WO2011124173A2 - Procédé et système de gestion de l'encombrement du réseau - Google Patents

Procédé et système de gestion de l'encombrement du réseau Download PDF

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Publication number
WO2011124173A2
WO2011124173A2 PCT/CN2011/073953 CN2011073953W WO2011124173A2 WO 2011124173 A2 WO2011124173 A2 WO 2011124173A2 CN 2011073953 W CN2011073953 W CN 2011073953W WO 2011124173 A2 WO2011124173 A2 WO 2011124173A2
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WIPO (PCT)
Prior art keywords
terminal
timer
mrt
time value
time
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PCT/CN2011/073953
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English (en)
Chinese (zh)
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WO2011124173A3 (fr
Inventor
郭小龙
国炜
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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 CN201180000547.6A priority Critical patent/CN102884832B/zh
Priority to PCT/CN2011/073953 priority patent/WO2011124173A2/fr
Publication of WO2011124173A2 publication Critical patent/WO2011124173A2/fr
Publication of WO2011124173A3 publication Critical patent/WO2011124173A3/fr

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks

Definitions

  • Embodiments of the present invention relate to the field of wireless communications and, more particularly, to network congestion processing methods and systems. Background technique
  • a core network management entity such as SGSN (Servicing GPRS Support Node), MME (Mobility Management Entity; mobility management entity), assigns each terminal a periodic location update timer.
  • SGSN Server GPRS Support Node
  • MME Mobility Management Entity
  • PTAUT Registered Tracking Area Update Timer
  • the terminal will perform periodic location update according to this timer, that is, when the timer expires, the terminal initiates a location update process.
  • the core network mobility management entity stores a Mobile Reachable Timer (MRT) for each terminal.
  • MRT Mobile Reachable Timer
  • the value of the MRT timer is slightly longer than the periodic location update timer.
  • the network entity If the location update message initiated by the terminal has not been received when the MRT timer expires, the network entity considers that the terminal is not in the network service scope at this time. At the same time, clear the Paging Proceed Flag (PPF) and start a configurable timer. The result of clearing the PPF is that the network entity no longer pages the user.
  • PPF Paging Proceed Flag
  • the network implicitly separates the user.
  • Idle mode Signalling Reduction is activated, if the configurable timer expires, the network will deactivate the ISR operation in addition to implicitly separating the user.
  • MTC Machine Type Communication
  • M2M Machine to Machine
  • M2M Machine to Machine
  • M2M Human to Machine
  • M2M Entity M2M entities
  • a group identifier is an identifier used to identify and identify different groups. For example, in the remote meter reading application of the power industry, we can group all the meters in a certain area into a group. Network operators and power industry users can use this group as a whole for mobility management optimization or access management.
  • the priority of the M2M device relative to the H2H device is lower, which causes the access network entity (such as the RNC, eNB) to preferentially reject the M2M device.
  • Assigning an extended wait time to the device in the reject message ensures that the M2M device will not initiate an access network request for a long time.
  • the access network entity may also reject the request of the normal mobile phone user to initiate access to the network, and indicate a shorter waiting time in the reject message, which ensures that the mobile phone user does not initiate a request to access the network during this time.
  • the core network entity (such as MME) can also inform the access network entity of which access requests are to be denied by the S1 interface.
  • the core network mobility management entity such as SGSN, MME
  • the access network entity such as eNB, RNC
  • the RRC establishes a request, and these types are defined by the overload action in the overload start message. There are currently 5 types defined:
  • the access network entity rejects the request for accessing the network of certain types of UEs according to the establishment reason of the UE (User Equipment; User Equipment) in establishing an RRC (Radio Resource Control) request message, and
  • the reject message carries a wait time value to the UE.
  • the UE belongs to the low priority user, the network will carry a longer extended wait time to the UE in the connection request rejection message. Thus, the UE will not initiate an RRC setup request for any reason until the wait time expires.
  • the reasons for RRC establishment are as follows:
  • the access network entity (such as the eNB, RNC) gives the low priority UE an extended wait time value in the RRC Connection Reject message, which prohibits the UE from sending the registration request, the location update request, and the service request message within the time range. Even if the UE's saved periodic location update timer (PTAUT) expires during this time, it does not allow the location update request message to be sent.
  • the MME of the access network entity does not know the extended wait time value of the UE, so that the periodic location update request sent by the UE is not received before the MRT saved by the MME expires. When the MRT of the MME expires, the MME performs a clear PPF flag and turns on a configurable timer.
  • the MME When the MRT timer expires, if there is downlink data of the UE, the MME will not page the UE, and when the configurable timer expires, the network will implicitly separate the user if the UE is in the active ISR state. Next, the network will also deactivate the ISR. If the UE subsequently accesses the network, the processing flow will be prolonged, resulting in reduced system efficiency. Summary of the invention
  • Embodiments of the present invention provide a network congestion processing method and system, which can improve system efficiency.
  • a network congestion processing method including: performing separation delay control at a start of congestion control for a terminal, where the separation delay control is used to extend a separation operation start time corresponding to the terminal, in the separating operation
  • the terminal is implicitly separated, or the terminal is implicitly separated, and the idle state signaling is used to reduce the ISR operation, wherein the extension time of the separation operation is equal to or greater than the congestion control for the terminal. Cycle.
  • a network congestion processing system including: a learning device for learning start of congestion control for a terminal; and a control device performing separation delay control when the congestion control for the terminal starts, the separation delay control Extending the separation operation start time corresponding to the terminal, performing an implicit separation operation on the terminal when the separation operation start time arrives, or performing an implicit separation operation on the terminal and deactivating the idle state signaling to reduce the ISR operation,
  • the extension value of the startup time of the separation operation is equal to or greater than the period of congestion control for the terminal.
  • the embodiment of the present invention delays the startup time of the separation operation to ensure that the terminal is not implicitly separated and deactivated at least during the congestion control process, thereby improving system efficiency.
  • FIG. 1 is a schematic block diagram showing an example of an architecture of an MTC application to which an embodiment of the present invention is applied.
  • FIG. 2 is a schematic flow chart of a network congestion processing method according to an embodiment of the present invention.
  • FIG. 3A is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • FIG. 3B is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • FIG. 3C is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • FIG. 3D is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • FIG. 3E is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • FIG. 3F is a schematic flow chart of a network congestion processing method according to an embodiment of the present invention.
  • 4 is a schematic flow chart of a network congestion processing procedure in accordance with one embodiment of the present invention.
  • Figure 7A is a schematic block diagram of a core network device in accordance with one embodiment of the present invention.
  • FIG. 7B is a schematic block diagram of a network congestion processing system according to another embodiment of the present invention.
  • Figure 8 is a schematic block diagram of a core network device in accordance with one embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of an access network device in accordance with one embodiment of the present invention. detailed description
  • the technical solution of the present invention can be applied to various communication systems, such as: Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), and general packet radio service. (GPRS, General Packet Radio Service), Long Term Evolution (LTE), etc.
  • a mobile terminal (Mobile Terminal), which may also be called a mobile user (UE, User Equipment), a mobile user equipment, etc., may communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network).
  • the mobile terminal may be a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket, handheld, computer built-in or in-vehicle mobile device, and a wireless access network Exchange language and/or data.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNB or e-NodeB, evolutional Node B) in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved base station
  • e-NodeB evolutional Node B
  • FIG. 1 is a schematic block diagram showing an example of an architecture of an MTC application to which an embodiment of the present invention is applied.
  • the development of the network architecture diagram may be different from the following, and the embodiment of the present invention does not limit this.
  • the architecture of the MTC application mainly includes logical functions such as a mobility management network element, an MTC Server (MTC application server), an access network element, and an HSS (Home Subscriber Server).
  • the mobility management network element is responsible for NAS (Non-Access Stratum; non-access stratum) signaling and NAS signaling encryption, roaming, tracking, etc., and assigns user temporary identity and security functions.
  • An MTC server for storing UE or group related data or information.
  • the HSS mainly stores UE or group related subscription data.
  • the subscription data of the UE refers to the subscription data of each UE as an individual; the subscription data of the group refers to data or subscription data common to each UE in the group.
  • the embodiment of the present invention is directed to the following scenario: when the access network entity rejects the RRC connection request of the UE, and indicates to the UE an extended wait time in the reject message, the waiting time (or called Within the backoff time, the UE does not initiate a request to access the network due to any reason (including a location update request initiated when the periodic location update timer PTAUT on the UE side expires).
  • the core network mobility management entity does not know the waiting time of the access network entity to the UE, which causes the core network entity to perform an implicit separation operation and deactivate the ISR operation after the MRT and the configurable timer expire (the latter only Execute if ISR has been activated). In this way, if the UE subsequently accesses the network, the processing flow will be prolonged and the performance of the network will be degraded.
  • the method in the embodiment of the present invention is suitable for solving the problem in the above case, and ensures that the core network does not implicitly separate and deactivate the ISR operation in advance in the case of such network congestion.
  • 2 is a schematic flow chart of a method for processing network congestion according to an embodiment of the present invention.
  • the extended value of the start time of the separation operation is equal to or greater than the period of congestion control for the terminal.
  • the period of congestion control of the terminal refers to a congestion control start time (for example, when transmitting a congestion control start message for the terminal) to a congestion control end time (for example, sending a congestion control stop message for the terminal) Time).
  • extending the separation operation start time corresponding to the terminal includes: extending a clearing time value of a paging progress flag corresponding to the terminal, and clearing, when the clearing time value arrives, a paging progress flag corresponding to the terminal, And starting the configurable timer, performing an implicit separation operation on the terminal or deactivating the idle state signaling to reduce the ISR operation when the configurable timer expires; wherein, the extended time value is equal to or greater than the terminal The period of congestion control.
  • extending the clearing time value of the paging progress flag corresponding to the terminal may indicate increasing the time value outside the timer, or indicating replacing the time value of the original timer with a longer time value.
  • extending the separation operation start time corresponding to the terminal includes: clearing a paging progress flag corresponding to the terminal but not starting the configurable timer when the clearing time value of the paging progress flag corresponding to the terminal arrives And starting a configurable timer after a predetermined period of time, when the configurable timer expires, performing an implicit separation operation on the terminal or deactivating an idle state signaling to reduce an ISR operation; wherein the clearing time value is predetermined The sum of the durations is equal to or greater than the period of congestion control for the terminal.
  • the embodiment of the present invention delays the startup time of the separation operation to ensure that the terminal is not implicitly separated and deactivated at least during the congestion control process, thereby improving system efficiency.
  • the method of Figure 2 may be performed by a network side system, such as a core network entity (e.g., MME/SGSN) or an access network entity (e.g., an eNB).
  • a network side system such as a core network entity (e.g., MME/SGSN) or an access network entity (e.g., an eNB).
  • Separation delay control refers to the timer control process between the implicit separation of the MRT to the terminal and the possible deactivation of the ISR operation (in the case of activating the ISR), including control of the MRT itself or other timers based on MRT operation. Control of (such as configurable timers and/or additional timers described below).
  • Embodiments of the present invention can perform separation delay control in a variety of ways. One way is to directly change the operational behavior of the core network entity. The other way is to The signaling changes the timer operation on the network side.
  • Figure 3A is a schematic flow diagram of a method of network congestion processing in accordance with one embodiment of the present invention.
  • the method of Figure 3A is primarily performed by a core network device (e.g., the mobility management network element MME or SGSN in Figure 1).
  • a core network device e.g., the mobility management network element MME or SGSN in Figure 1.
  • 201a stopping the MRT when transmitting the congestion control start message overload start for the terminal, and restarting the MRT when transmitting the congestion control stop message overload stop for the terminal.
  • 201a is an embodiment of 201 in FIG.
  • the configurable timer is turned on (for example, may be an existing configurable timer), and the terminal's implicit separation and deactivation of the ISR operation is performed when the configurable timer expires. (The latter is only executed if the ISR has been activated).
  • the implicitly separating or deactivating the ISR operation is later than the congestion control end time (i.e., when the congestion control stop message for the terminal is stopped). In this way, the embodiment of the present invention changes the operation behavior of the core network entity, delays the implicit separation of the terminal, and deactivates the ISR operation, thereby improving system efficiency.
  • FIG. 3B is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • the method of Figure 3B is primarily performed by a core network device (e.g., a mobility management network element MME or SGSN in Figure 1).
  • Figure 3B differs from Figure 3A in that:
  • 201b extending the MRT and/or configurable timer when transmitting a congestion control start message for the terminal, such that the configurable timer expires later than the congestion control end time.
  • the MRT can be extended, the configurable timer can be extended, or both can be extended, and only the configurable timer has an expiration time later than the congestion control end time.
  • the implicit separation and deactivation of the terminal is performed when the configurable timer expires (the latter is only executed if the ISR has been activated).
  • the implicit separation or deactivation of the ISR operation is later than the end of the congestion control.
  • the embodiment of the present invention changes the operation behavior of the core network entity, delays the implicit separation of the terminal, and deactivates the ISR operation (the latter is performed only when the ISR has been activated), thereby improving system efficiency.
  • FIG. 3C is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • the method of Figure 3C is primarily performed by a core network device (e.g., a mobility management network element MME or SGSN in Figure 1).
  • Figure 3C differs from Figure 3A in that:
  • the PPF of the terminal when the MRT expires in the process of network congestion, the PPF of the terminal is not cleared, Enable the configurable timer and enable an additional timer, or turn on the additional timer when sending the congestion control stop message overload stop for the terminal.
  • the additional timer expires, the PPF is cleared and the configurable timer is enabled. The expiration time of the timer is later than the end of the congestion control.
  • the operation is not performed (clearing the PPF and the configurable timer is turned on), but an additional timer is turned on or the additional timer is turned on when the congestion control is stopped, and the additional timer expires.
  • the configurable timer is then turned on so that the configurable timer expires later than the congestion control end time.
  • the implicit separation and deactivation of the terminal is performed when the configurable timer expires (the latter is only executed if the ISR has been activated).
  • the implicit separation or deactivation of the ISR operation is later than the end of the congestion control.
  • the embodiment of the present invention changes the operation behavior of the core network entity, delays the implicit separation of the terminal and deactivates the ISR operation (the latter is performed only when the ISR has been activated), thereby improving system efficiency.
  • the expiration time of the additional timer may be configured/adjusted as needed, as long as the expiration time of the configurable timer is later than the end of the congestion control.
  • FIG. 3D is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • the method of Figure 3D is primarily performed by a core network device (e.g., the mobility management network element MME or SGSN in Figure 1).
  • Figure 3D differs from Figure 3A in that:
  • the PPF when the MRT expires in the process of network congestion, the PPF is cleared, the configurable timer is not enabled, and the additional timer is turned on when the congestion control stop message overload stop for the terminal is sent, and is turned on when the additional timer expires.
  • Configurable timer when the MRT expires in the process of network congestion, the PPF is cleared, the configurable timer is not enabled, and the additional timer is turned on when the congestion control stop message overload stop for the terminal is sent, and is turned on when the additional timer expires.
  • the embodiment of the present invention changes the operation behavior of the core network entity, delays the implicit separation of the terminal and deactivates the ISR operation (the latter is only executed if the ISR has been activated), thereby improving system efficiency.
  • the expiration time of the additional timer can be configured/adjusted as needed.
  • FIG. 3E is a schematic flow chart of a network congestion processing method according to another embodiment of the present invention.
  • the method of FIG. 3E is mainly performed by a core network device (for example, the mobility management network element MME or SGSN in FIG. 1 or the like).
  • Figure 3E differs from Figure 3A in that: 201e.
  • the MRT expires during the network congestion
  • the PPF is cleared and the configurable timer is enabled.
  • the additional timer is started, and the expiration time of the additional timer is later than the end of the congestion control. , implicitly separate or deactivate the ISR operation when the additional timer expires.
  • the embodiment of the present invention changes the operation behavior of the core network entity, delays the implicit separation of the terminal, and improves the system efficiency.
  • the expiration time of the additional timer may be configured/adjusted as needed, as long as the expiration time of the additional timer is guaranteed to be later than the end of the congestion control.
  • the network may be pre-set based on the network configuration, or set a configurable value for each type of UE, or similar to Figure 4 below.
  • the described embodiment delivers these time values via interface messages.
  • the access network entity After receiving the congestion control start message from the core network entity (such as SGSN, MME), the access network entity (such as the RNC, eNB) starts to reject the RRC connection establishment request of a certain type of UE, and the type of the rejected UE is congested. Control is defined in the start message.
  • the core network entity sends a congestion control start message to the access network entity, some operation behaviors of the core network entity are defined to ensure that the core network entity does not implicitly separate and deactivate the user early due to the rejection of the access network entity. Operation (the latter is only performed if the ISR has been activated).
  • the core network entity can perform the operations shown in FIG. 2A to FIG. 2E only for the low priority terminal.
  • the core network entity may perform any operation shown in FIG. 2A to FIG. 2E on the terminal, which is an embodiment of the present invention. There is no limit to this.
  • the embodiment of the present invention can also synchronously extend the corresponding timers at the terminal and the core network device through interface signaling, so as to ensure that the access network entity does not refuse.
  • the core network entity implicitly separates and deactivates the ISR operation (the latter is only executed if the ISR has been activated).
  • FIG. 3F is a schematic flow chart of a network congestion processing method according to an embodiment of the present invention.
  • Figure 3F differs from Figure 3A in that:
  • the extension time of the MRT in 201 f can be described with reference to 201b of Fig. 3B, so that the expiration time of the configurable timer started after the MRT expires is later than the congestion control end time.
  • extension operation of the PTAUT and the extension of the MRT are not limited to extend the PTAUT after extending the MRT, and the extension operation of the PTAUT and the extension operation of the MRT may be performed partially or completely simultaneously. These variations are all within the scope of embodiments of the invention.
  • the time value of the MRT is longer than the time value of the PTAUT.
  • the PTAUT timer at the terminal and the MRT timer at the core network are synchronously extended, and the extended MRT is still longer than the extended PTAUT to ensure that the MRT is longer than the extended PTAUT.
  • the core network entity does not mistake the terminal to be out of the service area because of the rejection of the access network entity, so that the terminal can continue to be paged, thereby improving system efficiency.
  • the "extension" of the timer may indicate that the time value is added to the timer, or that the time value of the original timer is replaced with a longer time value.
  • a first time value T1 (PTAUT+T1) is added to the PTAUT, and a second time value T2 (MRT+T2) is added to the MRT.
  • Tl and T2 can be equal or different, just ensure that the extended MRT is longer than PTAUT.
  • T2 ⁇ T1.
  • T1 and T2 can be equal or different, just ensure that T4>T3.
  • the extended PTAUT is greater than or equal to the waiting time (e.g., T3 or PTAUT + Tl ⁇ wait time) allocated by the access network to the terminal.
  • the waiting time e.g., T3 or PTAUT + Tl ⁇ wait time
  • FIG. 4 is a schematic flow chart of a network congestion processing procedure in accordance with one embodiment of the present invention.
  • the process of FIG. 4 takes the SAE/LTE system as an example, and involves three entities, where the UE represents the terminal, the eNB represents the access network device, and the MME represents the core network device.
  • the embodiment of the present invention is not limited to the specific system/system/entity represented by the name, and may be changed according to different application scenarios.
  • the access network device may be an RNC (Radio Network Controller), a core network.
  • the device can also be an SGSN or the like.
  • ⁇ When congestion occurs in the core network (for example, ⁇ ), ⁇ will send a congestion control start message to the eNB.
  • OVERLOAD START requests the eNB to perform congestion control.
  • the MME defines the behavior action (for which UE access requests are rejected) and a time value T.
  • the time value T of the MRT for the group is increased.
  • the eNB may perform a corresponding RRC connection rejection (RRC CONNECTION REJECT message) to control user access from the access network side, and allocate a waiting time wait time to the user.
  • RRC CONNECTION REJECT message RRC CONNECTION REJECT message
  • the time value T can be delivered to the UE in the RRC Connection Reject message.
  • the eNB may pass the time value T to the corresponding UE in two other manners (message 2 dedicated signaling or message 3 broadcast message).
  • the transfer of the time value T can be either the transfer time value T itself or just the index of the time value T or other indication.
  • the eNB chooses to transmit the time value T by broadcast message, it can be defined in the broadcast message which UE can increase the time value T.
  • the method by which the eNB determines which UEs can be referred to is the embodiment of Figures 2A-2E.
  • FIG. 5 is a schematic flow chart of a network congestion processing procedure according to another embodiment of the present invention.
  • the eNB may prohibit access of a write UE by using an RRC connection reject message (RRC CONNECTION REJECT) or an access control in a system broadcast message.
  • RRC CONNECTION REJECT RRC CONNECTION REJECT
  • a waiting time wait time is defined, which is used to prohibit the UE from initiating network access between the two.
  • the eNB may also define a time value T in the above RRC Connection Reject message.
  • the eNB may additionally pass the time value T to the UE through other system messages or dedicated messages.
  • the waiting time wait time can be taken as the above-mentioned time value T, in which case the process 502 can also be omitted.
  • PTAUT, PTAUT + T ⁇ wait time, for example, a wait time wait time is used as the above time value T.
  • the eNB passes the time value T to the MME through the S1-AP message.
  • the S1-AP message may be an existing message, such as an eNB configuration update, or a new S1-AP message is defined to convey the time value T.
  • the eNB may also carry an action to inform the MME which users to perform the value-added operation on the MRT. Or when only the time value T is carried, the system assumes that only the low priority UE (low priority terminal) is operated.
  • the PTAUT timer at the terminal and the MRT timer at the core network are synchronously extended to ensure that the core network entity does not mistake the terminal to be out of the service area due to the rejection of the access network entity. Therefore, the paging terminal can be continued, and the system efficiency is improved.
  • FIG. 6 is a schematic block diagram of a network congestion processing system in accordance with an embodiment of the present invention.
  • the system 600 of FIG. 6 includes a learned device 601 and a control device 602.
  • the learning device 601 learns that the congestion control for the terminal begins.
  • the learning device 601 can actively learn the start of the congestion control, for example, initiate a congestion control start message overload start for the terminal.
  • the device 601 can passively know the beginning of the congestion control, for example, receiving a congestion control start message overload start or other indication for the terminal.
  • the control device 602 performs separation delay control when the congestion control for the terminal starts, the separation delay control is for extending the separation operation start time corresponding to the terminal, and the terminal is performed when the separation operation start time arrives
  • the implicit separation operation either performs an implicit separation operation on the terminal and deactivates the idle state signaling to reduce the ISR operation.
  • the extended value of the start time of the separation operation is equal to or greater than the period of congestion control for the terminal.
  • the controlling device 602 extends the separation operation startup time corresponding to the terminal, including: extending a clearing time value of the paging progress flag corresponding to the terminal, and clearing the paging corresponding to the terminal when the clearing time value arrives Performing a flag, and starting a configurable timer, performing an implicit separation operation on the terminal or deactivating the idle state signaling to reduce the ISR operation when the configurable timer expires; wherein, the extended time value is equal to or greater than the extended value The period of congestion control for the terminal.
  • extending the clearing time value of the paging progress flag corresponding to the terminal may indicate increasing the time value outside the timer, or indicating replacing the time value of the original timer with a longer time value.
  • control device 602 clears the paging progress flag corresponding to the terminal when the clearing time value of the paging progress flag corresponding to the terminal arrives, but does not start the configurable timer, and starts configurable after a predetermined time period.
  • a timer when the configurable timer expires, performing an implicit separation operation on the terminal or deactivating an idle state signaling to reduce an ISR operation; wherein, the sum of the clearing time value and the predetermined duration is equal to or greater than a terminal The period of congestion control.
  • the embodiment of the present invention delays the startup time of the separation operation to ensure that the terminal is not implicitly separated and deactivated at least during the congestion control process, thereby improving system efficiency.
  • the network congestion processing system in the embodiment of the present invention may be centralized in one entity, such as a core network entity (such as an MME or an SGSN), or may be distributed in different entities on the network side, such as a core network entity and an access network entity (such as e NB ).
  • a core network entity such as an MME or an SGSN
  • an access network entity such as e NB
  • FIG. 7A is a schematic block diagram of a core network device in accordance with one embodiment of the present invention.
  • the core network device 700a of Fig. 7 is an example of the network congestion processing system of Fig. 6, and includes a learning device 701 and a control device 702a.
  • the learning device 701 is an embodiment of the learning device 601, and it is known that the congestion control for the terminal starts.
  • Control device 702a is an example of control device 602 of FIG.
  • the control device 702a activates the mobile reachable timer MRT for the terminal before the congestion control for the terminal starts.
  • the control device 702a may stop the MRT when transmitting a congestion control start message for the terminal, and restart the MRT when transmitting a congestion control stop message for the terminal.
  • control device 702a may extend the MRT and/or the configurable timer when transmitting a congestion control start message for the terminal such that the expiration time of the configurable timer is later than the congestion control end time.
  • control device 702a may not clear the PPF of the terminal, disable the configurable timer, enable an additional timer, or send the terminal for the terminal when the MRT expires during the network congestion.
  • the additional timer is turned on.
  • the PPF is cleared and the configurable timer is turned on, and the expiration time of the configurable timer is later than the end of the congestion control.
  • control device 702a may clear the PPF when the MRT expires in the process of congestion of the network, does not enable the configurable timer, and turns on the attach when sending the congestion control stop message overload stop for the terminal. Timer, when the additional timer expires, the configurable timer is turned on. .
  • control device 702a may clear the PPF and start the configurable timer when the MRT expires during the congestion of the network, and enable the additional timer when the configurable timer expires.
  • the expiration time of the timer is later than the end of the congestion control, and the terminal is implicitly separated or deactivated when the additional timer expires.
  • the embodiment of the present invention changes the operation behavior of the core network entity to ensure that the core network does not implicitly separate or deactivate the ISR operation due to the rejection of the access network entity, thereby improving system efficiency.
  • control means 702a may only control the MRT of the low priority UE.
  • FIG. 7B is a schematic block diagram of a network congestion processing system according to another embodiment of the present invention.
  • the learned device 701 is the same as the learned device 701 of Fig. 6.
  • the control device 702b of Fig. 7B is an example of the control device 602 of Fig. 6, and includes a first extension unit 703 and a second extension unit 704.
  • the first extension unit 703 extends the periodic location update timer PTAUT at the terminal.
  • Second The extension unit 704 extends the mobile reachable timer MRT for the terminal at the core network device, and the extended MRT is longer than the extended PTAUT.
  • the PTAUT timer at the terminal and the MRT timer at the core network are synchronously extended to ensure that the core network does not implicitly separate the user early due to the rejection of the access network entity. Deactivating ISR operations increases system efficiency.
  • the first extension unit 703 and the second extension unit 704 can operate simultaneously or sequentially.
  • the first extension unit 703 and the second extension unit 704 may be concentrated in one control network element or may be distributed on different entities.
  • the "extension" of the timer may indicate that the time value is added to the timer, or that the time value of the original timer is replaced with a longer time value.
  • the first extension unit 703 adds a first time value T1 (PTAUT+T1) to the PTAUT, and the second extension unit 704 adds a second time value T2 (MRT+T2) to the MRT.
  • T1 and T2 can be equal or different, just ensure that the extended MRT is longer than PTAUT.
  • T2 ⁇ T1.
  • PTAUT+T1 replaces the PTAUT
  • T1 and T2 can be equal or different, just ensure that T4>T3.
  • the extended PTAUT is made greater than or equal to the waiting time of the access network allocation wait time (eg, T3 or PTAUT+Tl ⁇ wait time).
  • the first extension unit 703 and the second extension unit 704 may operate only on the low priority UE.
  • the control device 720b can be implemented by a core network device or an access network device.
  • 8 is a schematic block diagram of a core network device in accordance with an embodiment of the present invention.
  • the core network device 800 of FIG. 8 is an example of the control device 702b of FIG. 7B and includes a first extension unit 801 and a second extension unit 802.
  • the core network device 800 of FIG. 8 may perform the operations related to the core network entity (eg, MME) in FIG. 4. Specifically, the second extension unit 802 adds a time value to the MRT for the terminal, such that the MRT is increased in the time value. The expiration time of the configurable timer started after expiration is later than the end of the congestion control. The first extension unit 801 transmits the time value to the terminal through the access network, so that the terminal increases the time value on the PTAUT.
  • 9 is a schematic block diagram of an access network device in accordance with an embodiment of the present invention.
  • the access network device 900 of FIG. 9 is an example of the control device 702b of FIG. 7B and includes a first extension unit 901 and a second extension unit 902.
  • the access network device 900 of FIG. 9 may perform operations related to an access network entity (eg, an eNB) in FIG. 5.
  • the first extension unit 901 is configured to deliver a time value to the terminal, so that the terminal adds the PTAUT. Time value.
  • the second extension unit 902 is configured to pass the time value to the core network device to cause the core network device to increase the time value on the MRT for the terminal.
  • the time value may be a waiting time allocated by the access network to the terminal.
  • the PTAUT timer at the terminal and the MRT timer at the core network are synchronously extended to ensure that the core network entity does not mistake the terminal to be out of the service area due to the rejection of the access network entity. Therefore, the paging terminal can be continued, and the system efficiency is improved.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the 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 electrical, mechanical or otherwise.
  • the unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, may be located in one place. Or it can be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software function unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne des modes de réalisation dans lesquels un procédé et un système de gestion de l'encombrement du réseau sont mis en oeuvre. Le procédé consiste à: exécuter, au moment du démarrage de la gestion de l'encombrement pour un terminal, une commande de retard de séparation utilisée pour différer le temps de démarrage de l'opération de séparation correspondant au terminal; et exécuter une opération de séparation cachée pour le terminal ou exécuter l'opération de séparation cachée et une opération de réduction de signalisation en mode veille (ISR) de désactivation pour le terminal au moment du démarrage de l'opération de séparation, une valeur de retard du moment du démarrage de l'opération de séparation étant égale ou supérieure à une période de gestion de l'encombrement du réseau pour le terminal. Les modes de réalisation de l'invention diffèrent le moment du démarrage de l'opération de séparation de façon à assurer que l'opération de séparation cachée et l'opération ISR de désactivation pour le terminal ne soient pas exécutées au moins pendant le processus de gestion de l'encombrement, ce qui améliore l'efficacité du système.
PCT/CN2011/073953 2011-05-11 2011-05-11 Procédé et système de gestion de l'encombrement du réseau WO2011124173A2 (fr)

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CN201180000547.6A CN102884832B (zh) 2011-05-11 2011-05-11 网络拥塞处理方法和系统
PCT/CN2011/073953 WO2011124173A2 (fr) 2011-05-11 2011-05-11 Procédé et système de gestion de l'encombrement du réseau

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