WO2017028159A1 - 一种gtp-u下行报文的发送方法及装置 - Google Patents

一种gtp-u下行报文的发送方法及装置 Download PDF

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Publication number
WO2017028159A1
WO2017028159A1 PCT/CN2015/087238 CN2015087238W WO2017028159A1 WO 2017028159 A1 WO2017028159 A1 WO 2017028159A1 CN 2015087238 W CN2015087238 W CN 2015087238W WO 2017028159 A1 WO2017028159 A1 WO 2017028159A1
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Prior art keywords
gtp
packet
base station
station device
teid
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PCT/CN2015/087238
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English (en)
French (fr)
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时晓岩
熊春山
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华为技术有限公司
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Priority to KR1020187005968A priority Critical patent/KR20180034632A/ko
Priority to CN201580065509.7A priority patent/CN107005824B/zh
Priority to PCT/CN2015/087238 priority patent/WO2017028159A1/zh
Priority to EP15901364.8A priority patent/EP3324659A4/en
Publication of WO2017028159A1 publication Critical patent/WO2017028159A1/zh
Priority to US15/897,589 priority patent/US10608842B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H04L61/4588—Network directories; Name-to-address mapping containing mobile subscriber information, e.g. home subscriber server [HSS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2212/00—Encapsulation of packets
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/10—Mobility data transfer between location register and external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/14—Interfaces between hierarchically different network devices between access point controllers and backbone network device

Definitions

  • the present invention relates to a communication technology, and in particular, to a method and an apparatus for transmitting a downlink packet of a General Packet Radio System (GPRS) Tunneling Protocol-User Plane (GTP-U).
  • GPRS General Packet Radio System
  • GTP-U General Packet Radio System Tunneling Protocol-User Plane
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • EPS Evolved Packet System
  • FIG. 1 is a schematic diagram of an EPS wireless network architecture in the prior art.
  • the user equipment User Equipment, UE for short
  • the UE can access the Serving Gateway through the S4 interface.
  • SGW Packet Data Network Gateway
  • PDN-GW Packet Data Network Gateway
  • Evolved Universal Terrestrial Radio Access Network A network consisting of multiple evolved base stations (eNodeBs) that implements wireless physical layer functions, resource scheduling, radio resource management, and radio access. Control and mobility management capabilities.
  • the eNodeB is connected to the SGW through the user plane interface (S1-U interface) for transmitting user data; and is connected to the mobility management entity (Mobility Management Entity, MME for short) through the control plane interface (S1-MME interface), and is used for adopting S1.
  • the S1 Application Protocol (S1-AP) implements the radio access bearer control function.
  • MME mainly responsible for UE mobility management, session management, non-access stratum (NAS) signaling encryption and integrity protection, tracking area list (Tracking Area List) management, PGW/SGW choose other features.
  • NAS non-access stratum
  • PGW/SGW choose other features.
  • SGW It is mainly responsible for data transmission, forwarding, and routing handover of the UE, and is used as a local mobility anchor point when the UE switches between eNodeBs.
  • PGW An external network sends an entry for data to the UE. It is mainly responsible for IP address allocation, data packet filtering, rate control, and accounting information generation.
  • PCRF Policy and Charging Rules Function
  • the function entity determines the corresponding policy according to the restriction of the user access network, the operator policy, the user subscription data, and the service information currently being performed by the user.
  • the policy is provided to the transport gateway for implementation, thereby implementing policy charging control.
  • Carrier IP services are implemented in the LTE network through an IP Multimedia Subsystem (IMS) network.
  • IMS IP Multimedia Subsystem
  • PSS Packet Switched Streaming Service
  • the PSS network architecture mainly includes a mobile terminal and a PSS server on the network side.
  • the data packets sent and received by the UE are transmitted through the EPS bearer in the EPS network.
  • the EPS bearer below may also be referred to as a bearer.
  • Each UE can have multiple bearers, and different bearers can meet the quality of service (QoS) requirements of different services.
  • the eNodeB and the SGW store the information of each bearer, that is, the bearer context.
  • the bearer context includes the Tunnel Endpoint Identifier (TEID) and the eNodeB TEID of the SGW.
  • the SGW TEID is used for the eNodeB to send packets to the SGW.
  • the eNodeB TEID is used by the SGW to send the eNodeB to the eNodeB. Message.
  • the eNodeB synchronizes with the MME by using the S1-AP message
  • the SGW synchronizes with the MME by using the GPRS Tunneling Protocol-Control Plane (GTP-C) message to implement the bearer context, thereby implementing the eNodeB and the SGW.
  • GTP-C GPRS Tunneling Protocol-Control Plane
  • the eNodeB When receiving the uplink packet sent by the UE, the eNodeB encapsulates the uplink packet of the UE into a GTP-U packet according to the bearer context, where the GTP-U packet includes a GTP-U header, and the GTP-U header includes the SGW. TEID.
  • the SGW can use the different SGW TEIDs. Therefore, when the SGW receives the GTP-U packet from the eNodeB, the SGW can determine the bearer to which the GTP-U packet belongs according to the GTP-U header.
  • the SGW when the SGW receives the downlink packet sent to the UE, the SGW encapsulates the packet of the UE into a GTP-U packet, where the GTP-U packet includes the GTP-U header, and the GTP-U header includes the eNodeB TEID.
  • the eNodeB receives the GTP-U packet sent by the SGW, the eNodeB can determine the GTP-U header according to the GTP-U header. The bearer to which the GTP-U packet belongs.
  • the Mobile Edge Computing (MEC) platform is a logical network element deployed on the S1-U interface between the eNodeB and the SGW.
  • the MEC platform is mainly composed of a data bus and an application.
  • the data bus is responsible for acquiring the data packet of the UE and forwarding it to the corresponding application. After processing the data packet, the application sends the processed data packet to the data.
  • the bus is routed.
  • the application on the MEC platform can intercept the uplink packets sent by the UE, and modify, detect, and forward the uplink packets of the UE, and directly respond to the uplink packets sent by the UE.
  • the MEC platform can install a video cache application.
  • the video request packet of the UE is processed by the video cache application. If the video cache application does not have the video requested by the UE, the video cache application forwards the user.
  • the video request message is sent to the SGW; if the video cache application stores the video requested by the UE, the video buffer application directly sends the video response message to the UE.
  • the MEC platform directly responds to the uplink message of the UE, the MEC platform cannot correctly perform the GTP-U encapsulation, and thus cannot send the response message corresponding to the uplink message of the UE to the eNodeB.
  • the embodiment of the present invention provides a method and a device for transmitting a GTP-U downlink packet, which is used to solve the problem that the MEC platform cannot directly perform the GTP-U encapsulation when the MEC platform directly responds to the uplink packet of the UE, thereby failing to The eNodeB sends a response message corresponding to the uplink message of the UE.
  • the first aspect provides a method for sending a GTP-U downlink packet, including:
  • the mobile edge computing MEC platform receives the GTP-U uplink packet sent by the base station device.
  • the MEC platform sends a GTP-U downlink message to the base station device, where the GTP-U downlink message includes a TEID of the base station device.
  • the second aspect provides a device for sending a GTP-U downlink packet, including: a network interface and a processor,
  • the network interface is configured to receive a GTP-U uplink packet sent by the base station device;
  • the processor is configured to acquire, according to the GTP-U uplink packet, the tunnel of the base station device
  • the endpoint ID identifies the TEID
  • the network interface is further configured to send a GTP-U downlink message to the base station device, where the GTP-U downlink message includes a TEID of the base station device.
  • the MEC platform after receiving the GTP-U uplink packet sent by the base station device, the MEC platform can obtain the TEID of the base station device according to the GTP-U uplink packet, so that the GTP-U encapsulation can be correctly performed to the base station device. Send GTP-U downlink packets.
  • FIG. 1 is a schematic diagram of an EPS wireless network architecture in the prior art
  • FIG. 2 is a flowchart of a method for transmitting a GTP-U downlink packet according to the first embodiment of the present invention
  • FIG. 3 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a second embodiment of the present invention
  • FIG. 4 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a third embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a fourth embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a fifth embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a sixth embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a seventh embodiment of the present invention.
  • FIG. 9 is a schematic diagram of an apparatus for transmitting a GTP-U downlink packet according to an eighth embodiment of the present invention.
  • the communication system involved in the embodiment of the present invention may be a second generation (The Second Generation, 2G) mobile communication system, for example, a global mobile communication system (Global System for Mobile) Communications, referred to as GSM), or the Third Generation (3G) mobile communication system, such as the Universal Mobile Telecommunications System (UMTS), or the Fourth Generation (4G) A mobile communication system, such as a Long Term Evolution (LTE) system.
  • GSM Global System for Mobile
  • 3G Third Generation
  • UMTS Universal Mobile Telecommunications System
  • 4G Fourth Generation
  • a mobile communication system such as a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the communication system involved in the embodiment of the present invention may also be a new generation mobile communication system, such as the fifth generation (5G) mobile communication system.
  • the UE involved in the embodiment of the present invention may be a wireless terminal, and the wireless terminal may be a device that provides voice or data connectivity to the user, a handheld device with a wireless connection function, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (for example, a Radio Access Network, RAN for short), and the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone), or A computer with a mobile terminal, such as a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice or data with a wireless access network.
  • a radio access network for example, a Radio Access Network, RAN for short
  • RAN Radio Access Network
  • a computer with a mobile terminal such as a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice or data with a wireless access network.
  • the wireless terminal may be a personal communication service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, or an individual.
  • PCS personal communication service
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • a wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, and an Access Point.
  • AP Remote Terminal
  • Access Terminal User Terminal
  • User Agent User Agent
  • the base station device involved in the embodiment of the present invention may be a base transceiver station (Base Transceiver Station, BTS for short) in the GSM system; or a NodeB in the UMTS system; or an evolved base station (eNodeB) in the LTE system.
  • BTS Base Transceiver Station
  • eNodeB evolved base station
  • the base station device in the embodiment of the present invention includes the base station device in the existing communication system, and the base station device in the communication system that may appear in the future, which is not limited in the embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for transmitting a GTP-U downlink packet according to the first embodiment of the present invention. As shown in FIG. 2, the method in this embodiment includes:
  • the mobile edge computing MEC platform receives the GTP-U uplink packet sent by the base station device.
  • the GTP-U uplink packet includes an uplink data packet sent by the UE and a bearer context of the UE.
  • the uplink data packet includes an Internet Protocol IP address of the UE.
  • the uplink data packet has an IP header, and the source address in the IP header is the IP address of the UE.
  • the MEC platform includes a data bus, and the data bus receives the GTP-U uplink packet sent by the base station device.
  • the MEC platform after receiving the GTP-U uplink packet sent by the base station device, the MEC platform further generates a downlink data packet that needs to be sent to the UE according to the GTP-U uplink packet.
  • the MEC platform further includes an application, and the application generates a downlink data packet according to the GTP-U uplink packet.
  • the data bus decapsulates the GTP-U uplink packet, and sends the decapsulated GTP-U uplink packet to the application; the application generates the downlink data packet according to the decapsulated GTP-U uplink packet.
  • the MEC platform acquires a TEID of the base station device according to the GTP-U uplink packet.
  • the MEC platform may obtain the TEID of the base station device according to one of the following methods according to the GTP-U uplink packet:
  • the MEC platform generates a first IP packet according to the GTP-U uplink packet, where the first IP packet includes the IP address of the UE.
  • the destination address in the IP header of the first IP packet is an IP address of the UE.
  • the application generates a first IP packet according to the GTP-U uplink packet.
  • the data bus decapsulates the GTP-U uplink packet, and sends the decapsulated GTP-U uplink packet to the application, and the application generates the first IP packet according to the decapsulated GTP-U uplink packet.
  • the first IP packet may be a downlink data packet that needs to be sent to the UE, or may be a packet with an empty payload, or may be a packet that includes the identifier of the MEC platform.
  • the MEC platform sends a first IP packet to the IP network, where the first IP packet is sent to the IP network and is routed to the packet data gateway PGW based on the IP address of the UE, so that the PGW sends the first GTP-U to the serving gateway SGW.
  • the first GTP-U packet contains the first IP packet.
  • the data bus sends the first IP packet to the IP network.
  • the first IP packet further includes a bearer context of the UE. After the first IP packet is routed to the PGW, the PGW encapsulates the first IP packet into the first GTP-U format according to the bearer context of the UE. Message.
  • the SGW TEID is used in the first GTP-U format packet, and the SGW TEID is used by the PGW to send the first GTP-U format packet to the SGW.
  • the MEC platform receives the second GTP-U format message sent by the SGW, and the second GTP-U format message is generated by the SGW according to the first GTP-U format message, where the second GTP-U format report is generated.
  • the text includes the first IP packet and the TEID of the base station device.
  • the data bus receives the second GTP-U format message sent by the SGW.
  • the SGW decapsulates the first GTP-U format packet, and removes the SGW TEID to obtain the first IP packet.
  • the SGW generates a packet in the second GTP-U format according to the first IP packet.
  • the SGW encapsulates the first IP packet into the second GTP-U format according to the bearer context of the UE in the first IP packet, where the GTP-U of the second GTP-U format packet
  • the header contains the TEID of the base station device of the bearer.
  • the MEC platform acquires the TEID of the base station device according to the second GTP-U format message.
  • the data bus acquires the TEID of the base station device according to the second GTP-U format message.
  • This method does not require upgrades of devices other than the MEC platform, nor does it require deployment of server devices, which is compatible with existing devices, so the deployment speed is faster and the cost is lower.
  • the MEC platform generates a second IP packet according to the GTP-U uplink packet, where the second IP packet includes the IP address of the UE.
  • the destination address in the IP header of the second IP packet is the IP address of the UE.
  • the application generates a second IP packet according to the GTP-U uplink packet.
  • the data bus decapsulates the GTP-U uplink packet, and sends the decapsulated GTP-U uplink packet to the application, and generates a second IP packet according to the decapsulated GTP-U uplink packet.
  • the second IP packet may be a packet with an empty payload or a packet containing the identifier of the MEC platform.
  • the MEC platform sends a second IP packet to the server through the SGW and the PGW, so that the server generates a response packet according to the second IP packet, and then sends the response packet to the PGW, so that the PGW sends the third GTP to the SGW.
  • the U format packet contains the response packet in the third GTP-U format.
  • the data bus sends the second IP packet to the server through the SGW and the PGW.
  • the response packet includes the bearer context of the UE, and after the PGW receives the response packet, the PGW encapsulates the response packet into the third GTP-U format packet according to the bearer context of the UE.
  • the SGW TEID is used in the third GTP-U format packet, and the SGW TEID is used by the PGW to send the third GTP-U format packet to the SGW.
  • the MEC platform receives the fourth GTP-U format message sent by the SGW, and the fourth GTP-U format message is generated by the SGW according to the third GTP-U format message, where the fourth GTP-U format is generated.
  • the message contains the response message and the TEID of the base station device.
  • the data bus receives the fourth GTP-U format message sent by the SGW.
  • the SGW decapsulates the third GTP-U format packet, removes the SGW TEID, and obtains the response packet.
  • the SGW generates a packet in the fourth GTP-U format according to the response packet.
  • the SGW encapsulates the response packet into the fourth GTP-U format packet according to the bearer context of the UE in the response packet, where the GTP-U header of the fourth GTP-U format packet is in the GTP-U header.
  • the TEID of the base station device that contains the bearer is not limited to the bearer.
  • the MEC platform acquires the TEID of the base station device according to the fourth GTP-U format message.
  • the data bus acquires the TEID of the base station device according to the fourth GTP-U format message.
  • the MEC platform sends the GTP-U uplink packet to the PGW through the SGW, and decapsulates the GTP-U uplink packet through the PGW, and then sends the decapsulated GTP-U uplink packet to the server, so that the server is based on the decapsulated GTP.
  • the response message is sent to the PGW, so that the PGW sends the fifth GTP-U format message to the SGW, and the fifth GTP-U format message includes the response.
  • the data bus sends the GTP-U uplink packet to the PGW through the SGW.
  • the PGW after decapsulating the GTP-U uplink packet, sends the decapsulated GTP-U uplink packet to the server.
  • the server receives the decapsulated GTP-U uplink packet, and generates a response packet according to the decapsulated GTP-U uplink packet.
  • the response packet includes the bearer context of the UE, and after the PGW receives the response packet, the PGW encapsulates the response packet into the fifth GTP-U format packet according to the bearer context of the UE.
  • the message in the fifth GTP-U format includes the SGW TEID, and the SGW TEID is used by the PGW to send the fifth GTP-U format message to the SGW.
  • the MEC platform receives the sixth GTP-U format message sent by the SGW, and the sixth GTP-U format message is generated by the SGW according to the fifth GTP-U format message, wherein the sixth GTP-U format report
  • the text contains the response message and the TEID of the base station device.
  • the data bus receives the sixth GTP-U format message sent by the SGW.
  • the SGW generates a sixth GTP-U format message according to the fifth GTP-U format message
  • the second mode SGW generates the fourth GTP-U according to the third GTP-U format message.
  • the process of the formatted message is similar. For details, refer to the detailed description in the second mode, and details are not described herein again.
  • the MEC platform acquires the TEID of the base station device according to the sixth GTP-U format message.
  • the data bus acquires the TEID of the base station device according to the message in the sixth GTP-U format.
  • the MEC platform sends a bearer context request message to the SGW or the service capability open platform, where the bearer context request message is used to query the SGW or the service capability open platform for the TEID of the base station device, where the bearer context request message includes the IP quintuple information, and the IP five
  • the destination address in the tuple information is the IP address of the UE.
  • the data bus sends a bearer context request message to the SGW or the service capability open platform.
  • the MEC platform may send the IP quintuple information to the PGW according to the GTP-U protocol to query the SGW TEID, so as to send a bearer context request message to the SGW according to the SGW TEID; or the MEC platform may send the bearer to the SGW according to the PMIP protocol.
  • Context request message After receiving the bearer context request message sent by the MEC platform, the SGW or the service capability platform queries the TEID of the base station device according to the IP quintuple information.
  • the MEC platform receives the bearer context response message sent by the SGW or the service capability open platform.
  • the bearer context response message includes the TEID of the base station device, and the TEID of the base station device is the SGW or the service capability open platform is queried according to the IP quintuple information.
  • the data bus receives a bearer context response message sent by the SGW or the service capability open platform.
  • the MEC platform acquires the TEID of the base station device according to the bearer context response message.
  • the data bus acquires the TEID of the base station device according to the bearer context response message.
  • the service capability open platform involved in this mode is a functional entity defined by the 3GPP.
  • the platform can collect information about each network element in the 3GPP network, such as device information and user context information.
  • the application platform interface API
  • the service capability open platform corresponds to the Service Capability Exposure Function in the standard defined by the 3GPP, and may be simply referred to as SCEF.
  • This method does not require additional deployment of server devices, so it is simpler to implement, less expensive, and lower maintenance costs.
  • the GTP-U uplink packet contains the TEID of the base station device, and the MEC platform obtains the TEID of the base station device included in the GTP-U uplink packet.
  • the data bus acquires the TEID of the base station device included in the GTP-U uplink packet.
  • the GTP-U downlink packet includes a downlink data packet to be sent to the UE, and the MEC Before the platform obtains the TEID of the base station device according to the GTP-U uplink packet, the MEC platform further determines, according to the downlink data packet, the TEID of the base station device that is not stored.
  • the data bus further determines, according to the downlink data packet, that the TEID of the base station device is not stored.
  • the MEC platform after the MEC platform acquires the TEID of the base station device according to the GTP-U uplink packet, the MEC platform further stores the TEID of the base station device.
  • the data bus also stores the TEID of the base station device.
  • the MEC platform sends a GTP-U downlink packet to the base station device, where the GTP-U downlink packet includes the TEID of the base station device.
  • the data bus sends a GTP-U downlink message to the base station device.
  • the GTP-U downlink packet further includes a downlink data packet that needs to be sent to the UE.
  • the MEC platform after the MEC platform sends the GTP-U downlink packet to the base station device, the MEC platform further receives the GTP-U uplink packet sent by the base station device, and determines, according to the GTP-U uplink packet, the TEID of the base station device.
  • the base station device sends a GTP-U downlink packet, and the GTP-U downlink packet includes the TEID of the base station device.
  • the MEC platform generates a downlink data packet according to the GTP-U uplink packet, and determines, according to the downlink data packet, a TEID in which the base station device is stored.
  • the MEC platform after receiving the GTP-U uplink packet sent by the base station device, the MEC platform can obtain the TEID of the base station device according to the GTP-U uplink packet, so that the GTP-U encapsulation can be correctly performed and sent to the base station device. GTP-U downlink message.
  • the MEC platform can determine whether the TEID of the base station device is stored, and if not, store the TEID of the base station device after acquiring the TEID of the base station device. If it is stored, it can directly perform GTP-U encapsulation and send GTP-U downlink packets to the base station device.
  • the LTE system is used as an application scenario, and the base station device is an eNodeB.
  • the TEID of the base station device may be referred to as an eNodeB TEID.
  • FIG. 3 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a second embodiment of the present invention.
  • the method in this embodiment includes:
  • the eNodeB sends a GTP-U uplink packet to the MEC platform.
  • the GTP-U uplink packet includes an uplink data packet sent by the UE, and the uplink number is The IP address of the UE is included in the message.
  • the MEC platform receives the GTP-U uplink packet sent by the eNodeB. After the MEC platform determines that the eNodeB TEID is not stored, the MEC platform generates a first IP packet, where the first IP packet includes the IP address of the UE.
  • the MEC platform generates a downlink data packet that needs to be sent to the UE according to the GTP-U uplink packet, and determines that the eNodeB TEID is not stored according to the downlink data packet.
  • the MEC platform sends a first IP packet to the IP network.
  • the PGW is routed based on the IP address of the UE.
  • the PGW After receiving the first IP packet, the PGW generates the first GTP-U format packet according to the first IP packet, and sends the first GTP-U format packet to the SGW.
  • the first IP packet includes a bearer context of the UE
  • the PGW encapsulates the first IP packet into the first GTP-U format packet according to the bearer context of the UE, and the first GTP-U format packet is used.
  • the SGW receives the first GTP-U format packet sent by the PGW, and generates a second GTP-U format packet according to the first GTP-U format packet, and sends the second GTP-U format to the MEC platform. Message.
  • the SGW decapsulates the first GTP-U packet, removes the SGW TEID, and obtains the first IP packet, and then encapsulates the first IP packet into the second GTP-U according to the bearer context of the UE.
  • the formatted packet contains the eNodeB TEID in the second GTP-U format.
  • the MEC platform receives the second GTP-U format message sent by the SGW, and obtains and stores the eNodeB TEID according to the second GTP-U format message.
  • the MEC platform sends a GTP-U downlink packet to the eNodeB, where the GTP-U downlink packet includes an eNodeB TEID.
  • the MEC platform encapsulates the downlink data packet that needs to be sent to the UE into a GTP-U downlink packet.
  • the MEC platform receives the GTP-U uplink packet sent by the eNodeB.
  • the MEC platform determines, according to the GTP-U uplink packet, that the eNodeB TEID is stored.
  • the MEC platform generates a downlink data packet that needs to be sent to the UE according to the GTP-U uplink packet, and determines that the eNodeB TEID is stored according to the downlink data packet.
  • the MEC platform sends a GTP-U downlink packet to the eNodeB, and the GTP-U downlink packet is included in the packet. Contains eNodeB TEID.
  • the MEC platform after receiving the GTP-U uplink packet sent by the base station device, the MEC platform generates the first IP packet according to the GTP-U uplink packet, and sends the first IP packet to the IP network, and then receives the SGW.
  • the GTP-U format packet of the TEID of the base station device is sent, so that the correctly encapsulated GTP-U downlink packet is sent to the base station device after acquiring the TEID of the base station device.
  • the method in this embodiment does not need to upgrade other devices except the MEC platform, and does not require deployment of the server device, and is compatible with the existing device, so the deployment speed is faster and the cost is lower.
  • FIG. 4 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a third embodiment of the present invention.
  • FIG. 4 For the content of the first embodiment, reference may be made to the detailed description in the first embodiment, and details are not described herein again.
  • the step 401 and the step 402 are similar to the step 301 and the step 302 in the second embodiment, wherein the second IP packet in the step 402 corresponds to the first IP packet in the step 302, and the other content is no longer used. Narration.
  • the MEC platform sends a second IP packet to the server through the SGW and the PGW.
  • the server After the server generates the response packet according to the second IP packet, the server sends a response packet to the PGW, where the response packet includes the IP address of the UE.
  • the PGW receives the response packet sent by the server, and generates a third GTP-U format packet according to the response packet, and then sends the third GTP-U format packet to the SGW.
  • the response packet includes the bearer context of the UE
  • the PGW encapsulates the response packet into the third GTP-U format packet according to the bearer context of the UE, where the third GTP-U format packet includes the SGW. TEID.
  • the SGW receives the third GTP-U format packet sent by the PGW, and generates a fourth GTP-U format packet according to the third GTP-U format packet, and sends the fourth GTP-U format to the MEC platform. Message.
  • the SGW decapsulates the third GTP-U format packet, removes the SGW TEID, and obtains the response packet, and then encapsulates the response packet into the fourth GTP-U format according to the bearer context of the UE.
  • the eNodeB TEID is included in the packet in the fourth GTP-U format.
  • the MEC platform receives the fourth GTP-U format message sent by the SGW, and obtains and stores the eNodeB TEID according to the fourth GTP-U format message.
  • the steps 410 to 413 are similar to the steps 308 to 311 in the second embodiment, and are not described here.
  • FIG. 5 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a fourth embodiment of the present invention.
  • a GTP-U downlink packet according to a fourth embodiment of the present invention.
  • step 501 is similar to step 401 in the third embodiment, and details are not described herein again.
  • the MEC platform After receiving the GTP-U uplink packet sent by the eNodeB, the MEC platform determines that the eNodeB TEID is not stored according to the GTP-U uplink packet.
  • the MEC platform generates a downlink data packet that needs to be sent to the UE according to the GTP-U uplink packet, and determines that the eNodeB TEID is not stored according to the downlink data packet.
  • the MEC platform sends a GTP-U uplink packet to the PGW through the SGW.
  • the PGW After receiving the GTP-U uplink packet, the PGW decapsulates the GTP-U uplink packet, and sends the decapsulated GTP-U uplink packet to the server.
  • the steps 506 to 513 are similar to the steps 406 to 413 in the third embodiment, wherein the difference is that the response packet in the step 406 is a response packet generated by the server according to the second IP packet, and in step 506.
  • the response packet is a packet that is generated by the server according to the decapsulated GTP-U uplink packet.
  • the fifth and sixth GTP-U packets in this embodiment are respectively the third in the third embodiment.
  • the fourth GTP-U format message is similar to other content and will not be described again.
  • FIG. 6 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a fifth embodiment of the present invention.
  • FIG. 6 For the content of the first embodiment, reference may be made to the detailed description in the first embodiment, and details are not described herein again.
  • the steps 601 and 602 are similar to the steps 501 and 502 in the fourth embodiment, and details are not described herein again.
  • the MEC platform sends a bearer context request message to the SGW or the service capability open platform, where the bearer context request message is used to query the SGW or the service capability open platform for the TEID of the base station device, where the bearer context request message includes the IP quintuple information.
  • the destination address in the IP quintuple information is the IP address of the UE.
  • the SGW or the service capability open platform After receiving the bearer context request message sent by the SGW, the SGW or the service capability open platform queries the eNodeB TEID according to the IP quintuple information. SGW or service capability open platform The bearer context response message is sent to the MEC platform, and the bearer context response message includes an eNodeB TEID.
  • Steps 605 to 609 are similar to the steps 509 to 513 in the fourth embodiment, and are not described here.
  • the MEC platform sends a bearer context request message including the IP quintuple information to the SGW or the service capability open platform, so as to obtain the TEID of the base station device that the SGW or the service capability open platform queries according to the IP quintuple information, Sending correctly encapsulated GTP-U downlink packets to the base station device.
  • the method in this embodiment does not need to deploy an additional server device, and the implementation is relatively simple, the overhead is low, and the maintenance cost is low.
  • FIG. 7 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a sixth embodiment of the present invention.
  • the method of this embodiment includes:
  • the eNodeB sends the GTP-U uplink packet to the MEC platform, where the GTP-U uplink packet includes the eNodeB TEID.
  • the MEC platform obtains and stores the eNodeB TEID after determining that the eNodeB TEID is not stored according to the GTP-U uplink packet.
  • the MEC platform generates a downlink data packet that needs to be sent to the UE according to the GTP-U uplink packet, and determines that the eNodeB TEID is not stored according to the downlink data packet.
  • the steps 703 to 706 are similar to the steps 606 to 609 in the fifth embodiment, and are not described here.
  • FIG. 8 is a schematic diagram of a method for transmitting a GTP-U downlink packet according to a seventh embodiment of the present invention.
  • This embodiment is based on the second embodiment, and the MEC platform includes a data bus and an application as an example for description.
  • the MEC platform includes a data bus and an application as an example for description.
  • step 801 and the step 805 to the step 813 are similar to the step 301 and the step 303 to the step 311 in the second embodiment, wherein the data bus in the step 801 and the step 805 to the step 813 corresponds to the step 301 and the step 303.
  • the MEC platform in step 311, other content will not be described again.
  • Step 302 in the second embodiment corresponds to the following three steps in this embodiment:
  • the data bus decapsulates the GTP-U uplink packet.
  • the decapsulated GTP-U uplink packet is sent to the application.
  • the application generates a first IP packet according to the decapsulated GTP-U uplink packet, and sends the first IP packet to the data bus.
  • the data bus receives the first IP packet sent by the application, and determines, according to the first IP packet, that the eNodeB TEID is not stored.
  • the MEC platform may also include a data bus and an application, wherein steps 402, 502, 602, and 702 in the third to sixth embodiments may respectively correspond to The three steps of the data bus and the application interaction with the steps 802 to 804 in the seventh embodiment, the steps of the other steps of the third to sixth embodiments involving the MEC platform are completed by the data bus, and other contents are not described again. .
  • FIG. 9 is a schematic diagram of an apparatus for transmitting a GTP-U downlink packet according to an eighth embodiment of the present invention.
  • the GRT-U downlink packet sending apparatus 900 includes: a network interface 901 and a processor 902.
  • the network interface 901 is configured to receive the GTP-U uplink message sent by the base station device, and send the GTP-U downlink message to the base station device, where the GTP-U downlink message includes the TEID of the base station device.
  • the network interface 901 is configured to: after the processor 902 generates the first IP packet, send the first IP packet to the IP network, where the first IP packet is sent to the IP network, and the IP address is routed based on the UE.
  • the PGW sends the first GTP-U format message to the serving gateway SGW, and the first GTP-U format message includes the first IP packet.
  • the network interface 901 is further configured to: after sending the first IP packet to the IP network, receive the second GTP-U format packet sent by the SGW, where the second GTP-U format packet is the SGW according to the first The GTP-U format message is generated, where the second GTP-U format message includes the first IP packet and the TEID of the base station device.
  • the network interface 901 is configured to: after the processor 902 generates the second IP packet, send the second IP packet to the server by using the SGW and the PGW, so that the server generates the response packet according to the second IP packet, Sending the response packet to the PGW, so that the PGW sends the third GTP-U format message to the SGW, and the third GTP-U format message includes the response message.
  • the network interface 901 is further configured to send the second IP to the server by using the SGW and the PGW.
  • the fourth GTP-U format packet is sent by the SGW, and the fourth GTP-U format packet is generated by the SGW according to the third GTP-U format packet, where the fourth GTP-U format is generated.
  • the message contains the response message and the TEID of the base station device.
  • the network interface 901 is configured to: after receiving the GTP-U uplink packet sent by the base station device, send the GTP-U uplink packet to the PGW through the SGW, and decapsulate the GTP-U uplink packet by using the PGW, and then The decapsulated GTP-U uplink packet is sent to the server, so that the server generates a response packet according to the decapsulated GTP-U uplink packet, and then sends the response packet to the PGW, so that the PGW sends the fifth message to the SGW.
  • the fifth GTP-U format packet contains the response packet.
  • the network interface 901 is further configured to: after sending the GTP-U uplink message to the PGW through the SGW, receive the sixth GTP-U format message sent by the SGW, where the sixth GTP-U format message is the SGW according to the SGW.
  • the packet is generated in the fifth GTP-U format, where the packet in the sixth GTP-U format includes the response packet and the TEID of the base station device.
  • the network interface 901 is configured to send a bearer context request message to the SGW or the service capability open platform after receiving the GTP-U uplink packet sent by the base station device, where the bearer context request message is used to query the SGW or the service capability open platform.
  • the network interface 901 is further configured to: after receiving the bearer context request message to the SGW or the service capability open platform, receive a bearer context response message sent by the SGW or the service capability open platform, where the bearer context response message includes the TEID of the base station device.
  • the TEID of the base station device is queried by the SGW or the service capability open platform according to the IP quintuple information.
  • the network interface 901 is specifically configured to receive the GTP-U uplink packet that is sent by the base station device and includes the TEID of the base station device.
  • the network interface 901 is further configured to: after sending the GTP-U downlink packet to the base station device, receive the GTP-U uplink packet sent by the base station device.
  • the network interface 901 is further configured to: after the processor 902 determines that the TEID of the base station device is stored, send the GTP-U downlink message to the base station device, where the GTP-U downlink message includes the TEID of the base station device.
  • the processor 902 is configured to acquire a TEID of the base station device according to the GTP-U uplink packet.
  • the processor 902 is further configured to receive, by the network interface 901, the sending by the base station device. After the GTP-U uplink packet, the first IP packet is generated according to the GTP-U uplink packet, and the first IP packet includes the IP address of the UE.
  • the processor 902 is configured to decapsulate the GTP-U uplink packet, and is specifically configured to generate the first IP packet according to the decapsulated GTP-U uplink packet.
  • the processor 902 is configured to obtain, after the network interface 901 receives the second GTP-U format packet sent by the SGW, the TEID of the base station device according to the second GTP-U format packet.
  • the processor 902 is further configured to: after the network interface 901 receives the GTP-U uplink packet sent by the base station device, generate a second IP packet according to the GTP-U uplink packet, where the second IP packet includes the UE IP address.
  • the processor 902 is configured to decapsulate the GTP-U uplink packet, and is specifically configured to generate a second IP packet according to the decapsulated GTP-U uplink packet.
  • the processor 902 is specifically configured to obtain, after the network interface 901 receives the fourth GTP-U format message sent by the SGW, the TEID of the base station device according to the fourth GTP-U format message.
  • the processor 902 is specifically configured to obtain, after the network interface 901 receives the packet in the sixth GTP-U format sent by the SGW, the TEID of the base station device according to the packet in the sixth GTP-U format.
  • the processor 902 is specifically configured to obtain, after the network interface 901 receives the bearer context response message sent by the SGW or the service capability open platform, the TEID of the base station device according to the bearer context response message.
  • the processor 902 is configured to obtain the TEID of the base station device included in the GTP-U uplink packet after the network interface 901 receives the GTP-U uplink packet that is sent by the base station device and includes the TEID of the base station device.
  • the processor 902 is further configured to: after the network interface 901 receives the GTP-U uplink packet sent by the base station device, generate a downlink data packet that needs to be sent to the UE according to the GTP-U uplink packet.
  • the processor 902 is further configured to decapsulate the GTP-U uplink packet, and is specifically configured to generate a downlink data packet according to the decapsulated GTP-U uplink packet.
  • the processor 902 is further configured to determine, according to the downlink data packet, that the TEID of the base station device is not stored, before acquiring the TEID of the base station device according to the GTP-U uplink packet.
  • the processor 902 is further configured to: after acquiring the TEID of the base station device according to the GTP-U uplink packet, storing the TEID of the base station device.
  • the processor 902 is further configured to: after the network interface 901 receives the GTP-U uplink message sent by the base station device, determine, according to the GTP-U uplink message, the TEID of the base station device.
  • the processor is configured to generate a downlink data packet according to the GTP-U uplink packet, and determine, according to the downlink data packet, a TEID in which the base station device is stored.
  • the network interface 901 is configured to perform a signal receiving process and a signal sending process of the MEC platform in the method shown in FIG. 2 to FIG. 8; the processor 902 is configured to execute the MEC platform in the method shown in FIG. 2 to FIG. Signal processing.
  • the apparatus 900 of this embodiment may further include a memory 903.
  • Memory 903 Used to store processor executable instructions. The instructions stored in the memory 903 may cause the processor 902 to perform the methods illustrated in Figures 2 through 8 above, such as:
  • the processor-executable instructions stored in the memory 903 are configured to: the processor 902: receive the GTP-U uplink message sent by the base station device; acquire the TEID of the base station device according to the GTP-U uplink message; and send the GTP-U to the base station device In the downlink packet, the GTP-U downlink packet contains the TEID of the base station device.
  • an embodiment of the present invention further provides a computer storage medium or a computer program product for storing processor executable instructions stored in the foregoing memory 903.
  • the foregoing memory may be a storage unit
  • the foregoing processor may be a processing unit.
  • the device in the embodiment can obtain the TEID of the base station device according to the GTP-U uplink packet, so that the GTP-U encapsulation can be correctly performed, and the GTP is sent to the base station device.
  • -U downlink message After receiving the GTP-U uplink packet sent by the base station device, the device in the embodiment can obtain the TEID of the base station device according to the GTP-U uplink packet, so that the GTP-U encapsulation can be correctly performed, and the GTP is sent to the base station device. -U downlink message.
  • the device in this embodiment can determine whether the TEID of the base station device is stored, and if not, store the base station together with the TEID of the base station device.
  • the TEID of the device if it is stored, can be directly encapsulated in GTP-U and sent to the base station device for GTP-U downlink packets.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种通用分组无线系统GPRS隧道协议用户面GTP-U下行报文的发送方法及装置。方法包括：移动边缘计算MEC平台接收基站设备发送的GTP-U上行报文；所述MEC平台根据所述GTP-U上行报文获取所述基站设备的隧道端点标识TEID；所述MEC平台向所述基站设备发送GTP-U下行报文，所述GTP-U下行报文中包含所述基站设备的TEID。采用本申请实施例中的技术方案可以在接收到基站设备发送的GTP-U上行报文后，根据GTP-U上行报文获取基站设备的TEID，从而正确的进行GTP-U封装，向基站设备发送GTP-U下行报文。

Description

一种GTP-U下行报文的发送方法及装置 技术领域
本发明涉及通信技术，尤其涉及一种通用分组无线系统(General Packet Radio System，简称GPRS)隧道协议用户面(GPRS Tunneling Protocol-User Plane，简称GTP-U)下行报文的发送方法及装置。
背景技术
为了应对无线宽带技术的挑战，保持第三代合作伙伴计划(The 3rd Generation Partnership Project，简称3GPP)网络的领先优势，3GPP制定了移动通信网络的长期演进(Long Term Evolution，简称LTE)计划，在此演进计划的指导下，定义了新的移动通信网络架构，即演进分组系统(Evolved Packet System，简称EPS)无线网络架构。
图1为现有技术中EPS无线网络架构的示意图。如图1所示，当用户设备(User Equipment，简称UE)通过GPRS业务支撑节点(Serving GPRS Support Node，简称SGSN)接入EPS网络时，UE可以通过S4接口接入到服务网关(Serving Gateway，简称SGW)，然后通过S5接口接入到分组数据网络网关(Packet Data Network Gateway，简称PDN-GW或PGW)。EPS网络中的主要网络实体的功能描述如下：
演进型通用陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，简称E-UTRAN)：由多个演进基站(eNodeB)组成的网络，实现无线物理层功能、资源调度和无线资源管理、无线接入控制以及移动性管理功能。eNodeB通过用户面接口(S1-U接口)和SGW连接，用于传送用户数据；通过控制面接口(S1-MME接口)和移动性管理实体(Mobility Management Entity，简称MME)连接，用于采用S1应用协议(S1Application Protocol，简称S1-AP)实现无线接入承载控制功能。
MME：主要负责UE的移动性管理、会话管理、非接入层(Non-Access Stratum，简称NAS)信令的加密和完整性保护、跟踪区列表(Tracking Area List)的管理、PGW/SGW的选择等功能。
SGW：主要负责UE的数据传输、转发以及路由切换等，并作为UE在eNodeB之间切换时的本地移动性锚定点。
PGW：外部网络向UE发送数据的入口，主要负责UE的IP地址分配、数据报文过滤、速率控制、生成计费信息等。
策略和计费规则功能(Policy and Charging Rules Function，简称PCRF)实体：该功能实体根据用户接入网络的限制、运营商策略、用户签约数据以及用户当前正在进行的业务信息等决定对应的策略，并将该策略提供给传输网关执行，从而实现策略计费控制。
运营商IP业务(Operator’s IP Services)：运营商IP业务在LTE网络中通过IP多媒体子系统(IP Multimedia Subsystem，简称IMS)网络实现。此外，包交换流业务(Packet Switched Streaming Service，简称PSS)技术是3GPP定义的一种向用户提供流媒体业务的技术，PSS网络架构中主要包括移动终端和网络侧的PSS服务器。
UE发送和接收的数据报文在EPS网络内通过EPS承载进行传输。为了描述的方便，下文中EPS承载也可以称为承载。每个UE可以具有多个承载，不同的承载能够满足不同业务的服务质量(Quality of Service，简称QoS)需求。eNodeB与SGW会存储每个承载的信息，即承载上下文。承载上下文中包含每个承载的SGW的隧道端点标识(Tunneling Endpoint Identifier，简称TEID)与eNodeB TEID，其中，SGW TEID用于eNodeB发往SGW的上行报文，eNodeB TEID用于SGW发往eNodeB的下行报文。eNodeB通过S1-AP消息与MME实现承载上下文的同步，SGW通过GPRS隧道协议控制面(GPRS Tunneling Protocol-Control Plane，简称GTP-C)消息与MME实现承载上下文的同步，从而实现eNodeB与SGW之间的承载上下文同步。
eNodeB在收到UE发来的上行报文时，会根据承载上下文将UE的上行报文封装成GTP-U报文，其中，GTP-U报文包含GTP-U头，GTP-U头包含SGW TEID。由于不同的承载会使用不同的SGW TEID，因此，SGW收到eNodeB发来的GTP-U报文时，根据GTP-U头即可判断该GTP-U报文所属的承载。同样的，SGW收到发往UE的下行报文时，将UE的报文封装成GTP-U报文，其中，GTP-U报文包含GTP-U头，GTP-U头包含eNodeB TEID，因此，eNodeB收到SGW发来的GTP-U报文时，根据GTP-U头即可判断该 GTP-U报文所属的承载。
移动边缘计算(Mobile Edge Computing，简称MEC)平台是一个部署于S1-U接口上的逻辑网元，位于eNodeB和SGW之间。MEC平台主要由数据总线(traffic bus)和应用(application)组成，其中数据总线负责获取UE的数据报文并转发给相应应用，应用处理完数据报文后将处理完的数据报文发送给数据总线进行路由。
MEC平台上可以安装多种应用，用于增强用户的业务体验。MEC平台上的应用可以截获UE发送的上行报文，并对UE的上行报文进行修改、检测、转发等，也可以对UE发来的上行报文直接给出应答。例如MEC平台可以安装视频缓存应用，当UE发来视频请求报文时，UE的视频请求报文会被视频缓存应用处理，如果视频缓存应用中没有UE所请求的视频，视频缓存应用会转发用户的视频请求报文给SGW；如果视频缓存应用中存储有UE所请求的视频，则视频缓存应用会直接发送视频应答报文给UE。
申请人发现：在MEC平台对UE的上行报文直接给出应答的情况下，MEC平台无法正确的进行GTP-U封装，从而无法向eNodeB发送对应于UE的上行报文的应答报文。
发明内容
本发明实施例提供一种GTP-U下行报文的发送方法及装置，用于解决MEC平台对UE的上行报文直接给出应答的情况下，无法正确的进行GTP-U封装，从而无法向eNodeB发送对应于UE的上行报文的应答报文的问题。
第一方面提供一种GTP-U下行报文的发送方法，包括：
移动边缘计算MEC平台接收基站设备发送的GTP-U上行报文；
所述MEC平台根据所述GTP-U上行报文获取所述基站设备的隧道端点标识TEID；
所述MEC平台向所述基站设备发送GTP-U下行报文，所述GTP-U下行报文中包含所述基站设备的TEID。
第二方面提供一种GTP-U下行报文的发送装置，包括：网络接口和处理器，
所述网络接口，用于接收基站设备发送的GTP-U上行报文；
所述处理器，用于根据所述GTP-U上行报文获取所述基站设备的隧 道端点标识TEID；
所述网络接口，还用于向所述基站设备发送GTP-U下行报文，所述GTP-U下行报文中包含所述基站设备的TEID。
本发明实施例中，MEC平台在接收到基站设备发送的GTP-U上行报文后，能够根据GTP-U上行报文获取基站设备的TEID，从而能够正确的进行GTP-U封装，向基站设备发送GTP-U下行报文。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为为现有技术中EPS无线网络架构的示意图；
图2为本发明第一实施例提供的GTP-U下行报文的发送方法的流程图；
图3为本发明第二实施例提供的GTP-U下行报文的发送方法的示意图；
图4为本发明第三实施例提供的GTP-U下行报文的发送方法的示意图；
图5为本发明第四实施例提供的GTP-U下行报文的发送方法的示意图；
图6为本发明第五实施例提供的GTP-U下行报文的发送方法的示意图；
图7为本发明第六实施例提供的GTP-U下行报文的发送方法的示意图；
图8本发明第七实施例提供的GTP-U下行报文的发送方法的示意图；
图9为本发明第八实施例提供的GTP-U下行报文的发送装置的示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例中涉及的通信系统可以是第二代(The Second Generation，简称2G)移动通信系统，例如：全球移动通信系统(Global System for Mobile  Communications，简称GSM)，或者第三代(The Third Generation，简称3G)移动通信系统，例如：通用移动通讯系统(Universal Mobile Telecommunications System，简称UMTS)，或者第四代(The Fourth Generation，简称4G)移动通信系统，例如：长期演进(Long Term Evolution，简称LTE)系统。可选的，本发明实施例中涉及的通信系统还可以是新一代的移动通信系统，例如第五代(The Fifth Generation，简称5G)移动通信系统。
本发明实施例中涉及的UE可以是无线终端，无线终端可以是指向用户提供语音或数据连通性的设备，具有无线连接功能的手持式设备，或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(例如，Radio Access Network，简称RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)，也可以是具有移动终端的计算机，例如，便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语音或数据。例如，无线终端可以是个人通信业务(Personal Communication Service，简称PCS)电话、无绳电话、会话发起协议(Session Initiation Protocol，简称SIP)话机、无线本地环路(Wireless Local Loop，简称WLL)站、个人数字助理(Personal Digital Assistant，简称PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point，简称AP)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)。
本发明实施例中涉及的基站设备，可以是GSM系统中的基站收发信台(Base Transceiver Station，简称BTS)；也可以是UMTS系统中的NodeB；还可以是LTE系统中的演进基站(eNodeB)。应当理解的是，本发明实施例中的基站设备既包括已有通信系统中的基站设备，也包括未来可能出现的通信系统中的基站设备，本发明实施例并不限定。
图2为本发明第一实施例提供的GTP-U下行报文的发送方法的流程图。如图2所示，本实施例的方法包括：
201、移动边缘计算MEC平台接收基站设备发送的GTP-U上行报文。
可选的，GTP-U上行报文中包含UE发送的上行数据报文和UE的承载上下文。其中，上行数据报文中包含UE的互联网协议IP地址。例如，上行数据报文具有IP头，IP头中的源地址为UE的IP地址。
可选的，MEC平台包括数据总线，数据总线接收基站设备发送的GTP-U上行报文。
可选的，MEC平台接收基站设备发送的GTP-U上行报文后，MEC平台还根据GTP-U上行报文生成需要发送给UE的下行数据报文。
可选的，MEC平台还包括应用，应用根据GTP-U上行报文生成下行数据报文。
可选的，数据总线将GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给应用；应用根据解封装的GTP-U上行报文生成下行数据报文。
202、MEC平台根据GTP-U上行报文获取基站设备的TEID。
可选的，MEC平台可以根据GTP-U上行报文，通过以下几种方式之一获取基站设备的TEID：
第一种方式：
MEC平台根据GTP-U上行报文生成第一IP报文，第一IP报文中包含UE的IP地址。可选的，第一IP报文的IP头中的目的地址为UE的IP地址。可选的，应用根据GTP-U上行报文生成第一IP报文。可选的，数据总线将GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给应用，应用根据解封装的GTP-U上行报文生成第一IP报文。其中，第一IP报文可以是需要发送给UE的下行数据报文，也可以是负载为空的报文，还可以是包含MEC平台标识的报文。
MEC平台向IP网络发送第一IP报文，其中，第一IP报文发送至IP网络后基于UE的IP地址被路由至分组数据网关PGW，以使得PGW向服务网关SGW发送第一GTP-U格式的报文，第一GTP-U格式的报文中包含第一IP报文。可选的，数据总线向IP网络发送第一IP报文。可选的，第一IP报文中还包含UE的承载上下文，当第一IP报文被路由至PGW后，PGW根据UE的承载上下文将第一IP报文封装成第一GTP-U格式的报文。其中，第一GTP-U格式的报文中包含SGW TEID，SGW TEID用于PGW向SGW发送第一GTP-U格式的报文。
MEC平台接收SGW发送的第二GTP-U格式的报文，第二GTP-U格式的报文为SGW根据第一GTP-U格式的报文生成的，其中，第二GTP-U格式的报文中包含第一IP报文和基站设备的TEID。可选的，数据总线接收SGW发送的第二GTP-U格式的报文。可选的，SGW接收PGW发送的第一GTP-U格式的报文后，将第一GTP-U格式的报文解封装，移除SGW TEID，从而获取第一IP报文。SGW根据第一IP报文生成第二GTP-U格式的报文。可选的，SGW根据第一IP报文中的UE的承载上下文将第一IP报文封装成第二GTP-U格式的报文，其中，第二GTP-U格式的报文的GTP-U头中包含该承载的基站设备的TEID。
MEC平台根据第二GTP-U格式的报文获取基站设备的TEID。可选的，数据总线根据第二GTP-U格式的报文获取基站设备的TEID。
这种方式不需要对MEC平台以外的其他设备进行升级，也不要求部署服务器设备，与现有设备兼容，因此部署速度较快，成本较低。
第二种方式：
MEC平台根据GTP-U上行报文生成第二IP报文，第二IP报文中包含UE的IP地址。例如，第二IP报文的IP头中的目的地址为UE的IP地址。可选的，应用根据GTP-U上行报文生成第二IP报文。可选的，数据总线将GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给应用，应用根据解封装的GTP-U上行报文生成第二IP报文。其中，第二IP报文可以是负载为空的报文，也可以是包含MEC平台标识的报文。
MEC平台通过SGW和PGW向服务器发送第二IP报文，以使得服务器根据第二IP报文生成响应的报文后，将响应的报文发送给PGW，从而使得PGW向SGW发送第三GTP-U格式的报文，第三GTP-U格式的报文中包含响应的报文。可选的，数据总线通过SGW和PGW向服务器发送第二IP报文。可选的，响应的报文中包含UE的承载上下文，PGW接收响应的报文后，PGW根据UE的承载上下文将响应的报文封装成第三GTP-U格式的报文。其中，第三GTP-U格式的报文中包含SGW TEID，SGW TEID用于PGW向SGW发送第三GTP-U格式的报文。
MEC平台接收SGW发送的第四GTP-U格式的报文，第四GTP-U格式的报文为SGW根据第三GTP-U格式的报文生成的，其中，第四GTP-U格式 的报文中包含响应的报文和基站设备的TEID。可选的，数据总线接收SGW发送的第四GTP-U格式的报文。可选的，SGW接收PGW发送的第三GTP-U格式的报文后，将第三GTP-U格式的报文解封装，移除SGW TEID，从而获取响应的报文。SGW根据响应的报文生成第四GTP-U格式的报文。可选的，SGW根据响应的报文中的UE的承载上下文将响应的报文封装成第四GTP-U格式的报文，其中，第四GTP-U格式的报文的GTP-U头中包含该承载的基站设备的TEID。
MEC平台根据第四GTP-U格式的报文获取基站设备的TEID。可选的，数据总线根据第四GTP-U格式的报文获取基站设备的TEID。
第三种方式：
MEC平台通过SGW向PGW发送GTP-U上行报文，并通过PGW将GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给服务器，以使得服务器根据解封装的GTP-U上行报文生成响应的报文后，将响应的报文发送给PGW，从而使得PGW向SGW发送第五GTP-U格式的报文，第五GTP-U格式的报文中包含响应的报文。可选的，数据总线通过SGW向PGW发送GTP-U上行报文。可选的，PGW将GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给服务器。对应的，服务器接收解封装的GTP-U上行报文，并根据解封装的GTP-U上行报文生成响应的报文。可选的，响应的报文中包含UE的承载上下文，PGW接收响应的报文后，PGW根据UE的承载上下文将响应的报文封装成第五GTP-U格式的报文。其中，第五GTP-U格式的报文中包含SGW TEID，SGW TEID用于PGW向SGW发送第五GTP-U格式的报文。
MEC平台接收SGW发送的第六GTP-U格式的报文，第六GTP-U格式的报文为SGW根据第五GTP-U格式的报文生成的，其中，第六GTP-U格式的报文中包含响应的报文和基站设备的TEID。可选的，数据总线接收SGW发送的第六GTP-U格式的报文。可选的，SGW根据第五GTP-U格式的报文生成第六GTP-U格式的报文的过程，与第二种方式SGW根据第三GTP-U格式的报文生成第四GTP-U格式的报文的过程相似，参见第二方式中的详细描述，在此不再赘述。
MEC平台根据第六GTP-U格式的报文获取基站设备的TEID。可选的， 数据总线根据第六GTP-U格式的报文获取基站设备的TEID。
第四种方式：
MEC平台向SGW或服务能力开放平台发送承载上下文请求消息，承载上下文请求消息用于向SGW或服务能力开放平台查询基站设备的TEID，其中，承载上下文请求消息中包含IP五元组信息，IP五元组信息中的目的地址为UE的IP地址。可选的，数据总线向SGW或服务能力开放平台发送承载上下文请求消息。可选的，MEC平台可以根据GTP-U协议向PGW发送IP五元组信息，以查询SGW TEID，从而根据SGW TEID向SGW发送承载上下文请求消息；或者，MEC平台可以根据PMIP协议向SGW发送承载上下文请求消息。可选的，SGW或服务能力平台接收MEC平台发送的承载上下文请求消息后，根据IP五元组信息查询基站设备的TEID。
MEC平台接收SGW或服务能力开放平台发送的承载上下文响应消息，承载上下文响应消息中包含基站设备的TEID，基站设备的TEID为SGW或服务能力开放平台根据IP五元组信息查询的。可选的，数据总线接收SGW或服务能力开放平台发送的承载上下文响应消息。
MEC平台根据承载上下文响应消息获取基站设备的TEID。可选的，数据总线根据承载上下文响应消息获取基站设备的TEID。
这种方式中涉及到的服务能力开放平台为3GPP定义的一个功能实体，该平台可以收集3GPP网络内各个网元的信息，例如设备信息、用户上下文信息等。当其他实体需要获取3GPP网络内各个网元的信息时，可以通过应用平台接口(Application Platform Interface，简称API)从服务能力开放平台获取。服务能力开放平台在3GPP定义的标准中对应于Service Capability Exposure Function，可以简称为SCEF。
这种方式不要求额外部署服务器设备，因此实现起来较为简单，开销较低，维护成本较低。
第五种方式：
GTP-U上行报文中包含基站设备的TEID，MEC平台获取GTP-U上行报文中包含的基站设备的TEID。可选的，数据总线获取GTP-U上行报文中包含的基站设备的TEID。
可选的，GTP-U下行报文中包含需要发送给UE的下行数据报文，MEC 平台根据GTP-U上行报文获取基站设备的TEID之前，MEC平台还根据下行数据报文确定未存储基站设备的TEID。可选的，数据总线还根据下行数据报文确定未存储基站设备的TEID。
可选的，MEC平台根据GTP-U上行报文获取基站设备的TEID之后，MEC平台还存储基站设备的TEID。可选的，数据总线还存储基站设备的TEID。
203、MEC平台向基站设备发送GTP-U下行报文，GTP-U下行报文中包含基站设备的TEID。
可选的，数据总线向基站设备发送GTP-U下行报文。
可选的，GTP-U下行报文中还包括需要发送给UE的下行数据报文。
可选的，MEC平台向基站设备发送GTP-U下行报文之后，MEC平台还接收基站设备发送的GTP-U上行报文；根据GTP-U上行报文确定存储有基站设备的TEID；以及向基站设备发送GTP-U下行报文，GTP-U下行报文中包含基站设备的TEID。可选的，MEC平台根据GTP-U上行报文生成下行数据报文，并根据下行数据报文确定存储有基站设备的TEID。
本实施例中，MEC平台在接收到基站设备发送的GTP-U上行报文后，能够根据GTP-U上行报文获取基站设备的TEID，从而能够正确的进行GTP-U封装，向基站设备发送GTP-U下行报文。
进一步的，MEC平台在接收到基站设备发送的GTP-U上行报文后，能够判断是否存储有基站设备的TEID，若未存储，则在获取基站设备的TEID后一并存储基站设备的TEID，若已存储，则可以直接进行GTP-U封装，向基站设备发送GTP-U下行报文。
下面以LTE系统为应用场景，基站设备为eNodeB，进行举例说明。在后续各实施例中，为了描述的方便，基站设备的TEID可以称为eNodeB TEID。
图3为本发明第二实施例提供的GTP-U下行报文的发送方法的示意图。本实施例中，与第一实施例相似的内容可以参考第一实施例中的详细描述，在此不再赘述。如图3所示，本实施例的方法包括：
301、eNodeB向MEC平台发送GTP-U上行报文。
可选的，GTP-U上行报文中包含UE发送的上行数据报文，该上行数 据报文中包含UE的IP地址。
302、MEC平台接收eNodeB发送的GTP-U上行报文。MEC平台根据GTP-U上行报文确定未存储eNodeB TEID后，生成第一IP报文，第一IP报文中包含UE的IP地址。
可选的，MEC平台根据GTP-U上行报文生成需要发送给UE的下行数据报文，并根据下行数据报文确定未存储eNodeB TEID。
303、MEC平台向IP网络发送第一IP报文。
304、第一IP报文发送至IP网络后基于UE的IP地址被路由PGW。
305、PGW接收到第一IP报文后，根据第一IP报文生成第一GTP-U格式的报文，并向SGW发送第一GTP-U格式的报文。
可选的，第一IP报文中包含UE的承载上下文，PGW根据UE的承载上下文将第一IP报文封装成第一GTP-U格式的报文，第一GTP-U格式的报文中包含SGW TEID。
306、SGW接收PGW发送的第一GTP-U格式的报文，并根据第一GTP-U格式的报文生成第二GTP-U格式的报文，向MEC平台发送第二GTP-U格式的报文。
可选的，SGW将第一GTP-U格式的报文解封装，移除SGW TEID，从而获取第一IP报文，然后根据UE的承载上下文将第一IP报文封装成第二GTP-U格式的报文，第二GTP-U格式的报文中包含eNodeB TEID。
307、MEC平台接收SGW发送的第二GTP-U格式的报文，并根据第二GTP-U格式的报文获取并存储eNodeB TEID。
308、MEC平台向eNodeB发送GTP-U下行报文，GTP-U下行报文中包含eNodeB TEID。
可选的，MEC平台将需要发送给UE的下行数据报文封装成GTP-U下行报文。
309、MEC平台接收eNodeB发送的GTP-U上行报文。
310、MEC平台根据GTP-U上行报文确定存储有eNodeB TEID。
可选的，MEC平台根据GTP-U上行报文生成需要发送给UE的下行数据报文，并根据下行数据报文确定存储有eNodeB TEID。
311、MEC平台向eNodeB发送GTP-U下行报文，GTP-U下行报文中包 含eNodeB TEID。
本实施例中，MEC平台在接收基站设备发送的GTP-U上行报文后，根据GTP-U上行报文生成第一IP报文，通过向IP网络发送第一IP报文后，接收SGW发送的包含基站设备的TEID的GTP-U格式的报文，从而在获取基站设备的TEID后向基站设备发送正确封装的GTP-U下行报文。
进一步的，本实施例的方法不需要对MEC平台以外的其他设备进行升级，也不要求部署服务器设备，与现有设备兼容，因此部署速度较快，成本较低。
图4为本发明第三实施例提供的GTP-U下行报文的发送方法的示意图。本实施例中，与第一实施例相似的内容可以参考第一实施例中的详细描述，在此不再赘述。
本实施例中，步骤401、步骤402与第二实施例中的步骤301、步骤302相似，其中，步骤402中的第二IP报文对应步骤302中的第一IP报文，其他内容不再赘述。
403～405、MEC平台通过SGW和PGW向服务器发送第二IP报文。
406、服务器根据第二IP报文生成响应的报文后，向PGW发送响应的报文，其中，响应的报文中包含UE的IP地址。
407、PGW接收服务器发送的响应的报文，并根据响应的报文生成第三GTP-U格式的报文后，向SGW发送第三GTP-U格式的报文。
可选的，响应的报文中包含UE的承载上下文，PGW根据UE的承载上下文将响应的报文封装成第三GTP-U格式的报文，第三GTP-U格式的报文中包含SGW TEID。
408、SGW接收PGW发送的第三GTP-U格式的报文，并根据第三GTP-U格式的报文生成第四GTP-U格式的报文，向MEC平台发送第四GTP-U格式的报文。
可选的，SGW将第三GTP-U格式的报文解封装，移除SGW TEID，从而获取响应的报文，然后根据UE的承载上下文将响应的报文封装成第四GTP-U格式的报文，第四GTP-U格式的报文中包含eNodeB TEID。
409、MEC平台接收SGW发送的第四GTP-U格式的报文，并根据第四GTP-U格式的报文获取并存储eNodeB TEID。
步骤410～步骤413与第二实施例中的步骤308～步骤311相似，在此不再赘述。
图5为本发明第四实施例提供的GTP-U下行报文的发送方法的示意图。本实施例中，与第一实施例相似的内容可以参考第一实施例中的详细描述，在此不再赘述。
本实施例中，步骤501与第三实施例中的步骤401相似，在此不再赘述。
502、MEC平台接收eNodeB发送的GTP-U上行报文后，根据GTP-U上行报文确定未存储eNodeB TEID。
可选的，MEC平台根据GTP-U上行报文生成需要发送给UE的下行数据报文，并根据下行数据报文确定未存储eNodeB TEID。
503～504、MEC平台通过SGW向PGW发送GTP-U上行报文。
505、PGW接收GTP-U上行报文后，将GTP-U上行报文解封装后，向服务器发送解封装的GTP-U上行报文。
步骤506～步骤513与第三实施例中的步骤406～413相似，其中，区别在于，步骤406中的响应的报文为服务器根据第二IP报文生成的响应的报文，而步骤506中的响应的报文为服务器根据解封装的GTP-U上行报文生成的响应的报文；本实施例中的第五、第六GTP-U格式的报文分别与第三实施例中第三、第四GTP-U格式的报文相似其他内容不再赘述。
图6为本发明第五实施例提供的GTP-U下行报文的发送方法的示意图。本实施例中，与第一实施例相似的内容可以参考第一实施例中的详细描述，在此不再赘述。
本实施例中，步骤601、步骤602与第四实施例中的步骤501、步骤502相似，在此不再赘述。
603、MEC平台向SGW或服务能力开放平台发送承载上下文请求消息，承载上下文请求消息用于向SGW或服务能力开放平台查询基站设备的TEID，其中，承载上下文请求消息中包含IP五元组信息，IP五元组信息中的目的地址为UE的IP地址。
604、SGW或服务能力开放平台接收SGW发送的承载上下文请求消息后，根据IP五元组信息查询eNodeB TEID。SGW或服务能力开放平台 向MEC平台发送承载上下文响应消息，承载上下文响应消息中包含eNodeB TEID。
步骤605～步骤609与第四实施例中的步骤509～步骤513相似，在此不再赘述。
本实施例中，MEC平台通过向SGW或服务能力开放平台发送包含IP五元组信息的承载上下文请求消息，从而获取SGW或服务能力开放平台根据IP五元组信息查询的基站设备的TEID，以向基站设备发送正确封装的GTP-U下行报文。
进一步的，本实施例的方法不需要部署额外的服务器设备等，实现较为简单，开销较低，维护成本低。
图7为本发明第六实施例提供的GTP-U下行报文的发送方法的示意图。本实施例中，与第一实施例相似的内容可以参考第一实施例中的详细描述，在此不再赘述。本实施例的方法包括：
701、eNodeB向MEC平台发送GTP-U上行报文，GTP-U上行报文中包含eNodeB TEID。
702、MEC平台根据GTP-U上行报文确定未存储eNodeB TEID后，获取并存储eNodeB TEID。
可选的，MEC平台根据GTP-U上行报文生成需要发送给UE的下行数据报文，并根据下行数据报文确定未存储eNodeB TEID。
步骤703～步骤706与第五实施例中的步骤606～步骤609相似，在此不再赘述。
图8为本发明第七实施例提供的GTP-U下行报文的发送方法的示意图。本实施例在第二实施例的基础上，以MEC平台包括数据总线和应用为例，进行说明。本实施例中，与第一、第二实施例相似的内容可以参考第一、第二实施例中的详细描述，在此不再赘述。
本实施例中，步骤801、步骤805～步骤813与第二实施例中步骤301、步骤303～步骤311相似，其中，步骤801、步骤805～步骤813中的数据总线对应步骤301、步骤303～步骤311中的MEC平台，其他内容不再赘述。
第二实施例中步骤302对应于本实施例中以下三个步骤：
802、数据总线接收GTP-U上行报文后，将GTP-U上行报文解封装， 并将解封装的GTP-U上行报文发送给应用。
803、应用根据解封装的GTP-U上行报文生成第一IP报文，并将第一IP报文发送给数据总线。
804、数据总线接收应用发送的第一IP报文，并根据第一IP报文确定未存储eNodeB TEID。
类似的，在第三至第六实施例的基础上，MEC平台也可以包括数据总线和应用，其中，第三至第六实施例中的步骤402、步骤502、步骤602、步骤702分别可以对应于与第七实施例中步骤802～步骤804类似的数据总线与应用交互的三个步骤，第三至第六实施例的其他步骤中涉及MEC平台的步骤由数据总线完成，其他内容不再赘述。
图9为本发明第八实施例提供的GTP-U下行报文的发送装置的示意图。本实施例中，与第一至第七实施例对应的内容可以参考第一至第七实施例中的详细描述，在此不再赘述。本实施例中，GTP-U下行报文的发送装置900包括：网络接口901和处理器902。
网络接口901，用于接收基站设备发送的GTP-U上行报文，以及用于向基站设备发送GTP-U下行报文，GTP-U下行报文中包含基站设备的TEID。
可选的，网络接口901用于在处理器902生成第一IP报文后，向IP网络发送第一IP报文，其中，第一IP报文发送至IP网络后基于UE的IP地址被路由至分组数据网关PGW，以使得PGW向服务网关SGW发送第一GTP-U格式的报文，第一GTP-U格式的报文中包含第一IP报文。
可选的，网络接口901还用于在向IP网络发送第一IP报文后，接收SGW发送的第二GTP-U格式的报文，第二GTP-U格式的报文为SGW根据第一GTP-U格式的报文生成的，其中，第二GTP-U格式的报文中包含第一IP报文和基站设备的TEID。
可选的，网络接口901用于在处理器902生成第二IP报文后，通过SGW和PGW向服务器发送第二IP报文，以使得服务器根据第二IP报文生成响应的报文后，将响应的报文发送给PGW，从而使得PGW向SGW发送第三GTP-U格式的报文，第三GTP-U格式的报文中包含响应的报文。
可选的，网络接口901还用于在通过SGW和PGW向服务器发送第二IP 报文后，接收SGW发送的第四GTP-U格式的报文，第四GTP-U格式的报文为SGW根据第三GTP-U格式的报文生成的，其中，第四GTP-U格式的报文中包含响应的报文和基站设备的TEID。
可选的，网络接口901用于在接收基站设备发送的GTP-U上行报文后，通过SGW向PGW发送GTP-U上行报文，并通过PGW将GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给服务器，以使得服务器根据解封装的GTP-U上行报文生成响应的报文后，将响应的报文发送给PGW，从而使得PGW向SGW发送第五GTP-U格式的报文，第五GTP-U格式的报文中包含响应的报文。
可选的，网络接口901还用于在通过SGW向PGW发送GTP-U上行报文后，接收SGW发送的第六GTP-U格式的报文，第六GTP-U格式的报文为SGW根据第五GTP-U格式的报文生成的，其中，第六GTP-U格式的报文中包含响应的报文和基站设备的TEID。
可选的，网络接口901用于在接收基站设备发送的GTP-U上行报文后，向SGW或服务能力开放平台发送承载上下文请求消息，承载上下文请求消息用于向SGW或服务能力开放平台查询基站设备的TEID，其中，承载上下文请求消息中包含IP五元组信息，IP五元组信息中的目的地址为UE的IP地址。
可选的，网络接口901还用于在向SGW或服务能力开放平台发送承载上下文请求消息后，接收SGW或服务能力开放平台发送的承载上下文响应消息，承载上下文响应消息中包含基站设备的TEID，基站设备的TEID为SGW或服务能力开放平台根据IP五元组信息查询的。
可选的，网络接口901具体用于接收基站设备发送的包含基站设备的TEID的GTP-U上行报文。
可选的，网络接口901还用于在向基站设备发送GTP-U下行报文后，接收基站设备发送的GTP-U上行报文。
可选的，网络接口901还用于在处理器902确定存储有基站设备的TEID后，向基站设备发送GTP-U下行报文，GTP-U下行报文中包含基站设备的TEID。
处理器902，用于根据GTP-U上行报文获取基站设备的TEID。
可选的，处理器902还用于在网络接口901接收基站设备发送的 GTP-U上行报文后，根据GTP-U上行报文生成第一IP报文，第一IP报文中包含UE的IP地址。可选的，处理器902用于将GTP-U上行报文解封装，以及具体用于根据解封装的GTP-U上行报文生成第一IP报文。
可选的，处理器902具体用于在网络接口901接收SGW发送的第二GTP-U格式的报文后，根据第二GTP-U格式的报文获取基站设备的TEID。
可选的，处理器902还用于在网络接口901接收基站设备发送的GTP-U上行报文后，根据GTP-U上行报文生成第二IP报文，第二IP报文中包含UE的IP地址。可选的，处理器902用于将GTP-U上行报文解封装，以及具体用于根据解封装的GTP-U上行报文生成第二IP报文。
可选的，处理器902具体用于在网络接口901接收SGW发送的第四GTP-U格式的报文后，根据第四GTP-U格式的报文获取基站设备的TEID。
可选的，处理器902具体用于在网络接口901接收SGW发送的第六GTP-U格式的报文后，根据第六GTP-U格式的报文获取基站设备的TEID。
可选的，处理器902具体用于在网络接口901接收SGW或服务能力开放平台发送的承载上下文响应消息后，根据承载上下文响应消息获取基站设备的TEID。
可选的，处理器902具体用于在网络接口901接收基站设备发送的包含基站设备的TEID的GTP-U上行报文后，获取GTP-U上行报文中包含的基站设备的TEID。
可选的，处理器902还用于在网络接口901接收基站设备发送的GTP-U上行报文后，根据GTP-U上行报文生成需要发送给UE的下行数据报文。可选的，处理器902还用于将GTP-U上行报文解封装，以及具体用于根据解封装的GTP-U上行报文生成下行数据报文。
可选的，处理器902还用于在根据GTP-U上行报文获取基站设备的TEID之前，根据下行数据报文确定未存储基站设备的TEID。
可选的，处理器902还用于在根据GTP-U上行报文获取基站设备的TEID后，存储基站设备的TEID。
可选的，处理器902还用于在网络接口901接收基站设备发送的GTP-U上行报文后，根据GTP-U上行报文确定存储有基站设备的TEID。可选的，处理器具体用于根据GTP-U上行报文生成下行数据报文，并根据下行数据报文确定存储有基站设备的TEID。
可选的，网络接口901用于执行图2至图8所示方法中的MEC平台的信号接收过程和信号发送过程；处理器902用于执行图2至图8所示方法中的MEC平台的信号处理过程。
进一步的，本实施例的装置900还可以包括存储器903。存储器903 用于存储处理器可执行指令。存储器903中存储的指令可以使得处理器902执行上述图2至图8所示方法，例如：
存储器903中存储的处理器可执行指令使得处理器902进行如下操作：接收基站设备发送的GTP-U上行报文；根据GTP-U上行报文获取基站设备的TEID；向基站设备发送GTP-U下行报文，GTP-U下行报文中包含基站设备的TEID。
可选的，本发明的实施例还提供一种计算机存储介质或者计算机程序产品，用于存储上述存储器903中存储的处理器可执行指令。
可选的，上述存储器可以为存储单元，上述处理器可以为处理单元。
本实施例中的装置在接收到基站设备发送的GTP-U上行报文后，能够根据GTP-U上行报文获取基站设备的TEID，从而能够正确的进行GTP-U封装，向基站设备发送GTP-U下行报文。
进一步的，本实施例中的装置在接收到基站设备发送的GTP-U上行报文后，能够判断是否存储有基站设备的TEID，若未存储，则在获取基站设备的TEID后一并存储基站设备的TEID，若已存储，则可以直接进行GTP-U封装，向基站设备发送GTP-U下行报文。
本领域普通技术人员可以理解：实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (24)

  1. 一种通用分组无线系统GPRS隧道协议用户面GTP-U下行报文的发送方法，其特征在于，包括：
    移动边缘计算MEC平台接收基站设备发送的GTP-U上行报文；
    所述MEC平台根据所述GTP-U上行报文获取所述基站设备的隧道端点标识TEID；
    所述MEC平台向所述基站设备发送GTP-U下行报文，所述GTP-U下行报文中包含所述基站设备的TEID。
  2. 根据权利要求1所述的方法，其特征在于，所述GTP-U上行报文中包含用户设备的互联网协议IP地址，所述MEC平台根据所述GTP-U上行报文获取所述基站设备的TEID，包括：
    所述MEC平台根据所述GTP-U上行报文生成第一IP报文，所述第一IP报文中包含所述用户设备的IP地址；
    所述MEC平台向IP网络发送所述第一IP报文，其中，所述第一IP报文发送至所述IP网络后基于所述用户设备的IP地址被路由至分组数据网络网关PGW，以使得所述PGW向服务网关SGW发送第一GTP-U格式的报文，所述第一GTP-U格式的报文中包含所述第一IP报文；
    所述MEC平台接收所述SGW发送的第二GTP-U格式的报文，所述第二GTP-U格式的报文为所述SGW根据所述第一GTP-U格式的报文生成的，其中，所述第二GTP-U格式的报文中包含所述第一IP报文和所述基站设备的TEID；
    所述MEC平台根据所述第二GTP-U格式的报文获取所述基站设备的TEID。
  3. 根据权利要求2所述的方法，其特征在于，所述MEC平台包括应用，
    所述MEC平台根据所述GTP-U上行报文生成第一IP报文，包括：
    所述应用根据所述GTP-U上行报文生成所述第一IP报文。
  4. 根据权利要求3所述的方法，其特征在于，所述MEC平台还包括数据总线，
    所述MEC平台根据所述GTP-U上行报文生成第一IP报文，包括：
    所述数据总线将所述GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给所述应用；
    所述应用根据所述解封装的GTP-U上行报文生成所述第一IP报文；
    所述MEC平台向IP网络发送所述第一IP报文，包括：
    所述数据总线向所述IP网络发送所述第一IP报文；
    所述MEC平台接收所述SGW发送的第二GTP-U格式的报文，包括：
    所述数据总线接收所述SGW发送的所述第二GTP-U格式的报文；
    所述MEC平台根据所述第二GTP-U格式的报文获取所述基站设备的TEID，包括：
    所述数据总线根据所述第二GTP-U格式的报文获取所述基站设备的TEID。
  5. 根据权利要求2至4中任一项所述的方法，其特征在于，所述第一IP报文为所述MEC平台需要发送给所述用户设备的下行数据报文，或者所述第一IP报文为负载为空的报文，或者所述第一IP报文为包含MEC平台标识的报文。
  6. 根据权利要求1所述的方法，其特征在于，所述GTP-U上行报文中包含用户设备的IP地址，所述MEC平台根据所述GTP-U上行报文获取所述基站设备的TEID，包括：
    所述MEC平台根据所述GTP-U上行报文生成第二IP报文，所述第二IP报文中包含所述用户设备的IP地址；
    所述MEC平台通过SGW和PGW向服务器发送所述第二IP报文，以使得所述服务器根据所述第二IP报文生成响应的报文后，将所述响应的报文发送给所述PGW，从而使得所述PGW向所述SGW发送第三GTP-U格式的报文，所述第三GTP-U格式的报文中包含所述响应的报文；
    所述MEC平台接收所述SGW发送的第四GTP-U格式的报文，所述第四GTP-U格式的报文为所述SGW根据所述第三GTP-U格式的报文生成的，其中，所述第四GTP-U格式的报文中包含所述响应的报文和所述基站设备的TEID；
    所述MEC平台根据所述第四GTP-U格式的报文获取所述基站设备的TEID。
  7. 根据权利要求1所述的方法，其特征在于，所述MEC平台根据所述GTP-U上行报文获取所述基站设备的TEID，包括：
    所述MEC平台通过SGW向PGW发送所述GTP-U上行报文，并通过所述PGW将所述GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给服务器，以使得所述服务器根据所述解封装的GTP-U上行报文生成响应的报文后，将所述响应的报文发送给所述PGW，从而使得所述PGW向所述SGW发送第五GTP-U格式的报文，所述第五GTP-U格式的报文中包含所述响应的报文；
    所述MEC平台接收所述SGW发送的第六GTP-U格式的报文，所述第六GTP-U格式的报文为所述SGW根据所述第五GTP-U格式的报文生 成的，其中，所述第六GTP-U格式的报文中包含所述响应的报文和所述基站设备的TEID；
    所述MEC平台根据所述第六GTP-U格式的报文获取所述基站设备的TEID。
  8. 根据权利要求1所述的方法，其特征在于，所述GTP-U上行报文中包含用户设备的IP地址，所述MEC平台根据所述GTP-U上行报文获取所述基站设备的TEID，包括：
    所述MEC平台向SGW或服务能力开放平台发送承载上下文请求消息，所述承载上下文请求消息用于向所述SGW或所述服务能力开放平台查询所述基站设备的TEID，其中，所述承载上下文请求消息中包含IP五元组信息，所述IP五元组信息中的目的地址为所述用户设备的IP地址；
    所述MEC平台接收所述SGW或所述服务能力开放平台发送的承载上下文响应消息，所述承载上下文响应消息中包含所述基站设备的TEID，所述基站设备的TEID为所述SGW或所述服务能力开放平台根据所述IP五元组信息查询的；
    所述MEC平台根据所述承载上下文响应消息获取所述基站设备的TEID。
  9. 根据权利要求1所述的方法，其特征在于，所述GTP-U上行报文中包含所述基站设备的TEID，
    所述MEC平台根据所述GTP-U上行报文获取所述基站设备的TEID，包括：
    所述MEC平台获取所述GTP-U上行报文中包含的所述基站设备的TEID。
  10. 根据权利要求1至9中任一项所述的方法，其特征在于，所述GTP-U下行报文中包含需要发送给用户设备的下行数据报文，所述MEC平台接收基站设备发送的GTP-U上行报文后，所述方法还包括：
    所述MEC平台根据所述GTP-U上行报文生成所述下行数据报文；
    所述MEC平台根据所述GTP-U上行报文获取所述基站设备的TEID之前，所述方法还包括：
    所述MEC平台根据所述下行数据报文确定未存储所述基站设备的TEID。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，所述MEC平台根据所述GTP-U上行报文获取所述基站设备的TEID之后，所述方法还包括：
    所述MEC平台存储所述基站设备的TEID。
  12. 根据权利要求1至11中任一项所述的方法，所述MEC平台向所述基站设备发送GTP-U下行报文之后，所述方法还包括：
    所述MEC平台接收所述基站设备发送的所述GTP-U上行报文；
    所述MEC平台根据所述GTP-U上行报文确定存储有所述基站设备的TEID；
    所述MEC平台向所述基站设备发送所述GTP-U下行报文，所述GTP-U下行报文中包含所述基站设备的TEID。
  13. 根据权利要求12所述的方法，所述MEC平台根据所述GTP-U上行报文确定存储有所述基站设备的TEID，包括：
    所述MEC平台根据所述GTP-U上行报文生成所述需要发送给所述基站设备的下行数据报文；
    所述MEC平台根据所述下行数据报文确定存储有所述基站设备的TEID。
  14. 一种通用分组无线系统GPRS隧道协议用户面GTP-U下行报文的发送装置，其特征在于，包括：网络接口和处理器，
    所述网络接口，用于接收基站设备发送的GTP-U上行报文；
    所述处理器，用于根据所述GTP-U上行报文获取所述基站设备的隧道端点标识TEID；
    所述网络接口，还用于向所述基站设备发送GTP-U下行报文，所述GTP-U下行报文中包含所述基站设备的TEID。
  15. 根据权利要求14所述的装置，其特征在于，所述GTP-U上行报文中包含用户设备的互联网协议IP地址，
    所述处理器还用于根据所述GTP-U上行报文生成第一IP报文，所述第一IP报文中包含所述用户设备的IP地址；
    所述网络接口还用于向IP网络发送所述第一IP报文，其中，所述第一IP报文发送至所述IP网络后基于所述用户设备的IP地址被路由至分组数据网络网关PGW，以使得所述PGW向服务网关SGW发送第一GTP-U格式的报文，所述第一GTP-U格式的报文中包含所述第一IP报文，以及用于接收所述SGW发送的第二GTP-U格式的报文，所述第二GTP-U格式的报文为所述SGW根据所述第一GTP-U格式的报文生成的，其中，所述第二GTP-U格式的报文中包含所述第一IP报文和所述基站设备的TEID；
    所述处理器具体用于根据所述第二GTP-U格式的报文获取所述基站设备的TEID。
  16. 根据权利要求15所述的装置，其特征在于，所述处理器还用于将所述GTP-U上行报文解封装，以及具体用于根据解封装的GTP-U上行报文生成所述第一IP报文。
  17. 根据权利要求14所述的装置，其特征在于，所述GTP-U上行报文中包含用户设备的IP地址，
    所述处理器还用于根据所述GTP-U上行报文生成第二IP报文，所述第二IP报文中包含所述用户设备的IP地址；
    所述网络接口还用于通过SGW和PGW向服务器发送所述第二IP报文，以使得所述服务器根据所述第二IP报文生成响应的报文后，将所述响应的报文发送给所述PGW，从而使得所述PGW向所述SGW发送第三GTP-U格式的报文，所述第三GTP-U格式的报文中包含所述响应的报文，以及用于接收所述SGW发送的第四GTP-U格式的报文，所述第四GTP-U格式的报文为所述SGW根据所述第三GTP-U格式的报文生成的，其中，所述第四GTP-U格式的报文中包含所述响应的报文和所述基站设备的TEID；
    所述处理器具体用于根据所述第四GTP-U格式的报文获取所述基站设备的TEID。
  18. 根据权利要求14所述的装置，其特征在于，
    所述网络接口还用于通过SGW向PGW发送所述GTP-U上行报文，并通过所述PGW将所述GTP-U上行报文解封装后，将解封装的GTP-U上行报文发送给服务器，以使得所述服务器根据所述解封装的GTP-U上行报文生成响应的报文后，将所述响应的报文发送给所述PGW，从而使得所述PGW向所述SGW发送第五GTP-U格式的报文，所述第五GTP-U格式的报文中包含所述响应的报文，以及用于接收所述SGW发送的第六GTP-U格式的报文，所述第六GTP-U格式的报文为所述SGW根据所述第五GTP-U格式的报文生成的，其中，所述第六GTP-U格式的报文中包含所述响应的报文和所述基站设备的TEDI；
    所述处理器具体用于根据所述第六GTP-U格式的报文获取所述基站设备的TEID。
  19. 根据权利要求14所述的装置，其特征在于，所述GTP-U上行报文中包含用户设备的IP地址，
    所述网络接口还用于向SGW或服务能力开放平台发送承载上行文请求消息，所述承载上下文请求消息用于向所述SGW或所述服务能力开放平台查询所述基站设备的TEID，其中，所述承载上下文请求消息中包含IP五元组信息，所述IP五元组信息中的目的地址为所述用户设备的IP地 址，以及用于接收所述SGW或所述服务能力开放平台发送的承载上下文响应消息，所述承载上下文响应消息中包含所述基站设备的TEID，所述基站设备的TEID为所述SGW或所述服务能力开放平台根据所述IP五元组信息查询的；
    所述处理器具体用于根据所述承载上下文响应消息获取所述基站设备的TEID。
  20. 根据权利要求14所述的装置，其特征在于，
    所述网络接口具体用于接收包含所述基站设备的TEID的所述GTP-U上行报文；
    所述处理器具体用于获取所述GTP-U上行报文中包含的所述基站设备的TEID。
  21. 根据权利要求14至20中任一项所述的装置，其特征在于，所述GTP-U下行报文中包含需要发送给用户设备的下行数据报文，
    所述处理器还用于在所述网络接口接收所述基站设备发送的所述GTP-U上行报文后，根据所述GTP-U上行报文生成所述下行数据报文，以及用于根据所述下行数据报文确定未存储所述基站设备的TEID。
  22. 根据权利要求14至21中任一项所述的装置，其特征在于，所述处理器还用于在根据所述GTP-U上行报文获取所述基站设备的TEID后，存储所述基站设备的TEID。
  23. 根据权利要求14至22中任一项所述的装置，其特征在于，
    所述网络接口还用于在向所述基站设备发送所述GTP-U下行报文后，接收所述基站设备发送的所述GTP-U上行报文；
    所述处理器还用于根据所述GTP-U上行报文确定存储有所述基站设备的TEID；
    所述网络接口还用于向所述基站设备发送所述GTP-U下行报文，所述GTP-U下行报文中包含所述基站设备的TEID。
  24. 根据权利要求23所述的装置，其特征在于，所述处理器还用于根据所述GTP-U上行报文生成所述需要发送给所述基站设备的下行数据报文，以及具体用于根据所述下行数据报文确定存储有所述基站设备的TEID。
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KR20180099388A (ko) * 2017-02-28 2018-09-05 주식회사 이노와이어리스 모바일 엑스홀 네트워크에서의 데이터 처리 방법
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TWI721700B (zh) * 2019-12-10 2021-03-11 中華電信股份有限公司 取得完整gprs隧道協議用戶數據隧道封包資訊的方法及系統

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KR20180034632A (ko) 2018-04-04

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