WO2014000219A1 - 拥塞状态上报方法及接入网设备 - Google Patents

拥塞状态上报方法及接入网设备 Download PDF

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Publication number
WO2014000219A1
WO2014000219A1 PCT/CN2012/077733 CN2012077733W WO2014000219A1 WO 2014000219 A1 WO2014000219 A1 WO 2014000219A1 CN 2012077733 W CN2012077733 W CN 2012077733W WO 2014000219 A1 WO2014000219 A1 WO 2014000219A1
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Prior art keywords
access network
bearer
gateway device
network device
identifier
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PCT/CN2012/077733
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English (en)
French (fr)
Inventor
陆伟
于益俊
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.)
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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 PCT/CN2012/077733 priority Critical patent/WO2014000219A1/zh
Priority to CN201280000885.4A priority patent/CN103650573B/zh
Priority to EP12880201.4A priority patent/EP2869626B1/en
Priority to JP2015518758A priority patent/JP5970723B2/ja
Publication of WO2014000219A1 publication Critical patent/WO2014000219A1/zh
Priority to US14/566,034 priority patent/US9860783B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403—Architecture for metering, charging or billing
    • H04L12/1407—Policy-and-charging control [PCC] architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1485—Tariff-related aspects
    • H04L12/1489—Tariff-related aspects dependent on congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/66—Policy and charging system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/80—Rating or billing plans; Tariff determination aspects
    • H04M15/8016—Rating or billing plans; Tariff determination aspects based on quality of service [QoS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/80—Rating or billing plans; Tariff determination aspects
    • H04M15/8027—Rating or billing plans; Tariff determination aspects based on network load situation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • 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
    • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off

Definitions

  • the present invention relates to the field of communications, and in particular, to a congestion state reporting method and an access network device. Background technique
  • Evolved UMTS Territorial Radio Access Network Evolved UMTS Territorial Radio Access Network (E-UTRAN) system base station (eNodeB, eNB for short), Mobility Management Entity (MME) and Serving Gateway (S-GW) and data
  • E-UTRAN Evolved UMTS Territorial Radio Access Network
  • eNodeB eNodeB
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • PCRF Policy and Charging Rules Function
  • the UE first accesses the core network through the attaching process, and the MME can initiate a data network (Packet Data Network, PDN for short) connection establishment process based on an Access Point Name (APN).
  • PDN Packet Data Network
  • APN Access Point Name
  • the data plane transmission channel is established for the data transmission of the user equipment, that is, the bearer where the data stream of the user equipment is located.
  • each cell the user may access the device due to excessive congestion occurs, e.g., a cell comprising such a large number of user terminals (UE ⁇ UE 2, UE 3 - UE N
  • UE user terminals
  • UE 3 - UE N user terminals
  • each UE uses multiple bearers through the eNB, which in turn easily causes the cell to be congested.
  • the manner in which the gateway device on the core network side knows the congestion state of the cell is only through the following two modes.
  • One mode is: when the cell is congested, the access network device, such as the eNB, sends the mobility management network element (such as the MME or the SGSN). After the congestion notification message is sent, the gateway device or the Policy and Charging Control (PCC) device on the core network can learn to deactivate the part of the bearer or the part of the user to relieve the congestion state.
  • PCC Policy and Charging Control
  • the eNB when the cell is congested, the eNB sends a notification message to the gateway device of the core network through the carried data plane channel, for example, setting a congestion status indication in the uplink packet header of the data plane channel, so that the gateway The device senses the congestion of the cell, and then notifies the core network to modify the Quality of Service (QoS) of the bearer or the application service flow, such as, but not limited to, reducing the maximum bit rate (MBR) and the guaranteed bit rate ( Guaranteed Bit Rate (GBR for short) is used to alleviate the congestion state.
  • QoS Quality of Service
  • MRR maximum bit rate
  • GBR Guaranteed Bit Rate
  • the disadvantage of the above first method is that there is no similar processing in the current 3GPP protocol. If the above process is added, the existing protocol may be greatly affected; the second mode is flawed in each bearer.
  • a congestion status indication is added to the uplink data packet, which causes each gateway device to receive a large number of uplink data packets that are reported to be in a congestion state, further aggravating the congestion state, and may cause a gateway device such as a P-GW.
  • the processing is more complicated, which reduces the processing performance of the gateway device. Summary of the invention
  • the present invention provides a congestion state reporting method and an access network device, which are used to reduce the processing complexity of the gateway device in the prior art when handling cell congestion.
  • the access network device obtains the identifier of the gateway device corresponding to the bearer, and reports the congestion state information of the cell covered by the access network device to the gateway device by using a part of the bearer corresponding to the identifier.
  • An obtaining unit configured to acquire an identifier of a gateway device corresponding to the bearer
  • a sending unit configured to report congestion status information of the cell covered by the access network device to the gateway device by using a part of the bearer corresponding to the identifier.
  • the congestion state reporting method and the access network device in the embodiment of the present invention acquire the identifier of the gateway device on the core network side in advance, and report the access network to the gateway device by using part of the bearer in the bearer corresponding to the identifier.
  • the congestion state information of the cell covered by the device is used to reduce the processing complexity of the gateway device in the prior art when the cell is congested, so that the gateway device can simplify the processing of the cell congestion, and can improve the processing performance of the gateway device. .
  • FIG. 1 is a scenario diagram applied to a congestion state reporting method according to the present invention
  • FIG. 2 is a schematic diagram of user plane data flow of a user terminal according to the present invention.
  • FIG. 3 is a schematic diagram of a PDN connection of a user terminal according to the present invention.
  • FIG. 4 is a schematic flowchart of a method for reporting congestion status according to an embodiment of the present invention
  • FIG. 5A and FIG. 5B are schematic flowcharts of a method for reporting congestion status according to another embodiment of the present invention
  • 6A and 6B are schematic flowcharts of a method for reporting congestion status according to another embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a method for reporting congestion status according to another embodiment of the present invention
  • FIG. 8 is a schematic flowchart of a method for reporting congestion status according to another embodiment of the present invention.
  • the core network of the Long Term Evolution Network mainly includes three logical functions: MME, S-GW, and P-GW;
  • the MME is responsible for non-access-strata (NAS) signaling and NAS signaling encryption, roaming, tracking, etc.; and assigning user temporary identity, security, etc., which corresponds to the current universal mobile communication system.
  • NAS non-access-strata
  • NAS non-access-strata
  • NAS non-access-strata
  • NAS non-access-strata
  • NAS non-access-strata
  • NAS non-access-strata
  • NAS signaling NAS signaling encryption, roaming, tracking, etc.
  • assigning user temporary identity, security, etc. which corresponds to the current universal mobile communication system.
  • UMTS Universal Mobile Telecommunications System
  • SGSN The control plane part of the Serving GPRS Support Node
  • the MME has only the control plane, that is, the data flow of the user plane does not pass through the MME, but in the UMTS Territorial Radio Access Network (UTRAN) system, the SGSN is simultaneously There are control planes and user plane
  • the S-GW in LTE is responsible for the local mobility anchor and the mobility anchor inside the 3GPP system and the function of legally monitoring relevant information;
  • the P-GW in LTE is responsible for policy enforcement and charging and lawful interception related functions, corresponding to the gateway device in the UMTS system, that is, the gateway GPRS support node (Gateway GPRS)
  • GGSN Gateway Node
  • the E-UTRAN in Figure 1 is responsible for radio access layer signaling and user data transmission, corresponding to the access network system UTRAN in the UMTS system.
  • each cell includes multiple UEs, and each UE performs packet data service through an eNB and an MME.
  • the S-GW, the P-GW, and the PCC device establish a user data transmission channel (such as link 2 and link 3 in FIG. 2) through control signaling (such as link 1 in FIG. 2), and then the UE sends The business data is transmitted through the user data transmission channel.
  • the UE accesses the network through the attach process, and in the process of accessing the network, the MME may initiate a PDN connection establishment process (such as assigning an endpoint identifier of the user data transmission channel) based on the APN, thereby establishing a user for data transmission of the UE.
  • the data transmission channel is the bearer used by the UE to transmit the data stream.
  • each PDN connection may include multiple bearers.
  • 10 bearers are established (as shown by the dotted line in FIG. 3).
  • UE 2 to establish a bearer 3 (solid line shown in FIG. 3).
  • the bearer 1, the bearer 2, the bearer 3 of the UE ⁇ 10 bearers belong to one PDN connection, the bearer 4, the bearer 5 belongs to another PDN connection, and the two PDN connections are all connected to the gateway device P-GW ⁇ and the UE ⁇
  • the bearer 6 in the 10 bearers, the bearer 7, the bearer 8 is a PDN connection with the P-GW 2 , and the bearer 9, the bearer 10 establishes a connection with the P-GW 3 .
  • the P-GW 3 establishes a bearer (such as the bearer of UE 2 ).
  • the current congestion status may be reported in the following manner:
  • the eNB needs to set the information indicating the congestion status in the uplink data packet of the UE ⁇ 10 bearers, and is the same as the same one.
  • the uplink data packets in the bearer of the device of the congested cell are all set with the information indicating the congestion status, and each gateway device, such as P-GW ⁇ P-GW 2 and P-GW 3, may receive a large number of reports including congestion status.
  • the uplink user data packet may increase the state of congestion, and may complicate the processing of the gateway device P-GW and reduce the processing performance of the gateway device. Therefore, in the embodiment of the present invention, a method for reporting congestion status is provided, which can solve the problem of the state of increasing congestion in the prior art.
  • the access network device in the following embodiments may be an eNB or a radio network controller (Radio)
  • RNC Radio Network Controller
  • FIG. 4 is a schematic flowchart of a congestion state reporting method according to an embodiment of the present invention. As shown in FIG. 4, the congestion state reporting method in this embodiment is as follows.
  • the access network device such as an eNB or an RNC, obtains an identifier of a gateway device corresponding to the bearer.
  • the access network device in this step can obtain the identifier of the P-GW on the core network side corresponding to the 10 bearers of the UE, the identifier of the P-GW 2 , and the identifier of the P-GW 3 .
  • the access network device may also obtain the identifier of the P-GW corresponding to the bearer of the other UE.
  • the identifier of the corresponding P-GW is obtained, that is, the correspondence between the bearer and the P-GW is learned.
  • the identifier of the gateway device corresponding to the default bearer is obtained.
  • the network element of the core network obtains the identifier of the gateway device corresponding to the dedicated bearer
  • the congestion status information of the cell covered by the access network device is reported to the gateway device by using a part of the bearer corresponding to the identifier of the gateway device.
  • the congestion status information is reported to the gateway device to indicate that the cell is congested.
  • the congestion status information is reported to the gateway device to indicate that the cell is normal rather than congested.
  • Congestion status information of the cell covered by the access network device is reported to the gateway device by using a part of the bearer corresponding to the identifier of the gateway device, that is, the corresponding relationship between the identifier of the gateway device and the bearer is from the bearer corresponding to the identifier. The selected part of the bearer reports the congestion status information of the cell covered by the access network device to the gateway device.
  • all the uplink data packets carried in the part may include the congestion state information, or may be in the part.
  • the congestion data is included in the uplink data packet, which is not limited in this embodiment of the present invention.
  • the congestion state information may be reported to the gateway device by using one of the bearers corresponding to the identifier.
  • the bearer status information may be reported by the bearer 1 in the bearer corresponding to the identifier of the P-GW (which may be any one of the bearer 1 to the bearer 5), and the identifier corresponding to the P-GW 2 is corresponding.
  • the bearer 7 in the bearer (which may also be the bearer 8 or the bearer 6) reports the congestion status information to the P-GW 2
  • the bearer 9 in the bearer corresponding to the identifier of the P-GW 3 (the location may also be the bearer 10)
  • the congestion status information is reported to the P-GW 3 .
  • the carrier 1 may be, the carrier 7, carrier 9, uplink data packet indicates the congested state increases, and thus the gateway device (2, P-GW 3 P -GW ⁇ P-GW) after receiving the uplink data packet
  • the cell in which the current terminal resides may be congested, and then the currently congested cell is de-congested.
  • the selectable portion eNB bearers such as a carrier
  • P-GW 3 reports the congestion state 10 or the like
  • the embodiment does not limit the bearer specifically selected by the access network device.
  • the number of partial bearers in the bearer corresponding to the identifier is not limited, and may be It is actually required to set the congestion state information of the cell covered by the access network device to the gateway device by using one of the bearers corresponding to the identifier of the gateway device.
  • the identifier of the gateway device on the core network side is obtained in advance, and the partial bearer in the bearer corresponding to the identifier is reported to the gateway device.
  • the congestion state information of the cell covered by the network access device is used to reduce the processing complexity of the gateway device in the prior art when the cell is congested, so that the gateway device can simplify the congestion of the cell, and can improve the gateway device. Processing performance.
  • FIG. 5A is a schematic flowchart of a congestion state reporting method according to an embodiment of the present invention. As shown in FIG. 5A, the congestion state reporting method in this embodiment is as follows.
  • the access network device receives the bearer setup response returned by the mobility management network element according to the request sent by the access network device to establish a bearer setup request, and obtains the identifier of the gateway device from the bearer setup response.
  • the access network device such as the eNB, receives the bearer setup response returned by the MME on the core network side according to the bearer setup request sent by the access network device, and the bearer setup response includes the gateway device.
  • the gateway device such as the eNB
  • the access network device selects a part of the bearer to report congestion status information to the gateway device.
  • the lower two terminals UE is camped eNB, UE, such as UE ⁇ 2, the establishment of a bearer service 10, as shown in FIG. 3, the carrier 1, carrier 2, the carrier 3 on the UE ... Bearer 10, etc., and these 10 bearers perform services with external applications through three gateway devices, such as P-GW, P-GW 2 , P-GW
  • the bearers on the UE 2 also perform services with the external application through the three P-GWs.
  • the bearers are indicated by solid black lines in the figure.
  • the P-GW identifier used by each user can be recorded on the eNB.
  • the form to record For example, use the form to record.
  • access network device may select a carrier, the carrier device 6 and a gateway to a bearer 9 notifies its user data packet transfer, such as P-GW ⁇ P-GW 2 , P-GW30 and other UE ⁇ bearer 2, bearer
  • P-GW ⁇ P-GW 2 , P-GW30 and other UE ⁇ bearer 2 bearer
  • the data packets in the 3... are no longer required to include the congestion status indication, that is, the congestion status information is no longer reported; the UE 2 bearer does not need to include the congestion status indication, that is, the congestion status information is no longer reported.
  • the bearer of the UE 2 and the three gateway devices (P-GWs) that transmit user data are included, and the congestion status indication is included, and the congestion status is notified to the network side.
  • P-GWs gateway devices
  • a partial bearer notification of the UE part and the UE 2 is selected to the three gateway devices.
  • the selected bearer 1 and bearer 8 include a congestion status indication in the data packet header, and the P-GW 3 can select the UE 2 bearer to perform the process of notifying the congestion state information.
  • multiple bearers may be selected to notify the three gateway devices.
  • the data packet header of UE ⁇ f and bearer 2 includes a congestion status indication, and the P-GW cell congestion is notified.
  • the congestion state reporting method in this embodiment obtains the identifier of the gateway device on the core network side in the default bearer setup process of the UE, and then the partial bearer in the bearer corresponding to the identifier of the gateway device.
  • the gateway device reports the congestion state information of the cell covered by the access network device, which reduces the processing complexity of the gateway device in the prior art when the cell congestion is processed, so that the gateway device can simplify the process when the cell congestion is processed, and can be better.
  • the processing performance of the gateway device is improved, and the phenomenon of congestion in the prior art is further avoided.
  • FIG. 5B is a schematic flowchart of a congestion state reporting method according to an embodiment of the present invention. As shown in FIG. 5B, the congestion state reporting method in this embodiment is as follows.
  • the UE sends a PDN connection establishment request including the identifier of the UE to the MME on the core network side through the eNB (eNodeB).
  • eNodeB eNodeB
  • the MME sends a create session request to the S-GW according to the PDN connection setup request, where the create session request is used by the S-GW, the P-GW, and the PCRF on the core network side to complete the session process for the UE, and receive the S.
  • the GW creates a session response in response to the creation of a session request sent after the session creation process is completed.
  • the eNB receives a bearer setup response sent by the MME according to the PDN connection setup request, where the bearer setup response includes an identifier of the gateway device, that is, an identifier of the P-GW.
  • the eNB may perform a process of reconfiguring according to the bearer setup response and the UE.
  • the creation of the session request and the bearer setup response include the UE's standard mobile subscriber i, and the International Mobile Subscriber Identification Number (IMSI).
  • the identifier of the P-GW in this embodiment may be: an IP address of the P-GW, or a user plane data channel endpoint identifier (TEID), or a fully Qualified Domain Name (FQDN).
  • TEID user plane data channel endpoint identifier
  • FQDN fully Qualified Domain Name
  • the eNB stores the identifier of the obtained gateway device, and reports the congestion state information of the cell covered by the access network device to the gateway device by using a part of the bearer corresponding to the identifier of the gateway device.
  • part of the bearer corresponding to the identifier of the gateway device is selected to report congestion status information to the gateway device.
  • the identifier of the gateway device corresponding to the bearer is obtained.
  • the access network device located in the target access network receives the identifier of the gateway device corresponding to the bearer sent by the access network device in the source access network. .
  • the access network device located in the target access network receives the identifier of the gateway device corresponding to the bearer sent by the mobility management network element of the target access network. For example, when the MME learns that the eNB corresponding to the UE changes, the MME may directly send the identifier of the gateway device to the current eNB.
  • FIG. 6A is a schematic flowchart of a congestion state reporting method according to an embodiment of the present invention. As shown in FIG. 6A, the congestion state reporting method in this embodiment is as follows.
  • the access network device receives the mobility management network element according to the request sent by the core network side network element, and creates a bearer message sent by the created bearer instruction, and obtains the identifier of the gateway device from the created bearer message.
  • the access network device receives the create bearer message sent by the MME according to the request sent by the core network side network element to create a dedicated bearer.
  • the bearer message contains the identity of the gateway device.
  • the congestion state reporting method in this embodiment can avoid the problem of further aggravating the congestion state in the prior art, and does not need to modify the existing protocol too much, so that the gateway device can quickly handle the problem of cell congestion.
  • FIG. 6B is a schematic flow chart showing a method for reporting congestion status according to an embodiment of the present invention. As shown in FIG. 6B, the congestion state reporting method in this embodiment is as follows.
  • the PCRF on the core network side initiates an IP-CAN session modification request to the P-GW, and then the P-GW sends a request to create a dedicated bearer according to the IP-CAN session modification request to the S-GW.
  • the S-GW sends a dedicated bearer request to the MME, where the MME sends a request for creating a dedicated bearer to the access network device, such as an eNB, where the created dedicated bearer request includes the identifier of the P-GW, and the eNB
  • the access network device such as an eNB
  • the created dedicated bearer request includes the identifier of the P-GW, and the eNB
  • the manner in which the eNB acquires the identifier of the P-GW may be: when the UE is switched from the idle state to the connected state, the identifier of the gateway device corresponding to the bearer of the UE is obtained, for example, the eNB receives the MME sent according to the eNB.
  • the initial context message returned by the service request acquires the identifier of the corresponding P-GW from the initial context message.
  • the eNB may obtain the identifier of the P-GW by receiving the network element (such as the P-GW) on the core network side. Obtaining the label of the gateway device from the downlink data packet by using the established downlink data packet sent by the bearer Knowledge.
  • the downlink data packet includes the identifier of the gateway device.
  • the access network device receives the first downlink data packet sent by the network element on the core network side through the established bearer. At this time, the identifier of the gateway device is obtained from the first downlink data packet, that is, the identifier of the P-GW is included in the first downlink data packet.
  • the above-mentioned congestion state reporting method can avoid the problem of further aggravating the congestion state in the prior art, and does not need to modify the existing protocol too much, so that the gateway device can quickly deal with the problem of cell congestion.
  • FIG. 7 is a schematic flowchart of a congestion state reporting method according to an embodiment of the present invention. As shown in FIG. 7, the congestion state reporting method in this embodiment is as follows.
  • the cell in which the UE is located in the mobile process is switched.
  • the devices accessing the communication network such as the eNB and the MME, change.
  • the network element of the current access network ie, the source element of the source access network, the source eNodeB, the source MME
  • the network element of the source access network sends a handover request message to the source MME, where the handover request message may include but is not limited to the identifier of the P-GW, the identity of the UE, and the target access network. ID of the medium network element.
  • the source MME sends a relocation request to the target MME (the Target MME in the figure) according to the identifier of the network element in the target access network, where the relocation request includes the identifier of the P-GW and the identifier of the UE.
  • the target MME sends a handover request message to the access network device (such as the Target eNB in the figure) in the target access network according to the relocation request, where the handover request message includes the identifier of the P-GW and the identifier of the UE.
  • the access network device such as the Target eNB in the figure
  • the access network device in the target access network such as the eNB, sends a handover indication acknowledgement to the target MME according to the handover request message, and then, after receiving the acknowledgement response message, the current UE is switched from the source access network to the target access. In the net.
  • the access network device in the target access network stores the identifier of the obtained P-GW, and reports, by using the partial bearer in the bearer corresponding to the identifier of the P-GW, the cell covered by the eN B in the target access network. Congestion status information.
  • the above congestion state reporting method can avoid the situation of further aggravating congestion in the prior art.
  • the problem of state at the same time, does not need to modify the existing protocol, so that the gateway device can deal with the problem of cell congestion faster.
  • FIG. 8 is a schematic flowchart of a congestion state reporting method according to an embodiment of the present invention. As shown in FIG. 8, the congestion state reporting method in this embodiment is as follows.
  • the UE transitions to idle state when there is no data transmission and there is no signaling process with the communication network side.
  • the context information of the UE stored in the access network device and the gateway device identification information mentioned in the foregoing embodiment are all cleared.
  • the access network device needs to re-acquire the identifier of the gateway device.
  • the process of transitioning the UE from the idle state to the connected state may be a service request process or a periodic location update process.
  • This embodiment describes the service request process as an example.
  • the access network device such as the eNB, receives the service request sent by the UE, and forwards the service request to the MME.
  • the access network device such as the eNB, receives the initial context message returned by the MME of the core network according to the service request sent by the access network device, for example, the MME, and obtains the identifier of the gateway device corresponding to the bearer from the initial context message.
  • the received message may be updated by the periodic location update, and the MME notifies the access network of the gateway device identifier accessed by the PDN connection of the UE. device.
  • the access network device may select a specific bearer for each gateway device to report the congestion status to the network side through the uplink data packet, thereby avoiding a large number of repeated sending and reporting of the congestion state data packet, and reducing the gateway.
  • the operation of the equipment to achieve the purpose of energy saving and emission reduction.
  • the access network device receives the downlink data packet sent by the network element on the core network side through the established bearer, and any data in the downlink data packet.
  • the packet may include an identifier of the gateway device, and then obtain the identifier of the gateway device from the downlink data packet.
  • the access network device receives the first downlink data packet sent by the network element on the core network side,
  • the first downlink packet contains the identifier of the gateway device.
  • the access network device may select a specific bearer for each gateway device to report congestion state information to the network side through the uplink data packet, thereby avoiding a large number of repeated sending and reporting of the congestion state data packet, and reducing the behavior.
  • the operation of the gateway device to achieve the purpose of energy saving and emission reduction.
  • the detection scheme of the access network device detecting the congestion of the covered cell may be: periodically checking whether the online user of the cell reaches the congestion threshold to determine whether the cell is congested.
  • the manner in which the access network device detects the congestion of the cell is the content in the prior art, and this embodiment is not described in detail herein.
  • the mobility management network element may notify the GGSN of the identity of the gateway device (GGSN) in the RAB assignment process or the activation PDP context reception message in the Packet Data Protocol (PDP) context establishment process.
  • Access network elements such as RNC.
  • RNC Radio Network Controller
  • the present invention further provides an access network device, as shown in FIG. 9, the access network device may perform a process of processing an access network device in the foregoing method embodiment, where the access network
  • the device includes: an obtaining unit 91 and a sending unit 92;
  • the obtaining unit 91 is configured to obtain the identifier of the gateway device corresponding to the bearer device
  • the sending unit 92 is configured to report the congestion state information of the cell covered by the access network device to the gateway device by using a part of the bearer corresponding to the identifier of the gateway device.
  • the obtaining unit 91 is specifically configured to: receive, by the mobility management network element, a bearer setup response returned by the bearer setup request of the bearer according to the request sent by the access network device, and obtain the identifier of the gateway device from the bearer setup response.
  • the obtaining unit 91 is specifically configured to: receive a create bearer message sent by the mobility management network element according to the request sent by the core network side network element to create a bearer, and obtain the gateway device from the create bearer message.
  • logo the name of a create bearer message sent by the mobility management network element according to the request sent by the core network side network element to create a bearer.
  • the sending unit 92 is configured to: when the cell covered by the access network device is congested, report the congestion status message to the gateway device by using one of the bearers corresponding to the identifier, in the third application scenario, the acquiring unit Specifically, in the process of the user equipment switching from the source access network to the target access network, the access network device located in the target access network receives the bearer corresponding to the bearer sent by the access network device in the source access network.
  • the identity of the gateway device is configured to: when the cell covered by the access network device is congested, report the congestion status message to the gateway device by using one of the bearers corresponding to the identifier, in the third application scenario, the acquiring unit Specifically, in the process of the user equipment switching from the source access network to the target access network, the access network device located in the target access network receives the bearer corresponding to the bearer sent by the access network device in the source access network.
  • the identity of the gateway device is configured to: when the cell covered by the access network device is congested, report
  • the access network device located in the target access network receives the identifier of the gateway device corresponding to the bearer sent by the mobility management network element of the target access network.
  • the obtaining unit 91 is specifically configured to: when the user equipment switches from the idle state to the connected state, receive an initial context message returned by the mobility management network element according to the service request sent by the access network device, from the initial context. Obtaining, in the message, an identifier of the gateway device corresponding to the bearer.
  • the obtaining unit 91 is specifically configured to: receive, by the network element on the core network, the identifier of the gateway device by using the downlink data packet sent by the bearer.
  • the obtaining unit 91 is configured to receive, by the network element on the core network side, the identifier of the gateway device from the first downlink data packet by using the first downlink data packet sent by the bearer.
  • the foregoing access network device may select a specific bearer for each gateway device to report the congestion status to the network side through the uplink data packet, thereby avoiding a large number of repeated sending and reporting of the congestion state data packet, and reducing the operation of the gateway device. Thereby achieving the goal of energy saving and emission reduction.
  • the access network device in the embodiment of the present invention may include a processor and a memory, where the processor is configured to acquire an identifier of the gateway device corresponding to the bearer, an identifier of the memory storage gateway device, and an identifier of the storage and the gateway device.
  • Corresponding bearer for example, a corresponding table of the identifier of the storage gateway device and the bearer, etc.
  • the processor reports the congestion status of the cell covered by the access network device to the gateway device by using a part of the bearer corresponding to the identifier of the gateway device information.
  • each functional unit is only an example. In actual applications, the foregoing functions may be considered according to requirements, such as configuration requirements of corresponding hardware or convenience of implementation of software.
  • the allocation is done by different functional units, that is, the internal structure of the access network device is divided into different functional units to complete all or part of the functions described above.
  • the corresponding functional units in this embodiment may be implemented by corresponding hardware, or may be executed by corresponding hardware.
  • the foregoing sending unit may have the function of executing the foregoing sending unit.
  • the hardware such as a transmitter, can also be a general purpose processor or other hardware device capable of executing a corresponding computer program to perform the aforementioned functions.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the above method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明提供一种拥塞状态上报方法及接入网设备，其中，所述方法包括：接入网设备获取承载所对应的网关设备的标识，通过与所述标识对应的承载中的部分承载向所述网关设备上报所述接入网设备覆盖的小区的拥塞状态信息。上述方法能够避免现有技术中进一步加剧拥塞的状态的问题，使得网关设备能够较快处理小区拥塞的问题，可以降低现有技术中的网关设备的处理复杂度。

Description

拥塞状态上报方法及接入网设备 技术领域 本发明实施例涉及通信领域， 尤其涉及一种拥塞状态上报方法及接入 网设备。 背景技术
在当前的长期演进（ Long Term Evolution , 简称 LTE ) 系统中， 用户 设备 ( User Equipment, UE )进行分组交换 ( Packet Switched , 简称 PS ) 业务时， 通过演进的通用移动通信系统陆地无线接入网 （Evolved UMTS Territorial Radio Access Network, 简称 E-UTRAN ) 系统设备的基站 ( eNodeB, 简称 eNB )、 移动性管理网元 ( Mobility Management Entity, 简称 MME ) 以及服务网关（ Serving Gateway, 简称 S-GW )与数据网关 ( Packet Data Network Gateway, 简称 P-GW ) 以及策略与计费规则功 能 ( Policy and Charging Rules Function , 简称 PCRF )设备等通过控制 信令建立起数据面传输通道。
也就是说， U E首先通过附着过程接入核心网， 接入核心网过程中， MME可以基于接入点 （ Access Point Name, 简称 APN )发起数据网 ( Packet Data Network, 简称 PDN ) 连接建立过程， 进而为用户设备的 数据传输建立数据面传输通道， 即用户设备的数据流所在的承载。
然而， 由于无线网络部署的每个小区 （cell ) 的容量有限， 可能会由 于用户设备的过量接入而导致拥塞， 例如， 一小区包括大量用户终端如 ( UE^ UE2、 UE3 - UEN ) , 此时每一 UE通过 eNB使用多个承载， 进 而容易导致该小区拥塞。
当前， 核心网侧的网关设备获知小区拥塞状态的方式仅通过如下的两 种， 一种方式为： 当小区拥塞时， 接入网设备如 eNB向移动性管理网元 (如 MME或者 SGSN)发送拥塞通知消息，进而核心网侧的网关设备或策 略与计费 （ Policy and Charging Control , 简称 PCC )设备获知小区拥塞 之后， 可以发起去激活部分承载或者分离部分用户等緩解拥塞状态的操 作； 另一种方式为： 当小区拥塞时， eNB通过承载的数据面通道， 向核心 网的网关设备发送通知消息， 如在数据面通道的上行数据包报头中设置拥 塞状态指示， 以使网关设备感知小区拥塞， 进而通知核心网发起修改承载 或者应用业务流的服务质量（Quality of Service, 简称 QoS ) , 比如但不 限于降低最大比特率 （ Maximum Bit Rate, 简称 MBR ) 与保证比特率 ( Guaranteed Bit Rate, 简称 GBR ) 等緩解拥塞状态的操作。
然而，上述第一种方式的缺点在于目前的 3GPP协议中没有类似的处 理过程， 若增加上述过程， 可能会对现有的协议造成很大影响； 第二种方 式的缺陷是在每个承载的上行数据包中均增加有拥塞状态指示， 其导致每 个网关设备可能会收到大量的包含有拥塞状态上报的上行数据包， 进一步 加剧拥塞的状态， 而且可能会使网关设备如 P-GW的处理更加复杂， 降低 了网关设备的处理性能。 发明内容
针对现有技术中的缺陷，本发明提供一种拥塞状态上报方法及接入网设 备， 用以降低现有技术中的网关设备在处理小区拥塞时的处理复杂度。
本发明实施例提供的拥塞状态上报方法， 包括：
接入网设备获取承载所对应的网关设备的标识， 通过与所述标识对应 的承载中的部分承载向所述网关设备上报所述接入网设备覆盖的小区的 拥塞状态信息。
本发明实施例提供的接入网设备， 包括：
获取单元， 用于获取承载所对应的网关设备的标识；
发送单元， 用于通过与所述标识对应的承载中的部分承载向所述网关 设备上报所述接入网设备覆盖的小区的拥塞状态信息。
由上述技术方案可知， 本发明实施例的拥塞状态上报方法及接入网设 备， 预先获取核心网侧的网关设备的标识， 进而通过与标识对应的承载中 的部分承载向网关设备上报接入网设备覆盖的小区的拥塞状态信息， 用以 降低现有技术中的网关设备在处理小区拥塞时的处理复杂度， 使得网关设 备处理小区拥塞时能够简化， 且能够较好的提高网关设备的处理性能。 附图说明
为了更清楚地说明本发明的技术方案， 下面将对实施例中所需要使用的 附图作一简单地介绍， 显而易见地： 下面附图只是本发明的一些实施例的附 图， 对于本领域普通技术人员来讲， 在不付出创造性劳动性的前提下， 还可 以根据这些附图获得同样能实现本发明技术方案的其它附图。
图 1为本发明的拥塞状态上报方法所应用的场景图；
图 2为本发明中用户终端的用户面数据流的示意图；
图 3为本发明中用户终端的 PDN连接的示意图；
图 4为本发明一实施例提供的拥塞状态上报方法的流程示意图； 图 5A、图 5B为本发明另一实施例提供的拥塞状态上报方法的流程示意 图；
图 6A、图 6B为本发明另一实施例提供的拥塞状态上报方法的流程示意 图；
图 7为本发明另一实施例提供的拥塞状态上报方法的流程示意图； 图 8为本发明另一实施例提供的拥塞状态上报方法的流程示意图； 图 9为本发明另一实施例提供的接入网设备的结构示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚， 下面将结合本发明实 施例中的附图， 对本发明的技术方案进行清楚、 完整地描述。 显然， 下述 的各个实施例都只是本发明一部分的实施例。 基于本发明下述的各个实施 例， 本领域普通技术人员即使没有作出创造性劳动， 也可以通过等效变换 部分甚至全部的技术特征， 而获得能够解决本发明技术问题， 实现本发明 技术效果的其它实施例， 而这些变换而来的各个实施例显然并不脱离本发 明所公开的范围。
如图 1所示， 目前， 长期演进网络（ LTE ) 的核心网主要包含 MME、 S-GW、 P-GW三个逻辑功能体；
其中， MME负责非接入层（ Non-Access-Stratum , 简称 NAS )信令 和 NAS信令加密以及漫游、 跟踪等； 以及分配用户临时身份标识、 安全 等功能， 其对应于当前通用移动通信系统 （ Universal Mobile Telecommunications System, 简称 UMTS ) 内部服务 GPRS支持节点 ( Serving GPRS Support Node, 简称 SGSN ) 的控制面部分。 应了解的 是， 在 LTE架构中， MME只有控制面， 也就是说用户面的数据流不经过 MME, 而在 UMTS陆地无线接入网 （ UMTS Territorial Radio Access Network, 简称 UTRAN ) 系统中， SGSN同时有控制面， 也有用户面， 也就是说， SGSN既管理信令处理， 也作为用户面通道。
LTE中的 S-GW负责本地的移动性锚点和 3GPP系统内部的移动性 锚点以及合法监听相关信息的功能；
LTE中的 P-GW负责策略执行和计费以及合法监听相关功能，对应于 UMTS系统中的网关设备即网关 GPRS支持节点 （Gateway GPRS
Support Node, 简称 GGSN ) 的功能。
另外， 图 1 中的 E-UTRAN负责无线接入层信令以及用户数据传输， 对应于 UMTS系统中的接入网系统 UTRAN。
图 2示出了为本发明中用户终端的用户面数据流的示意图，如图 2所示， 每个小区（cell )中包括多个 UE, 每一 UE进行分组数据业务时， 通过 eNB、 MME、 S-GW, P-GW以及 PCC设备等通过控制信令（如图 2中的链路一 ) 建立起用户数据传输通道（如图 2中的链路二、 链路三） ， 进而 UE发送的 业务数据通过该用户数据传输通道进行传输。
通常， UE通过附着过程接入网络， 且在接入网络过程中， MME可以 基于该 APN发起 PDN连接建立过程（如分配用户数据传输通道的端点标 识） ， 由此， 为 UE的数据传输建立用户数据传输通道即 UE传输数据流 所使用的承载。
在现有技术中， 每一 UE上可能建立多个 PDN连接， 每个 PDN连接 可以包含有多个承载， 如图 3所示， 建立了 10个承载 （如图 3中的 虚线所示） ， UE2建立了 3个承载 （如图 3中的实线所示） 。
其中， UE^ 10个承载中的承载 1、 承载 2、 承载 3属于一个 PDN 连接， 承载 4、 承载 5属于另一个 PDN连接， 并且两个 PDN连接均连接 于网关设备 P-GW^ 而 UE^ 10个承载中的承载 6、 承载 7、 承载 8是 与 P-GW2建立 PDN连接， 承载 9、 承载 10与 P-GW3建立连接。
当然， 与 同一个 cell的其它终端设备也可能与 P-GW^ P-GW2、 P-GW3建立了承载 （如 UE2的承载） 。
此时， 若 11曰1与 UE2所在 cell拥塞， 目前的拥塞状态上报的方式可能 是： eNB在 UE ^ 10个承载中的上行数据包中均需设置指示拥塞状态的 信息，且与 同属一个拥塞 cell的设备的承载中的上行数据包都设置有 指示拥塞状态的信息， 那么每个网关设备如 P-GW^ P-GW2、 P-GW3可 能会收到大量的包含有拥塞状态上报的上行用户数据包， 这种方式可能会 加剧拥塞的状态， 而且可能会使网关设备 P-GW的处理较为复杂， 降低网 关设备的处理性能。 由此本发明实施例中提供一种拥塞状态上报的方法， 其能够解决现有技术中加剧拥塞的状态的问题。
以下实施例中的接入网设备可为 eNB或者无线网络控制器 （Radio
Network Controller, RNC ) 。
图 4示出了本发明一实施例提供的拥塞状态上报方法的流程示意图， 如图 4所示， 本实施例中的拥塞状态上报方法如下文所述。
401、 接入网设备如 eNB或者 RNC获取承载所对应的网关设备的标 识。
以图 3为例来说， 该步骤中的接入网设备可以获取与 UE 10个承 载所对应的核心网侧的 P-GW 的标识、 P-GW2的标识、 以及 P-GW3的标 识， 当然， 接入网设备也可以获取其他 U E的承载对应的 P-GW的标识。 获取了承载对应的 P-GW的标识， 也就是获知了承载和 P-GW之间的对 应关系。
举例来说， 在用户设备建立缺省承载的过程中， 获取缺省承载所对应 的网关设备的标识；
或者，
在核心网侧网元为用户设备建立专有承载的过程中， 获取专有承载所 对应的网关设备的标识；
或者，
在用户设备从源接入网切换至目标接入网的过程中， 获取用户设备的 承载所对应的网关设备的标识；
或者，
在用户设备从空闲态切换至连接态的过程中， 获取用户设备的承载所 对应的核心网侧的网关设备的标识。
上述步骤 401的获取方式如下述各实施例中的描述。
402、 通过与网关设备的标识对应承载中的部分承载向网关设备上报 该接入网设备所覆盖的小区的拥塞状态信息。
例如， 当接入网设备所覆盖的小区拥塞时， 向网关设备上报拥塞状态 信息以指示该小区拥塞。 当该小区不拥塞时， 向网关设备上报拥塞状态信 息以指示该小区是正常而不是拥塞。 通过与网关设备的标识对应承载中的 部分承载向网关设备上报该接入网设备所覆盖的小区的拥塞状态信息， 也 就是， 根据网关设备的标识和承载的对应关系从该标识对应的承载中选择 出的部分承载向网关设备上报该接入网设备所覆盖的小区的拥塞状态信 息。 通过与网关设备的标识对应承载中的部分承载向网关设备上报该接入 网设备所覆盖的小区的拥塞状态信息时， 可以在该部分承载的全部上行数 据包包含拥塞状态信息， 也可以在部分上行数据包中包含拥塞状态信息， 本发明实施例对此不做限定。
举例来说， 在接入网设备所覆盖的小区拥塞时， 可以通过与标识对应 的承载中的一个承载向网关设备上报拥塞状态信息。
结合图 3来说，可以通过 P-GW 的标识对应的承载中的承载 1 (该处 可以是承载 1至承载 5中的任意一个） 向 上报拥塞状态信息， 通 过 P-GW2的标识对应的承载中的承载 7 (该处还可以是承载 8或承载 6 ) 向 P-GW2上报拥塞状态信息， 通过 P-GW3的标识对应的承载中的承载 9 (该处还可以是承载 10 ) 向 P-GW3上报拥塞状态信息。 例如， 可以在该 承载 1、 承载 7、 承载 9的上行数据包中增加拥塞状态指示， 进而网关设 备（P-GW^ P-GW2、 P-GW3 )在收到上述的上行数据包之后， 可获当前 终端所驻留的小区发生拥塞， 进而对当前拥塞的小区进行解拥塞处理。
在其他实施例中， 该处的 eNB可选择 的部分承载， 如承载 1、 承载 3、 承载 6、 承载 9、 承载 10等向 P-GW^ P-GW2、 P-GW3上报拥 塞状态信息；也可以选择 UE2的部分 /全部承载等分别向网关设备 P-GW^ P-GW2、 P-GW 3上报拥塞状态信息等， 其保证每一网关设备均能够获知 小区拥塞状态信息即可， 本实施例不限定接入网设备具体选择的承载。
本实施例中不限制与标识对应的承载中的部分承载的数量， 可以根据 实际需要设置， 优选地， 可以通过与网关设备的标识对应的承载中的一个 承载向所述网关设备上报接入网设备覆盖的小区的拥塞状态信息。
由上述实施例可知， 本实施例的拥塞状态上"¾方法， 预先获取核心网 侧的网关设备的标识， 进而通过与所述标识对应的承载中的部分承载向所 述网关设备上报所述接入网设备覆盖的小区的拥塞状态信息， 用以降低现 有技术中的网关设备在处理小区拥塞时的处理复杂度， 使得网关设备处理 小区拥塞时能够简化， 且能够较好的提高网关设备的处理性能。
图 5A示出了本发明一实施例提供的拥塞状态上报方法的流程示意 图， 如图 5A所示， 本实施例中的拥塞状态上报方法如下文所述。
501、 接入网设备接收移动性管理网元根据接入网设备发送的请求建 立承载的承载建立请求返回的承载建立响应， 从承载建立响应中获取网关 设备的标识。
举例来说， 在用户设备建立缺省承载的过程中， 接入网设备如 eNB 接收核心网侧的 MME根据接入网设备发送的承载建立请求返回的承载建 立响应， 承载建立响应中包含网关设备的标识。
502、 通过与网关设备的标识对应的承载中的部分承载向网关设备上 报接入网设备覆盖的小区的拥塞状态信息。
优选地， 在与相同的网关设备建立承载的过程中， 接入网设备选择部 分承载向该网关设备上报拥塞状态信息。
结合图 3来说， eNB下有两个终端 UE驻留， 比如 UE^ UE2, UE 上建立了 10个承载进行业务， 如图 3中所示， 承载 1 , 承载 2, 承载 3.... 承载 10等， 而且这 10个承载通过三个网关设备与外部应用执行业务， 比 如 P-GW , P-GW2, P-GW
同样地， UE2上的承载也通过该三个 P-GW与外部应用执行业务， 为 简便， 图中以实黑线表示承载。
如此， eNB上可以记录各个用户 载所使用的 P-GW标识。 例如， 釆用表格进行记录。
那么， 当该 11巳1与 UE2驻留的 eNB的小区发生拥塞时， 接入网设备 可以选择 的承载 1，承载 6以及承载 9通知到与其传输用户面数据包 的网关设备如 P-GW^ P-GW2, P-GW30 而其它的 UE^ 承载 2, 承载 3...中的数据包不再需要包含有拥塞状态指示， 即不再继续上报拥塞状态 信息； UE2的承载也不再需要包含有拥塞状态指示， 即不再继续上报拥塞 状态信息。
或者， 选取 UE2的与该三个网关设备（P-GW )传输用户数据的承载 (如图 3中的黑实线所示的承载） 中包含有拥塞状态指示， 向网络侧通知 拥塞状态。
或者，选择 UE 部分与 UE2的部分承载通知到这三个网关设备。 比 如选取 的承载 1和承载 8, 在其数据包头中包含有拥塞状态指示， 而 P-GW3则可以选取 U E2的承载执行通知拥塞状态信息的过程。
或者， 也可以选取多个承载通知该三个网关设备。 比如选择 UE^ f 载 1和承载 2的数据包头中包含有拥塞状态指示， 通知 P-GW 小区拥塞 等。
上述列举的方式只是示意， 本发明实施例不限制具体执行方法， 只要 能够通知到网关设备即可以。
由上述实施例可知， 本实施例的拥塞状态上报方法， 通过在 UE的缺 省承载建立过程中获取核心网侧的网关设备的标识， 进而通过与网关设备 的标识对应的承载中的部分承载向网关设备上报所述接入网设备覆盖的 小区的拥塞状态信息， 降低了现有技术中的网关设备在处理小区拥塞时的 处理复杂度， 使得网关设备处理小区拥塞时能够简化， 且能够较好的提高 网关设备的处理性能， 进一步能够避免现有技术中拥塞加剧的现象。
图 5B示出了本发明一实施例提供的拥塞状态上报方法的流程示意 图， 如图 5B所示， 本实施例中的拥塞状态上报方法如下文所述。
51 1、 UE通过 eNB ( eNodeB ) 向核心网侧的 MME发送包括 UE的 标识的 PDN连接建立请求。
512、 MME根据 PDN连接建立请求向 S-GW发送创建会话请求， 所 述创建会话请求被核心网侧的 S-GW、 P-GW, PCRF用于交互完成创建 针对 UE的会话过程， 并接收 S-GW在创建会话过程完成之后发送的创建 会话请求的响应即创建会话响应。
513、 eNB接收 MME根据 PDN连接建立请求发送的承载建立响应， 所述承载建立响应中包含网关设备的标识 （即 P-GW的标识） 。 当然， eNB可根据承载建立响应和 UE实现重配置的过程。 需要说明的是， 在实际应用中创建会话请求、 承载建立响应中均包括 有 UE的标 f" 口国际移动用户 i只另' J码 ( International Mobile Subscriber Identification Number, 简称 IMSI ) 等。
另外， 本实施例中的 P-GW的标识可为： P-GW的 IP地址、 或者是 用户面数据通道端点标识（ TEID )、或者全称域名（ Fully Qualified Domain Name, 简称 FQDN )等。 当然， 也可以是上述所列举的各种标识的组合。
514、 eNB存储上述获取的网关设备的标识， 进而通过与网关设备的 标识对应的承载中的部分承载向网关设备上报所述接入网设备覆盖的小 区的拥塞状态信息。
也就是说， 针对相同的标识的网关设备， 选择与网关设备的标识对应 的承载中的部分承载向网关设备上报拥塞状态信息。
需要说明的是， 本实施例中的前述步骤 51 1、 步骤 512与现有的创建 会话过程的步骤是一致的， 本实施例仅为示意性的说明。
进一步地， 在 UE从源接入网切换至目标接入网的过程中， 获取承载 所对应的网关设备的标识。 例如， 在 UE从源接入网切换至目标接入网的 过程中， 位于目标接入网中的接入网设备接收源接入网中的接入网设备发 送的承载对应的网关设备的标识。 也就是说， 在 UE从源接入网切换至另 一目标接入网的过程中， 若与 UE连接的接入网设备发生变换， 但是核心 网侧的 MME并未变化， 此时， 若两个接入网设备之间建立有传输数据的 接口， 则 U E所连接的目标接入网侧的接入网设备接收源接入网中的接入 网设备通过上述传输数据的接口发送的网关设备的标识，
或者，
在 UE从源接入网切换至目标接入网的过程中， 位于目标接入网中的 接入网设备接收位于目标接入网的移动性管理网元发送的承载对应的网 关设备的标识。 例如， MME获知 UE所对应的 eNB发生变化时， 可直接 将网关设备的标识发送至当前 eNB。
由上述实施例可知， 本实施例的拥塞状态上报方法， 能够避免现有技 术中进一步加剧拥塞的状态的问题， 同时无需对现有的协议做过多的修 改， 使得网关设备能够较快处理小区拥塞的问题。 图 6A示出了本发明一实施例提供的拥塞状态上报方法的流程示意 图， 如图 6A所示， 本实施例中的拥塞状态上报方法如下文所述。
601、 接入网设备接收移动性管理网元根据核心网侧网元发送的请求 创建承载的创建承载指令发送的创建承载消息， 从创建承载消息中获取网 关设备的标识。
举例来说， 在核心网侧网元为 U E建立专有承载的过程中， 接入网设 备接收 MME根据核心网侧网元发送的请求创建专有承载的创建承载指令 发送的创建承载消息， 创建承载消息中包含网关设备的标识。
602、 通过与网关设备的标识对应的承载中的部分承载向网关设备上 报所述接入网设备覆盖的小区的拥塞状态信息。
本实施例的拥塞状态上报方法， 能够避免现有技术中进一步加剧拥塞 的状态的问题， 同时无需对现有的协议做过多的修改， 使得网关设备能够 较快处理小区拥塞的问题。
图 6B示出了本发明一实施例提供的拥塞状态上报方法的流程示意 图， 如图 6B所示， 本实施例中的拥塞状态上报方法如下文所述。
61 1、 核心网侧的 PCRF向 P-GW发起 IP-CAN会话修改请求， 进而 P-GW根据 IP-CAN会话修改请求向 S-GW发送创建专有承载请求。
612、 S-GW将创建专有承载请求发送至 MME, 所述 MME向接入网 设备如 eNB发送创建专有承载请求， 该创建专有承载请求中包含 P-GW 的标识， eNB根据创建专有承载请求实现和 UE的重配置过程。
613、 根据获取的网关设备的标识， 通过与网关设备的标识对应的承 载中的部分承载向网关设备上报 eNB覆盖的小区的拥塞状态信息。
在其他实施例中， eNB获取 P-GW的标识的方式还可以是： 在 UE从 空闲态切换至连接态时， 获取 UE的承载所对应的网关设备的标识， 例如 eNB接收 MME根据 eNB发送的服务请求返回的初始上下文消息， 从初 始上下文消息中获取承载对应的 P-GW的标识。
在另一实施例中， 若用户设备的专有承载、 缺省承载均建立成功， 此 时， eNB获取 P-GW的标识的方式可为：接收核心网侧的网元（如 P-GW ) 通过建立的承载发送的下行数据包， 从下行数据包中获取网关设备的标 识。 在本实施例中， 下行数据包中包含有网关设备的标识， 优选地， 上述 接入网设备接收核心网侧的网元通过建立的承载发送的第一个下行数据 包。 此时， 从第一个下行数据包中获取网关设备的标识， 即第一个下行数 据包中包含有 P-GW的标识。
上述的拥塞状态上报方法， 能够避免现有技术中进一步加剧拥塞的状 态的问题， 同时无需对现有的协议做过多的修改， 使得网关设备能够较快 处理小区拥塞的问题。
图 7示出了本发明一实施例提供的拥塞状态上报方法的流程示意图， 如图 7所示， 本实施例中的拥塞状态上报方法如下文所述。
本实施例中 UE在移动过程中所在的小区发生切换， 此时， UE若从 源接入网切换至目标接入网中 , 此时 UE接入通信网络的设备如 eNB、 MME均发生变化。
701、 在 UE移动过程中， 如果当前接入网的网元 （即源接入网的网 元， 口 Source eNodeB、 Source MME ) 不 *¾月良务该 UE, ^^么 于该 UE 发起向目标接入网的网元的切换过程，源接入网的网元向 Source MME发 送切换需求消息， 该切换需求消息中可以包括但不限于 P-GW的标识、 U E的标识、 目标接入网中网元的标识。
702、 Source MME根据目标接入网中网元的标识向目标 MME (如图 中的 Target MME )发送重定位请求，该重定位请求中包括 P-GW的标识、 UE的标识。
703、 目标 MME根据重定位请求向目标接入网中的接入网设备 (如 图中的 Target eNB )发送切换请求消息， 该切换请求消息中包括 P-GW 的标识、 UE的标识。
相应地， 目标接入网中的接入网设备如 eNB根据切换请求消息向目 标 MME发送切换指示确认，进而在收到确认响应消息后， 实现将当前 UE 从源接入网切换至目标接入网中。
704、 目标接入网中接入网设备存储获取的 P-GW的标识， 通过与 P-GW的标识对应的承载中的部分承载向 P-GW上报目标接入网中的 eN B 覆盖的小区的拥塞状态信息。
上述的拥塞状态上报方法， 能够避免现有技术中进一步加剧拥塞的状 态的问题， 同时无需修改现有的协议， 使得网关设备能够较快处理小区拥 塞的问题。
图 8示出了本发明一实施例提供的拥塞状态上报方法的流程示意图， 如图 8所示， 本实施例中的拥塞状态上报方法如下文所述。
通常， UE在无数据传输， 并且在与通信网侧无信令过程时， 转为空 闲态。
当 UE转入空闲态时， 接入网设备中保存的 UE的上下文信息以及前 述实施例提到的网关设备标识信息全部清除。 此时， 在 UE由空闲态转为 连接态时， 接入网设备还需重新获取网关设备的标识。
在实际应用中， UE由空闲态转为连接态的过程可能是服务请求过程， 也可能是周期性位置更新过程。 本实施例以服务请求过程为例描述。
801、 在 UE从空闲态切换至连接态时， 接入网设备如 eNB接收 UE 发送的服务请求， 以及将该服务请求转发至 MME。
802、 接入网设备如 eNB接收所述核心网侧的 MME根据接入网设备 如 eNB发送的服务请求返回的初始上下文消息， 从初始上下文消息中获 取承载对应的网关设备的标识。
803、 通过与网关设备的标识对应的承载中的部分承载向网关设备上 报接入网设备覆盖的小区的拥塞状态信息。
需要说明的是， 如果通过 UE由空闲态转入连接态时的周期性位置更 新过程， 则可以通过周期性位置更新接收消息， MME将 UE的 PDN连接 所接入的网关设备标识通知接入网设备。
上述的拥塞状态上报方法， 接入网设备可以针对每一个网关设备选择 特定的承载通过上行数据包向网络侧上报拥塞状态， 这样避免了大量的重 复发送上报拥塞状态数据包的行为， 减少了网关设备的操作， 从而达到节 能减排的目的。
在另一实施例中， 还可能出现的是： 在 UE的承载建立成功之后， 接 入网设备接收核心网侧的网元通过建立的承载发送的下行数据包， 下行数 据包中的任一数据包可包含网关设备的标识， 进而从下行数据包中获取网 关设备的标识。
具体地， 接入网设备接收核心网侧的网元发送的第一个下行数据包， 第一个下行数据包中包含有网关设备的标识 ,
^口下表一例举说
表一：
Figure imgf000014_0001
上述的拥塞状态上报方法， 接入网设备可以针对每一个网关设备选择 特定的承载通过上行数据包向网络侧上报拥塞状态信息， 这样避免了大量 的重复发送上报拥塞状态数据包的行为， 减少了网关设备的操作， 从而达 到节能减排的目的。
另一方面， 针对可能存在的只有下行用户面数据包大量传输， 而没有 上行数据包的终端， 也能够及时处理， 提高了网关设备的处理性能。
此外， 需要说明的是， 接入网设备检测所覆盖的小区拥塞的检测方案 可为， 通过周期性的查看该小区的在线用户是否达到拥塞门限值， 以确定 小区是否拥塞。 特别地， 接入网设备检测小区拥塞的方式为现有技术中的 内容， 本实施例不在此详述。
上述任一实施例以系统架构演进 ( System Architechure Evolution , 简称 SAE ) 架构为例描述， 该技术也同样适用于 UMTS架构中， 举例来 说， 对于图 5A、 图 5B与图 6A、 图 6B所示的流程图中， 移动性管理网 元为 GGSN可以在分组数据协议（ Packet Data Protocol , 简称 PDP )上 下文建立过程中的 RAB指派过程或者激活 PDP上下文接收消息中，将网 关设备（GGSN ) 的标识通知接入网元（如 RNC ) 。 当然， 该系统架构下 任一实施例中 GGSN标识的具体表现形式可为多种。
根据本发明的另一方面，本发明还提供一种接入网设备，如图 9所示， 该接入网设备可以执行前述方法实施例中的接入网设备的处理过程， 该接 入网设备包括： 获取单元 91和发送单元 92; 其中， 获取单元 91用于获取承载所对应的网关设备的标识； 发送单 元 92用于通过与网关设备的标识对应的承载中的部分承载向网关设备上 报接入网设备覆盖的小区的拥塞状态信息。
优选地， 获取单元 91具体用于： 接收移动性管理网元根据接入网设 备发送的请求建立承载的承载建立请求返回的承载建立响应， 从承载建立 响应中获取所述网关设备的标识。
在另一场景中， 获取单元 91具体用于： 接收移动性管理网元根据核 心网侧网元发送的请求创建承载的创建承载指令发送的创建承载消息， 从 创建承载消息中获取所述网关设备的标识。
上述的发送单元 92具体用于在接入网设备所覆盖的小区拥塞时， 通 过与所述标识对应的承载中的一个承载向所述网关设备上报拥塞状态信 在第三应用场景中， 获取单元 91具体用于， 在用户设备从源接入网 切换至目标接入网的过程中， 位于目标接入网络中的接入网设备接收源接 入网中的接入网设备发送的承载对应的网关设备的标识；
或者，
在用户设备从源接入网切换至目标接入网的过程中， 位于目标接入网 络的接入网设备接收位于目标接入网的移动性管理网元发送的承载对应 的网关设备的标识。
在第四应用场景中， 获取单元 91具体用于， 在用户设备从空闲态切 换到连接态时， 接收移动性管理网元根据接入网设备发送的服务请求返回 的初始上下文消息， 从初始上下文消息中获取所述承载对应的所述网关设 备的标识。
在第五种应用场景中， 获取单元 91具体用于， 接收核心网侧的网元 通过所述承载发送的下行数据包， 从所述下行数据包中获取所述网关设备 的标识。 优选地， 获取单元 91具体用于接收核心网侧的网元通过承载发 送的第一个下行数据包， 从第一个下行数据包中获取网关设备的标识。
上述的接入网设备， 可以针对每一个网关设备选择特定的承载通过上 行数据包向网络侧上报拥塞状态， 这样避免了大量的重复发送上报拥塞状 态数据包的行为， 减少了网关设备的操作， 从而达到节能减排的目的。 在实际应用中， 本发明实施例中的接入网设备可以包括处理器和存储 器， 其中处理器用于获取承载所对应的网关设备的标识， 存储器存储网关 设备的标识， 以及存储与网关设备的标识对应的承载（例如存储网关设备 的标识与承载的对应表格等） ， 进而处理器通过与网关设备的标识对应的 承载中的部分承载向网关设备上报所述接入网设备覆盖的小区的拥塞状 态信息。
需要说明的是， 以上接入网设备的实施例中， 各功能单元的划分仅是 举例说明， 实际应用中可以根据需要， 例如相应硬件的配置要求或者软件 的实现的便利考虑， 而将上述功能分配由不同的功能单元完成， 即将接入 网设备的内部结构划分成不同的功能单元， 以完成以上描述的全部或者部 分功能。 而且， 实际应用中， 本实施例中的相应的功能单元可以是由相应 的硬件实现， 也可以由相应的硬件执行相应的软件完成， 例如， 前述的发 送单元， 可以是具有执行前述发送单元功能的硬件， 例如发射器， 也可以 是能够执行相应计算机程序从而完成前述功能的一般处理器或者其他硬 件设备。
本领域普通技术人员可以理解： 实现上述各方法实施例的全部或部分 步骤可以通过程序指令相关的硬件来完成。 前述的程序可以存储于一计算 机可读取存储介质中。 该程序在执行时， 执行包括上述各方法实施例的步 骤； 而前述的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存 储程序代码的介质。
最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非 对其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的 普通技术人员应当理解： 其依然可以对前述各实施例所记载的技术方案进 行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或 者替换， 并不使相应技术方案的本质脱离本发明各实施例技术方案的范 围。

Claims

权 利 要 求 书
1、 一种拥塞状态上报方法， 其特征在于， 包括： 接入网设备获取承 载所对应的网关设备的标识， 通过与所述标识对应的承载中的部分承载向 所述网关设备上报所述接入网设备覆盖的小区的拥塞状态信息。
2、 根据权利要求 1所述的方法， 其特征在于， 所述通过与所述标识 对应的承载中的部分承载向所述网关设备上报所述接入网设备覆盖的 d、 区的拥塞状态信息， 包括：
通过与所述标识对应的承载中的一个承载向所述网关设备上报所述 接入网设备覆盖的小区的拥塞状态信息。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述接入网设备 获取承载所对应的网关设备的标识， 包括：
所述接入网设备接收移动性管理网元根据所述接入网设备发送的请 求建立所述承载的承载建立请求返回的承载建立响应， 从所述承载建立响 应中获取所述网关设备的标识。
4、 根据权利要求 1或 2所述的方法， 其特征在于， 所述接入网设备 获取承载所对应的网关设备的标识， 包括：
所述接入网设备接收移动性管理网元根据核心网侧网元发送的请求 创建所述承载的创建承载指令发送的创建承载消息， 从所述创建承载消息 中获取所述网关设备的标识。
5、 根据权利要求 1或 2所述的方法， 其特征在于， 所述接入网设备 获取承载所对应的网关设备的标识， 包括：
在用户设备从源接入网切换至目标接入网的过程中， 位于所述目标接 入网中的所述接入网设备接收所述源接入网中的接入网设备发送的所述 承载对应的所述网关设备的标识；
或者，
在用户设备从源接入网切换至目标接入网的过程中， 位于所述目标接 入网中的所述接入网设备接收位于所述目标接入网的移动性管理网元发 送的所述承载对应的所述网关设备的标识。
6、 根据权利要求 1或 2所述的方法， 其特征在于， 所述接入网设备 获取承载所对应的网关设备的标识， 包括：
所述接入网设备接收移动性管理网元根据所述接入网设备发送的服 务请求返回的初始上下文消息， 从所述初始上下文消息中获取所述承载对 应的所述网关设备的标识。
7、 根据权利要求 1或 2所述的方法， 其特征在于， 所述接入网设备 获取承载所对应的网关设备的标识， 包括：
所述接入网设备接收核心网侧的网元通过所述承载发送的下行数据
8、 根据权利要求 1或 2所述的方法， 其特征在于， 所述下行数据包 为所述核心网侧的网元发送的第一个下行数据包。
9、 一种接入网设备， 其特征在于， 包括：
获取单元， 用于获取承载所对应的网关设备的标识；
发送单元， 用于通过与所述标识对应的承载中的部分承载向所述网关 设备上报所述接入网设备覆盖的小区的拥塞状态信息。
10、 根据权利要求 9所述的接入网设备， 其特征在于， 所述获取单元 具体用于
接收移动性管理网元根据所述接入网设备发送的请求建立所述承载 的承载建立请求返回的承载建立响应， 从所述承载建立响应中获取所述网 关设备的标识。
1 1、根据权利要求 9所述的接入网设备，其特征在于，所述获取单元， 具体用于
接收移动性管理网元根据核心网侧网元发送的请求创建所述承载的 创建承载指令发送的创建承载消息， 从所述创建承载消息中获取所述网关 设备的标识。
12、根据权利要求 9所述的接入网设备，其特征在于，所述获取单元， 具体用于
在用户设备从源接入网切换至目标接入网的过程中， 位于所述目标接 入网络中的所述接入网设备接收所述源接入网中的接入网设备发送的所 述承载对应的所述网关设备的标识；
或者， 在用户设备从源接入网切换至目标接入网的过程中， 位于所述目标接 入网络的所述接入网设备接收位于所述目标接入网的移动性管理网元发 送的所述承载对应的所述网关设备的标识。
13、根据权利要求 9所述的接入网设备，其特征在于，所述获取单元， 具体用于
在用户设备从空闲态切换至连接态时， 接收移动性管理网元根据所述 接入网设备发送的服务请求返回的初始上下文消息， 从所述初始上下文消 息中获取所述承载对应的所述网关设备的标识。
14、根据权利要求 9所述的接入网设备，其特征在于，所述获取单元， 具体用于
接收核心网侧的网元通过所述承载发送的下行数据包， 从所述下行数 据包中获取所述网关设备的标识。
15、 根据权利要求 14所述的接入网设备， 其特征在于， 所述获取单 元具体用于
接收所述核心网侧的网元通过所述承载发送的第一个下行数据包， 从 所述第一个下行数据包中获取所述网关设备的标识。
16、 根据权利要求 9至 15任一所述的接入网设备， 其特征在于， 所 述发送单元， 具体用于
在所述接入网设备所覆盖的小区拥塞时， 通过与所述标识对应的承载 中的一个承载向所述网关设备上报拥塞状态信息。
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