WO2011160308A1 - Method for processing network congestion, network device and network system - Google Patents

Abstract

The present invention discloses a method for processing network congestion, a network device and a network system. The present method comprises: an access network device receives an indication message including an access control mode sent by a mobility management network element, wherein said indication message is sent after the mobility management network element acquires network congestion; the access network device rejects or delays the access of the terminal according to said indication message. The present invention can relieve the network congestion state and avoid the further deterioration of the network congestion.

Description

 Network congestion processing method, network device and network system

Technical field

 The present invention relates to mobile communication technologies, and in particular, to a network congestion processing method, a network device, and a network system. Background technique

 Smart Phone In addition to all the features of a normal terminal, an operating system is installed to install more applications. Intelligent terminals have the following characteristics: Always online, register to voice and data networks at the same time, synchronize data frequently with the network side, have a heartbeat mechanism, and constantly try to register to a third-generation (3G) network. Based on the above characteristics, the amount of signaling between the intelligent terminal and the network will increase greatly during use, which may cause network congestion.

 In the existing network architecture, even if the network side is overloaded, the network side will try to receive any terminal access request and provide services for the terminal. After the 3G network fails for a certain number of attempts, the intelligent terminal selects the second-generation (2G) network. If the 2G network is successfully attached, if the 3G network is found, the intelligent terminal will try the 3G network again, causing a large amount of signaling overhead. And may cause the network to crash. In addition, in the case of a network-side device restart, the current smart terminal initiates a large number of procedures for re-establishing a Packet Data Protocol (PDP) context, resulting in an instantaneous traffic overload on the network side. In addition, not only smart terminals, but also other types of terminals may cause network congestion. In the process of implementing the present invention, there is a lack of a suitable solution for mitigating network congestion in the prior art. Summary of the invention

 The embodiments of the present invention provide a network congestion processing method, a network device, and a network system, which are used to alleviate network congestion and avoid further deterioration of network congestion.

An embodiment of the present invention provides a network congestion processing method, including: The access network device receives an indication message that is sent by the mobility management network element and includes an access control mode, where the indication message is sent by the mobility management network element after the network congestion is learned;

 The access network device rejects or delays access of the terminal according to the indication message.

 The embodiment of the invention further provides a network congestion processing method, including:

 The access network device learns that the network is congested;

 The access network device restricts terminal access according to the priority in the temporary identifier of the terminal.

 The embodiment of the invention provides a network device, including:

 a receiving module, configured to receive, by the mobility management network element, an indication message that includes an access control mode, where the indication message is sent by the mobility management network element after the network congestion is learned;

 And a processing module, configured to reject or delay access of the terminal according to the indication message.

 An embodiment of the present invention further provides a network device, including:

 The learning module is configured to access the network device to learn network congestion;

 The restriction module is configured to limit the terminal access according to the priority in the temporary identifier of the terminal.

 The embodiment of the invention provides a network system, including:

 a mobility management network element, configured to learn network congestion, and send an indication message after the network is congested, where the indication message includes an access control mode;

 The access network device is configured to reject or delay access of the terminal according to the indication message.

It can be seen from the above technical solution that the embodiment of the present invention can alleviate the network congestion condition and avoid further deterioration of congestion by rejecting or delaying the access of the terminal after network congestion occurs. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set forth in the description of the claims Other drawings may also be obtained from these drawings without the inventive labor. 1 is a schematic flow chart of a method according to a first embodiment of the present invention;

 2 is a schematic flow chart of a method according to a second embodiment of the present invention;

 3 is a schematic flow chart of a method according to a third embodiment of the present invention;

 4 is a schematic flow chart of a method according to a fourth embodiment of the present invention;

 FIG. 5 is a schematic flowchart of a method according to a fifth embodiment of the present invention; FIG.

 6 is a schematic structural diagram of a device according to a sixth embodiment of the present invention;

 7 is a schematic structural diagram of a device according to a seventh embodiment of the present invention;

 FIG. 8 is a schematic structural diagram of a system according to an eighth embodiment of the present invention. detailed description

 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 FIG. 1 is a schematic flowchart of a method according to a first embodiment of the present invention, including:

 Step 11: The access network device receives an indication message that is sent by the mobility management network element and includes an access control mode, where the indication message is sent by the mobility management network element after the network congestion is learned;

The mobility management network element may be a mobility management network element that may be a Packet Switched (PS) domain, for example, a General Packet Radio Service (GPRS) support node (Serving GPRS) Support Node (SGSN) or Mobile Management Entity (MME); it can also be a Mobile Switch Center (MSC) in the Circuit Switched (CS) domain. The access network device may be a Base Station Controller (BSC), a Radio Network Controller (RNC), or an evolved base station (eNodeB). Of course, the names of the core network device and the access network device need to be corresponding according to different network systems. The access control method includes restricting access by International Mobile Subscriber Identity (IMSI), or restricting priority access, or restricting terminal type access, or allowing terminal access requesting priority service.

 In addition, the mobility management network element learns that the network congestion may be a mobility management network element or its own congestion, or that other network elements are congested. The other network element congestion may be a Serving Gateway (SGW), a Packet Data Network (PDN) gateway (PDN Gateway, PGW), a Gateway GPRS Serving Node (GGSN), and a home subscriber. The core network device such as the Home Subscriber Server (HSS) and the Home Location Register (HLR) is congested or the access network device is congested.

 Taking the mobility management network element as the MME as an example, the MME or other network element may be congested by: 3⁄4 port:

 In the first manner, if the request message is sent to the HLR or the HSS, the GGSN, the SGW, the PGW, or the access network device, and the corresponding response message is not received within the preset time, the HLR or the HSS, the GGSN, the SGW, and the PGW are learned. Or access network equipment is congested;

 Or,

 In the second mode, if the used bandwidth of the HLR or the HSS, the GGSN, the SGW, the PGW, or the access network device reaches a preset threshold, the MME receives the notification that the used network element reaches the preset threshold, and the notification sent by the network element is congested. The notification message is obtained according to the notification message, and the corresponding network element is congested.

 Step 12: The access network device rejects or delays access of the terminal according to the indication message. The denying or delaying the access of the terminal may be specifically sending a Radio Resource Control (RRC) connection establishment request to the terminal according to the indication message.

 Specifically, when the access control mode is to restrict IMSI access, the access network device sends a reject RRC connection establishment request to all terminals that use IMSI access; or

When the access control mode is a restricted terminal type, the access network device sends a reject RRC connection establishment request to all terminals belonging to the restricted type after the terminal belonging to the restricted type accesses; or When the access control mode is to limit the priority access, the access network device determines the user priority, and sends a reject RRC connection establishment request to the terminal with the priority lower than the priority threshold, where the access control mode The reason value and the priority threshold are included, and the cause value indicates that the access network performs priority control; or

 When the access control mode is that the terminal that requests the priority service is allowed to access, the access network device only accepts the RRC connection establishment request of the terminal requesting the priority service.

 Further, the access network device may send a reject RRC connection establishment request to the terminal, and record the number of rejections, and accept the access of the terminal when the preset number of times threshold is reached.

 In addition, the terminal in the embodiment of the present invention is not limited to the smart terminal, and is also applicable to other types of terminals, for example: a machine of a machine to a machine.

 In this embodiment, by refusing or delaying the access of the terminal after network congestion occurs, the network congestion condition can be alleviated, and the congestion is further prevented from being further deteriorated.

 FIG. 2 is a schematic flowchart of a method according to a second embodiment of the present invention. This embodiment uses a mobility management network element to reject or delay terminal access as an example. Referring to FIG. 2, this embodiment includes:

 Step 21: The terminal sends an access request to the mobility management network element.

 The access request may be a message that the terminal registers or requests a resource to the network, such as an attach request, a tracking area/router update request, or a service request.

 Step 22: The mobility management network element learns that its own congestion or other network element congestion.

 Among them, you can use the following methods to know that other network elements are congested:

 In the first mode, the mobility management network element sends a request message to other network elements. If the corresponding response message is not received within a certain period of time (the time can be preset), the other network element is known to be congested; or

 Manner 2: When the used bandwidth of other network elements reaches a certain threshold (the threshold can be preset), a notification message is sent to the mobility management network element, where the notification message indicates that other network elements are congested.

 Among them, step 21 and step 22 have no timing constraint relationship.

Step 23: The mobility management network element sends a reject access request to the terminal. The name of the denied access request may be a service request rejection, an attachment rejection, a location update rejection, etc., and the specific name is not limited, and is to refuse or delay the access of the terminal. The denial of access request may be Non-Access Stratum (NAS) signaling.

 In addition, the refusal access request may be used to reject the access of the terminal or to delay the access of the terminal. After the access of the terminal is denied to a certain number of times, the temporary acceptance mode may be used. details as follows:

 Manner 1: Temporarily accepting the terminal after denying the terminal access for a certain number of times: The mobility management network element sends a reject access request to the terminal, and records the number of rejections. When the preset number of times threshold is reached, the terminal access is accepted.

 In the prior art, when the terminal does not successfully access the network, the access request is sent to the network side again. If the attempt is still unsuccessful after a certain number of attempts (for example, the current 3G is 5 times), the station is selected to be camped on other networks, for example, Stationed to the 2G network. However, due to the characteristics of some terminals, for example, the intelligent terminal will continuously try to access 3G, if the smart terminal is stationed at 2G, if it finds that there is a 3G network around, the terminal will still try to continuously register with the 3G network, which will Causes signaling traffic to increase.

 In order to avoid the increase of signaling, this embodiment can adopt the temporary acceptance mode described in the first mode. Specifically, when the number of times the terminal attempts to access is less than the number of times specified by the current protocol or when the network is congested, the network side accepts the access of the terminal, and even if the network side has not authenticated successfully, the user can accept the access. For example, at the 4th time that the terminal attempts to access, even if the network side has not received the authentication response message, it will accept the terminal's access. Or when the network is congested, even if the network has not received the authentication response message from the terminal, the network side still accepts the access of the terminal, thereby preventing the terminal from selecting other network access (for example, 2G network).

However, because the network side is still congested, it is not guaranteed to provide normal services for the terminal. Therefore, the network side can record that the terminal cannot be served temporarily. How to record is not restricted, for example, it can be recorded as temp-attached. If the terminal requests the resource to perform the service at this time, the network side may send a reject message to the terminal, and the reject cause value may be to notify the terminal to delay the request for the resource. Through temporary acceptance, the terminal can be prevented from repeatedly registering between different networks, reducing signaling traffic and alleviating network congestion.

 Manner 2: Delayed terminal access: The mobility management network element sends a reject access request to the terminal, where the reject access request includes a delay value, and the terminal re-accesses the network at the time specified by the delay value.

 Specifically, the reject access request may include a reject cause value and a delay timer, and the reject cause value may be network congestion or indicate terminal delay access.

 The delay value in the delay timer is the time for the specified terminal to delay access on the network side. The delay value is longer than the time that the existing terminal attempts to re-access. For example, in the prior art, when the terminal attempts to access the network, it will re-attempt the access again in about 20 seconds. However, the delay value specified in this embodiment may be greater than the interval at which an existing attempt is re-accessed. For example, if it is set to 30 minutes, the terminal will try to access again after 30 minutes instead of 20 seconds later. Try to access.

 Network congestion can be alleviated by specifying a delay value.

 In addition, if the access request of the user is a service request process, the network side may select according to the terminal type (for example, whether it is a priority service user), the available resources in each network element (for example, the degree of congestion of each network element), and the like. Establish corresponding bearers for the terminal, for example, prioritizing the establishment of quality of service

(Quality of Service, QoS) is a higher bearer resource, or the QoS of the request bearer is appropriately reduced, and resources are saved.

 In this embodiment, the network congestion can be alleviated by refusing or delaying the access of the terminal. At the same time, the network congestion control of the terminal is achieved by the core network rejecting or delaying the access of the terminal.

 FIG. 3 is a schematic flowchart of a method according to a third embodiment of the present invention. In this embodiment, an access network device rejects or delays terminal access as an example. Referring to FIG. 3, this embodiment includes:

 Step 31: When the core network is congested, the mobility management network element sends an indication message to the access network device, where the indication message includes an access control method, so that the access network device rejects or delays according to the access control mode message. Terminal access.

Wherein, the access control refers to denying or delaying the access of the corresponding terminal, and additionally, rejecting or delaying The access of the terminal may include access only by other types of terminals. For example, when only the terminal that requests the priority service is allowed to access, it can still be understood as rejecting or delaying the access of the terminal. The terminal is a terminal that does not request priority services. The access control mode may be to restrict IMSI access, limit priority access, restrict terminal type access, or allow terminal access requesting priority services. Specifically, the IMSI access is restricted to reject or delay the access of the terminal that uses the IMSI, and the priority access is used to reject or delay the access of the low priority terminal, and the access of the specific terminal type is restricted to be rejected or Delaying a certain type of terminal access, allowing terminal access requesting priority services to access only terminals that request priority services and rejecting or delaying access without priority.

 Specifically, for restricting IMSI access: the access network usually does not parse the NAS layer message when the terminal communicates with the core network. Therefore, the access network cannot learn the message type between the specific terminal and the core network, but the access network may The identifier in the message between the terminal and the core network is known, and the identifier can be distinguished as an official identifier or a temporary identifier. In addition, when the terminal communicates with the network side normally, temporary identifiers are used, for example, Temporary Mobile Subscriber Identity (TMSI), Packet TMSI (Packet TMSI, P-TMSI), Globally Unique Temporary Identity (Globally Unique Temporary Identity, GUTI), etc.

 Therefore, in this embodiment, if congestion occurs on the network side, the core network may instruct the terminal to use a formal identifier, for example, IMSI, to re-access. After that, the access network distinguishes the terminal according to the temporary identifier and the official identifier, and rejects or delays access of the terminal that is officially identified.

 Alternatively, when the core network does not need to reject or delay the communication terminal, the core network may not send a message indicating that the terminal uses the IMSI to the terminal, and the core network only informs the access network to reject or delay the use of the IMSI terminal. Access. Since the newly-connected terminal will use IMSI, the access network will reject or delay the newly-entered terminal, and the network congestion will be alleviated to some extent.

 In this embodiment, a message indicating that the terminal uses IMSI is sent to the terminal by using the core network as an example.

For limiting priority access: In the existing mechanism, the allocation of temporary identifiers is controlled by the operator. Usually, the operator can indicate the specific meaning in the specific bits. Therefore, in this embodiment, these can be used. Specific bits represent priorities, for example, for P-TMSI, you can use the network The Network Resource Identifier (NRI) bit, which is the number of bits 14 to 23 of the P-TMSI, indicates the priority.

 When the access control mode sent by the core network is to limit the priority access, the access control mode may specifically include a cause value and a priority threshold, where the cause value indicates that the access network performs priority control, and then the access network device The user priority is determined, and the access of the terminal whose priority is lower than the priority threshold is rejected.

 Further, for the access control mode to limit the priority, the access network device may determine the user priority by using the following manner: The core network device determines the user priority according to the feature information in the temporary identifier, where, when using the foregoing When the priority is included in the NRI, the feature information may be the case where the NRL is used to limit the priority, and the core network does not need to send the message to the terminal to re-access the IMSI, but only needs to use the identifier used in the existing communication. Improvements, such as adding priority information to the temporary identity.

 Similar to the priority, the terminal type may also be identified by some bits in the temporary identifier, so that the access network rejects or delays access of one or several types of terminals.

 Alternatively, the core network may also notify the access network to receive only the access request of the terminal requesting the priority service, for example, only the RRC connection establishment request initiated by the terminal requesting the priority service, and rejecting or delaying the terminal without the priority. Access. For example, the overload start message sent by the core network to the access network is "Permit high priority access session only", and the specific name is not limited, and is used to indicate that the access network device accesses the terminal that requests the priority service. The access request sent by the terminal to the access network device may include related information of the terminal, and according to the related information, the access network may determine whether the terminal requests the priority service, and then, the access network according to whether the priority information is obtained. Perform the above control.

 The access control mode in this embodiment will take the example of rejecting IMSI access.

 In addition, the manner in which the mobility management network element learns that its own congestion or other network element is congested may be specifically referred to in step 22.

Step 32: The terminal sends an access request to the mobility management network element. The access request may be a message that the terminal registers or requests a resource to the network, such as an attach request, a tracking area/router update request, or a service request.

 In addition, the terminal identifier included in the access request is a temporary identifier, such as TMSI, P-TMSI, or GUTI.

 Step 33: The mobility management network element returns a reject access request to the terminal, and the reject access request indicates that the terminal re-accesses with the IMSI.

 The mobility management network element in this embodiment takes the mobility management network element in the PS domain as an example.

 The mobility management network element may reject access of all terminals, and then the denial access request is sent to all terminals. Alternatively, the mobility management network element selects a part of the terminal to reject according to the terminal identifier or the requested network element type, and then sends the rejected access request to some terminals that need to be rejected. For example, the mobility management network element controls the terminal access connected to a certain network element (such as GGSN/HSS), or controls the terminal access of an IMSI range according to the matching relationship between the temporary identifier and the IMSI.

 The reject access request may include a reject cause value, for example, "UE identity cannot be identified by the network", then the terminal will resend the access request to the network side, and The IMSI is used in the resent access request.

 Step 34: The terminal sends a Radio Resource Control (RRC) connection establishment request to the access network device, where the RRC connection establishment request includes IMSI.

 Step 35: The access network device returns a reject RRC connection setup request to the terminal.

 The access network device rejects the IMSI when the RRC connection setup request sent by the terminal includes the IMSI.

The rejecting the RRC connection setup request may be to reject or delay the access of the terminal, for example, when the rejection is performed, the number of rejections is recorded, and when the certain number of times is reached, the access of the terminal is accepted; or, in the rejecting the RRC connection establishment request, The delay value is included to enable the terminal to reconnect to the network after the time specified by the delay value. Specifically, the same principle as the method one or the second method in step 23 can be used. Now.

 In addition, after the core network congestion is removed, the mobility management network element can notify the access network device to cancel the control. That is, it can also include:

 Step 36: After the core network congestion is removed, the mobility management network element sends a cancel control message to the access network device to release access control to the terminal.

 It can be understood that when the access network itself is congested, it is not required to receive the indication message sent by the core network, and the access network may directly reject or delay the access of the terminal, which may be implemented by using the principle of the second embodiment.

 In this embodiment, the network congestion can be alleviated by denying or delaying the access of the terminal. Meanwhile, the access network rejects or delays the access of the terminal through the access network, because the access network is widely distributed, more than the core network, and The notification processing mode is relatively simple, the load is not too large, and more effective mitigation can be achieved.

 FIG. 4 is a schematic flowchart of a method according to a fourth embodiment of the present invention. In this embodiment, a core network device is used as a mobile switching center. In the PS domain, the terminal usually uses the temporary identifier when re-accessing the network. If IMSI is required, the core network is required to notify the terminal to use IMSI. In the CS domain, the terminal uses IMSI access when reselecting the access network. Therefore, in the CS domain, the core network device is not required to notify the terminal to use IMSI.

 Referring to FIG. 4, this embodiment includes:

 Step 41: When the core network is congested, the mobile switching center sends an indication message to the access network device, where the indication message includes an access control mode, so that the access network device rejects or delays the connection of the terminal corresponding to the access control mode. In.

 For details, see step 31.

 Step 42: The terminal sends an access request to the mobile switching center.

 The access request may be a message that the terminal registers or requests a resource to the network, such as an attach request, a tracking area/router update request, or a service request.

 In addition, the terminal identifier included in the access request is a temporary identifier, such as TMSI.

Step 43: The mobile switching center discards the access request. The mobile switching center may discard the access request of all the terminals that send the access request, or select to discard the access request of some of the terminals, for example, discard some terminals that need to send messages to the congested network element device. Access requests, while access requests to other terminals are processed normally.

 Step 44: The terminal does not receive the response message sent by the mobile switching center within a certain period of time, and the terminal re-transmits an RRC connection establishment request to the access network device, where the RRC connection establishment request includes the IMSL.

 Since the CSSI uses the IMSI when the terminal re-accesses the network, the mobile switching center does not need to send a message to the terminal indicating that the terminal uses IMSI.

 Step 45: The access network device returns a reject RRC connection setup request to the terminal.

 For details, see step 35.

 The above is the access of the core network to the control terminal of the access network. It can be understood that the access of the terminal can be directly controlled by the mobile switching center similarly to the first embodiment.

 In this embodiment, network congestion can be alleviated by denying or delaying the access of the terminal. At the same time, for the characteristics of the CS, the core network is not required to notify the terminal to use IMSI when re-accessing, which can reduce the signaling overhead.

 For example, the core network may include an access control mode in the indication message, and may also be configured by the access network to limit access of the low priority terminal after the congestion is learned. details as follows:

 FIG. 5 is a schematic flowchart of a method according to a fifth embodiment of the present invention, including:

 Step 51: The access network device learns that the network is congested;

 The access network device may be aware of its own congestion, or may receive a message sent by the core network indicating that the core network is congested.

 Step 52: The access network device restricts terminal access according to the priority in the temporary identifier of the terminal. Specifically, the access network device may determine the user priority, and send a reject radio resource control RRC connection establishment request to the terminal whose priority is lower than the preset priority threshold.

Further, the determining, by the access network device, the user priority, the method includes: determining, by the access network device, the user priority according to the feature information in the temporary identifier. The feature information in the temporary identifier may be an NRI, where the NRI includes a priority information of the user, which is similar to the method for limiting the priority in the third embodiment, and the temporary identifier is also required to be improved. The identifier contains priority information. Different from the manner of limiting the priority in the third embodiment, the embodiment does not need the core network to send the indication message for limiting the priority, but the access network directly limits the low priority after the network is informed that the network is congested. (The threshold can be pre-configured in the access network device) terminal access.

 In this embodiment, the network congestion can be alleviated by denying or delaying the access of the terminal. Meanwhile, the access network rejects or delays the access of the terminal through the access network, because the access network is widely distributed, more than the core network, and The processing mode of the notification is relatively simple, the load is not too large, and more effective mitigation can be implemented. Moreover, the present embodiment can directly reduce the signaling overhead after knowing the network congestion.

 FIG. 6 is a schematic structural diagram of a device according to a sixth embodiment of the present invention, including a receiving module 61 and a processing module 62. The receiving module 61 is configured to receive an indication message including an access control mode sent by a mobility management network element, where the indication message is The mobility management network element is sent after the network congestion is learned. The processing module 62 is configured to reject or delay access of the terminal according to the indication message.

 The access control mode includes: limiting the IMSI access, or limiting the priority access, or restricting the terminal type access, or allowing the terminal to request the priority service; the processing module 62 is specifically configured to use the The indication message sends a reject radio resource control RRC connection setup request to the terminal.

Specifically, the processing module 62 may include a first unit 621, a second unit 622, a third unit 623, or a fourth unit 624. The first unit 621 is configured to: when the access control mode is to restrict IMSI access, The network access device sends a reject RRC connection setup request to all terminals that use the IMSI access. The second unit 622 is configured to: when the access control mode is the restricted terminal type, the access network device sends all the terminals belonging to the restricted type. The RRC connection establishment request is sent after the terminal of the restricted type is accessed; the third unit 623 is configured to: when the access control mode is to limit the priority access, the access network device determines the user priority, and Send to a terminal with a priority lower than the priority threshold Rejecting an RRC connection establishment request, where the access control mode includes a cause value and a priority threshold, where the cause value indicates that the access network performs priority control; and the fourth unit 624 is configured to: when the access control mode is When the terminal requesting the priority service is allowed to access, the access network device only accepts the RRC connection establishment request of the terminal requesting the priority service.

 Further, the processing module 62 may be further configured to: send a reject RRC connection setup request to the terminal, and record the number of rejections, and accept the terminal's access when the preset number of times threshold is reached.

 In this embodiment, the network congestion can be alleviated by denying or delaying the access of the terminal. Meanwhile, the access network rejects or delays the access of the terminal through the access network, because the access network is widely distributed, more than the core network, and The notification processing mode is relatively simple, the load is not too large, and more effective mitigation can be achieved.

 FIG. 7 is a schematic structural diagram of a device according to a seventh embodiment of the present invention, including a learning module 71 and a limiting module 72; the learning module 71 is configured to access the network device to learn network congestion; and the limiting module 72 is configured to access the network device according to the terminal temporary identifier. Priority, limit terminal access.

 The limiting module 72 may be specifically configured to determine a user priority, and send a reject radio resource control RRC connection establishment request to a terminal whose priority is lower than a preset priority threshold.

 Further, the limiting module 72 is specifically configured to determine the priority of the user according to the priority information included in the network resource identifier in the temporary identifier.

 In this embodiment, the network congestion can be alleviated by denying or delaying the access of the terminal. Meanwhile, the access network rejects or delays the access of the terminal through the access network, because the access network is widely distributed, more than the core network, and The processing mode of the notification is relatively simple, the load is not too large, and more effective mitigation can be implemented. Moreover, the present embodiment can directly reduce the signaling overhead after knowing the network congestion.

 FIG. 8 is a schematic structural diagram of a system according to an eighth embodiment of the present invention, including a mobility management network element 81 and an access network device 82. The mobility management network element 81 is configured to learn network congestion, and send an indication message after learning that the network is congested. The indication message includes an access control mode. The access network device 82 is configured to reject or delay access of the terminal according to the indication message.

The access control mode may be to restrict IMSI access, or to limit priority access, or Limit terminal type access, or allow terminal access requesting priority services.

 When the access control mode is to limit the indication information to restrict IMSI access, the mobility management network element 81 is further configured to send a reject access request to the terminal, so that the terminal receives the rejection. After the access request, the IMSI is used to re-access the network.

 Or, when the mobility management network element is an MSC, the MSC is further configured to discard an access request sent by the terminal.

 In this embodiment, the network congestion can be alleviated by denying or delaying the access of the terminal. Meanwhile, the access network rejects or delays the access of the terminal through the access network, because the access network is widely distributed, more than the core network, and The notification processing mode is relatively simple, the load is not too large, and more effective mitigation can be achieved.

 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; 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.

 It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request  A network congestion processing method, comprising:  The access network device receives an indication message that is sent by the mobility management network element and includes an access control mode, where the indication message is sent by the mobility management network element after the network congestion is learned;  The access network device rejects or delays access of the terminal according to the indication message.  2. The method according to claim 1, wherein the access control mode comprises: restricting an international mobile subscriber identity IMSI access, or limiting priority access, or restricting terminal type access, or allowing a request Terminal access for priority services.  The method according to claim 2, wherein the access network device rejects or delays access of the terminal according to the indication message, and includes:  The access network device sends a reject radio resource control RRC connection setup request to the terminal according to the indication message.  The method according to claim 3, wherein the access network device sends a reject RRC connection setup request to the terminal according to the indication message, including:  When the access control mode is to restrict IMSI access, the access network device sends a reject RRC connection establishment request to all terminals that use IMSI access;  Or,  When the access control mode is a restricted terminal type, the access network device sends a reject RRC connection establishment request to all terminals belonging to the restricted type after the terminal of the restricted type accesses; or  When the access control mode is to limit the priority access, the access network device determines the user priority, and sends a reject RRC connection establishment request to the terminal with the priority lower than the priority threshold, where the access control mode The reason value and the priority threshold are included, and the cause value indicates that the access network performs priority control;  Or, When the access control mode is that the terminal that requests the priority service is allowed to access, the access network device only The RRC connection establishment request of the terminal requesting the priority service is accepted.  The method according to claim 4, wherein the access network device determines the user priority, including:  The access network device determines the priority of the user according to the priority information included in the network resource identifier in the temporary identifier.  The method according to claim 3, wherein the access network device sends a reject RRC connection setup request to the terminal according to the indication message, including:  The access network device sends a reject RRC connection setup request to the terminal, and records the number of rejections. When the threshold number of times is reached, the terminal access is accepted.  The method according to claim 1, wherein the mobility management network element is a mobility management entity MME, and the network congestion is learned, including:  Knowing self-congestion, or knowing that the home location register HLR or home subscriber server HSS, the gateway general packet radio service system support node GGSN, the serving gateway SGW, the packet data network gateway PGW, or the access network equipment are congested.  8. The method according to claim 7, wherein the learning HLR or HSS, The GGSN, SGW, PGW, or access network equipment is congested, including:  If the corresponding response message is not received within a preset time after sending the request message to the HLR or HSS, GGSN, SGW, PGW or access network device, the HLR or HSS, GGSN, SGW, PGW or access is learned. Network equipment congestion;  Or,  If the used bandwidth of the HLR or the HSS, the GGSN, the SGW, the PGW, or the access network device reaches a preset threshold, the notification message that the network element that has used the bandwidth reaches the preset threshold receives the notification that congestion occurs, ^ According to the notification message, the corresponding network element is known to be congested.  A network congestion processing method, comprising:  The access network device learns that the network is congested; The access network device restricts terminal access according to the priority in the temporary identifier of the terminal. The method according to claim 9, wherein the access network device restricts terminal access according to the priority in the temporary identifier of the terminal, and includes:  The access network device determines the user priority and sends a reject radio resource control RRC connection setup request to the terminal whose priority is lower than the preset priority threshold.  The method according to claim 10, wherein the determining, by the access network device, the user priority comprises:  The access network device determines the priority of the user according to the priority information included in the network resource identifier in the temporary identifier.  12. A network device, comprising:  a receiving module, configured to receive, by the mobility management network element, an indication message that includes an access control mode, where the indication message is sent by the mobility management network element after the network congestion is learned;  And a processing module, configured to reject or delay access of the terminal according to the indication message.  13. Apparatus according to claim 12 wherein:  The access control mode includes: restricting the access of the international mobile subscriber identity IMSI, or restricting the priority access, or restricting the terminal type access, or allowing the terminal requesting the priority service to access; the processing module is specifically configured to The indication message sends a rejection radio resource control to the terminal RRC connection setup request.  The device according to claim 13, wherein the processing module comprises: a first unit, configured to: when the access control mode is to restrict IMSI access, the access network device uses all the IMSIs The accessed terminal sends a reject RRC connection establishment request;  Or,  a second unit, configured to: when the access control mode is a restricted terminal type, the access network device sends a reject RRC connection establishment request to all terminals belonging to the restricted type after the terminal of the restricted type accesses;  Or, a third unit, configured to: when the access control mode is to restrict priority access, access network device Determining the priority of the user, and sending a reject RRC connection setup request to the terminal with the priority lower than the priority threshold, where the access control mode includes a cause value and a priority threshold, where the cause value indicates that the access network performs the priority Level control  Or,  The fourth unit is configured to: when the access control mode is a terminal that allows the priority service to be accessed, the access network device only accepts the RRC connection establishment request of the terminal that requests the priority service.  The device according to claim 13, wherein the processing module is further configured to: send a reject RRC connection establishment request to the terminal, and record the number of rejections, and when the preset number of times threshold is reached, accept the terminal Access.  16. A network device, comprising:  The learning module is configured to access the network device to learn network congestion;  The restriction module is configured to limit the terminal access according to the priority in the temporary identifier of the terminal.  The device according to claim 16, wherein the restriction module is specifically configured to use a line resource control RRC connection establishment request.  The device according to claim 17, wherein the limiting module is configured to determine the priority of the user according to the priority information included in the network resource identifier in the temporary identifier.  19. A network system, comprising:  a mobility management network element, configured to learn network congestion, and send an indication message after the network is congested, where the indication message includes an access control mode;  The access network device is configured to reject or delay access of the terminal according to the indication message.  20. The system of claim 19, wherein: The access control mode is to limit the indication information to a restricted international mobile subscriber identity (IMSI) access; the mobility management network element is further configured to send a reject access request to the terminal, so that the terminal receives the Re-accessing the network after using the IMSI after rejecting the access request; or,  The mobility management network element is a mobile switching center MSC, and the MSC is further configured to discard an access request sent by the terminal.