WO2017166978A1 - 一种数据传输方法及装置以及会话管理设备 - Google Patents

一种数据传输方法及装置以及会话管理设备 Download PDF

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Publication number
WO2017166978A1
WO2017166978A1 PCT/CN2017/075844 CN2017075844W WO2017166978A1 WO 2017166978 A1 WO2017166978 A1 WO 2017166978A1 CN 2017075844 W CN2017075844 W CN 2017075844W WO 2017166978 A1 WO2017166978 A1 WO 2017166978A1
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WIPO (PCT)
Prior art keywords
terminal
function entity
data transmission
gateway function
downlink data
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PCT/CN2017/075844
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English (en)
French (fr)
Inventor
王胡成
艾明
侯云静
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电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to KR1020187029847A priority Critical patent/KR102147225B1/ko
Priority to JP2018551341A priority patent/JP6730447B2/ja
Priority to US16/089,262 priority patent/US11490443B2/en
Priority to EP17773009.0A priority patent/EP3439269B1/en
Publication of WO2017166978A1 publication Critical patent/WO2017166978A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/148—Migration or transfer of sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/52—Network services specially adapted for the location of the user terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/63—Routing a service request depending on the request content or context
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a data transmission method, a data transmission device, and a session management device.
  • the serving gateway when the downlink data arrives at the serving gateway (S-GW), the serving gateway sends a downlink data notification (Downlink Data Notification) to the mobility management entity (MME), and the paging process is initiated by the mobility management entity.
  • the terminal receives the paging message sent by the mobility management entity and triggers a Service Request Procedure. After the radio bearer and the S1 bearer are established, the serving gateway sends downlink data to the terminal.
  • the specific network triggered service request process includes the steps shown in FIG. 1.
  • Step 1.1 The serving gateway receives the downlink data transmitted by the packet data gateway.
  • Step 1.2 When the terminal is not in the connected state, the serving gateway buffers the downlink data and sends a downlink data notification to the mobile management entity of the terminal.
  • Step 1.3 After receiving the downlink data notification, the mobility management entity sends a downlink data notification response to the serving gateway.
  • Step 1.4 The mobility management entity initiates a paging message to all base stations in the TA (Tracking Area) registered by the terminal.
  • Step 1.5 The base station forwards the received paging message sent by the mobility management entity to the terminal.
  • Step 1.6 After receiving the paging message, the terminal triggers the service request process.
  • Step 1.7 The service request process is performed, an S1-U bearer is established, and the serving gateway starts to transmit downlink data to the terminal.
  • next generation of mobile communication networks it is necessary to support more abundant network applications and adapt to various scenarios.
  • the network functions in each network segment are a combination of specific logical network functions for specific business needs. As shown in FIG.
  • the 3GPP carrier network is divided into three network fragments, namely, a critical machine type communication network slice (Critical MTC Slice), a large-scale machine type communication network slice (Massive MTC Slices), and a mobile broadband network.
  • MBB Slice each fragment corresponds to its own user service, and realizes data communication with the user through a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the state maintenance of the terminal is completed independently.
  • the network does not need to maintain and update the control plane context information of the terminal and the transmission path of the user plane to provide utilization of network resources.
  • this technology has the problem that the transmission path in the core network cannot be dynamically updated, which will result in the downlink data not being transmitted to the correct gateway connected to the base station currently serving.
  • the network slice When the terminal accesses multiple network slices at the same time, if there is data transmission in a certain network slice, the network slice needs to maintain the control plane context information and the user plane transmission path of the terminal. However, for other network slices without data transmission accessed by the terminal, it is not necessary to maintain and update the control plane context information of the terminal and the transmission path of the user plane, so as to improve the utilization of network resources. If it is defined that the control plane context information of the terminal and the network slice of the transmission path of the user plane need to be maintained and updated as idle slices, the idle slices can be classified into the following two types.
  • the terminal enters an idle state, and all slices are idle slices;
  • the terminal accesses multiple network slices, but the terminal enters the transmission link between the recovery core network and the access network (similar to the S1 connection) in one of the network slices, and performs data transmission, but at the terminal. If the transmission link between the core network and the access network is not restored in the other network segments that are accessed, the other network segments accessed by the terminal are idle slices.
  • the serving gateway in the slice (the service gateway is defined as the edge gateway connected to the base station in the core network) does not update with the change of the base station accessed by the terminal, so when these network segments are received, After the downlink data to the terminal, the downlink data may be cached to the wrong service gateway, resulting in the data not being transmitted correctly.
  • the technical problem to be solved by the present disclosure is to provide a data transmission method, a data transmission device, and a session management device, to solve the problem that when the network slice in the idle network slice does not maintain the user plane transmission path for the terminal, when the network slice receives the downlink data of the terminal, After that, the downlink data may be cached to the wrong gateway function entity, resulting in the problem that the data cannot be transmitted correctly.
  • the embodiment of the present disclosure provides a data transmission method, where the data transmission method includes: acquiring state information of a terminal to receive downlink data; and selecting, according to the state information, the current downlink for the terminal. a first gateway function entity for transmitting the data; determining a first data transmission path between the first gateway function entity and the second gateway function entity; and performing the current downlink data according to the first data transmission path transmission.
  • the acquiring the status information of the terminal to receive the downlink data includes: receiving a downlink data notification message sent by the second gateway function entity; and sending, according to the downlink data notification message, the status of acquiring the terminal to the function entity that manages the terminal status The request information of the information; and the status information of the terminal fed back by the functional entity receiving the status of the management terminal according to the request information.
  • the acquiring the status information of the terminal that is to receive the downlink data includes: receiving a downlink data notification message that is sent by the third gateway function entity that is currently connected to the second gateway function entity; and, according to the downlink data notification message, to the management terminal
  • the function entity of the state sends request information for acquiring state information of the terminal; and state information of the terminal fed back by the function entity receiving the state of the management terminal according to the request information.
  • the first gateway function entity for selecting, by the terminal, the current downlink data transmission, according to the status information includes: if the terminal is in an idle state, according to the location area information when the terminal last updated the location Selecting a first gateway function entity for performing transmission of current downlink data; or if the terminal is in a connected state, selecting a first gateway for performing current downlink data transmission according to information of a base station currently serving the terminal Functional entity.
  • determining the first data transmission path between the first gateway function entity and the second gateway function entity includes: when a third gateway function entity currently connected to the second gateway function entity and the first gateway When the functional entities are different, the first data transmission path between the first gateway function entity and the second gateway function entity is established.
  • performing, according to the first data transmission path, the transmitting of the current downlink data includes: establishing, according to the first data transmission path, a first between a base station currently serving the terminal and the first gateway function entity a second data transmission path; and transmitting, by the second data transmission path, downlink data buffered in the first gateway function entity to the terminal.
  • establishing a second data transmission path between the base station currently serving the terminal and the first gateway function entity includes: when the terminal is in an idle state, being in an idle state The terminal sends a paging message; receives a terminal service request sent by the terminal according to the paging message; and sends a request for establishing an air interface bearer to the base station currently serving the terminal according to the terminal service request; After the establishment of the air interface bearer of the terminal and the base station, establishing the second data transmission path between the base station and the first gateway function entity.
  • establishing a second data transmission path between the base station currently serving the terminal and the first gateway function entity includes: when the terminal is in a connected state, to the current And transmitting, by the base station serving the terminal, a request for establishing an air interface bearer; and after the air interface bearer establishment of the terminal and the base station is completed, establishing a second data transmission path between the base station and the first gateway function entity.
  • the downlink data buffered in the first gateway function entity is: downlink data sent by the second gateway function entity to the first gateway function entity; or currently connected to the second gateway function entity
  • the third gateway function entity forwards the downlink data to the first gateway function entity by using a forwarding path.
  • An embodiment of the present disclosure further provides a data transmission apparatus, where the data transmission apparatus includes: an acquisition module, configured to acquire status information of a terminal to receive downlink data; and a selection module, configured to use, according to the status information, the terminal Selecting a first gateway function entity for performing transmission of current downlink data; determining a module, configured to determine a first data transmission path between the first gateway function entity and a second gateway function entity; and a transmission module, configured to: According to the first data transmission path, The current downlink data transmission.
  • the data transmission apparatus includes: an acquisition module, configured to acquire status information of a terminal to receive downlink data; and a selection module, configured to use, according to the status information, the terminal Selecting a first gateway function entity for performing transmission of current downlink data; determining a module, configured to determine a first data transmission path between the first gateway function entity and a second gateway function entity; and a transmission module, configured to: According to the first data transmission path, The current downlink data transmission.
  • the acquiring module includes: a first receiving submodule, configured to receive a downlink data notification message sent by the second gateway function entity, where the first sending submodule is configured to report the status to the management terminal according to the downlink data notification message
  • the function entity sends request information for acquiring the status information of the terminal
  • the second receiving submodule is configured to receive status information of the terminal that is fed back by the function entity of the management terminal status according to the request information.
  • the acquiring module includes: a third receiving submodule, configured to receive a downlink data notification message sent by a third gateway function entity that is currently connected to the second gateway function entity; and a second sending submodule, configured to And a downlink data notification message, which is sent to the function entity that manages the state of the terminal, to obtain the request information of the state information of the terminal; and a fourth receiving submodule, where the functional entity that receives the state of the management terminal feeds back the terminal according to the request information Status information.
  • the selecting module is specifically configured to: if the terminal is in an idle state, select a first gateway function entity that performs current downlink data transmission according to location area information when the terminal last updated the location; or if the terminal is in the idle state
  • the connection state selects a first gateway function entity that performs current downlink data transmission according to the base station information currently serving the terminal.
  • the determining module is specifically configured to: when the third gateway function entity currently connected to the second gateway function entity is different from the first gateway function entity, establish the first gateway function entity and the A first data transmission path between the second gateway functional entities.
  • the transmission module includes: a setup submodule, configured to establish, according to the first data transmission path, a second data transmission path between a base station currently serving the terminal and the first gateway function entity; and transmit And a submodule, configured to transmit, by using the second data transmission path, downlink data buffered in the first gateway function entity to the terminal.
  • the establishing submodule includes: a paging unit, configured to: when the terminal is in an idle state, send a paging message to the terminal in an idle state; and the first receiving unit is configured to receive the a terminal service request sent by the terminal according to the paging message; the first sending unit is configured to send, according to the terminal service request, a request for establishing an air interface bearer to a base station currently serving the terminal; and a first establishing unit, After the establishment of the air interface bearer of the terminal and the base station is completed, establishing a second data transmission path between the base station and the first gateway function entity.
  • a paging unit configured to: when the terminal is in an idle state, send a paging message to the terminal in an idle state
  • the first receiving unit is configured to receive the a terminal service request sent by the terminal according to the paging message
  • the first sending unit is configured to send, according to the terminal service request, a request for establishing an air interface bearer to a base station currently serving the terminal
  • the establishing submodule includes: a second sending unit, configured to be at the terminal a connection request, a request for establishing an air interface bearer is sent to a base station currently serving the terminal; and a second establishing unit, configured to establish, after the air interface bearer establishment of the terminal and the base station is completed, the base station and the A second data transmission path between the first gateway functional entities.
  • the downlink data buffered in the first gateway function entity is: downlink data sent by the second gateway function entity to the first gateway function entity; or currently connected to the second gateway function entity
  • the third gateway function entity forwards the downlink data to the first gateway function entity by using a forwarding path.
  • Embodiments of the present disclosure also provide a data transmission device.
  • the data transmission device includes a processor, a memory coupled to the processor via a bus interface, and for storing computer instructions and data used by the processor in performing operations, wherein the computer instructions are The above method is implemented when the processor is executed.
  • the embodiment of the present disclosure further provides a session management device, including the above data transmission device.
  • the beneficial effects of the present disclosure are as follows: when the idle network slice performs downlink data transmission, firstly, according to the state information of the terminal, the gateway function entity that directly transmits the downlink data in the network slice is selected, so that the downlink data is received first.
  • the gateway function entity can send the downlink data to the correct gateway function entity that directly transmits the downlink data, thereby avoiding the problem that the downlink data cannot be transmitted to the corresponding terminal because the downlink data is sent to the wrong gateway function entity.
  • the data transmission mode adopted by the disclosure ensures the correct transmission of data and improves the reliability of communication.
  • Figure 1 shows a flow chart of a network triggered service request
  • FIG. 2 is a schematic diagram showing different network fragments provided for different services
  • FIG. 3 is a flow chart showing a data transmission method of an embodiment of the present disclosure
  • 4A is another flow chart showing a data transmission method of an embodiment of the present disclosure.
  • 4B is a detailed flowchart showing some steps in the data transmission method of the embodiment of the present disclosure.
  • 4C is a detailed flowchart showing sub-steps of a step in the data transmission method of the embodiment of the present disclosure
  • FIG. 5 is a flowchart showing a data transmission method when a terminal is in an idle state according to an embodiment of the present disclosure
  • FIG. 6 is a flowchart showing a data transmission method when a terminal is in a connected state according to an embodiment of the present disclosure
  • FIG. 7 is a flowchart showing a data transmission method according to an embodiment of the present disclosure.
  • FIG. 8 is a detailed flowchart showing a data transmission method according to an embodiment of the present disclosure.
  • FIG. 9A is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 9B is a schematic diagram showing the detailed structure of an acquisition module of the data transmission device shown in FIG. 9A;
  • FIG. 9C is a schematic diagram showing the detailed structure of a transmission module of the data transmission device shown in FIG. 9A;
  • 9D is a detailed structural diagram showing a sub-module of a transmission module of the data transmission device shown in FIG. 9A;
  • FIG. 10 is a block diagram showing another structure of a data transmission device according to an embodiment of the present disclosure.
  • FIG. 11 is a block diagram showing the structure of a session management device according to an embodiment of the present disclosure.
  • the present disclosure provides a data transmission method, a data transmission device, and a session management device.
  • the data transmission method provided by the embodiment of the present disclosure includes steps 31 to 34.
  • Step 31 Obtain status information of the terminal to receive downlink data.
  • Step 32 Select, according to the status information, a first gateway function entity for performing transmission of current downlink data for the terminal.
  • Step 33 Determine a first data transmission path between the first gateway function entity and the second gateway function entity.
  • Step 34 Perform current downlink data transmission according to the first data transmission path.
  • the data transmission method is applied to the idle network slice
  • the first gateway function entity in this embodiment refers to the first service gateway in the network slice, that is, the new service gateway selected for downlink data transmission.
  • the second gateway functional entity refers to a serving gateway within the network slice.
  • the data transmission method is applied to a data transmission device.
  • the device for data transmission may be included in a session management function entity.
  • the data transmission method of the embodiment of the present disclosure includes steps 41 to 46.
  • Step 41 Receive a downlink data notification message sent by the second gateway function entity.
  • the second gateway function entity in this embodiment refers to the data gateway, because the network side needs to send the downlink data to the data gateway first when performing downlink data transmission.
  • the data gateway when the data gateway receives the downlink data, it does not know whether the service gateway connected to it is the service gateway that correctly transmits the downlink data to the terminal. Therefore, after receiving the downlink data, the data gateway needs to perform the service gateway first. The selection needs to send a downlink data notification message to the session management function entity, so that the session management function entity determines the service gateway that correctly receives the downlink data.
  • Step 42 Send, according to the downlink data notification message, request information for the terminal status information to the functional entity that manages the terminal status.
  • Step 43 Receive terminal status information fed back by the function entity that manages the terminal status according to the request information.
  • the function entity managing the terminal status When the function entity managing the terminal status receives the request information for the terminal status information, the corresponding terminal status information is found in the terminal status context recorded by itself, and the information is fed back to the session management function entity.
  • Step 44 Select, according to the status information, a first gateway function entity for performing current downlink data transmission for the terminal.
  • first gateway function entity in this embodiment refers to the first service gateway.
  • Step 45 Determine a first data transmission path between the first gateway function entity and the second gateway function entity.
  • Step 46 Perform current downlink data transmission according to the first data transmission path.
  • steps 44 through 46 will be described in detail below with reference to FIGS. 4B and 4C.
  • Step 44 includes, in a specific implementation, step 441, that is, if the terminal is in an idle state, selecting the first transmission of the current downlink data according to the location area information when the terminal last updated the location. Gateway functional entity.
  • the terminal when the terminal is in an idle state, it indicates that the terminal is not currently connected to the base station. At this time, the information of the base station cannot be acquired, and the location area information of the last update of the terminal needs to be obtained in the tracking area (TA) information. This location area information is determined as the base station of the terminal service, and then the selection of the serving gateway is performed.
  • TA tracking area
  • the step 44 includes a step 442 in the specific implementation, that is, if the terminal is in the connected state, the first gateway function entity for performing the transmission of the current downlink data is selected according to the base station information currently serving the terminal.
  • the terminal when the terminal is in the connected state, it indicates that the terminal is connected to the base station, and the session management function entity only needs to obtain the base station information currently serving the terminal, and then the service gateway can be selected.
  • step 45 includes steps 451 and 452.
  • Step 451 Establish a first data transmission path between the first gateway function entity and the second gateway function entity when the third gateway function entity currently connected to the second gateway function entity is different from the first gateway function entity.
  • Step 452 When the third gateway function entity currently connected to the second gateway function entity is the same as the first gateway function entity, the session management function entity notifies the second gateway function entity to perform downlink data transmission according to the original data transmission path.
  • Step 46 includes steps 461 and 462 in a specific implementation.
  • Step 461 Establish a second data transmission path between the base station currently serving the terminal and the first gateway function entity according to the first data transmission path.
  • Step 461 is implemented to establish a transmission path between the newly determined serving gateway in the network slice and the base station serving the terminal, so as to ensure that the network slice is in a connected state with the base station.
  • Step 462 The downlink data buffered in the first gateway function entity is transmitted to the terminal by using the second data transmission path.
  • the service gateway can be slowed down.
  • the stored downlink data is transmitted to the base station, and then the downlink data is sent to the corresponding terminal via the base station.
  • the downlink data buffered in the first gateway function entity is downlink data sent by the second gateway function entity to the first gateway function entity.
  • step 461 includes steps 4611 to 4614 when implemented.
  • Step 4611 When the terminal is in an idle state, the paging message is sent to the terminal in the idle state.
  • Step 4612 Receive a terminal service request sent by the terminal according to the paging message.
  • Step 4613 Send a request for establishing an air interface bearer to the base station currently serving the terminal according to the terminal service request.
  • Step 4414 After the establishment of the air interface bearer of the terminal and the base station is completed, establishing a second data transmission path between the base station and the first gateway function entity.
  • step 461 includes steps 4615 through 4616 when implemented.
  • Step 4615 When the terminal is in the connected state, send a request for establishing an air interface bearer to the base station currently serving the terminal.
  • Step 4616 After the establishment of the air interface bearer of the terminal and the base station is completed, establishing a second data transmission path between the base station and the first gateway function entity.
  • the specific implementation process of the data transmission method of the embodiment of the present disclosure includes steps 5.1 to 5.16.
  • Step 5.1 When receiving the downlink data, the data gateway in the idle network slice first buffers the downlink data, and then sends a downlink data notification message to the session management function entity.
  • Step 5.2 When receiving the downlink data notification message, the session management function entity sends the request information to the terminal state information management function entity (ie, the function entity of the management terminal state described above) to obtain the state information of the terminal.
  • the terminal state information management function entity ie, the function entity of the management terminal state described above
  • Step 5.3 The terminal status information management function entity feeds back the status information of the terminal to the session management function entity according to the request information.
  • the status information of the terminal includes: the terminal is in an idle state and the latest location information of the terminal is the location of the last location update of the terminal. District information.
  • Step 5.4 After receiving the status information of the terminal, the session management function entity selects an appropriate service gateway for the terminal according to the status information.
  • Step 5.5 If the new service gateway is different from the original service gateway, the session management function entity establishes a transmission path between the selected service gateway and the data gateway, that is, updates the transmission path; otherwise, the session management function entity notifies the data gateway to press The original transmission path carries out downlink data transmission.
  • Step 5.6 The data gateway sends the downlink data to the serving gateway according to the new transmission path or according to the original transmission path.
  • Step 5.7 The serving gateway performs buffering of downlink data.
  • Step 5.8 The session management function entity sends a paging message to the base station.
  • Step 5.9 The base station forwards the paging message to the terminal.
  • Step 5.10 The terminal initiates a service request to the session management function entity.
  • Step 5.11 The session management function entity sends a request to establish a bearer bearer to the base station.
  • Step 5.12 The base station establishes an air interface bearer with the terminal.
  • Step 5.13 Establish a transmission path between the base station and the serving gateway.
  • Step 5.14 The serving gateway performs downlink data transmission according to the transmission path between the base station and the base station.
  • Step 5.15 The base station sends the received downlink data to the terminal.
  • Step 5.16 The session management function entity sends the status information of the terminal after the service gateway is selected to the terminal status information management function entity, so that the terminal status information management function entity updates the status information of the corresponding terminal.
  • the specific implementation process of the data transmission method of the embodiment of the present disclosure includes steps 6.1 to 6.13.
  • Step 6.1 When receiving the downlink data, the data gateway in the idle network slice first buffers the downlink data, and then sends a downlink data notification message to the session management function entity.
  • Step 6.2 When receiving the downlink data notification message, the session management function entity sends the request information to the terminal state information management function entity to obtain the state information of the terminal.
  • Step 6.3 The terminal status information management function entity sends the session management function entity according to the request information.
  • the status information of the terminal is feedback; wherein the status information of the terminal includes: the status of the terminal being connected and the latest location information of the terminal being information of the base station currently serving the terminal, such as identification information of the base station.
  • Step 6.4 After receiving the status information of the terminal, the session management function entity selects an appropriate service gateway for the terminal according to the status information.
  • Step 6.5 If the new service gateway is different from the original service gateway, the session management function entity establishes a transmission path between the selected service gateway and the data gateway, that is, updates the transmission path; otherwise, the session management function entity notifies the data gateway according to the original
  • the transmission path carries out downlink data transmission.
  • Step 6.6 The data gateway sends the downlink data to the serving gateway according to the new transmission path or according to the original transmission path.
  • Step 6.7 The serving gateway performs buffering of downlink data.
  • Step 6.8 The session management function entity sends a request for establishing an air interface bearer to the base station.
  • Step 6.9 The base station establishes an air interface bearer with the terminal.
  • Step 6.10 Establish a transmission path between the base station and the serving gateway.
  • step 6.8 to step 6.10 another implementation manner of step 6.8 to step 6.10 is: the session management function entity sends a message to the terminal, and triggers the terminal to initiate a service request process.
  • Step 6.11 The serving gateway performs downlink data transmission according to a transmission path between the base station and the base station.
  • Step 6.12 The base station sends the received downlink data to the terminal.
  • Step 6.13 The session management function entity sends the status information of the terminal after the service gateway is selected to the terminal status information management function entity, so that the terminal status information management function entity updates the status information of the corresponding terminal.
  • the data gateway in the idle network slice when receiving the downlink data, the data gateway in the idle network slice first buffers the downlink data, and then triggers the selection of the serving gateway. Only after determining the service gateway that needs to be transmitted, the data gateway sends the downlink data to the corresponding service gateway, and then the selected current serving gateway performs buffering of the downlink data, thereby reducing the downlink data transmission in the network slice and reducing Resource consumption within the network slice.
  • the method of the embodiment ensures accurate transmission of downlink data and improves reliability of communication.
  • another example of the data transmission method of the embodiment of the present disclosure includes steps 71 to 76.
  • Step 71 Receive a downlink data notification message sent by a third gateway function entity that is currently connected to the second gateway function entity.
  • the second gateway function entity refers to a data gateway
  • the third gateway function entity refers to an original service gateway connected to the data gateway.
  • Step 72 Send, according to the downlink data notification message, request information for acquiring state information of the terminal to the function entity that manages the state of the terminal.
  • Step 73 Receive status information of the terminal that is fed back by the function entity that manages the state of the terminal according to the request information.
  • Step 74 Select, according to the status information, a first gateway function entity for performing transmission of current downlink data for the terminal.
  • Step 75 Determine a first data transmission path between the first gateway function entity and the second gateway function entity.
  • Step 76 Perform current downlink data transmission according to the first data transmission path.
  • the data transmission method is applied to a data transmission device.
  • the data transmission device can be included in a session management function entity.
  • the downlink data notification message is triggered primarily by the original serving gateway connected to the data gateway.
  • the downlink data is sent to the original serving gateway first, and then the downlink data notification message is triggered by the original serving gateway, so that the session management function entity selects the service gateway, thereby ensuring Accurate transmission of downstream data.
  • step 74, step 75, and step 76 in this embodiment may be implemented in the same manner as step 44, step 45, and step 46, respectively, and details are not described herein.
  • the specific implementation process of the data transmission method of the present disclosure in practical applications includes steps 8.1 to 8.14.
  • Step 8.1 The data gateway in the idle network slice sends the received downlink data to the original serving gateway connected thereto, and the original serving gateway caches the downlink data.
  • Step 8.2 The original serving gateway sends a downlink data notification message to the session management function entity.
  • Step 8.3 When receiving the downlink data notification message, the session management function entity sends the request information to the terminal state information management function entity to obtain the state information of the terminal.
  • Step 8.4 The terminal status information management function entity implements the session management function according to the request information.
  • the status information of the terminal feedback terminal wherein the status information of the terminal includes: the terminal is in an idle state or a connected state and the latest location information of the terminal; when the terminal is in an idle state, the latest location information is the location of the terminal when the location is last updated. Zone information; when the terminal is in the connected state, its latest location information is the information of the base station currently serving the terminal.
  • Step 8.5 After receiving the status information of the terminal, the session management function entity selects an appropriate service gateway for the terminal according to the status information.
  • Step 8.6 If the new service gateway is different from the original service gateway, the session management function entity establishes a transmission path between the selected service gateway and the data gateway, that is, updates the transmission path; otherwise, the session management function entity notifies the data gateway according to the original The transmission path carries out downlink data transmission.
  • Step 8.7 The data gateway sends the downlink data to the new serving gateway according to the new transmission path.
  • Step 8.8 Establish a forwarding path from the original serving gateway to the new serving gateway.
  • Step 8.9 The original serving gateway sends the buffered data to the new serving gateway.
  • Step 8.10 The new service gateway performs buffering of downlink data.
  • Step 8.11 Establish a data transmission path between the network slice and the access network side.
  • step 8.11 mainly implements the session management function entity to page the idle state terminal to establish the air interface bearer, and establish a transmission path between the base station and the new service gateway.
  • the session management function entity to page the idle state terminal to establish the air interface bearer, and establish a transmission path between the base station and the new service gateway.
  • Step 8.12 The new serving gateway performs downlink data transmission according to the data transmission path between the base station and the base station. It should be noted that the downlink data includes downlink data sent by the data gateway received by the new serving gateway and downlink data forwarded by the original serving gateway to the new serving gateway.
  • Step 8.13 The base station sends the received downlink data to the terminal.
  • Step 8.14 The session management function entity sends the status information of the terminal after the service gateway is selected to the terminal status information management function entity, so that the terminal status information management function entity updates the status information of the corresponding terminal.
  • the data gateway in the idle network slice after receiving the downlink data, the data gateway in the idle network slice first sends downlink data to the original serving gateway according to the previously established path, and the original serving gateway buffers the downlink data, and then triggers the new service.
  • the choice of gateway When determining a new serving gateway that receives downlink data, establishing a transmission path between the data gateway and the new serving gateway, and a forwarding path between the original serving gateway and the new serving gateway, and then performing downlink data by the selected new serving gateway. Cache, It ensures the accurate transmission of downlink data and improves the reliability of network communication.
  • an embodiment of the present disclosure provides a data transmission device 90.
  • the data transmission device 90 includes: an obtaining module 91, configured to acquire state information of a terminal that is to receive downlink data, and a selecting module 92, configured to select, by the state information, a first gateway function for performing current downlink data transmission according to the state information.
  • the determining module 93 is configured to determine a first data transmission path between the first gateway function entity and the second gateway function entity, and the transmitting module 94 is configured to perform current downlink data transmission according to the first data transmission path.
  • the obtaining module 91 includes: a first receiving submodule 911, configured to receive a downlink data notification message sent by the second gateway function entity, where the first sending submodule 912 is configured to notify the state of the management terminal according to the downlink data notification message.
  • the function entity sends request information for acquiring the state information of the terminal; and the second receiving sub-module 913 is configured to receive state information of the terminal that is fed back by the function entity that manages the state of the terminal according to the request information.
  • the obtaining module 91 includes: a third receiving submodule 914, configured to receive a downlink data notification message sent by a third gateway function entity that is currently connected to the second gateway function entity; and a second sending submodule 915, configured to The downlink data notification message is sent to the function entity that manages the state of the terminal to obtain the request information of the state information of the terminal; and the fourth receiving sub-module 916 is configured to receive the state information of the terminal that is fed back by the function entity that manages the state of the terminal according to the request information.
  • the selecting module 92 is specifically configured to: if the terminal is in an idle state, select a first gateway function entity for performing current downlink data transmission according to the location area information when the terminal last updated the location; or if the terminal is in the connection The state selects a first gateway function entity for performing transmission of current downlink data according to the base station information currently serving the terminal.
  • the determining module 93 is specifically configured to: when the third gateway function entity currently connected to the second gateway function entity is different from the first gateway function entity, establish a first between the first gateway function entity and the second gateway function entity A data transmission path.
  • the transmission module 94 includes: a establishing submodule 941, configured to establish, according to the first data transmission path, a second data transmission path between the base station currently serving the terminal and the first gateway function entity; and the transmission submodule 942, And transmitting, by using the second data transmission path, downlink data buffered in the first gateway function entity to the terminal.
  • a establishing submodule 941 configured to establish, according to the first data transmission path, a second data transmission path between the base station currently serving the terminal and the first gateway function entity
  • the transmission submodule 942 And transmitting, by using the second data transmission path, downlink data buffered in the first gateway function entity to the terminal.
  • the establishing submodule 941 includes: a paging unit 9411, configured to be in the idle state of the terminal And sending a paging message to the terminal in the idle state; the first receiving unit 9412 is configured to receive the terminal service request sent by the terminal according to the paging message; the first sending unit 9413 is configured to send the current request according to the terminal service request Sending a request for establishing an air interface bearer to the base station serving the terminal; and a first establishing unit 9414, configured to establish a second data transmission path between the base station and the first gateway function entity after the air interface bearer establishment of the terminal and the base station is completed.
  • the establishing submodule 941 includes: a second sending unit 9415, configured to send an establishment air interface bearer request to a base station currently serving the terminal when the terminal is in a connected state; and a second establishing unit 9416, configured to After the establishment of the air interface bearer of the terminal and the base station is completed, a second data transmission path between the base station and the first gateway function entity is established.
  • the downlink data buffered in the first gateway function entity is downlink data sent by the data gateway to the first gateway function entity, or the third gateway function entity currently connected to the second gateway function entity passes the forwarding path. Downstream data forwarded to the first gateway functional entity.
  • the embodiment of the device is a device corresponding to the method embodiment, and all the implementation manners in the foregoing method embodiments are applicable to the embodiment of the device, and the same technical effects can be achieved.
  • this embodiment provides a data transmission device 1010.
  • the data transmission device 1010 includes a processor 1011 and a memory 1013 coupled to the processor 1011 via a bus interface 1012.
  • the memory 1013 is used to store computer instructions and data used by the processor 1011 in performing operations.
  • the processor 1011 calls and executes the computer instructions and data stored in the memory 1013, the following functional modules are implemented: the acquiring module acquires the state information of the terminal to receive the downlink data; the selecting module, and selecting the module according to the state information a first gateway function entity of the current downlink data transmission; a determining module, determining a first data transmission path between the first gateway function entity and the second gateway function entity; and a transmission module, performing current downlink data according to the first data transmission path Transmission.
  • the processor 1011 also implements the functions of any of the other modules of the above apparatus. It should be noted that the device may be part of a session management function entity.
  • the processor 1011 invokes and executes computer instructions and data stored in the memory 1013, the processor 1011 can implement the data transfer method described in the embodiments of FIGS. 3 through 8 of the present disclosure.
  • the computer program includes instructions for performing some or all of the steps of the above methods, and the computer program can be stored in a computer readable storage medium, which can be any form of storage medium.
  • Embodiments of the present disclosure also provide a session management device 1110.
  • the session management device 1110 includes a data transmission device 1111.
  • the data transmission device 1111 may be the data transmission device described in the above embodiment, such as the data transmission device 90 shown in FIG. 9A or the data transmission device 1010 shown in FIG. 10, and the data transmission device 1111 may include the above implementation.
  • the sub-modules or units of the data transmission device described by way of example may implement the functions of the data transmission device described above.
  • the session management device can implement connection with the data gateway, the service gateway, and the base station during data communication, thereby ensuring accurate transmission of data in the network.

Abstract

本公开提供了一种数据传输方法、数据传输装置及会话管理设备，该数据传输方法包括：获取待接收下行数据的终端的状态信息；根据状态信息，为终端选择用于进行当前下行数据的传输的第一网关功能实体；确定第一网关功能实体与第二网关功能实体之间的第一数据传输路径；根据第一数据传输路径，进行当前下行数据的传输。

Description

一种数据传输方法及装置以及会话管理设备
相关申请的交叉引用
本申请主张在2016年3月28日在中国提交的中国专利申请号No.201610183650.3的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，特别涉及一种数据传输方法、数据传输装置以及会话管理设备。
背景技术
相关的LTE系统中，当下行数据到达服务网关(S-GW)时，服务网关向移动管理实体(MME)发送下行数据通知(Downlink Data Notification)，由移动管理实体发起寻呼过程。终端(UE)接收到由移动管理实体发送的寻呼消息并触发服务请求过程(Service Request Procedure)。在建立了无线承载和S1承载后，服务网关向终端发送下行数据。具体的网络触发的服务请求流程包括如图1所示的步骤。
步骤1.1：服务网关接收由分组数据网关传送的下行数据。
步骤1.2：当终端不处于连接状态时，服务网关缓存下行数据，并向终端的移动管理实体发送下行数据通知。
步骤1.3：移动管理实体在收到下行数据通知后，向服务网关发送下行数据通知响应。
步骤1.4：移动管理实体向终端注册的TA(跟踪区)中的所有基站发起寻呼消息。
步骤1.5：基站将接收到的由移动管理实体发送的寻呼消息转发给终端。
步骤1.6：终端在接收到该寻呼消息后，触发服务请求过程。
步骤1.7：服务请求流程进行，建立S1-U承载，服务网关开始向终端传输下行数据。
在下一代移动通信网络中需要支持更加丰富的网络应用，适应各种场景 的业务需求，满足不同用户的服务性能要求，支持各种类型的设备接入，多样化的业务需求对网络的移动性管理、带宽需求、服务质量以及安全、计费等各方面都提出了不同的需求。运营商为支持多样化的业务需求、同时为了降低网络建设和运营的成本、提高网络管理的灵活性和网络资源有效性，在下一代移动通信中提出利用一个“网络分片(或网络切片)”来支持特定类型的通信业务，每个网络分片中的网络功能是针对特定业务需求的特定逻辑网络功能的组合。如图2所示，将3GPP运营商网络划分为3个网络分片，即关键机器类通信网络切片(Critical MTC Slice)、大规模机器类通信网分片(Massive MTC Slices)和移动宽带网络分片(MBB Slice)，每个分片对应各自的用户业务，并通过无线接入网(RAN)实现与用户的数据通信。还需要说明的是，为了使一个终端用户同时获取多个业务，允许用户的不同业务分别接入到各自不同的网络分片中。
在部署了独立于各网络切片的终端状态管理功能后，终端的状态维护独立完成。通常，对于终端接入的网络切片，如果网络切片内无数据传输，网络无需维护和更新该终端的控制平面上下文信息和用户面的传输路径，以提供网络资源的利用率。但是，该技术存在在核心网内的传输路径无法动态更新的问题，这将导致下行数据无法传输到正确的与当前服务中的基站相连的网关。
在终端同时接入多个网络切片时，如果某个网络切片内有数据传输，则该网络切片需要维护该终端的控制平面上下文信息和用户面传输路径。但对于终端接入的其他无数据传输的网络切片，则无需维护和更新该终端的控制平面上下文信息和用户面的传输路径，以提高网络资源的利用率。若定义无需维护和更新该终端的控制平面上下文信息和用户面的传输路径的网络切片为空闲切片，则空闲切片可分为以下两种。
1、终端进入空闲状态，所有切片为空闲切片；以及
2、终端接入了多个网络切片，但终端只在其中一个网络切片内进入了恢复核心网和接入网之间的传输链路(类似S1连接)，并进行了数据传输，而在终端所接入的其它网络切片内没有恢复核心网和接入网之间的传输链路，则终端所接入的其它网络切片为空闲切片。
由于空闲切片没有为终端维护用户面传输路径，切片内的服务网关(服务网关定义为核心网内与基站相连的边缘网关)没有随终端接入的基站变化而发生更新，因此当这些网络切片收到该终端的下行数据后，可能会将下行数据缓存到错误的服务网关，导致数据不能正确传输。
发明内容
本公开要解决的技术问题是提供一种数据传输方法、数据传输装置及会话管理设备，以解决因空闲的网络切片内没有为终端维护用户面传输路径而当这些网络切片收到终端的下行数据后，可能会将下行数据缓存到错误的网关功能实体，导致数据不能正确传输的问题。
为了解决上述技术问题，本公开实施例提供一种数据传输方法，该数据传输方法包括：获取待接收下行数据的终端的状态信息；根据所述状态信息，为所述终端选择用于进行当前下行数据的传输的第一网关功能实体；确定所述第一网关功能实体与第二网关功能实体之间的第一数据传输路径；以及根据所述第一数据传输路径，进行所述当前下行数据的传输。
进一步，获取待接收下行数据的终端的状态信息包括：接收由所述第二网关功能实体发送的下行数据通知消息；根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
进一步地，获取待接收下行数据的终端的状态信息包括：接收当前与所述第二网关功能实体连接的第三网关功能实体发送的下行数据通知消息；根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
进一步地，根据所述状态信息，为所述终端选择用于进行当前下行数据的传输的第一网关功能实体包括：若所述终端处于空闲状态，则根据终端最近一次位置更新时的位置区信息，选择用于进行当前下行数据的传输的第一网关功能实体；或者若所述终端处于连接状态，则根据当前为终端服务的基站的信息，选择用于进行当前下行数据的传输的第一网关功能实体。
进一步地，确定所述第一网关功能实体与第二网关功能实体之间的第一数据传输路径包括：当与所述第二网关功能实体当前连接的第三网关功能实体与所述第一网关功能实体不同时，建立所述第一网关功能实体与所述第二网关功能实体之间的所述第一数据传输路径。
进一步地，根据所述第一数据传输路径，进行所述当前下行数据的传输包括：根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径；以及通过所述第二数据传输路径，将缓存在所述第一网关功能实体中的下行数据传输给所述终端。
进一步地，根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径包括：在所述终端处于空闲状态时，向处于空闲状态的所述终端下发寻呼消息；接收所述终端根据所述寻呼消息发送的终端服务请求；根据所述终端服务请求，向所述当前为终端服务的基站发送建立空口承载的请求；以及在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的所述第二数据传输路径。
进一步地，根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径包括：在所述终端处于连接状态时，向所述当前为终端服务的基站发送建立空口承载的请求；以及在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的第二数据传输路径。
进一步地，缓存在所述第一网关功能实体中的下行数据是：所述第二网关功能实体发送给所述第一网关功能实体的下行数据；或与所述第二网关功能实体当前连接的第三网关功能实体通过转发路径转发给所述第一网关功能实体的下行数据。
本公开的实施例还提供一种数据传输装置，该数据传输装置包括：获取模块，用于获取待接收下行数据的终端的状态信息；选择模块，用于根据所述状态信息，为所述终端选择用于进行当前下行数据的传输的第一网关功能实体；确定模块，用于确定所述第一网关功能实体与第二网关功能实体之间的第一数据传输路径；以及传输模块，用于根据所述第一数据传输路径，进 行当前下行数据的传输。
进一步地，所述获取模块包括：第一接收子模块，用于接收第二网关功能实体发送的下行数据通知消息；第一发送子模块，用于根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及第二接收子模块，用于接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
进一步地，所述获取模块包括：第三接收子模块，用于接收当前与第二网关功能实体连接的第三网关功能实体发送的下行数据通知消息；第二发送子模块，用于根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及第四接收子模块，用于接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
进一步地，所述选择模块具体用于：若所述终端处于空闲状态，根据终端最近一次位置更新时的位置区信息，选择进行当前下行数据传输的第一网关功能实体；或者若所述终端处于连接状态，根据当前为终端服务的基站信息，选择进行当前下行数据传输的第一网关功能实体。
进一步地，所述确定模块具体用于：当与所述第二网关功能实体当前连接的第三网关功能实体与所述第一网关功能实体不同时，建立所述第一网关功能实体与所述第二网关功能实体之间的第一数据传输路径。
进一步地，所述传输模块包括：建立子模块，用于根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径；以及传输子模块，用于通过所述第二数据传输路径，将缓存在所述第一网关功能实体中的下行数据传输给所述终端。
进一步地，，所述建立子模块包括：寻呼单元，用于在所述终端处于空闲状态时，向处于空闲状态的所述终端下发寻呼消息；第一接收单元，用于接收所述终端根据所述寻呼消息发送的终端服务请求；第一发送单元，用于根据所述终端服务请求，向当前为所述终端服务的基站发送建立空口承载的请求；以及第一建立单元，用于在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的第二数据传输路径。
进一步地，所述建立子模块包括：第二发送单元，用于在所述终端处于 连接状态时，向当前为所述终端服务的基站发送建立空口承载的请求；以及第二建立单元，用于在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的第二数据传输路径。
进一步地，缓存在所述第一网关功能实体中的下行数据是：所述第二网关功能实体发送给所述第一网关功能实体的下行数据；或当前与所述第二网关功能实体连接的第三网关功能实体通过转发路径转发给所述第一网关功能实体的下行数据。
本公开的实施例还提供一种数据传输装置。该数据传输装置包括：处理器，存储器，通过总线接口与所述处理器连接，并且用于存储由所述处理器在执行操作时所使用的计算机指令和数据，其中所述计算机指令在由所述处理器执行时实现上述的方法。
本公开实施例还提供一种会话管理设备，包括上述的数据传输装置。
本公开的有益效果是：上述方案，在空闲的网络切片进行下行数据传输时，首先根据终端的状态信息进行网络切片内直接传输下行数据的网关功能实体的选择，使得最先接收到下行数据的网关功能实体可以将下行数据发送到正确的直接传输下行数据的网关功能实体，避免了因将下行数据发送到错误的网关功能实体，使得下行数据不能传输到相应终端的问题。本公开所采用的数据传输方式，保证了数据的正确传输，提高了通信的可靠性。
附图说明
图1表示网络触发的服务请求的流程图；
图2表示针对不同业务分别提供不同网络分片的示意图；
图3表示本公开实施例的数据传输方法的流程图；
图4A表示本公开实施例的数据传输方法的另一流程图；
图4B表示本公开实施例的数据传输方法中的一些步骤的详细流程图；
图4C表示本公开实施例的数据传输方法中的一个步骤的子步骤的详细流程图；
图5表示本公开实施例的在终端处于空闲状态时的数据传输方法的流程图；
图6表示本公开实施例的在终端处于连接状态时的数据传输方法的流程图；
图7表示本公开实施例的数据传输方法的流程图；
图8表示本公开实施例的数据传输方法的详细流程图；
图9A表示本公开实施例的数据传输装置的结构示意图；
图9B表示图9A所示的数据传输装置的获取模块的详细结构示意图；
图9C表示图9A所示的数据传输装置的传输模块的详细结构示意图；
图9D表示图9A所示的数据传输装置的传输模块的建立子模块的详细结构示意图；
图10表示本公开实施例的数据传输装置的另一结构示意图；以及
图11表示本公开实施例的会话管理设备的结构示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图及具体实施例对本公开进行详细描述。
因为空闲网络切片内没有为终端维护用户面传输路径，所以当这些网络切片收到发给终端的下行数据后，可能会将下行数据缓存到错误的网关功能实体，导致数据不能正确传输。针对该问题，本公开提供一种数据传输方法、数据传输装置以及会话管理设备。
如图3所示，本公开实施例提供的数据传输方法包括步骤31至步骤34。
步骤31：获取待接收下行数据的终端的状态信息。
步骤32：根据该状态信息，为终端选择用于进行当前下行数据的传输的第一网关功能实体。
步骤33：确定第一网关功能实体与第二网关功能实体之间的第一数据传输路径。
步骤34：根据第一数据传输路径，进行当前的下行数据传输。
需要说明的是，该数据传输方法应用于空闲的网络切片内，且本实施例中的第一网关功能实体指的是网络切片内的第一服务网关，即为下行数据传输选择的新服务网关，该第二网关功能实体指的是网络切片内的服务网关。 当需要利用空闲的网络切片进行下行数据的传输时，首先需要确定待接收该下行数据的终端，然后确定该终端的服务网关，然后利用重新选择的服务网关进行下行数据的传输，保证了下行数据的正确传输，提高了通信的可靠性。
需要说明的是，该数据传输方法应用于数据传输装置。具体地，该数据传输的装置可以包含在会话管理功能实体中。
如图4所示，本公开实施例的数据传输方法包括步骤41至步骤46。
步骤41：接收第二网关功能实体发送的下行数据通知消息。
需要说明的是，本实施例中的第二网关功能实体指的是数据网关，因为网络侧在进行下行数据的发送时，需要先将下行数据发送给数据网关。在本实施例中，因数据网关在接收到下行数据时，不知道与其连接的服务网关是否就是正确传输下行数据到终端的服务网关，因此数据网关在接收到下行数据后，需要先进行服务网关的选择，需要发送下行数据通知消息到会话管理功能实体，以使得会话管理功能实体确定正确接收该下行数据的服务网关。
步骤42：根据下行数据通知消息，向管理终端状态的功能实体发送对终端状态信息的请求信息。
步骤43：接收管理终端状态的功能实体根据该请求信息反馈的终端状态信息。
当管理终端状态的功能实体接收到对终端状态信息的请求信息时，在自身记录的终端状态上下文中找到与相应的终端状态信息，并将该信息反馈给会话管理功能实体。
步骤44：根据该状态信息，为终端选择用于进行当前下行数据传输的第一网关功能实体。
需要说明的是，本实施例中的第一网关功能实体指的是第一服务网关。
步骤45：确定第一网关功能实体与第二网关功能实体之间的第一数据传输路径。
步骤46：根据第一数据传输路径，进行当前下行数据的传输。
下面结合图4B和图4C对步骤44至步骤46的具体实现进行详细描述。
步骤44在具体实现时包括步骤441，即若终端处于空闲状态，则根据终端最近一次位置更新时的位置区信息，选择进行当前下行数据的传输的第一 网关功能实体。
需要说明的是，当终端处于空闲状态时，即表明终端当前未与基站连接，此时无法获取基站的信息，需要在跟踪区(TA)信息中获取终端最近一次更新时的位置区信息，以此位置区信息确定为终端服务的基站，然后进行服务网关的选择。
或者，步骤44在具体实现时包括步骤442，即若终端处于连接状态，则根据当前为终端服务的基站信息，选择用于进行当前下行数据的传输的第一网关功能实体。
需要说明的是，当终端处于连接状态时，表明终端已连接到基站，会话管理功能实体只需获取到当前为终端服务的基站信息，便可进行服务网关的选择。
具体地，在进行数据网关与服务网关之间的传输路径的确定时，步骤45包括步骤451和步骤452。
步骤451：当与第二网关功能实体当前连接的第三网关功能实体与第一网关功能实体不同时，建立第一网关功能实体与第二网关功能实体之间的第一数据传输路径。
步骤452：当与第二网关功能实体当前连接的第三网关功能实体与第一网关功能实体相同时，会话管理功能实体通知第二网关功能实体按照原来的数据传输路径进行下行数据的传输。
在建立了第二网关功能实体与第一网关功能实体之间的传输路径后，便进行下行数据的具体传输过程。步骤46在具体实现时包括步骤461和步骤462。
步骤461：根据第一数据传输路径，建立当前为终端服务的基站与第一网关功能实体之间的第二数据传输路径。
步骤461实现的是，建立该网络切片内新确定的服务网关与为终端服务的基站之间的传输路径，以保证该网络切片与基站处于连接状态。
步骤462：通过第二数据传输路径，将缓存在第一网关功能实体中的下行数据传输给终端。
在服务网关与基站之间的传输路径建立后，便可以实现将服务网关中缓 存的下行数据传输给基站，然后经由基站将该下行数据发送给对应的终端。
需要说明的是，本实施例中，缓存在第一网关功能实体中的下行数据是由第二网关功能实体发送给第一网关功能实体的下行数据。
如果本实施例中待接收下行数据的终端处于空闲状态，则在实现下行数据到终端的传输时，需首先建立终端与基站的连接。具体地，如图4C所示，步骤461在实现时包括步骤4611至步骤4614。
步骤4611：在终端处于空闲状态时，向处于空闲状态的终端下发寻呼消息。
步骤4612：接收终端根据寻呼消息发送的终端服务请求。
步骤4613：根据终端服务请求，向当前为终端服务的基站发送建立空口承载的请求。
步骤4614：在终端与基站的空口承载建立完成后，建立基站与第一网关功能实体之间的第二数据传输路径。
当本实施例中待接收下行数据的终端处于连接状态时，在实现下行数据到终端的传输时，只需直接建立基站与网络切片的连接即可。具体地，如图4C所示，步骤461在实现时包括步骤4615至步骤4616。
步骤4615：在终端处于连接状态时，向当前为终端服务的基站发送建立空口承载的请求。
步骤4616：在终端与基站的空口承载建立完成后，建立基站与第一网关功能实体之间的第二数据传输路径。
接下来分别对终端处于空闲状态和连接状态时本实施例的数据传输方法在实际应用中的实现流程进行说明。
如图5所示，当终端处于空闲状态时，本公开的实施例的数据传输方法具体实现流程包括步骤5.1至步骤5.16。
步骤5.1：闲置网络切片内的数据网关在接收到下行数据时，首先进行下行数据的缓存，然后向会话管理功能实体发送下行数据通知消息。
步骤5.2：会话管理功能实体在接收到下行数据通知消息时，向终端状态信息管理功能实体(即上述的管理终端状态的功能实体)发送请求信息，以获取终端的状态信息。
步骤5.3：终端状态信息管理功能实体根据请求信息向会话管理功能实体反馈终端的状态信息；其中，终端的状态信息包括：终端处于空闲状态以及终端的最新位置信息为终端最近一次位置更新时的位置区信息。
步骤5.4：会话管理功能实体在接收到终端的状态信息后，根据该状态信息为终端选择合适的服务网关。
步骤5.5：若新的服务网关与原服务网关不同，则会话管理功能实体建立所选的服务网关与数据网关之间的传输路径，即进行传输路径的更新；否则会话管理功能实体通知数据网关按原传输路径进行下行数据的传输。
步骤5.6：数据网关根据新的传输路径或根据原传输路径将下行数据发送给服务网关。
步骤5.7：服务网关进行下行数据的缓存。
步骤5.8：会话管理功能实体向基站发送寻呼消息。
步骤5.9：基站将寻呼消息转发给终端。
步骤5.10：终端向会话管理功能实体发起服务请求。
步骤5.11：会话管理功能实体向基站发送建立空口承载的请求。
步骤5.12：基站建立与终端之间的空口承载。
步骤5.13：建立基站与服务网关之间的传输路径。
步骤5.14：服务网关根据与基站间的传输路径进行下行数据的传输。
步骤5.15：基站将接收到的下行数据发送给终端。
步骤5.16：会话管理功能实体将进行服务网关选择后的终端的状态信息发送给终端状态信息管理功能实体，使得终端状态信息管理功能实体进行对应终端的状态信息的更新。
如图6所示，当终端处于连接状态时，本公开的实施例的数据传输方法具体实现流程包括步骤6.1至步骤6.13。
步骤6.1：闲置网络切片内的数据网关在接收到下行数据时，首先进行下行数据的缓存，然后向会话管理功能实体发送下行数据通知消息。
步骤6.2：会话管理功能实体在接收到下行数据通知消息时，向终端状态信息管理功能实体发送请求信息，以获取终端的状态信息。
步骤6.3：终端状态信息管理功能实体根据请求信息向会话管理功能实体 反馈终端的状态信息；其中，终端的状态信息包括：终端处于连接的状态以及终端的最新位置信息为当前为终端服务的基站的信息，例如基站的标识信息。
步骤6.4：会话管理功能实体在接收到终端的状态信息后，根据该状态信息为终端选择合适的服务网关。
步骤6.5：若新的服务网关与原服务网关不同，则会话管理功能实体建立所选服务网关与数据网关之间的传输路径，即进行传输路径的更新；否则会话管理功能实体通知数据网关按原传输路径进行下行数据的传输。
步骤6.6：数据网关根据新的传输路径或根据原传输路径将下行数据发送给服务网关。
步骤6.7：服务网关进行下行数据的缓存。
步骤6.8：会话管理功能实体向基站发送建立空口承载的请求。
步骤6.9：基站建立与终端之间的空口承载。
步骤6.10：建立基站与服务网关之间的传输路径。
需要说明的是，步骤6.8至步骤6.10的另一实现方式为：会话管理功能实体向终端发送消息，触发终端发起服务请求过程。
步骤6.11：服务网关根据与基站之间的传输路径进行下行数据的传输。
步骤6.12：基站将接收到的下行数据发送给终端。
步骤6.13：会话管理功能实体将进行服务网关选择后的终端的状态信息发送给终端状态信息管理功能实体，使得终端状态信息管理功能实体进行对应终端的状态信息的更新。
在本实施例的方案中，空闲的网络切片内的数据网关在收到下行数据时，先进行下行数据的缓存，然后触发服务网关的选择。只有在确定需要传送的服务网关后，数据网关才将下行数据发送给对应的服务网关，然后由选中的当前服务网关进行下行数据的缓存，以此减少了下行数据在网络切片内的传输，降低了网络切片内的资源消耗。同时，本实施例的方法，保证了下行数据的准确传输，提高了通信的可靠性。
如图7所示，本公开的实施例的数据传输方法的另一示例包括步骤71至步骤76。
步骤71；接收当前与第二网关功能实体连接的第三网关功能实体发送的下行数据通知消息。
在本实施例中，该第二网关功能实体指的是数据网关，该第三网关功能实体指的是与数据网关连接的原服务网关。
步骤72：根据下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息。
步骤73：接收管理终端状态的功能实体根据该请求信息反馈的终端的状态信息。
步骤74：根据该状态信息，为终端选择用于进行当前下行数据的传输的第一网关功能实体。
步骤75：确定第一网关功能实体与第二网关功能实体之间的第一数据传输路径。
步骤76：根据第一数据传输路径，进行当前下行数据的传输。
需要说明的是，该数据传输方法应用于数据传输装置。具体地，该数据传输装置可以包含在会话管理功能实体中。
在该实施例中，主要是通过与数据网关连接的原服务网关触发下行数据通知消息。在数据网关承载有限，不能接收过多的下行数据时，通过先将下行数据发送到原服务网关，然后通过原服务网关触发下行数据通知消息，使得会话管理功能实体进行服务网关的选择，保证了下行数据的准确传输。
需要说明的是，本实施例中的步骤74、步骤75以及步骤76可分别采用与步骤44、步骤45和步骤46相同的方式实现，在此不再进行赘述。
如图8所示，本公开的数据传输方法在实际应用中的具体实现流程包括步骤8.1至步骤8.14。
步骤8.1：闲置网络切片内的数据网关将接收到的下行数据发送给与其连接的原服务网关，原服务网关对该下行数据进行缓存。
步骤8.2：原服务网关向会话管理功能实体发送下行数据通知消息。
步骤8.3：会话管理功能实体在接收到下行数据通知消息时，向终端状态信息管理功能实体发送请求信息，以获取终端的状态信息。
步骤8.4：终端状态信息管理功能实体根据该请求信息向会话管理功能实 体反馈终端的状态信息；其中，终端的状态信息包括：终端处于空闲状态或连接状态以及终端的最新位置信息；当终端处于空闲状态时，其最新的位置信息为终端最近一次位置更新时的位置区信息；当终端处于连接状态时，其最新的位置信息为当前为终端服务的基站的信息。
步骤8.5：会话管理功能实体在接收到终端的状态信息后，根据该状态信息为终端选择合适的服务网关。
步骤8.6：若新的服务网关与原服务网关不同，则会话管理功能实体建立所选服务网关与数据网关之间的传输路径，即进行传输路径的更新；否则会话管理功能实体通知数据网关按原传输路径进行下行数据的传输。
步骤8.7：数据网关根据新的传输路径将下行数据发送给新服务网关。
步骤8.8：建立原服务网关到新服务网关的转发路径。
步骤8.9：原服务网关将缓存的数据发送给新服务网关。
步骤8.10：新服务网关进行下行数据的缓存。
步骤8.11：建立网络切片与接入网侧的数据传输通路。
需要说明的是，步骤8.11主要实现的是会话管理功能实体寻呼空闲状态的终端以建立空口承载，并建立基站和新服务网关之间的传输路径，具体的过程可参见上面的实施例中的建立过程，本实施例中不再进行赘述。
步骤8.12：新服务网关根据与基站间的数据传输通路进行下行数据的传输。需要说明的是，该下行数据包括新服务网关接收的数据网关发送的下行数据以及原服务网关转发给新服务网关的下行数据。
步骤8.13：基站将接收到的下行数据发送给终端。
步骤8.14：会话管理功能实体将进行服务网关选择后的终端的状态信息发送给终端状态信息管理功能实体，使得终端状态信息管理功能实体进行对应终端的状态信息的更新。
需要说明的是，在本实施例中，空闲的网络切片内的数据网关在接收到下行数据后，先按照之前建立的路径向原服务网关发送下行数据，原服务网关缓存下行数据，然后触发新服务网关的选择。在确定接收下行数据的新服务网关时，建立数据网关与新服务网关之间的传输路径，以及原服务网关与新服务网关之间的转发路径，然后由所选的新服务网关进行下行数据的缓存， 保证了下行数据的准确传输，提高了网络通信的可靠性。
如图9所示，本公开的实施例提供一种数据传输装置90。该数据传输装置90包括：获取模块91，用于获取待接收下行数据的终端的状态信息；选择模块92，用于根据状态信息，为终端选择用于进行当前下行数据的传输的第一网关功能实体；确定模块93，用于确定第一网关功能实体与第二网关功能实体之间的第一数据传输路径；以及传输模块94，用于根据第一数据传输路径，进行当前下行数据的传输。
具体地，获取模块91包括：第一接收子模块911，用于接收第二网关功能实体发送的下行数据通知消息；第一发送子模块912，用于根据下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及第二接收子模块913，用于接收管理终端状态的功能实体根据请求信息反馈的终端的状态信息。
可选地，获取模块91包括：第三接收子模块914，用于接收与第二网关功能实体当前连接的第三网关功能实体发送的下行数据通知消息；第二发送子模块915，用于根据下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及第四接收子模块916，用于接收管理终端状态的功能实体根据请求信息反馈的终端的状态信息。
具体地，选择模块92具体用于：若终端处于空闲状态，则根据终端最近一次位置更新时的位置区信息，选择用于进行当前下行数据的传输的第一网关功能实体；或者若终端处于连接状态，则根据当前为终端服务的基站信息，选择用于进行当前下行数据的传输的第一网关功能实体。
具体地，确定模块93具体用于：当与第二网关功能实体当前连接的第三网关功能实体与第一网关功能实体不同时，建立第一网关功能实体与第二网关功能实体之间的第一数据传输路径。
可选地，传输模块94包括：建立子模块941，用于根据第一数据传输路径，建立当前为终端服务的基站与第一网关功能实体之间的第二数据传输路径；传输子模块942，用于通过第二数据传输路径，将缓存在第一网关功能实体中的下行数据传输给终端。
具体地，建立子模块941包括：寻呼单元9411，用于在终端处于空闲状 态时，向处于空闲状态的终端下发寻呼消息；第一接收单元9412，用于接收终端根据寻呼消息发送的终端服务请求；第一发送单元9413，用于根据终端服务请求，向当前为终端服务的基站发送建立空口承载的请求；以及第一建立单元9414，用于在终端与基站的空口承载建立完成后，建立基站与第一网关功能实体之间的第二数据传输路径。
可选地，所述建立子模块941包括：第二发送单元9415，用于在终端处于连接状态时，向当前为终端服务的基站发送建立空口承载请求；以及第二建立单元9416，用于在终端与基站的空口承载建立完成后，建立基站与第一网关功能实体之间的第二数据传输路径。
需要说明的是，缓存在第一网关功能实体中的下行数据是由数据网关发送给第一网关功能实体的下行数据，或是与第二网关功能实体当前连接的第三网关功能实体通过转发路径转发给第一网关功能实体的下行数据。
需要说明的是，该装置的实施例是与方法实施例一一对应的装置，上述方法实施例中所有实现方式均适用于该装置的实施例中，也能达到相同的技术效果。
如图10所示，本实施例提供一种数据传输装置1010。该数据传输装置1010包括：处理器1011以及通过总线接口1012与处理器1011相连接的存储器1013。存储器1013用于存储处理器1011在执行操作时所使用的计算机指令和数据。当处理器1011调用并执行存储器1013中所存储的计算机指令和数据时，实现如下的功能模块：获取模块，获取待接收下行数据的终端的状态信息；选择模块，根据该状态信息为终端选择进行当前下行数据传输的第一网关功能实体；确定模块，确定第一网关功能实体与第二网关功能实体之间的第一数据传输路径；以及传输模块，根据第一数据传输路径，进行当前下行数据的传输。
该处理器1011还实现上述装置的其它任意一个模块的功能。需要说明的是，该装置可以为会话管理功能实体的一部分。
此外，当处理器1011调用并执行存储器1013中所存储的计算机指令和数据时，处理器1011可以实现本公开的图3至图8的实施例所述的数据传输方法。
本领域技术人员可以理解，上述实施例的全部或者部分步骤可以通过硬件来完成，也可以通过计算机程序来指示相关的硬件来完成。该计算机程序包括执行上述方法的部分或者全部步骤的指令，且该计算机程序可以存储于计算机可读存储介质中，计算机可读存储介质可以是任何形式的存储介质。
本公开的实施例还提供一种会话管理设备1110。如图11所示，该会话管理设备1110包括数据传输装置1111。该数据传输装置1111可以是上面的实施例中描述的数据传输装置，例如图9A所示的数据传输装置90或图10所示的数据传输装置1010，并且该数据传输装置1111可以包含上面的实施例描述的数据传输装置的子模块或单元或者可以实现上面描述的数据传输装置的功能。
需要说明的是，该会话管理设备在数据通信时可以实现与数据网关、服务网关以及基站的连接，从而保证网络中数据的准确传输。
以上所述的是本公开的可选实施方式。应当指出对于本领域的普通人员来说，在不脱离本公开所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (20)

  1. 一种数据传输方法，包括：
    获取待接收下行数据的终端的状态信息；
    根据所述状态信息，为所述终端选择用于进行当前下行数据传输的第一网关功能实体；
    确定所述第一网关功能实体与第二网关功能实体之间的第一数据传输路径；以及
    根据所述第一数据传输路径，进行所述当前下行数据的传输。
  2. 根据权利要求1所述的数据传输方法，其中，获取待接收下行数据的终端的状态信息包括：
    接收由所述第二网关功能实体发送的下行数据通知消息；
    根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及
    接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
  3. 根据权利要求1所述的数据传输方法，其中，获取待接收下行数据的终端的状态信息包括：
    接收当前与所述第二网关功能实体连接的第三网关功能实体发送的下行数据通知消息；
    根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及
    接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
  4. 根据权利要求1所述的数据传输方法，其中，根据所述状态信息，为所述终端选择用于进行当前下行数据的传输的第一网关功能实体包括：
    若所述终端处于空闲状态，则根据终端最近一次位置更新时的位置区信息，选择用于进行当前下行数据的传输的第一网关功能实体；或者
    若所述终端处于连接状态，则根据当前为终端服务的基站的信息，选择 用于进行当前下行数据的传输的第一网关功能实体。
  5. 根据权利要求1所述的数据传输方法，其中，确定所述第一网关功能实体与第二网关功能实体之间的第一数据传输路径包括：
    当与所述第二网关功能实体当前连接的第三网关功能实体与所述第一网关功能实体不同时，建立所述第一网关功能实体与所述第二网关功能实体之间的所述第一数据传输路径。
  6. 根据权利要求1所述的数据传输方法，其中，根据所述第一数据传输路径，进行所述当前下行数据的传输包括：
    根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径；以及
    通过所述第二数据传输路径，将缓存在所述第一网关功能实体中的下行数据传输给所述终端。
  7. 根据权利要求6所述的数据传输方法，其中，根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径包括：
    在所述终端处于空闲状态时，向处于空闲状态的所述终端下发寻呼消息；
    接收所述终端根据所述寻呼消息发送的终端服务请求；
    根据所述终端服务请求，向所述当前为终端服务的基站发送建立空口承载的请求；以及
    在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的所述第二数据传输路径。
  8. 根据权利要求6所述的数据传输方法，其中，根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径包括：
    在所述终端处于连接状态时，向所述当前为终端服务的基站发送建立空口承载的请求；以及
    在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的第二数据传输路径。
  9. 根据权利要求6所述的数据传输方法，其中，缓存在所述第一网关功 能实体中的下行数据是：
    所述第二网关功能实体发送给所述第一网关功能实体的下行数据；或
    与所述第二网关功能实体当前连接的第三网关功能实体通过转发路径转发给所述第一网关功能实体的下行数据。
  10. 一种数据传输装置，包括：
    获取模块，用于获取待接收下行数据的终端的状态信息；
    选择模块，用于根据所述状态信息，为所述终端选择用于进行当前下行数据的传输的第一网关功能实体；
    确定模块，用于确定所述第一网关功能实体与第二网关功能实体之间的第一数据传输路径；以及
    传输模块，用于根据所述第一数据传输路径，进行当前下行数据的传输。
  11. 根据权利要求10所述的数据传输装置，其中，所述获取模块包括：
    第一接收子模块，用于接收第二网关功能实体发送的下行数据通知消息；
    第一发送子模块，用于根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及
    第二接收子模块，用于接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
  12. 根据权利要求10所述的数据传输装置，其中，所述获取模块包括：
    第三接收子模块，用于接收当前与第二网关功能实体连接的第三网关功能实体发送的下行数据通知消息；
    第二发送子模块，用于根据所述下行数据通知消息，向管理终端状态的功能实体发送获取终端的状态信息的请求信息；以及
    第四接收子模块，用于接收所述管理终端状态的功能实体根据所述请求信息反馈的所述终端的状态信息。
  13. 根据权利要求10所述的数据传输装置，其中，所述选择模块具体用于：
    若所述终端处于空闲状态，根据终端最近一次位置更新时的位置区信息，选择进行当前下行数据传输的第一网关功能实体；或者
    若所述终端处于连接状态，根据当前为终端服务的基站信息，选择进行 当前下行数据传输的第一网关功能实体。
  14. 根据权利要求10所述的数据传输装置，其中，所述确定模块具体用于：
    当与所述第二网关功能实体当前连接的第三网关功能实体与所述第一网关功能实体不同时，建立所述第一网关功能实体与所述第二网关功能实体之间的第一数据传输路径。
  15. 根据权利要求10所述的数据传输装置，其中，所述传输模块包括：
    建立子模块，用于根据所述第一数据传输路径，建立当前为终端服务的基站与所述第一网关功能实体之间的第二数据传输路径；以及
    传输子模块，用于通过所述第二数据传输路径，将缓存在所述第一网关功能实体中的下行数据传输给所述终端。
  16. 根据权利要求15所述的数据传输装置，其中，所述建立子模块包括：
    寻呼单元，用于在所述终端处于空闲状态时，向处于空闲状态的所述终端下发寻呼消息；
    第一接收单元，用于接收所述终端根据所述寻呼消息发送的终端服务请求；
    第一发送单元，用于根据所述终端服务请求，向当前为所述终端服务的基站发送建立空口承载的请求；以及
    第一建立单元，用于在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的第二数据传输路径。
  17. 根据权利要求15所述的数据传输装置，其中，所述建立子模块包括：
    第二发送单元，用于在所述终端处于连接状态时，向当前为所述终端服务的基站发送建立空口承载的请求；以及
    第二建立单元，用于在所述终端与所述基站的空口承载建立完成后，建立所述基站与所述第一网关功能实体之间的第二数据传输路径。
  18. 根据权利要求15所述的数据传输装置，其中，缓存在所述第一网关功能实体中的下行数据是：
    所述第二网关功能实体发送给所述第一网关功能实体的下行数据；或
    当前与所述第二网关功能实体连接的第三网关功能实体通过转发路径转 发给所述第一网关功能实体的下行数据。
  19. 一种数据传输装置，包括：
    处理器，
    存储器，通过总线接口与所述处理器连接，并且用于存储由所述处理器在执行操作时所使用的计算机指令和数据，
    其中所述计算机指令在由所述处理器执行时实现根据权利要求1-9中任一项所述的方法。
  20. 一种会话管理设备，包括如权利要求10-19任一项所述的数据传输的装置。
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US20190110330A1 (en) 2019-04-11
US11490443B2 (en) 2022-11-01
TWI634801B (zh) 2018-09-01
EP3439269B1 (en) 2020-04-08
CN107241369B (zh) 2020-06-16
JP6730447B2 (ja) 2020-07-29
KR20180122699A (ko) 2018-11-13
JP2019511880A (ja) 2019-04-25
EP3439269A1 (en) 2019-02-06
TW201735684A (zh) 2017-10-01
CN107241369A (zh) 2017-10-10
KR102147225B1 (ko) 2020-08-24
EP3439269A4 (en) 2019-03-13

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