WO2017049458A1 - 一种控制方法及本地控制面设备 - Google Patents

一种控制方法及本地控制面设备 Download PDF

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Publication number
WO2017049458A1
WO2017049458A1 PCT/CN2015/090270 CN2015090270W WO2017049458A1 WO 2017049458 A1 WO2017049458 A1 WO 2017049458A1 CN 2015090270 W CN2015090270 W CN 2015090270W WO 2017049458 A1 WO2017049458 A1 WO 2017049458A1
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WIPO (PCT)
Prior art keywords
control plane
user equipment
plane device
remote control
local control
Prior art date
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PCT/CN2015/090270
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English (en)
French (fr)
Inventor
李岩
朱方园
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to MYPI2018700807A priority Critical patent/MY189130A/en
Priority to CN201580082315.8A priority patent/CN107926064B/zh
Priority to EP15904346.2A priority patent/EP3334236B1/en
Priority to EP19189923.6A priority patent/EP3629669B1/en
Priority to PCT/CN2015/090270 priority patent/WO2017049458A1/zh
Priority to CN202010392419.1A priority patent/CN111726888A/zh
Priority to BR112018004604-3A priority patent/BR112018004604B1/pt
Publication of WO2017049458A1 publication Critical patent/WO2017049458A1/zh
Priority to US15/908,225 priority patent/US10506648B2/en
Priority to US16/663,044 priority patent/US11096227B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/082—Load balancing or load distribution among bearers or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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 wireless communication technologies, and in particular, to a control method and a local control plane device.
  • 3GPP 3rd Generation Partnership Project proposes a new EPS (Evolved Packet System) network, including UE (User Equipment) and eNB (Evolutional Node B, Base station), SGW (Serving Gateway), PGW (Packet Data Network Gateway), and MME (Mobility Management Entity).
  • the SGW is used as a forwarding plane anchor between access networks
  • the PGW is used as a forwarding plane anchor between the access network and the non-access network.
  • the PGW deployment location is high, so that the UE remains connected to the PGW even when the UE moves, thereby ensuring the IP unchanged.
  • the routing problem may occur. That is, the data of the UE will go to the PGW with a higher position and then return to the local server, resulting in a longer packet transmission delay.
  • the 3GPP defines the SIPTO (Selected IP Traffic Offload) function.
  • the core idea is to deploy the SGW and the PGW in a low-level manner. When the UE accesses the local server, the local PGW allocates an IP address, and the data only passes through the local.
  • the SGW and the PGW which avoids the route bypass, solves the problem that the packet transmission delay is too long.
  • the disadvantage of deploying the SGW and the PGW in the low position is that the distance from the centrally deployed MME is far, and the UE changes from the idle state. The signaling transmission delay becomes longer in the active state. Therefore, another way to reduce the signaling transmission delay is to move the MME down to the low level and deploy it with the local gateway. However, this also greatly reduces the number of UEs under the jurisdiction of each MME, and it is easy to switch between different MMEs when the UE moves, resulting in an increase in signaling interaction and an increase in system load.
  • the embodiment of the invention provides a control method and a local control plane device, which can reduce the signaling transmission delay when the user equipment changes from the idle state to the active state, and can avoid the user equipment moving guide.
  • a first aspect of the embodiments of the present invention provides a control method, where the method is applied to a wireless communication system, where the wireless communication system includes a user equipment, a base station, a gateway device, a local control plane device, and a remote control plane device, where Methods include:
  • the local control plane device acquires context information of the user equipment from the remote control plane device according to an interaction process between the user equipment and the remote control plane device;
  • the local control plane device establishes a radio bearer between the base station where the current camping cell of the user equipment is located and the user equipment according to the context information of the user equipment.
  • the interaction process between the user equipment and the remote control plane device includes:
  • the user equipment initiates an attach request process and a packet data network connection establishment process.
  • the local control plane device acquires context information of the user equipment from the remote control plane device according to an interaction process between the user equipment and a remote control plane device.
  • the local control plane device forwards the forwarding plane modification information sent by the remote control plane device to the gateway device, and the forwarding plane is modified.
  • the information carries context information of the user equipment;
  • the local control plane device obtains context information of the user equipment by parsing the forwarding plane modification information.
  • the local control plane device acquires context information of the user equipment from the remote control plane device according to an interaction process between the user equipment and a remote control plane device.
  • the local control plane device forwards the forwarding plane modification information sent by the remote control plane device to the gateway device;
  • the local control plane device receives context information of the user equipment sent by the remote control plane device.
  • the local control plane device establishes, according to the context information of the user equipment, a radio bearer between the user equipment and a base station where the user equipment currently camps on the cell include:
  • the system After the service request sent by the base station where the cell is located, the system sends a context establishment request to the base station where the user equipment is currently camped according to the context information of the user equipment, so that the base station where the user equipment is currently camped is established.
  • a radio bearer with the user equipment is established.
  • the local control plane device receives the service that is sent by the user equipment by using a base station where the user equipment currently camps on the cell Before the request, it also includes:
  • the local control plane device receives a downlink data arrival notification message, the local control plane device initiates paging to the user equipment according to the context information of the user equipment, so that the user equipment is converted from an idle state to an activated state, and passes the current station.
  • the base station where the staying cell is located sends a service request.
  • the local control plane device acquires the user equipment from the remote control plane device according to an interaction process between the user equipment and the remote control plane device.
  • the context information it also includes:
  • the local control plane After receiving the deletion context request sent by the remote control plane device, the local control plane deletes the saved context information of the user equipment;
  • the local control plane device sends a delete context request to the gateway device, so that the gateway device deletes the saved context information of the user equipment.
  • the local control plane device establishes, according to the context information of the user equipment, a radio bearer between the base station where the current camping cell of the user equipment is located and the user equipment After that, it also includes:
  • the local control plane device sends a modify user status notification to the remote control plane device, so that the remote control plane device modifies state information of the user equipment.
  • the remote control plane device includes:
  • the context information of the user equipment includes:
  • the security context of the user equipment and the bearer context of the user equipment includes a user plane address of the forwarding plane gateway, a tunnel identifier, a tracking area list, a global unique temporary identifier, and a control plane identifier assigned by the remote control plane.
  • a second aspect of the embodiments of the present invention provides a local control plane device, where the local control plane device is applied to a wireless communication system, where the wireless communication system further includes a user equipment, a base station, a gateway device, and a remote control plane device.
  • the local control plane devices include:
  • An information acquiring module configured to acquire context information of the user equipment from the remote control plane device according to an interaction process between the user equipment and the remote control plane device;
  • a bearer establishing module configured to establish, by the local control plane device, a radio bearer between the base station where the current camping cell of the user equipment is located and the user equipment according to the context information of the user equipment.
  • the interaction process between the user equipment and the remote control plane device includes:
  • the user equipment initiates an attach request process and a packet data network connection establishment process.
  • the information acquiring module includes:
  • the information forwarding unit is configured to forward the forwarding surface modification information sent by the remote control plane device to the gateway device during the interaction between the user equipment and the remote control plane device, where the forwarding plane is modified.
  • the information carries context information of the user equipment;
  • the information obtaining unit is configured to obtain context information of the user equipment by parsing the forwarding plane modification information.
  • the information acquiring module includes:
  • the information forwarding unit is configured to forward the forwarding surface modification information sent by the remote control plane device to the gateway device during the interaction between the user equipment and the remote control plane device;
  • an information acquiring unit configured to receive context information of the user equipment sent by the remote control plane device.
  • the bearer establishing module is specifically configured to: after receiving the service request sent by the user equipment by using the base station where the user equipment is currently camped, The context information of the user equipment is sent to the base station where the user equipment is currently camped to send a context establishment request, so that the base station where the user equipment currently camps on the cell establishes a radio bearer with the user equipment.
  • the local control plane device includes:
  • a paging initiation module configured to receive a downlink data arrival notification message according to the user equipment
  • the context information initiates paging to the user equipment to cause the user equipment to transition from an idle state to an active state, and send a service request through a base station where the currently camped cell is located.
  • the local control plane device further includes:
  • An information deletion module configured to delete the saved context information of the user equipment after receiving the delete context request sent by the remote control plane device;
  • the local control plane device sends a delete context request to the gateway device, so that the gateway device deletes the saved context information of the user equipment.
  • the local control plane device further includes:
  • the notification sending module is configured to send a modified user status notification to the remote control plane device, so that the remote control plane device modifies the status information of the user equipment.
  • the remote control plane device includes:
  • the context information of the user equipment includes:
  • the security context of the user equipment and the bearer context of the user equipment includes a user plane address of the forwarding plane gateway, a tunnel identifier, a tracking area list, a global unique temporary identifier, and a control plane identifier assigned by the remote control plane.
  • the local control plane device obtains the context information of the user equipment from the remote control plane device according to the interaction process between the user equipment and the remote control plane device, and further, according to the context information of the user equipment, Establishing a radio bearer between the base station and the user equipment where the user equipment is currently camped on, and reducing signaling signaling delay when the user equipment changes from the idle state to the active state, and avoiding frequent switching of the control plane caused by the user equipment moving The problem caused by excessive signaling interaction.
  • FIG. 1 is a schematic flow chart of a control method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a control method according to a first embodiment of the present invention
  • FIG. 3 is a schematic flow chart of another control method according to the first embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a control method according to a second embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of another control method according to a second embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a local control plane device according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an information acquiring module according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of another information acquiring module according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another local control plane device according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a wireless communication system according to a first embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a wireless communication system according to a second embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • Universal Mobile Telecommunication System Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the user equipment (User Equipment, referred to as “UE”) provided by the embodiment of the present invention includes a terminal. (Terminal), mobile station (Mobile Station, "MS”) or mobile terminal (Mobile Terminal), etc., the user equipment may be through a radio access network (Radio Access Network, referred to as "RAN") and one or more The core network communicates, for example, the user equipment may be a mobile phone (or “cellular” phone) or a computer with a mobile terminal, etc., for example, the user device may also be portable, pocket-sized, handheld, built-in or on-board. Mobile devices that exchange voice and/or data with a wireless access network.
  • the base station provided by the embodiment of the present invention may be an evolved base station (Evolutional Node B, referred to as "eNB”) in LTE.
  • eNB evolved base station
  • FIG. 1 is a schematic flowchart of a control method according to an embodiment of the present invention.
  • the method is applied to a wireless communication system, where the wireless communication system includes a user equipment, a base station, a gateway device, a local control plane device, and a remote control plane device, such as
  • the flow of the control method in this embodiment shown in the figure may include:
  • the local control plane device acquires context information of the user equipment from the remote control plane device according to the interaction process between the user equipment and the remote control plane device.
  • the context information of the user equipment includes at least a security context, a bearer context (including the user plane address of the SGW and the user plane TEID-U), a TAI (Tracking Area Identity) list, and a globally unique Temporary Identity (GUTI).
  • the unique temporary identifier includes the control plane TEID-C assigned by the MME, and the TEID-C assigned by the SGW.
  • the TEID (Tunnel Endpoint ID) is a tunnel endpoint identifier.
  • the interaction process between the user equipment and the remote control plane device includes an attach request process initiated by the user equipment and a packet data network (PDN) connection establishment process.
  • PDN packet data network
  • the manner in which the local control plane device obtains the context information of the user equipment from the remote control plane device according to the interaction process between the user equipment and the remote control plane device includes the following two types:
  • Manner 1 During the interaction between the user equipment and the remote control plane device, the local control plane device forwards the forwarding surface modification information sent by the remote control plane device to the gateway device, and the forwarding surface modification information carries the context information of the user equipment. Then, the local control plane device can obtain the context information of the user equipment by parsing the forwarding surface modification information.
  • the forwarding plane modification information herein may be a modified bearer request in the application scenario described in FIG. 2 below, that is, when the local control plane device forwards the modified bearer request sent by the remote control plane device to the gateway device. And parsing the context information of the user equipment carried therein.
  • the modification information may also be a modified downlink data forwarding rule message in the application scenario described in FIG. 4, that is, the local control plane device parses the modified downlink data forwarding rule sent by the remote control plane device to the gateway device. Context information of the user equipment carried.
  • the local control plane device forwards the forwarding plane modification information sent by the remote control plane device to the gateway device, and receives the user equipment directly sent by the remote control plane device. Contextual information.
  • the local control plane device establishes, according to the context information of the user equipment, a radio bearer between the base station where the current camping cell of the user equipment is located and the user equipment.
  • the local control plane device After receiving the service request sent by the user equipment by the base station where the current camping cell is located, the local control plane device sends a context establishment request to the base station according to the context information of the user equipment, so that the base station establishes the user equipment with the user equipment. Wireless bearer between.
  • the user equipment sending a service request through the base station where the current camping cell is located may be triggered by the downlink data arrival notification.
  • the local control plane device when the user equipment is in an idle state, after receiving the downlink data arrival notification message, the local control plane device initiates paging to the user equipment according to the context information of the user equipment, so that the user equipment changes from the idle state to the active state. Status, and send a service request through the base station where the currently camped cell is located.
  • the source local control plane device and the source gateway device are changed.
  • the process of deleting the context information of the saved user device is performed.
  • the source local control plane after receiving the delete context request sent by the remote control plane device, deletes the saved context information of the user equipment, and sends a delete context request to the source gateway device to delete the source gateway device. Context information for the user device.
  • the source gateway here includes the source SGW and does not include the source PGW.
  • the local control plane device processes the paging and service request process of the user equipment, and after the user equipment transitions from the idle state to the activated state, the local control plane The device sends a modify user status notification to the remote control plane device, so that the remote control plane device modifies the status information of the user equipment.
  • the embodiment of the present invention introduces a local control plane device in an existing wireless network system, and has the following functions: a signaling agent between a base station and a remote control plane device, and a remote control plane device and Signaling agent between local gateway devices.
  • the local control plane device can save the user's bearer context, security context, and user TAI list, and is responsible for the user's paging and service request flow. Other processes are still processed by the remote control plane device in the existing wireless network system.
  • the embodiment of the invention distributes part of the functions of the remote control plane device in the existing wireless network system, so that the paging and service request functions can be processed locally, thereby saving the time required for signaling transmission.
  • the low latency application provides a shorter transition time from idle to active, reducing the first packet transmission delay.
  • FIG. 2 is a schematic flowchart of a control method according to a first embodiment of the present invention. The method is applied to a wireless communication system, where the wireless communication system includes a user equipment, a base station, a gateway device, a local control plane device, and a remote control plane. device.
  • the wireless communication system includes a user equipment, a base station, a gateway device, a local control plane device, and a remote control plane. device.
  • the architecture is based on a centralized deployment scenario of a SIP (Selected IP Traffic Offload) gateway of a macro network.
  • the function entity local control plane (Local Control, LC), the local control plane device integrates the functions of SGW and PGW offload offloading, and is close to the access network.
  • the S1 interface is the interface between the remote control plane and the base station
  • the S11 interface is the interface between the remote control plane and the SGW
  • the local control plane is the signaling proxy between the two interfaces, facing the base station and the SGW.
  • the MME, the remote control plane acts as a base station and SGW.
  • the gateway device includes an SGW/PGW
  • the remote control plane device includes an MME of a traditional network architecture.
  • the flow of the control method in this embodiment shown in FIG. 2 may include:
  • the user equipment sends an attach request to the base station.
  • the UE sends an attach request to the eNB to initiate a network attach procedure, where the attach request carries an IMSI (International Mobile Subscriber Identification Number), a core network capability, a PDN type, and a selected PLMN of the UE. (Public Land Mobile Network, public land mobile network).
  • IMSI International Mobile Subscriber Identification Number
  • PDN type Public Land Mobile Network
  • PLMN Public Land Mobile Network
  • the base station sends an attach request to the local control plane device.
  • the eNB sends the initial UE message of the S1AP to the local control plane device, where the initial UE message of the S1AP carries an attach request.
  • the local control plane device sends an attach request to the remote control plane device.
  • the local control plane device sends an attach request message to the MME.
  • the local control plane device authenticates the user equipment and establishes a security process.
  • the MME authenticates the UE and performs a NAS (Network Attached Storage) security establishment process, after which all NAS messages are performed by the NAS security function indicated by the MME. protection.
  • NAS Network Attached Storage
  • the remote control plane device sends a create session request to the local control plane device.
  • the MME sends a create session request to the local control plane device, where the create session request includes an EPS bearer identifier, an APN (Access Point Name) of the UE, an MME TEID of the control plane, and a default EPS bearer QoS (Quality). Information such as service, quality of service, and PDN type.
  • the local control plane device sends a create session request to the gateway device.
  • the local control plane forwards the create session request to the SGW/PGW.
  • the gateway device sends a create session response to the local control plane device.
  • the SGW/PGW returns a create session response, where the create session response includes information such as a PDN type, a user plane SGW address and a TEID, a control plane SGW TEID, an EPS bearer identifier, an EPS bearer QoS, a PGW address, and a TEID.
  • the create session response includes information such as a PDN type, a user plane SGW address and a TEID, a control plane SGW TEID, an EPS bearer identifier, an EPS bearer QoS, a PGW address, and a TEID.
  • the local control plane device sends a create session response to the remote control plane device.
  • the local control plane device forwards the create session response to the MME.
  • the remote control plane device sends an initial context setup request to the base station by using the local control plane device.
  • the MME sends an initial context setup request of the S1AP to the eNB, where the initial context setup request of the S1AP carries an attach accept message.
  • the S1AP message includes a security context of the UE, an EPS bearer QoS, an EPS bearer identifier, a user plane SGW address, and a TEID.
  • the attach accept message includes information such as GUTI, PDN type, PDN address, APN, and TAI list.
  • the base station performs a radio resource control connection configuration with the user equipment.
  • an RRC (Radio Resource Control) connection configuration process is completed between the eNB and the UE.
  • the base station sends an initial context setup response to the remote control plane device by using the local control plane device.
  • the eNB returns an initial context setup response message, where the initial context setup response message includes an address and TEID of the eNB transmitting the downlink data on the S1-U interface, and the UE is attached. Into the message.
  • the remote control plane device sends a modify bearer request to the local control plane device.
  • the MME sends a modify bearer request to the local control plane device, where the modify bearer request includes an EPS bearer identifier, an address of the eNB, and a TEID.
  • the local control plane device acquires context information of the user equipment.
  • the manner in which the local control plane device acquires the context information of the UE from the MME includes the following two types:
  • the modified bearer request sent by the MME carries the context information of the UE, and the local control plane device can obtain the context information of the UE by parsing and modifying the bearer request.
  • Manner 2 The local control plane device receives the context information of the UE directly sent by the MME.
  • the context information of the UE includes a security context, a bearer context (including the user plane address of the SGW and the user plane TEID-U), a TAI list, a GUTI, a control plane TEID-C allocated by the MME, and a TEID-C allocated by the SGW.
  • the local control plane device saves this information.
  • the local control plane device sends a modify bearer request to the gateway device.
  • the local control plane device forwards the modify bearer request to the SGW/PGW.
  • the gateway device sends a modify bearer response to the local control plane device.
  • the SGW/PGW returns a modified bearer response, where the modified bearer response carries an EPS bearer identifier.
  • the local control plane device sends a modify bearer response to the remote control plane device.
  • the local control plane notifies the MME of the modify bearer response message.
  • the local control plane device After receiving the downlink data arrival notification message, the local control plane device initiates paging to the user equipment.
  • the local control plane device determines the saved context information according to the TEID-C allocated by the MME, acquires the TAI list, and initiates the locating to all the eNBs in the TAI list where the UE is located.
  • the message is sent and carries the S-TMSI (partial information of the GUTI), and the eNB initiates paging to the UE.
  • the user equipment sends a service request to the local control plane device by using the base station.
  • the UE re-enters the active state in response to the paging message, and sends a service request to the local control plane device, where the service request carries the S-TMSI.
  • the local control plane device sends a context establishment request to the base station.
  • the local control plane finds a corresponding saved bearer context (including an EPS bearer QoS, a bearer identifier, an SGW user plane address, a user plane TEID-U) and a security context according to the S-TMSI, and sends an initial context setup request message to the eNB according to the S-TMSI, and sends an initial context setup request message to the eNB according to the S-TMSI, and sends an initial context setup request message to the eNB according to the
  • the saved bearer context establishes a transport tunnel between the eNB and the SGW/PGW and transmits the security context to the eNB to ensure secure transmission between the UE and the eNB.
  • the base station sends a context establishment complete message to the local control plane device.
  • the eNB After completing the user plane radio bearer setup process, the eNB returns an initial context setup complete message to the local control plane, where the initial context setup complete message carries the address and TEID of the eNB for transmitting the downlink data by the S1 interface, and the EPS accepted by the eNB. Bearer list, optional list of rejected EPS bearers.
  • the local control plane device sends a modify bearer request to the SGW/PGW, where the modify bearer request carries the TEID-C allocated by the SGW, and the EPS bearer list accepted by the eNB (the address of the eNB and the user plane TEID of the downlink data transmitted by the S1 interface) ), an optional list of EPS bearers rejected by the eNB.
  • the local control plane device sends a modify user status notification to the remote control plane device.
  • the local control plane device since the UE transitions from the Idle state to the Active state, the local control plane device notifies the MME of the latest state of the UE. This is to prevent the MME from repeatedly paging the UE when it needs to transmit signaling to the UE. Secondly, in the above process, if there is a rejected EPS bearer, the MME needs to delete the EPS bearer that has been rejected in the core network.
  • FIG. 3 is a schematic flowchart of another control method according to the first embodiment of the present invention.
  • the flow of the control method in this embodiment may include:
  • the user equipment sends a tracking area update request to the remote control plane device.
  • the UE when the UE crosses the domain to reach the new tracking area, the UE sends a TA (Tracking Area) update request to the MME to trigger the TA update process.
  • TA Tracking Area
  • the remote control plane device sends a create session request to the target local control plane device.
  • the MME saves the context information of the UE, and sends a create session request to the target local control plane device, where the create session request carries the MME address and the control plane TEID, and the bearer context (including the address of the source PGW1).
  • the target local control plane device sends a create session request to the target gateway device.
  • the target local control plane passes the create session request to SGW2.
  • the SGW2 sends a modify bearer request according to the address of the PGW1, and establishes an S5 connection of the SGW2 to the PGW1.
  • the remote control plane device sends a delete session request to the source local control plane device.
  • the MME sends a delete session request to the source local control plane device, where the delete session request carries the TEID-C allocated by the MME.
  • the source local control plane device deletes the context information of the user equipment.
  • the source local control plane device deletes the corresponding context information according to the TEID-C allocated by the MME.
  • the source local control plane device sends a delete session request to the source gateway device.
  • the source local control plane device sends a delete session request to the SGW1.
  • the source gateway device deletes the context information of the user equipment.
  • the SGW 1 deletes the corresponding context information.
  • the remote control plane device sends an initial context setup request to the base station by using the target local control plane device.
  • the MME sends an initial context (including the user plane SGW address and the TEID-U) to the base station by using the target local control plane device, where the initial context creation request includes a TA update accept message (GUTI, TAI list, EPS bearer status) .
  • GUI TA update accept message
  • the base station performs a radio resource control connection configuration with the user equipment.
  • the eNB after receiving the initial context setup request, performs RRC connection reconfiguration to establish a radio bearer with the UE.
  • the UE deletes the local resource of the bearer that is not marked as "active" in the received EPS bearer status, and returns an RRC Connection Reconfiguration Complete message.
  • the base station sends an initial context setup response to the remote control plane device.
  • the eNB sends an initial context setup response to the MME to return the address and TEID of the eNB that transmits the downlink data by the S1 interface.
  • the remote control plane device sends a modify bearer request to the target local control plane device.
  • the MME sends a modify bearer request to the target local control plane device, where the modify bearer request includes an EPS bearer identifier, an address of the eNB, and a TEID.
  • the target local control plane device forwards the modify bearer request to the source gateway device.
  • the source gateway device sends a modify bearer response to the target local control plane device.
  • the SGW1/PGW1 sends a modify bearer response to the target local control plane device, where the modified bearer response includes an EPS bearer identifier. Then, the target local control plane device notifies the MME of the modification bearer response, so that the MME instructs the UE to perform the PDN connection release process between SGW2 and PGW1, and deletes all bearer contexts in the PDN connection process. And instructing the UE to initiate a PDN connection re-establishment procedure, and establishing a PDN connection between the local SGW2 and the PGW2.
  • the user equipment sends a network connection request to the remote control plane device by using the base station.
  • the UE sends a PDN connection request to the MME through the eNB.
  • the remote control plane device sends a create session request to the target local control plane device.
  • the MME sends a create session request to the target local control plane device, where the create session request includes the address of the target PGW2, the EPS bearer identifier, the APN of the user, the MME TEID-C of the control plane, the default EPS bearer QoS, and the PDN type. information.
  • the target local control plane device sends a create session request to the target gateway device.
  • the target local control plane device passes the create session request message to SGW2.
  • the target gateway device sends a create session response to the target local control plane device.
  • the SGW2 sends a modify bearer request according to the address of the PGW2, establishes an S5 connection of the SGW2 to the PGW2, and thereafter returns a create session response to the target local control plane device.
  • the returned creation session response includes information such as a PDN type, a user plane S-GW address and a TEID and a control plane S-GW TEID, an EPS bearer identifier, an EPS bearer QoS, a P-GW address, and a TEID.
  • the remote control plane device sends a bearer setup request to the base station.
  • the MME sends a bearer setup request to the eNB, where the bearer setup request carries a PDN connection accept message (APN, PDN type, PDN address, EPS bearer identifier), including EPS bearer QoS, user plane S-GW address, and TEID.
  • PDN connection accept message APN, PDN type, PDN address, EPS bearer identifier
  • the base station performs a radio resource control connection configuration with the user equipment.
  • the eNB completes an RRC connection reconfiguration process with the UE.
  • the base station sends a bearer setup complete message to the remote control plane device.
  • the eNB returns a bearer setup complete message to the MME, including an address and a TEID of the eNB that transmits the downlink data on the S1-U interface.
  • the UE then sends a direct transfer message to the eNB, including a PDN Connection Complete message.
  • the eNB sends a bearer setup complete message to the MME, where the bearer setup complete message carries the PDN connection complete message.
  • the remote control plane device sends a modify bearer request to the local control plane device.
  • the MME sends a modify bearer request to the local control plane device, where the modify bearer request includes an EPS bearer identifier, an address of the eNB, and a TEID.
  • the target local control plane device acquires context information of the user equipment.
  • the manner in which the target local control plane device acquires the context information of the UE includes the following two types:
  • the modified bearer request sent by the MME carries the context information of the UE, and the target local control plane device can obtain the context information of the UE by parsing and modifying the bearer request.
  • the target local control plane device receives the context information of the UE directly sent by the MME.
  • the context information of the UE includes a security context, a bearer context (including the user plane address of the SGW and the user plane TEID-U), a TAI list, a GUTI, a control plane TEID-C allocated by the MME, and a TEID-C allocated by the SGW.
  • the local control plane device saves this information.
  • the target local control plane device forwards the modify bearer request to the SGW2/PGW2, and the SGW2/PGW2 returns a modified bearer response, including the EPS bearer identifier.
  • the paging and service request procedure in the embodiment of the present invention is responsible for the local control plane, and has the functions of S1 signaling and S11 signaling proxy, which greatly reduces the signaling transmission path and time, and not only avoids the prior art.
  • the signaling interaction caused by frequent replacement between MMEs also avoids frequent update of user location information by the HSS due to UE mobility.
  • FIG. 4 is a schematic flowchart of a control method according to a second embodiment of the present invention. The method is applied to a wireless communication system, where the wireless communication system includes a user equipment, a base station, a gateway device, a local control plane device, and a remote control plane. device.
  • the wireless communication system includes a user equipment, a base station, a gateway device, a local control plane device, and a remote control plane. device.
  • FIG. 11 is a schematic structural diagram of a wireless communication system according to a second embodiment of the present invention.
  • the local control plane device is introduced on the basis of forwarding a separate mobile network architecture, and the control plane function of the gateway device is implemented (GW-C).
  • GW-C control plane function of the gateway device
  • the control plane device or Central Control (CC)
  • SGW-U SGW's forwarding plane function
  • PGW-U Packet Control
  • the (PGW-U) function is merged into a gateway device (GW-U), and the Mobile flow interface is a reference point after the gateway data forwarding is separated.
  • the flow of the control method in this embodiment as shown in FIG. 4 may include:
  • the user equipment sends an attach request to the base station.
  • the UE sends an attach request to the eNB.
  • the base station sends an attach request to the local control plane device.
  • the eNB sends an attach request to the local control plane device.
  • the local control plane device sends an attach request to the remote control plane device.
  • the local control plane device forwards the attach request to the remote control plane device, so that the authentication and authentication process is completed between the remote control plane device and the UE.
  • the remote control plane device sends an uplink data forwarding rule to the local control plane device.
  • the remote control plane device allocates an uplink tunnel identifier and sends an uplink data forwarding rule, where the uplink data forwarding rule includes index information.
  • the local control plane device sends an uplink data forwarding rule to the gateway device.
  • the local control plane device sends an uplink data forwarding rule to the GW-U, so that the GW-U forwards according to the uplink forwarding rule.
  • the remote control plane device sends an initial context setup request to the base station by using the local control plane device.
  • the remote control plane device sends an initial context setup request to the eNB, where the initial context setup request includes the allocated uplink tunnel identity.
  • the base station performs a radio resource control connection configuration with the user equipment.
  • the RRC connection configuration is completed between the eNB and the UE.
  • the base station sends an initial context setup response to the remote control plane device by using the local control plane device.
  • the eNB returns an initial context setup response to the control plane, wherein the initial context setup response includes a downlink tunnel ID assigned by the eNB, and an attach complete message.
  • the remote control plane device sends a downlink data forwarding rule to the local control plane device.
  • the downlink data forwarding rule includes index information to indicate a manner in which the GW-U sends an IP packet to the UE.
  • the local control plane device acquires context information of the user equipment.
  • the manner in which the local control plane device acquires the context information of the UE includes the following two types:
  • the modified downlink data forwarding rule sent by the remote control plane device carries the context information of the UE, and the local control plane device can obtain the context information of the UE by parsing and modifying the downlink data forwarding rule.
  • the local control plane device receives the context information of the UE directly sent by the remote control plane device.
  • the context information of the UE includes the UE security context, the bearer context, the TAI list, the GUTI, and the uplink and downlink forwarding rule index information, and the local control plane device saves the information.
  • the local control plane device sends a modified downlink data forwarding rule to the gateway device.
  • the local control plane device notifies the GW-U of the downlink data forwarding rule.
  • the local control plane device After receiving the downlink data arrival notification message, the local control plane device initiates paging to the user equipment.
  • the GW-U matches the downlink forwarding rule and the buffered downlink data, and sends a downlink data arrival notification to the local control plane device, where the downlink data arrival notification includes index information corresponding to the downlink forwarding rule.
  • the local control plane determines the TAI list of the corresponding UE according to the index information of the downlink forwarding rule, and initiates a paging message to all the eNBs in the TAI list of the UE, where the message carries the S-TMSI (partial information of the GUTI), so that the eNB A paging is initiated for the UE.
  • S-TMSI partial information of the GUTI
  • the user equipment sends a service request to the local control plane device by using the base station.
  • the UE re-enters the Active state in response to the paging message, and sends a service request to the local control plane device, where the service request carries the S-TMSI (partial information of the GUTI).
  • S-TMSI partial information of the GUTI
  • the local control plane device sends a context establishment request to the base station.
  • the local control plane finds a corresponding saved bearer context (including an EPS bearer QoS, an EPS bearer identifier, an uplink tunnel identifier) and a security context according to the S-TMSI, and sends an initial context setup request to the eNB, so that the eNB performs the saved bearer according to the saved bearer.
  • the context establishes a transmission tunnel between the eNB and the GW-U and transmits the security context to the eNB to ensure secure transmission between the UE and the eNB.
  • the base station sends a context setup complete message to the local control plane device.
  • the eNB After the eNB completes the user plane radio bearer setup process, the eNB returns to the initial context.
  • the local control plane device sends a modified downlink data forwarding rule to the remote control plane device.
  • the local control plane device After acquiring the tunnel identifier of the eNB, the local control plane device updates the downlink forwarding rule of the UE according to the buffered downlink forwarding rule index, and establishes a transmission tunnel between the eNB and the GW-U to enable the GW-U to the eNB. Send a buffered message.
  • the local control plane device sends a modify user status notification to the remote control plane device.
  • the local control plane device since the UE transitions from the Idle state to the Active state, the local control plane device notifies the remote control plane device of the latest state of the UE.
  • FIG. 5 is a schematic flowchart of another control method according to a second embodiment of the present invention.
  • the flow of the control method in this embodiment may include:
  • the user equipment sends a tracking area update request to the remote control plane device.
  • the UE when the UE crosses the domain to reach the new tracking area, the UE sends a TA update request to the remote control plane device to trigger the TA update procedure.
  • the remote control plane device sends an uplink data forwarding rule to the target local control plane device.
  • the remote control plane device allocates an uplink tunnel identifier, and sends an uplink data forwarding rule to the target local control plane device, where the uplink data forwarding rule includes index information.
  • the target local control plane device sends an uplink data forwarding rule to the target gateway device.
  • the target local control plane notifies the GW-U2 to accept the packet of the tunnel and forward the packet according to the uplink forwarding rule.
  • the remote control plane device sends a context release command to the source local control plane device.
  • the source local control plane device deletes the context information of the user equipment.
  • the source local control plane device deletes the context information of the corresponding UE according to the context release command.
  • the source local control plane device sends a context release command to the source gateway device.
  • the source local control plane device sends a context release command to GW-U1.
  • the source gateway device deletes the context information of the user equipment.
  • the GW-U1 deletes the context information of the corresponding UE according to the context release command.
  • the remote control plane device sends an initial context setup request to the base station by using the target local control plane device.
  • the remote control plane device sends an initial context setup request to the base station, where the initial context setup request includes the allocated uplink tunnel identifier and carries a TAU accept message, where the TAU accept message includes a GUTI, a PDN type, a PDN address, an APN, Information such as TAI list.
  • the base station performs a radio resource control connection configuration with the user equipment.
  • the base station sends an initial context setup response to the remote control plane device.
  • the eNB returns an initial context setup response to the remote control plane device, wherein the initial context setup response includes the downlink tunnel ID assigned by the eNB.
  • the remote control plane device sends a modified downlink data forwarding rule to the target local control plane device.
  • the remote control plane device sends the modified downlink data forwarding rule to the target local control plane device, where the modified downlink data forwarding rule includes the index information, and indicates the manner in which the GW-U sends the IP packet to the UE.
  • the target local control plane device forwards the modified downlink data forwarding rule to the target gateway device.
  • the target local control plane device notifies the GW-U2 of the modified downlink forwarding rule.
  • the user equipment sends a network connection request to the remote control plane device by using the base station.
  • the remote control plane device instructs the UE to perform a PDN connection release process, deletes all bearers in the source PDN connection process, and instructs the UE to initiate a PDN connection re-establishment process.
  • the UE sends a network connection request to the remote control plane device through the eNB.
  • the remote control plane device sends a downlink data forwarding rule to the target local control plane device.
  • the remote control plane device allocates an uplink tunnel identifier, and sends a downlink data forwarding rule, where the downlink data forwarding rule includes an index information, and indicates a manner in which the GW-U sends the IP packet to the UE.
  • the target local control plane device sends a downlink data forwarding rule to the target gateway device.
  • the target local control plane device notifies the GW-U2 to accept the packet of the tunnel and forward the packet according to the downlink forwarding rule.
  • the remote control plane device sends a bearer setup request to the base station.
  • the remote control plane device sends a bearer setup request to the eNB, where the bearer setup request carries a PDN connection accept message (APN, PDN type, PDN address, EPS bearer identifier),
  • PDN connection accept message includes the assigned uplink tunnel identity.
  • the base station performs a radio resource control connection configuration with the user equipment.
  • the base station sends a bearer setup complete message to the remote control plane device.
  • the eNB returns a bearer setup response to the remote control plane device, where the bearer setup response includes the address and TEID of the eNB transmitting the downlink data on the S1-U interface. Then, the UE sends a direct transmission message to the eNB, where the direct transmission message includes a PDN connection complete message.
  • the eNB delivers the PDN connection complete message to the remote control plane device.
  • the remote control plane device sends a modified downlink data forwarding rule to the local control plane device.
  • the modified downlink data forwarding rule includes index information to indicate a manner in which the GW-U sends an IP packet to the UE.
  • the target local control plane acquires context information of the user equipment.
  • the manner in which the target local control plane device acquires the context information of the UE includes the following two types:
  • the modified downlink data forwarding rule sent by the remote control plane device carries the context information of the UE, and the target local control plane device can obtain the context information of the UE by parsing and modifying the downlink data forwarding rule.
  • the target local control plane device receives the context information of the UE directly sent by the MME.
  • the context information of the UE includes the UE security context, the bearer context, the TAI list, the GUTI, and the uplink and downlink forwarding rule index information, and the local control plane device saves the information.
  • the target local control plane device sends a modified downlink data forwarding rule to the target gateway device.
  • the signaling proxy function of the local control plane device can implement the paging and service request process of the user directly in the local area without the transit of the remote control plane device, which greatly shortens the signaling transmission path and time.
  • FIG. 6 is a schematic structural diagram of a local control plane device according to an embodiment of the present invention, where the local control plane device is used to implement the control method described in FIG. 1 to FIG. 5.
  • the local control plane device in the embodiment of the present invention may include at least an information acquiring module 510 and a bearer establishing module 520, where:
  • the information obtaining module 510 is configured to acquire context information of the user equipment from the remote control plane device according to an interaction process between the user equipment and the remote control plane device.
  • the context information of the user equipment includes at least a security context and a bearer context (including SGW user plane address and user plane TEID-U), TAI (Tracking Area Identity) list, GUTI (Globally Unique Temporary Identity), MME assigned control plane TEID-C and SGW TEID-C.
  • the TEID (Tunnel Endpoint ID) is a tunnel endpoint identifier.
  • the interaction process between the user equipment and the remote control plane device includes an attach request process initiated by the user equipment and a packet data network (PDN) connection establishment process.
  • PDN packet data network
  • the information obtaining module 510 can further include an information forwarding unit 511 and an information acquiring unit 512 as shown in FIG. 7, wherein:
  • the information forwarding unit 511 is configured to forward the forwarding surface modification information sent by the remote control plane device to the gateway device during the interaction between the user equipment and the remote control plane device, where the forwarding plane
  • the modification information carries context information of the user equipment.
  • the information obtaining unit 512 is configured to obtain context information of the user equipment by parsing the forwarding plane modification information.
  • the information acquisition module 510 may further include an information forwarding unit 513 and an information receiving unit 514 as shown in FIG. 8, wherein:
  • the information forwarding unit 513 is configured to forward the forwarding surface modification information sent by the remote control plane device to the gateway device during the interaction between the user equipment and the remote control plane device.
  • the information receiving unit 514 is configured to receive context information of the user equipment sent by the remote control plane device.
  • the bearer establishing module 520 is configured to establish, by the local control plane device, a radio bearer between the base station where the current camping cell of the user equipment is located and the user equipment according to the context information of the user equipment.
  • the bearer establishing module 520 After receiving the service request sent by the user equipment by the base station where the current camping cell is located, the bearer establishing module 520 sends a context establishment request to the base station according to the context information of the user equipment, so that the base station establishes the user equipment with the user equipment. Wireless bearer between.
  • the local control plane device in the embodiment of the present invention may further include a paging initiation module 530, configured to receive a downlink data arrival notification message according to the context information of the user equipment.
  • the user equipment initiates paging to change the user equipment from an idle state to an active state, and sends a service request by the base station where the currently camped cell is located.
  • the local control plane device in the embodiment of the present invention may further include an information deletion module 540, configured to delete the saved location after receiving the delete context request sent by the remote control plane device.
  • Context information of the user equipment sending a delete context request to the gateway device, so that the gateway device deletes the saved context information of the user equipment.
  • the source gateway here includes the source SGW and does not include the source PGW.
  • the local control plane device in the embodiment of the present invention may further include a notification sending module 550, configured to send a modified user status notification to the remote control plane device, so that the remote control The device modifies the status information of the user equipment.
  • a notification sending module 550 configured to send a modified user status notification to the remote control plane device, so that the remote control The device modifies the status information of the user equipment.
  • FIG. 7 is a schematic structural diagram of another local control plane device according to an embodiment of the present invention.
  • the local control plane device may include: at least one processor 601, such as a CPU, at least one network interface 603, and a memory. 604, at least one communication bus 602. Among them, the communication bus 602 is used to implement connection communication between these components.
  • the network interface 603 can be a wireless interface, such as an antenna device, for signaling or data communication with other node devices.
  • the memory 604 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 604 may also be at least one storage device located away from the foregoing processor 601.
  • a set of program codes is stored in the memory 604, and the processor 601 is configured to call the program code stored in the memory 604 to perform the following operations:
  • the interaction process between the user equipment and the remote control plane device includes:
  • the user equipment initiates an attach request process and a packet data network connection establishment process.
  • the specific operation of the processor 601 to obtain the context information of the user equipment from the remote control plane device according to the interaction process between the user equipment and the remote control plane device is:
  • the forwarding plane modification information sent by the remote control plane device is forwarded to the gateway device, and the forwarding plane modification information carries the user Context information of the device;
  • the context information of the user equipment is obtained by parsing the forwarding plane modification information.
  • the specific operation of the processor 601 to obtain the context information of the user equipment from the remote control plane device according to the interaction process between the user equipment and the remote control plane device is:
  • the specific operation of the processor 601 to establish a radio bearer between the user equipment and the base station where the user equipment is currently camped according to the context information of the user equipment is:
  • the processor 601 before receiving the service request sent by the user equipment by the base station where the user equipment is currently camped by the user equipment, the processor 601 further performs:
  • the processor 601 after acquiring the context information of the user equipment from the remote control plane device, according to the interaction process between the user equipment and the remote control plane device, further performs:
  • the processor 601 further performs:
  • the remote control plane device includes:
  • the context information of the user equipment includes:
  • the security context of the user equipment and the bearer context of the user equipment includes a user plane address of the forwarding plane gateway, a tunnel identifier, a tracking area list, a global unique temporary identifier, and a control plane identifier assigned by the remote control plane.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a program, and the program includes a plurality of instructions for executing a part of a control method described in the embodiments of the present invention. Or all the steps.
  • the local control plane device obtains the context information of the user equipment from the remote control plane device according to the interaction process between the user equipment and the remote control plane device, and then establishes the current user equipment according to the context information of the user equipment.
  • the radio bearer between the base station where the cell is located and the user equipment can reduce the signaling delay when the user equipment changes from the idle state to the active state, and can avoid the problem that the user equipment moves cause excessive signaling interaction.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开了一种控制方法，所述方法应用于无线通信系统，所述无线通信系统包括用户设备、基站、网关设备、本地控制面设备和远端控制面设备，所述方法包括：所述本地控制面设备根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息；所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载。采用本发明，可以实现减少用户设备从空闲状态变为激活状态时的信令传输时延，并可以避免用户设备移动导致信令交互过多的问题。

Description

一种控制方法及本地控制面设备 技术领域
本发明涉及无线通信技术领域，尤其涉及一种控制方法及本地控制面设备。
背景技术
目前，3GPP(3rd Generation Partnership Project，第三代合作伙伴项目)提出了一种全新的EPS(Evolved Packet System，演进分组系统)网络，包括UE(User Equipment，用户设备)、eNB(Evolutional Node B，基站)、SGW(Serving Gateway，服务网关)、PGW(Packet Data Network Gateway，分组数据网关)和MME(Mobility Management Entity，移动性管理实体)。其中，SGW用于作为接入网络间的转发面锚点，PGW用于作为接入网络和非接入网络之间的转发面锚点。为了保证UE的IP地址的连续性，PGW部署位置较高，这样即使UE移动中也始终与PGW保持连接，从而保证IP不变，然而，若UE访问本地服务器，则会出现路由的迂回的问题，即UE的数据会先到位置较高的PGW，再返回到本地服务器，导致报文传输时延变长。
为了解决这个问题，3GPP定义了SIPTO(Selected IP Traffic Offload，选择性旁路)功能，其核心思想是低位部署SGW和PGW，当UE访问本地服务器时，由本地PGW分配IP地址，数据仅经过本地SGW和PGW，从而避免了路由迂回，解决了报文传输时延过长的问题，然而，低位部署SGW和PGW的缺点是与集中部署的MME距离较远，导致UE从空闲(idle)状态变为激活(active)状态时信令传输时延变长。因此，另一种减少信令传输时延的方法是将MME下移到低位与本地网关部署在一起。然而，这也使得每个MME管辖的UE数量大大减少，UE移动时容易在不同MME之间切换，导致信令交互增多，增大了系统负荷。
发明内容
本发明实施例提供了一种控制方法及本地控制面设备，可以实现减少用户设备从空闲状态变为激活状态时的信令传输时延，并可以避免用户设备移动导 致控制面频繁切换引起的信令交互过多的问题。
本发明实施例第一方面提供了一种控制方法，所述方法应用于无线通信系统，所述无线通信系统包括用户设备、基站、网关设备、本地控制面设备和远端控制面设备，所述方法包括：
所述本地控制面设备根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息；
所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载。
在第一方面的第一种可能实现方式中，所述用户设备和所述远端控制面设备的交互过程包括：
所述用户设备发起的附着请求过程和分组数据网络连接建立过程。
在第一方面的第二种可能实现方式中，所述本地控制面设备根据所述用户设备和远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息包括：
在所述用户设备和所述远端控制面设备的交互过程中，所述本地控制面设备将所述远端控制面设备发送的转发面修改信息转发至所述网关设备，所述转发面修改信息携带有所述用户设备的上下文信息；
所述本地控制面设备通过解析所述转发面修改信息，获取所述用户设备的上下文信息。
在第一方面的第三种可能实现方式中，所述本地控制面设备根据所述用户设备和远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息包括：
在所述用户设备和所述远端控制面设备的交互过程中，所述本地控制面设备将所述远端控制面设备发送的转发面修改信息转发至所述网关设备；
所述本地控制面设备接收所述远端控制面设备发送的所述用户设备的上下文信息。
在第一方面的第四种可能实现方式中，所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备与所述用户设备当前驻留小区所在的基站之间的无线承载包括：
所述本地控制面设备在接收到所述用户设备通过所述用户设备当前驻留 小区所在的基站发送来的业务请求之后，根据所述用户设备的上下文信息向所述用户设备当前驻留小区所在的基站发送上下文建立请求，以使所述用户设备当前驻留小区所在的基站建立与所述用户设备之间的无线承载。
结合第一方面的第四种可能实现方式，在第五种可能实现方式中，所述本地控制面设备在接收到所述用户设备通过所述用户设备当前驻留小区所在的基站发送来的业务请求之前，还包括：
所述本地控制面设备在接收到下行数据到达通知消息，根据所述用户设备的上下文信息向所述用户设备发起寻呼，以使所述用户设备从空闲状态转换为激活状态，并通过当前驻留小区所在的基站发送业务请求。
在第一方面的第六种可能实现方式中，所述本地控制面设备根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息之后，还包括：
所述本地控制面在接收到所述远端控制面设备发送的删除上下文请求之后，删除保存的所述用户设备的上下文信息；
所述本地控制面设备发送删除上下文请求至所述网关设备，以使所述网关设备删除保存的所述用户设备的上下文信息。
在第一方面的第七种可能实现方式中，所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载之后，还包括：
所述本地控制面设备向所述远端控制面设备发送修改用户状态通知，以使所述远端控制面设备修改所述用户设备的状态信息。
结合第一方面的第一至第七种的任意一种可能实现方式，在第八种可能实现方式中，所述远端控制面设备包括：
传统EPC网络架构的移动性管理实体；或者
控制转发解耦网络架构的集中控制面设备。
在第一方面的第九种可能实现方式中，所述用户设备的上下文信息包括：
用户设备的安全上下文和用户设备的承载上下文，所述用户设备的承载上下文包括转发面网关的用户面地址、隧道标识、跟踪区列表、全球唯一临时标识以及远端控制面分配的控制面标识。
本发明实施例第二方面提供了一种本地控制面设备，所述本地控制面设备应用于无线通信系统，所述无线通信系统还包括用户设备、基站、网关设备和远端控制面设备，所述本地控制面设备包括：
信息获取模块，用于根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息；
承载建立模块，用于所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载。
在第二方面的第一种可能实现方式中，所述用户设备和所述远端控制面设备的交互过程包括：
所述用户设备发起的附着请求过程和分组数据网络连接建立过程。
在第二方面的第二种可能实现方式中，所述信息获取模块包括：
信息转发单元，用于在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备，所述转发面修改信息携带有所述用户设备的上下文信息；
信息获取单元，用于通过解析所述转发面修改信息，获取所述用户设备的上下文信息。
在第二方面的第三种可能实现方式中，所述信息获取模块包括：
信息转发单元，用于在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备；
信息获取单元，用于接收所述远端控制面设备发送的所述用户设备的上下文信息。
在第二方面的第四种可能实现方式中，所述承载建立模块，具体用于在接收到所述用户设备通过所述用户设备当前驻留小区所在的基站发送来的业务请求之后，根据所述用户设备的上下文信息向所述用户设备当前驻留小区所在的基站发送上下文建立请求，以使所述用户设备当前驻留小区所在的基站建立与所述用户设备之间的无线承载。
结合第二方面的第四种可能实现方式，在第五种可能实现方式中，所述本地控制面设备，包括：
寻呼发起模块，用于在接收到下行数据到达通知消息，根据所述用户设备 的上下文信息向所述用户设备发起寻呼，以使所述用户设备从空闲状态转换为激活状态，并通过当前驻留小区所在的基站发送业务请求。
在第二方面的第六种可能实现方式中，所述本地控制面设备还包括：
信息删除模块，用于在接收到所述远端控制面设备发送的删除上下文请求之后，删除保存的所述用户设备的上下文信息；
所述本地控制面设备发送删除上下文请求至所述网关设备，以使所述网关设备删除保存的所述用户设备的上下文信息。
在第二方面的第七种可能实现方式中，所述本地控制面设备还包括：
通知发送模块，用于向所述远端控制面设备发送修改用户状态通知，以使所述远端控制面设备修改所述用户设备的状态信息。
结合第二方面的第一至第七种的任意一种可能实现方式，在第八种可能实现方式中，所述远端控制面设备包括：
传统EPC网络架构的移动性管理实体；或者
控制转发解耦网络架构的集中控制面设备。
在第二方面的第九种可能实现方式中，所述用户设备的上下文信息包括：
用户设备的安全上下文和用户设备的承载上下文，所述用户设备的承载上下文包括转发面网关的用户面地址、隧道标识、跟踪区列表、全球唯一临时标识以及远端控制面分配的控制面标识。
由上可见，本发明实施例中，本地控制面设备根据用户设备和远端控制面设备的交互过程，从远端控制面设备获取用户设备的上下文信息，进而根据所述用户设备的上下文信息，建立用户设备当前驻留小区所在的基站与用户设备之间的无线承载，可以实现减少用户设备从空闲状态变为激活状态时的信令传输时延，并可以避免用户设备移动导致控制面频繁切换引起的信令交互过多的问题。
附图说明
为了更清楚地说明本发明实施例，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些 附图获得其他的附图。
图1是本发明实施例提供的一种控制方法的流程示意图；
图2是本发明第一实施例提供的一种控制方法的流程示意图；
图3是本发明第一实施例提供的另一种控制方法的流程示意图；
图4是本发明第二实施例提供的一种控制方法的流程示意图；
图5是本发明第二实施例提供的另一种控制方法的流程示意图；
图6是本发明实施例提供的一种本地控制面设备的结构示意图；
图7是本发明实施例提供的一种信息获取模块的结构示意图；
图8是本发明实施例提供的另一种信息获取模块的结构示意图；
图9本发明实施例提供的另一种本地控制面设备的结构示意图；
图10是本发明第一实施例提供的一种无线通信系统的架构示意图；
图11是本发明第二实施例提供的一种无线通信系统的架构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，简称为“GSM”)系统、码分多址(Code Division Multiple Access，简称为“CDMA”)系统、宽带码分多址(Wideband Code Division Multiple Access，简称为“WCDMA”)系统、通用分组无线业务(General Packet Radio Service，简称为“GPRS”)、长期演进(Long Term Evolution，简称为“LTE”)系统、LTE频分双工(Frequency Division Duplex，简称为“FDD”)系统、LTE时分双工(Time Division Duplex，简称为“TDD”)、通用移动通信系统(Universal Mobile Telecommunication System，简称为“UMTS”)或全球互联微波接入(Worldwide Interoperability for Microwave Access，简称为“WiMAX”)通信系统等。
本发明实施例提供的用户设备(User Equipment，简称为“UE”)包括终端 (Terminal)、移动台(Mobile Station，简称为“MS”)或移动终端(Mobile Terminal)等，该用户设备可以经无线接入网(Radio Access Network，简称为“RAN”)与一个或多个核心网进行通信，例如，用户设备可以是移动电话(或称为“蜂窝”电话)或具有移动终端的计算机等，例如，用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语音和/或数据。本发明实施例提供的基站可以是LTE中的演进型基站(Evolutional Node B，简称为“eNB”)。
图1是本发明实施例中一种控制方法的流程示意图，该方法应用于无线通信系统，所述无线通信系统包括用户设备、基站、网关设备、本地控制面设备和远端控制面设备，如图所示本实施例中的控制方法的流程可以包括：
S101，本地控制面设备根据用户设备和远端控制面设备的交互过程，从远端控制面设备获取用户设备的上下文信息。
其中，用户设备的上下文信息至少包括安全上下文、承载上下文(包含了SGW的用户面地址和用户面TEID-U)、TAI(Tracking Area Identity，跟踪区标识)列表、GUTI(Globally Unique Temporary Identity，全球唯一临时标识)、MME分配的控制面TEID-C和SGW分配的TEID-C。其中，TEID(Tunnel Endpoint ID)为隧道端点标识符。
可选地，上述用户设备和远端控制面设备的交互过程包括用户设备发起的附着请求过程和分组数据网络(Package Data Network，PDN)连接建立过程。
具体地，本地控制面设备根据用户设备和远端控制面设备的交互过程，从远端控制面设备获取用户设备的上下文信息的方式包括以下两种：
方式一：在用户设备和远端控制面设备的交互过程中，本地控制面设备将远端控制面设备发送的转发面修改信息转发至网关设备，该转发面修改信息携带有用户设备的上下文信息，进而本地控制面设备通过解析转发面修改信息，可以获取用户设备的上下文信息。
需要指出的是，这里的转发面修改信息，可以是下文中图2所描述应用场景中的修改承载请求，即本地控制面设备在将远端控制面设备发送的修改承载请求转发至网关设备时，解析其中携带的用户设备的上下文信息。这里的转发 面修改信息，也可以是下文图4所描述应用场景中的修改下行数据转发规则消息，即本地控制面设备在将远端控制面设备发送的修改下行数据转发规则转发至网关设备时，解析其中携带的用户设备的上下文信息。
方式二，在用户设备和远端控制面设备的交互过程中，本地控制面设备将远端控制面设备发送的转发面修改信息转发至网关设备，接收远端控制面设备直接发送来的用户设备的上下文信息。
S102，本地控制面设备根据用户设备的上下文信息，建立用户设备当前驻留小区所在的基站与用户设备之间的无线承载。
具体地，本地控制面设备在接收到用户设备通过其当前驻留小区所在的基站发送来的业务请求之后，根据用户设备的上下文信息向该基站发送上下文建立请求，以使该基站建立与用户设备之间的无线承载。
需要指出的是，用户设备通过其当前驻留小区所在的基站发送业务请求可以是下行数据到达通知所触发的。具体实现过程中，当用户设备处于空闲状态时，本地控制面设备在接收到下行数据到达通知消息之后，根据用户设备的上下文信息向用户设备发起寻呼，以使用户设备从空闲状态转换为激活状态，并通过当前驻留小区所在的基站发送业务请求。
另外，当用户设备进行跨域移动到新的跟踪区范围时，用户设备归属的基站将发生变更，此时本地控制面设备和网关设备也将发生变更，因此源本地控制面设备和源网关设备会执行删除保存的用户设备的上下文信息的过程。具体实现过程中，源本地控制面在接收到远端控制面设备发送的删除上下文请求之后，删除保存的用户设备的上下文信息，并发送删除上下文请求至源网关设备，以使源网关设备删除保存的用户设备的上下文信息。需要指出的是，这里的源网关包括源SGW，而不包括源PGW。
进一步地，本地控制面设备在建立基站与用户设备之间的无线承载之后，本地控制面设备处理用户设备的寻呼和业务请求流程，当用户设备从空闲状态转换为激活状态后，本地控制面设备向远端控制面设备发送修改用户状态通知，以使远端控制面设备修改用户设备的状态信息。
由上可见，本发明实施例在现有无线网络系统中引入本地控制面设备，具有以下功能：基站和远端控制面设备之间的信令代理，以及远端控制面设备和 本地的网关设备之间的信令代理。本地控制面设备可以保存用户的承载上下文、安全上下文和用户TAI列表，负责用户的寻呼、业务请求流程，其他流程仍由现有无线网络系统中的远端控制面设备处理。本发明实施例通过将现有无线网络系统中的远端控制面设备的部分功能分布式部署，使得寻呼和业务请求功能能够在本地处理，从而节省了信令传输所需的时间，为超低时延应用提供更短的从空闲状态到激活状态所需的转换时间，降低了首包传输延时。
图2是本发明第一实施例提供的一种控制方法的流程示意图，该方法应用于无线通信系统，所述无线通信系统包括用户设备、基站、网关设备、本地控制面设备和远端控制面设备。
图10是本发明第一实施例的无线通信系统的架构示意图，如图该架构在宏网络的SIPTO(Selected IP Traffic Offload，选择性流量旁路)的网关集中部署场景的基础上，引入新的功能实体本地控制面设备(Local Control，LC)，本地控制面设备集成了SGW与PGW分流卸载的功能，并靠近接入网。图中S1接口是远端控制面和基站之间的接口，S11接口是远端控制面和SGW之间的接口，而本地控制面是两个接口之间的信令代理，面向基站和SGW作为MME，面向远端控制面则作为基站和SGW。其中，网关设备包括SGW/PGW，远端控制面设备包括传统网络架构的MME。
如图2所示本实施例中的控制方法的流程可以包括：
S201，用户设备发送附着请求至基站。
具体地，UE发送附着请求至eNB以发起网络附着过程，其中，附着请求中携带有UE的IMSI(International Mobile Subscriber Identification Number，国际移动用户识别码)、核心网能力、PDN类型和所选取的PLMN(Public Land Mobile Network，公共陆地移动网络)。
S202，基站发送附着请求至本地控制面设备。
具体地，eNB将S1AP的初始UE消息发送给本地控制面设备，其中，S1AP的初始UE消息中携带有附着请求。
S203，本地控制面设备发送附着请求至远端控制面设备。
具体地，本地控制面设备再将附着请求消息发送给MME。
S204，本地控制面设备对用户设备进行鉴权及安全过程建立。
具体地，若网络中没有UE的上下文信息，则MME对UE进行鉴权以及执行NAS(Network Attached Storage，网络附属存储)安全性建立过程，之后所有的NAS消息都由MME指示的NAS安全功能进行保护。
S205，远端控制面设备发送创建会话请求至本地控制面设备。
具体地，MME发送创建会话请求至本地控制面设备，其中，创建会话请求包括EPS承载标识、UE的APN(Access Point Name，接入点名称)、控制面的MME TEID、默认EPS承载QoS(Quality of Service，服务质量)、PDN类型等信息。
S206，本地控制面设备发送创建会话请求至网关设备。
具体地，本地控制面将创建会话请求转发至SGW/PGW。
S207，网关设备发送创建会话响应至本地控制面设备。
具体地，SGW/PGW返回创建会话响应，其中，创建会话响应包括PDN类型、用户面SGW地址和TEID、控制面SGW TEID、EPS承载标识、EPS承载QoS、PGW地址和TEID等信息
S208，本地控制面设备发送创建会话响应至远端控制面设备。
具体地，本地控制面设备将创建会话响应转发至MME。
S209，远端控制面设备通过本地控制面设备发送初始上下文建立请求至基站。
具体地，MME发送S1AP的初始上下文建立请求至eNB，其中S1AP的初始上下文建立请求携带有附着接受消息。另外，S1AP消息包括UE的安全上下文、EPS承载QoS、EPS承载标识，用户面SGW地址和TEID等消息。附着接受消息包括GUTI、PDN类型、PDN地址、APN和TAI列表等信息。
S210，基站与用户设备进行无线资源控制连接配置。
具体地，eNB与UE之间完成RRC(Radio Resource Control，无线资源控制)连接配置过程。
S211，基站通过本地控制面设备发送初始上下文建立响应至远端控制面设备。
具体地，eNB返回初始上下文建立响应消息，其中初始上下文建立响应消息包括S1-U接口上传输下行数据的eNB的地址和TEID，以及UE的附着完 成消息。
S212，远端控制面设备发送修改承载请求至本地控制面设备。
具体地，MME发送修改承载请求至本地控制面设备，其中，修改承载请求包括EPS承载标识、eNB的地址和TEID。
S213，本地控制面设备获取用户设备的上下文信息。
具体地，本地控制面设备从MME获取UE的上下文信息的方式包括以下两种：
方式一：MME发送的修改承载请求中携带有UE的上下文信息，本地控制面设备通过解析修改承载请求，可以获取UE的上下文信息。
方式二，本地控制面设备接收MME直接发送来的UE的上下文信息。
其中，UE的上下文信息包括安全上下文，承载上下文(这里已经包含了SGW的用户面地址以及用户面TEID-U)，TAI列表，GUTI，MME分配的控制面TEID-C和SGW分配的TEID-C，本地控制面设备将这些信息保存。
S214，本地控制面设备发送修改承载请求至网关设备。
具体地，本地控制面设备将修改承载请求转发给SGW/PGW。
S215，网关设备发送修改承载响应至本地控制面设备。
具体地，SGW/PGW返回修改承载响应，其中，修改承载响应中携带有EPS承载标识。
S216，本地控制面设备发送修改承载响应至远端控制面设备。
具体地，本地控制面将修改承载响应消息通知给MME。
S217，本地控制面设备在接收到下行数据到达通知消息之后，向用户设备发起寻呼。
具体地，在UE进入Idle状态，并有下行数据到达通知消息之后，本地控制面设备根据MME分配的TEID-C确定保存的上下文信息，获取TAI列表，向UE所在TAI列表里的所有eNB发起寻呼消息，并携带S-TMSI(GUTI的部分信息)，eNB对UE发起寻呼。
S218，用户设备通过基站发送业务请求至本地控制面设备。
具体地，UE响应寻呼消息，重新进入激活状态，并发送业务请求至本地控制面设备，其中业务请求携带有S-TMSI。
S219，本地控制面设备发送上下文建立请求至基站。
具体地，本地控制面根据S-TMSI找到对应保存的承载上下文(包含EPS承载QoS，承载标识，SGW用户面地址，用户面TEID-U)和安全上下文，向eNB发送初始上下文建立请求消息，根据保存的承载上下文建立eNB到SGW/PGW之间的传输隧道，并将安全上下文发送给eNB以保证UE和eNB之间的安全传输。
S220，基站发送上下文建立完成消息至本地控制面设备。
具体地，eNB完成用户面无线承载建立过程之后，返回初始上下文建立完成消息给本地控制面，其中，初始上下文建立完成消息携带有用于S1接口传输下行数据的eNB的地址和TEID，eNB接受的EPS承载列表，可选的拒绝的EPS承载列表。
进一步地，本地控制面设备发送修改承载请求给SGW/PGW，其中，修改承载请求携带有SGW分配的TEID-C，eNB接受的EPS承载列表(S1接口传输下行数据的eNB的地址和用户面TEID)，可选的eNB拒绝的EPS承载列表。
S221，本地控制面设备发送修改用户状态通知至远端控制面设备。
具体地，由于UE从Idle状态转为Active状态，本地控制面设备将UE最新的状态通知给MME。这是为了避免MME需要向UE传达信令时重复对UE进行寻呼，其次，在上面的流程中，如果有拒绝的EPS承载，MME需要删除核心网中已经拒绝的EPS承载。
图3是本发明第一实施例提供的另一种控制方法的流程示意图，如图所示本实施例中的控制方法的流程可以包括：
S301，用户设备发送跟踪区域更新请求至远端控制面设备。
需要指出的是，当UE跨域移动到达新的跟踪区时，UE发送一条TA(Tracking Area，跟踪区域)更新请求至MME以触发TA更新过程。
S302，远端控制面设备发送创建会话请求至目标本地控制面设备。
具体地，MME保存有UE的上下文信息，向目标本地控制面设备发送创建会话请求，其中，创建会话请求携带有MME地址和控制面TEID，承载上下文(包含源PGW1的地址)。
S303，目标本地控制面设备发送创建会话请求至目标网关设备。
具体地，目标本地控制面将创建会话请求传递至SGW2。
进一步地，SGW2根据PGW1的地址发送修改承载请求，建立SGW2到PGW1的S5连接。
S304，远端控制面设备发送删除会话请求至源本地控制面设备。
具体地，MME向源本地控制面设备发送删除会话请求，其中，删除会话请求携带有MME分配的TEID-C。
S305，源本地控制面设备删除用户设备的上下文信息。
具体地，源本地控制面设备根据MME分配的TEID-C，删除对应的上下文信息。
S306，源本地控制面设备发送删除会话请求至源网关设备。
具体地，源本地控制面设备向SGW1发送删除会话请求。
S307，源网关设备删除用户设备的上下文信息。
具体地，SGW1删除对应的上下文信息。
S308，远端控制面设备通过目标本地控制面设备发送初始上下文建立请求至基站。
具体地，MME通过目标本地控制面设备发送初始上下文(包含用户面SGW地址和TEID-U)建立请求至基站，其中，初始上下文创建请求包括TA更新接受消息(GUTI、TAI列表、EPS承载状态)。
S309，基站与用户设备进行无线资源控制连接配置。
具体地，eNB收到初始上下文建立请求后，进行RRC连接重配置，以建立与UE之间的无线承载。另外，UE删除在收到的EPS承载状态中没有标记为“激活”的承载的本地资源，并返回RRC连接重配置完成消息。
S310，基站发送初始上下文建立响应至远端控制面设备。
具体地，eNB发送初始上下文建立响应至MME，以返回S1接口传输下行数据的eNB的地址和TEID。
S311，远端控制面设备发送修改承载请求至目标本地控制面设备。
具体地，MME发送修改承载请求至目标本地控制面设备，其中，修改承载请求包括EPS承载标识，eNB的地址和TEID。
S312，目标本地控制面设备将修改承载请求转发至源网关设备。
S313，源网关设备发送修改承载响应至目标本地控制面设备。
具体地，SGW1/PGW1发送修改承载响应至目标本地控制面设备，其中，修改承载响应包括EPS承载标识。然后，目标本地控制面设备将修改承载响应通知给MME，以使MME指示UE进行SGW2到PGW1之间的PDN连接释放过程，删除此PDN连接过程中的所有承载上下文。并指示UE发起PDN连接重建立流程，建立本地SGW2与PGW2之间的PDN连接。
S314，用户设备通过基站发送网络连接请求至远端控制面设备。
具体地，UE通过eNB发送PDN连接请求至MME。
S315，远端控制面设备发送创建会话请求至目标本地控制面设备。
具体地，MME发送创建会话请求至目标本地控制面设备，其中，创建会话请求包括目标PGW2的地址、EPS承载标识、用户的APN、控制面的MME TEID-C、默认EPS承载QoS和PDN类型等信息。
S316，目标本地控制面设备发送创建会话请求至目标网关设备。
具体地，目标本地控制面设备将创建会话请求消息传递给SGW2。
S317，目标网关设备发送创建会话响应至目标本地控制面设备。
具体地，SGW2根据PGW2的地址发送修改承载请求，建立SGW2到PGW2的S5连接，此后，返回创建会话响应至目标本地控制面设备。另外，返回的创建会话响应包括PDN类型，用户面S-GW地址和TEID和控制面S-GW TEID，EPS承载标识，EPS承载QoS，P-GW地址和TEID等信息。
S318，远端控制面设备发送承载建立请求至基站。
具体地，MME向UE发送承载建立请求至eNB，其中承载建立请求中携带有PDN连接接受消息(APN，PDN类型，PDN地址，EPS承载标识)，包括EPS承载QoS，用户面S-GW地址和TEID。
S319，基站与用户设备进行无线资源控制连接配置。
具体地，eNB与UE完成RRC连接重配置过程。
S320，基站发送承载建立完成消息至远端控制面设备。
具体地，eNB返回承载建立完成消息至MME，包括S1-U接口上传输下行数据的eNB的地址和TEID。然后，UE向eNB发送直接传输消息，包括PDN连接完成消息。
进一步地，eNB发送承载建立完成消息至MME，其中，承载建立完成消息中携带有PDN连接完成消息。
S321，远端控制面设备发送修改承载请求至本地控制面设备。
具体地，MME发送修改承载请求至本地控制面设备，其中，修改承载请求包括EPS承载标识、eNB的地址和TEID。
S322，目标本地控制面设备获取用户设备的上下文信息。
具体地，目标本地控制面设备获取UE的上下文信息的方式包括以下两种：
方式一：MME发送的修改承载请求中携带有UE的上下文信息，目标本地控制面设备通过解析修改承载请求，可以获取UE的上下文信息。
方式二，目标本地控制面设备接收MME直接发送来的UE的上下文信息。
其中，UE的上下文信息包括安全上下文，承载上下文(这里已经包含了SGW的用户面地址以及用户面TEID-U)，TAI列表，GUTI，MME分配的控制面TEID-C和SGW分配的TEID-C，本地控制面设备将这些信息保存。
进一步地，目标本地控制面设备将修改承载请求转发给SGW2/PGW2，进而SGW2/PGW2返回修改承载响应，包括EPS承载标识。
由上可见，本发明实施例的寻呼和业务请求流程由本地控制面负责，具有S1信令和S11信令代理功能，大大减少了信令传输路径和时间，并且不仅避免了现有技术中MME之间频繁更换引起的信令交互，也避免了由于UE的移动性引起的HSS频繁更新用户位置信息。
图4是本发明第二实施例提供的一种控制方法的流程示意图，该方法应用于无线通信系统，所述无线通信系统包括用户设备、基站、网关设备、本地控制面设备和远端控制面设备。
图11是本发明第二实施例的无线通信系统的架构示意图，如图该架构将在转发分离的移动网络架构的基础上，引入本地控制面设备，将网关设备的控制面功能(GW-C)与转发面功能(GW-U)解耦，并将解耦出的控制面功能与传统网络架构的MME、PCRF(Policy and Charging Rules Function，策略与计费规则功能实体)等合并成远端控制面设备，或称其为集中控制面设备(Central Control，CC)，将SGW的转发面功能(SGW-U)和PGW的转发面 (PGW-U)功能合并成网关设备(GW-U)，Mobile flow接口是网关数据转发分离后的参考点。
如图4所示本实施例中的控制方法的流程可以包括：
S401，用户设备发送附着请求至基站。
具体地，UE发送附着请求至eNB。
S402，基站发送附着请求至本地控制面设备。
具体地，eNB发送附着请求至本地控制面设备。
S403，本地控制面设备发送附着请求至远端控制面设备。
具体地，本地控制面设备将附着请求转发至远端控制面设备，以使远端控制面设备与UE之间完成认证和鉴权过程。
S404，远端控制面设备发送上行数据转发规则至本地控制面设备。
具体地，远端控制面设备分配上行隧道标识，并下发上行数据转发规则，其中，上行数据转发规则包括索引信息。
S405，本地控制面设备发送上行数据转发规则至网关设备。
具体地，本地控制面设备发送上行数据转发规则至GW-U，以使GW-U按照该上行转发规则进行转发。
S406，远端控制面设备通过本地控制面设备发送初始上下文建立请求至基站。
具体地，远端控制面设备发送初始上下文建立请求至eNB，其中，初始上下文建立请求包括分配的上行隧道标识。
S407，基站与用户设备进行无线资源控制连接配置。
具体地，eNB和UE之间完成RRC连接配置。
S408，基站通过本地控制面设备发送初始上下文建立响应至远端控制面设备。
具体地，eNB向控制面返回初始上下文建立响应，其中，初始上下文建立响应包括eNB分配的下行隧道ID，以及附着完成消息。
S409，远端控制面设备发送下行数据转发规则至本地控制面设备。
其中，下行数据转发规则包括索引信息，以指示GW-U向UE发送IP报文的方式。
S410，本地控制面设备获取用户设备的上下文信息。
具体地，本地控制面设备获取UE的上下文信息的方式包括以下两种：
方式一：远端控制面设备发送的修改下行数据转发规则中携带有UE的上下文信息，本地控制面设备通过解析修改下行数据转发规则，可以获取UE的上下文信息。
方式二，本地控制面设备接收远端控制面设备直接发送来的UE的上下文信息。
其中，UE的上下文信息包括UE安全上下文、承载上下文、TAI列表，GUTI和上下行转发规则索引信息，本地控制面设备将这些信息保存。
S411，本地控制面设备发送修改下行数据转发规则至网关设备。
具体地，本地控制面设备将下行数据转发规则通知GW-U。
S412，本地控制面设备在接收到下行数据到达通知消息之后，向用户设备发起寻呼。
具体地，在用户设备进入空闲状态时，GW-U匹配下行转发规则和缓存下行数据，并向本地控制面设备发送下行数据到达通知，其中，下行数据到达通知包括对应下行转发规则的索引信息。本地控制面根据下行转发规则的索引信息，确定对应的UE的TAI列表，向UE所在TAI列表里的所有eNB发起寻呼消息，该消息携带有S-TMSI(GUTI的部分信息)，以使eNB对UE发起寻呼。
S413，用户设备通过基站发送业务请求至本地控制面设备。
具体地，UE响应寻呼消息，重新进入Active状态，并发送业务请求至本地控制面设备，其中业务请求携带有S-TMSI(GUTI的部分信息)。
S414，本地控制面设备发送上下文建立请求至基站。
具体地，本地控制面根据S-TMSI找到对应保存的承载上下文(包含EPS承载QoS，EPS承载标识，上行隧道标识)和安全上下文，并向eNB发送初始上下文建立请求，以使eNB根据保存的承载上下文建立eNB到GW-U之间的传输隧道，并将安全上下文发送给eNB以保证UE和eNB之间的安全传输。
S415，基站发送上下文建立完成消息至本地控制面设备。
具体地，eNB完成用户面无线承载建立过程之后，返回初始上下文建立完 成消息，其中，初始上下文建立完成消息包括传输下行数据的eNB隧道标识。
S416，本地控制面设备发送修改下行数据转发规则至远端控制面设备。
具体地，本地控制面设备在获取到eNB的隧道标识后，根据缓存的下行转发规则索引，更新UE的下行转发规则，建立eNB与GW-U之间的传输隧道，以使GW-U向eNB发送缓存报文。
S417，本地控制面设备发送修改用户状态通知至远端控制面设备。
具体地，由于UE从Idle状态转为Active状态，本地控制面设备将UE最新的状态通知给远端控制面设备。
图5是本发明第二实施例提供的另一种控制方法的流程示意图，如图所示本实施例中的控制方法的流程可以包括：
S501，用户设备发送跟踪区域更新请求至远端控制面设备。
需要指出的是，当UE跨域移动到达新的跟踪区范围时，UE发送一条TA更新请求至远端控制面设备以触发TA更新过程。
S502，远端控制面设备发送上行数据转发规则至目标本地控制面设备。
具体地，远端控制面设备分配上行隧道标识，并下发上行数据转发规则至目标本地控制面设备，其中，该上行数据转发规则包括索引信息。
S503，目标本地控制面设备发送上行数据转发规则至目标网关设备。
具体地，目标本地控制面通知GW-U2接受该隧道的报文并按照上行转发规则进行转发。
S504，远端控制面设备发送上下文释放命令至源本地控制面设备。
S505，源本地控制面设备删除用户设备的上下文信息。
具体地，源本地控制面设备根据上下文释放命令删除对应的UE的上下文信息。
S506，源本地控制面设备发送上下文释放命令至源网关设备。
具体地，源本地控制面设备发送上下文释放命令至GW-U1。
S507，源网关设备删除用户设备的上下文信息。
具体地，GW-U1根据上下文释放命令删除对应的UE的上下文信息。
S508，远端控制面设备通过目标本地控制面设备发送初始上下文建立请求至基站。
具体地，远端控制面设备发送初始上下文建立请求至基站，其中，初始上下文建立请求包括分配的上行隧道标识，并携带有TAU接受消息，TAU接受消息包括GUTI、PDN类型、PDN地址、APN、TAI列表等信息。
S509，基站与用户设备进行无线资源控制连接配置。
S510，基站发送初始上下文建立响应至远端控制面设备。
具体地，eNB返回初始上下文建立响应至远端控制面设备，其中，初始上下文建立响应包括eNB分配的下行隧道ID。
S511，远端控制面设备发送修改下行数据转发规则至目标本地控制面设备。
具体地，远端控制面设备发送修改下行数据转发规则至目标本地控制面设备，其中，修改下行数据转发规则包括索引信息，指示GW-U发送给UE的IP报文的方式。
S512，目标本地控制面设备将修改下行数据转发规则转发至目标网关设备。
具体地，目标本地控制面设备将修改下行转发规则通知给GW-U2。
S513，用户设备通过基站发送网络连接请求至远端控制面设备。
具体地，远端控制面设备指示UE进行PDN连接释放过程，删除源PDN连接过程中的所有承载，并指示UE发起PDN连接重建立流程。在此过程中，UE通过eNB发送网络连接请求至远端控制面设备。
S514，远端控制面设备发送下行数据转发规则至目标本地控制面设备。
具体地，远端控制面设备分配上行隧道标识，并下发下行数据转发规则，其中，下行数据转发规则包括索引信息，指示GW-U发送给UE的IP报文的方式。
S515，目标本地控制面设备发送下行数据转发规则至目标网关设备。
具体地，目标本地控制面设备通知GW-U2接受该隧道的报文并按照下行转发规则进行转发。
S516，远端控制面设备发送承载建立请求至基站。
具体地，远端控制面设备向eNB发送承载建立请求，其中，承载建立请求携带有PDN连接接受消息(APN，PDN类型，PDN地址，EPS承载标识)， 该PDN连接接受消息包括分配的上行隧道标识。
S517，基站与用户设备进行无线资源控制连接配置。
S518，基站发送承载建立完成消息至远端控制面设备。
需要指出的是，在此之前，eNB返回承载建立响应至远端控制面设备，其中承载建立响应包括S1-U接口上传输下行数据的eNB的地址和TEID。然后，UE向eNB发送直接传输消息，其中，直接传输消息包括PDN连接完成消息。
具体地，eNB将PDN连接完成消息传递给远端控制面设备。
S519，远端控制面设备发送修改下行数据转发规则至本地控制面设备。
其中，修改下行数据转发规则包括索引信息，以指示GW-U向UE发送IP报文的方式。
S520，目标本地控制面获取用户设备的上下文信息。
具体地，目标本地控制面设备获取UE的上下文信息的方式包括以下两种：
方式一：远端控制面设备发送的修改下行数据转发规则中携带有UE的上下文信息，目标本地控制面设备通过解析修改下行数据转发规则，可以获取UE的上下文信息。
方式二，目标本地控制面设备接收MME直接发送来的UE的上下文信息。
其中，UE的上下文信息包括UE安全上下文、承载上下文、TAI列表，GUTI和上下行转发规则索引信息，本地控制面设备将这些信息保存。
S521，目标本地控制面设备发送修改下行数据转发规则至目标网关设备。
由上可见，本发明实施例通过本地控制面设备的信令代理功能，不必经过远端控制面设备中转，可以直接在本地实现用户的寻呼和业务请求过程，大大缩短了信令传输路径和时间。
图6是本发明实施例中一种本地控制面设备的结构示意图，该本地控制面设备用以实现图1至图5所描述的控制方法。如图所示本发明实施例中的本地控制面设备至少可以包括信息获取模块510和承载建立模块520，其中：
信息获取模块510，用于根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息。
其中，用户设备的上下文信息至少包括安全上下文、承载上下文(包含了 SGW的用户面地址和用户面TEID-U)、TAI(Tracking Area Identity，跟踪区标识)列表、GUTI(Globally Unique Temporary Identity，全球唯一临时标识)、MME分配的控制面TEID-C和SGW分配的TEID-C。其中，TEID(Tunnel Endpoint ID)为隧道端点标识符。
可选地，上述用户设备和远端控制面设备的交互过程包括用户设备发起的附着请求过程和分组数据网络(Package Data Network，PDN)连接建立过程。
一方面，信息获取模块510可以如图7所示进一步包括信息转发单元511和信息获取单元512，其中：
信息转发单元511，用于在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备，所述转发面修改信息携带有所述用户设备的上下文信息。
信息获取单元512，用于通过解析所述转发面修改信息，获取所述用户设备的上下文信息。
另一方面，信息获取模块510可以如图8所示进一步包括信息转发单元513和信息接收单元514，其中：
信息转发单元513，用于在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备。
信息接收单元514，用于接收所述远端控制面设备发送的所述用户设备的上下文信息。
承载建立模块520，用于所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载。
具体地，承载建立模块520在接收到用户设备通过其当前驻留小区所在的基站发送来的业务请求之后，根据用户设备的上下文信息向该基站发送上下文建立请求，以使该基站建立与用户设备之间的无线承载。
请参阅图6，如图所示本发明实施例中的本地控制面设备还可以包括寻呼发起模块530，用于在接收到下行数据到达通知消息，根据所述用户设备的上下文信息向所述用户设备发起寻呼，以使所述用户设备从空闲状态转换为激活状态，并通过当前驻留小区所在的基站发送业务请求。
请参阅图6，如图所示本发明实施例中的本地控制面设备还可以包括信息删除模块540，用于在接收到所述远端控制面设备发送的删除上下文请求之后，删除保存的所述用户设备的上下文信息；发送删除上下文请求至所述网关设备，以使所述网关设备删除保存的所述用户设备的上下文信息。需要指出的是，这里的源网关包括源SGW，而不包括源PGW。
请参阅图6，如图所示本发明实施例中的本地控制面设备还可以包括通知发送模块550，用于向所述远端控制面设备发送修改用户状态通知，以使所述远端控制面设备修改所述用户设备的状态信息。
图7是本发明实施例中的另一种本地控制面设备的结构示意图，如图7所示，该本地控制面设备可以包括：至少一个处理器601，例如CPU，至少一个网络接口603，存储器604，至少一个通信总线602。其中，通信总线602用于实现这些组件之间的连接通信。其中，网络接口603可以为无线接口，例如天线装置，用于与其他节点设备进行信令或数据的通信。存储器604可以是高速RAM存储器，也可以是非易失的存储器(non-volatile memory)，例如至少一个磁盘存储器。可选的，存储器604还可以是至少一个位于远离前述处理器601的存储装置。存储器604中存储一组程序代码，且处理器601用于调用存储器604中存储的程序代码，执行以下操作：
根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息；
根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载。
可选地，所述用户设备和所述远端控制面设备的交互过程包括：
所述用户设备发起的附着请求过程和分组数据网络连接建立过程。
另可选地，处理器601根据所述用户设备和远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息的具体操作为：
在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备，所述转发面修改信息携带有所述用户设备的上下文信息；
通过解析所述转发面修改信息，获取所述用户设备的上下文信息。
又可选地，处理器601根据所述用户设备和远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息的具体操作为：
在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备；
接收所述远端控制面设备发送的所述用户设备的上下文信息。
还可选地，处理器601根据所述用户设备的上下文信息，建立所述用户设备与所述用户设备当前驻留小区所在的基站之间的无线承载的具体操作为：
在接收到所述用户设备通过所述用户设备当前驻留小区所在的基站发送来的业务请求之后，根据所述用户设备的上下文信息向所述用户设备当前驻留小区所在的基站发送上下文建立请求，以使所述用户设备当前驻留小区所在的基站建立与所述用户设备之间的无线承载。
相应地，处理器601在接收到所述用户设备通过所述用户设备当前驻留小区所在的基站发送来的业务请求之前，还执行：
在接收到下行数据到达通知消息，根据所述用户设备的上下文信息向所述用户设备发起寻呼，以使所述用户设备从空闲状态转换为激活状态，并通过当前驻留小区所在的基站发送业务请求。
进一步地，处理器601根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息之后，还执行：
在接收到所述远端控制面设备发送的删除上下文请求之后，删除保存的所述用户设备的上下文信息；
发送删除上下文请求至所述网关设备，以使所述网关设备删除保存的所述用户设备的上下文信息。
还可选地，处理器601根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载之后，还执行：
向所述远端控制面设备发送修改用户状态通知，以使所述远端控制面设备修改所述用户设备的状态信息。
还可选地，所述远端控制面设备包括：
传统EPC网络架构的移动性管理实体；或者
控制转发解耦网络架构的集中控制面设备。
还可选地，所述用户设备的上下文信息包括：
用户设备的安全上下文和用户设备的承载上下文，所述用户设备的承载上下文包括转发面网关的用户面地址、隧道标识、跟踪区列表、全球唯一临时标识以及远端控制面分配的控制面标识。
本发明实施例还提出了一种计算机存储介质，所述计算机存储介质存储有程序，所述程序包括若干指令用以执行本发明实施例图1～图5所描述的一种控制方法中的部分或全部的步骤。
本发明实施例中，本地控制面设备根据用户设备和远端控制面设备的交互过程，从远端控制面设备获取用户设备的上下文信息，进而根据所述用户设备的上下文信息，建立用户设备当前驻留小区所在的基站与用户设备之间的无线承载，可以实现减少用户设备从空闲状态变为激活状态时的信令传输时延，并可以避免用户设备移动导致信令交互过多的问题。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。

Claims (20)

  1. 一种控制方法，其特征在于，所述方法应用于无线通信系统，所述无线通信系统包括用户设备、基站、网关设备、本地控制面设备和远端控制面设备，所述方法包括：
    所述本地控制面设备根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息；
    所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载。
  2. 如权利要求1所述的方法，其特征在于，所述用户设备和所述远端控制面设备的交互过程包括：
    所述用户设备发起的附着请求过程和分组数据网络连接建立过程。
  3. 如权利要求1所述的方法，其特征在于，所述本地控制面设备根据所述用户设备和远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息包括：
    在所述用户设备和所述远端控制面设备的交互过程中，所述本地控制面设备将所述远端控制面设备发送的转发面修改信息转发至所述网关设备，所述转发面修改信息携带有所述用户设备的上下文信息；
    所述本地控制面设备通过解析所述转发面修改信息，获取所述用户设备的上下文信息。
  4. 如权利要求1所述的方法，其特征在于，所述本地控制面设备根据所述用户设备和远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息包括：
    在所述用户设备和所述远端控制面设备的交互过程中，所述本地控制面设备将所述远端控制面设备发送的转发面修改信息转发至所述网关设备；
    所述本地控制面设备接收所述远端控制面设备发送的所述用户设备的上下文信息。
  5. 如权利要求1所述的方法，其特征在于，所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备与所述用户设备当前驻留小区所在的基站之间的无线承载包括：
    所述本地控制面设备在接收到所述用户设备通过所述用户设备当前驻留小区所在的基站发送来的业务请求之后，根据所述用户设备的上下文信息向所述用户设备当前驻留小区所在的基站发送上下文建立请求，以使所述用户设备当前驻留小区所在的基站建立与所述用户设备之间的无线承载。
  6. 如权利要求5所述的方法，其特征在于，所述本地控制面设备在接收到所述用户设备通过所述用户设备当前驻留小区所在的基站发送来的业务请求之前，还包括：
    所述本地控制面设备在接收到下行数据到达通知消息之后，根据所述用户设备的上下文信息向所述用户设备发起寻呼，以使所述用户设备从空闲状态转换为激活状态，并通过当前驻留小区所在的基站发送业务请求。
  7. 如权利要求1所述的方法，其特征在于，所述本地控制面设备根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息之后，还包括：
    所述本地控制面在接收到所述远端控制面设备发送的删除上下文请求之后，删除保存的所述用户设备的上下文信息；
    所述本地控制面设备发送删除上下文请求至所述网关设备，以使所述网关设备删除保存的所述用户设备的上下文信息。
  8. 如权利要求1所述的方法，其特征在于，所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载之后，还包括：
    所述本地控制面设备向所述远端控制面设备发送修改用户状态通知，以使所述远端控制面设备修改所述用户设备的状态信息。
  9. 如权利要求1-8任一项所述的方法，其特征在于，所述远端控制面设备包括：
    传统EPC网络架构的移动性管理实体；或者
    控制转发解耦网络架构的集中控制面设备。
  10. 如权利要求1所述的方法，其特征在于，所述用户设备的上下文信息包括：
    用户设备的安全上下文和用户设备的承载上下文，所述用户设备的承载上下文包括转发面网关的用户面地址、隧道标识、跟踪区列表、全球唯一临时标识以及远端控制面分配的控制面标识。
  11. 一种本地控制面设备，其特征在于，所述本地控制面设备应用于无线通信系统，所述无线通信系统还包括用户设备、基站、网关设备和远端控制面设备，所述本地控制面设备包括：
    信息获取模块，用于根据所述用户设备和所述远端控制面设备的交互过程，从所述远端控制面设备获取所述用户设备的上下文信息；
    承载建立模块，用于所述本地控制面设备根据所述用户设备的上下文信息，建立所述用户设备当前驻留小区所在的基站与所述用户设备之间的无线承载。
  12. 如权利要求11所述的本地控制面设备，其特征在于，所述用户设备和所述远端控制面设备的交互过程包括：
    所述用户设备发起的附着请求过程和分组数据网络连接建立过程。
  13. 如权利要求11所述的本地控制面设备，其特征在于，所述信息获取模块包括：
    信息转发单元，用于在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备，所述转发面修改信息携带有所述用户设备的上下文信息；
    信息解析单元，用于通过解析所述转发面修改信息，获取所述用户设备的 上下文信息。
  14. 如权利要求11所述的本地控制面设备，其特征在于，所述信息获取模块包括：
    信息转发单元，用于在所述用户设备和所述远端控制面设备的交互过程中，将所述远端控制面设备发送的转发面修改信息转发至所述网关设备；
    信息接收单元，用于接收所述远端控制面设备发送的所述用户设备的上下文信息。
  15. 如权利要求11所述的本地控制面设备，其特征在于，所述承载建立模块，具体用于在接收到所述用户设备通过所述用户设备当前驻留小区所在的基站发送来的业务请求之后，根据所述用户设备的上下文信息向所述用户设备当前驻留小区所在的基站发送上下文建立请求，以使所述用户设备当前驻留小区所在的基站建立与所述用户设备之间的无线承载。
  16. 如权利要求15所述的本地控制面设备，其特征在于，所述本地控制面设备，还包括：
    寻呼发起模块，用于在接收到下行数据到达通知消息，根据所述用户设备的上下文信息向所述用户设备发起寻呼，以使所述用户设备从空闲状态转换为激活状态，并通过当前驻留小区所在的基站发送业务请求。
  17. 如权利要求11所述的本地控制面设备，其特征在于，所述本地控制面设备，还包括：
    信息删除模块，用于在接收到所述远端控制面设备发送的删除上下文请求之后，删除保存的所述用户设备的上下文信息；发送删除上下文请求至所述网关设备，以使所述网关设备删除保存的所述用户设备的上下文信息。
  18. 如权利要求12所述的本地控制面设备，其特征在于，所述本地控制面设备，还包括：
    通知发送模块，用于向所述远端控制面设备发送修改用户状态通知，以使 所述远端控制面设备修改所述用户设备的状态信息。
  19. 如权利要求11-18任一项所述的本地控制面设备，其特征在于，所述远端控制面设备包括：
    传统EPC网络架构的移动性管理实体；或者
    控制转发解耦网络架构的集中控制面设备。
  20. 如权利要求11所述的本地控制面设备，其特征在于，所述用户设备的上下文信息包括：
    用户设备的安全上下文和用户设备的承载上下文，所述用户设备的承载上下文包括转发面网关的用户面地址、隧道标识、跟踪区列表、全球唯一临时标识以及远端控制面分配的控制面标识。
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