW with a reply message that cannot be delivered, and the SGW discards the downlink data. The energy-saving state refers to a state in which the signaling and data sent by the network side cannot reach the user equipment.

When the user equipment is in the power-saving state, the SGW directly discards the downlink data. After determining that the user equipment does not receive the downlink data, the application server sends the downlink data to the SGW again through the service chain and the PGW until the user equipment receives the downlink data. After the transmission is stopped, the downlink data needs to be transmitted multiple times in the network, which occupies a large amount of network resources, resulting in waste of network resources.

Summary of the invention

In order to solve the problem that the downlink data is discarded due to the inability to reach the user equipment, and the downlink data needs to be transmitted multiple times, the embodiment of the present invention provides a downlink data transmission apparatus and method. The technical solution is as follows:

In a first aspect, a downlink data transmission apparatus is provided, the apparatus comprising:

An identifier obtaining module, configured to acquire identifier information of the user equipment according to the downlink data sent by the application server;

a state determining module, configured to determine, according to the identifier information of the user equipment acquired by the identifier obtaining module, that the user equipment is in a power saving state;

a message sending module, configured to send a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the classifier;

a cache indication module, configured to send the downlink data and a data sending indication to the cache device, where the data sending indication is used to instruct the cache device to send the downlink data to the user after the user equipment moves out of a power saving state device.

In a first possible implementation manner of the first aspect, the response message further includes a remaining duration of the power saving state of the user equipment, and the buffer indication module is configured to use the downlink data and the remaining time of the energy saving state. Transmitting, by the data sending indication, to the cache device, where the data sending indication is used to indicate that the cache device waits for a duration corresponding to a remaining time of the energy-saving state of the user equipment, and sends the downlink data to the User equipment.

According to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the cache device is a service chain in a service chain corresponding to the gateway or the downlink data Enable unit.

In a second aspect, a downlink data transmission apparatus is provided, the apparatus comprising:

The receiving module is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state;

The data sending module is configured to send the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication received by the receiving module.

In a first possible implementation manner of the second aspect, the indication receiving module is configured to receive downlink data, a power saving state remaining duration, and a data sending indication sent by the traffic classifier, where the data sending indication is used And instructing the cache device to send the downlink data to the user equipment after waiting for a duration corresponding to a remaining duration of the power saving state of the user equipment.

According to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the cache device is a service chain in a service chain corresponding to the gateway or the downlink data Enable unit.

In a third aspect, a downlink data transmission apparatus is provided, the apparatus comprising:

a request receiving module, configured to receive a status query request that is sent by the flow classifier and includes identifier information of the user equipment, where the status query request is used to request to acquire a state in which the user equipment is located;

a status determining module, configured to determine, according to the status query request received by the request receiving module, that the user equipment is in a power saving state;

The message sending module is configured to send a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state.

In a first possible implementation manner of the third aspect, the response message further includes a remaining duration of the power saving state of the user equipment.

According to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the state determining module is configured to obtain the a reporting message associated with the user equipment, where the reporting message is sent by the mobility management network element MME to the querying device when determining that the user equipment is in a power saving state; and determining, according to the reporting message, that the user equipment is in a power saving state .

According to a second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the device further includes:

a request sending module, configured to send, by the status determining module, a subscription request to the MME, where the user equipment is in a power saving state, the subscription request includes identifier information of the user equipment, according to the status query request The subscription request is used to request the MME to send the report message to the querying device when determining that the user equipment is in a power saving state.

In a fourth aspect, a downlink data transmission method is provided, where the method includes:

The traffic classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server.

Determining, by the flow classifier, that the user equipment is in a power saving state according to the identifier information of the user equipment;

The flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the classifier;

The flow classifier sends the downlink data and the data transmission indication to the cache device, where the data transmission indication is used to instruct the cache device to send the downlink data to the user equipment after the user equipment moves out of the power saving state. .

In a first possible implementation manner of the fourth aspect, the response message further includes a remaining duration of the energy saving state of the user equipment, and the flow classifier sends the downlink data and the data sending indication to the cache device, where The data sending indication is used to indicate that the cache device moves out of the user equipment to save energy Sending the downlink data to the user equipment after the status includes:

The flow classifier sends the downlink data, the remaining time duration of the power saving state, and the data sending indication to the cache device, where the data sending indication is used to indicate that the cache device is waiting for energy saving of the user equipment. After the duration of the remaining time of the state, the downlink data is sent to the user equipment.

According to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the cache device is a service chain in a service chain corresponding to the gateway or the downlink data Enable unit.

A fifth aspect provides a downlink data transmission method, where the method includes:

The buffering device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to instruct the cache device to send the downlink data to the user equipment after the user equipment moves out of the power saving state;

And the buffering device sends the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication.

In a first possible implementation manner of the fifth aspect, the cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device is after the user equipment moves out of the power saving state. Sending the downlink data to the user equipment includes:

The buffering device receives the downlink data, the power saving state remaining duration, and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device waits for the remaining time of the energy saving state of the user equipment. After the duration, the downlink data is sent to the user equipment.

According to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the cache device is a service chain in a service chain corresponding to the gateway or the downlink data Enable unit.

In a sixth aspect, a downlink data transmission method is provided, where the method includes:

The querying device receives a status query request that is sent by the flow classifier and includes the identifier information of the user equipment, where the status query request is used to request to acquire a state in which the user equipment is located;

Determining, by the querying device, that the user equipment is in a power saving state according to the status query request;

The querying device sends a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state.

In a first possible implementation manner of the sixth aspect, the response message further includes a remaining duration of the power saving state of the user equipment.

According to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the querying device determines that the user equipment is in a power saving state according to the status query request include:

The querying device obtains the report message associated with the user equipment according to the status query request, and the report message is sent by the mobility management network element MME to the query device when determining that the user equipment is in a power-saving state;

The querying device determines that the user equipment is in a power saving state according to the reported message.

According to a second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the querying device, before determining that the user equipment is in a power saving state, according to the status query request, The method also includes:

The querying device sends a subscription request to the MME, where the subscription request includes the identifier information of the user equipment, and the subscription request is used to request the MME to notify the querying device when determining that the user equipment is in a power saving state. Sending the reported message.

In a seventh aspect, a downlink data transmission apparatus is provided for use in a stream classifier, the apparatus comprising: a bus, and a processor, a memory, a transmitter, and a receiver coupled to the bus. The memory is configured to store a plurality of instructions for performing the downlink data transmission method of any of the fourth aspects, the instructions being configured to be executed by the processor.

In an eighth aspect, a downstream data transmission apparatus is provided for use in a cache device, the apparatus comprising: a bus, and a processor, a memory, a transmitter, and a receiver coupled to the bus. The memory is configured to store a plurality of instructions for performing the downlink data transmission method of any of the fifth aspects, the instructions being configured to be executed by the processor.

In a ninth aspect, a downlink data transmission apparatus is provided for interrogating a device, the apparatus comprising: a bus, and a processor, a memory, a transmitter, and a receiver connected to the bus. The memory is configured to store a plurality of instructions for performing the downlink data transmission method of any of the sixth aspects, the instructions being configured to be executed by the processor.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

Determining that the user equipment is in a power-saving state; sending a notification message to the application server, the notification message is used to instruct the application server to stop sending downlink data to the classifier; and sending downlink data and a data transmission indication to the cache device, the data sending indication is used to indicate the cache After the user equipment moves out of the energy-saving state, the device sends the downlink data to the user equipment, so that the application server does not send the downlink data again, and the cache device sends the downlink data to the user equipment after the user equipment moves out of the energy-saving state. The problem of saving network resources is achieved by discarding the problem that the downlink data is discarded when the user equipment is in the energy-saving state, and the application server uses the downlink data to transmit a large amount of network resources.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a system architecture diagram of a system architecture evolution SAE according to various embodiments of the present invention;

2 is a system architecture diagram of a resource management system according to various embodiments of the present invention;

3 is a schematic structural diagram of a downlink data transmission apparatus according to an embodiment of the present invention;

4 is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present disclosure;

FIG. 9 is a flowchart of a method for transmitting a downlink data according to an embodiment of the present invention;

FIG. 10 is a flowchart of still another method for downlink data transmission according to an embodiment of the present invention;

11 is a flowchart of still another method for downlink data transmission according to an embodiment of the present invention;

FIG. 12 is a flowchart of still another method for downlink data transmission according to an embodiment of the present invention;

13 is a flowchart of still another method for downlink data transmission according to an embodiment of the present invention;

FIG. 14 is a flowchart of still another method for downlink data transmission according to an embodiment of the present invention;

15 is a flowchart of still another method for downlink data transmission according to an embodiment of the present invention;

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

FIG. 17 is a schematic flowchart diagram of a second downlink data transmission method according to an embodiment of the present disclosure;

FIG. 18 is a schematic flowchart diagram of a third downlink data transmission method according to an embodiment of the present invention;

FIG. 19 is a schematic flowchart diagram of a fourth downlink data transmission method according to an embodiment of the present disclosure;

FIG. 20 is a schematic structural diagram of a downlink data transmission apparatus according to an embodiment of the present invention.

detailed description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be described below with reference to the accompanying drawings. The embodiments are described in further detail.

Please refer to the system architecture diagram of System Architecture Evolution (SAE) shown in Figure 1. The SAE includes: Evolved UMTS Terrestrial Radio Access Network (English: Evolved UMTS Terrestrial Radio Access Network; E-UTRAN), mobility management network element (English: Mobility Management Entity; MME), service gateway (English: Serving Gateway; S-GW for short), packet data network gateway entity (English: Packet Data Network Gateway; Abbreviation: P-GW), Policy and Charging Rule Function (English: Policy and Charging Rule Function; PCRF), Home Network Server (English: Home Subscriber Server; HSS), User Equipment (English: User Equipment) Abbreviation: UE), UMTS Terrestrial Radio Access Network (English: UMTS Terrestrial Radio Access Network; UTRAN for short), GSM/EDGE Radio Access Network (English: GSM/EDGE Radio Access Network; GERAN) and service universal Packet radio service support node (English: Serving GPRS Supporting Node; referred to as: SGSN).

The E-UTRAN is used to implement functions related to the wireless evolved network; the MME is responsible for mobility management of the control plane, such as user context and mobility state management, and assigning user temporary identity identifiers; S-GW is the third generation partner program (English: 3rd Generation Partner Project; abbreviation: 3GPP) access to the user plane anchor between networks; P-GW is the user plane anchor between the 3GPP access network and the non-3GPP access network, and the external packet data network ( English: Packet Data Network; referred to as: PDN) interface; PCRF is used for policy control rule formulation and flow-based charging; HSS is used to store user subscription information; UE uses E-UTRAN and SAE to control plane and user plane interaction User terminal equipment. UTRAN, GERAN are used to implement all wireless related functions in existing GPRS/UMTS networks. The SGSN is used to implement functions such as routing and forwarding, mobility management, session management, and user information storage in the GPRS/UMTS network.

Please refer to the system architecture diagram of the resource management system shown in FIG. 2. The resource management system includes a radio access network (English: Radio access network; RAN for short), a gateway, a flow classifier, a service conversion unit, and a service chain enablement. Unit and controller. The traffic classifier is configured to identify the characteristics of the downlink data, and is connected to the PCRF; the controller is configured to select a service conversion unit, the service conversion unit is configured to select a service chain enabling unit suitable for downlink data; and the service chain enabling unit is used to enable the service. Some kind of service in the chain. For example, when the downlink data is video service data, since the service chain corresponding to the video service data needs to be serially connected to the cache service and the firewall service, the service chain enabling unit that enables the cache service is slow. The service enablement unit and the service chain enable unit that enables the firewall service are firewall service enable units.

The energy saving states involved in the embodiments of the present invention are explained below, as follows:

The power saving mode (English: power saving mode; PSM) refers to the state in which the signaling and data sent by the network cannot reach the user equipment.

Depending on the scenario in which the user equipment is located, the interaction between the user equipment and the network side may be once every few hours, once in a few days, or even longer. If the existing mobility management scheme is adopted for the user equipment, the user equipment is maintained. When the network is synchronized, a large amount of unnecessary signaling overhead is generated, the network load is increased, and the power consumption of the user equipment is also increased. Therefore, 3GPP defines a power saving state for the user equipment. That is, after the user equipment enters the power-saving state from the idle state, the signaling and data sent by the network side cannot reach the user equipment.

Please refer to FIG. 3, which is a schematic structural diagram of a downlink data transmission apparatus according to an embodiment of the present invention. The downlink data transmission device can be applied to a flow classifier, and the downlink data transmission device can include:

The identifier obtaining module 301 is configured to obtain the identifier information of the user equipment according to the downlink data sent by the application server.

The state determining module 302 is configured to determine, according to the identifier information of the user equipment acquired by the identifier obtaining module 301, that the user equipment is in a power saving state.

The message sending module 303 is configured to send a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier.

The buffer indication module 304 is configured to send a downlink data and a data transmission indication to the cache device, where the data transmission indication is used to instruct the cache device to send the downlink data to the user equipment after the user equipment moves out of the power saving state.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention determines that the user equipment is in a power-saving state, and sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier; Sending a downlink data and a data sending indication, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, so that the application server does not send the downlink data again, and the cache device is removed from the user equipment. After the energy saving state is sent to the user equipment, the downlink data is discarded, and the downlink data is discarded when the user equipment is in the power saving state, and the application server sends the downlink data again next time. The problem of network resources can achieve the effect of saving network resources.

Please refer to FIG. 4, which is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present invention. The downlink data transmission device can be applied to a flow classifier, and the downlink data transmission device can include:

The identifier obtaining module 401 is configured to obtain identifier information of the user equipment according to the downlink data sent by the application server.

The downlink data refers to a data packet sent by the server to the user equipment through the network side, or a data stream composed of a series of data packets. In this embodiment, the downlink data is sent by the application server to the traffic classifier, and the traffic classifier is further forwarded to the user equipment.

The application server can exchange information with the user equipment, and can also manage a type of user equipment having the same characteristics. For example, when the application server is a machine to machine (English: machine to machine; M2M) server, the M2M server is used to manage the M2M type user equipment and exchange information with the M2M type user equipment.

The stream classifier is used to identify the characteristics of the downlink data, and determines further processing or optimization of the downlink data on the network side according to the characteristics of the downlink data. The downlink data may be the home information of the user equipment to which the downlink data belongs, for example, the group or type to which the user equipment belongs, or may be the media type of the downlink data, such as an image, an audio, a video, or the like; or may be a downlink data. The quintuple information includes the source Internet Protocol (English: Internet Protocol; IP address), the destination IP address, the source port number, the destination port number, and the protocol type; and may also indicate other downlink data or The characteristics of the user equipment information of the downlink data. Further processing or optimization refers to operations performed by the network side and/or the service chain according to the characteristics of the identified downlink data, which may be operations such as compression, acceleration, and buffering of the media stream.

Generally, the downlink data needs to include the identifier information, where the identifier information is used to indicate the user equipment that receives the downlink data.

The state determining module 402 is configured to determine, according to the identifier information of the user equipment acquired by the identifier obtaining module 401, that the user equipment is in a power saving state.

When the user equipment is in the power-saving state, the signaling and data sent by the network to the user equipment cannot reach the user equipment. Therefore, in order to avoid sending downlink data to the user equipment that is in the energy-saving state, the downlink data is passed through the service chain. After the core network is lost, the application server needs to send the downlink data again to cause a large network load problem, and the traffic classifier sends downlink data to the user equipment. Before, you need to determine whether the user equipment is in a power-saving state.

If the traffic classifier determines that the user equipment is in the power-saving state according to the identifier information of the user equipment, the following operations are continued; if the traffic classifier determines that the user equipment is not in the power-saving state according to the identifier information of the user equipment, The downlink data transmission process transmits the downlink data, which is not described in this embodiment.

The message sending module 403 is configured to send a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier.

After determining that the user equipment is in the power-saving state, the traffic classifier may not discard the downlink data, but send the downlink data to the user equipment after the user equipment moves out of the energy-saving state.

Generally, the application server has a retransmission duration. When the application server does not receive the acknowledgment message sent by the user equipment after waiting for the retransmission, the application server fails to send the downlink data by default. data. Therefore, in order to prevent the problem that the network load caused by the downlink data is large when the application server moves out of the power saving state, the traffic classifier may determine that the user equipment is in the power saving state and the application server sends the network again. Before the downlink data, the notification message is sent to the application server, so that the application server stops sending the downlink data to the traffic classifier after receiving the notification message. The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier.

The buffer indication module 404 is configured to send the downlink data and the data sending indication to the cache device, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

After determining that the user equipment is in the power-saving state, the flow classifier may determine the cache device, and send the downlink data and the data sending indication to the cache device, where the cache device caches the downlink data, and after the user equipment moves out of the energy-saving state, the downlink data is used. Sent to the user device.

In this embodiment, the flow classifier may first send a notification message to the application server, and then send the downlink data and the data transmission indication to the cache device. The downlink data and the data transmission indication may be sent to the cache device, and then the notification message is sent to the application server. The downlink data and the data transmission indication may be sent to the cache device at the same time as the notification message is sent to the application server. This embodiment does not limit the sequence. The traffic classifier sends a notification message to the application server before the timer of the application server times out. After the timer expires, the application server continues to send the downlink data to the traffic classifier.

When the status of the user equipment is queried, the status determining module 401 is specifically configured to send a status query request including the identification information of the user equipment to the querying device, where the status query request is used to request acquisition. a status of the user equipment; receiving a response message returned by the query device according to the status query request, the response message includes indication information indicating that the user equipment is in a power saving state;

The query device is an MME or a Policy and Charging Rule Function (English: Policy and Charging Rule Function; PCRF).

The status query request includes the identifier information of the user equipment, and is used to instruct the querying device to return the status of the user equipment identified by the identifier information to the classifier. The reply message is used to notify the stream classifier of the state of the user equipment. The response message includes indication information, which is used to indicate that the cache device sends the downlink data to the user equipment after waiting for the remaining time of the power saving state.

In the implementation, the first query interface may be added to the protocol of the flow classifier, so that the flow classifier receives the response message returned by the query device through the first query interface after sending the status query request to the query device through the first query interface. .

In this embodiment, the flow classifier may query the MME for the status of the user equipment, and may also query the PCRF for the status of the user equipment. The following two methods are specifically described below, as follows:

First, the flow classifier queries the MME for the status of the user equipment.

The user equipment enters the power-saving state after the predetermined time elapses from the idle state. Since the predetermined time is defined by the active timer, the MME can use the active timer to sense when the user equipment is in the power-saving state. When the user equipment is in the power-saving state, if the user equipment does not actively send uplink data, until the user equipment performs the next periodic tracking area update (English: Tracking Area Update; referred to as TAU), the user equipment moves out of the energy-saving state, and the period The QoS timer is determined by the MME, so the MME can determine the removal time of the next time the user equipment moves out of the power saving state.

After receiving the identifier information of the user equipment, the MME determines which user equipment is the device according to the identifier information, and then queries whether the user equipment is in a power-saving state. If the user equipment is in a power-saving state, the MME generates indication information for indicating that the user equipment is in a power-saving state, and adds the indication information and the identification information to the response message and sends the indication information to the traffic classifier. If the user equipment is not in the power-saving state, the MME may not send a response message to the flow classifier, or generate other information different from the indication information, and add the other information and the identification information to the response message and send it to the flow classifier.

Second, the flow classifier queries the PCRF for the status of the user equipment.

The MME can detect when the user equipment is in the power-saving state and the next time the user equipment moves out of the power-saving state. Therefore, the PCRF can obtain the state of the user equipment from the MME in advance, and then notify the state where the user equipment is located. Stream classifier.

Each time the PCRF requests the MME to be in a state in which the user equipment is located, both the signaling and the time are consumed. Therefore, the PCRF may subscribe to the MME in advance to report the report message associated with the user equipment, where the report message is when the user equipment is in the power saving state. The message sent by the MME to the PCRF, where the report message includes indication information and identification information. After receiving the report message, the PCRF stores the indication information and the identifier information correspondingly. After the identifier information is received by the PCRF, the stored report message is queried for the presence of the report message containing the identifier information. If the report message exists, the indication information and the identifier information are added to the response message and sent to the flow classifier; If there is no report message, other information different from the indication information is generated, and other information and identification information are added to the response message and sent to the stream classifier.

Optionally, the downlink data transmission apparatus provided in this embodiment further includes:

The function determining module 405 is configured to determine, according to the downlink data, that the user equipment supports the energy-saving state according to the downlink data, according to the identifier information of the user equipment.

In this embodiment, before querying the state of the user equipment, the flow classifier also needs to determine whether the user equipment supports the energy-saving state. If the traffic classifier determines that the user equipment supports the energy-saving state, it needs to query the state of the user equipment before sending the downlink data; if the traffic classifier determines that the user equipment does not support the energy-saving state, it indicates that the user equipment can directly send the downlink data. The next network element is given to save the signaling consumed by the state in which the user equipment is queried.

The flow classifier can determine whether the user equipment supports the energy saving state according to the characteristics of the downlink data. For example, when the feature of the downlink data indicates the M2M type user equipment of the user equipment, the flow classifier determines that the state of the user equipment needs to be queried.

Preferably, the response message further includes a remaining time duration of the energy saving state of the user equipment, and the buffer indication module 404 is configured to send the downlink data, the remaining state of the power saving state, and the data sending indication to the cache device, where the data sending indication is used to indicate the cache device. After waiting for the duration corresponding to the remaining duration of the energy-saving state of the user equipment, the downlink data is sent to the user equipment.

Since the cache device needs to send the downlink data to the user equipment after the user equipment moves out of the power saving state, the cache device also needs to determine when the user equipment moves out of the power saving state. The time when the user equipment moves out of the energy-saving state may be represented by the remaining duration of the user energy-saving state, where the remaining duration of the energy-saving state refers to the remaining duration from the current time to the user equipment moving out of the energy-saving state. For example, when the user equipment has left the power saving state for 30 minutes from the current time, the remaining time of the energy saving state is determined to be 30 minutes.

This embodiment provides two methods for calculating the remaining duration of the energy saving state. In the first method, The MME obtains the current time and the removal time of the next time the user equipment removes the energy-saving state, subtracts the current time from the removal time, and obtains the remaining time of the energy-saving state, adds the remaining time of the energy-saving state to the response message, and sends the time to the flow classifier. The remaining time length of the energy-saving state in the response message can be directly read; in the second method, the MME determines the entry time of the user equipment to enter the energy-saving state and the total energy-saving time of the user equipment, and adds the entry time and the total energy-saving duration to the response message. The traffic classifier sends the current class time to the entry time, obtains the energy-saving state duration, and subtracts the total energy-saving duration from the energy-saving state duration to obtain the remaining time of the energy-saving state.

For the sake of understanding, the second embodiment is used to calculate the remaining duration of the energy-saving state. The time when the user equipment enters the energy-saving state is 12:00, and the total energy-saving duration is 30 minutes. If the current time is 12:10, Then, the calculated duration of the energy-saving state is 10 minutes, and the remaining time for the energy-saving state is further calculated to be 20 minutes.

In this embodiment, the traffic classifier needs to cache the downlink data by using the cache device. In the implementation, the first cache interface may be added to the protocol of the traffic classifier, so that the traffic classifier sends the buffer to the cache device through the first cache interface. After the downlink data, the remaining time of the energy-saving state, and the data transmission indication, the cache device sends the downlink data to the user equipment after waiting for the remaining time of the energy-saving state.

The cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data. That is, when the downlink data is buffered, the flow classifier may send the downlink data to the gateway, and the gateway buffers the downlink data. The downlink data may also be sent to the service chain enabling unit, and the service chain enabling unit buffers the downlink data.

Specifically, the traffic classifier may determine whether the service chain is required to be involved or whether the service chain is deployed on the network side according to the characteristics of the downlink data. If it is determined that there is no service chain corresponding to the downlink data, the traffic classifier determines that the service chain does not exist. The enabling unit, at this time, the flow classifier sends the downlink data, the remaining time of the energy saving state, and the data sending indication to the gateway, and the gateway buffers the downlink data and starts timing. When the time duration reaches the remaining time of the energy saving state, the gateway determines the user equipment. After the energy-saving state is removed, the downlink data is sent to the user equipment. If it is determined that the service chain corresponding to the downlink data exists, the traffic classifier determines that the service chain enabling unit exists. At this time, the traffic classifier will downlink data and the remaining time of the energy-saving state. And the data sending indication is sent to the service switching unit, and the service switching unit selects a service chain enabling unit from the service chain suitable for the downlink data, and sends the downlink data, the energy saving state remaining duration, and the data sending indication to the service chain enabling unit, The service chain enabling unit stores the downlink data and starts counting When the timing reaches a long-saving state, enabling business chain unit determines that the user equipment out of the energy saving state, sends the downlink data to the user equipment remaining.

When the identification information of the user equipment is obtained, the identifier information of the user equipment is the identity ID of the user equipment; the identifier obtaining module 401 is specifically configured to obtain the ID of the user equipment from the downlink data, where the downlink data includes the ID of the user equipment; Or obtaining quintuple information of the downlink data from the downlink data, and determining an ID of the user equipment according to the quintuple information, where the downlink data includes quintuple information;

or,

The identification information of the user equipment is the destination Internet Protocol (English: Internet Protocol; IP address) of the downlink data, and the identifier obtaining module 401 is specifically configured to obtain the quintuple information of the downlink data from the downlink data, according to the quintuple. The information determines a destination IP address, and the downlink data includes quintuple information;

or,

The identification information of the user equipment is the quintuple information of the downlink data, and the identifier obtaining module 401 is specifically configured to obtain the quintuple information from the downlink data, where the downlink data includes the quintuple information.

According to the content included in the downlink data, different identification information can be determined, and then the user equipment is determined according to the identification information. The following three methods for determining the user equipment are respectively described in detail, as follows:

First, the identification information is the ID of the user equipment.

When the downlink data includes the ID of the user equipment, the traffic classifier can directly read the ID of the user equipment from the downlink data, add the ID of the user equipment to the status query request, and send the ID to the MME. The MME determines the user according to the ID of the user equipment. device.

When the downlink data includes the quintuple information of the downlink data, the traffic classifier can directly read the quintuple information from the downlink data, and send the quintuple information to the gateway. In the first implementation manner, the gateway directly maps the quintuple information to the ID of the user equipment, and sends the ID of the user equipment to the traffic classifier. In the second implementation manner, the gateway sends the quintuple information to the The MME, the MME maps the quintuple information to the ID of the user equipment, and sends the ID of the user equipment to the stream classifier. The traffic classifier adds the ID of the user equipment to the status query request and sends it to the MME. The MME determines the user equipment according to the ID of the user equipment.

Second, the identification information is the destination IP address.

When the downlink data includes the quintuple information, the flow classifier may obtain the destination IP address from the quintuple information, and add the destination IP address as the identification information to the status query request. The status query request needs to be forwarded to the MME through the gateway. Therefore, in the first implementation manner, the gateway maps the destination IP address to the ID of the user equipment, and adds the ID of the user equipment to the status query request. The MME determines the user equipment according to the ID of the user equipment. In the second implementation manner, the gateway sends the status query request including the destination IP address to the MME, and the MME maps the destination IP address to the ID of the user equipment. The user equipment is determined according to the ID of the user equipment.

Third, the identification information is quintuple information.

When the downlink data includes the quintuple information, the traffic classifier may add the quintuple information as the identification information to the status query request, and the status query request needs to be forwarded to the MME through the gateway. Therefore, in the first implementation manner, The gateway obtains the destination IP address from the quintuple information, and maps the destination IP address to the ID of the user equipment. The ID of the user equipment is added to the status query request and sent to the MME. The MME determines the user equipment according to the ID of the user equipment. In the second implementation manner, the gateway obtains the destination IP address from the quintuple information, adds the destination IP address to the status query request, and sends the destination IP address to the MME, and the MME maps the destination IP address to the ID of the user equipment, and then according to the The ID of the user equipment determines the user equipment.

The gateway may be a combination of a P-GW and an S-GW, or may be an independent network element.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention determines that the user equipment is in a power-saving state, and sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier; Sending a downlink data and a data sending indication, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, so that the application server does not send the downlink data again, and the cache device is removed from the user equipment. After the energy saving state is sent to the user equipment, the downlink data is discarded, and the downlink data is discarded when the user equipment is in the power saving state, and the application server uses the downlink data to use a large amount of network resources, which can save network resources. Effect.

In addition, before determining that the user equipment is in a power-saving state according to the downlink data, the user equipment supports the energy-saving state according to the downlink data, and may not query the state of the user equipment when determining that the user equipment does not support the energy-saving state. To save the signaling consumed by the state in which the user equipment is queried.

Please refer to FIG. 5, which is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present invention. The downlink data transmission device can be applied to a cache device, and the downlink data transmission device can include:

The indication receiving module 501 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data after the user equipment moves out of the power saving state. Sent to the user device.

Optionally, the receiving module 501 is configured to receive downlink data and a data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent after the traffic classifier determines that the user equipment is in a power saving state, where the user The device is in a power-saving state and further indicates that the traffic classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier.

Optionally, the receiving module 501 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent after the traffic classifier sends the notification message to the application server, where The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiving module 501 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent before the traffic classifier sends the notification message to the application server, where The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiving module 501 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent, when the traffic classifier sends the notification message to the application server, where The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

The data sending module 502 is configured to send downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication received by the receiving module 501.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention receives the downlink data and the data transmission indication sent by the flow classifier, and sends the downlink data to the user equipment after the user equipment moves out of the energy-saving state according to the data transmission indication. After the user equipment moves out of the energy-saving state, the downlink data is sent to the user equipment instead of discarding the downlink data, and the flow classifier sends a notification message to the application server to instruct the application server to stop sending the downlink data, which can be solved in the user equipment. When the energy is saved, the downstream data is discarded, and the application server sends the downlink data again to occupy a large amount of network resources, which can save network resources.

Please refer to FIG. 6, which is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present invention. The downlink data transmission device can be applied to a cache device, and the downlink data transmission device can include:

The indication receiving module 601 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiving module 601 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent after the traffic classifier determines that the user equipment is in a power saving state, where the user The device is in a power-saving state and further indicates that the traffic classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier.

Optionally, the receiving module 601 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent after the traffic classifier sends the notification message to the application server, where The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiving module 601 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent before the traffic classifier sends the notification message to the application server, where The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiving module 601 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent, when the traffic classifier sends the notification message to the application server, where The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

The process of the flow classifier determining that the user equipment is in the energy-saving state is described in detail in the embodiment shown in FIG. 4, and details are not described herein.

The data sending module 602 is configured to send the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication received by the receiving module 601.

After receiving the data sending indication, the cache device buffers the downlink data according to the data sending indication, and After determining that the user equipment moves out of the energy-saving state, the downlink data is sent to the user equipment.

The indication receiving module 601 is specifically configured to receive the downlink data, the power saving state remaining duration, and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate the length of time that the cache device waits for the remaining time of the energy saving state of the user equipment. After that, the downlink data is sent to the user equipment.

In this embodiment, the method for obtaining the remaining duration of the energy-saving state is provided. In the first method, the flow classifier sends the remaining time of the energy-saving state to the cache device, and the cache device directly receives the remaining time of the energy-saving state; in the second method, The flow classifier sends the entry time of the user equipment into the energy-saving state and the total energy-saving time of the user equipment to the cache device, and the cache device subtracts the entry time from the current time, obtains the duration of the energy-saving state, and subtracts the total energy-saving duration from the energy-saving state duration. Get the remaining time of the energy saving state.

After the remaining time period of the energy-saving state is obtained, the cache device starts counting. When the timer duration reaches the remaining time of the power-saving state, the cache device sends the downlink data to the user equipment. In the implementation, the second cache interface may be added to the protocol of the cache device, so that the cache device waits for energy saving after receiving the downlink data sent by the flow classifier, the remaining time of the energy saving state, and the data sending indication through the second cache interface. After the remaining time of the state, the downlink data is sent to the user equipment.

In this embodiment, the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data. Specifically, when there is a service chain corresponding to the downlink data, the cache device is a service chain enabling unit in the service chain corresponding to the downlink data; when there is no service chain corresponding to the downlink data, the cache device is a gateway.

In addition, the downlink data, the power saving state remaining duration, and the data sending indication sent by the traffic classifier are used, and the data sending indication is used to indicate that the cache device waits for the duration corresponding to the remaining time of the energy saving state of the user equipment, and sends the downlink data to the downlink data. The user equipment can accurately determine the time when the user equipment moves out of the energy-saving state according to the remaining time of the energy-saving state, and can solve the problem that the determined downlink data transmission failure occurs due to the time when the user equipment moves out of the energy-saving state, and the downlink data transmission success can be improved. The effect of the rate.

Please refer to FIG. 7, which is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present invention. The downlink data transmission device can be applied to the query device, and the downlink data transmission device can include:

The request receiving module 701 is configured to receive a status query request that is sent by the flow classifier and includes identifier information of the user equipment, where the status query request is used to request to acquire a state in which the user equipment is located.

The status determining module 702 is configured to determine, according to the status query request received by the request receiving module 701, that the user equipment is in a power saving state.

The message sending module 703 is configured to send a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state.

Optionally, the message sending module 703 is configured to send a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state, where the indication information is further used to indicate that the traffic classifier sends the information to the application server. a notification message, the notification message is used to indicate that the application server stops sending the downlink data, and the indication information is further used to indicate that the traffic classifier sends the downlink data and the data transmission indication to the cache device, where the data transmission indication is used to indicate that the cache device is at the user equipment. After the power saving state is removed, the downlink data is sent to the user equipment.

The traffic classifier may first send a notification message to the application server, and then send the downlink data and the data sending indication to the cache device. The downlink data and the data sending indication may be sent to the cache device, and then the notification message is sent to the application server; The downlink data and the data transmission indication are sent to the cache device at the same time as the notification message is sent to the application server. This embodiment does not limit the sequence.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention receives a status query request that includes the identifier information of the user equipment, and the status query request is used to request to acquire the state of the user equipment; The status query request determines that the user equipment is in a power-saving state, and sends a response message to the flow classifier, where the response message includes indication information indicating that the user equipment is in a power-saving state, and may send, to the flow classifier, indication information that the user equipment is in a power-saving state, Pass the letter The traffic indicator classifier sends a notification message to the application server, and sends the downlink data and the data transmission indication to the cache device, so that the downlink data is sent to the user equipment when the user equipment is in the power saving state, and the downlink data is discarded, and the application server is The problem of consuming a large amount of network resources caused by resending the downlink data can achieve the effect of saving network resources.

Please refer to FIG. 8 , which is a schematic structural diagram of still another downlink data transmission apparatus according to an embodiment of the present invention. The downlink data transmission device can be applied to the query device, and the downlink data transmission device can include:

The request receiving module 801 is configured to receive a status query request that is sent by the flow classifier and includes identifier information of the user equipment, where the status query request is used to request to acquire a state in which the user equipment is located.

The status query request is generated by the flow classifier after receiving the downlink data sent by the application server, and obtaining the identification information of the user equipment from the downlink data, according to the identifier information.

The status determining module 802 is configured to determine, according to the status query request received by the request receiving module 801, that the user equipment is in a power saving state.

The querying device can determine which user device is based on the identifier information, and then query whether the user device is in a power saving state. When the identifier information is the ID of the user equipment, the querying device directly determines the user equipment according to the ID of the user equipment; when the identifier information is the destination IP address of the downlink data, the querying device maps the destination IP address to the ID of the user equipment, and then The user equipment is determined according to the ID of the user equipment.

In this embodiment, the querying device may be an MME or a PCRF. The following describes the methods for querying the status of the user equipment by the two devices, as follows:

First, the query device is the MME.

The user equipment enters the power-saving state after the predetermined time elapses from the idle state. Since the predetermined time is defined by the active timer, the MME can use the active timer to sense when the user equipment is in the power-saving state. When the user equipment is in the power-saving state, if the user equipment does not actively send uplink data, until the user equipment performs the next periodic TAU, the user equipment moves out of the energy-saving state, and the periodic TAU timer is determined by the MME, so the MME may Determine the removal time of the next time the user equipment moves out of the power saving state. After receiving the identifier information of the user equipment, the MME determines which user equipment is the device according to the identifier information, and then queries whether the user equipment is in a power-saving state.

Second, the query device is a PCRF.

The MME can detect when the user equipment is in the power-saving state and the next time the user equipment moves out of the power-saving state. Therefore, the PCRF can obtain the user equipment in advance from the MME. The status of the user device is notified to the stream classifier.

The requesting module 802 is configured to obtain the reporting message associated with the user equipment according to the status query request, and the reporting message is obtained by the PCRF. When the MME determines that the user equipment is in a power-saving state, the MME sends the information to the querying device. According to the reported message, the user equipment is determined to be in a power-saving state.

The PCRF may subscribe to the MME in advance to report the report message associated with the user equipment, and the report message is sent by the MME to the PCRF when the user equipment is in a power-saving state, and the report message includes indication information and identification information. After receiving the report message, the PCRF stores the indication information and the identifier information correspondingly. After the PCRF receives the identifier information, the stored report message is queried for the presence of the report message containing the identifier information. If the report message is present, the user equipment is determined to be in a power-saving state; if the report message does not exist, the user equipment is determined. Not in a state of energy saving.

The downlink data transmission device provided by this embodiment further includes:

The request sending module 804 is configured to: after the state determining module 802 determines that the user equipment is in the power saving state, send a subscription request to the MME, where the subscription request includes the identifier information of the user equipment, where the subscription request is used to request the MME to determine the user. The device sends a report message to the query device when the device is in the power-saving state.

Specifically, the user equipment sends a power saving status report request to the PCRF when the Internet Protocol-Connectivity Access Network (IP-CAN) session is established, and the energy-saving status report request includes the user equipment. The identifier information is used to indicate that the PCRF subscribes to the MME for reporting the message. The PCRF generates a subscription request according to the identifier information, and forwards the subscription request to the MME through the PGW or other device. After receiving the subscription request, the MME sends a report message to the PCRF after the user equipment identified by the identifier information enters the energy-saving state. The subscription request is used to instruct the MME to send a report message to the PCRF when determining that the user equipment is in a power-saving state.

The message sending module 803 is configured to send a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state.

Optionally, the message sending module 803 is specifically configured to send a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state, where the indication information is further used to indicate that the traffic classifier sends the information to the application server. a notification message, the notification message is used to indicate that the application server stops sending the downlink data, and the indication information is further used to indicate that the traffic classifier sends the downlink data and the data transmission indication to the cache device, where the data transmission indication is used to indicate that the cache device is at the user equipment. After moving out of the energy saving state Send the downlink data to the user equipment.

Since the cache device needs to determine when the user equipment moves out of the power saving state, the response message further includes the remaining time of the power saving state of the user equipment. The remaining duration of the energy-saving state refers to the remaining duration from the current time to the time when the user equipment moves out of the energy-saving state. For example, when the user equipment has left the power saving state for 30 minutes from the current time, the remaining time of the energy saving state is determined to be 30 minutes.

When the querier device is the MME, the present embodiment provides two methods for calculating the remaining duration of the energy-saving state. In the first method, the MME obtains the current time and the next time the user equipment moves out of the energy-saving state, and subtracts the removal time. At the current time, the remaining time of the energy saving state is obtained, and the remaining time of the energy saving state is added to the response message, so that the flow classifier reads the remaining time of the energy saving state in the response message; in the second method, the MME determines that the user equipment enters the energy saving state. The entry time and the total energy saving time of the user equipment, adding the entry time and the total energy saving time to the response message, so that the flow classifier subtracts the current time from the entry time, obtains the energy saving state duration, and subtracts the total energy saving time from the energy saving state. The duration is long and the remaining time of the energy saving state is obtained.

When the queried device is a PCRF, the present embodiment provides two methods for calculating the remaining duration of the energy-saving state. In the first method, the MME obtains the current time and the next time the user equipment moves out of the energy-saving state, and subtracts the removal time. At the current time, the remaining time of the energy-saving state is obtained, and the remaining time of the energy-saving state is added to the report message, so that the PCRF adds the remaining time of the energy-saving state in the report message to the response message, and the flow classifier reads the remaining state of the energy-saving state in the response message. In the second method, the MME determines the entry time of the user equipment to enter the energy-saving state and the total energy-saving time of the user equipment, and adds the entry time and the total energy-saving duration to the report message, so that the PCRF adds the entry time and the total energy-saving time. In the response message, the flow classifier subtracts the entry time from the current time, obtains the duration of the energy-saving state, subtracts the total energy-saving duration from the duration of the energy-saving state, and obtains the remaining duration of the energy-saving state; or, so that the PCRF subtracts the current time from the entry time. , get the energy saving state for a long time, and reduce the total energy saving time by energy saving The duration of the state is obtained, and the remaining time of the energy saving state is obtained, and the remaining time of the energy saving state is added to the response message, and the flow classifier reads the remaining time of the energy saving state in the response message.

In the implementation, the second query interface may be added to the protocol of the query device, so that the query device can query the user equipment after receiving the status query request sent by the flow classifier through the second query interface. The state in which the user device is located is returned to the flow classifier through the second query interface.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention receives a status query request that includes the identifier information of the user equipment, and the status query request is used to request to acquire the state of the user equipment; The status query request determines that the user equipment is in a power-saving state, and sends a response message to the flow classifier, where the response message includes indication information indicating that the user equipment is in a power-saving state, and may send, to the flow classifier, indication information that the user equipment is in a power-saving state, The indication information indicates that the flow classifier sends the notification message to the application server, and sends the downlink data and the data transmission indication to the cache device, so that the downlink data is sent to the user equipment when the user equipment is in the power saving state, and the downlink data is discarded. The problem that the application server uses a large amount of network resources caused by sending the downlink data next time can save network resources.

In addition, the response message further includes the remaining time of the energy-saving state of the user equipment, and the cache device can accurately determine the time when the user equipment moves out of the energy-saving state according to the remaining time of the energy-saving state, and can solve the downlink caused by the error of the determined user equipment moving out of the energy-saving state. The problem of data transmission failure can achieve the effect of improving the success rate of downlink data transmission.

Referring to FIG. 9, a flowchart of a method for downlink data transmission according to an embodiment of the present invention is shown. The downlink data transmission method can be applied to a flow classifier, and the downlink data transmission method can include:

Step 901: The flow classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server.

Step 902: The flow classifier determines, according to the identifier information of the user equipment, that the user equipment is in a power saving state.

Step 903: The flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier.

Step 904: The flow classifier sends a downlink data and a data sending indication to the cache device, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

In summary, the downlink data transmission method provided by the embodiment of the present invention determines that the user equipment is in a power-saving state, and sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier; And sending a downlink data and a data sending indication, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state. The user equipment is configured to prevent the application server from transmitting the downlink data again, and the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, so that the downlink data is discarded when the user equipment is in the power saving state, and the application server is discarded. The problem of consuming a large amount of network resources caused by resending the downlink data can achieve the effect of saving network resources.

Please refer to FIG. 10, which is a flowchart of still another method for downlink data transmission according to an embodiment of the present invention. The downlink data transmission method can be applied to a flow classifier, and the downlink data transmission method can include:

In step 1001, the flow classifier obtains the identification information of the user equipment according to the downlink data sent by the application server.

When the identifier information of the user equipment is obtained, the identifier information of the user equipment is the identity ID of the user equipment. The traffic classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server, where the traffic classifier obtains the downlink data. The ID of the user equipment, the downlink data includes the ID of the user equipment; or the traffic classifier obtains the quintuple information of the downlink data from the downlink data, determines the ID of the user equipment according to the quintuple information, and the downlink data includes the quintuple information;

or,

The identifier information of the user equipment is the destination Internet Protocol (IP) IP address of the downlink data, and the traffic classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server, including: the traffic classifier obtains the quintuple information of the downlink data from the downlink data. Determining a destination IP address according to the quintuple information, and the downlink data includes quintuple information;

or,

The identifier information of the user equipment is the quintuple information of the downlink data, and the traffic classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server, where the traffic classifier obtains the quintuple information from the downlink data, and the downlink data includes Five-tuple information.

Specifically, the flow of the flow classifier to obtain the identification information of the user equipment is detailed in the description in the embodiment shown in FIG. 4, and details are not described herein.

Step 1002: The flow classifier determines, according to the downlink data, that the user equipment supports the energy saving state.

When the user equipment is in the power-saving state, the signaling and data sent by the network to the user equipment cannot reach the user equipment. Therefore, in order to avoid sending downlink data to the user equipment that is in the energy-saving state, The downlink data is lost after being transmitted through the service chain and the core network, and the application server needs to send the downlink data again to cause a large network load problem. Before the traffic classifier sends the downlink data to the user equipment, it is necessary to determine whether the user equipment is In a state of energy saving.

Further, before determining whether the user equipment is in a power saving state, the flow classifier also needs to determine whether the user equipment supports the energy saving state. If the traffic classifier determines that the user equipment supports the energy-saving state, it needs to query the state of the user equipment before sending the downlink data; if the traffic classifier determines that the user equipment does not support the energy-saving state, it indicates that the user equipment can directly send the downlink data. The next network element is given to save the signaling consumed by the state in which the user equipment is queried.

Step 1003: The flow classifier determines, according to the identifier information of the user equipment, that the user equipment is in a power saving state.

If the flow classifier determines that the user equipment is in the energy-saving state according to the identification information of the user equipment, proceed to step 1004. If the traffic classifier determines that the user equipment is not in the energy-saving state according to the identification information of the user equipment, the current downlink is performed according to the existing downlink. The data transmission process transmits the downlink data, which is not described in this embodiment.

Specifically, the flow classifier determines that the user equipment is in a power saving state according to the identifier information of the user equipment, including:

1) The flow classifier sends a status query request including the identifier information of the user equipment to the query device, where the status query request is used to request to obtain the state in which the user equipment is located;

2) The flow classifier receives the response message returned by the query device according to the status query request, and the response message includes indication information indicating that the user equipment is in the power saving state;

The query device is an MME or a PCRF.

In the implementation, the first query interface may be added to the protocol of the flow classifier, so that the flow classifier receives the response message returned by the query device through the first query interface after sending the status query request to the query device through the first query interface. . The specific query flow is detailed in the description in the embodiment shown in FIG. 4, I will not go into details.

Step 1004: The flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier.

Step 1005: The flow classifier sends a downlink data and a data sending indication to the cache device, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Specifically, the response message further includes the remaining time duration of the energy-saving state of the user equipment, and the flow classifier sends the downlink data and the data transmission indication to the cache device, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the energy-saving state. The user equipment includes: the flow classifier sends the downlink data, the remaining time of the energy-saving state, and the data transmission indication to the cache device, where the data transmission indication is used to indicate that the cache device waits for the duration of the remaining time of the energy-saving state of the user equipment, and then downlink data. Sent to the user device.

Since the cache device needs to send the downlink data to the user equipment after the user equipment moves out of the power saving state, the cache device also needs to determine when the user equipment moves out of the power saving state. The time when the user equipment moves out of the energy-saving state may be represented by the remaining duration of the user energy-saving state, where the remaining duration of the energy-saving state refers to the remaining duration from the current time to the user equipment moving out of the energy-saving state. The calculation process of the remaining time of the energy-saving state is detailed in the description in the embodiment shown in FIG. 4, and details are not described herein.

The cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data. That is, when buffering downlink data, the flow classifier can send downlink data to the gateway, which is cached by the gateway. Row data; the downlink data may also be sent to the service chain enabling unit, and the service chain enabling unit buffers the downlink data. The specific sending process is detailed in the description in the embodiment shown in FIG. 4, and details are not described herein.

In this embodiment, the flow classifier may first send a notification message to the application server, and then send the downlink data and the data transmission indication to the cache device. The downlink data and the data transmission indication may be sent to the cache device, and then the notification message is sent to the application server. The downlink data and the data transmission indication may be sent to the cache device at the same time as the notification message is sent to the application server. This embodiment does not limit the sequence.

Referring to FIG. 11, a flowchart of still another method for downlink data transmission according to an embodiment of the present invention is shown. The downlink data transmission method may be applied to a cache device, and the downlink data transmission method may include:

Step 1101: The cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, including: the cache device receives the traffic classification. The downlink data and the data transmission indication sent by the device are sent after the traffic classifier determines that the user equipment is in the power saving state, wherein the user equipment is in the power saving state and further indicates that the traffic classifier sends the notification message to the application server. The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier.

Optionally, the cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, including: the cache device receives the traffic classification. The downlink data and the data transmission indication sent by the device, the downlink data and the data transmission indication are sent after the traffic classifier sends the notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink to the traffic classifier. Data, the data sending indication is used to instruct the cache device to send downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, including: the cache device receives the traffic classification. The downlink data and the data transmission indication sent by the device, the downlink data and the data transmission indication are sent before the traffic classifier sends the notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink to the traffic classifier. Data, the data sending indication is used to instruct the cache device to send downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, including: the cache device receives the traffic classification. The downlink data and the data transmission indication sent by the device are sent at the same time that the flow classifier sends the notification message to the application server, where the notification message is used to instruct the application server to stop sending the identifier to the traffic classifier. The downlink data is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Step 1102: The cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication.

In summary, the downlink data transmission method provided by the embodiment of the present invention receives the downlink data and the data transmission indication sent by the flow classifier, and sends the downlink data to the user equipment after the user equipment moves out of the energy-saving state according to the data transmission indication. After the user equipment moves out of the energy-saving state, the downlink data is sent to the user equipment instead of discarding the downlink data, and the flow classifier sends a notification message to the application server to instruct the application server to stop sending the downlink data, which can be solved in the user equipment. When the energy is saved, the downstream data is discarded, and the application server sends the downlink data again to occupy a large amount of network resources, which can save network resources.

Referring to FIG. 12, a flowchart of still another method for downlink data transmission according to an embodiment of the present invention is shown. The downlink data transmission method may be applied to a cache device, and the downlink data transmission method may include:

Step 1201: The cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, where the cache device is the gateway or the downlink data corresponds to The business chain enable unit in the business chain.

Optionally, the cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, including: the cache device receives the traffic classification. Downlink data and data transmission indication sent by the device, the downlink data and the data transmission indication are sent simultaneously when the flow classifier sends the notification message to the application server The notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Since the cache device needs to send the downlink data to the user equipment after the user equipment moves out of the power saving state, the cache device also needs to determine when the user equipment moves out of the power saving state. The time when the user equipment moves out of the energy-saving state may be represented by the remaining duration of the user energy-saving state, where the remaining duration of the energy-saving state refers to the remaining duration from the current time to the user equipment moving out of the energy-saving state. Therefore, the cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, and the cache device receives the sent by the traffic classifier. The downlink data, the remaining time of the energy-saving state, and the data transmission indication are used to indicate that the cache device sends the downlink data to the user equipment after waiting for the duration corresponding to the remaining time of the energy-saving state of the user equipment.

Step 1202: The cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention receives the downlink data and the data transmission indication sent by the flow classifier, and sends the downlink data to the user equipment after the user equipment moves out of the energy-saving state according to the data transmission indication. After the user equipment moves out of the energy-saving state, the downlink data is sent to the user equipment instead of discarding the downlink data, and the flow classifier sends a notification message to the application server to instruct the application server to stop sending the downlink data, which can be solved in the user equipment. When the energy is saved, the downlink data is discarded, and the application server sends the downlink data again. The problem of network resources can achieve the effect of saving network resources.

Referring to FIG. 13, a flowchart of still another method for downlink data transmission according to an embodiment of the present invention is shown. The downlink data transmission method may be applied to the query device, and the downlink data transmission method may include:

Step 1301: The querying device receives a status query request that is sent by the flow classifier and includes identifier information of the user equipment, where the status query request is used to request to acquire a state in which the user equipment is located.

Step 1302: The querying device determines, according to the status query request, that the user equipment is in a power saving state.

Step 1303: The querying device sends a response message to the flow classifier, where the response message includes indication information indicating that the user equipment is in a power saving state.

Optionally, the querying device sends a response message to the traffic classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state, and the method includes: the querying device sends a response message to the traffic classifier, where the response message includes The indication information is used to indicate that the traffic classifier sends a notification message to the application server, where the notification message is used to indicate that the application server stops sending the downlink data. The indication information is further used to indicate that the traffic classifier is The cache device sends the downlink data and the data sending indication, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

In summary, the downlink data transmission method provided by the embodiment of the present invention receives a status query request that includes the identifier information of the user equipment, and the status query request is used to request to acquire the state of the user equipment; a status query request, determining that the user equipment is in a power saving state; sending a response message to the flow classifier, the response message including an indication indicating that the user equipment is in a power saving state The information may be sent to the flow classifier to indicate that the user equipment is in a power-saving state, and the indication information is used to indicate that the traffic classifier sends a notification message to the application server, and sends the downlink data and the data transmission indication to the cache device, where the user equipment is located. When the power-saving state is sent to the user equipment, the downlink data is discarded, and the application server uses the downlink data to transmit a large amount of network resources, which can save network resources.

Referring to FIG. 14, a flowchart of still another method for downlink data transmission according to an embodiment of the present invention is shown. The downlink data transmission method may be applied to the query device, and the downlink data transmission method may include:

Step 1401: The querying device receives a status query request that is sent by the traffic classifier and includes identifier information of the user equipment, where the status query request is used to request to obtain a state in which the user equipment is located.

Step 1402: The querying device determines, according to the status query request, that the user equipment is in a power saving state.

In this embodiment, the query device may be an MME or a PCRF. When the querying device is the MME, the flow of querying the state of the user equipment by the MME is detailed in the description in the embodiment shown in FIG. 8. When the querying device is a PCRF, the querying device determines, according to the status query request, that the user equipment is in a power saving state, including:

1) The querying device obtains the report message associated with the user equipment according to the status query request, and the report message is sent by the MME to the query device when determining that the user equipment is in the energy-saving state;

2) The querying device determines that the user equipment is in a power-saving state according to the reported message.

Optionally, the querying device determines, according to the status query request, that the user equipment is in a power saving state, and the method further includes:

The querying device sends a subscription request to the MME, where the subscription request includes the identifier information of the user equipment, and the subscription request is used to request the MME to send a report message to the querying device when determining that the user equipment is in the power-saving state.

Specifically, the user equipment sends a power saving status report request to the PCRF when the IP-CAN session is established. The power saving status report request includes the identifier information of the user equipment, and is used to instruct the PCRF to subscribe to the MME. The PCRF generates a subscription request according to the identifier information, and forwards the subscription request to the MME through the PGW or other device. After receiving the subscription request, the MME sends a report message to the PCRF after the user equipment identified by the identifier information enters the energy-saving state. The subscription request is used to instruct the MME to send a report message to the PCRF when determining that the user equipment is in a power-saving state.

In step 1403, the querying device sends a response message to the traffic classifier, where the response message includes indication information indicating that the user equipment is in a power-saving state, and the response message further includes a remaining duration of the energy-saving state of the user equipment.

After the querying device determines that the user equipment is in the power saving state, the indication information for indicating that the user equipment is in the power saving state is generated, and the indication information is added to the response message and sent to the flow classifier. After determining that the user equipment is in the power-saving state, the traffic classifier sends a notification message to the application server, and sends the downlink data and the data transmission indication to the cache device. After the user equipment moves out of the energy-saving state, the cache device sends the downlink data to the user equipment.

Since the cache device needs to determine when the user equipment moves out of the power saving state, the response message is also Contains the remaining time of the power saving state of the user equipment. The remaining duration of the energy-saving state refers to the remaining duration from the current time to the time when the user equipment moves out of the energy-saving state. The process of calculating the remaining duration of the energy-saving state is detailed in the description in the embodiment shown in FIG. 8, and details are not described herein.

In the implementation, the second query interface may be added to the protocol of the query device, so that after receiving the status query request sent by the flow classifier through the second query interface, the query device may query the state of the user equipment and pass the The second query interface returns the state in which the user equipment is located to the stream classifier.

Referring to FIG. 15, a flowchart of still another method for downlink data transmission according to an embodiment of the present invention is shown. The downlink data transmission method can be applied to a downlink data transmission system, and the downlink data transmission method can include:

Step 1501: The flow classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server.

Step 1502: The querying device receives a status query request that is sent by the flow classifier and includes identifier information of the user equipment, where the status query request is used to request to obtain a state in which the user equipment is located.

Step 1503: The querying device determines, according to the status query request, that the user equipment is in a power saving state.

Step 1504: The querying device sends a response message to the flow classifier, where the response message includes indication information indicating that the user equipment is in a power saving state.

Step 1505: The flow classifier determines, according to the identifier information of the user equipment, that the user equipment is in a power-saving state. state.

Step 1506: The flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier.

Step 1507: The flow classifier sends a downlink data and a data sending indication to the cache device, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Step 1508: The cache device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Step 1509: The cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication.

For details, the process of transmitting downlink data between the traffic classifier, the query device, and the cache device is described in detail in the embodiments shown in FIG. 9 to FIG. 14 , and details are not described herein.

First, the following describes the transmission method of the downlink data by using the state in which the traffic classifier does not have the service chain and the traffic classifier queries the MME for the MME. For example, refer to the flow chart of the first downlink data transmission shown in FIG.

Step 1601: The flow classifier receives downlink data sent by the application server.

Step 1602: The flow classifier detects, according to characteristics of the downlink data, whether the user equipment supports the energy saving state.

Step 1603: When detecting that the user equipment supports the energy-saving state, the traffic classifier queries the MME for the state of the user equipment through the gateway.

Step 1604, the MME sends a response message to the flow classifier when the user equipment is in the power-saving state, and the response message includes the indication information and the remaining time of the energy-saving state;

Step 1605: The flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data.

Step 1606: The flow classifier sends the downlink data, the remaining time of the energy saving state, and the data sending indication to the gateway according to the response message.

Step 1607: Start timing when receiving downlink data, and when the timing duration reaches the remaining time of the energy saving state, the gateway sends downlink data to the user equipment.

Second, the following describes the transmission method of the downlink data by using the state in which the traffic classifier does not have the service chain and the traffic classifier queries the PCRF for the user equipment. For example, refer to the second downlink data transmission shown in FIG. Process diagram:

Step 1701: The PCRF receives the energy-saving status report request sent by the user equipment, where the energy-saving status report request includes the identifier information of the user equipment.

Step 1702: The PCRF sends a subscription request to the MME according to the energy-saving status report request, where the subscription request includes the identifier information of the user equipment.

Step 1703: When detecting that the user equipment is in a power-saving state, the MME sends a report message to the PCRF, where the report message includes the indication information and the remaining duration of the energy-saving state;

Step 1704: The flow classifier receives downlink data sent by the application server.

Step 1705: The flow classifier detects, according to characteristics of the downlink data, whether the user equipment supports the energy saving state.

Step 1706: When detecting that the user equipment supports the energy-saving state, the flow classifier sends a status query request to the PCRF, where the status query request includes the identifier information of the user equipment.

Step 1707, the PCRF sends a response message to the flow classifier when the user equipment is in the power-saving state according to the report message, where the response message includes the indication information and the remaining time of the energy-saving state;

Step 1708: The flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data.

Step 1709: The flow classifier sends the downlink data, the remaining time of the energy saving state, and the data sending indication to the gateway according to the response message.

Step 1710: Start timing when receiving downlink data, and when the timing duration reaches the remaining time of the energy saving state, the gateway sends downlink data to the user equipment.

The following describes the method for transmitting downlink data by using the service chain and the traffic classifier to query the MME for the status of the user equipment. For details, refer to the flowchart of the third downlink data transmission shown in FIG. 18.

Step 1801: The flow classifier receives downlink data sent by the application server.

Step 1802: The flow classifier detects, according to characteristics of the downlink data, whether the user equipment supports the energy saving state.

Step 1803, when detecting that the user equipment supports the energy-saving state, the traffic classifier queries the MME to check the state of the user equipment through the gateway.

Step 1804: When determining that the user equipment is in a power-saving state, the MME sends a response message to the traffic classifier, where the response message includes the indication information and the remaining duration of the energy-saving state;

Step 1805: The flow classifier sends a notification message to the application server, where the notification message is used to indicate that Stop sending the downlink data with the server;

Step 1806: The traffic classifier sends the downlink data, the remaining state of the energy saving state, and the data sending indication to the service chain enabling unit by using the service converting unit.

Step 1807: The service chain enabling unit buffers the downlink data and the remaining time of the power saving state and starts timing. When the time duration reaches the remaining time of the energy saving state, the downlink data is sent to the user equipment.

The following describes the method for transmitting the downlink data by using the service chain and the traffic classifier to query the status of the user equipment to the PCRF. For example, refer to the flowchart of the fourth downlink data transmission shown in FIG. 19:

Step 1901: The PCRF receives the energy-saving status report request sent by the user equipment, where the energy-saving status report request includes the identifier information of the user equipment.

Step 1902: The PCRF sends a subscription request to the MME according to the energy-saving status report request, where the subscription request includes the identifier information of the user equipment.

Step 1903: When detecting that the user equipment is in a power-saving state, the MME sends a report message to the PCRF, where the report message includes the indication information and the remaining duration of the energy-saving state;

Step 1904: The flow classifier receives downlink data sent by the application server.

Step 1905: The flow classifier detects, according to characteristics of the downlink data, whether the user equipment supports the energy-saving state.

Step 1906: When detecting that the user equipment supports the energy-saving state, the flow classifier sends a status query request to the PCRF, where the status query request includes the identifier information of the user equipment.

Step 1907, the PCRF sends a response message to the flow classifier when the user equipment is in the power-saving state according to the report message, where the response message includes the indication information and the remaining time of the energy-saving state;

Step 1908, the flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data.

Step 1909, the flow classifier sends the downlink data, the remaining state of the energy saving state, and the data sending indication to the service chain enabling unit by using the service converting unit.

In step 1910, the service chain enabling unit buffers the downlink data and the remaining time of the power saving state and starts timing. When the time duration reaches the remaining time of the energy saving state, the downlink data is sent to the user equipment.

Please refer to FIG. 20, which is a schematic structural diagram of a downlink data transmission apparatus according to an embodiment of the present invention. The downlink data transmission device may include a bus 2001, and a processor 2002, a memory 2003, a transmitter 2004, and a receiver 2005 connected to the bus 2001. The memory 2003 is used to store a number of instructions, which are configured to be executed by the processor 2002.

First, when the downlink data transmission device is applied to the stream classifier:

The processor 2002 is configured to obtain the identifier information of the user equipment according to the downlink data sent by the application server received by the receiver 2005, and determine that the user equipment is in the power saving state according to the identifier information of the user equipment.

When the user equipment is in the power-saving state, the signaling and data sent by the network to the user equipment cannot reach the user equipment. Therefore, in order to avoid sending downlink data to the user equipment that is in the energy-saving state, the downlink data is passed through the service chain. After the core network is lost, the application server needs to send the downlink data again. The network load is large. Before the traffic classifier sends downlink data to the user equipment, it is necessary to determine whether the user equipment is in a power-saving state.

The transmitter 2004 is configured to send a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier, and send the downlink data and the data sending indication to the cache device, where the data sending indication is used to indicate that the cache device is After the user equipment moves out of the power saving state, the downlink data is sent to the user equipment.

The flow classifier can determine the cache device after determining that the user equipment is in a power-saving state, and will downlink The data and data sending instructions are sent to the cache device, and the cache device caches the downlink data, and sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

In a first possible implementation manner, the transmitter 2004 is further configured to send, to the querying device, a status query request that includes the identifier information of the user equipment, where the status query request is used to request to acquire a state in which the user equipment is located;

The receiver 2005 is further configured to receive a response message that is sent by the querying device according to the status query request, where the response message includes indication information for indicating that the user equipment is in a power saving state;

The query device is an MME or a PCRF.

In the implementation, the first query interface may be added to the protocol of the flow classifier, so that the flow classifier receives the response message returned by the query device through the first query interface after sending the status query request to the query device through the first query interface. . The flow of the flow classifier querying the querying device for the state of the user equipment is described in detail in the embodiment shown in FIG. 4, and details are not described herein.

In a second possible implementation, the processor 2002 is further configured to determine, according to the downlink data, that the user equipment supports the energy-saving state before determining that the user equipment is in the power-saving state according to the identifier information of the user equipment.

In a third possible implementation manner, the response message further includes a remaining duration of the energy saving state of the user equipment, where the transmitter 2004 is configured to send the downlink data, the remaining state of the power saving state, and the data sending indication to the cache device, where the data is sent. The indication is used to indicate that the cache device sends the downlink data to the user equipment after waiting for the duration of the remaining time period of the power saving state of the user equipment.

Since the cache device needs to send the downlink data to the user equipment after the user equipment moves out of the power saving state, the cache device also needs to determine when the user equipment moves out of the power saving state. The time when the user equipment moves out of the energy-saving state may be represented by the remaining duration of the user energy-saving state, where the remaining duration of the energy-saving state refers to the remaining duration from the current time to the user equipment moving out of the energy-saving state. For details, the flow of the remaining time length of the energy classifier in the flow classifier is detailed in the description in the embodiment shown in FIG. 4, and details are not described herein.

In a fourth possible implementation manner, the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data.

When the downlink data is buffered, the flow classifier may send the downlink data to the gateway, and the gateway buffers the downlink data. The downlink data may also be sent to the service chain enabling unit, and the service chain enabling unit buffers the downlink data. In the implementation, the first cache interface may be added to the protocol of the flow classifier, so that after the flow classifier sends the downlink data, the remaining time of the power saving state, and the data sending indication to the cache device through the first cache interface, the cache device is waiting. After the remaining time of the energy saving state, the downlink data is sent to the user equipment.

In a fifth possible implementation,

The identification information of the user equipment is the identity ID of the user equipment. The processor 2002 is specifically configured to obtain the ID of the user equipment from the downlink data, where the downlink data includes the ID of the user equipment, or is specifically used to obtain the downlink data. The quintuple information of the downlink data, the ID of the user equipment is determined according to the quintuple information, and the downlink data includes quintuple information;

or,

The identifier information of the user equipment is the destination Internet Protocol IP address of the downlink data, and the processor 2002 is specifically configured to obtain the quintuple information of the downlink data from the downlink data, and determine the destination IP address according to the quintuple information, where the downlink data includes Quintuple information;

or,

The identifier information of the user equipment is quintuple information of the downlink data, and the processor 2002 is specifically configured to obtain quintuple information from the downlink data, where the downlink data includes quintuple information.

For details, the flow of the device identifier of the user equipment is as described in the embodiment shown in FIG. 4, and details are not described herein.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention determines that the user equipment is in a power-saving state, and sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending downlink data to the classifier; Sending a downlink data and a data sending indication, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state, so that the application server does not send the downlink data again, and the cache device is removed from the user equipment. After the energy saving state is sent to the user equipment, the downlink data is discarded, and the downlink data is discarded when the user equipment is in the power saving state, and the application server uses the downlink data to use a large amount of network resources, which can save network resources. Effect. In addition, before determining that the user equipment is in a power-saving state according to the downlink data, the user equipment supports the energy-saving state according to the downlink data, and may not query the state of the user equipment when determining that the user equipment does not support the energy-saving state. To save the signaling consumed by the state in which the user equipment is queried.

Second, when the downlink data transmission device is applied to the cache device:

The receiver 2005 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiver 2005 is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent after the traffic classifier determines that the user equipment is in a power saving state, where the user equipment The energy-saving state further indicates that the traffic classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier.

Optionally, the receiver 2005 is configured to receive downlink data and a data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent after the traffic classifier sends the notification message to the application server, where the notification is sent. The message is used to indicate that the application server stops sending the downlink data to the traffic classifier, and the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiver 2005 is configured to receive downlink data and a data sending indication sent by the traffic classifier, where the downlink data and the data sending indication are sent before the traffic classifier sends the notification message to the application server, where the notification is sent. The message is used to indicate that the application server stops sending the downlink data to the traffic classifier, and the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

Optionally, the receiver 2005 is specifically configured to receive downlink data and data sent by the traffic classifier. And indicating that the downlink data and the data sending indication are sent by the traffic classifier to send the notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the traffic classifier, where the data sending indication is used The instructing the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state.

The transmitter 2004 is configured to send downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication.

After receiving the data sending indication, the cache device buffers the downlink data according to the data sending indication, and sends the downlink data to the user equipment after determining that the user equipment moves out of the energy saving state.

In a first possible implementation, the receiver 2005 is configured to receive downlink data, a power saving state remaining duration, and a data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device is waiting for the energy saving state of the user equipment. After the duration corresponding to the remaining duration, the downlink data is sent to the user equipment.

Since the cache device needs to send the downlink data to the user equipment after the user equipment moves out of the power saving state, the cache device also needs to determine when the user equipment moves out of the power saving state. The time when the user equipment moves out of the energy-saving state may be represented by the remaining duration of the user energy-saving state, where the remaining duration of the energy-saving state refers to the remaining duration from the current time to the user equipment moving out of the energy-saving state. Specifically, the process for the cache device to obtain the remaining duration of the energy-saving state is detailed in the description in the embodiment shown in FIG. 6, and details are not described herein.

In a second possible implementation manner, the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data. Specifically, when there is a service chain corresponding to the downlink data, the cache device is a service chain enabling unit in the service chain corresponding to the downlink data; when there is no service chain corresponding to the downlink data, the cache device is a gateway.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention receives the downlink data and the data transmission indication sent by the flow classifier; and removes the energy-saving state from the user equipment according to the data transmission indication. The downlink data is sent to the user equipment, and after the user equipment moves out of the power saving state, the downlink data is sent to the user equipment instead of discarding the downlink data, and the flow classifier sends a notification message to the application server to instruct the application server to stop sending. The downlink data can solve the problem that the downlink data is discarded when the user equipment is in the energy-saving state, and the application server uses the downlink data to occupy a large amount of network resources, which can save network resources. In addition, the downlink data, the power saving state remaining duration, and the data sending indication sent by the traffic classifier are used, and the data sending indication is used to indicate that the cache device waits for the duration corresponding to the remaining time of the energy saving state of the user equipment, and sends the downlink data to the downlink data. The user equipment can accurately determine the time when the user equipment moves out of the energy-saving state according to the remaining time of the energy-saving state, and can solve the problem that the determined downlink data transmission failure occurs due to the time when the user equipment moves out of the energy-saving state, and the downlink data transmission success can be improved. The effect of the rate.

Third, when the downlink data transmission device is applied to the query device:

The receiver 2005 is configured to receive a status query request that is sent by the flow classifier and includes identifier information of the user equipment, where the status query request is used to request to obtain a status of the user equipment.

The processor 2002 is configured to query the device to determine that the user equipment is in a power saving state according to the status query request.

The transmitter 2004 is configured to send a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state.

Optionally, the transmitter 2004 is configured to send a response message to the flow classifier, where the response message includes indication information for indicating that the user equipment is in a power saving state, and the indication information is further used to indicate that the traffic classifier sends a notification to the application server. a message, the notification message is used to indicate that the application server stops sending the downlink data, and the indication information is further used to indicate that the traffic classifier sends the downlink data and the data sending indication to the cache device, where the data sending indication is used to indicate that the cache device is removed from the user equipment. After the energy saving state, the downlink data is sent to the user equipment.

The traffic classifier may first send a notification message to the application server, and then send the notification message to the cache device. Line data and data transmission indication; may also send downlink data and data transmission indication to the cache device, and then send a notification message to the application server; and may also send downlink data and data transmission to the cache device while sending the notification message to the application server. It is indicated that this embodiment does not limit the order.

In a first possible implementation manner, the response message further includes a remaining duration of the energy saving state of the user equipment.

Since the cache device needs to determine when the user equipment moves out of the power saving state, the response message further includes the remaining time of the power saving state of the user equipment. The remaining duration of the energy-saving state refers to the remaining duration from the current time to the time when the user equipment moves out of the energy-saving state. Specifically, the process for the query device to obtain the remaining duration of the energy-saving state is detailed in the description in the embodiment shown in FIG. 8 , and details are not described herein.

In this embodiment, when the querying device is the MME, the flow of the MME querying the state of the user equipment is as described in the embodiment shown in FIG. 8; when the querying device is the PCRF, the PCRF queries the state of the user equipment. The flow is described by the second possible implementation and the third possible implementation below.

In a second possible implementation manner, the processor 2002 is configured to obtain, according to the status query request, a report message that is associated with the user equipment, where the report message is sent by the MME to the query device when determining that the user equipment is in a power-saving state; Report the message to determine that the user equipment is in a power-saving state.

In a third possible implementation, the transmitter 2004 is further configured by the processor 2002 to determine, according to the status query request, that the user equipment is in a power-saving state, and send a subscription request to the MME, where the subscription request includes the identifier information of the user equipment, and the subscription The request is used to request the MME to send a report message to the querying device when determining that the user equipment is in a power saving state.

In summary, the downlink data transmission apparatus provided by the embodiment of the present invention receives a status query request that includes the identifier information of the user equipment, and the status query request is used to request to acquire the state of the user equipment; The status query request determines that the user equipment is in a power-saving state, and sends a response message to the flow classifier, where the response message includes indication information indicating that the user equipment is in a power-saving state, and may send, to the flow classifier, indication information that the user equipment is in a power-saving state, The indication information indicates that the flow classifier sends the notification message to the application server, and sends the downlink data and the data transmission indication to the cache device, so that the downlink data is sent to the user equipment when the user equipment is in the power saving state, and the downlink data is discarded. The problem that the application server uses a large amount of network resources caused by sending the downlink data next time can save network resources. In addition, the response message further includes the remaining time of the energy-saving state of the user equipment, and the cache device can accurately determine the time when the user equipment moves out of the energy-saving state according to the remaining time of the energy-saving state, and can solve the downlink caused by the error of the determined user equipment moving out of the energy-saving state. The problem of data transmission failure can achieve the effect of improving the success rate of downlink data transmission.

It should be noted that the downlink data transmission apparatus provided by the foregoing embodiment is only illustrated by the division of the foregoing functional modules when performing downlink data transmission. In actual applications, the foregoing functions may be allocated by different functional modules according to requirements. Upon completion, the internal structure of the downlink data transmission device is divided into different functional modules to complete all or part of the functions described above. In addition, the downlink data transmission device and the downlink data transmission method embodiment are provided in the same concept, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. achieve. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit may be only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

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

The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of within the technical scope disclosed by the present invention. Variations or substitutions are intended to be covered by the scope of the invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

A downlink data transmission device, characterized in that the device comprises:

An identifier obtaining module, configured to acquire identifier information of the user equipment according to the downlink data sent by the application server;

a state determining module, configured to determine, according to the identifier information of the user equipment acquired by the identifier obtaining module, that the user equipment is in a power saving state;

a message sending module, configured to send a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the classifier;

a cache indication module, configured to send the downlink data and a data sending indication to the cache device, where the data sending indication is used to instruct the cache device to send the downlink data to the user after the user equipment moves out of a power saving state device.
The apparatus according to claim 1, wherein the status determining module is configured to send a status query request including the identification information of the user equipment to the querying device, where the status query request is used to request to acquire the user. a status of the device; receiving, by the query device, a response message returned according to the status query request, where the response message includes indication information indicating that the user equipment is in a power saving state;

The querying device is a mobility management network element MME or a policy and charging control unit PCRF.
The device according to claim 2, wherein the response message further includes a remaining time duration of the power saving state of the user equipment, and the buffer indication module is configured to use the downlink data, the remaining state of the energy saving state, and And the data sending indication is sent to the cache device, where the data sending indication is used to indicate that the cache device sends the downlink data to the time length after waiting for a duration corresponding to a remaining time of the energy saving state of the user equipment. User equipment.
The device according to any one of claims 1-3, wherein the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data.
The device according to any one of claims 1 to 4, wherein the device further comprises:

And a function determining module, configured to determine, according to the downlink data, that the user equipment supports an energy-saving state, before the state determining module determines that the user equipment is in a power-saving state according to the identifier information of the user equipment.
Apparatus according to any one of claims 1 to 5, wherein

The identifier information of the user equipment is an identity identifier of the user equipment; the identifier obtaining module is specifically configured to acquire an ID of the user equipment from the downlink data, where the downlink data includes the user equipment Or the quintuple information of the downlink data is obtained from the downlink data, and the ID of the user equipment is determined according to the quintuple information, where the downlink data includes the quintuple information;

or,

The identifier information of the user equipment is the destination Internet Protocol (IP) IP address of the downlink data, and the identifier obtaining module is specifically configured to obtain the quintuple information of the downlink data from the downlink data, according to the five The tuple information determines the destination IP address, and the downlink data includes the quintuple information;

or,

The identifier information of the user equipment is the quintuple information of the downlink data, and the identifier obtaining module is specifically configured to obtain the quintuple information from the downlink data, where the downlink data includes the five Tuple information.
A downlink data transmission device, characterized in that the device comprises:

The receiving module is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device sends the downlink data to the user equipment after the user equipment moves out of the power saving state;

The data sending module is configured to send the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication received by the receiving module.
The device according to claim 7, wherein the indication receiving module is configured to receive downlink data, a power saving state remaining duration, and a data sending indication sent by the traffic classifier, where the data sending indication is used for indicating The buffering device sends the downlink data to the user equipment after waiting for a duration corresponding to a remaining duration of the energy-saving state of the user equipment.
The device according to claim 7 or 8, wherein the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data.
A downlink data transmission method, characterized in that the method comprises:

The traffic classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server.

Determining, by the flow classifier, that the user equipment is in a power saving state according to the identifier information of the user equipment;

The flow classifier sends a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the classifier;

The flow classifier sends the downlink data and the data transmission indication to the cache device, where the data transmission indication is used to instruct the cache device to send the downlink data to the user equipment after the user equipment moves out of the power saving state. .
The method according to claim 10, wherein the determining, by the flow classifier, that the user equipment is in a power saving state according to the identifier information of the user equipment comprises:

The flow classifier sends a status query request including the identifier information of the user equipment to the querying device, where the status query request is used to request to obtain the state in which the user equipment is located;

The flow classifier receives the response message returned by the querying device according to the status query request, and the response message includes indication information for indicating that the user equipment is in a power saving state;

The querying device is a mobility management network element MME or a policy and charging control unit PCRF.
The method according to claim 11, wherein the response message further includes a remaining duration of the power saving state of the user equipment, and the flow classifier sends the downlink data and a data transmission indication to the cache device, And the sending the downlink data to the user equipment after the user equipment moves out of the power saving state, where the data sending indication is used to:

The flow classifier sends the downlink data, the remaining time duration of the power saving state, and the data sending indication to the cache device, where the data sending indication is used to indicate that the cache device is waiting for energy saving of the user equipment. After the duration of the remaining time of the state, the downlink data is sent to the user equipment.
The method according to any one of claims 10 to 12, wherein the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data.
The method according to any one of claims 10 to 13, wherein the flow classifier, before determining that the user equipment is in a power saving state, according to the identification information of the user equipment, further includes:

The flow classifier determines, according to the downlink data, that the user equipment supports a power saving state.
A method according to any one of claims 10-14, wherein

The identifier information of the user equipment is the identity identifier of the user equipment; the obtaining, by the traffic classifier, the identifier information of the user equipment according to the downlink data sent by the application server, includes: the traffic classifier from the downlink data Obtaining an ID of the user equipment, where the downlink data includes an ID of the user equipment; or, the flow classifier obtains quintuple information of the downlink data from the downlink data, according to the quintuple Determining an ID of the user equipment, where the downlink data includes the quintuple information;

or,

The identifier information of the user equipment is the destination Internet Protocol (IP) IP address of the downlink data, and the traffic classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server, including: the traffic classifier from the downlink Obtaining the quintuple information of the downlink data in the data, determining the destination IP address according to the quintuple information, where the downlink data includes the quintuple information;

or,

And the identifier information of the user equipment is the quintuple information of the downlink data, where the traffic classifier obtains the identifier information of the user equipment according to the downlink data sent by the application server, where the traffic classifier uses the downlink data from the downlink data. Obtaining the quintuple information, where the downlink data includes the quintuple information.
A downlink data transmission method, characterized in that the method comprises:

The buffering device receives the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to instruct the cache device to send the downlink data to the user equipment after the user equipment moves out of the power saving state;

And the buffering device sends the downlink data to the user equipment after the user equipment moves out of the power saving state according to the data sending indication.
The method according to claim 16, wherein the cache device receives downlink data and a data transmission indication sent by the traffic classifier, where the data transmission indication is used to indicate that the cache device is to be removed after the user equipment moves out of the power saving state. Sending the downlink data to the user equipment includes:

The buffering device receives the downlink data, the power saving state remaining duration, and the data sending indication sent by the traffic classifier, where the data sending indication is used to indicate that the cache device waits for the remaining time of the energy saving state of the user equipment. After the duration, the downlink data is sent to the user equipment.
The method according to claim 16 or 17, wherein the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data.
A downlink data transmission apparatus for use in a stream classifier, the apparatus comprising: a bus, and a processor, a memory, a transmitter, and a receiver connected to the bus. Wherein the memory is for storing a plurality of instructions, the instructions being configured to be executed by the processor;

The processor is configured to obtain, according to the downlink data sent by the application server, the identifier information of the user equipment, and determine, according to the identifier information of the user equipment, that the user equipment is in a power saving state;

The transmitter is configured to send a notification message to the application server, where the notification message is used to instruct the application server to stop sending the downlink data to the classifier; and send the downlink data and data transmission to a cache device. Instructing, the data sending indication is used to instruct the cache device to send the downlink data to the user equipment after the user equipment moves out of a power saving state.
The device according to claim 19, characterized in that

The transmitter is further configured to send, to the querying device, a status query request that includes the identifier information of the user equipment, where the status query request is used to request to acquire a state in which the user equipment is located;

The receiver is further configured to receive a response message that is returned by the querying device according to the status query request, where the response message includes indication information that is used to indicate that the user equipment is in a power saving state;

The querying device is a mobility management network element MME or a policy and charging control unit PCRF.
The device according to claim 20, wherein the response message further includes a remaining duration of the energy-saving state of the user equipment, and the transmitter is specifically configured to use the downlink data, the remaining duration of the energy-saving state, and the Sending a data sending indication to the cache device, the data sending indication The downlink data is sent to the user equipment after the length of time required by the cache device to wait for the remaining time of the energy-saving state of the user equipment.
The device according to any one of claims 19 to 21, wherein the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data.
The device according to any one of claims 19 to 22, wherein the processor is further configured to: before determining, according to the identification information of the user equipment, that the user equipment is in a power saving state, according to the downlink The data determines that the user equipment supports a power saving state.
Apparatus according to any one of claims 19-23, wherein

The identifier information of the user equipment is an identity identifier of the user equipment; the processor is specifically configured to acquire an ID of the user equipment from the downlink data, where the downlink data includes the user equipment Or the quintuple information obtained by acquiring the downlink data from the downlink data, determining an ID of the user equipment according to the quintuple information, where the downlink data includes the quintuple information ;

or,

The identifier information of the user equipment is the destination Internet Protocol (IP) IP address of the downlink data, and the processor is specifically configured to obtain the quintuple information of the downlink data from the downlink data, according to the five-element The group information determines the destination IP address, and the downlink data includes the quintuple information;

or,

The identifier information of the user equipment is the quintuple information of the downlink data, where the processor is specifically configured to obtain the quintuple information from the downlink data, where the downlink data includes the five-element Group information. .
A downstream data transmission apparatus for use in a cache device, the apparatus comprising: a bus, and a processor, a memory, a transmitter, and a receiver connected to the bus. Wherein the memory is for storing a plurality of instructions, the instructions being configured to be executed by the processor;

The receiver is configured to receive the downlink data and the data sending indication sent by the traffic classifier, where the data sending indication is used to instruct the cache device to send the downlink data to the user equipment after the user equipment moves out of the power saving state. ;

The transmitter is configured to send the downlink data to the user equipment after the user equipment moves out of a power saving state according to the data sending indication.
The device according to claim 25, wherein the buffer device receives the downlink data and the data transmission indication sent by the traffic classifier, and the receiver is specifically configured to receive the downlink data sent by the traffic classifier and save energy. And a data transmission indication, where the data transmission indication is used to indicate that the cache device sends the downlink data to the user equipment after waiting for a duration corresponding to a remaining duration of the power saving state of the user equipment.
The device according to claim 25 or 26, wherein the cache device is a service chain enabling unit in a service chain corresponding to the gateway or the downlink data.