WO2016044982A1 - 一种移动网络扁平化的实现装置、方法及系统 - Google Patents

一种移动网络扁平化的实现装置、方法及系统 Download PDF

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Publication number
WO2016044982A1
WO2016044982A1 PCT/CN2014/087108 CN2014087108W WO2016044982A1 WO 2016044982 A1 WO2016044982 A1 WO 2016044982A1 CN 2014087108 W CN2014087108 W CN 2014087108W WO 2016044982 A1 WO2016044982 A1 WO 2016044982A1
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Prior art keywords
virtual machine
context information
network device
access network
user equipment
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PCT/CN2014/087108
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English (en)
French (fr)
Inventor
李岩
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华为技术有限公司
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Priority to CN201480033647.2A priority Critical patent/CN105637918B/zh
Priority to PCT/CN2014/087108 priority patent/WO2016044982A1/zh
Publication of WO2016044982A1 publication Critical patent/WO2016044982A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to an apparatus, method and system for implementing a flattening of a mobile network.
  • the system architecture is shown in Figure 1, including: the evolved universal terrestrial radio access network.
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • E-UTRAN for implementing all functions related to the evolution of network wireless
  • the MME is responsible for mobility management of the control plane, including user context information and mobility state management, and assigning Temporary Mobile Subscriber Identity (TMSI).
  • TMSI Temporary Mobile Subscriber Identity
  • S-GW which is a forwarding plane anchor between 3GPP access networks, terminates the interface of E-TURAN;
  • a P-GW which is an interface of a forwarding plane between a 3GPP access network and a non-3GPP access network, and an interface of an external packet data network (PDN);
  • HSS is used to store user subscription information.
  • the MME, S-GW, P-GW, and HSS are usually used as network elements of the core network.
  • the UE accesses the Evolved Packet Core (EPC) and establishes a connection with the external data network as follows:
  • EPC Evolved Packet Core
  • the UE initiates a network attach process.
  • the Evolved Node B selects the MME and forwards the message to the MME.
  • the MME performs authentication and authorization on the UE, and after the authorization is passed, the MME selects a gateway, including The S-GW and the P-GW send a create session request message to the S-GW;
  • the S-GW After receiving the create session request message, the S-GW forwards the message to the P-GW, where the message includes a downlink tunnel identifier and a user plane address allocated by the S-GW to the UE.
  • the P-GW After receiving the create session request message, the P-GW creates user context information for the UE, allocates an Internet Protocol (IP) address, allocates an uplink tunnel identifier to the UE, and returns a session response message to the S- GW;
  • IP Internet Protocol
  • the S-GW After receiving the session creation response message, the S-GW establishes a GPRS Tunneling Protocol (GTP) forwarding plane (GTP User Plane, GTP-U) tunnel between the S-GW and the P-GW and allocates S. - an uplink tunnel identifier of the GW, returning the create session response message to the MME;
  • GTP GPRS Tunneling Protocol
  • GTP-U GTP User Plane
  • the MME sends an initial context setup request message to the eNB, where the message includes other information, such as the security context information of the UE, in addition to the uplink tunnel identifier allocated by the S-GW, parameters (such as an IP address, etc.) sent to the UE.
  • the message includes other information, such as the security context information of the UE, in addition to the uplink tunnel identifier allocated by the S-GW, parameters (such as an IP address, etc.) sent to the UE.
  • a roaming restriction list of the UE for restricting which eNBs the UE moves between), and the like;
  • the radio bearer is established between the eNB and the UE, and the GTP-U tunnel established by the radio bearer and the gateway has a one-to-one correspondence;
  • the eNB returns an initial context setup response message to the MME, where the message includes a downlink tunnel identifier allocated by the eNB.
  • the MME sends a modify bearer message to the S-GW, where the message includes a downlink tunnel identifier allocated by the eNB, and the S-GW establishes a GTP-U tunnel between the S-GW and the eNB, and forms an eNB from the eNB to the S-GW. End-to-end tunnel between P-GWs.
  • the process of forwarding the specific user plane packet is as follows: After receiving the downlink packet of the UE from the external network (such as the Internet), the P-GW first determines the destination IP address according to the destination IP address in the packet. The UE is sent to the UE, and then the IP packet encapsulation GTPU protocol header is sent to the S-GW.
  • the GTPU protocol header includes the IP address of the S-GW, the UDP port number, and the downlink tunnel identifier assigned by the S-GW.
  • the S-GW modifies the tunnel identifier and the destination address of the GTPU protocol header according to the association relationship between the tunnel IDs, and then sends the GTPU packet to the eNB.
  • eNB receives the report After the text, it is determined according to the downlink tunnel identifier, which radio bearer is sent to the UE.
  • the eNB selects the uplink tunnel identifier according to the correspondence between the radio bearer and the GTPU tunnel, and encapsulates the GTPU protocol header, and then sends the GTPU protocol header to the S-GW.
  • the S-GW modifies the tunnel identifier and the destination address of the GTPU protocol header according to the association relationship between the tunnel IDs, and then sends the GTPU packet to the P-GW.
  • the P-GW removes the GTPU encapsulation and sends the packet to the PDN.
  • an end-to-end tunnel is established between the UE and the P-GW, and the UE establishes a wireless connection with the target eNB through the handover preparation and handover execution process.
  • the MME sends a modify bearer request message to the S-GW, where the modify bearer request message includes a downlink tunnel identifier allocated by the target eNB.
  • the S-GW has established a GTP-U tunnel between the S-GW and the target eNB;
  • the S-GW returns a modify bearer response message to the MME.
  • the MME returns a path switch request acknowledgement message to the target eNB.
  • the establishment of a GTP-U tunnel needs to be implemented through the GTP-C protocol, and this protocol is only applicable to EPC network, which leads to S-GW and P-GW can only be customized, and the number of customized gateways is lower than that of general-purpose switches and routers, and because all traffic needs to pass P-GW.
  • the P-GW implementation is complex and increases the deployment cost of the current EPC network.
  • the embodiment of the invention provides a device, a method and a system for implementing a flattening of a mobile network, which realizes a flat mobile network by using a universal network device, and solves the data transmission brought by the centralized data anchor point in the existing mobile network. Not enough optimization, the cost of network equipment is too high.
  • an embodiment of the present invention provides a device for implementing a flattening of a mobile network, including:
  • a first processing unit configured to establish a radio bearer with the user equipment, and generate user equipment context information
  • a first receiving unit configured to receive a remote procedure call instruction sent by a controller of the cloud system for instructing to create a virtual machine
  • the second processing unit is configured to invoke the local management program, create a virtual machine, establish a connection between the virtual machine and the local virtual switch, and generate virtual machine context information, and associate the virtual machine context information with the user equipment context information.
  • the context information of the virtual machine includes a MAC address of the virtual machine.
  • the context information of the virtual machine further includes a maximum bandwidth value of the virtual machine; the maximum broadband value is used to constrain the virtual machine receiving And the maximum bandwidth when sending a message.
  • the remote procedure call instruction includes mirroring information of virtual machine context information on a source access network device, where the mirroring information includes The MAC address of the virtual machine;
  • the second processing unit is specifically configured to:
  • the remote procedure call instruction includes a virtual machine identifier allocated by a core network device
  • the second processing unit is specifically configured to:
  • the virtual machine context information is associated with the user equipment context information according to the virtual machine identifier.
  • the method further includes:
  • a second receiving unit configured to receive, by using a radio bearer, a packet sent by the user equipment
  • a first determining unit configured to determine, according to the user equipment context information corresponding to the radio bearer, and the association relationship between the user equipment context information and the virtual machine context information, the virtual machine corresponding to the user equipment and the MAC address of the virtual machine;
  • An encapsulating unit configured to encapsulate a packet sent by the user equipment by using a MAC address of the virtual machine
  • the first sending unit is configured to send the encapsulated packet to the target device by using the local virtual switch.
  • the method further includes:
  • a third receiving unit configured to receive, by the local virtual switch, a packet sent to the user equipment
  • a second determining unit configured to determine, according to the virtual machine context information corresponding to the MAC address of the packet, and the association relationship between the virtual machine context information and the user equipment context information, the user equipment corresponding to the MAC address of the virtual machine, and the user The radio bearer corresponding to the device context information;
  • Decapsulating unit configured to decapsulate the received message sent to the user equipment
  • a second sending unit configured to send, by using the determined radio bearer, the decapsulated message to the determined user equipment.
  • an embodiment of the present invention provides a device for implementing a flattening of a mobile network, including:
  • An indicating unit configured to instruct the access network device to generate user equipment context information
  • a sending unit configured to send an instruction to a controller of the cloud system, the instruction is used to instruct the controller to remotely invoke a management program of the access network device, create a virtual machine locally on the access network device, generate virtual machine context information, and Associate virtual machine context information with user device context information.
  • the instruction is an application programming interface API instruction
  • the API instruction includes an access network device identifier and a virtual machine identifier.
  • an embodiment of the present invention provides a method for implementing a flattening of a mobile network, including:
  • the access network device establishes a radio bearer with the user equipment, and generates user equipment context information.
  • the access network device receives a remote procedure call instruction sent by a controller of the cloud system for instructing to create a virtual machine
  • the access network device invokes the local management program, creates a virtual machine, establishes a connection between the virtual machine and the local virtual switch, and generates virtual machine context information, and associates the virtual machine context information with the user equipment context information.
  • the context information of the virtual machine includes a media access control layer MAC address of the virtual machine.
  • the context information of the virtual machine further includes a maximum bandwidth value of the virtual machine; the maximum broadband value is used to constrain the virtual machine to receive And the maximum bandwidth when sending a message.
  • the remote procedure call instruction includes mirroring information of virtual machine context information on a source access network device, where the mirroring information includes The MAC address of the virtual machine;
  • Generate context information for the virtual machine including:
  • the remote procedure call instruction includes a virtual machine identifier allocated by a core network device
  • Associating virtual machine context information with user device context information including:
  • the virtual machine context information is associated with the user equipment context information according to the virtual machine identifier.
  • the method further includes:
  • the access network device receives the packet sent by the user equipment by using the radio bearer
  • the access network device determines, according to the user equipment context information corresponding to the radio bearer, and the association relationship between the user equipment context information and the virtual machine context information, the virtual machine corresponding to the user equipment and the MAC address of the virtual machine;
  • the access network device encapsulates the packet sent by the user equipment by using the MAC address of the virtual machine.
  • the access network device sends the encapsulated packet to the target device through the local virtual switch.
  • the method further includes:
  • the access network device receives the packet sent to the user equipment through the local virtual switch.
  • the access network device determines the user equipment corresponding to the MAC address of the virtual machine and the context information of the user equipment according to the virtual machine context information corresponding to the MAC address of the packet and the association between the virtual machine context information and the user equipment context information.
  • Corresponding radio bearer
  • the access network device decapsulates the received packet sent to the user equipment
  • the access network device sends the decapsulated packet to the determined user equipment by using the determined radio bearer.
  • an embodiment of the present invention provides a method for implementing a flattening of a mobile network, including:
  • the core network device instructs the access network device to generate user equipment context information
  • the core network device sends an instruction to the controller of the cloud system, the instruction is used to instruct the controller to remotely invoke the management program of the access network device, create a virtual machine locally on the access network device, generate virtual machine context information, and virtualize Machine context information is associated with user device context information.
  • the instruction is an application programming interface API instruction, where the API instruction includes an access network device identifier and a virtual machine identifier.
  • an embodiment of the present invention provides a system for implementing a flattening of a mobile network, including:
  • a core network device configured to instruct the access network device to generate user equipment context information; send an instruction to a controller of the cloud system, where the instruction is used to instruct the controller to remotely invoke a management program of the access network device, in the access network device Create a virtual machine locally, generate virtual machine context information, and associate virtual machine context information with user equipment context information.
  • An access network device configured to establish a radio bearer with the user equipment, generate user equipment context information, receive a remote procedure call instruction sent by a controller of the cloud system for instructing to create a virtual machine, invoke a local management program, and create a virtual machine, And establishing a connection between the virtual machine and the local virtual switch, and generating virtual machine context information, and associating the virtual machine context information with the user equipment context information.
  • a new mobile network architecture in which a wireless communication system and a cloud system are combined, and the base station integrates functions of a hypervisor and a virtual switch, and a network device such as a physical switch/router and an IP gateway.
  • a tunneling and control panel protocol for existing mobile networks is not required, and a flattened mobile network can be realized by using a generalized network device. All the network connection management in the network is managed by the controller.
  • the UEs and the external data network communicate between the UE and the external data network by encapsulating the MAC address of the virtual machine simulated by the UE. Thereby optimizing the transmission path and improving transmission efficiency.
  • FIG. 1 is a schematic diagram of a system architecture of an evolved network in the prior art
  • FIG. 2 is a flowchart of establishing a network connection by a UE in the prior art
  • FIG. 4 is a structural diagram of a flat mobile network according to an embodiment of the present invention.
  • FIG. 5 is a structural diagram of an apparatus for implementing flattening of a mobile network according to an embodiment of the present invention
  • FIG. 6 is a structural diagram of an apparatus for implementing flattening of a mobile network according to an embodiment of the present invention.
  • FIG. 7 is a structural diagram of an access network device according to an embodiment of the present disclosure.
  • FIG. 8 is a structural diagram of a core network device according to an embodiment of the present disclosure.
  • FIG. 9 is a flowchart of implementing a flattening of a mobile network on an access network device side according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of implementing a flattening of a mobile network on a device side of a core network according to an embodiment of the present invention
  • FIG. 11 is a flowchart of establishing a network connection by a UE in a flat mobile network according to an embodiment of the present disclosure
  • FIG. 12 is a flowchart of handover between base stations of a UE in a flat mobile network according to an embodiment of the present invention.
  • Embodiments of the present invention provide a device, a method, and a system for implementing a flattening of a mobile network, which can implement a flat mobile network by using a generalized network device, thereby solving a problem, a UE, and other UEs or external data in the existing mobile network.
  • the network interacts, the problem that the path transmission caused by the centralized anchor point is not optimized enough and the transmission time is long.
  • the new mobile network architecture includes a controller, a physical switch/router, a physical server, an IP gateway, an MME, an HSS, and an integrated special management program. (Hypervisor) features and virtual switch function base stations, where:
  • the MME in addition to being responsible for mobility management of the control plane, including user context information and mobility state management, and assigning existing functions such as user TMSI, also instructs the controller to create and migrate virtual machines simulated by the UE;
  • the controller creates multiple virtual machines on the base station by interacting with a hypervisor running on the base station;
  • NFV network function virtualization
  • DPI Deep Packet Inspection
  • Cache Cache
  • Firewall Firewall
  • a physical switch/router that implements communication between UEs (UE simulated virtual machines) on different base stations, UEs, and network services (virtual machines on physical servers);
  • HSS which is used to store user subscription information, and has the same functions as existing ones
  • An IP gateway is an interface between a mobile network and an external data network.
  • the network connection management of the new mobile network is managed by the controller.
  • the virtual machines simulated by different UEs on the same base station are connected to the virtual switch of the base station, and the virtual switches on each base station are connected to the physical switch through the network interface of the base station.
  • the physical switch is connected to the IP gateway.
  • communication between different UEs of the same base station is implemented by a virtual switch of the base station; communication between different UEs of different base stations is implemented by physical switches and virtual switches; only when communicating with an external data network, data traffic is required.
  • After the IP gateway This achieves a flat mobile network.
  • an embodiment of the present invention provides a device for implementing a flattening of a mobile network, where the device can be deployed on an access network device, including:
  • the first processing unit 501 is configured to establish a radio bearer with the UE, and generate UE context information.
  • the first receiving unit 502 is configured to receive a remote procedure call instruction sent by a controller of the cloud system for instructing to create a virtual machine.
  • the second processing unit 503 is configured to invoke a local hypervisor, create a virtual machine, establish a connection between the virtual machine and the local virtual switch, and generate virtual machine context information, and associate the virtual machine context information with the UE context information.
  • the context information of the virtual machine includes at least a MAC address of the virtual machine.
  • the context information of the virtual machine may further include a maximum bandwidth value of the virtual machine, where the maximum bandwidth value is used to constrain the maximum bandwidth when the virtual machine receives and sends the message.
  • the first receiving unit 502 on the target access network device includes the mirror information of the virtual machine context information on the source access network device, and the mirror information must include the MAC address of the virtual machine on the source access network device.
  • the second processing unit 503 may generate virtual machine context information according to the mirroring information of the virtual machine context information on the source access network device, and specify the MAC address of the virtual machine as the source access. The MAC address of the virtual machine on the device.
  • the packet forwarded by the source access network device to the target access network device can be automatically received and processed. Thereby the continuity of the communication between the UE and the external data network and other UEs is guaranteed.
  • the remote procedure call instruction sent by the controller includes the virtual machine identifier allocated by the core network device. Therefore, when the virtual machine context information is associated with the UE context information, the second processing unit 503 can associate the virtual machine context information with the UE context information according to the virtual machine identifier.
  • the above device also includes:
  • the second receiving unit 504 is configured to receive, by using a radio bearer, a packet sent by the UE.
  • the first determining unit 505 is configured to determine, according to the UE context information corresponding to the radio bearer, and the association relationship between the UE context information and the virtual machine context information, the virtual machine corresponding to the UE and the MAC address of the virtual machine.
  • the encapsulating unit 506 is configured to encapsulate the packet sent by the UE by using the MAC address of the virtual machine.
  • the first sending unit 507 is configured to send the encapsulated packet to the target device by using the local virtual switch.
  • the above device also includes:
  • the third receiving unit 508 is configured to receive, by the local virtual switch, a packet sent to the UE.
  • the second determining unit 509 is configured to determine, according to the virtual machine context information corresponding to the MAC address of the packet, the association between the virtual machine context information and the UE context information, the UE corresponding to the MAC address of the virtual machine, and the UE context.
  • the radio bearer corresponding to the information.
  • the decapsulation unit 510 is configured to decapsulate the received message sent to the UE.
  • the second sending unit 511 is configured to send the decapsulated message to the determined UE by using the determined radio bearer.
  • a flat mobile network is realized by integrating the functions of the hypervisor and the virtual switch on the access network device.
  • the UEs in the network, between the UE and the external data network, can communicate by encapsulating the MAC address of the virtual machine simulated by the UE, and do not need to carry out centralized anchor points, thereby optimizing the transmission path and improving the transmission efficiency. .
  • an embodiment of the present invention provides a device for implementing a flattening of a mobile network, where the device can be deployed on a core network device, including:
  • the indicating unit 601 is configured to instruct the access network device to generate UE context information.
  • the sending unit 602 is configured to send an instruction to the controller of the cloud system, where the instruction is used to instruct the controller to remotely invoke a management program of the access network device, create a virtual machine locally on the access network device, generate virtual machine context information, and Associate virtual machine context information with user device context information.
  • the instruction is an application programming interface (API) instruction, where the API instruction includes an access network device identifier and a virtual machine identifier; and the access network device identifier is used to specify a location for creating a virtual machine, and the virtual machine identifier Used to associate virtual machine context information with specific UE context information.
  • API application programming interface
  • the UE is configured to remotely invoke the Hypervisor on the access network device to create a virtual machine of the UE, and between the UE and the external data network, the MAC address of the virtual machine simulated by the UE is encapsulated. Communication requires no centralized anchor points, which optimizes the transmission path and improves transmission efficiency.
  • an embodiment of the present invention provides an access network device, including:
  • the processor 701 is configured to establish a radio bearer with the UE, and generate UE context information.
  • the transceiver 702 is configured to receive a remote procedure call instruction sent by a controller of the cloud system for instructing to create a virtual machine.
  • the processor 701 is further configured to invoke a local hypervisor, create a virtual machine, establish a connection between the virtual machine and the local virtual switch, and generate virtual machine context information, and associate the virtual machine context information with the UE context information.
  • the context information of the virtual machine includes at least a MAC address of the virtual machine.
  • the context information of the virtual machine may further include a maximum bandwidth value of the virtual machine, where the maximum bandwidth value is used to constrain the maximum bandwidth when the virtual machine receives and sends the message.
  • the controller received by the transceiver 702 on the target access network device
  • the remote process call instruction sent includes the mirror information of the virtual machine context information on the source access network device, and the mirror information must include the MAC address of the virtual machine on the source access network device.
  • the processor 701 may generate the virtual machine context information according to the mirroring information of the virtual machine context information on the source access network device, and specify the MAC address of the virtual machine as the source access device. The MAC address of the virtual machine.
  • the packet forwarded by the source access network device to the target access network device can be automatically received and processed. Thereby the continuity of the communication between the UE and the external data network and other UEs is guaranteed.
  • the remote procedure call instruction sent by the controller includes the virtual machine identifier allocated by the core network device. Therefore, when the virtual machine context information is associated with the UE context information, the processor 701 can associate the virtual machine context information with the UE context information according to the virtual machine identifier.
  • the transceiver 702 is further configured to receive, by using a radio bearer, a packet sent by the UE.
  • the processor 701 is further configured to: determine a virtual machine corresponding to the UE and a MAC address of the virtual machine according to the UE context information corresponding to the radio bearer, and the association relationship between the UE context information and the virtual machine context information, and use the virtual The MAC address of the machine encapsulates the packet sent by the UE.
  • the transceiver 702 is further configured to send the encapsulated message to the target device by using the local virtual switch.
  • the transceiver 702 is further configured to receive, by the local virtual switch, a packet sent to the UE.
  • the processor 701 is further configured to: determine, according to the virtual machine context information corresponding to the MAC address of the packet, and the association relationship between the virtual machine context information and the UE context information, the UE corresponding to the MAC address of the virtual machine and the UE context information. Corresponding radio bearers, and decapsulating received packets destined for the UE.
  • the transceiver 702 is further configured to send, by using the determined radio bearer, the decapsulated message to the determined UE.
  • an access network device integrating the functions of the hypervisor and the virtual switch is provided, and a flat mobile network is realized.
  • the UEs in the network, between the UE and the external data network, can communicate by encapsulating the MAC address of the virtual machine simulated by the UE, and do not need to carry out centralized anchor points, thereby optimizing the transmission path and improving the transmission efficiency. .
  • an embodiment of the present invention provides a core network device, including:
  • the processor 801 is configured to instruct the access network device to generate UE context information.
  • the transceiver 802 is configured to send an instruction to a controller of the cloud system, where the instruction is used to instruct the controller to remotely invoke a management program of the access network device, create a virtual machine locally on the access network device, generate virtual machine context information, and Associate virtual machine context information with user device context information.
  • the above instruction is an application programming interface API instruction, where the API instruction includes an access network device identifier and a virtual machine identifier; the access network device identifier is used to specify a location for creating a virtual machine, and the virtual machine identifier is used to use a virtual machine context.
  • the association of information with specific UE context information is used to specify a location for creating a virtual machine.
  • the core network device is used to instruct the controller to remotely invoke the hypervisor on the access network device to create a virtual machine simulated by the UE, in addition to the existing functions such as the mobility management of the control plane.
  • the communication between the UE and the external data network is performed by encapsulating the MAC address of the virtual machine simulated by the UE, and the centralized anchor point is not needed, thereby optimizing the transmission path and improving the transmission efficiency.
  • the access network device side of the wireless communication system is locally created.
  • the process of building a virtual machine that simulates the UE and implementing the flattening of the mobile network is as follows:
  • the access network device establishes a radio bearer with the UE, and generates UE context information.
  • the access network device receives, by the controller of the cloud system, a remote procedure call instruction for instructing to create a virtual machine.
  • the access network device invokes the local hypervisor, creates a virtual machine, establishes a connection between the virtual machine and the local virtual switch, and generates virtual machine context information, and associates the virtual machine context information with the UE context information.
  • the virtual machine context information generated in the S903 includes at least the MAC address of the virtual machine, and the virtual machine context information may further include a maximum bandwidth value of the virtual machine, where the maximum bandwidth value is used to constrain the virtual machine to receive and send the message. Maximum bandwidth.
  • the Hypervisor running on the access network device does not allocate computing and memory resources to the created virtual machine, but only establishes a virtual network card of the local virtual machine, and Specify the MAC address of the virtual NIC, establish a connection between the virtual NIC and the local virtual switch, connect the local virtual machine to the local virtual switch, and configure the virtual switch and the physical switch/router to establish the virtual machine to other virtual machine/network services. Connection to an external data network.
  • the communication between the virtual machines on the same access network device can be implemented by the local virtual switch of the access network device; the communication between the virtual machines on different access network devices, and the access network device
  • the communication between the virtual machine on the virtual machine and the virtual machine on the physical server is realized by the virtual switch of the access network device, the physical switch, and the virtual switch on the physical server; between the virtual machine on the access network device and the external data network
  • the communication is implemented by a virtual switch, a physical switch, and an IP gateway on the access network device.
  • the remote process sent by the controller received by the target access network device will include the mirroring information of the virtual machine context information on the source access network device, and the mirroring information must contain the MAC address of the virtual machine on the source access network device.
  • the hypervisor on the target access network device generates the context information of the local virtual machine according to the mirroring information of the virtual machine context information on the source access network device, and determines the source access network setting according to the mirroring information.
  • MAC address of the standby virtual machine specifying the MAC address of the local virtual machine as the MAC address of the virtual machine on the source access device.
  • the packet forwarded by the source access network device to the target access network device can be automatically received and processed. Thereby the continuity of the communication between the UE and the external data network and other UEs is guaranteed.
  • the remote procedure call instruction sent by the controller includes the virtual machine identifier allocated by the core network device, and according to the virtual machine identifier, The network access device can associate the local virtual machine context information with the specified UE context information.
  • Each UE has a unique virtual machine on the access network device, and each virtual machine has a unique virtual machine identifier and MAC address.
  • the virtual machine context information and the UE context information are associated, and the subsequent access network device may receive the message sent by the UE by using the radio bearer, and then according to the UE context information corresponding to the radio bearer, and the UE context information and the virtual machine context information.
  • the association relationship between the virtual machine corresponding to the virtual machine and the MAC address of the virtual machine, and the MAC address of the virtual machine is used to encapsulate the packet sent by the UE, and then the encapsulated packet is sent to the local virtual switch through the local virtual switch.
  • Target device is used to encapsulate the packet sent by the UE, and then the encapsulated packet is sent to the local virtual switch through the local virtual switch.
  • the access network device determines, according to the virtual machine context information corresponding to the MAC address of the packet, and the association relationship between the virtual machine context information and the user equipment context information.
  • a new mobile network architecture which combines a wireless communication system and a cloud system.
  • the base station integrates the functions of a hypervisor and a virtual switch, and the network devices such as physical switches/routers and IP gateways do not.
  • a tunneling and control panel protocol for existing mobile networks is required, and a flattened mobile network can be realized by using a generalized network device. All the network connection management in the network is managed by the controller.
  • the UEs and the external data network communicate between the UE and the external data network by encapsulating the MAC address of the virtual machine simulated by the UE. Thereby optimizing the transmission path and improving transmission efficiency.
  • the core network device of the wireless communication system notifies the cloud management platform to create a virtual machine, and the process of flattening the mobile network is as follows:
  • the core network device instructs the access network device to generate UE context information.
  • the core network device sends an instruction to the controller of the cloud system, where the instruction is used to instruct the controller to remotely invoke the Hypervisor of the access network device, create a virtual machine locally on the access network device, generate virtual machine context information, and virtualize The machine context information is associated with the UE context information.
  • the above instruction is an API instruction, where the API instruction includes an access network device identifier and a virtual machine identifier, and the access network device identifier is used to specify a location for creating a virtual machine, and the virtual machine identifier is used to set virtual machine context information and specific Association of UE context information.
  • a new mobile network architecture which combines a wireless communication system and a cloud system.
  • the core network device is also used to indicate The controller remotely invokes the Hypervisor on the access network device to create a virtual machine simulated by the UE. All the network connection management in the network is managed by the controller.
  • the UEs and the external data network communicate between the UE and the external data network by encapsulating the MAC address of the virtual machine simulated by the UE. Thereby optimizing the transmission path and improving transmission efficiency.
  • the embodiment of the present invention introduces a process in which a UE accesses a wireless network and establishes a connection with an external data network.
  • the specific process is as follows:
  • S1101 The UE initiates a network attach procedure.
  • the eNB After receiving the message, the eNB selects the MME and forwards the message to the MME, where the message forwarded by the eNB to the MME includes the identifier eNB UE ID allocated by the eNB for the UE;
  • the HSS returns the subscription information to the MME
  • the MME sends an initial context setup request message to the eNB, where the message includes other information, such as security context information of the UE, in addition to the attach accept message sent to the UE.
  • the MME UE ID and the eNB UE ID pair are used to uniquely determine which UE the message is for. It should be noted that under the new mobile network architecture, this message does not need to contain bearer context information, that is, the tunnel ID assigned by the gateway.
  • the MME sends an API instruction for creating a virtual machine to the controller, where the API instruction includes a base station identifier and a virtual machine identifier.
  • the base station identifier is used to specify a location for creating a virtual machine, and the virtual machine identifier is used by the subsequent base station to associate the virtual machine context information with the specific UE context information, where the virtual machine identifier may include the MME UE allocated by the MME to the UE in S705. ID.
  • the controller sends a remote procedure call instruction to the eNB, instructing the eNB to invoke a local hypervisor to create a virtual machine.
  • the Hypervisor running on the eNB creates a virtual machine locally, but does not allocate computing and memory resources to the virtual machine, but only creates a virtual network card of the virtual machine, and specifies the virtual network card.
  • the MAC address establishes a connection between the virtual network card and the virtual switch.
  • the MAC address of the virtual network card can be allocated by the hypervisor or by the controller.
  • the hypervisor generates the virtual machine context information, and associates the virtual machine context information with the UE context information generated in S1105, and can be associated by using the virtual machine identifier.
  • the virtual machine context information generated by the hypervisor includes at least the MAC address of the virtual machine, and the virtual machine context information may further include a maximum bandwidth value of the virtual machine, where the maximum bandwidth value is used to constrain the virtual machine to receive and send the message. Maximum bandwidth.
  • the UE has established a connection with the external data network.
  • S1109 The virtual machine initiates an IP address allocation process.
  • the UE can further communicate with other UEs in the network, network services (virtual machines on the physical server), and external data networks using the assigned IP address.
  • network services virtual machines on the physical server
  • external data networks using the assigned IP address.
  • the packet processing process is as follows: after the eNB receives the packet sent by the UE by using the radio bearer, The packet sent by the virtual machine simulated by the UE may be sent to the network through the virtual switch.
  • the specific encapsulation is the UE context information corresponding to the radio bearer after receiving the packet sent by the UE by using the radio bearer, and the UE.
  • the association between the context information and the virtual machine context information determines the virtual machine corresponding to the UE and the MAC address of the virtual machine, and then uses the MAC address to encapsulate the packet and send it to the network.
  • the eNB needs to decapsulate the packet and send it to the UE through the radio bearer.
  • the specific decapsulation is the virtual machine corresponding to the MAC address of the packet after receiving the packet sent by the network.
  • the context information, and the association relationship between the virtual machine context information and the UE context information determine the UE corresponding to the MAC address of the virtual machine and the radio bearer corresponding to the UE context information, and then decapsulate the MAC address of the packet, and then decapsulate the MAC address of the packet. Send to the UE.
  • the MME and the eNB are modified, and the wireless communication system and the cloud system are combined to implement a new mobile network, and the UE interacts with other UEs or external data networks in the existing mobile network.
  • the problem that the path transmission caused by the centralized anchor point is not optimized enough and the transmission time is long.
  • the embodiment of the present invention introduces a process for the UE to switch from one base station to another due to mobility.
  • the specific process is as follows:
  • the UE Before the handover, the UE establishes a connection with the external data network, and the establishment process refers to Embodiment 3. Subsequently, through the handover preparation and handover execution process, the UE establishes a wireless connection with the target eNB.
  • the source eNB and the target eNB exchange UE context information.
  • the UE context information does not include bearer context information, that is, the tunnel ID assigned by the gateway. And other information.
  • the UE context information that is transmitted by the source eNB to the target eNB includes the MME UE ID allocated by the MME, and may be used by the MME to identify which UE initiated the handover procedure.
  • the MME sends an API instruction for migrating a virtual machine to the controller, where the API instruction includes a target base station identifier and a virtual machine identifier.
  • the target base station identifier is used to specify a virtual machine creation location after the migration, and the virtual machine identifier is used by the subsequent target base station to associate the virtual machine context information with the specific UE context information, where the virtual machine identifier may include the source eNB during the handover preparation process.
  • the MME UE ID passed to the target eNB.
  • the controller sends a remote procedure call instruction to the target eNB, instructing the target eNB to invoke a local hypervisor to create a virtual machine.
  • the remote procedure call instruction further includes the mirroring information of the virtual machine context information simulated by the UE on the source eNB, where the mirroring information of the virtual machine context information includes at least the MAC address of the virtual machine simulated by the UE on the source eNB.
  • the Hypervisor running on the eNB After receiving the remote procedure call instruction, the Hypervisor running on the eNB locally creates a virtual machine, and generates local virtual machine context information according to the mirror information of the virtual machine context information of the source eNB, where the virtual machine context information is at least The MAC address of the virtual machine is included, and the virtual machine context information may further include a maximum bandwidth value of the virtual machine, where the maximum bandwidth value is used to limit the maximum bandwidth when the virtual machine receives and sends the message.
  • the Hypervisor specifies that the MAC address of the local virtual machine is the MAC address of the virtual machine on the source eNB, and establishes a connection between the virtual network card of the virtual machine and the virtual switch.
  • the hypervisor associates the generated virtual machine context information with the UE context information that the source eNB delivers to the target eNB during the handover preparation process, and may be associated by using the virtual machine identifier.
  • S1205 The controller instructs the physical switch/router to modify the forwarding entry.
  • the controller may implement the update of the forwarding entry of the physical switch/router through a programmable interface between the physical switch/router or a distributed routing protocol, thereby transmitting the report to the virtual machine on the source eNB.
  • the text is forwarded to the virtual machine on the target eNB. Since the virtual machine on the target eNB retains the same MAC address as the virtual machine on the source eNB, the message can be automatically received and processed, ensuring session continuity of communication between the UE and the external data network and other UEs.
  • the process of receiving and transmitting the message for the UE by the target eNB is as follows: after receiving the packet sent by the UE by using the radio bearer, the target eNB may encapsulate the packet sent by the virtual machine simulated by the UE. The packet is sent to the network through the virtual switch. After receiving the packet sent by the UE, the specific encapsulation is determined according to the UE context information corresponding to the radio bearer and the association relationship between the UE context information and the virtual machine context information. The virtual machine corresponding to the UE and the MAC address of the virtual machine, and then use the MAC address to encapsulate the outer layer of the packet and send it to the network.
  • the target eNB After receiving the packet sent by the network to the UE, the target eNB needs to perform decapsulation and then send the packet to the UE through the radio bearer.
  • the specific decapsulation is the virtual corresponding to the MAC address of the packet after receiving the packet sent by the network.
  • the machine context information, and the association relationship between the virtual machine context information and the UE context information determine the UE corresponding to the MAC address of the virtual machine and the radio bearer corresponding to the UE context information, and then decapsulate the MAC address of the packet. Then send it to the UE.
  • the target eNB notifies the source eNB to release the radio resource.
  • the source eNB After receiving the notification, the source eNB releases the local UE context information.
  • the controller sends a remote procedure call instruction to the source eNB, instructing the source eNB to invoke the local hypervisor to delete the virtual machine.
  • the hypervisor running on the source eNB After receiving the remote procedure call instruction, the hypervisor running on the source eNB deletes the corresponding local virtual machine according to the virtual machine identifier of the virtual machine to be deleted included in the instruction, and releases the corresponding local virtual machine context information.
  • the MME of the wireless communication system notifies the controller of the cloud system to generate a virtual machine migration event, and the cloud computing control system ensures the UE by creating a virtual machine on the new base station and re-adjusting the network connection.
  • the session continuity of the communication between the external data network and other UEs does not require centralized anchor points during the entire handover process, thereby optimizing the transmission path and improving transmission efficiency.
  • An embodiment of the present invention provides a system for implementing a flattening of a mobile network, where the system includes:
  • a core network device configured to instruct the access network device to generate UE context information; send an instruction to a controller of the cloud system, where the instruction is used to instruct the controller to remotely invoke a management program of the access network device, locally at the access network device Create a virtual machine, generate virtual machine context information, and associate virtual machine context information with user device context information.
  • An access network device configured to establish a radio bearer with the UE, generate UE context information, receive a remote procedure call instruction sent by a controller of the cloud system for instructing to create a virtual machine, invoke a local management program, create a virtual machine, and establish The virtual machine is connected to the local virtual switch, and generates virtual machine context information, and associates the virtual machine context information with the UE context information.
  • the instruction sent by the core network device to the controller is an API instruction, where the API instruction includes an access network device identifier and a virtual machine identifier.
  • the access network device identity is used to specify a location for creating a virtual machine, and the virtual machine identity is used to associate virtual machine context information with specific UE context information.
  • the context information of the virtual machine generated by the access network device includes at least the MAC address of the virtual machine.
  • the context information of the virtual machine may further include a maximum bandwidth value of the virtual machine, where the maximum bandwidth value is used to constrain the maximum bandwidth when the virtual machine receives and sends the message.
  • the remote process sent by the controller received by the target access network device includes the mirroring information of the virtual machine context information on the source access network device, and the mirroring information must include the MAC address of the virtual machine on the source access network device.
  • the target access network device may generate virtual machine context information according to the mirroring information of the virtual machine context information on the source access network device, and specify the MAC address of the virtual machine as the source access. The MAC address of the virtual machine on the device.
  • the packet forwarded by the source access network device to the target access network device can be automatically received and processed. Thereby the continuity of the communication between the UE and the external data network and other UEs is guaranteed.
  • the remote procedure call instruction sent by the controller includes the virtual machine identifier allocated by the core network device. Therefore, when the virtual machine context information is associated with the UE context information, the access network device can associate the virtual machine context information with the UE context information according to the virtual machine identifier.
  • the access network device may be further configured to: receive, by the radio bearer, a packet sent by the UE, and determine, according to the UE context information corresponding to the radio bearer, and the association relationship between the UE context information and the virtual machine context information, determine the virtuality corresponding to the UE.
  • Machine and the MAC address of the virtual machine and use the The MAC address of the virtual machine encapsulates the packet sent by the UE. Finally, the encapsulated packet is sent to the target device through the local virtual switch.
  • the access network device may be further configured to: receive, by the local virtual switch, a packet sent to the UE, and according to the virtual machine context information corresponding to the MAC address of the packet, and the association relationship between the virtual machine context information and the UE context information, And determining, by the UE corresponding to the MAC address of the virtual machine, the radio bearer corresponding to the UE context information, and decapsulating the received packet sent to the UE, and finally sending the decapsulated packet to the determined radio bearer.
  • a new mobile network architecture in which the wireless communication system and the cloud system are combined, and the access network device integrates the functions of the hypervisor and the virtual switch, and the core network device is responsible for the control plane.
  • the controller In addition to existing functions such as mobility management, it is also used to instruct the controller to remotely invoke the Hypervisor on the access network device to create a virtual machine simulated by the UE. All network connection management in the network is managed by the controller.
  • the communication between the UE and the external data network is performed by encapsulating the MAC address of the virtual machine simulated by the UE, and the centralized anchor point is not needed, thereby optimizing the transmission path and improving the transmission efficiency.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明提供了一种移动网络扁平化的实现装置、方法及系统，可以利用通用化的网络设备实现了扁平化的移动网络，从而优化了传输路径，提高了传输效率。本发明接入网设备侧的方法包括：接入网设备与用户设备建立无线承载，生成用户设备上下文信息；接入网设备接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；接入网设备调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与用户设备上下文信息进行关联。

Description

一种移动网络扁平化的实现装置、方法及系统 技术领域
本发明涉及移动通信技术领域，尤其涉及一种移动网络扁平化的实现装置、方法及系统。
背景技术
在第三代移动通信标准化组织(3rd Generation Partnership Project，3GPP)标准版本R8阶段，发展出了一种全新的演进网络，其系统架构如图1所示，包括：演进的通用陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，E-UTRAN)，移动性管理实体(Mobility Management Entity，MME)，服务网关(Serving Gateway，S-GW)，分组数据网络网关(Packet Data Network Gateway，P-GW)和归属用户服务器(Home Subscriber Server，HSS)，其中
E-UTRAN，用于实现所有与演进网络无线有关的功能；
MME，负责控制面的移动性管理，包括用户上下文信息和移动状态管理、分配用户临时身份标识(Temporary Mobile Subscriber Identity，TMSI)等；
S-GW，是3GPP接入网络间的转发面锚点，终止E-TURAN的接口；
P-GW，是3GPP接入网络和非3GPP接入网络之间的转发面锚点，和外部分组数据网络(Packet Data Network，PDN)的接口；
HSS，用于存储用户签约信息。
MME、S-GW、P-GW和HSS通常作为核心网的网元。
参阅图2所示，基于上述演进网络的系统架构中，UE接入演进型分组核心网(Evolved Packet Core，EPC)，并和外部数据网络建立连接的流程如下：
S201、UE发起网络附着流程；
S202、演进节点B(Evolved Node B，eNB)收到该消息后，选择MME并转发该消息给MME；
S203、MME对该UE进行认证授权，授权通过后，MME选择网关，包括 S-GW和P-GW，向S-GW发送创建会话请求消息；
这里省略了和HSS的交互过程。
S204、S-GW收到该创建会话请求消息后，向P-GW转发该消息，其中，该消息包含了S-GW为该UE分配的下行隧道标识和用户面地址；
S205、P-GW收到该创建会话请求消息后，为该UE创建用户上下文信息，分配互联网协议(Internet Protocol，IP)地址，并为该UE分配上行隧道标识，返回创建会话响应消息给S-GW；
S206、S-GW收到该创建会话响应消息后，建立S-GW和P-GW之间的GPRS隧道协议(GPRS Tunnelling Protocol，GTP)转发面(GTP User Plane，GTP-U)隧道并分配S-GW的上行隧道标识，向MME返回该创建会话响应消息；
S207、MME向eNB发起初始上下文建立请求消息，该消息除了包含S-GW分配的上行隧道标识、发送给UE的参数(如IP地址等)外，还包含其他信息，如UE的安全上下文信息(用于eNB和UE之间的无线传输加密)，UE的漫游限制列表(用于限制UE在哪些eNB之间移动)等；
S208、eNB和UE之间建立无线承载，无线承载和网关建立的GTP-U隧道有一一对应关系；
S209、eNB向MME返回初始上下文建立应答消息，该消息包含eNB分配的下行隧道标识；
S210、MME向S-GW发送修改承载消息，该消息包含eNB分配的下行隧道标识，至此S-GW建立了S-GW和eNB之间的GTP-U隧道，形成了从eNB到S-GW到P-GW之间的端到端隧道。
UE接入EPC网络后，具体的用户面报文转发的流程如下：当P-GW从外部网络(如Internet)收到UE的下行报文后，首先根据报文里的目的IP地址，确定该报文发往哪个UE，然后将IP报文封装GTPU协议头发送给S-GW，该GTPU协议头包含了S-GW的IP地址、UDP端口号以及S-GW分配的下行隧道标识。S-GW从对应的下行隧道收到该报文后，根据隧道ID之间的关联关系，修改GTPU协议头的隧道标识和目的地址，然后向eNB发送GTPU报文。eNB收到报 文后，根据下行隧道标识确定从哪个无线承载发送给UE。
在上行方向上，eNB收到UE发送的报文后，根据无线承载和GTPU隧道的对应关系，选择上行隧道标识，并封装GTPU协议头，然后发送给S-GW。S-GW从对应的上行隧道收到报文后，根据隧道ID之间的关联关系，修改GTPU协议头的隧道标识和目的地址，然后向P-GW发送GTPU报文。P-GW在收到报文后，去除GTPU封装，将报文发送到PDN。
参阅图3所示，由于UE的移动性，当UE从一个eNB切换到另一个eNB时，其基本流程如下：
在切换前，UE和P-GW之间建立了端到端隧道，后续通过切换准备和切换执行过程，UE与目标eNB建立了无线连接。
S301、目标eNB与UE建立无线连接后，指示MME进行路径切换，其中，路径切换请求消息中携带了目标eNB的下行隧道标识和用户面地址；
S302、MME向S-GW发送修改承载请求消息，该修改承载请求消息包含了目标eNB分配的下行隧道标识；
至此S-GW已经建立了S-GW和目标eNB之间的GTP-U隧道；
S303、S-GW返回修改承载响应消息给MME；
S304、MME返回路径切换请求确认消息给目标eNB。
需要说明的是，还有UE在eNB间的切换还涉及很多其他切换流程，比如S-GW切换，其他切换流程可参考现有技术，这里不再赘述。
从上述S201-S210、S301-S304两个流程可以看出，现有的移动网络中，UE和PDN之间通过端到端GTP_U隧道实现连接，而UE的移动性则需要通过修改GTP-U隧道的标识来实现。这导致了以下两个问题：
第一、UE的所有数据都必须通过P-GW，UE和其他UE或者部署于P-GW和基站之间的其他业务交互时(比如部署在S-GW附近的业务)，都需要经过集中的锚点，路径传输不够优化，导致传输时间长，用户体验差，造成不必要的网络传输资源的浪费。
第二、建立GTP-U隧道需要通过GTP-C协议实现，而这个协议只适用于 EPC网络，导致S-GW和P-GW只能定制化实现，而定制化的网关由于数量少，其成本要高于通用的交换机和路由器，另外由于所有流量都需要经过P-GW，也使得P-GW实现复杂，提高了目前EPC网络的部署成本。
发明内容
本发明实施例提供了一种移动网络扁平化的实现装置、方法及系统，利用通用化的网络设备实现扁平化的移动网络，解决了现有移动网络中集中的数据锚点带来的数据传输不够优化，网络设备成本过高的问题。
第一方面，本发明实施例提供一种移动网络扁平化的实现装置，包括：
第一处理单元，用于与用户设备建立无线承载，生成用户设备上下文信息；
第一接收单元，用于接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；
第二处理单元，用于调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与用户设备上下文信息进行关联。
结合第一方面，在第一种可能的实现方式中，所述虚拟机的上下文信息包括虚拟机的MAC地址。
结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中，所述虚拟机的上下文信息还包括虚拟机的最大带宽值；所述最大宽带值用于约束虚拟机接收和发送报文时的最大带宽。
结合第一方面，在第三种可能的实现方式中，所述远端过程调用指令包括源接入网设备上的虚拟机上下文信息的镜像信息；所述镜像信息包括源接入网设备上的虚拟机的MAC地址；
在生成虚拟机的上下文信息时，所述第二处理单元具体用于：
根据所述源接入网设备上的虚拟机上下文信息的镜像信息，生成虚拟机上下文信息，并指定虚拟机的MAC地址为所述源接入设备上的虚拟机的 MAC地址。
结合第一方面，在第四种可能的实现方式中，所述远端过程调用指令包括核心网设备分配的虚拟机标识；
在将虚拟机上下文信息与用户设备上下文信息进行关联时，所述第二处理单元具体用于：
根据所述虚拟机标识，将虚拟机上下文信息与用户设备上下文信息进行关联。
结合第一方面或第一方面的第三种可能的实现方式，在第五种可能的实现方式中，还包括：
第二接收单元，用于通过无线承载接收用户设备发送的报文；
第一确定单元，用于根据该无线承载对应的用户设备上下文信息，以及该用户设备上下文信息和虚拟机上下文信息的关联关系，确定该用户设备对应的虚拟机以及该虚拟机的MAC地址；
封装单元，用于使用该虚拟机的MAC地址对用户设备发送的报文进行封装；
第一发送单元，用于通过本地虚拟交换机将封装后的报文发送至目标设备。
结合第一方面或第一方面的第三种可能的实现方式，在第六种可能的实现方式中，还包括：
第三接收单元，用于通过本地虚拟交换机接收发往用户设备的报文；
第二确定单元，用于根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和用户设备上下文信息的关联关系，确定该虚拟机的MAC地址对应的用户设备以及该用户设备上下文信息对应的无线承载；
解封装单元，用于将接收的发往用户设备的报文解封装；
第二发送单元，用于通过确定的该无线承载将解封装后的报文发送至确定的用户设备。
第二方面，本发明实施例提供一种移动网络扁平化的实现装置，包括：
指示单元，用于指示接入网设备生成用户设备上下文信息；
发送单元，用于发送一指令至云系统的控制器，所述指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联。
结合第二方面，在第一种可能的实现方式中，所述指令为应用程序编程接口API指令，所述API指令包括接入网设备标识和虚拟机标识。
第三方面，本发明实施例提供一种移动网络扁平化的实现方法，包括：
接入网设备与用户设备建立无线承载，生成用户设备上下文信息；
接入网设备接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；
接入网设备调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与用户设备上下文信息进行关联。
结合第三方面，在第一种可能的实现方式中，所述虚拟机的上下文信息包括虚拟机的介质访问控制层MAC地址。
结合第三方面的第一种可能的实现方式，在第二种可能的实现方式中，所述虚拟机的上下文信息还包括虚拟机的最大带宽值；所述最大宽带值用于约束虚拟机接收和发送报文时的最大带宽。
结合第三方面，在第三种可能的实现方式中，所述远端过程调用指令包括源接入网设备上的虚拟机上下文信息的镜像信息；所述镜像信息包括源接入网设备上的虚拟机的MAC地址；
生成虚拟机的上下文信息，包括：
根据所述源接入网设备上的虚拟机上下文信息的镜像信息，生成虚拟机上下文信息，并指定虚拟机的MAC地址为所述源接入设备上的虚拟机的MAC地址。
结合第三方面，在第四种可能的实现方式中，所述远端过程调用指令包括核心网设备分配的虚拟机标识；
将虚拟机上下文信息与用户设备上下文信息进行关联，包括：
根据所述虚拟机标识，将虚拟机上下文信息与用户设备上下文信息进行关联。
结合第三方面或第三方面的第三种可能的实现方式，在第五种可能的实现方式中，还包括：
接入网设备通过无线承载接收用户设备发送的报文；
接入网设备根据该无线承载对应的用户设备上下文信息，以及该用户设备上下文信息和虚拟机上下文信息的关联关系，确定该用户设备对应的虚拟机以及该虚拟机的MAC地址；
接入网设备使用该虚拟机的MAC地址对用户设备发送的报文进行封装；
接入网设备通过本地虚拟交换机将封装后的报文发送至目标设备。
结合第三方面或第三方面的第三种可能的实现方式，在第六种可能的实现方式中，还包括：
接入网设备通过本地虚拟交换机接收发往用户设备的报文；
接入网设备根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和用户设备上下文信息的关联关系，确定该虚拟机的MAC地址对应的用户设备以及该用户设备上下文信息对应的无线承载；
接入网设备将接收的发往用户设备的报文解封装；
接入网设备通过确定的该无线承载将解封装后的报文发送至确定的用户设备。
第四方面，本发明实施例提供一种移动网络扁平化的实现方法，包括：
核心网设备指示接入网设备生成用户设备上下文信息；
核心网设备发送一指令至云系统的控制器，所述指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联。
结合第四方面，在第一种可能的实现方式中，所述指令为应用程序编程接口API指令，所述API指令包括接入网设备标识和虚拟机标识。
第五方面，本发明实施例提供一种移动网络扁平化的实现系统，包括：
核心网设备，用于指示接入网设备生成用户设备上下文信息；发送一指令至云系统的控制器，所述指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联；
接入网设备，用于与用户设备建立无线承载，生成用户设备上下文信息；接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与用户设备上下文信息进行关联。
本发明实施例中，给出了一种新的移动网络架构，该架构中将无线通信系统和云系统相结合，基站集成了Hypervisor和虚拟交换机的功能，物理交换机/路由器、IP网关等网络设备不需要现有移动网络的隧道封装和控制面板协议，利用通用化的网络设备便可实现扁平化的移动网络。网络中所有的网路连接管理由控制器统一管理，UE之间、UE与外部数据网络之间，通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
附图说明
图1为现有技术下演进网络的系统架构示意图；
图2为现有技术下UE建立网络连接的流程图；
图3为现有技术下UE的基站间切换的流程图；
图4为本发明实施例提供的一种扁平化移动网络的架构图；
图5为本发明实施例提供的一种移动网络扁平化的实现装置结构图；
图6为本发明实施例提供的一种移动网络扁平化的实现装置结构图；
图7为本发明实施例提供的一种接入网设备的结构图；
图8为本发明实施例提供的一种核心网设备的结构图；
图9为本发明实施例提供的一种接入网设备侧实现移动网络扁平化的流程图；
图10为本发明实施例提供的一种核心网设备侧实现移动网络扁平化的流程图；
图11为本发明实施例提供的一种扁平化移动网络中UE建立网络连接的流程图；
图12为本发明实施例提供的一种扁平化移动网络中UE的基站间切换的流程图。
具体实施方式
本发明实施例提供了一种移动网络扁平化的实现装置、方法及系统，可以利用通用化的网络设备实现扁平化的移动网络，进而解决现有的移动网络中，UE和其他UE或者外部数据网络交互时均需要集中的锚点带来的路径传输不够优化、传输时间长的问题。
本发明实施例提出了一种新的移动网络架构，参阅图4所示，新的移动网络架构包括了控制器，物理交换机/路由器，物理服务器，IP网关，MME，HSS以及集成了特殊管理程序(Hypervisor)功能和虚拟交换机功能的基站，其中：
MME，除了负责控制面的移动性管理，包括用户上下文信息和移动状态管理，分配用户TMSI等现有功能外，还要指示控制器创建和迁移UE模拟的虚拟机；
集成特殊Hypervisor功能和虚拟交换机功能的基站，除了完成现有移动网络里的无线接入功能外，还需要根据控制器的指示创建UE模拟的虚拟机；
控制器，通过和基站上运行的Hypervisor交互，在基站上创建多个虚拟机；
物理服务器，新的移动网络架构中可选的网元设备，其上可运行多个虚拟机，虚拟机完成一些网络功能虚拟化(Network Function Virtualization，NFV) 定义的一些网络服务功能，如深度报文检测(Deep Packet Inspection，DPI)，缓存(Cache)，防火墙(Firewall)等；
物理交换机/路由器，实现不同基站上的UE(UE模拟的虚拟机)之间、UE和网络服务(物理服务器上的虚拟机)之间的通信；
HSS，用于存储用户签约信息，和现有功能相同；
IP网关，是移动网络和外部数据网络的接口。
新移动网络的网络连接管理由控制器统一管理，同一个基站上的不同UE模拟的虚拟机均连接到该基站的虚拟交换机上，各个基站上的虚拟交换机通过基站的网络接口连接到物理交换机，物理交换机连接到IP网关。如此，同一个基站的不同UE之间的通信，通过基站的虚拟交换机实现；不同基站的不同UE之间的通信，通过物理交换机和虚拟交换机实现；只有和外部数据网络通信时，数据流量才需要经过IP网关。这样就实现了一种扁平化的移动网络。
下面结合说明书附图和各实施例对本发明技术方案进行说明。
实施例一
如图5所示，本发明实施例提供了一种移动网络扁平化的实现装置，该装置可部署在接入网设备上，包括：
第一处理单元501，用于与UE建立无线承载，生成UE上下文信息。
第一接收单元502，用于接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令。
第二处理单元503，用于调用本地Hypervisor，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与UE上下文信息进行关联。
其中，上述虚拟机的上下文信息至少包括了虚拟机的MAC地址。
并且，虚拟机的上下文信息还可以包括虚拟机的最大带宽值，该最大宽带值用于约束虚拟机接收和发送报文时的最大带宽。
特别的，当UE并不是初次接入无线网络，而是在无线网络内从一个接入网设备切换到另一个接入网设备，那么目标接入网设备上的第一接收单元502 接收到的控制器发送的远端过程调用指令中会包含源接入网设备上的虚拟机上下文信息的镜像信息，该镜像信息一定包含了源接入网设备上的虚拟机的MAC地址。那么，在生成虚拟机的上下文信息时，第二处理单元503可以根据源接入网设备上的虚拟机上下文信息的镜像信息，生成虚拟机上下文信息，并指定虚拟机的MAC地址为源接入设备上的虚拟机的MAC地址。由于目标接入网设备上的虚拟机保留了与源接入网设备上的虚拟机相同的MAC地址，所以可以自动接收和处理由源接入网设备转发到目标接入网设备的报文，从而保证了UE和外部数据网络以及其他UE之间通信的会话连续性。
为了保证能够将接入网设备上的虚拟机上下文信息与特定的UE上下文相关联，控制器发送的远端过程调用指令中包括了核心网设备分配的虚拟机标识。因此，在将虚拟机上下文信息与UE上下文信息进行关联时，第二处理单元503可以根据该虚拟机标识，将虚拟机上下文信息与UE上下文信息进行关联。
上述装置还包括：
第二接收单元504，用于通过无线承载接收UE发送的报文。
第一确定单元505，用于根据该无线承载对应的UE上下文信息，以及该UE上下文信息和虚拟机上下文信息的关联关系，确定该UE对应的虚拟机以及该虚拟机的MAC地址。
封装单元506，用于使用该虚拟机的MAC地址对UE发送的报文进行封装。
第一发送单元507，用于通过本地虚拟交换机将封装后的报文发送至目标设备。
上述装置还包括：
第三接收单元508，用于通过本地虚拟交换机接收发往UE的报文。
第二确定单元509，用于根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和UE上下文信息的关联关系，确定该虚拟机的MAC地址对应的UE以及该UE上下文信息对应的无线承载。
解封装单元510，用于将接收的发往UE的报文解封装。
第二发送单元511，用于通过确定的该无线承载将解封装后的报文发送至确定的UE。
通过实施例一，通过在接入网设备上集成Hypervisor和虚拟交换机的功能，实现了扁平化的移动网络。网络中的UE之间、UE和外部数据网络之间，可以通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
实施例二
如图6所示，本发明实施例提供了一种移动网络扁平化的实现装置，该装置可部署在核心网设备上，包括：
指示单元601，用于指示接入网设备生成UE上下文信息。
发送单元602，用于发送一指令至云系统的控制器，该指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联。
其中，上述指令为应用程序编程接口(Application Programming Interface，API)指令，该API指令包括了接入网设备标识和虚拟机标识；接入网设备标识用于指定创建虚拟机的位置，虚拟机标识用于将虚拟机上下文信息和特定的UE上下文信息的关联。
通过实施例二，通过指示控制器远程调用接入网设备上的Hypervisor创建UE模拟的虚拟机，UE之间、UE与外部数据网络之间，通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
实施例三
如图7所示，本发明实施例提供了一种接入网设备，包括：
处理器701，用于与UE建立无线承载，生成UE上下文信息。
收发器702，用于接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令。
处理器701，还用于调用本地Hypervisor，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与UE上下文信息进行关联。
其中，上述虚拟机的上下文信息至少包括了虚拟机的MAC地址。
并且，虚拟机的上下文信息还可以包括虚拟机的最大带宽值，该最大宽带值用于约束虚拟机接收和发送报文时的最大带宽。
特别的，当UE并不是初次接入无线网络，而是在无线网络内从一个接入网设备切换到另一个接入网设备，那么目标接入网设备上的收发器702接收到的控制器发送的远端过程调用指令中会包含源接入网设备上的虚拟机上下文信息的镜像信息，该镜像信息一定包含了源接入网设备上的虚拟机的MAC地址。那么，在生成虚拟机的上下文信息时，处理器701可以根据源接入网设备上的虚拟机上下文信息的镜像信息，生成虚拟机上下文信息，并指定虚拟机的MAC地址为源接入设备上的虚拟机的MAC地址。由于目标接入网设备上的虚拟机保留了与源接入网设备上的虚拟机相同的MAC地址，所以可以自动接收和处理由源接入网设备转发到目标接入网设备的报文，从而保证了UE和外部数据网络以及其他UE之间通信的会话连续性。
为了保证能够将接入网设备上的虚拟机上下文信息与特定的UE上下文相关联，控制器发送的远端过程调用指令中包括了核心网设备分配的虚拟机标识。因此，在将虚拟机上下文信息与UE上下文信息进行关联时，处理器701可以根据该虚拟机标识，将虚拟机上下文信息与UE上下文信息进行关联。
收发器702还用于，通过无线承载接收UE发送的报文。
处理器701还用于，根据该无线承载对应的UE上下文信息，以及该UE上下文信息和虚拟机上下文信息的关联关系，确定该UE对应的虚拟机以及该虚拟机的MAC地址，以及使用该虚拟机的MAC地址对UE发送的报文进行封装。
收发器702还用于，通过本地虚拟交换机将封装后的报文发送至目标设备。
收发器702还用于，通过本地虚拟交换机接收发往UE的报文。
处理器701还用于，根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和UE上下文信息的关联关系，确定该虚拟机的MAC地址对应的UE以及该UE上下文信息对应的无线承载，以及将接收的发往UE的报文解封装。
收发器702还用于，通过确定的该无线承载将解封装后的报文发送至确定的UE。
通过实施例三，给出了一种集成了Hypervisor和虚拟交换机的功能的接入网设备，实现了扁平化的移动网络。网络中的UE之间、UE和外部数据网络之间，可以通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
实施例四
如图8所示，本发明实施例提供了一种核心网设备，包括：
处理器801，用于指示接入网设备生成UE上下文信息。
收发器802，用于发送一指令至云系统的控制器，该指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联。
其中，上述指令为应用程序编程接口API指令，该API指令包括了接入网设备标识和虚拟机标识；接入网设备标识用于指定创建虚拟机的位置，虚拟机标识用于将虚拟机上下文信息和特定的UE上下文信息的关联。
通过实施例四，核心网设备除了负责控制面的移动性管理等现有功能外，还用于指示控制器远程调用接入网设备上的Hypervisor创建UE模拟的虚拟机。UE之间、UE与外部数据网络之间，通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
实施例五
如图9所示，本发明实施例中，无线通信系统的接入网设备侧在本地创 建模拟UE的虚拟机，实现移动网络扁平化的流程如下：
S901、接入网设备与UE建立无线承载，生成UE上下文信息；
S902、接入网设备接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；
S903、接入网设备调用本地Hypervisor，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与UE上下文信息进行关联。
其中，S903中生成的虚拟机上下文信息至少包括了虚拟机的MAC地址，并且，虚拟机上下文信息还可以包括虚拟机的最大带宽值，该最大带宽值用于约束虚拟机接收和发送报文时的最大带宽。
具体的，运行在接入网设备上的Hypervisor收到控制器的远端过程调用指令后，并不会为创建的虚拟机分配计算和内存资源，而仅是建立本地虚拟机的虚拟网卡，并指定虚拟网卡的MAC地址，建立虚拟网卡和本地虚拟交换机的连接，从而将本地虚拟机与本地虚拟交换机相连，并通过配置虚拟交换机和物理交换机/路由器，建立该虚拟机到其他虚拟机/网络服务和外部数据网络的连接。其中，同一个接入网设备上的虚拟机之间的通信，通过该接入网设备的本地虚拟交换机即可实现；不同接入网设备上的虚拟机之间的通信，以及接入网设备上的虚拟机和物理服务器上的虚拟机之间的通信，通过接入网设备的虚拟交换机、物理交换机和物理服务器上的虚拟交换机实现；接入网设备上的虚拟机和外部数据网络之间的通信，通过接入网设备上的虚拟交换机、物理交换机和IP网关实现。
特别的，当UE并不是初次接入无线网络，而是在无线网络内从一个接入网设备切换到另一个接入网设备，那么目标接入网设备接收到的控制器发送的远端过程调用指令会包含源接入网设备上的虚拟机上下文信息的镜像信息，该镜像信息内一定包含了源接入网设备上的虚拟机的MAC地址。目标接入网设备上的Hypervisor根据该源接入网设备上的虚拟机上下文信息的镜像信息，生成本地虚拟机的上下文信息，并根据该镜像信息，确定源接入网设 备上的虚拟机的MAC地址，指定本地虚拟机的MAC地址为源接入设备上的虚拟机的MAC地址。由于目标接入网设备上的虚拟机保留了与源接入网设备上的虚拟机相同的MAC地址，所以可以自动接收和处理由源接入网设备转发到目标接入网设备的报文，从而保证了UE和外部数据网络以及其他UE之间通信的会话连续性。
为了保证接入网设备能够将本地的虚拟机上下文信息与特定的UE上下文相关联，控制器发送的远端过程调用指令中包括了核心网设备分配的虚拟机标识，根据该虚拟机标识，接入网设备便能将本地的虚拟机上下文信息与指定的UE上下文信息进行关联。每一个UE在接入网设备上都有一个与其唯一对应的虚拟机，每一个虚拟机都有一个唯一的虚拟机标识和MAC地址。
由于虚拟机上下文信息和UE上下文信息进行了关联，后续接入网设备可以通过无线承载接收UE发送的报文，然后根据该无线承载对应的UE上下文信息，以及该UE上下文信息和虚拟机上下文信息的关联关系，确定该UE对应的虚拟机以及该虚拟机的MAC地址，以及使用该虚拟机的MAC地址，对UE发送的报文进行封装，再通过本地虚拟交换机将封装后的报文发送至目标设备。对应的，接入网设备通过本地虚拟交换机接收发往UE的报文后，根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和用户设备上下文信息的关联关系，确定该虚拟机的MAC地址对应的用户设备以及该用户设备上下文信息对应的无线承载，然后将接收的发往UE的报文进行解封装，再通过确定的无线承载将解封装后的报文发送至确定的用户设备。
通过实施例五，给出了一种新的移动网络架构，该架构中将无线通信系统和云系统相结合，基站集成了Hypervisor和虚拟交换机的功能，物理交换机/路由器、IP网关等网络设备不需要现有移动网络的隧道封装和控制面板协议，利用通用化的网络设备便可实现扁平化的移动网络。网络中所有的网路连接管理由控制器统一管理，UE之间、UE与外部数据网络之间，通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
实施例六
如图10所示，本发明实施例中，无线通信系统的核心网设备通知云管理平台创建虚拟机，实现移动网络扁平化的流程如下：
S1001、核心网设备指示接入网设备生成UE上下文信息；
S1002、核心网设备发送一指令至云系统的控制器，该指令用于指示控制器远程调用接入网设备的Hypervisor，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与UE上下文信息进行关联。
其中，上述指令为API指令，该API指令包括了接入网设备标识和虚拟机标识，接入网设备标识用于指定创建虚拟机的位置，虚拟机标识用于将虚拟机上下文信息和特定的UE上下文信息的关联。
通过实施例六，给出了一种新的移动网络架构，该架构中将无线通信系统和云系统相结合，核心网设备除了负责控制面的移动性管理等现有功能外，还用于指示控制器远程调用接入网设备上的Hypervisor创建UE模拟的虚拟机。网络中所有的网路连接管理由控制器统一管理，UE之间、UE与外部数据网络之间，通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
实施例七
基于上述实施例五和实施例六，本发明实施例针对UE接入无线网络，并和外部数据网络建立连接的过程进行介绍，参阅图11所示，具体流程如下：
S1101、UE发起网络附着流程；
S1102、eNB收到该消息后，选择MME并转发该消息给MME，其中，eNB转发给MME的消息中包含了eNB为该UE分配的标识eNB UE ID；
S1103、MME对该UE进行认证后，向HSS请求签约信息；
其中，MME对UE进行认证的步骤可参考现有技术，此处不再赘述。
S1104、HSS返回签约信息给MME；
S1105、MME向eNB发起初始上下文建立请求消息，该消息除了包含发送给UE的附着接受消息外，还包含其他信息，如UE的安全上下文信息，UE 的漫游限制列表，MME为该UE分配的标识：MME UE ID，以及S702中eNB发送给MME的eNB UE ID；
后续eNB和MME发送消息时，通过MME UE ID和eNB UE ID对来唯一确定该消息针对哪个UE。需要注意的是，在新的移动网络架构下，这条消息不需要包含承载上下文信息，即网关分配的隧道ID等信息。
S1106、eNB和UE之间建立无线承载；
S1107、MME向控制器发送创建虚拟机的API指令，该API指令中包含了基站标识和虚拟机标识；
其中，基站标识用于指定创建虚拟机的位置，虚拟机标识用于后续基站将该虚拟机上下文信息和特定的UE上下文信息的关联，虚拟机标识可以包含S705中MME为该UE分配的MME UE ID。
S1108、控制器发送远端过程调用指令给eNB，指示eNB调用运行在本地的Hypervisor创建虚拟机；
运行在eNB上的Hypervisor收到该远端过程调用指令后，在本地创建虚拟机，但并不会为该虚拟机分配计算和内存资源，而仅是建立虚拟机的虚拟网卡，指定虚拟网卡的MAC地址，建立虚拟网卡和虚拟交换机之间的连接；其中，虚拟网卡的MAC地址可以由Hypervisor分配，也可以由控制器指定。同时，Hypervisor生成虚拟机上下文信息，并将该虚拟机上下文信息和S1105中生成的UE上下文信息进行关联，具体可以通过上述的虚拟机标识进行关联。其中，Hypervisor生成的虚拟机上下文信息至少包括了虚拟机的MAC地址，并且，虚拟机上下文信息还可以包括虚拟机的最大带宽值，该最大带宽值用于约束虚拟机接收和发送报文时的最大带宽。
至此，UE已经和外部数据网络建立了连接。
S1109、虚拟机发起IP地址分配过程。
在分配IP地址后，UE可以进一步和网内的其他UE、网络服务(物理服务器上的虚拟机)以及外部数据网络使用分配的IP地址进行通信。
其中，报文处理过程如下：eNB通过无线承载接收UE发送的报文后， 可以封装成该UE模拟的虚拟机发送的报文，通过虚拟交换机发送到网络，具体的封装就是通过无线承载接收到UE发送的报文后，根据该无线承载对应的UE上下文信息，以及该UE上下文信息和虚拟机上下文信息的关联关系，确定该UE对应的虚拟机以及该虚拟机的MAC地址，然后使用该MAC地址，对报文进行封装，再发送到网络中去。eNB接收到网络发送给UE的报文后，需要先解封装，再通过无线承载发送给UE，具体的解封装就是接收到网络发送的报文后，根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和UE上下文信息的关联关系，确定该虚拟机的MAC地址对应的UE以及该UE上下文信息对应的无线承载，然后对该报文的MAC地址进行解封装，再发送给UE。
通过实施例七，对MME和eNB进行了改动，并将无线通信系统和云系统相结合，实现了一种新的移动网络，解决现有的移动网络中，UE和其他UE或者外部数据网络交互时均需要集中的锚点带来的路径传输不够优化、传输时间长的问题。
实施例八
基于上述实施例五和实施例六，本发明实施例针对UE由于移动性从一个基站切换到另一个基站的过程进行介绍，参阅图12所示，具体流程如下：
在切换前，UE和外部数据网络建立了连接，建立过程参考实施例三。后续通过切换准备和切换执行过程，UE与目标eNB建立了无线连接。
需要注意的是，本发明实施例在切换准备过程中，源eNB和目标eNB会交换UE上下文信息，在新的移动网络架构下，此UE上下文信息不包含承载上下文信息，即网关分配的隧道ID等信息。
S1201、目标eNB与UE建立无线连接后，指示MME进行路径切换；
其中，在切换准备过程中，源eNB传递给目标eNB的UE上下文信息中包含了MME分配的MME UE ID，可以用于让MME识别哪个UE发起了切换流程。
S1202、MME返回路径切换请求确认消息给目标eNB；
S1203、MME向控制器发送迁移虚拟机的API指令，该API指令中包含了目标基站标识和虚拟机标识；
其中，目标基站标识用于指定迁移以后虚拟机的创建位置，虚拟机标识用于后续目标基站将该虚拟机上下文信息和特定的UE上下文信息的关联，虚拟机标识可以包含切换准备过程中源eNB传递给目标eNB的MME UE ID。
S1204、控制器发送远端过程调用指令给目标eNB，指示目标eNB调用运行在本地的Hypervisor创建虚拟机；
其中，上述远端过程调用指令中还包含了UE在源eNB上模拟的虚拟机上下文信息的镜像信息，该虚拟机上下文信息的镜像信息至少包含了UE在源eNB上模拟的虚拟机的MAC地址。
运行在eNB上的Hypervisor收到该远端过程调用指令后，在本地创建虚拟机，根据源eNB的虚拟机上下文信息的镜像信息，生成本地的虚拟机上下文信息，其中，该虚拟机上下文信息至少包括了虚拟机的MAC地址，并且，虚拟机上下文信息还可以包括虚拟机的最大带宽值，该最大带宽值用于约束虚拟机接收和发送报文时的最大带宽。Hypervisor指定本地虚拟机的MAC地址为源eNB上的虚拟机的MAC地址，建立虚拟机的虚拟网卡和虚拟交换机之间的连接。同时，Hypervisor将生成的虚拟机上下文信息和切换准备过程中源eNB传递给目标eNB的UE上下文信息进行关联，具体可以通过上述的虚拟机标识进行关联。
S1205、控制器指示物理交换机/路由器修改转发表项；
具体的，控制器可以通过和物理交换机/路由器之间的可编程接口，或者分布式的路由协议来实现物理交换机/路由器的转发表项的更新，从而将发往源eNB上的虚拟机的报文转发到目标eNB上的虚拟机。由于目标eNB上的虚拟机保留了和源eNB上的虚拟机相同的MAC地址，所以可以自动接收和处理报文，保证了UE和外部数据网络以及其他UE之间通信的会话连续性。
目标eNB后续接收和发送针对该UE的报文处理过程如下：目标eNB通过无线承载接收UE发送的报文后，可以封装成该UE模拟的虚拟机发送的报 文，通过虚拟交换机发送到网络，具体的封装就是通过无线承载接收到UE发送的报文后，根据该无线承载对应的UE上下文信息，以及该UE上下文信息和虚拟机上下文信息的关联关系，确定该UE对应的虚拟机以及该虚拟机的MAC地址，然后使用该MAC地址，对报文外层进行封装，再发送到网络中去。目标eNB接收到网络发送给UE的报文后，需要解封装后，再通过无线承载发送给UE，具体的解封装就是接收到网络发送的报文后，根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和UE上下文信息的关联关系，确定该虚拟机的MAC地址对应的UE以及该UE上下文信息对应的无线承载，然后对该报文的MAC地址进行解封装，再发送给UE。
S1206、目标eNB通知源eNB释放无线资源；
源eNB接收到通知后，释放本地的UE上下文信息。
S1207、控制器发送远端过程调用指令给源eNB，指示源eNB调用本地的Hypervisor删除虚拟机。
运行在源eNB上的Hypervisor收到该远端过程调用指令后，根据该指令中包含的待删除虚拟机的虚拟机标识，删除相应的本地虚拟机，以及释放相应的本地虚拟机上下文信息。
通过实施例八，当UE移动后，无线通信系统的MME通知云系统的控制器发生虚拟机迁移事件，云计算控制系统通过在新的基站上创建虚拟机并重新调整网络连接，保证了UE和外部数据网络以及其他UE之间通信的会话连续性，整个切换过程中，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
实施例九
本发明实施例提供了一种移动网络扁平化的实现系统，该系统包括：
核心网设备，用于指示接入网设备生成UE上下文信息；发送一指令至云系统的控制器，所述指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联。
接入网设备，用于与UE建立无线承载，生成UE上下文信息；接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与UE上下文信息进行关联。
其中，上述核心网设备发送给控制器的指令为API指令，该API指令包括了接入网设备标识和虚拟机标识。接入网设备标识用于指定创建虚拟机的位置，虚拟机标识用于将虚拟机上下文信息和特定的UE上下文信息的关联。
上述接入网设备生成的虚拟机的上下文信息至少包括了虚拟机的MAC地址。并且，虚拟机的上下文信息还可以包括虚拟机的最大带宽值，该最大宽带值用于约束虚拟机接收和发送报文时的最大带宽。
特别的，当UE并不是初次接入无线网络，而是在无线网络内从一个接入网设备切换到另一个接入网设备，那么目标接入网设备接收到的控制器发送的远端过程调用指令中会包含源接入网设备上的虚拟机上下文信息的镜像信息，该镜像信息一定包含了源接入网设备上的虚拟机的MAC地址。那么，在生成虚拟机的上下文信息时，目标接入网设备可以根据源接入网设备上的虚拟机上下文信息的镜像信息，生成虚拟机上下文信息，并指定虚拟机的MAC地址为源接入设备上的虚拟机的MAC地址。由于目标接入网设备上的虚拟机保留了与源接入网设备上的虚拟机相同的MAC地址，所以可以自动接收和处理由源接入网设备转发到目标接入网设备的报文，从而保证了UE和外部数据网络以及其他UE之间通信的会话连续性。
为了保证能够将接入网设备上的虚拟机上下文信息与特定的UE上下文相关联，控制器发送的远端过程调用指令中包括了核心网设备分配的虚拟机标识。因此，在将虚拟机上下文信息与UE上下文信息进行关联时，接入网设备可以根据该虚拟机标识，将虚拟机上下文信息与UE上下文信息进行关联。
接入网设备还可以用于，通过无线承载接收UE发送的报文，并根据该无线承载对应的UE上下文信息，以及该UE上下文信息和虚拟机上下文信息的关联关系，确定该UE对应的虚拟机以及该虚拟机的MAC地址，以及使用该 虚拟机的MAC地址对UE发送的报文进行封装，最后，通过本地虚拟交换机将封装后的报文发送至目标设备。
接入网设备还可以用于，通过本地虚拟交换机接收发往UE的报文，并根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和UE上下文信息的关联关系，确定该虚拟机的MAC地址对应的UE以及该UE上下文信息对应的无线承载，以及将接收的发往UE的报文解封装，最后通过确定的该无线承载将解封装后的报文发送至确定的UE。
通过实施例九，给出了一种新的移动网络架构，该架构中将无线通信系统和云系统相结合，接入网设备集成了Hypervisor和虚拟交换机的功能，核心网设备除了负责控制面的移动性管理等现有功能外，还用于指示控制器远程调用接入网设备上的Hypervisor创建UE模拟的虚拟机，网络中所有的网路连接管理由控制器统一管理。UE之间、UE与外部数据网络之间，通过封装UE模拟的虚拟机的MAC地址的报文进行通信，不需要进行集中的锚点，从而优化了传输路径，提高了传输效率。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (19)

  1. 一种移动网络扁平化的实现装置，其特征在于，包括：
    第一处理单元，用于与用户设备建立无线承载，生成用户设备上下文信息；
    第一接收单元，用于接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；
    第二处理单元，用于调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与用户设备上下文信息进行关联。
  2. 如权利要求1所述的装置，其特征在于，所述虚拟机的上下文信息包括虚拟机的介质访问控制层MAC地址。
  3. 如权利要求2所述的装置，其特征在于，所述虚拟机的上下文信息还包括虚拟机的最大带宽值；所述最大宽带值用于约束虚拟机接收和发送报文时的最大带宽。
  4. 如权利要求1所述的装置，其特征在于，所述远端过程调用指令包括源接入网设备上的虚拟机上下文信息的镜像信息；所述镜像信息包括源接入网设备上的虚拟机的MAC地址；
    在生成虚拟机的上下文信息时，所述第二处理单元具体用于：
    根据所述源接入网设备上的虚拟机上下文信息的镜像信息，生成虚拟机上下文信息，并指定虚拟机的MAC地址为所述源接入设备上的虚拟机的MAC地址。
  5. 如权利要求1所述的装置，其特征在于，所述远端过程调用指令包括核心网设备分配的虚拟机标识；
    在将虚拟机上下文信息与用户设备上下文信息进行关联时，所述第二处理单元具体用于：
    根据所述虚拟机标识，将虚拟机上下文信息与用户设备上下文信息进行 关联。
  6. 如权利要求1或4所述的装置，其特征在于，还包括：
    第二接收单元，用于通过无线承载接收用户设备发送的报文；
    第一确定单元，用于根据该无线承载对应的用户设备上下文信息，以及该用户设备上下文信息和虚拟机上下文信息的关联关系，确定该用户设备对应的虚拟机以及该虚拟机的MAC地址；
    封装单元，用于使用该虚拟机的MAC地址对用户设备发送的报文进行封装；
    第一发送单元，用于通过本地虚拟交换机将封装后的报文发送至目标设备。
  7. 如权利要求1或4所述的装置，其特征在于，还包括：
    第三接收单元，用于通过本地虚拟交换机接收发往用户设备的报文；
    第二确定单元，用于根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和用户设备上下文信息的关联关系，确定该虚拟机的MAC地址对应的用户设备以及该用户设备上下文信息对应的无线承载；
    解封装单元，用于将接收的发往用户设备的报文解封装；
    第二发送单元，用于通过确定的该无线承载将解封装后的报文发送至确定的用户设备。
  8. 一种移动网络扁平化的实现装置，其特征在于，包括：
    指示单元，用于指示接入网设备生成用户设备上下文信息；
    发送单元，用于发送一指令至云系统的控制器，所述指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联。
  9. 如权利要求8所述的装置，其特征在于，所述指令为应用程序编程接口API指令，所述API指令包括接入网设备标识和虚拟机标识。
  10. 一种移动网络扁平化的实现方法，其特征在于，包括：
    接入网设备与用户设备建立无线承载，生成用户设备上下文信息；
    接入网设备接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；
    接入网设备调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与用户设备上下文信息进行关联。
  11. 如权利要求10所述的方法，其特征在于，所述虚拟机的上下文信息包括虚拟机的介质访问控制层MAC地址。
  12. 如权利要求11所述的方法，其特征在于，所述虚拟机的上下文信息还包括虚拟机的最大带宽值；所述最大宽带值用于约束虚拟机接收和发送报文时的最大带宽。
  13. 如权利要求10所述的方法，其特征在于，所述远端过程调用指令包括源接入网设备上的虚拟机上下文信息的镜像信息；所述镜像信息包括源接入网设备上的虚拟机的MAC地址；
    生成虚拟机的上下文信息，包括：
    根据所述源接入网设备上的虚拟机上下文信息的镜像信息，生成虚拟机上下文信息，并指定虚拟机的MAC地址为所述源接入设备上的虚拟机的MAC地址。
  14. 如权利要求10所述的方法，其特征在于，所述远端过程调用指令包括核心网设备分配的虚拟机标识；
    将虚拟机上下文信息与用户设备上下文信息进行关联，包括：
    根据所述虚拟机标识，将虚拟机上下文信息与用户设备上下文信息进行关联。
  15. 如权利要求10或13所述的方法，其特征在于，还包括：
    接入网设备通过无线承载接收用户设备发送的报文；
    接入网设备根据该无线承载对应的用户设备上下文信息，以及该用户设备上下文信息和虚拟机上下文信息的关联关系，确定该用户设备对应的虚拟机以及该虚拟机的MAC地址；
    接入网设备使用该虚拟机的MAC地址对用户设备发送的报文进行封装；
    接入网设备通过本地虚拟交换机将封装后的报文发送至目标设备。
  16. 如权利要求10或13所述的方法，其特征在于，还包括：
    接入网设备通过本地虚拟交换机接收发往用户设备的报文；
    接入网设备根据该报文的MAC地址对应的虚拟机上下文信息，以及该虚拟机上下文信息和用户设备上下文信息的关联关系，确定该虚拟机的MAC地址对应的用户设备以及该用户设备上下文信息对应的无线承载；
    接入网设备将接收的发往用户设备的报文解封装；
    接入网设备通过确定的该无线承载将解封装后的报文发送至确定的用户设备。
  17. 一种移动网络扁平化的实现方法，其特征在于，包括：
    核心网设备指示接入网设备生成用户设备上下文信息；
    核心网设备发送一指令至云系统的控制器，所述指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联。
  18. 如权利要求17所述的方法，其特征在于，所述指令为应用程序编程接口API指令，所述API指令包括接入网设备标识和虚拟机标识。
  19. 一种移动网络扁平化的实现系统，其特征在于，包括：
    核心网设备，用于指示接入网设备生成用户设备上下文信息；发送一指令至云系统的控制器，所述指令用于指示控制器远程调用接入网设备的管理程序，在接入网设备本地创建虚拟机，生成虚拟机上下文信息，并将虚拟机上下文信息与用户设备上下文信息进行关联；
    接入网设备，用于与用户设备建立无线承载，生成用户设备上下文信息；接收云系统的控制器发送的用于指示创建虚拟机的远端过程调用指令；调用本地管理程序，创建虚拟机，并建立虚拟机与本地虚拟交换机的连接，以及生成虚拟机上下文信息，将虚拟机上下文信息与用户设备上下文信息进行关联。
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