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WO2017124231A1 - Procédé d'attribution d'adresse de protocole internet (ip), passerelle de plan de commande et passerelle de plan utilisateur - Google Patents

Procédé d'attribution d'adresse de protocole internet (ip), passerelle de plan de commande et passerelle de plan utilisateur Download PDF

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Publication number
WO2017124231A1
WO2017124231A1 PCT/CN2016/071247 CN2016071247W WO2017124231A1 WO 2017124231 A1 WO2017124231 A1 WO 2017124231A1 CN 2016071247 W CN2016071247 W CN 2016071247W WO 2017124231 A1 WO2017124231 A1 WO 2017124231A1
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WIPO (PCT)
Prior art keywords
address
plane gateway
server
user plane
request message
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Ceased
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PCT/CN2016/071247
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English (en)
Chinese (zh)
Inventor
周润泽
曹龙雨
张艳平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2016/071247 priority Critical patent/WO2017124231A1/fr
Publication of WO2017124231A1 publication Critical patent/WO2017124231A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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 invention relates to the field of communications, and in particular, to a method for allocating an Internet Protocol (IP) address, a control plane gateway, and a user plane gateway.
  • IP Internet Protocol
  • control plane In the network architecture of Control and User Plane Separation (CUPS), the control plane is separated from the user plane, and some or all of the network elements that have both the control plane and the user plane function are split into control planes. Two entities, the NE and the user plane NE.
  • CUPS Control and User Plane Separation
  • the control plane network element has a control plane function, which mainly includes signaling connection with other network elements, handling mobility management and session management requests of user equipment, managing user equipment context, and establishing transmission data. The channel and so on.
  • the user plane network element has a user plane function, which mainly includes sending uplink and downlink data packets of the user equipment, performing quality of service (QoS) control and traffic statistics for data packets.
  • QoS quality of service
  • the traditional Public Data Network GateWay is split into CGW (Control GateWay) and UGW (User GateWay).
  • the UGW has the control plane function of the PGW, and the UGW has the user plane function of the PGW.
  • IP Internet Protocol
  • a specific method for allocating an IP address by using a dynamic IP address allocation mechanism is as follows: a network device (such as an MME) determines that a dynamic IP address needs to be allocated to a UE according to a service requested by a user equipment (UE) and a subscription information of the UE. Requesting a PGW, the PGW is required to assign an address to the UE.
  • a network device such as an MME
  • the PGW If the PGW has the ability to assign an IP address (for example, if an IP address pool is configured), the PGW directly returns the assigned IP address to the UE; if the PGW does not have the ability to assign an IP address, it needs to have a server with an IP address assigned externally. (such as a DHCP server) request to assign an IP address. When the PGW receives the address assigned by the external server, it sends it to the UE.
  • a server with an IP address assigned externally such as a DHCP server
  • the present invention provides a method for allocating an IP address, a control plane gateway, and a user plane gateway, which are capable of allocating an IP address to a UE in a network separate from the CU.
  • the present invention provides a method of assigning an IP address.
  • the control plane gateway receives the first request message sent by the UE; then the control plane gateway determines, according to the first request message, whether the IP address is assigned by the control plane gateway; when the control plane gateway determines that the IP address is assigned by the control plane gateway, the IP address is allocated.
  • the control plane gateway determines that the IP address is not assigned by the control plane gateway, it sends policy information to the user plane gateway that triggers the user plane gateway to assign an IP address and/or carries a message indicating the policy information of the user plane gateway assigning the IP address.
  • the control plane gateway After receiving the IP address request message of the UE, the control plane gateway first determines whether the IP address is allocated by itself. If the control plane gateway determines to assign an IP address by itself, it continues to allocate the IP address; if the control plane gateway determines that the IP address is not assigned by itself, the control plane gateway sends a message to the user plane gateway to facilitate the assignment of the IP address by the user plane gateway.
  • the technical solution of the present invention makes it possible for the UE to be assigned an IP address by the control plane gateway or the user plane gateway in the CU-separated network.
  • the first request message carries at least one of a service type requested by the UE, an Access Point Name (APN) corresponding to the UE, identity information of the UE, and authentication key information of the UE.
  • a kind of information A kind of information.
  • the control plane gateway may determine whether the IP address is allocated by the control plane gateway according to the foregoing information carried by the first request.
  • the control plane gateway can also be determined based on the real-time status of its capabilities or capabilities.
  • the control plane gateway determines whether to assign an IP address by itself according to specific conditions, and can fully utilize network resources to improve the efficiency of allocating IP addresses.
  • the control plane gateway determines, according to the first request message, whether the IP address is allocated by the control plane gateway, specifically: the control plane gateway determines, according to the type of the first request message, whether the IP address is allocated by the control plane gateway. That is, after determining that the first request message is a message requesting the control plane gateway to allocate an IP address to the UE, the control plane gateway determines whether the IP address is allocated by the control plane gateway.
  • control plane gateway allocates an IP address in a specific manner: locally assigning an IP address or assigning an IP address through a server.
  • the control plane gateway allocates an IP address by using the server, where the control plane gateway sends a message to the user plane gateway for instructing the user plane gateway to send the second request message to the server, where the second request message is used.
  • the requesting server allocates an IP address; the control plane gateway connects to the IP address forwarded by the server through the user plane gateway.
  • the control plane gateway allocates an IP address through the server, specifically: The control plane gateway sends a third request message to the server, the third request message is used to request the server to allocate an IP address, and the control plane gateway receives the IP address sent by the server.
  • control plane gateway sends the third request message to the server, where the control plane gateway sends the third request message to the server by using the user plane gateway.
  • the IP address sent by the control plane gateway receiving server is specifically: the control plane gateway receives the IP address forwarded by the server through the user plane gateway.
  • the server is a Dynamic Host Configuration Protocol (DHCP) server.
  • DHCP Dynamic Host Configuration Protocol
  • the control plane gateway when the server is a DHCP server, before the control plane gateway allocates the IP address through the DHCP server, the control plane gateway sends a request for the UE to the server with the authentication function through the user plane gateway.
  • the control plane gateway receives the authentication response message forwarded by the server with the authentication function through the user plane gateway; the control plane gateway determines, according to the authentication response message, that the server having the authentication function successfully authenticates the UE.
  • the message for requesting authentication of the UE is sent to the server with the authentication function directly or through the user plane gateway, and directly or through the user plane gateway. Receiving an authentication response message sent by the server with the authentication function, and then determining that the UE is successfully authenticated according to the authentication response message.
  • the UE may be assigned an IP address after the UE is successfully authenticated.
  • the server with the authentication function may be an authentication, authorization, and accounting (AAA) server, and may perform remote authentication dial-in user service (RADIUS) authentication on the UE.
  • AAA authentication, authorization, and accounting
  • RADIUS remote authentication dial-in user service
  • the control plane gateway before the control plane gateway allocates the IP address, the control plane gateway receives the fourth request message sent by the user plane gateway, and the fourth request message is a message that the user plane gateway receives the request for sending the IP address by the UE.
  • control plane gateway after receiving the IP address request message of the UE, the control plane gateway also needs to receive the IP address request message sent by the UE reported by the user plane gateway through the user plane, and then allocate the IP address.
  • the IP address is sent to the UE.
  • the control plane gateway may directly send an IP address to the UE, or may forward the IP address to the UE through a network element such as a mobility management network element or a base station.
  • This implementation enables the UE to assign an IP address during the default bearer setup.
  • the present invention provides a method of assigning an IP address.
  • the user plane gateway determines, according to the first request message, that the user plane gateway locally allocates an IP address or allocates an IP address by using a server; and the user plane gateway receives the control plane gateway to send the
  • the message for triggering the IP address of the user plane gateway is triggered, it is determined that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server; and the user plane gateway receives the first request message sent by the UE and the bearer sent by the receiving control plane gateway.
  • the message indicating the policy information of the IP address is assigned by the user plane gateway, it is determined according to the first request message and the policy information that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server.
  • the user plane gateway determines that the IP address is locally allocated by the user plane gateway, the IP address is locally allocated; when the user plane gateway determines that the IP address is allocated by the server, the IP address is allocated by the server.
  • the user plane gateway determines whether to directly allocate the IP address by itself according to the request message or/and the policy information.
  • the server assigns an IP address and performs a corresponding process of assigning an IP address.
  • determining, by the first request message, that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server is: the user plane gateway determines the user plane gateway according to the type of the first request message. Assigning an IP address locally or assigning an IP address through a server; determining, according to the first request message and the policy information, that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server is: the type of the first request message is determined by the user plane gateway. And the policy information determines that the IP address is assigned locally by the user plane gateway or by the server.
  • the type of the first request message means that the request message is a message requesting the user plane gateway to allocate an IP address to the UE.
  • the user plane gateway determines whether the IP address is allocated by itself or through the server according to the policy message received from the control plane gateway, so that the user plane in the network separated by the CU The gateway allocates IP addresses according to the decision of the control plane gateway.
  • the user plane gateway allocates an IP address through the server, where the user plane gateway sends a message of the second request message to the server, the second request message is used to request the server to allocate the IP address, and the user plane gateway receives the server.
  • the server is a DHCP server.
  • the user plane gateway before the user plane gateway allocates the IP address by using the server, the user plane gateway sends a request message for requesting authentication of the UE to the server with the authentication function; the user plane gateway receives the authentication.
  • the authentication response message sent by the function server; the user plane gateway determines, according to the authentication response message, that the server having the authentication function successfully authenticates the UE.
  • the server with the authentication function sends a message for requesting authentication of the UE, and receives the authentication response sent by the server with the authentication function. The message is then determined to successfully authenticate the UE according to the authentication response message.
  • the UE may be assigned an IP address after the UE is successfully authenticated.
  • the server with the authentication function may be an AAA server, and may perform RADIUS authentication on the UE.
  • the method further includes: the user plane gateway sends an IP address to the UE, or sends an IP address to the control plane gateway, so that the control plane gateway sends the IP address to the UE.
  • a control plane gateway includes a receiving unit, configured to receive a first request message sent by the user equipment UE, and a determining unit, configured to determine, according to the first request message, whether an IP address is allocated by the control plane gateway, and an allocating unit, configured to determine, by the determining unit, by the control When the IP address is assigned by the gateway, the IP address is allocated; the sending unit is configured to send, when the determining unit determines that the IP address is not assigned by the control plane gateway, trigger the user plane gateway to allocate the IP address and/or carry the indication user plane to the user plane gateway.
  • the gateway assigns a message of the policy information of the IP address.
  • the control plane gateway of the present invention After receiving the IP address request message of the UE, the control plane gateway of the present invention first determines whether an IP address is allocated by itself. If the control plane gateway determines to assign an IP address by itself, it continues to allocate the IP address; if the control plane gateway determines that the IP address is not assigned by itself, the control plane gateway sends a message to the user plane gateway to facilitate the assignment of the IP address by the user plane gateway.
  • the technical solution of the present invention makes it possible for the UE to be assigned an IP address by the control plane gateway or the user plane gateway in the CU-separated network.
  • the first request message carries at least one of a service type requested by the UE, an APN corresponding to the UE, identity information of the UE, and authentication key information of the UE.
  • the determining unit may determine whether the IP address is allocated by the control plane gateway according to the foregoing information carried by the first request.
  • the determination unit can also be determined based on the real-time status of its capabilities or capabilities. The determining unit determines whether the IP address is assigned by itself according to the specific situation, and can fully utilize the network resources and improve the efficiency of allocating the IP address.
  • the determining unit is specifically configured to use the type of the first request message. Determine if the IP address is assigned by the control plane gateway.
  • the type of the first request message means that the request message is a message requesting the control plane gateway to allocate an IP address to the UE.
  • the allocating unit is specifically configured to locally allocate an IP address or allocate an IP address through a server.
  • the allocating unit is specifically configured to send, to the user plane gateway, a message for instructing the user plane gateway to send a second IP address request message to the server, where the second IP address request message is used to request the server to allocate the IP; And receive the IP address forwarded by the server through the user plane gateway.
  • the allocating unit is specifically configured to: send a third IP address request message to the server, where the third IP address request message is used to request the server to allocate an IP address; and receive an IP address sent by the server.
  • the allocating unit is specifically configured to send a third IP address request message to the server through the user plane gateway; and receive an IP address forwarded by the server through the user plane gateway.
  • the server is a DHCP server.
  • the allocating unit is further configured to send a request for authenticating the UE to the server having the authentication function through the user plane gateway before the IP address is allocated by the DHCP server. Receiving the request message; and receiving the authentication response message forwarded by the server with the authentication function through the user plane gateway; and then determining, according to the authentication response message, that the server having the authentication function successfully authenticates the UE.
  • the allocating unit before the allocation of the IP address locally, is further configured to: send a message for requesting authentication of the UE to the server having the authentication function directly or through the user plane gateway, and directly or The user plane gateway receives the authentication response message sent by the server with the authentication function, and then determines that the UE is successfully authenticated according to the authentication response message.
  • the UE may be assigned an IP address after the UE is successfully authenticated.
  • the server with the authentication function may be an AAA server, and may perform RADIUS authentication on the UE.
  • the receiving unit before receiving the IP address, is further configured to receive a fourth request message sent by the user plane gateway, where the fourth request message is used by the user plane gateway to receive the request sent by the UE to allocate an IP address.
  • the sending unit is further configured to send the IP address to the UE.
  • the fourth aspect provides a user plane gateway.
  • the username gateway includes a receiving unit for Receiving a first request message sent by the UE, receiving a message sent by the control plane gateway for triggering the user plane gateway to allocate an IP address, or receiving a first request message sent by the UE, and carrying by the control plane gateway to indicate that the user plane gateway allocates the IP address.
  • the message of the address's policy information includes
  • a determining unit configured to: when the receiving unit receives the first request message sent by the UE, determine, according to the first request message, that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server; and is used by the receiving unit to receive the control plane gateway When the message for triggering the user plane gateway to allocate the IP address is used, it is determined that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server; and the first request message sent by the UE and the carrying by the control plane gateway are received at the receiving unit.
  • the allocation unit is configured to determine in the determining unit When the user plane gateway locally allocates an IP address, the IP address is locally allocated; the allocating unit is further configured to determine, by the determining unit, the IP address by the server, and allocate the IP address by the server.
  • the user plane gateway of the present invention receives a message sent by the UE requesting to allocate an IP address, and determines whether it is determined whether to allocate an IP address by itself or through a server.
  • the technical solution of the present invention enables an IP address to be allocated to a UE by a user plane gateway or a server in a network separated by CUs.
  • the determining unit is specifically configured to determine, according to the type of the first request message, locally assigning an IP address by the user plane gateway or assigning an IP address by using a server; the determining unit is further configured to be used according to the type of the first request message.
  • the policy information determines that the IP address is assigned locally by the user plane gateway or by the server.
  • the type of the first request message means that the request message is a message requesting the user plane gateway to allocate an IP address to the UE.
  • the allocating unit is specifically configured to send a message of the second IP address request message to the server, where the second IP address request message is used to request the server to allocate an IP address; and receive the IP address sent by the server.
  • the allocating unit before assigning an IP address by the server, is further configured to send a request message for requesting authentication of the UE to the server having the authentication function; and receive the server with the authentication function. The sent authentication response message; and then determining, according to the authentication response message, that the server having the authentication function successfully authenticates the UE.
  • the allocating unit before the allocating unit locally allocates the IP address, the allocating unit is further configured to send a message for requesting authentication to the UE to the server having the authentication function, and receive the packet sent by the server with the authentication function. The right response message is then determined to successfully authenticate the UE according to the authentication response message.
  • the UE may be assigned an IP address after the UE is successfully authenticated.
  • the server with the authentication function may be an AAA server, and may perform RADIUS authentication on the UE.
  • the username gateway further includes a sending unit, configured to send an IP address to the UE or send an IP address to the control plane gateway, so that the control plane gateway sends the IP address to the UE.
  • a fifth aspect provides a control plane gateway.
  • the control plane gateway includes a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by a bus system, the memory is for storing instructions, the receiver and the transmitter are respectively for receiving and transmitting messages, the processor is for executing instructions stored by the memory, and the receiver and the transmitter are called. Perform the first aspect or any of its possible implementations.
  • a user plane gateway includes a receiver, a transmitter, a memory, a processor, and a bus system.
  • the receiver, the transmitter, the memory and the processor are connected by a bus system, the memory is for storing instructions, the receiver and the transmitter are respectively for receiving and transmitting messages, the processor is for executing instructions stored by the memory, and the receiver and the transmitter are called. Perform the second aspect or any of its possible implementations.
  • FIG. 1 is a schematic diagram of a possible network architecture of the present invention.
  • FIG. 2 is a schematic flow chart of a method for allocating an IP address according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for allocating an IP address according to another embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a method for allocating an IP address according to still another embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method for allocating an IP address according to still another embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a method for allocating an IP address according to still another embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a method for allocating an IP address according to still another embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a control plane network element in accordance with one embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of a control plane network element in accordance with another embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of a user plane network element according to an embodiment of the present invention.
  • FIG. 11 is a schematic block diagram of a user plane network element according to another embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a CPUS network architecture of an embodiment of the present invention, which mainly includes a UE, an Evolved Node B (eNB), a control plane gateway, a user plane gateway, and a server.
  • eNB Evolved Node B
  • control plane gateway a control plane gateway
  • user plane gateway a user plane gateway
  • server a server
  • the dashed line in Figure 1 indicates the transmission of a message through the control plane, which enables the transmission of messages or messages through the user plane.
  • a UE may be referred to as an access terminal, a terminal device, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.
  • the UE may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or a wireless communication function.
  • the UE can communicate with the control plane network through signaling messages, and can also send and receive data packets with the user plane gateway.
  • the eNB is only one possible component of a CP-separated network architecture to which the present invention is applicable. It may also be a Mobility Management Entity (MME) or a base station device or a small base station in a future 5G network. Equipment, etc.
  • MME Mobility Management Entity
  • the UE communicates with the control plane gateway and the user plane gateway through the eNB.
  • the UE can directly communicate with the control plane gateway and the user plane gateway, that is, the network architecture of the CP separation may not have an eNB, and the present invention does not limited.
  • the control plane gateway has a control plane interface, which is mainly used for signaling connection with other network elements, processing user mobility management and session management requests, managing user context and establishing a channel for transmitting data.
  • the control plane gateway can be used for gateway autonomous allocation when static IP address allocation or dynamic IP address allocation.
  • the control plane gateway may be a CGW having a control plane function after the PGW is separated.
  • the user plane gateway has a user plane interface, which is mainly used for sending user uplink and downlink data packets, performing QoS control for data packets, and traffic statistics.
  • the user plane gateway can be used for gateway autonomous allocation during dynamic IP address allocation and external network allocation when dynamic IP address allocation.
  • the server can assign an IP address and connect to the user plane gateway to send and receive data packets.
  • the user plane gateway may be a UGW with a user plane function after the PGW is separated.
  • the control plane gateway receives the first request message sent by the UE.
  • the first request message may carry information such as a service type requested by the UE, an APN corresponding to the UE, identity information of the UE, and authentication key information of the UE.
  • the control plane gateway may determine whether the IP address is allocated by the control plane gateway according to the foregoing information carried by the first request.
  • the control plane gateway can also be determined based on the real-time status of its capabilities or capabilities.
  • the control plane gateway determines whether to assign an IP address by itself according to specific conditions, and can fully utilize network resources to improve the efficiency of allocating IP addresses.
  • the UE When the UE needs to establish a session or establish a bearer, it sends an IP address request message to the control plane gateway, and the message may carry information of the UE and/or information of the server.
  • the control plane gateway determines whether an IP address is allocated by the control plane gateway.
  • the control plane gateway After receiving the IP address request message of the UE, the control plane gateway determines whether it is necessary to allocate an IP address by itself.
  • a possible implementation manner of the control plane gateway determining whether to allocate an IP address by itself is as follows: The control plane gateway may determine according to different service types requested by the UE (or service types subscribed by the UE). For example, if the UE requests services such as the MBB service, the Internet of Vehicles service, or the Internet of Things service, it is determined that the IP address is assigned by the control plane gateway; if the UE requests the services of the enterprise network service, the public security service, the private cloud service, etc., The control plane gateway assigns an IP address.
  • the control plane gateway can also be determined according to the APN requested by the UE. For example, when the UE requests to access an APN that provides an MBB service, a car network service, or an Internet of Things service, it is determined that the IP address is assigned by the control plane gateway, and when the request is made to provide an enterprise network service, a public security service, a private cloud service, or the like. At APN, it is determined that the IP address is not assigned by the control plane gateway.
  • the control plane gateway can also be determined according to its own capabilities. For example, if the control plane gateway is configured with a local IP address pool, it is determined that it is allocated by the control plane gateway. If not, it is not allocated by the control plane gateway.
  • the control plane gateway can also be determined based on the real-time status of its capabilities. For example, although the control plane gateway is configured with a local IP address pool, but the address in the address pool has been allocated, at this time, the IP address cannot be assigned by the control plane gateway.
  • the control plane gateway may further determine, according to the type of the first request message, whether the IP address is assigned by the control plane gateway, that is, when the control plane gateway determines that the first request message is a message requesting the control plane gateway to allocate an IP address for the UE, determining whether the control is controlled by the control plane The gateway assigns an IP address.
  • the control plane gateway determines that the IP address is assigned by the control plane gateway, the IP address is allocated.
  • control plane gateway determines that it has assigned an IP address by itself, it can further determine whether the IP address is assigned through the DHCP mechanism or the IP address is allocated through the non-DHCP mechanism.
  • the DHCP mechanism is an IP address allocation method. Usually two entities participate, one is a DHCP client and the other is a DHCP server.
  • the DHCP Client requests the DHCP Server to assign an IP address, and the DHCP Server assigns an IP address to the DHCP Client.
  • the IP address can be an IPv4 address, an IPv6 full address, or another address.
  • control plane gateway determines that the IP address is assigned through the DHCP mechanism, if it can act as a DHCP server, the control plane gateway directly assigns an IP address to the UE from the IP address pool, and directly sends the message to the UE or through the network with the control plane function.
  • the element sends the IP address to the UE.
  • control plane gateway determines that the IP address is assigned through the DHCP mechanism, but it cannot allocate an IP address by itself, it can request the DHCP server to assign an IP address as a DHCP Client.
  • the control plane gateway requests the DHCP server to assign an IP address.
  • the implementation method is that the control plane gateway constructs a DHCP request message and sends it to the DHCP server, but because the interface with the DHCP server is on the user plane gateway (such as The UGW after the PGW is separated, so the message must be sent to the user plane gateway first, and then forwarded to the DHCP server by the user plane gateway.
  • the DHCP server assigns an IP address, it sends it to the control plane gateway through the user plane gateway, and the control plane gateway sends the IP address to the UE.
  • control plane gateway notifies the user plane that the gateway sends a DHCP request message to the DHCP server, and the DHCP server allocates an IP address, and then the user plane gateway forwards the IP address to the control plane gateway, and the control plane gateway then sets the IP address. Send to the UE.
  • the control plane gateway may also notify the user plane gateway of the IP address.
  • control plane gateway determines to use the non-DHCP mechanism to allocate an IP address
  • one implementation manner is: the control plane gateway constructs the request message itself and sends it to the external server, but because the interface with the external server is at the user plane gateway, the message must first To be sent to the user plane gateway, the user plane gateway forwards it to the external server; the external server sends the assigned IP address to the control plane gateway, and then the control plane gateway sends it to the UE.
  • the control plane gateway may also notify the user plane gateway of the IP address.
  • the user plane gateway sends the message through the control plane gateway.
  • the indication information in the message or its own configuration information determines the address of the AAA server, and constructs a request message, and sends the UE information (including the authentication information) and the service information to the AAA server.
  • the AAA Server assigns an IP address, it returns the IP address to the user plane gateway.
  • the AAA Server may only authenticate and not return an IP address. If the AAA Server does not return an IP address, the user plane gateway needs to re-allocate the IP address through DHCP.
  • the above manner describes that an IP address is allocated and sent to the UE during the default bearer setup process.
  • the control plane gateway may also allocate and send an IP address to the UE after the default bearer setup procedure.
  • the control plane gateway does not immediately allocate the IP address.
  • the UE sends a user plane IP address request message to the user plane gateway, and the user plane gateway reports the message to the control plane gateway.
  • the control plane gateway will use the above DHCP mechanism or non-DHCP mechanism to allocate an IP address and send the IP address to the UE.
  • the server may fail to assign an IP address.
  • the server may return a response message to the control plane gateway to notify the control plane that the server fails to assign an IP address.
  • the control plane gateway can allocate an IP address by other means.
  • control plane gateway determines that the IP address is not assigned by the control plane gateway, the control plane gateway sends a message to the user plane gateway that triggers the user plane gateway to allocate an IP address and/or carries policy information indicating that the user plane gateway allocates an IP address.
  • the control plane gateway sends an IP address request message to the user plane gateway, and may carry the following information according to specific requirements: UE information, service information, bearer identifier, indication identifier, or external server identifier.
  • the indication identifier may be used to indicate that the address is assigned by the user plane gateway or the IP address is assigned by the user plane gateway in conjunction with the external server. If there is no indication, the user plane gateway can judge from the message name that the address is assigned by the user plane gateway or that the user plane gateway associates with the external server to allocate an IP address.
  • the indication identifier can be used to instruct the external server to allocate an IP address, and the request message can carry the IP address or identifier of the external server.
  • the user plane gateway after receiving the request message sent by the control plane gateway, the user plane gateway can allocate an IP address according to various information carried in the request message.
  • FIG. 3 is a schematic flowchart of a method for allocating an IP address according to an embodiment of the present invention.
  • the user plane gateway determines, according to the first request message, that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server; and the user plane gateway receives the control plane gateway for triggering the user.
  • the gateway allocates the IP address message it is determined that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server; and the user plane gateway receives the first request message sent by the UE and the bearer sent by the receiving control plane gateway is used to indicate the user plane.
  • the gateway allocates the message of the policy information of the IP address, it is determined according to the first request message and the policy information that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server.
  • the user plane gateway may be a UGW after the PGW is separated.
  • the type of the first request message is that the request message is a message for requesting the user plane gateway to allocate an IP address to the UE.
  • determining, according to the first request message, that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server is specifically: After determining that the first request message is a message requesting the user plane gateway to allocate an IP address to the UE, the user plane gateway determines that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server.
  • the user plane gateway determines, after determining that the first request message is a message requesting the user plane gateway to allocate an IP address for the UE, according to the message
  • the policy information determines that the IP address is assigned locally by the user plane gateway or by the server.
  • the policy information sent by the control plane gateway received by the user plane gateway may carry the following information according to specific requirements: UE information, service information, bearer identifier, indication identifier, or external server identifier.
  • the indication identifier can be used to indicate that the address is assigned by the user plane gateway. If there is no indication, the user plane gateway can determine from the message name that the address is assigned by the user plane gateway.
  • the indication identifier can also be used to indicate the IP address of the external server, or the IP address or identifier of the request server that can carry the external server.
  • the user plane gateway may determine, according to the policy information, whether to assign an IP address to the UE in the process of establishing the default bearer by itself or through the server; or may be configured to allocate an IP address upon receiving the request of the UE. After the request message, it is determined according to the request message whether the IP address is allocated to the UE after the default establishment process by itself or through the server. Certainly, the user plane gateway may also determine whether to directly allocate an IP address by itself according to the policy information and the request message after receiving the policy information sent by the control plane gateway and receiving the request message for requesting the IP address sent by the UE. The server assigns an IP address.
  • the IP address is locally allocated.
  • the user plane gateway determines that the IP address is determined by the user plane gateway according to the name of the IP address request message sent by the control plane gateway or the indication identifier or other information carried in the message, it is further determined whether the IP address is allocated through the DHCP mechanism.
  • the user plane gateway When the user plane determines that the IP address is assigned through the DHCP mechanism, and the DHCP server can be used as the DHCP server, the user plane gateway directly allocates the P address to the UE from the IP address pool, and then firstly goes to the control plane gateway in the process of establishing the default bearer.
  • the IP address is sent, and the IP address is sent by the control plane gateway to the UE, or the IP address is directly sent to the UE after the default bearer setup process.
  • the user plane gateway can request the DHCP server to assign an IP address as a DHCP client.
  • the specific implementation manner is: the user plane gateway sends a DHCP request message to the DHCP server, and the DHCP server allocates an IP address.
  • the user plane gateway receives the IP address sent by the DHCP server, the user plane gateway sends the IP address to the control plane gateway in the default bearer establishment process, and the control plane gateway sends the IP address to the UE, or the user plane gateway.
  • the IP address is directly sent to the UE after the default bearer setup process.
  • the user plane gateway may also notify the control plane gateway of the IP address.
  • the user plane gateway constructs the request message, sends the request to the external server, and requests the external server to allocate the IP address; then the user plane gateway receives the IP sent by the external server. After the address, the user plane gateway sends the IP address to the control plane gateway in the default bearer setup process, and the control plane gateway sends the IP address to the UE, or the user plane gateway directly IP address after the default bearer setup process. Send to the UE.
  • the user plane gateway may also notify the control plane gateway of the IP address.
  • the user plane gateway determines the address of the AAA Server through the indication information in the message sent by the control plane gateway or its own configuration information, and constructs a request message, and the UE information (including the authentication information) and the service.
  • the information is sent to the AAA Server.
  • the AAA Server assigns an IP address, it returns the IP address to the user plane gateway.
  • the AAA Server may only authenticate and not return an IP address. If the AAA Server does not return an IP address, the user plane gateway needs to re-allocate the IP address through DHCP.
  • UGW can directly contact the external server; if the request message carries the identifier of the external server, UGW needs to use it to associate with the IP address of the saved external server, or by (Domain Name System , DNS) The server queries the IP address of the external server.
  • DNS Domain Name System
  • the IP address request message sent by the control plane gateway to the user plane gateway carries the bearer identifier, when the user plane gateway allocates an IP address, or requests the server to allocate an IP address, it may determine that the IP address corresponds to the bearer identifier.
  • the bearer is associated.
  • the user plane gateway allocates an IP address request message after receiving the IP address request message sent by the control plane gateway, and the user plane gateway receives the IP address request message sent by the control plane gateway, if the message carries The policy information indicating that the user plane gateway allocates an IP address to the UE, the user plane gateway also needs to receive the IP address request message sent by the UE after the default bearer setup procedure, and then the IP address is allocated.
  • the user plane gateway determines whether to use the DHCP mechanism to allocate an IP address according to the policy information sent by the user plane gateway, and then uses the above DHCP mechanism or non-DHCP mechanism to allocate an IP address, and The UE sends the IP address.
  • the policy can be a packet format matching and forwarding mode. For example, if a DHCP request packet sent by the UE is received, it is assigned an IP address. If the RADIS authentication packet sent by the UE is received, it is forwarded to the AAA Server, and the AAA Server authenticates and assigns an IP address. Further, if the AAA Server only authenticates but does not assign an IP address, the UGW continues to use the DHCP mechanism to assign an IP address.
  • the server may fail to assign an IP address.
  • the server may return a response message to the user plane gateway to notify the user that the server fails to allocate an IP address.
  • the user interface gateway can assign an IP address by other means.
  • FIG. 4 is a schematic flowchart of a method for allocating an IP address according to an embodiment of the present invention.
  • the CGW in FIG. 4 is an example of a control plane gateway in the method shown in FIGS. 2 and 3.
  • the UE sends a request message to the CGW, and the CGW receives the request message sent by the UE.
  • the CGW determines, according to the received request message, that the IP address is allocated by itself.
  • the CGW can determine to assign an IP address by itself according to its own capabilities, the real-time status of the capabilities, or the information of the UE.
  • the CGW may also determine whether to assign an IP address by itself according to the information carried in the request message or the name of the request message.
  • the CGW can determine that it can directly allocate IP from the IP address pool as a DHCP server and allocate an IP address from the IP address pool.
  • the CGW returns the allocated IP address to the UE.
  • CGW can directly send the IP address
  • the UE can also forward the IP address to the UE through the network element with the control plane function.
  • an IP address is allocated by the CGW, and an IP address allocation in a network in which the CU is separated is implemented.
  • FIG. 5 is a schematic flowchart of a method for allocating an IP address according to another embodiment of the present invention.
  • the same reference numerals in Fig. 5 as those in Fig. 4 denote the same meanings, and are not described herein again.
  • the CGW determines that the IP address is assigned by itself, and needs to allocate an IP address through the DHCP mechanism, and further determines that it needs to be the DHCP client to request the DHCP server to allocate an IP address. Therefore, the CGW sends a second request message to the DHCP server.
  • the server in Figure 5 is a DHCP Server.
  • the CGW can generate a request message to the DHCP server.
  • the message since the interface between the CGW and the DHCP server is in the UGW, the message must be sent to the UGW first, and then forwarded to the DHCP server by the UGW.
  • the CGW may also send a notification message to the UGW, informing the UGW to send a DHCP request message to the DHCP server, requesting the DHCP server to allocate an IP address.
  • the CGW can send a request message to, for example, the AAA Server.
  • the server in Figure 5 is an AAA Server.
  • the CGW sends a notification message to the UGW, informing the UGW to request an IP address from the AAA Server.
  • the UGW determines the address of the AAA Server through the indication information in the message sent by the CGW or its own configuration information, and constructs a request message, and sends the UE information (including the authentication information) and the service information to the AAA server.
  • the server After receiving the IP address request message sent by the UGW, the server allocates an IP address. If the server is an AAA server, the UE needs to be authenticated.
  • the server sends the assigned IP address to the UGW.
  • the server is an AAA server
  • the AAA server may only authenticate, but does not return an IP address.
  • the UGW also needs to allocate an IP address through the DHCP mechanism.
  • an IP address is allocated by a CGW joint server, and an IP address allocation in a network separated by a CU is implemented.
  • FIG. 6 is a schematic flowchart of a method for allocating an IP address according to another embodiment of the present invention.
  • the same reference numerals in Fig. 6 as those in Fig. 4 denote the same meanings, and are not described herein again.
  • the CGW After receiving the IP address request message sent by the UE, the CGW determines that the IP address is not assigned by itself, and needs to send an IP address request message to the UGW.
  • the UGW is an example of a user plane network element in the method shown in Figures 2 and 3.
  • the CGW sends, to the UGW, policy information for indicating that the UGW allocates an IP address, and the UGW receives the policy information that is sent by the CGW to indicate that the UGW allocates an IP address.
  • the UGW determines that the UGW can be used as the DHCP server, and the IP address is allocated in the UGW direct IP address pool.
  • the UGW sends the allocated IP address to the CGW, so that the CGW can send the IP address to the UE.
  • UGW can also directly send the IP address to the UE.
  • the CGW determines that the IP address is not assigned by itself, the CGW sends a message to the UGW, and the UGW allocates an IP address, thereby realizing the allocation of the IP address in the network separated by the CU.
  • FIG. 7 is a schematic flowchart of a method for allocating an IP address according to another embodiment of the present invention.
  • the same reference numerals in Fig. 6 as those in Figs. 4 and 6 denote the same meanings, and are not described herein again.
  • the UGW determines that the DHCP server is used to allocate the IP address. However, when the DHCP server cannot allocate the address as the DHCP server, the DHCP client needs to be the DHCP client to allocate the address. At this time, the UGW sends a second request message to the DHCP server. That is, at this time, the server in FIG. 7 is a DHCP Server.
  • the UGW may send a request message to, for example, the AAA Server.
  • the server in Figure 7 is an AAA Server.
  • the UGW determines the address of the AAA Server through the indication information in the message sent by the CGW or its own configuration information, and constructs a request message, and sends the UE information (including the authentication information) and the service information to the AAA server.
  • the server After receiving the IP address request message sent by the UGW, the server allocates an IP address. If the server is an AAA server, the UE needs to be authenticated.
  • the server sends the assigned IP address to the UGW.
  • the server is an AAA server
  • the AAA server may only authenticate, but does not return an IP address.
  • the UGW also needs to allocate an IP address through the DHCP mechanism.
  • the UGW sends the allocated IP address to the UE. At this time, the UGW can also send the IP address to the CGW, so that the CGW knows the allocation of the IP address.
  • an IP address is allocated by the UGW joint server, and the IP address allocation in the network separated by the CU is realized.
  • FIG. 8 to FIG. 10 show a control plane gateway and a user plane gateway for assigning an IP address according to an embodiment of the present invention.
  • control plane gateway 800 of the embodiment of the present invention includes a receiving unit 810, a determining unit 820, an allocating unit 830, and a transmitting unit 840.
  • the receiving unit 810 is configured to receive a first request message sent by the user equipment UE.
  • the determining unit 820 is configured to determine, according to the first request message, whether the IP address is allocated by the control plane gateway.
  • the allocating unit 830 is configured to allocate an IP address when the determining unit 820 determines that the IP address is assigned by the control plane gateway.
  • the sending unit 840 is configured to send, to the user plane gateway, a message that triggers the user plane gateway to allocate an IP address and/or carries policy information indicating the user plane gateway assigning an IP address when the determining unit 820 determines that the IP address is not assigned by the control plane gateway.
  • the control plane gateway implemented by the present invention can allocate an IP address in a network separated by CUs.
  • the first request message may carry at least one of a service type requested by the UE, an APN corresponding to the UE, identity information of the UE, and authentication key information of the UE.
  • the determining unit 820 is specifically configured to determine, according to at least one of a service type, an APN, an identity information, and an authentication key information carried in the first request message, whether the IP address is allocated by the control plane gateway.
  • the determining unit 820 can also be determined based on the real-time status of its capabilities or capabilities.
  • the control plane gateway determines whether to assign an IP address by itself according to specific conditions, and can fully utilize network resources to improve the efficiency of allocating IP addresses.
  • the determining unit is specifically configured to determine, according to the type of the first request message, whether the IP address is allocated by the control plane gateway.
  • the allocating unit 830 may be specifically configured to locally allocate an IP address or allocate an IP address through a server.
  • the allocating unit 830 may be specifically configured to send, to the user plane gateway, a message for instructing the user plane gateway to send a second request message to the server, where the second request message is used to request the server to allocate an IP address; and the receiving server passes the user plane.
  • the IP address forwarded by the gateway may be specifically configured to send, to the user plane gateway, a message for instructing the user plane gateway to send a second request message to the server, where the second request message is used to request the server to allocate an IP address; and the receiving server passes the user plane.
  • the IP address forwarded by the gateway.
  • the allocating unit 830 may be specifically configured to send a message of the third request message to the server, where the third request message is used to request the server to allocate an IP address; and receive the IP address sent by the server.
  • the allocating unit 830 may be specifically configured to send a third request message to the server by using the user plane gateway; and receive an IP address forwarded by the server through the user plane gateway.
  • the server can be a DHCP server.
  • the allocating unit 830 is further configured to send, by using the user plane gateway, a request message for authenticating the UE to the server having the authentication function; and receiving the server with the authentication function through the user.
  • the authentication response message forwarded by the gateway; and according to The authentication response message determines that the server having the authentication function successfully authenticates the UE.
  • the server with the authentication function may be an AAA server, and the RADIUS authentication may be performed on the UE.
  • the receiving module unit 810 is further configured to receive a fourth request message sent by the user plane gateway, where the fourth request message is after the user plane gateway receives the message that the UE sends the request to allocate the IP address.
  • the sending unit 840 is further configured to send the IP address to the UE.
  • FIG. 9 is a schematic block diagram of a control plane gateway 900 according to an embodiment of the present invention.
  • the control plane gateway shown in FIG. 9 includes a receiver 910, a processor 920, a transmitter 930, a memory 940, and a system bus 950.
  • the processor 920, the memory 940, the receiver 910, and the transmitter 930 are connected by a bus system 950 for storing instructions for executing instructions stored by the memory 940 to control the receiver 910 to receive signals.
  • the transmitter 930 is controlled to send a signal.
  • the control plane gateway 900 may correspond to the control plane gateway in the method shown in FIGS. 2 and 3, or may correspond to the control plane gateway shown in FIG. Specifically, the receiver 910 corresponds to the receiving unit 810 in FIG. 8, the processor 920 corresponds to the determining unit 810 and the allocating unit 830 in FIG. 8, and the transmitter 930 corresponds to the transmitting unit 840 in FIG.
  • the above and other operations and/or functions of the various units in the control plane gateway 900 of the embodiment of the present invention implement respective flows of the respective methods of FIGS. 2 through 7, respectively. It should be understood that in the process of the control plane gateway 900 implementing the flow of any of the methods of FIG. 2 to FIG.
  • the processor 920 is configured to execute the instructions stored by the memory 940 to control the receiver 910 to receive the corresponding method flow.
  • the various messages or messages received by the ingress device, and the various messages or messages sent by the access point device in the corresponding method flow are sent by the sender 930.
  • the sender 930 For brevity, no further details are provided herein.
  • FIG. 10 is a schematic block diagram of a user plane gateway 1000 according to an embodiment of the present invention.
  • the user plane gateway 1000 shown in FIG. 10 includes a receiving unit 1010, a determining unit 1020, and an allocating unit 1030.
  • the receiving unit 1010 is configured to receive the first request message sent by the UE, receive a message sent by the control plane gateway to trigger the user plane gateway to allocate an IP address, or receive the first request message sent by the UE, and carry the control plane to send A message indicating policy information for assigning an IP address to the user plane gateway.
  • the determining unit 1020 is configured to: when the receiving unit receives the first request message sent by the UE, determine, according to the first request message, that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server; and is used by the receiving unit to receive the control plane gateway.
  • the allocating unit 1030 is configured to locally allocate an IP address when the determining unit 1020 determines that the IP address is locally allocated by the user plane gateway.
  • the allocating unit 1030 is further configured to allocate an IP address by the server when the determining unit 1020 determines that the IP address is allocated by the server.
  • the user plane gateway of the embodiment of the present invention may allocate an IP address in a network separated by CUs.
  • the determining unit 820 is specifically configured to determine, according to the type of the first request message, that the IP address is locally allocated by the user plane gateway or the IP address is allocated by the server; the determining unit 820 is further configured to use the type and policy information according to the first request message. Make sure that the IP address is assigned locally by the user plane gateway or by the server.
  • the type of the first request message indicates that the request message is a message requesting the user plane gateway to assign an IP address to the UE.
  • the allocating unit 1030 may be specifically configured to send a message of the second request message to the server, where the second request message is used to request the server to allocate an IP address; and receive the IP address sent by the server.
  • the server can be a DHCP server.
  • the allocating unit 1030 is further configured to send a request message for authenticating the UE to the server having the authentication function before receiving the IP address by using the DHCP server; and receiving the authentication function.
  • the server with the authentication function may be an AAA server, and the RADIUS authentication may be performed on the UE.
  • the user plane gateway may further include a sending unit, configured to send an IP address to the UE or send an IP address to the control plane gateway, so that the control plane gateway sends the IP address to the UE.
  • a sending unit configured to send an IP address to the UE or send an IP address to the control plane gateway, so that the control plane gateway sends the IP address to the UE.
  • FIG. 11 is a schematic block diagram of a user plane gateway 1100 according to an embodiment of the present invention.
  • the control plane gateway shown in FIG. 11 includes a receiver 1110, a processor 1120, a transmitter 1130, a memory 1140, and a system bus 1150.
  • the processor 1120, the memory 1140, the receiver 1110, and the transmitter 1130 are connected by a bus system 1150 for storing instructions, and the processor 1120 is configured to execute instructions stored by the memory 1140 to control the receiver 1110 to receive signals. And controlling the transmitter 1130 to send a signal.
  • the user plane gateway 1100 may correspond to the user plane gateway in the method shown in FIG. 2 and FIG. 3, and may also correspond to the user plane gateway shown in FIG. Specifically, the receiver 1110 corresponds to the receiving unit 1010 in FIG. 10, the processor 1120 corresponds to the determining unit 1010 and the allocating unit 1030 in FIG. 10, and the transmitter 1130 corresponds to the transmitting unit in FIG.
  • the above and other operations and/or functions of the various units in the user plane gateway 1100 of the embodiment of the present invention implement respective processes of the respective methods of FIGS. 2 through 7, respectively. It should be understood that, in the process that the user plane gateway 1100 implements the flow of any one of the methods of FIG. 2 to FIG.
  • the processor 1120 is configured to execute the instruction stored by the memory 1140 to control the receiver 1110 to receive the corresponding method flow.
  • the various messages or messages received by the ingress device and the various messages or messages sent by the access point device in the corresponding method flow are sent by the sender 1130.
  • the sender 1130 For brevity, no further details are provided herein.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one single unit. Yuanzhong.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

La présente invention concerne un procédé d'attribution d'adresse IP, une passerelle de plan de commande et une passerelle de plan utilisateur. Le procédé d'attribution d'adresse IP comprend les étapes suivantes : une passerelle de plan de commande reçoit un premier message de demande envoyé par un équipement d'utilisateur (UE) ; la passerelle de plan de commande détermine, en fonction du premier message de demande, si la passerelle de plan de commande doit attribuer une adresse IP ; si la passerelle de plan de commande détermine d'attribuer une adresse IP, attribuer une adresse IP ; si la passerelle de plan de commande détermine de ne pas attribuer d'adresse IP, envoyer un message à la passerelle de plan utilisateur déclenchant la passerelle de plan utilisateur de sorte à attribuer l'adresse IP et/ou à véhiculer des informations de politique donnant l'instruction à la passerelle de plan utilisateur d'attribuer une adresse IP. La solution technique de la présente invention permet de mettre en œuvre une attribution d'adresse IP dans un réseau où le plan de commande et le plan utilisateur sont séparés.
PCT/CN2016/071247 2016-01-18 2016-01-18 Procédé d'attribution d'adresse de protocole internet (ip), passerelle de plan de commande et passerelle de plan utilisateur Ceased WO2017124231A1 (fr)

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