WO2018176394A1 - 网络拥塞控制方法、设备及系统 - Google Patents

网络拥塞控制方法、设备及系统 Download PDF

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Publication number
WO2018176394A1
WO2018176394A1 PCT/CN2017/079031 CN2017079031W WO2018176394A1 WO 2018176394 A1 WO2018176394 A1 WO 2018176394A1 CN 2017079031 W CN2017079031 W CN 2017079031W WO 2018176394 A1 WO2018176394 A1 WO 2018176394A1
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Prior art keywords
ran
congestion
congestion information
mme
network device
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PCT/CN2017/079031
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English (en)
French (fr)
Inventor
金恒
靳维生
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17904280.9A priority Critical patent/EP3579609B1/en
Priority to CN201780061274.3A priority patent/CN109792631B/zh
Priority to PCT/CN2017/079031 priority patent/WO2018176394A1/zh
Publication of WO2018176394A1 publication Critical patent/WO2018176394A1/zh
Priority to US16/585,848 priority patent/US11075841B2/en

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/11—Identifying congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/20—Traffic policing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2475—Traffic characterised by specific attributes, e.g. priority or QoS for supporting traffic characterised by the type of applications
    • 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
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]

Definitions

  • the embodiments of the present application relate to communications technologies, and in particular, to a network congestion control method, device, and system.
  • OTT Over the Top
  • the RAN Congestion Awareness Function acquires congestion information on the Radio Access Network (RAN) side.
  • the Mobility Management Entity acquires an evolved NodeB (eNB) in which congestion occurs, and a user identity under the cell, such as an International Mobile Subscriber Identity (IMSI) or an access point ( Access Point Name (APN); then send the User Interface Information Congestion Information (RUCI) of each User Equipment (User Equipmnt, UE) to the Policy and Charging Rules Function (Policy and Charging Rules Function).
  • IMSI International Mobile Subscriber Identity
  • API Access Point Name
  • RUCI User Interface Information Congestion Information
  • Policy and Charging Rules Function Policy and Charging Rules Function
  • PCRF Physical Resource Control Function
  • EPC Evolved Packet Core
  • the radio resource allocation policy is adjusted according to the service type, and the congestion control is implemented by the optimal configuration of the radio resources.
  • the effect of adjusting the wireless resource allocation policy according to the service type to implement congestion control is not significant.
  • the embodiment of the present invention provides a network congestion control method, device, and system, and dynamically controls user residence or handover according to a user type, a service type, and a user location, thereby achieving congestion control.
  • a first aspect of the embodiments of the present application provides a network congestion control method, including:
  • the network device acquires congestion information of the RAN
  • RFSP RAT/Frequency Selection Priority
  • the network device sends a Select Priority Identification (SPID) corresponding to the RFSP to the RAN, where the SPID is used by the RAN to perform access control on the UE according to the SPID.
  • SPID Select Priority Identification
  • the network congestion control method provided by the network device performs dynamic packet RFSP configuration of the user according to the information such as the RAN User Plane Congestion Information (RUCI), and does not need to modify the subscription information of the UE, according to the user type and
  • RUCI RAN User Plane Congestion Information
  • the service type selects different networks/bands/cells for camping or handover control, and by identifying the location of the cell, the user is guided to perform frequency selection, thereby achieving congestion control and the like.
  • the network congestion control method provided by the embodiment of the present application can control the UE with the lower priority service to access another frequency band/cell instead of reducing
  • the QoS of the service of the UE of the lower priority service makes the effect of congestion control more significant.
  • the network device is a Mobility Management Entity (MME), and the network device acquires congestion information of the RAN, where the MME receives the RAN congestion information sent by the RCAF.
  • the congestion information of the RAN includes a first access network user plane congestion information RUCI report and a network congestion level list, and the first RUCI report is an RUCI of all RANs managed by the MME.
  • the network device configures the RFSP of the UE according to the congestion information of the RAN, and the MME adjusts the RFSP of the UE according to the first RUCI report and the network congestion level list.
  • the method before the MME receives the congestion information of the RAN sent by the RCAF, the method further includes: the MME sending a message of the congestion information subscription request to the RCAF, where the message of the congestion information subscription request includes the An identifier of all RANs managed by the MME; the MME receives a message sent by the RCAF for responding to the subscription request.
  • the network congestion control method provided by each of the above-mentioned possible designs, the MME, through the eNB, reports the congestion of all the eNBs/cells managed by the MME, and then adjusts the RFSP of the UE according to the acquired RUCI dynamics, and then delivers the corresponding SPID.
  • the MME through the eNB, reports the congestion of all the eNBs/cells managed by the MME, and then adjusts the RFSP of the UE according to the acquired RUCI dynamics, and then delivers the corresponding SPID.
  • the user's access priority is adjusted, and the user's residency is controlled to achieve the purpose of network congestion adjustment.
  • the network device is an MME, and the network device acquires congestion information of the RAN, where the MME receives the RAN congestion information sent by the Service Capability Exposure Function (SCEF).
  • the congestion information of the RAN includes a second RUCI report, an identifier of the UE, and an identifier of all RANs specified by the SCEF, and the second RUCI reports an RUCI of all RANs specified by the SCEF.
  • the network device configures the RFSP of the UE according to the congestion information of the RAN, and the MME selects the congestion information of the RAN where the UE is located from the second RUCI report according to the identifier of the UE.
  • the MME configures the RFSP of the UE according to the location of the UE, the congestion information of the RAN where the UE is located, and the subscription information of the UE.
  • the method before the MME receives the congestion information of the RAN sent by the SCEF, the method further includes: the SCEF receiving a service request sent by an application, where the service request includes location information of the UE; Determining, according to the location information of the UE, a RAN list in which the UE is located, where the RAN in the RAN list is all RANs specified by the SCEF; and the SCEF sends a message of a congestion information subscription request to the RCAF, the congestion
  • the information subscription request message includes an identifier of all RANs specified by the SCEF; and the SCEF receives the second RUCI report sent by the RCAF.
  • the network congestion control method provided by each of the above-mentioned possible designs is configured to perform SPID configuration for a specific user according to the service request of the application, and the SCEF requests the RC to request the congestion information of the RAN in the location range of the user, and then reports the information to the MME, and the MME dynamically updates according to the congestion information.
  • the RFSP is adjusted and sent to the RAN to adjust the user's access priority and control the user's residency or handover, so as to achieve the purpose of specific user network optimization according to the requirements of the application.
  • the network device is a PCRF
  • the network device acquires congestion information of the RAN, including: the PCRF receives congestion information of the RAN sent by the RCAF, and the congestion information of the RAN includes a third RUCI report. And the identity of the UE, the third RUCI is reported as the RUCI of the RAN where congestion occurs.
  • the network device configures the RFSP of the UE according to the congestion information of the RAN, and the PCRF adjusts the RFSP of the UE according to the third RUCI report and the subscription information of the UE.
  • the network device sends an SPID corresponding to the RFSP to the RAN, where the PCRF sends a SPID sending message to the MME through the serving gateway S_GW, where the SPID sends a message for the The MME sends the SPID to the RAN according to the SPID sending message.
  • the method before the PCRF receives the congestion information of the RAN sent by the RCAF, the method further includes: the RCAF receiving, by the RAN, a congestion information report sent by the RAN, where the congestion information report includes an identifier of the RAN where the congestion occurs; The RCAF sends a UE identity request message to the MME according to the identifier of the RAN that is congested; the RCAF receives a UE identity request response message sent by the MME, where the UE identity request response message includes the RAN under the congestion The identity of the UE.
  • the PCRF acquires the congestion information on the RAN side through the RCAF, and then dynamically adjusts the RFSP of the user through the policy, and sends the corresponding SPID to the RAN side, thereby adjusting the access priority of the user. Level, control the user's resident live switch, so as to control the network congestion.
  • the embodiment of the present application provides a network device, where the network device has a function of implementing the foregoing network congestion control method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the network device includes multiple function modules or units, and is used to implement any one of the network congestion control methods in the foregoing first aspect.
  • the processor and the transceiver may be included in the structure of the network device.
  • the processor is configured to support the apparatus to perform a corresponding function in any of the network congestion control methods of the above first aspect.
  • the transceiver is configured to support communication between the device and other network devices, and may be, for example, a corresponding radio frequency module or a baseband module.
  • the apparatus can also include a memory for coupling with the processor that retains program instructions and data necessary for the network device to perform the network congestion control method described above.
  • the network device may be an MME, and may also be a PCRF.
  • the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the network device, which includes a program designed to execute the first aspect.
  • an embodiment of the present application provides a computer program product, comprising: instructions that, when executed by a computer, cause the computer to perform the functions performed by the network device in the above method.
  • the embodiment of the present application provides a service capability open function network element, where the network element has a function of implementing the steps performed by the SCEF in the network congestion control method.
  • the embodiment of the present application provides a radio access network congestion sensing function network element, where the network element has a function of implementing the steps performed by the RCAF in the network congestion control method.
  • a communication system including a UE, a RAN, and the network device provided by the foregoing second or third aspect.
  • system further comprises the network element provided by the fifth aspect and the sixth aspect.
  • the network device performs dynamic packet RFSP configuration of the user according to the information such as the RUCI, and does not need to modify the subscription information of the UE, according to the user type and the industry.
  • the service type selects different networks/bands/cells for camping or handover control, and by identifying the location of the cell, the user is guided to perform frequency selection, thereby achieving congestion control and the like.
  • the network congestion control method provided by the embodiment of the present application can control the UE with the lower priority service to access another frequency band/cell.
  • the QoS of the service of the UE with lower priority services is not reduced, so that the effect of congestion control is more significant.
  • FIG. 1 is a schematic structural diagram of a mobile network according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a network congestion control method according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a network congestion control method according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a network congestion control method according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a network congestion control method according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • the technical solution provided by the embodiment of the present application is applicable to a mobile communication network.
  • the mobile communication network in the embodiment of the present application refers to a combination of different network element types, a transmission network, and a network management subsystem. Different network element types bear different network functions, such as Base Transceiver Station (BTS), controller, Core Network (CN), and so on.
  • BTS Base Transceiver Station
  • CN Core Network
  • the transport network is used to connect network elements
  • the network management subsystem is used to manage network elements and transport networks.
  • the UE in the embodiment of the present application mainly refers to a portable mobile terminal, such as a smart phone, a tablet computer, a PAD, and the like.
  • the mobile network communicates with the mobile terminal through a wireless interface, and the wireless interface can adopt various wireless technologies.
  • the wireless technology that can be used in the wireless interface includes the 4th Generation mobile communication technology (4G), and may also be the 5th Generation mobile communication technology (5G) currently under study. And even other research on other mobile communication technologies.
  • Network congestion control is the common demand of most operators at present, and is concerned by 3GPP organizations and domestic industry standards organizations.
  • two types of congestion scenarios are defined for network congestion and insufficient resources of the backhaul link, and user-level service control, application-level data control, and differentiated charging are defined.
  • Congestion management scenarios The technical solution for network congestion control mainly involves the perception of user plane congestion and the mitigation method of user plane congestion.
  • Congestion management method based on core network that is, the core network participates in the congestion management process in real time, and the RAN transmits congestion information to the PCRF through some method.
  • the PCRF performs targeted policy delivery based on the received congestion information.
  • the RAN-based congestion management method the congestion information does not need to be reported to the core network.
  • the wireless network performs corresponding rules based on predefined rules. deal with.
  • the premise of the congestion management method based on the core network is the reporting of congestion information, that is, the wireless network transmits the information of congestion occurrence to the PCRF through a corresponding method.
  • One of the alternatives is: Off-path congestion information reporting method. Ie The plug information is not transmitted through the EPC master device. A new RCAF entity is added to the network.
  • the wireless network management system can monitor the natural characteristics of the wireless network congestion, obtain network congestion information from the network management system, organize and replenish the user information, and congest the community. The affected user information is sent to the PCRF. Most of the work of this kind of solution is done on functional entities other than the main device, which has little impact on the main device and has better deployment flexibility.
  • Figure 1 is a schematic diagram of a UPCON architecture.
  • the EPC architecture after the introduction of the Off-path congestion information reporting scheme is shown in Figure 1.
  • the logical functional units in the system architecture mainly include:
  • RAN includes an eNB or a cell, which provides radio resources for terminal access, and can provide higher uplink and downlink rates, lower transmission delay, and more reliable wireless transmission.
  • SCEF Service Capability Exposure Function
  • MME Control plane management for the core network. Its main functions include mobility management, session management, access control, network element selection, and storage user context.
  • HSS Home Subscriber Server
  • RCAF collects RAN user plane congestion information through the RAN's Operation Administration and Maintenance (OAM) information, sends the RUCI to the PCRF through the Np interface, and obtains the eNB or the cell in the congested state from the MME through the Nq interface.
  • OAM Operation Administration and Maintenance
  • S-GW Serving GateWay
  • SAE System Architecture Evolution
  • P-GW Packet Data Network GateWay
  • PDN Packet Data Network
  • Mobility anchor The gateway responsible for the UE accessing the Packet Data Network (PDN), assigning the user IP address, and being the 3GPP and non-3GPP access systems. Mobility anchor.
  • PCRF This functional entity contains policy control decisions and functions based on flow charging control.
  • TDF Traffic Detection Function
  • RCAF is added, which interacts with the OAM to learn the congestion information of the eNB or the cell, and queries the MME to query the currently affected users and APN information in the congested cell through the Nq/Nq' interface, and the RCAF performs Doppler radar (Doppler).
  • Doppler Doppler radar
  • the PCRF supports network state-based policy management. It needs to support the Np interface to collect congestion information from the RCAF, and determine the control policy based on user plane congestion information, user subscription, application type, and content type.
  • the MME/SGSN needs to support the Nq/Nq' interface, report or respond to the RCAF request to respond to user information in the congested cell.
  • OAM needs to be enhanced to provide RCAF with relevant congestion information including cell load.
  • the RCAF wireless network state-aware function entity performs close and dynamic monitoring of the area. Once the network management is informed that the network is in an abnormal state of physical resource allocation exhaustion and dropped call rate, the status of the PCRF is reported. The PCRF obtains a list of abnormally congested cells through the Np interface, and a list of active users in the cells. The PCRF sends a network state-based congestion management policy according to the operator's policy. For example, differentiated congestion management based on user level can be implemented.
  • QoS quality of service
  • the radio resource allocation policy is adjusted according to the service type, and the congestion control scheme is implemented by the optimal configuration of the radio resources.
  • the congestion control scheme is implemented by the optimal configuration of the radio resources.
  • the embodiment of the present application provides a network congestion control method.
  • the application scenario of the present application will be schematically illustrated by using the 3GPP system shown in FIG. 1 as an example.
  • the technical solutions of the present application are described in detail below with reference to specific embodiments.
  • the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.
  • FIG. 2 is a schematic flowchart of a network congestion control method according to an embodiment of the present disclosure. As shown in FIG. 2, the network congestion control method provided in this embodiment includes:
  • the network device acquires congestion information of the RAN.
  • the congestion information on the RAN side may include one or more of the information of the RUCI report, the network congestion level list, the identifier of the RAN, and the identifier of the UE.
  • the network device configures the RFSP of the UE according to the congestion information of the RAN.
  • the network device sends, to the RAN, an SPID corresponding to the RFSP.
  • the SPID is called RFSP on the core network side.
  • This cell can be specified by the user subscription information (stored in the HSS), or can be specified by the MME or PCRF. After the cell is delivered to the RAN side, it can be used. Flexible control of the terminal's behavioral policies (such as specifying the priority of the terminal's presence and switching frequency to reduce network useless signaling).
  • the RAN performs access control on the UE according to the SPID.
  • the network device may be a network element (MME) responsible for mobility management, or may also be a Policy and Charging Rules Function Network Element (PCRF).
  • MME network element
  • PCRF Policy and Charging Rules Function Network Element
  • the network device may receive the congestion information of the RAN side that is reported by the RCAF to the network device periodically or by the event.
  • the RCAF may report the congestion information of the RAN side to the MME, and the RCAF may also report the congestion of the RAN side to the PCRF.
  • the information reports congestion information on the RAN side.
  • the network device may also receive the congestion information of the RAN side reported by other network elements.
  • the MME may receive the congestion information of the RAN side reported by the SCEF.
  • the network congestion control method provided by the embodiment of the present application the network device performs dynamic packet RFSP configuration of the user according to the information such as the RUCI, and does not need to modify the subscription information of the UE, and selects different networks/bands/cells according to the user type and service type. Leave or switch control, guide the user to select the frequency by identifying the location of the cell, thereby achieving congestion control and the like.
  • the network congestion control method provided by the embodiment of the present application can control the UE with the lower priority service to access another frequency band/cell.
  • the QoS of the service of the UE with lower priority services is not reduced, so that the effect of congestion control is more significant.
  • FIG. 3 is a schematic flowchart of a network congestion control method according to an embodiment of the present disclosure.
  • a technical solution of the present application is schematically illustrated by using a network device as an MME.
  • the MME provided by the embodiment obtains the congestion information on the RAN side through the RCAF, and uses the information to perform the dynamic RFSP/SPID configuration process, including:
  • the MME receives the congestion information of the RAN sent by the RCAF.
  • the MME configures the RFSP of the UE according to the congestion information of the RAN.
  • the MME sends an SPID corresponding to the RFSP to the RAN.
  • the RAN performs access control on the UE according to the SPID.
  • the UE registers with the Mobile Edge Computing (MEC) after attaching to the network, and reports the geographical location of the UE to the APP deployed in the MEC through the application layer.
  • MEC Mobile Edge Computing
  • the MEC converts the geographic location of the UE into a specific eNB/cell address, it reports the address of the MEC to the SCEF.
  • SCEF initiates a location request, it can request the MEC to acquire the location of the UE.
  • the location of the UE may include, for example, at least one of Global Positioning System (GPS) information, E-UTRAN Cell Global Identifier (ECGI), and the like.
  • GPS Global Positioning System
  • ECGI E-UTRAN Cell Global Identifier
  • steps a to d of FIG. 3 are the same as the attachment process of the prior art, and include the subscriber's subscription RFSP when the HSS sends a location update confirmation message to the MME.
  • S3011 ⁇ S3013 may also be included:
  • the MME sends a message of the congestion information subscription request to the RCAF, where the message may include all the eNB/cell identifiers (IDs) managed by the MME;
  • the RCAF sends a message to the MME for responding to the subscription request.
  • the RAN sends RAN congestion information to the RCAF, where the eNB ID/cell ID may be included.
  • the RAN congestion information sent by the RCAF to the MME may include congestion information of all eNBs/cells managed by the MME.
  • the congestion information of the RAN sent by the RCAF to the MME may specifically include a RUCI of all eNBs/cells managed by the MME and a congestion level list formed by congestion levels of the respective eNB/cells.
  • all eNBs/cells managed under the MME may be congested or partially congested.
  • the eNB/cell in which congestion actually occurs may be determined according to a preset congestion level division rule according to an actual congestion condition, and the eNB/cell that has not actually experienced congestion may determine that the congestion level is a default value.
  • the MME acquires the RUCI of each eNB/cell and its corresponding congestion level, and can further group the users according to the user subscription information, the user location, and the network congestion level, and adjust the value of the RFSP.
  • the MME performs the adjustment of the RFSP, on the one hand, according to the user level, the access priority level of the user level in the congestion area is increased by the user level in the user subscription data; The congestion level of a certain area is high, and the access priority of the lower user level is lowered according to the congestion level.
  • the RAN acquires a corresponding camping control policy according to the SPID value, and specifies that the user camps on the appropriate cell.
  • the MME adjusts the congestion of all the eNBs/cells managed by the MME through the MME, and then adjusts the RFSP of the UE according to the acquired RUCI dynamics, and then sends the corresponding SPID to the RAN. Adjust the user's access priority and control the user's presence to achieve network congestion adjustment.
  • FIG. 4 is a schematic flowchart of a network congestion control method according to an embodiment of the present disclosure.
  • a technical solution of the present application is schematically illustrated by using a network device as an MME.
  • the SCEF provided by the embodiment obtains congestion information of a specific location (eNB/cell) from the RCAF according to different services, and reports to the MME, and the MME uses the information to perform dynamic RFSP/SPID configuration, including :
  • the MME receives the congestion information of the RAN sent by the SCEF.
  • the MME configures the RFSP of the UE according to the congestion information of the RAN.
  • the MME sends an SPID corresponding to the RFSP to the RAN.
  • the RAN performs access control on the UE according to the SPID.
  • APP Application, APP
  • APP Application, APP
  • SCEF SCEF
  • the request may include information such as an APP ID, a user external ID, and a user's location.
  • the SCEF is mainly used for authentication and authorization, and supports external entities to discover networks, policy enforcement, accounting across operators, and related functions of interconnection with external entities.
  • the SCEF can map the internal identifier of the UE to the external identifier of the UE.
  • the SCEF authenticates the service request message according to the external ID and the APP ID of the user to determine whether to initiate a subsequent process. If the authentication is passed, the SCEF converts the geographic location of the UE into an eNB/cell list.
  • the SCEF can determine that the UE may be under that eNB/cell through the location of the UE, and cannot accurately determine the UE location. Therefore, the SCEF generates a list of eNB/cells in which a group of UEs may be located.
  • S4011 ⁇ S4013 may also be included:
  • the SCEF receives a service request sent by the APP, where the location information of the UE is included.
  • the SCEF performs authentication on the UE according to the service request, and determines the RAN list where the UE is located after the authentication is passed.
  • the SCEF sends a message of the congestion information subscription request to the RCAF, where the message may include all the eNB/cell IDs in the RAN list determined in S4012, and may also include the ID of the SCEF.
  • the RCAF sends the RAN congestion information to the SCEF, where the RC of all the eNBs/cells in the RAN list requested by the SCEF may be included.
  • the RCAF may receive the RAN from the RAN side to send RAN congestion information to the RCAF.
  • the RAN congestion information sent by the SCEF to the MME may include all eNB/cell IDs in the RAN list determined in S4012, and all the eNB/cell RUCIs in the RAN list And the identity of the UE, such as IMSI/MSISDN. It can also be understood that all eNBs/cells in the RAN list determined in S4012 may be congested or partially congested.
  • the MME selects the congestion information of the eNB/cell corresponding to the user from the RUCI reported by the SCEF according to the identifier of the UE (IMSI/MSISDN), and then adjusts the RFSP of the UE according to the location of the user, the congestion information, and the subscription information of the user. .
  • the subscription information of the UE can be obtained according to the identifier of the UE.
  • the access priority level of the user level in the congestion area is increased by the user level in the user subscription data;
  • the congestion level of a certain area is high, and the access priority of the lower user level is lowered according to the congestion level.
  • the RAN acquires a corresponding resident control policy according to the SPID value, and specifies that the user camps on the appropriate cell.
  • the network congestion control method provided in this embodiment is performed for a specific user according to a service request of an application.
  • the SCEF requests the RCAF to request the congestion information of the RAN in the location range of the user, and then reports the information to the MME.
  • the MME dynamically adjusts the RFSP according to the congestion information and sends the RFSP to the RAN to adjust the access priority of the user. Switching is controlled to achieve the purpose of specific user network optimization according to the needs of the application.
  • FIG. 5 is a schematic flowchart of a network congestion control method according to an embodiment of the present disclosure.
  • a technical solution of the present application is schematically illustrated by using a network device as a PCRF.
  • the PCRF provided in this embodiment acquires congestion information on the RAN side through RCAF, and uses the information to perform a dynamic RFSP/SPID configuration process, including:
  • the PCRF receives the congestion information of the RAN sent by the RCAF.
  • the PCRF configures the RFSP of the UE according to the congestion information of the RAN.
  • the PCRF sends a SPID sending message to the S-GW.
  • S504 The S-GW forwards the SPID to send the message to the MME.
  • the MME sends an SPID to the RAN.
  • the RAN performs access control on the UE according to the SPID.
  • the eNB when congestion occurs on the RAN side, the eNB sends a congestion information report to the RCAF, and the report may include an eNB/cell ID.
  • S5011 to S5013 may also be included:
  • the RCAF receives the congestion information report sent by the RAN that is congested, and the congestion information report includes the identifier of the RAN where the congestion occurs, that is, the congestion information report carries the eNB/cell ID where congestion occurs;
  • the RCAF sends a UE identity request message to the MME according to the identifier of the RAN that is congested.
  • S5013 The MME sends a UE identity request response message to the RCAF.
  • the response message may include the UE identifier (IMSI/MSISDN) under the eNB/cell corresponding to the identifier of the RAN in S5011 or S5012.
  • the RCAF stores information such as the eNB/cell ID and the UE identity in which the congestion occurs, and transmits the RAN congestion information to the PCRF.
  • the PCRF receives the congestion information of the RAN sent by the RCAF, and may include the RUCI report of the RAN corresponding to the identifier of the RAN in S5011 or S5012 (that is, the RAN that actually has congestion) and the UE identifier.
  • the PCRF adjusts the RFSP of the UE according to the RUCI report of the RAN that is actually congested and the subscription information of the UE. It can be understood that the subscription information of the UE can be obtained according to the identifier of the UE.
  • the SPF is forwarded by the SGW when the SPID is sent, that is, the PCRF can send the SPID delivery message to the MME through the serving gateway S_GW.
  • the PCRF obtains the congestion information of the RAN side by using the RCAF, and then dynamically adjusts the RFSP of the user by using the policy, and sends the corresponding SPID to the RAN side, thereby adjusting the access priority of the user.
  • the user's resident live switch is controlled to achieve the purpose of controlling network congestion.
  • the embodiments of the present application also provide various network devices based on the same ideas as the foregoing method embodiments.
  • the network device can be implemented by using software, hardware, or a combination of software and hardware, and can be used to implement the network congestion control method provided by the foregoing method embodiments.
  • the device part corresponds to the above method, and the corresponding content and technical effect are the same, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. As shown in Figure 6, the network device can be packaged. The acquisition module 61, the configuration module 62, and the transmission module 63 are included.
  • the specific obtaining module 61 is configured to acquire congestion information of the RAN.
  • the configuration module 62 is configured to configure the RFSP of the UE according to the congestion information of the RAN.
  • the sending module 63 is configured to send, to the RAN, an SPID corresponding to the RFSP, where the SPID is used by the RAN to perform access control on the UE according to the SPID.
  • the network device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principles and technical effects are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. This embodiment relates to a specific structure when the network device is an MME.
  • the acquiring module 61 is specifically configured to receive congestion information of the RAN sent by the RCAF, where the congestion information of the RAN includes a first RUCI report and a network congestion level list, where the first RUCI report is the MME The RUCI of all RANs managed.
  • the configuration module 62 is specifically configured to adjust an RFSP of the UE according to the first RUCI report and the network congestion level list.
  • the sending module 63 is further configured to send a message of the congestion information subscription request to the RCAF, where the message of the congestion information subscription request includes identifiers of all RANs managed by the MME.
  • the network device may further include: a receiving module 64, configured to receive a message sent by the RCAF for responding to the subscription request.
  • the network device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principles and technical effects are similar, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present disclosure. This embodiment relates to a specific structure when the network device is an MME.
  • the acquiring module 61 is specifically configured to receive the congestion information of the RAN that is sent by the SCEF, where the congestion information of the RAN includes a second RUCI report, an identifier of all the RANs specified by the SCEF, and an identifier of the UE.
  • the second RUCI report is the RUCI of all RANs specified by the SCEF.
  • the configuration module 62 specifically includes a selecting unit 621 and an adjusting unit 622, where the selecting unit 621 is specifically configured to select, according to the identifier of the UE, the RAN of the UE from the second RUCI report.
  • the congestion information is used to adjust the RFSP of the UE according to the location of the UE, the congestion information of the RAN where the UE is located, and the subscription information of the UE.
  • the network device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principles and technical effects are similar, and details are not described herein again.
  • the network device shown in FIG. 6 may also be a PCRF.
  • the acquiring module 61 is specifically configured to receive congestion information of the RAN sent by the RCAF, where the congestion information of the RAN includes a third RUCI report and an identifier of the UE, and the third RUCI report is a RUCI of the RAN where the congestion occurs.
  • the configuration module 62 is specifically configured to adjust an RFSP of the UE according to the third RUCI report and the subscription information of the UE.
  • the sending module 63 is specifically configured to send, by using the serving gateway S_GW, an SPID sending message to the MME, where the SPID sending message is used by the MME to send the SPID to the RAN according to the SPID sending message.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • the network device can be To include a transceiver 91, a processor 92, a memory 93, and at least one communication bus 94.
  • Communication bus 94 is used to implement a communication connection between components.
  • Memory 93 may include high speed RAM memory, and may also include non-volatile memory NVM, such as at least one disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiments.
  • the transceiver 91 in this embodiment may be a radio frequency module or a baseband module on the network device.
  • the transceiver 91 is configured to acquire congestion information of the radio access network RAN, and the processor 92 is configured to configure a frequency selection priority RFSP of the user equipment UE according to the congestion information of the RAN.
  • the transceiver is further configured to send, to the RAN, a selected priority identifier SPID corresponding to the RFSP, where the SPID is used by the RAN to perform access control on the UE according to the SPID.
  • the network device may be an MME.
  • the transceiver 91 may be configured to receive congestion information of the RAN sent by the RCAF, where the congestion information of the RAN includes a first access network user plane congestion information RUCI report and a network congestion level list.
  • the first RUCI report is the RUCI of all RANs managed by the MME.
  • the processor 92 may be specifically configured to adjust an RFSP of the UE according to the first RUCI report and the network congestion level list.
  • the transceiver 41 is further configured to: send a message of a congestion information subscription request to the RCAF, where the message of the congestion information subscription request includes all RANs managed by the MME An identifier received by the RCAF for responding to the subscription request.
  • the network device may be an MME.
  • the transceiver 91 may be configured to receive congestion information of the RAN sent by the SCEF, where the congestion information of the RAN includes a second RUCI report, an identifier of all RANs specified by the SCEF, and an identifier of the UE.
  • the second RUCI reports the RUCIs of all RANs specified by the SCEF.
  • the processor 92 may be configured to: select, according to the identifier of the UE, the congestion information of the RAN where the UE is located, according to the identifier of the UE; according to the location of the UE The congestion information of the RAN where the UE is located and the subscription information of the UE adjust the RFSP of the UE.
  • the network device may be a PCRF.
  • the transceiver 91 may be specifically configured to receive congestion information of the RAN sent by the RCAF, where the congestion information of the RAN includes a third RUCI report and an identifier of the UE, and the third RUCI reports that congestion occurs.
  • the congestion information of the RAN includes a third RUCI report and an identifier of the UE, and the third RUCI reports that congestion occurs.
  • RAN's RUCI the congestion information of the RAN sent by the RCAF
  • the processor 92 is specifically configured to adjust the RFSP of the UE according to the third RUCI report and the subscription information of the UE.
  • the transceiver 91 is further configured to send, by using the serving gateway S_GW, an SPID sending message to the MME, where the SPID sending message is used by the MME to send a message according to the SPID.
  • the RAN sends the SPID.
  • the network device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principles and technical effects are similar, and details are not described herein again.
  • the embodiment of the present application further provides a communication system, which includes the UE, the RAN, and the network device provided by any of the foregoing embodiments shown in FIG. 6 to FIG.
  • the steps of the method or algorithm described in connection with the disclosure of the present application may be implemented in a hardware manner, or may be implemented by a processor executing a software instruction, or may be implemented by a computer program product.
  • the software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the user equipment. Of course, the processor and the storage medium may also reside as discrete components in the user equipment.
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.
  • the disclosed systems, devices, and methods may be implemented in other manners without departing from the scope of the present application.
  • the embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed.
  • the units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. .
  • Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.
  • the described systems, devices, and methods, and the schematic diagrams of various embodiments may be combined or integrated with other systems, modules, techniques or methods without departing from the scope of the present application.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in electronic, mechanical or other form.

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Abstract

本申请实施例提供一种网络拥塞控制方法、设备及系统，根据用户类型、业务类型及用户位置，动态地对用户的驻留或切换进行控制，从而达到拥塞控制的目的。网络设备根据接入网用户面拥塞信息等信息进行动态的用户的分组RFSP配置，不需要修改UE的签约信息，根据用户类型和业务类型选择不同的网络/频段/小区进行驻留或切换控制，通过识别小区位置，引导用户进行选频，从而达到拥塞控制等目的。

Description

网络拥塞控制方法、设备及系统 技术领域
本申请实施例涉及通信技术，尤其涉及一种网络拥塞控制方法、设备及系统。
背景技术
随着智能终端的普及，各类第三方应用(Over the Top，OTT)业务的兴起，使得网络流量急剧增加，而无线资源的相对有限使无线小区拥塞成为常态。
在用户面拥塞管理(User Plane Congestion management，UPCON)架构中，无线接入网拥塞感知功能(RAN Congestion Awareness Function，RCAF)获取无线接入网(Radio Access Network，RAN)侧的拥塞信息，并从移动性管理实体(Mobility Management Entity，MME)获取发生拥塞的演进型基站(evolved NodeB，eNB)、小区下的用户身份，如国际移动用户识别码(International Mobile Subscriber Identity，IMSI)或接入点(Access Point Name，APN)；然后将每个用户设备(User Equipmnt，UE)的接入网用户面拥塞信息(RAN User Plane Congestion Information，RUCI)发送给策略和计费规则功能(Policy and Charging Rules Function，PCRF)，由PCRF及演进型分组核心网(Evolved Packet Core，EPC)网关负责业务优先级策略的制定、业务流的识别和优先级标识分配，并将该优先级标识传递给RAN(无线接入网)侧，再由RAN侧根据业务优先级标识对不同业务执行差异化的优先级调度。
现有技术中，根据业务类型调节无线资源分配策略，通过无线资源的优化配置实现拥塞控制。然而，当某一频段/小区的大量UE均有较高优先级的业务请求时，根据业务类型调节无线资源分配策略实现拥塞控制的效果并不显著。
发明内容
本申请实施例提供一种网络拥塞控制方法、设备及系统，根据用户类型、业务类型及用户位置，动态地对用户的驻留或切换进行控制，从而达到拥塞控制的目的。
本申请实施例第一方面提供一种网络拥塞控制方法，包括：
网络设备获取RAN的拥塞信息；
所述网络设备根据所述RAN的拥塞信息配置用户设备UE的RAT/频率选择优先级(RAT/Frequency Selection Priority，RFSP)；
所述网络设备向所述RAN发送与所述RFSP对应的选择优先级识别码(Selection Priority Identify，SPID)，所述SPID用于所述RAN根据所述SPID对所述UE进行接入控制。
上述提供的网络拥塞控制方法，网络设备根据接入网用户面拥塞信息(RAN User Plane Congestion Information，RUCI)等信息进行动态的用户的分组RFSP配置，不需要修改UE的签约信息，根据用户类型和业务类型选择不同的网络/频段/小区进行驻留或切换控制，通过识别小区位置，引导用户进行选频，从而达到拥塞控制等目的。当某一频段/小 区的大量UE均有较高优先级的业务请求时，通过执行本申请实施例提供的网络拥塞控制方法，可以控制具有较低优先级业务的UE接入另一频段/小区，而并非降低具有较低优先级业务的UE的业务的QoS，使得拥塞控制的效果更为显著。
在一种可能的设计中，所述网络设备为移动性管理实体(Mobility Management Entity，MME)，所述网络设备获取RAN的拥塞信息，包括：所述MME接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第一接入网用户面拥塞信息RUCI报告和网络拥塞等级列表，所述第一RUCI报告为所述MME所管理的所有RAN的RUCI。
进一步的，所述网络设备根据所述RAN的拥塞信息配置UE的RFSP，包括：所述MME根据所述第一RUCI报告和所述网络拥塞等级列表，调整所述UE的RFSP。
在一种可能的设计中，所述MME接收RCAF发送的RAN的拥塞信息之前，还包括：所述MME向所述RCAF发送拥塞信息订阅请求的消息，所述拥塞信息订阅请求的消息包括所述MME所管理的所有RAN的标识；所述MME接收所述RCAF发送的用于响应所述订阅请求的消息。
上述各可能的设计提供的网络拥塞控制方法，MME通过RCAF上报的MME下所管理的所有的eNB/cell的拥塞情况，然后根据获取的RUCI动态的调整UE的RFSP，再将对应的SPID下发给RAN，调整用户的接入优先级，对用户的驻留进行控制，从而达到网络拥塞调节的目的。
在一种可能的设计中，所述网络设备为MME，所述网络设备获取RAN的拥塞信息，包括：所述MME接收业务能力开放功能(Service Capability Exposure Function，SCEF)发送的RAN的拥塞信息，所述RAN的拥塞信息包括第二RUCI报告、UE的标识和所述SCEF指定的所有RAN的标识，所述第二RUCI报告为所述SCEF指定的所有RAN的RUCI。
进一步的，所述网络设备根据所述RAN的拥塞信息配置UE的RFSP，包括：所述MME根据所述UE的标识从所述第二RUCI报告中选出所述UE所在的RAN的拥塞信息；所述MME根据所述UE的位置、所述UE所在的RAN的拥塞信息以及所述UE的签约信息配置所述UE的RFSP。
在一种可能的设计中，所述MME接收SCEF发送的RAN的拥塞信息之前，还包括：所述SCEF接收应用程序发送的业务请求，所述业务请求包括所述UE的位置信息；所述SCEF根据所述UE的位置信息确定所述UE所在的RAN列表，所述RAN列表中的RAN为所述SCEF指定的所有RAN；所述SCEF向所述RCAF发送拥塞信息订阅请求的消息，所述拥塞信息订阅请求的消息包括所述SCEF指定的所有RAN的标识；所述SCEF接收所述RCAF发送的第二RUCI报告。
上述各可能的设计提供的网络拥塞控制方法，根据应用程序的业务请求，针对特定用户进行SPID配置，SCEF向RCAF请求用户所在位置范围的RAN的拥塞信息，然后上报给MME，MME根据拥塞信息动态调整RFSP并下发给RAN，从而调整用户的接入优先级，对用户的驻留或切换进行控制，从而根据应用的需求达到特定用户网络优化的目的。
在一种可能的设计中，所述网络设备为PCRF，所述网络设备获取RAN的拥塞信息，包括：所述PCRF接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第三RUCI报告和UE的标识，所述第三RUCI报告为发生拥塞的RAN的RUCI。
进一步的，所述网络设备根据所述RAN的拥塞信息配置UE的RFSP，包括：所述PCRF根据所述第三RUCI报告和所述UE的签约信息，调整所述UE的RFSP。
在一种可能的设计中，所述网络设备向RAN发送与所述RFSP对应的SPID，包括：所述PCRF通过服务网关S_GW向MME发送SPID下发消息，所述SPID下发消息用于所述MME根据所述SPID下发消息向RAN发送所述SPID。
在一种可能的设计中，所述PCRF接收RCAF发送的RAN的拥塞信息之前，还包括：RCAF接收发生拥塞的RAN发送的拥塞信息报告，所述拥塞信息报告包括发生拥塞的RAN的标识；所述RCAF根据所述发生拥塞的RAN的标识向MME发送UE身份请求消息；所述RCAF接收所述MME发送的UE身份请求应答消息，所述UE身份请求应答消息包括所述发生拥塞的RAN下的UE的标识。
上述各可能的设计提供的网络拥塞控制方法，PCRF通过RCAF获取RAN侧的拥塞信息，然后通过策略动态的调整用户的RFSP，并将对应的SPID下发到RAN侧，从而调整用户的接入优先级，对用户的驻留活切换进行控制，从而达到控制网络拥塞的目的。
第二方面，为了实现上述第一方面的网络拥塞控制方法，本申请实施例提供了一种网络设备，该网络设备具有实现上述网络拥塞控制方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在第二方面的一种可能的实现方式中，该网络设备包括多个功能模块或单元，用于实现上述第一方面中的任一种网络拥塞控制方法。
在第二方面的另一种可能的实现方式中，该网络设备的结构中可以包括处理器和收发器。所述处理器被配置为支持该装置执行上述第一方面中任一种网络拥塞控制方法中相应的功能。所述收发器用于支持该装置与其他网络设备之间的通信，例如可以为相应的射频模块或者基带模块。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该网络设备执行上述网络拥塞控制方法必要的程序指令和数据。
可选的，该网络设备可以为MME，还可以为PCRF。
第三方面，本申请实施例提供了一种计算机存储介质，用于储存为上述网络设备所用的计算机软件指令，其包含用于执行上述第一方面所设计的程序。
第四方面，本申请实施例提供一种计算机程序产品，其包含指令，当所述计算机程序被计算机所执行时，该指令使得计算机执行上述方法中网络设备所执行的功能。
第五方面，本申请实施例提供一种业务能力开放功能网元，该网元具有实现上述网络拥塞控制方法中所述SCEF所执行步骤的功能。
第六方面，本申请实施例提供一种无线接入网拥塞感知功能网元，该网元具有实现上述网络拥塞控制方法中所述RCAF所执行步骤的功能。
第七方面，提供一种通信系统，包括UE、RAN以及上述第二方面或第三方面提供的网络设备。
在第七方面一种可能的设计中，所述系统还包括上述第五方面和第六方面提供的网元。
相较于现有技术，本申请实施例所提供的方法、设备和系统，网络设备根据RUCI等信息进行动态的用户的分组RFSP配置，不需要修改UE的签约信息，根据用户类型和业 务类型选择不同的网络/频段/小区进行驻留或切换控制，通过识别小区位置，引导用户进行选频，从而达到拥塞控制等目的。当某一频段/小区的大量UE均有较高优先级的业务请求时，通过执行本申请实施例提供的网络拥塞控制方法，可以控制具有较低优先级业务的UE接入另一频段/小区，而并非降低具有较低优先级业务的UE的业务的QoS，使得拥塞控制的效果更为显著。
附图说明
图1为本申请实施例提供的一种移动网络架构示意图；
图2为本申请实施例提供的网络拥塞控制方法流程示意图；
图3为本申请实施例提供的网络拥塞控制方法流程示意图；
图4为本申请实施例提供的网络拥塞控制方法流程示意图；
图5为本申请实施例提供的网络拥塞控制方法流程示意图；
图6为本申请实施例提供的网络设备的结构示意图；
图7为本申请实施例提供的网络设备的结构示意图；
图8为本申请实施例提供的网络设备的结构示意图；
图9为本申请实施例提供的网络设备的结构示意图。
具体实施方式
本申请实施例提供的技术方案，适用于移动通信网络中。本申请实施例中的移动通信网络，是指不同网元类型、传输网络和网络管理子系统的结合。不同网元类型承担不同的网络功能，如基站(Base Transceiver Station，BTS)、控制器、核心网(Core Network，CN)等。传输网络用于连接网元，网络管理子系统用于对网元、传输网络进行管理。
本申请实施例中的UE，主要是指便于携带的轻型移动终端，如智能手机、平板电脑、PAD等。移动网络与移动终端之间，通过无线接口互通，无线接口可采用多种无线技术。例如，无线接口可采用的无线技术包括第四代移动通信技术(the 4th Generation mobile communication technology，4G)，还可以是目前正在研究的第五代移动通信技术(the 5th Generation mobile communication technology，5G)，甚至后续研究的其他移动通信技术。
网络拥塞控制是目前多数运营商的共同需求，受到3GPP组织和国内行业标准组织的关注。3GPP网络架构场景下，针对网络拥塞，定义了小区资源耗尽和回传链路资源不足的两种拥塞场景，并定义了用户层面的业务控制、应用层面的数据控制、差异化计费等13种拥塞管理场景。网络拥塞控制的技术方案制定主要涉及用户面拥塞的感知和用户面拥塞的缓解方法。针对拥塞感知和缓解，目前研究提出的技术方案主要有两大类：1)基于核心网的拥塞管理方法：即核心网实时参与拥塞的管理过程，RAN通过某种方法将拥塞信息传递到PCRF，由PCRF基于收到的拥塞信息进行针对性的策略下发；2)基于RAN的拥塞管理方法：即拥塞信息无需上报至核心网，当拥塞发生时，由无线网络基于预先定义的规则进行相应的处理。
基于核心网的拥塞管理方法的前提是拥塞信息的上报，即无线网络通过相应的方法将拥塞发生的信息传递到PCRF。其中一种备选方案是：Off-path拥塞信息上报方法。即拥 塞信息不通过EPC主设备传递，在网络中新增一个RCAF实体，基于无线网管能监控无线网络拥塞的天然特性，从网管中获取网络拥塞信息，加以整理和用户信息补充，将拥塞小区及受影响的用户信息发送至PCRF。这种方案大部分工作放在主设备之外的功能实体上去完成，对主设备影响小，且具有较好的部署灵活性。
图1为一种UPCON架构示意图，引入Off-path拥塞信息上报方案后的EPC架构如图1所示。如图1所示，该系统架构中的逻辑功能单元主要包括：
(1)RAN：包含eNB或小区(cell)，为终端的接入提供无线资源，可以提供更高的上下行速率，更低的传输延迟和更加可靠的无线传输。
(2)业务能力开放功能(Service Capability Exposure Function，SCEF)：用于认证授权，支持外部实体发现网络、策略执行、跨运营商的记账、与外部实体互联的相关功能等。
(3)MME：用于核心网络的控制平面管理，其主要功能包括移动性管理、会话管理、接入控制、网元选择、存储用户上下文等。
(4)归属用户服务器(Home Subscriber Server，HSS)：用于存储用户签约信息的服务器，主要负责管理用户的签约数据及移动用户的位置信息。
(5)RCAF：通过RAN的操作管理维护(Operation Administration and Maintenance，OAM)信息收集RAN用户面拥塞信息，通过Np接口向PCRF发送RUCI，通过Nq接口从MME获取处在拥塞状态的eNB或小区下的UE身份信息。
(6)服务网关(Serving GateWay，S-GW)：是一个用户面实体，负责用户面数据路由处理，终结处于空闲态的UE下行数据；管理和存储UE的系统结构演进(System Architecture Evolution，SAE)承载上下文，是3GPP系统内部用户面的锚点。
(7)分组数据网网关(Packet Data Network GateWay，P-GW)：负责UE接入分组数据网(Packet Data Network，PDN)的网关，分配用户IP地址，同时是3GPP和非3GPP接入系统的移动性锚点。
(8)PCRF：该功能实体包含策略控制决策和基于流计费控制的功能。
(9)流量检测功能(Traffic Detection Function，TDF)：执行应用程序检测和报告检测到应用程序和其服务数据流量描述给PCRF。
在UPCON架构中，增加了RCAF，它与OAM交互获知eNB或小区的拥塞信息，通过Nq/Nq’接口向MME查询拥塞小区中当前受影响的用户及APN信息，RCAF进行多普勒雷达(Doppler radar，DRA)查询对应的PCRF，通过Np接口将拥塞小区及对应的用户信息发送给相应的PCRF。PCRF为支持基于网络状态的策略管理，需增强支持Np接口，用于从RCAF处收集拥塞信息，并基于用户面拥塞信息、用户签约、应用类型、内容类型等决定控制策略。MME/SGSN需要增强支持Nq/Nq’接口，上报或应RCAF的要求响应拥塞小区内的用户信息。OAM需要增强，使其可向RCAF提供包括小区负荷在内的相关拥塞信息。RCAF无线网络状态感知功能实体对该地区进行密切的、动态的监控，一旦从网管处获知网络处于物理资源的分配耗尽、掉话率急增等异常拥塞的状况，即启动向PCRF的状态上报，PCRF通过Np接口获知了异常拥塞小区的名单，及这些小区下的活动用户的名单，由PCRF根据运营商的策略下发基于网络状态的拥塞管理策略。如可实现基于用户级别的差异化拥塞管理，为保证重要用户的业务体验，仅针对级别较低的用户的服务质量(Quality of Service，QoS)加以干预，缓解整体小区拥塞状况的同时，重要用户的体验 也得到了提升。也可以针对业务价值实现差异化的QoS策略，为保证价值业务的用户体验，降低所有用户低价值业务的QoS，缓解小区拥塞状况的同时，价值业务用户的体验也得到了提升，可吸引更多的用户签约价值业务。
然而，现有技术中，根据业务类型调节无线资源分配策略，通过无线资源的优化配置实现拥塞控制的方案，当某一频段/小区的大量UE均有较高优先级的业务请求时，根据业务类型调节无线资源分配策略实现拥塞控制的效果并不显著。
为了解决上述问题，本申请实施例提供一种网络拥塞控制方法。本申请的实施例将以图1所示3GPP系统为例对本申请的应用场景做示意性说明。下面以具体的实施例对本申请的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
图2为本申请实施例提供的网络拥塞控制方法流程示意图，如图2所示，本实施例提供的网络拥塞控制方法，包括：
S201，网络设备获取RAN的拥塞信息；
示例性的，RAN侧的拥塞信息可能包括RUCI报告、网络拥塞等级列表、RAN的标识和UE的标识等信息中的一种或多种。
S202，网络设备根据所述RAN的拥塞信息配置UE的RFSP；
S203，网络设备向RAN发送与所述RFSP对应的SPID；
需要说明的是，SPID在核心网侧称为RFSP，这个信元可以由用户签约信息指定(保存在HSS中)，也可以由MME或PCRF指定，该信元传递到RAN侧之后，可以用于灵活控制终端的行为策略(如指定终端驻留和切换频点的优先级等，以减少网络无用信令)。
S204，RAN根据所述SPID对UE进行接入控制。
示例性的，网络设备可以是负责移动性管理的网元(MME)，或者还可以是策略与计费规则功能网元(PCRF)。
示例性的，网络设备可以接收RCAF定期地或由事件触发地，向网络设备上报的RAN侧的拥塞信息，例如RCAF可以向MME上报RAN侧的拥塞信息，RCAF还可以向PCRF上报RAN侧的拥塞信息上报RAN侧的拥塞信息。
示例性的，网络设备也可能接收其他网元上报的RAN侧的拥塞信息，例如MME可以接收SCEF上报的RAN侧的拥塞信息。
本申请实施例提供的网络拥塞控制方法，网络设备根据RUCI等信息进行动态的用户的分组RFSP配置，不需要修改UE的签约信息，根据用户类型和业务类型选择不同的网络/频段/小区进行驻留或切换控制，通过识别小区位置，引导用户进行选频，从而达到拥塞控制等目的。当某一频段/小区的大量UE均有较高优先级的业务请求时，通过执行本申请实施例提供的网络拥塞控制方法，可以控制具有较低优先级业务的UE接入另一频段/小区，而并非降低具有较低优先级业务的UE的业务的QoS，使得拥塞控制的效果更为显著。
图3为本申请实施例提供的一种网络拥塞控制方法流程示意图，本实施例以网络设备为MME为例对本申请的技术方案进行示意性说明。
如图3所示，本实施例提供的MME通过RCAF获取RAN侧的拥塞信息，并利用该信息进行动态的RFSP/SPID配置的过程，包括：
S301，MME接收RCAF发送的RAN的拥塞信息；
S302，MME根据RAN的拥塞信息配置UE的RFSP；
S303，MME向RAN下发与所述RFSP对应的SPID；
S304，RAN根据SPID对UE进行接入控制。
可以理解的，UE在附着到网络后向移动边缘计算(Mobile Edge Computing，MEC)注册，通过应用层向部署在MEC中的APP上报UE的地理位置。MEC将UE的地理位置转化成具体的eNB/cell地址后，向SCEF上报MEC的地址，当SCEF要发起位置请求时，就可以向MEC请求获取UE的位置。UE的位置例如可以包括全球定位系统(Global Positioning System，GPS)信息、E-UTRAN小区全局标识符(E-UTRAN Cell Global Identifier，ECGI)等中的至少一种。
可选的，在S301之前，还包括UE附着到网络的过程。如图3中步骤a～d所示，步骤a～d与现有技术的附着过程相同，当HSS向MME发送位置更新确认消息时包括用户的签约RFSP。
可选的，在S301之前，还可能包括S3011～S3013：
S3011，MME向RCAF发送拥塞信息订阅请求的消息，该消息中可以包含该MME下所管理的所有的eNB/cell标识(Identify，ID)；
S3012，RCAF向MME发送用于响应所述订阅请求的消息；
S3013，RAN向RCAF发送RAN的拥塞信息，其中可能包含eNB ID/cell ID。
进一步的，在S301中，可选的，RCAF向MME发送的RAN的拥塞信息，可以包含该MME下所管理的所有的eNB/cell的拥塞信息。示例性的，RCAF向MME发送的RAN的拥塞信息具体可以包括MME下所管理的所有的eNB/cell的RUCI以及各个eNB/cell的拥塞等级构成的拥塞等级列表。显然，该MME下所管理的所有的eNB/cell可能都发生拥塞，也可能部分发生拥塞。对于实际发生拥塞的eNB/cell可以根据实际拥塞情况按照预先设定的拥塞等级划分规则来确定其拥塞等级，对于实际还没有发生拥塞的eNB/cell可以确定其拥塞等级为一默认值。
在S302中，MME获取各eNB/cell的RUCI以及其对应的拥塞等级，进而可以结合用户签约信息、用户位置、网络拥塞等级，对用户进行分组，调整RFSP的值。示例性的，MME在进行RFSP的调整时，一方面，根据用户级别，通过用户签约数据中的用户级别，将发生拥塞区域用户级别较高的接入优先级调高；另一方面，根据区域的拥塞等级，某一区域的拥塞级别高，则根据拥塞级别将其中用户级别较低的接入优先级调低。
在S304中，RAN获取SPID后，根据该SPID值获取对应的驻留控制策略，指定用户驻留到合适的小区。
本实施例提供的网络拥塞控制方法，MME通过RCAF上报的MME下所管理的所有的eNB/cell的拥塞情况，然后根据获取的RUCI动态的调整UE的RFSP，再将对应的SPID下发给RAN，调整用户的接入优先级，对用户的驻留进行控制，从而达到网络拥塞调节的目的。
图4为本申请实施例提供的一种网络拥塞控制方法流程示意图，本实施例以网络设备为MME为例对本申请的技术方案进行示意性说明。
如图4所示，本实施例提供的SCEF根据不同业务，从RCAF获取特定位置(eNB/cell)的拥塞信息，并向MME上报，MME利用该信息进行动态的RFSP/SPID配置的过程，包括：
S401，MME接收SCEF发送的RAN的拥塞信息；
S402，MME根据RAN的拥塞信息配置UE的RFSP；
S403，MME向RAN下发与所述RFSP对应的SPID；
S404，RAN根据SPID对UE进行接入控制。
可以理解的，某些应用程序(Application，APP)为了优化服务，会向SCEF发送业务请求，该请求中可能包含APP ID，用户外部ID，用户的位置等信息。
需要说明的是，SCEF主要用于认证授权，支持外部实体发现网络、策略执行、跨运营商的记账、与外部实体互联的相关功能，SCEF可以将UE内部标识映射为UE外部标识。SCEF根据用户的外部ID与APP ID对业务请求消息进行鉴权决定是否发起后续流程。若鉴权通过，SCEF将UE的地理位置转换为eNB/cell列表。
还需要说明的是，SCEF能够通过UE的位置大致的判断UE可能在那个eNB/cell下，并不能精确的判断UE位置，因此SCEF会生成一组UE可能所在的eNB/cell列表。
可选的，在S401之前，还可能包括S4011～S4013：
S4011，SCEF接收APP发送的业务请求，其中包括UE的位置信息；
S4012，SCEF根据业务请求对UE进行鉴权，鉴权通过后确定UE所在的RAN列表；
S4013，SCEF向RCAF发送拥塞信息订阅请求的消息，该消息中可以包含在S4012中所确定的RAN列表中所有的eNB/cell ID，还可能包括SCEF的ID。
S4014，RCAF向SCEF发送RAN的拥塞信息，其中可能包含SCEF所请求的RAN列表中所有的eNB/cell的RUCI。
可以理解的是，在S4014之前，RCAF可能会从RAN侧接收RAN向RCAF发送RAN的拥塞信息。
进一步的，在S401中，可选的，SCEF向MME发送的RAN的拥塞信息，可以包含在S4012中所确定的RAN列表中所有的eNB/cell ID，该RAN列表中所有的eNB/cell的RUCI，以及UE的标识，如IMSI/MSISDN。同样可以理解的，在S4012中所确定的RAN列表中所有的eNB/cell可能都发生拥塞，也可能部分发生拥塞。
在S402中，MME根据UE的标识(IMSI/MSISDN)从SCEF上报的RUCI中选出对应用户所在eNB/cell的拥塞信息，然后根据用户的位置、拥塞信息及用户的签约信息来调整UE的RFSP。可以理解的是，UE的签约信息可以根据UE的标识获取。示例性的，MME在进行RFSP的调整时，一方面，根据用户级别，通过用户签约数据中的用户级别，将发生拥塞区域用户级别较高的接入优先级调高；另一方面，根据区域的拥塞等级，某一区域的拥塞级别高，则根据拥塞级别将其中用户级别较低的接入优先级调低。
在S404中，RAN获取SPID后，根据该SPID值获取对应的驻留控制策略，指定用户驻留到合适的小区。
本实施例提供的网络拥塞控制方法，根据应用程序的业务请求，针对特定用户进行 SPID配置，SCEF向RCAF请求用户所在位置范围的RAN的拥塞信息，然后上报给MME，MME根据拥塞信息动态调整RFSP并下发给RAN，从而调整用户的接入优先级，对用户的驻留或切换进行控制，从而根据应用的需求达到特定用户网络优化的目的。
图5为本申请实施例提供的一种网络拥塞控制方法流程示意图，本实施例以网络设备为PCRF为例对本申请的技术方案进行示意性说明。
如图5所示，本实施例提供的PCRF通过RCAF获取RAN侧的拥塞信息，并利用该信息进行动态的RFSP/SPID配置的过程，包括：
S501，PCRF接收RCAF发送的RAN的拥塞信息；
S502，PCRF根据RAN的拥塞信息配置UE的RFSP；
S503，PCRF向S-GW发送SPID下发消息；
S504，S-GW转发SPID下发消息至MME；
S505，MME向RAN发送SPID；
S506，RAN根据SPID对UE进行接入控制。
可以理解的，在相关技术中，当RAN侧发生拥塞时，eNB会向RCAF发送拥塞信息报告，该报告可能包括eNB/cell ID。
在本申请实施例中，可选的，在S501之前，还可能包括S5011～S5013：
S5011，RCAF接收发生拥塞的RAN发送的拥塞信息报告，该拥塞信息报告包括发生拥塞的RAN的标识，即该拥塞信息报告中携带发生拥塞的eNB/cell ID；
S5012，RCAF根据发生拥塞的RAN的标识向MME发送UE身份请求消息；
S5013，MME向RCAF发送UE身份请求应答消息；
示例性的，应答消息中可以包括S5011或S5012中RAN的标识对应的eNB/cell下的UE标识(IMSI/MSISDN)。进而，RCAF保存发生拥塞的eNB/cell ID以及UE标识等信息，并向PCRF发送RAN的拥塞信息。
进一步的，在S501中，可选的，PCRF接收RCAF发送的RAN的拥塞信息，可以包括S5011或S5012中RAN的标识对应的RAN(即实际发生拥塞了的RAN)的RUCI报告以及UE标识。
在S502中，PCRF根据实际发生拥塞了的RAN的RUCI报告和UE的签约信息，调整UE的RFSP。可以理解的是，UE的签约信息可以根据UE的标识获取。
在S504中，由于PCRF与MME之间目前没有接口，因此在SPID下发的时候通过SGW转发，即PCRF可以通过服务网关S_GW向MME发送SPID下发消息。
本实施例提供的网络拥塞控制方法，PCRF通过RCAF获取RAN侧的拥塞信息，然后通过策略动态的调整用户的RFSP，并将对应的SPID下发到RAN侧，从而调整用户的接入优先级，对用户的驻留活切换进行控制，从而达到控制网络拥塞的目的。
基于与上述方法实施例相同的思想，本申请实施例还提供多种网络设备。该多种网络设备可以通过软件、硬件或者软硬结合的方式实现，可以用于实现上述方法实施例提供的网络拥塞控制方法。其中装置部分与上述方法对应，对应内容和技术效果相同，在此不再赘述。
图6为本申请实施例提供的网络设备的结构示意图。如图6所示，该网络设备可以包 括：获取模块61、配置模块62和发送模块63。
具体的获取模块61，用于获取RAN的拥塞信息。配置模块62，用于根据RAN的拥塞信息配置UE的RFSP。发送模块63用于向RAN发送与所述RFSP对应的SPID，所述SPID用于所述RAN根据所述SPID对所述UE进行接入控制。
本申请实施例提供的网络设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
图7为本申请实施例提供的网络设备的结构示意图。本实施例涉及的是当网络设备为MME时的具体结构。
在本实施例中，所述获取模块61具体用于接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第一RUCI报告和网络拥塞等级列表，所述第一RUCI报告为所述MME所管理的所有RAN的RUCI。
在本实施例中，所述配置模块62，具体用于根据所述第一RUCI报告和所述网络拥塞等级列表，调整所述UE的RFSP。
可选的，本实施例中，所述发送模块63，还用于向所述RCAF发送拥塞信息订阅请求的消息，所述拥塞信息订阅请求的消息包括所述MME所管理的所有RAN的标识。
在上述图6所示实施例的基础上，进一步地，如图7所示，该网络设备还可以包括：接收模块64，用于接收所述RCAF发送的用于响应所述订阅请求的消息。
本申请实施例提供的网络设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
图8为本申请实施例提供的网络设备的结构示意图。本实施例涉及的是当网络设备为MME时的具体结构。
在本实施例中，所述获取模块61具体用于接收SCEF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第二RUCI报告、所述SCEF指定的所有RAN的标识和UE的标识，所述第二RUCI报告为所述SCEF指定的所有RAN的RUCI。
在本实施例中，所述配置模块62具体包括选择单元621和调整单元622，选择单元621具体用于根据所述UE的标识从所述第二RUCI报告中选出所述UE所在的RAN的拥塞信息；调整单元622具体用于根据所述UE的位置、所述UE所在的RAN的拥塞信息以及所述UE的签约信息调整所述UE的RFSP。
本申请实施例提供的网络设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
可选的，在一种可能的实施方式中，上述图6所示的网络设备还可以是PCRF。所述获取模块61具体用于接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第三RUCI报告和UE的标识，所述第三RUCI报告为发生拥塞的RAN的RUCI。进一步的，所述配置模块62具体用于根据所述第三RUCI报告和所述UE的签约信息，调整所述UE的RFSP。进一步的，发送模块63具体用于通过服务网关S_GW向MME发送SPID下发消息，所述SPID下发消息用于所述MME根据所述SPID下发消息向RAN发送所述SPID。
图9为本申请实施例提供的网络设备的结构示意图。如图9所示，该网络设备可 以包括收发器91、处理器92、存储器93和至少一个通信总线94。通信总线94用于实现元件之间的通信连接。存储器93可能包含高速RAM存储器，也可能还包括非易失性存储NVM，例如至少一个磁盘存储器，存储器93中可以存储各种程序，用于完成各种处理功能以及实现本实施例的方法步骤。可选的，本实施例中的收发器91可以为网络设备上的射频模块或者基带模块。
本实施例中，所述收发器91，用于获取无线接入网RAN的拥塞信息；所述处理器92，用于根据所述RAN的拥塞信息配置用户设备UE的频率选择优先级RFSP；所述收发器还用于向所述RAN发送与所述RFSP对应的选择优先级识别码SPID，所述SPID用于所述RAN根据所述SPID对所述UE进行接入控制。
可选的，作为本实施例的一种可能的实施方式，该实施方式中，网络设备可以是MME。
在该实施方式中，所述收发器91，具体可以用于接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第一接入网用户面拥塞信息RUCI报告和网络拥塞等级列表，所述第一RUCI报告为所述MME所管理的所有RAN的RUCI。
进一步的，在该实施方式中，上述处理器92具体可以用于根据所述第一RUCI报告和所述网络拥塞等级列表，调整所述UE的RFSP。
可选的，在该实施方式中，所述收发器41，还可以用于：向所述RCAF发送拥塞信息订阅请求的消息，所述拥塞信息订阅请求的消息包括所述MME所管理的所有RAN的标识；接收所述RCAF发送的用于响应所述订阅请求的消息。
可选的，作为本实施例的一种可能的实施方式，该实施方式中，网络设备可以是MME。
在该实施方式中，所述收发器91，具体可以用于接收SCEF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第二RUCI报告、所述SCEF指定的所有RAN的标识和UE的标识，所述第二RUCI报告为所述SCEF指定的所有RAN的RUCI。
进一步的，在该实施方式中，上述处理器92具体可以用于：根据所述UE的标识从所述第二RUCI报告中选出所述UE所在的RAN的拥塞信息；根据所述UE的位置、所述UE所在的RAN的拥塞信息以及所述UE的签约信息调整所述UE的RFSP。
可选的，作为本实施例的一种可能的实施方式，该实施方式中，网络设备可以是PCRF。
在该实施方式中，所述收发器91，具体可以用于接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第三RUCI报告和UE的标识，所述第三RUCI报告为发生拥塞的RAN的RUCI。
进一步的，在该实施方式中，上述处理器92具体可以用于根据所述第三RUCI报告和所述UE的签约信息，调整所述UE的RFSP。
可选的，在该实施方式中，上述收发器91，具体还用于通过服务网关S_GW向MME发送SPID下发消息，所述SPID下发消息用于所述MME根据所述SPID下发消息向RAN发送所述SPID。
本申请实施例提供的网络设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
另外，本申请实施例还提供一种通信系统，其中包括UE、RAN以及上述图6～图9所示任一实施例提供的网络设备。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现，也可以通过计算机程序产品实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于用户设备中。当然，处理器和存储介质也可以作为分立组件存在于用户设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、设备和方法，在没有超过本申请的范围内，可以通过其他的方式实现。例如，以上所描述的实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。
另外，所描述系统、设备和方法以及不同实施例的示意图，在不超出本申请的范围内，可以与其它系统，模块，技术或方法结合或集成。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电子、机械或其它的形式。
可以理解，本申请实施例中出现的“多个”是指两个或两个以上。本申请实施例中出现的“第一”、“第二”等描述，仅作示意与区分描述对象之用，没有次序之分，也不表示本申请实施例中对设备个数的特别限定，不能构成对本申请实施例的任何限制。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (21)

  1. 一种网络拥塞控制方法，其特征在于，包括：
    网络设备获取无线接入网RAN的拥塞信息；
    所述网络设备根据所述RAN的拥塞信息配置用户设备UE的频率选择优先级RFSP；
    所述网络设备向所述RAN发送与所述RFSP对应的选择优先级识别码SPID，所述SPID用于所述RAN根据所述SPID对所述UE进行接入控制。
  2. 根据权利要求1所述的方法，其特征在于，所述网络设备为移动性管理实体MME，所述网络设备获取RAN的拥塞信息，包括：
    所述MME接收无线接入网拥塞感知功能RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第一接入网用户面拥塞信息RUCI报告和网络拥塞等级列表，所述第一RUCI报告为所述MME所管理的所有RAN的RUCI。
  3. 根据权利要求2所述的方法，其特征在于，所述网络设备根据所述RAN的拥塞信息配置UE的RFSP，包括：
    所述MME根据所述第一RUCI报告和所述网络拥塞等级列表，调整所述UE的RFSP。
  4. 根据权利要求2或3所述的方法，其特征在于，所述MME接收RCAF发送的RAN的拥塞信息之前，还包括：
    所述MME向所述RCAF发送拥塞信息订阅请求的消息，所述拥塞信息订阅请求的消息包括所述MME所管理的所有RAN的标识；
    所述MME接收所述RCAF发送的用于响应所述订阅请求的消息。
  5. 根据权利要求1所述的方法，其特征在于，所述网络设备为MME，所述网络设备获取RAN的拥塞信息，包括：
    所述MME接收业务能力开放功能SCEF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第二RUCI报告、UE的标识和所述SCEF指定的所有RAN的标识，所述第二RUCI报告为所述SCEF指定的所有RAN的RUCI。
  6. 根据权利要求5所述的方法，其特征在于，所述网络设备根据所述RAN的拥塞信息配置UE的RFSP，包括：
    所述MME根据所述UE的标识从所述第二RUCI报告中选出所述UE所在的RAN的拥塞信息；
    所述MME根据所述UE的位置、所述UE所在的RAN的拥塞信息以及所述UE的签约信息配置所述UE的RFSP。
  7. 根据权利要求5或6所述的方法，其特征在于，所述MME接收SCEF发送的RAN的拥塞信息之前，还包括：
    所述SCEF接收应用程序发送的业务请求，所述业务请求包括所述UE的位置信息；
    所述SCEF根据所述UE的位置信息确定所述UE所在的RAN列表，所述RAN列表中的RAN为所述SCEF指定的所有RAN；
    所述SCEF向所述RCAF发送拥塞信息订阅请求的消息，所述拥塞信息订阅请求的消息包括所述SCEF指定的所有RAN的标识；
    所述SCEF接收所述RCAF发送的第二RUCI报告。
  8. 根据权利要求1所述的方法，其特征在于，所述网络设备为策略和计费规则功能PCRF，所述网络设备获取RAN的拥塞信息，包括：
    所述PCRF接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第三RUCI报告和UE的标识，所述第三RUCI报告为发生拥塞的RAN的RUCI。
  9. 根据权利要求8所述的方法，其特征在于，所述网络设备根据所述RAN的拥塞信息配置UE的RFSP，包括：
    所述PCRF根据所述第三RUCI报告和所述UE的签约信息，调整所述UE的RFSP。
  10. 根据权利要求8或9所述的方法，其特征在于，所述网络设备向RAN发送与所述RFSP对应的SPID，包括：
    所述PCRF通过服务网关S_GW向MME发送SPID下发消息，所述SPID下发消息用于所述MME根据所述SPID下发消息向RAN发送所述SPID。
  11. 根据权利要求8～10任一项所述的方法，其特征在于，所述PCRF接收RCAF发送的RAN的拥塞信息之前，还包括：
    RCAF接收发生拥塞的RAN发送的拥塞信息报告，所述拥塞信息报告包括发生拥塞的RAN的标识；
    所述RCAF根据所述发生拥塞的RAN的标识向MME发送UE身份请求消息；
    所述RCAF接收所述MME发送的UE身份请求应答消息，所述UE身份请求应答消息包括所述发生拥塞的RAN下的UE的标识。
  12. 一种网络设备，其特征在于，包括收发器和处理器；
    所述收发器，用于获取无线接入网RAN的拥塞信息；
    所述处理器，用于根据所述RAN的拥塞信息配置用户设备UE的频率选择优先级RFSP；
    所述收发器还用于向所述RAN发送与所述RFSP对应的选择优先级识别码SPID，所述SPID用于所述RAN根据所述SPID对所述UE进行接入控制。
  13. 根据权利要求12所述的网络设备，其特征在于，所述网络设备为移动性管理实体MME，所述收发器具体用于：
    接收无线接入网拥塞感知功能RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第一接入网用户面拥塞信息RUCI报告和网络拥塞等级列表，所述第一RUCI报告为所述MME所管理的所有RAN的RUCI。
  14. 根据权利要求13所述的网络设备，其特征在于，所述处理器具体用于：
    根据所述第一RUCI报告和所述网络拥塞等级列表，调整所述UE的RFSP。
  15. 根据权利要求13或14所述的网络设备，其特征在于，所述收发器还用于：
    向所述RCAF发送拥塞信息订阅请求的消息，所述拥塞信息订阅请求的消息包括所述MME所管理的所有RAN的标识；
    接收所述RCAF发送的用于响应所述订阅请求的消息。
  16. 根据权利要求12所述的网络设备，其特征在于，所述网络设备为移动性管理实体MME，所述收发器具体用于：
    接收业务能力开放功能SCEF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第二RUCI报告、所述SCEF指定的所有RAN的标识和UE的标识，所述第二RUCI报告为所述SCEF指定的所有RAN的RUCI。
  17. 根据权利要求16所述的网络设备，其特征在于，所述处理器具体用于：
    根据所述UE的标识从所述第二RUCI报告中选出所述UE所在的RAN的拥塞信息；
    根据所述UE的位置、所述UE所在的RAN的拥塞信息以及所述UE的签约信息调整所述UE的RFSP。
  18. 根据权利要求12所述的网络设备，其特征在于，所述网络设备为策略和计费规则功能PCRF，所述收发器具体用于：
    接收RCAF发送的RAN的拥塞信息，所述RAN的拥塞信息包括第三RUCI报告和UE的标识，所述第三RUCI报告为发生拥塞的RAN的RUCI。
  19. 根据权利要求18所述的网络设备，其特征在于，所述处理器具体用于：
    根据所述第三RUCI报告和所述UE的签约信息，调整所述UE的RFSP。
  20. 根据权利要求18或19所述的网络设备，其特征在于，所述收发器具体用于：
    通过服务网关S_GW向MME发送SPID下发消息，所述SPID下发消息用于所述MME根据所述SPID下发消息向RAN发送所述SPID。
  21. 一种通信系统，其特征在于，包括用户设备UE、无线接入网RAN，以及权利要求12～20任一项所述的网络设备。
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