CN103975623A - A method and device for congestion control - Google Patents

Abstract

A method and device for congestion control in the embodiments of the present invention. Wherein, the congestion control method includes: obtaining the SCTP resource status of the stream control transmission protocol, judging whether the SCTP resource status satisfies the congestion judging condition, and executing SCTP congestion control processing when the SCTP resource status satisfies the congestion judging condition. The embodiment of the present invention considers the impact of CPU processing capability on signaling congestion, and then performs congestion control, reduces SCTP signaling delivery or reduces service requests, relieves the SCTP resource shortage of the eNB under the impact of a large number of signaling, and avoids A large number of signaling impacts lead to failures and paralysis, so as to achieve the purpose of SCTP congestion control and ensure the normal operation of eNB services.

Description

A method and device for congestion control

technical field

The present invention relates to the technical field of wireless communication, in particular, to a congestion control method and device for a Stream Control Transmission Protocol (Steam Control Transmission Protocol, SCTP).

Background technique

Long Term Evolution (LTE) system control plane messages are used to ensure the normal operation of the system, the normal establishment and exit of service connections, etc., so the reliability of the control plane messages is very important in the LTE system. The S1 signaling between the enhanced base station (Evolved Node Base station, eNB) and the mobility management entity (Mobility Management Entity, MME) and the X2 signaling between the eNBs are transmitted based on the SCTP protocol.

In a high-load scenario, due to the large number of SCTP messages or the large message traffic, the system is highly congested and can hardly handle other services. In order to prevent SCTP signaling congestion from causing SCTP coupling anomalies and base station/MME anomalies, congestion control is required to improve system signaling processing performance.

Contents of the invention

The present invention proposes a congestion control method and equipment, aiming at alleviating the shortage of SCTP resources of an eNB under the impact of a large number of signalings, and avoiding failure and paralysis of equipment under the impact of a large number of signalings.

In the first aspect, a congestion control method is proposed, including: obtaining the SCTP resource status of the flow control transmission protocol, judging whether the SCTP resource status satisfies the congestion judging condition, and when the SCTP resource status satisfies the congestion judging condition, execute SCTP congestion control processing.

With reference to the first aspect, the SCTP resource status includes the CPU occupancy rate of the central processing unit for processing SCTP signaling and the number of signaling messages for processing SCTP.

With reference to the first aspect, the congestion judging condition includes that the CPU occupancy rate for processing SCTP signaling is greater than a first threshold and the number of SCTP signaling processing is greater than a second threshold.

With reference to the first aspect, the SCTP congestion control process includes constructing SCTP congestion status indication information, the application protocol (S1-Application Protocol, S1-AP) layer of S1 reduces service requests according to the SCTP congestion status indication information, and the S1- The AP layer includes the S1-AP layer of the local device or the S1-AP layer of the peer device.

In the second aspect, a congestion control device is proposed, including a congestion detection module and a congestion processing module. The congestion detection module includes a congestion monitoring unit and a congestion judging unit.

The congestion monitoring unit is used to obtain the SCTP resource status of the flow control transmission protocol; the congestion judging unit is used to judge whether the SCTP resource status satisfies the congestion judging condition; the congestion processing module is used for when the SCTP resource status satisfies the congestion judging condition, perform SCTP congestion control processing.

With reference to the second aspect, the SCTP resource status includes the CPU occupancy rate of the central processing unit for processing SCTP signaling and the number of signaling messages for processing SCTP.

With reference to the second aspect, the congestion judging condition includes that the CPU occupancy rate for processing SCTP signaling is greater than a first threshold and the number of SCTP signaling processing is greater than a second threshold.

With reference to the second aspect, the SCTP congestion control process includes constructing SCTP congestion status indication information, the application protocol (S1-Application Protocol, S1-AP) layer of S1 reduces service requests according to the SCTP congestion status indication information, and the S1- The AP layer includes the S1-AP layer of the local device or the S1-AP layer of the peer device.

In a third aspect, a congestion control device is proposed, including: an interface for signaling interaction between a base station and a core network or between base stations; a memory for storing executable program codes and/or data. The processor is configured to call the program code stored in the memory, and perform the following operations: obtain the SCTP resource status of the stream control transmission protocol, and determine whether the SCTP resource status satisfies the congestion judging condition, and when the SCTP resource status satisfies the congestion judging condition , perform SCTP congestion control processing.

The embodiment of the present invention considers the impact of CPU processing capability on signaling congestion, and then performs congestion control, reduces SCTP signaling delivery or reduces service requests, relieves the SCTP resource shortage of eNB under the impact of a large number of signaling, and avoids A large number of signaling impacts lead to failures and paralysis, so as to achieve the purpose of SCTP congestion control and ensure the normal operation of eNB services.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the embodiments of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic diagram of a wireless communication network.

Fig. 2 is a structural diagram of the S1 protocol stack.

Fig. 3 is a flow chart of the SCTP congestion control processing method.

Fig. 4 is a flow chart of the SCTP congestion control processing method.

Fig. 5 is a flow chart of the SCTP congestion control processing method.

Fig. 6 is a flow chart of the downlink SCTP congestion control processing method on the S1 interface.

FIG. 7 is a flow chart of a method for processing SCTP congestion control uplink on an S1 interface.

FIG. 8 is a schematic structural diagram of an SCTP congestion control processing device.

FIG. 9 is a schematic structural diagram of an SCTP congestion control processing device.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The technical scheme of the present invention can be applied to various communication systems, for example: Global System for Mobile Communications (GSM, Global System for Mobile Communications), Code Division Multiple Access (CDMA, Code Division Multiple Access) system, broadband code division multiple access Access (WCDMA, Wideband Code Division Multiple Access) system, long-term evolution (LTE, Long Term Evolution) system, etc.

As shown in FIG. 1 , the wireless communication network 100 may be an LTE network or other wireless communication networks. The wireless communication network includes several base stations 110 and other network entities to support several user equipments 120 for communication.

The base station 110 may be a base station (BTS, Base TransceiverStation) in GSM or CDMA, or a base station in WCDMA (called Node B), or an evolved base station in LTE (called eNB or e-NodeB, evolutional NodeB). In addition, a base station may support/manage one or more cells (cells). When a UE needs to communicate with the network, it will select a cell to initiate network access.

User equipment 120 (UE, User Equipment) can also be called a mobile terminal (MT, Mobile Terminal), a mobile station (MS, Mobile Station), etc., and can communicate with a radio access network (for example, RAN, Radio Access Network) or multiple core networks for communication. The UE exchanges voice and/or data with the radio access network.

The core network device 130 is connected to one or more base stations, and the core network device 130 is composed of MME and/or other network entities.

For convenience of description, the LTE network is taken as an example for description below, the S1 interface is used between the eNB and the MME, and the X2 interface is used between the eNBs. The protocol stack of the S1 interface is shown in FIG. 2 . In order to reliably transmit signaling messages, an SCTP layer is added on top of an Internet Protocol (Internet Protocol, IP) layer. The X2 interface protocol stack is consistent with the S1 interface.

The S1 signaling between the eNB and the MME and the X2 signaling between the eNBs are transmitted based on the SCTP protocol. In a high-load scenario, due to the large number of SCTP messages or the large message traffic, the system is highly congested and can hardly handle other services. In order to prevent SCTP signaling congestion from causing SCTP coupling anomalies and base station/MME anomalies, congestion control is required to improve system signaling processing performance. Due to the equivalence of the protocol, SCTP congestion control is applicable to both the S1 interface and the X2 interface. That is, when describing the S1 interface, the downlink is between the MME and the eNB, and the uplink is between the eNB and the MME; when describing the X2 interface, the downlink is between the adjacent eNB and the source eNB, and the uplink is between the source eNB and the adjacent eNB .

In practical applications, it is found that the processing capability of a central processing unit (Central Processing Unit, CPU) is an important cause of signaling congestion. However, the existing SCTP congestion control technology does not consider the processing capability of the CPU. In the congestion detection stage, the embodiment of the present invention considers the impact of the CPU processing capability and combines the SCTP signaling processing level to perform congestion control, reduce STCP signaling or reduce service requests, and avoid the impact of a large number of signaling on the device. In this way, the SCTP congestion control can be achieved to ensure the normal operation of the eNB.

The SCTP congestion control method according to the embodiment of the present invention will be described in detail below with reference to FIG. 3 , including the following steps.

31. Obtain the SCTP resource status.

During the communication process, SCTP signaling needs to be exchanged between the eNB and the MME, and the eNB needs to occupy SCTP resources to process the SCTP signaling. Under the SCTP congestion control mechanism, the eNB obtains the SCTP resource status through monitoring. The SCTP resource status includes the CPU occupancy rate for processing SCTP signaling and/or the number of signaling messages for processing SCTP. The number of SCTP signaling messages processed may be the number of SCTP signaling messages received downlink, or the number of SCTP signaling messages processed uplink.

32. Judging whether the SCTP resource status meets the congestion judging condition.

After the eNB acquires the SCTP resource status, it needs to perform congestion judgment. When the SCTP resource status satisfies the congestion judgment condition, it indicates that the system is congested, and performs SCTP congestion processing.

When the above judgment conditions are not met, continue with the process of step 31.

33. SCTP congestion control processing.

When the judging condition in step 32 is met, the SCTP congestion state is reached, and the SCTP congestion control process is executed, thereby reducing signaling or service requests.

The SCTP congestion control in the embodiment of the present invention reduces SCTP signaling delivery or service requests, relieves the SCTP resource shortage of eNB under the impact of a large number of signaling, avoids equipment failure and paralysis under the impact of a large number of signaling, and ensures the service of eNB Work properly.

Fig. 4 describes in detail the SCTP congestion control method of the embodiment of the present invention, comprises the following steps:

41. Obtain SCTP resource status, where the SCTP resource status is the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages processed.

During the communication process, SCTP signaling needs to be exchanged between eNB and MME, and eNB needs to occupy CPU resources to process SCTP signaling. Compared with the entire CPU resources, there is a CPU occupancy rate corresponding to SCTP signaling, which can also be called CPU load. . Under the SCTP congestion control mechanism, the eNB can obtain the CPU occupancy rate for processing SCTP signaling and/or the number of signaling messages processing SCTP by monitoring the status of SCTP resources. The number of SCTP signaling messages processed may be the number of SCTP signaling messages received downlink, or the number of SCTP signaling messages processed uplink.

42. Determine whether the SCTP resource status meets the congestion judging condition, that is, whether the CPU occupancy rate for processing SCTP signaling is greater than a first threshold and/or whether the number of SCTP signaling processing is greater than a second threshold.

After the eNB acquires the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages processed, it needs to perform congestion judgment, when the CPU occupancy rate for processing SCTP signaling is greater than the first threshold, and/or processes SCTP signaling When the number is greater than the second threshold, it indicates that the system is congested, and SCTP congestion control processing is performed.

When the above judgment conditions are not satisfied, continue to the processing procedure of step 41 .

Optionally, for the case that the CPU occupancy rate for processing SCTP signaling is equal to the first threshold, and/or the number of SCTP signaling processing is equal to the second threshold, it can be judged that the system is in a congested state, or it can be judged that the system is in a non-congested state.

43. SCTP congestion control processing.

When the judging condition in step 42 is met, the SCTP congestion state is reached, and the SCTP congestion control process is executed, thereby reducing signaling or service requests.

The embodiment of the present invention considers the impact of CPU processing capability on signaling congestion, and then performs congestion control, reduces SCTP signaling delivery or reduces service requests, relieves the SCTP resource shortage of eNB under the impact of a large number of signaling, and avoids A large number of signaling impacts lead to failures and paralysis, so as to achieve the purpose of SCTP congestion control and ensure the normal operation of eNB services.

Fig. 5 describes in detail the SCTP congestion control method of the embodiment of the present invention, comprises the following steps:

51. Obtain SCTP resource status, where the SCTP resource status is the SCTP sending buffer occupancy rate.

During the communication process, the eNB and the MME need to exchange SCTP signaling, and the eNB needs to occupy the SCTP sending buffer to send the SCTP signaling. When the SCTP transmission buffer resources are exhausted, the eNB needs to occupy a large amount of CPU resources to process the STCP signaling, thereby affecting the normal operation of the eNB service. Under the SCTP congestion control mechanism, the eNB monitors the SCTP resource status and the SCTP transmission buffer occupancy rate.

52. Determine whether the SCTP resource status meets the congestion judging condition, that is, whether the SCTP sending buffer occupancy rate is greater than a third threshold.

After the eNB obtains the SCTP transmission buffer occupancy rate, it needs to perform congestion judgment. When the SCTP transmission buffer occupancy rate is greater than the third threshold, it indicates that the system is congested, and performs SCTP congestion control processing.

When the above judgment conditions are not satisfied, continue to the processing of step 51 .

53. SCTP congestion control processing.

When the judging condition in step 52 is satisfied, the SCTP congestion state is reached, and the SCTP congestion control process is executed, thereby reducing service requests.

The embodiment of the present invention reduces SCTP service requests through congestion control, relieves the SCTP resource shortage of the eNB under the impact of a large amount of signaling, and avoids equipment failure and paralysis under the impact of a large amount of signaling, thereby achieving the purpose of SCTP congestion control and ensuring eNB business as usual.

The following takes the S1 interface of the LTE network as an example to describe the uplink and downlink SCTP congestion control method in detail.

Fig. 6 is a flow chart of the downlink SCTP congestion control processing method on the S1 interface.

The downlink SCTP congestion control process on the S1 interface refers to the SCTP congestion control process between the MME and the eNB. When the MME sends SCTP signaling to the eNB, when the signaling load is heavy, the SCTP resources of the eNB will be strained, including the processing and receiving of the SCTP by the eNB will occupy a large amount of CPU resources and SCTP buffer resources, etc., which will affect the business. Work properly.

61. Acquire the CPU occupancy rate for processing SCTP signaling and/or the number of received SCTP signaling messages.

MME sends SCTP signaling to eNB. Under the SCTP congestion control mechanism, eNB can obtain the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages received from MME by monitoring the SCTP resource status, and then perform congestion discrimination. .

62. Determine whether the CPU occupancy rate for processing SCTP signaling is greater than a first threshold and/or whether the number of SCTP signaling processing is greater than a second threshold.

After the eNB acquires the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages processed, it performs congestion judgment. When the CPU occupancy rate for processing SCTP signaling is greater than the first threshold, and/or the number of SCTP signaling messages is processed When it is greater than the second threshold, it indicates that the system is congested. When the system is congested, congestion control processing is required to ensure that the eNB works normally when there is a large signaling service.

The settings of the first threshold and the second threshold can be pre-configured according to system processing capability. The embodiment of the present invention does not limit the setting of the first threshold and the second threshold.

Specifically, the number of SCTP signaling processed may be the number of SCTP signaling processed per second, the first threshold is 85%, and the second threshold is 3500 packets/second (that is, signaling packets processed per second).

When only the CPU occupancy of SCTP signaling is used for congestion judgment, the specifics are: when the CPU occupancy of SCTP signaling is greater than 85%, it is judged that the system is in a congested state and congestion control needs to be performed; when only SCTP signaling is used When the number of signaling is used for congestion judgment, specifically: when the number of signaling for processing SCTP is greater than 3500 packets/second, it is judged that the system is in a congested state and congestion control is required. When judging congestion based on the CPU occupancy of SCTP signaling and the number of SCTP signaling, the specific conditions are: when the CPU occupancy of SCTP signaling is greater than 85%, and the number of SCTP signaling is greater than When the packet/second is 3500, it is judged that the system is in a congested state, and congestion control is required.

Optionally, when the CPU occupancy rate for processing SCTP signaling is equal to 85%, and/or the number of SCTP signaling processing is equal to 3500 packets/second, it can be judged that the system is in a congested state, or it can be judged that the system is in a non-congested state.

When the above judgment conditions are not met, continue to monitor the SCTP resource status.

63. SCTP congestion control processing.

When the system is in SCTP congestion state, perform SCTP congestion control processing. The specific treatment is as follows:

The eNB stores the SCTP signaling exceeding the second threshold in the SCTP signaling buffer and does not process it. At the same time, the length of the buffer area is calculated to obtain the remaining length information of the buffer area.

The SCTP congestion status indication information is constructed, and the application protocol (S1-ApplicationProtocol, S1-AP) layer of S1 reduces service requests according to the SCTP congestion status indication information. The application protocol (S1-Application Protocol, S1-AP) layer of S1 includes the S1-AP layer of the local device or the S1-AP layer of the peer device.

For SCTP congestion control between eNB and MME, eNB sends SCTP congestion status indication information to MME through the S1 interface, so that the application protocol (S1-Application Protocol, S1-AP) layer of MME S1 according to the received SCTP congestion status indication Information reduces business requests. For SCTP congestion control between eNB and neighboring eNB, eNB sends SCTP congestion status indication information to neighboring eNB through X2 interface, so that the application protocol (S1-Application Protocol, S1-AP) layer of S1 of neighboring eNB according to The received SCTP congestion status indication information reduces the service request.

The eNB constructs SCTP congestion status indication information according to the buffer remaining length information, and sends the SCTP congestion status indication information to the MME through the S1 interface, and the SCTP congestion status indication information includes the buffer remaining length information. After the SCTP layer of the MME obtains the SCTP congestion status indication information, it backpressures the S1-AP layer of the MME, and the S1-AP layer reduces the corresponding service request, that is, the core network reduces the initial S1-AP message according to the downlink SCTP congestion indication information, Such as paging messages, etc. At the same time, before SCTP congestion is resolved, MME S1-AP can ensure that high-priority signaling is transmitted first, and low-priority signaling is temporarily buffered for a period of time (50ms) before transmission, and even discards low-priority signaling. The reduction of service requests by the MME means the reduction of SCTP signaling for the eNB.

Optionally, if the MME cannot ensure congestion control, the eNB notifies the S1-AP layer of the eNB of the SCTP congestion status indication information, and the S1-AP layer of the eNB uses this to prioritize high-priority signaling and identify low-priority signaling Signaling, low-priority signaling is temporarily buffered for a period of time (50ms) before processing, and even low-priority signaling can be discarded. By delaying the processing or discarding of low-priority signaling, the eNB can achieve the purpose of reducing SCTP signaling.

For SCTP congestion control processing with adjacent base stations through the X2 interface, the process is the same.

64. The congestion is relieved.

When the system is in a congested state, the eNB performs congestion control processing, thereby reducing the CPU occupancy rate of the eNB for processing SCTP signaling. The eNB can obtain the CPU occupancy rate for processing SCTP signaling by monitoring the SCTP resource status. When the CPU occupancy rate for processing SCTP signaling is less than the first threshold, it indicates that the system congestion has been relieved, and the system congestion state can be released.

Specifically, when the CPU occupation rate for processing SCTP signaling is less than 85%, the system congestion state may be released.

The embodiment of the present invention considers the impact of CPU processing capacity on signaling congestion, and then performs congestion control, reduces SCTP signaling delivery, alleviates the SCTP resource shortage of eNB under the impact of a large number of signaling, and avoids the eNB under the impact of a large number of signaling. In this way, the SCTP congestion control can be achieved to ensure the normal operation of the eNB.

FIG. 7 is a flow chart of a method for processing SCTP congestion control uplink on an S1 interface.

The uplink SCTP congestion control process on the S1 interface refers to the SCTP congestion control process between the eNB and the MME. The eNB sends SCTP signaling to the MME. When the signaling load is heavy, the SCTP resources of the eNB will be strained, including the exhaustion of the uplink SCTP sending buffer resources of the eNB, which will occupy a large amount of CPU resources. In this case, the eNB chain abnormal channel release and service interruption.

71. Acquire the CPU occupancy rate for processing SCTP signaling and/or the number of processed SCTP signaling messages, or acquire the occupancy rate of the SCTP sending buffer.

The eNB sends SCTP signaling to the MME. Under the SCTP congestion control mechanism, the eNB can obtain the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages processed by monitoring the SCTP resource status, and then perform congestion judgment.

The eNB sends the SCTP signaling to the MME, and the signaling is stored in the SCTP sending buffer. Optionally, the eNB may obtain the SCTP sending buffer occupancy rate. When the signaling load is heavy, the SCTP sending buffer resources of the eNB will be exhausted, that is, the buffer capacity occupancy rate has reached 100%.

72. Determine whether the CPU occupancy rate for processing SCTP signaling is greater than a first threshold and/or whether the number of SCTP signaling processes is greater than a second threshold, or determine whether the SCTP sending buffer occupancy rate is greater than a third threshold.

After obtaining the CPU occupancy rate for processing SCTP signaling and the number of processed SCTP signaling messages, the eNB performs congestion judgment, when the CPU occupancy rate for processing SCTP signaling is greater than the first threshold, and/or the number of SCTP signaling processing is greater than the first threshold When the threshold is two, it indicates that the system is congested. When the system is congested, congestion control processing is required to ensure that the eNB works normally when there is a large signaling service.

The setting of the first threshold and the second threshold may be pre-configured according to the system processing capability, and the embodiment of the present invention does not limit the setting of the first threshold and the second threshold. Under the uplink SCTP congestion control mechanism, the specific values of the first threshold and the second threshold may be different from the specific values of the first threshold and the second threshold of the downlink SCTP congestion control.

Specifically, the value of the first threshold is 85%, and the value of the second threshold is 2700 packets/second (that is, signaling packets processed per second).

When only the CPU occupancy of SCTP signaling is used for congestion judgment, the specifics are: when the CPU occupancy of SCTP signaling is greater than 85%, it is judged that the system is in a congested state and congestion control needs to be performed; when only SCTP signaling is used When judging congestion based on the number of signalings, specifically: when the number of signalings processed by SCTP is greater than 2700 packets/second, it is judged that the system is in a congested state and congestion control is required. When judging congestion based on the CPU occupancy of SCTP signaling and the number of SCTP signaling, the specific conditions are: when the CPU occupancy of SCTP signaling is greater than 85%, and the number of SCTP signaling is greater than When the packet/second is 2700, it is judged that the system is in a congested state, and congestion control is required.

Optionally, when the CPU occupancy rate for processing SCTP signaling is equal to 85%, and/or the number of SCTP signaling processing is equal to 2700 packets/second, it can be judged that the system is in a congested state, or it can be judged that the system is in a non-congested state.

When the above judgment conditions are not met, continue to monitor the SCTP resource status.

Optionally, the eNB may perform congestion judgment only based on the SCTP sending buffer occupancy rate. When the SCTP sending buffer occupancy rate is greater than the third threshold, it is determined that the system is in a congested state. The setting of the third threshold may be pre-configured according to the system processing capability, and the embodiment of the present invention does not limit the setting of the third threshold.

Specifically, the third threshold takes a value of 80%, and when the SCTP sending buffer occupancy rate is greater than 80%, it is determined that the system is in a congested state. For the case where the SCTP send buffer occupancy rate is equal to 80%, it can be judged that the system is in a congested state, or it can be judged that the system is in a non-congested state.

When the judging condition of the SCTP sending buffer occupancy rate is not met, continue to monitor the SCTP resource status.

73. SCTP congestion control processing.

When the system is in SCTP congestion state, perform SCTP congestion control processing.

The eNB constructs the SCTP congestion status indication information according to the CPU occupancy rate for processing SCTP signaling and the number of processed SCTP signaling messages, or constructs the SCTP congestion status indication information according to the SCTP sending buffer occupancy rate.

The eNB notifies the S1-AP layer of the eNB of the SCTP congestion status indication information, and the S1-AP layer of the eNB processes the high-priority signaling first, and recognizes the low-priority signaling, and temporarily buffers the low-priority signaling for a period of time (50ms) before processing, and even discard low-priority signaling. Delay the processing or discarding of low-priority signaling to reduce SCTP service requests.

74. The congestion is relieved.

When the system is in a congested state, the eNB performs congestion control processing, thereby reducing the CPU occupancy rate of the eNB for processing SCTP signaling or reducing the occupancy rate of the SCTP sending buffer. When the CPU occupancy rate of the SCTP signaling is less than the first threshold or the SCTP sending buffer occupancy rate is less than the third threshold, it indicates that the system congestion has been alleviated, and the system congestion state can be released.

Specifically, when the occupancy rate of the CPU for processing SCTP signaling is less than 85% or the occupancy rate of the SCTP sending buffer is less than 80%, the system congestion state may be released.

The embodiment of the present invention considers the impact of CPU processing capability on signaling congestion, and then performs congestion control to reduce service requests, thereby reducing SCTP signaling transmission, alleviating the SCTP resource shortage of eNB under the impact of a large number of signaling, and avoiding eNB A large number of signaling impacts lead to failures and paralysis, so as to achieve the purpose of SCTP congestion control and ensure the normal operation of eNB services.

Corresponding to the embodiment of the congestion control method of the present invention, the present invention also provides a device embodiment of congestion control.

FIG. 8 is a structural schematic diagram of a device 80 according to an embodiment of the present invention.

The device includes: a congestion detection module 81 and a congestion processing module 82 . The congestion detection module 81 includes: a congestion monitoring unit 810 and a congestion judging unit 811 .

The congestion monitoring unit 810 is configured to obtain SCTP resource status, where the SCTP resource status is the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages.

During the communication process, SCTP signaling needs to be exchanged between eNB and MME, and eNB needs to occupy CPU resources to process SCTP signaling. Compared with the entire CPU resources, there is a CPU occupancy rate corresponding to SCTP signaling, which can also be called CPU load. . Under the SCTP congestion control mechanism, the eNB can obtain the SCTP resource status through the congestion monitoring unit 810 , and the SCTP resource status is: the CPU occupation rate for processing SCTP signaling and/or the number of SCTP signaling messages processed. The number of SCTP signaling messages processed may be the number of SCTP signaling messages received downlink, or the number of SCTP signaling messages processed uplink.

For downlink congestion control, the MME sends SCTP signaling to the eNB. Under the SCTP congestion control mechanism, the eNB can obtain the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages received from the MME through the congestion monitoring unit 810 , and then carry out congestion judgment.

For uplink congestion control, the eNB sends SCTP signaling to the MME. Under the SCTP congestion control mechanism, the eNB can obtain the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages processed through the congestion monitoring unit 810, and then Carry out congestion judgment. For uplink congestion control, optionally, the eNB can obtain the SCTP transmission buffer occupancy rate through the congestion monitoring unit 810, that is, only use the SCTP transmission buffer occupancy rate as the available SCTP resource status.

The congestion judging unit 811 is configured to judge whether the SCTP resource status meets the congestion judging condition, that is, whether the CPU occupancy rate for processing SCTP signaling is greater than a first threshold and/or whether the number of SCTP signaling processing is greater than a second threshold.

When the CPU occupancy rate for processing SCTP signaling is greater than the first threshold, and/or the number of SCTP signaling processing is greater than the second threshold, it indicates that the system is congested, and SCTP congestion control processing is performed.

When the above judgment condition is not met, continue to monitor the SCTP resource status.

Optionally, for the case that the CPU occupancy rate for processing SCTP signaling is equal to the first threshold, and/or the number of SCTP signaling processing is equal to the second threshold, it can be judged that the system is in a congested state, or it can be judged that the system is in a non-congested state.

For downlink congestion control, specifically, the value of the first threshold is 85%, and the value of the second threshold is 3500 packets/second. When only the CPU occupancy of SCTP signaling is used for congestion judgment, the specifics are: when the CPU occupancy of SCTP signaling is greater than 85%, it is judged that the system is in a congested state and congestion control needs to be performed; when only SCTP signaling is used When the number of signaling is used for congestion judgment, specifically: when the number of signaling for processing SCTP is greater than 3500 packets/second, it is judged that the system is in a congested state and congestion control is required. When judging congestion based on the CPU occupancy of SCTP signaling and the number of SCTP signaling, the specific conditions are: when the CPU occupancy of SCTP signaling is greater than 85%, and the number of SCTP signaling is greater than When the packet/second is 3500, it is judged that the system is in a congested state, and congestion control is required. When the above judgment conditions are not met, continue to monitor the SCTP resource status.

For uplink congestion control, specifically, the value of the first threshold is 85%, and the value of the second threshold is 2700 packets/second. When only the CPU occupancy of SCTP signaling is used for congestion judgment, the specifics are: when the CPU occupancy of SCTP signaling is greater than 85%, it is judged that the system is in a congested state and congestion control needs to be performed; when only SCTP signaling is used When judging congestion based on the number of signalings, specifically: when the number of signalings processed by SCTP is greater than 2700 packets/second, it is judged that the system is in a congested state and congestion control is required. When judging congestion based on the CPU occupancy of SCTP signaling and the number of SCTP signaling, the specific conditions are: when the CPU occupancy of SCTP signaling is greater than 85%, and the number of SCTP signaling is greater than When the packet/second is 2700, it is judged that the system is in a congested state, and congestion control is required. When the above judgment conditions are not met, continue to monitor the SCTP resource status.

The setting of the first threshold and the second threshold may be pre-configured according to the system processing capability, and the embodiment of the present invention does not limit the setting of the first threshold and the second threshold. Under the uplink SCTP congestion control mechanism, the specific values of the first threshold and the second threshold may be different from the specific values of the first threshold and the second threshold of the downlink SCTP congestion control.

For uplink congestion control, optionally, the eNB can obtain the SCTP transmission buffer occupancy rate according to the congestion monitoring unit 810 , and perform congestion discrimination through the congestion discrimination unit 811 . That is, when the SCTP sending buffer occupancy rate is greater than the third threshold, it is determined that the system is in a congested state. The setting of the third threshold may be pre-configured according to the system processing capability, and the embodiment of the present invention does not limit the setting of the third threshold. Specifically, the third threshold takes a value of 80%, and when the SCTP sending buffer occupancy rate is greater than 80%, it is determined that the system is in a congested state. When the judging condition of the SCTP sending buffer occupancy rate is not met, continue to monitor the SCTP resource status.

The congestion processing module 82 is configured to perform congestion control processing in a congestion state.

For downlink congestion control, the congestion control process is as follows:

The eNB stores the SCTP signaling exceeding the second threshold in the SCTP signaling buffer and does not process it. At the same time, the length of the buffer area is calculated to obtain the remaining length information of the buffer area.

The eNB constructs SCTP congestion status indication information according to the buffer remaining length information, and sends the SCTP congestion status indication information to the MME through the S1 interface, and the SCTP congestion status indication information includes the buffer remaining length information. After the SCTP layer of the MME obtains the SCTP congestion status indication information, it backpressures the S1 application protocol (S1-Application Protocol, S1-AP) layer of the MME, and the S1-AP layer reduces the corresponding service request, that is, the core network Indicates information to reduce initial S1-AP messages, such as paging messages. At the same time, before SCTP congestion is resolved, MME S1-AP can ensure that high-priority signaling is transmitted first, and low-priority signaling is temporarily buffered for a period of time (50ms) before transmission, and even discards low-priority signaling. The reduction of service requests by the MME means the reduction of SCTP signaling for the eNB.

Optionally, if the MME cannot ensure congestion control, the eNB notifies the S1-AP layer of the eNB of the SCTP congestion status indication information, and the S1-AP layer of the eNB uses this to prioritize high-priority signaling and identify low-priority signaling Signaling, low-priority signaling is temporarily buffered for a period of time (50ms) before processing, and even low-priority signaling can be discarded. By delaying the processing or discarding of low-priority signaling, the eNB can achieve the purpose of reducing SCTP signaling.

For uplink congestion control, the congestion control process is as follows:

The eNB constructs the SCTP congestion status indication information according to the CPU occupancy rate for processing SCTP signaling and the number of processed SCTP signaling messages, or constructs the SCTP congestion status indication information according to the SCTP sending buffer occupancy rate.

The eNB notifies the S1-AP layer of the eNB of the SCTP congestion status indication information, and the S1-AP layer of the eNB processes the high-priority signaling first, and recognizes the low-priority signaling, and temporarily buffers the low-priority signaling for a period of time (50ms) before processing, and even discard low-priority signaling. Delay the processing or discarding of low-priority signaling to reduce SCTP service requests.

The congestion judging unit 811 can also be used for congestion relief processing.

When the system is in a congested state, the eNB performs congestion control processing through the congestion processing module 82, thereby reducing the CPU occupancy rate of the eNB for processing SCTP signaling. The eNB monitors the SCTP resource status through the congestion monitoring unit 810 to obtain the CPU occupancy rate for processing SCTP signaling, and then performs congestion discrimination through the congestion determination unit 811. When the CPU occupancy rate for processing SCTP signaling is less than the first threshold, it indicates The system congestion has been relieved, and the system congestion state can be released. Specifically, when the CPU occupation rate for processing SCTP signaling is less than 85%, the system congestion state may be released.

For uplink congestion control, optionally, when the system is in a congested state, the eNB performs congestion control processing through the congestion processing module 82, thereby reducing the SCTP sending buffer occupancy rate. The eNB monitors the SCTP resource status through the congestion monitoring unit 810 to obtain the SCTP sending buffer occupancy rate, and then performs congestion judgment through the congestion judging unit 811. When the SCTP sending buffer occupancy rate is less than the third threshold, it indicates that the system congestion has been alleviated. The system congestion state can be relieved. Specifically, when the occupancy rate of the SCTP sending buffer is less than 80%, the system congestion state may be released.

The embodiment of the present invention considers the impact of CPU processing capability on signaling congestion, and then performs congestion control, reduces SCTP signaling delivery or reduces service requests, relieves the SCTP resource shortage of eNB under the impact of a large number of signaling, and avoids A large number of signaling impacts lead to failures and paralysis, so as to achieve the purpose of SCTP congestion control and ensure the normal operation of eNB services.

FIG. 9 is a structural schematic diagram of a device 90 according to an embodiment of the present invention.

The congestion control processing device 90 may be a base station 110 in FIG. 1 , and includes: an interface 91 , a processor 92 , and a memory 93 . The interface 91, the processor 92 and the memory 93 are connected through a bus. Of course, the device may also include common components such as a transceiver antenna and an intermediate radio frequency processing component, which are not limited in this embodiment of the present invention.

The interface 91 may be an S1 interface between the base station and the core network, or an X2 interface between the base stations. This interface is used for signaling interaction between the base station and the core network or between base stations.

Memory 93 may include random access memory (RAM, Random Access Memory) and read-only memory (ROM, Read-Only Memory), or any fixed storage medium, or removable storage medium, for storing the The program code of the example and/or the data to be processed in the embodiment of the present invention.

The processor 92 is used to call the program code stored in the memory to perform the following operations:

The SCTP resource status is acquired, where the SCTP resource status is the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages.

During the communication process, the eNB and the MME exchange SCTP signaling through the interface 91. The eNB needs to occupy CPU resources to process the SCTP signaling. Compared with the entire CPU resource, there is a CPU occupancy rate corresponding to the SCTP signaling, which can also be called CPU load. Under the SCTP congestion control mechanism, the eNB can obtain the SCTP resource status through the processor 92, and the SCTP resource status is: the CPU occupation rate for processing SCTP signaling and/or the number of signaling messages for processing SCTP. The number of SCTP signaling messages processed may be the number of SCTP signaling messages received downlink, or the number of SCTP signaling messages processed uplink.

For downlink congestion control, the MME sends SCTP signaling to the eNB. Under the SCTP congestion control mechanism, the eNB can obtain the CPU occupancy rate for processing the SCTP signaling and/or the number of SCTP signaling messages received from the MME through the processor 92, Then perform congestion judgment.

For uplink congestion control, the eNB sends SCTP signaling to the MME. Under the SCTP congestion control mechanism, the eNB can obtain the CPU occupancy rate for processing SCTP signaling and/or the number of SCTP signaling messages processed by the eNB through the processor 92, and then perform Congestion discrimination. For uplink congestion control, optionally, the eNB can obtain the SCTP transmission buffer occupancy rate through the processor 92, that is, only use the SCTP transmission buffer occupancy rate as the available SCTP resource status.

The processor 92 is also configured to determine whether the acquired SCTP resource status meets the congestion judging condition, that is, whether the CPU occupancy rate for processing SCTP signaling is greater than a first threshold and/or whether the number of SCTP signaling processing is greater than a second threshold.

When the CPU occupancy rate for processing SCTP signaling is greater than the first threshold, and/or the number of SCTP signaling processing is greater than the second threshold, it indicates that the system is congested, and SCTP congestion control processing is performed.

When the above judgment condition is not met, continue to monitor the SCTP resource status.

Optionally, for the case that the CPU occupancy rate for processing SCTP signaling is equal to the first threshold, and/or the number of SCTP signaling processing is equal to the second threshold, it can be judged that the system is in a congested state, or it can be judged that the system is in a non-congested state.

For downlink congestion control, specifically, the value of the first threshold is 85%, and the value of the second threshold is 3500 packets/second. When only the CPU occupancy of SCTP signaling is used for congestion judgment, the specifics are: when the CPU occupancy of SCTP signaling is greater than 85%, it is judged that the system is in a congested state and congestion control needs to be performed; when only SCTP signaling is used When the number of signaling is used for congestion judgment, specifically: when the number of signaling for processing SCTP is greater than 3500 packets/second, it is judged that the system is in a congested state and congestion control is required. When judging congestion based on the CPU occupancy of SCTP signaling and the number of SCTP signaling, the specific conditions are: when the CPU occupancy of SCTP signaling is greater than 85%, and the number of SCTP signaling is greater than When the packet/second is 3500, it is judged that the system is in a congested state, and congestion control is required. When the above judgment conditions are not met, continue to monitor the SCTP resource status.

For uplink congestion control, specifically, the value of the first threshold is 85%, and the value of the second threshold is 2700 packets/second. When only the CPU occupancy of SCTP signaling is used for congestion judgment, the specifics are: when the CPU occupancy of SCTP signaling is greater than 85%, it is judged that the system is in a congested state and congestion control needs to be performed; when only SCTP signaling is used When judging congestion based on the number of signalings, specifically: when the number of signalings processed by SCTP is greater than 2700 packets/second, it is judged that the system is in a congested state and congestion control is required. When judging congestion based on the CPU occupancy of SCTP signaling and the number of SCTP signaling, the specific conditions are: when the CPU occupancy of SCTP signaling is greater than 85%, and the number of SCTP signaling is greater than When the packet/second is 2700, it is judged that the system is in a congested state, and congestion control is required. When the above judgment conditions are not met, continue to monitor the SCTP resource status.

The setting of the first threshold and the second threshold may be pre-configured according to the system processing capability, and the embodiment of the present invention does not limit the setting of the first threshold and the second threshold. Under the uplink SCTP congestion control mechanism, the specific values of the first threshold and the second threshold may be different from the specific values of the first threshold and the second threshold of the downlink SCTP congestion control.

For uplink congestion control, optionally, the eNB may only obtain the SCTP transmission buffer occupancy rate according to the processor 92, and perform congestion judgment through the processor 92. That is, when the SCTP sending buffer occupancy rate is greater than the third threshold, it is determined that the system is in a congested state. The setting of the third threshold may be pre-configured according to the system processing capability, and the embodiment of the present invention does not limit the setting of the third threshold. Specifically, the third threshold takes a value of 80%, and when the SCTP sending buffer occupancy rate is greater than 80%, it is determined that the system is in a congested state. When the judging condition of the SCTP sending buffer occupancy rate is not met, continue to monitor the SCTP resource status.

The processor 92 is also configured to perform congestion control processing in a congestion state.

For downlink congestion control, the congestion control process is as follows:

The SCTP signaling exceeding the second threshold is stored in the SCTP signaling buffer, that is, the memory 93, and is not processed. At the same time, the length of the buffer area is calculated to obtain the remaining length information of the buffer area.

Construct SCTP congestion status indication information according to the buffer remaining length information, and send the SCTP congestion status indication information to the MME through the interface 91, where the SCTP congestion status indication information includes the buffer remaining length information. After the SCTP layer of the MME obtains the SCTP congestion status indication information, it backpressures the S1-AP layer of the MME, and the S1-AP layer reduces the corresponding service request, that is, the core network reduces the initial S1-AP message according to the downlink SCTP congestion indication information, Such as paging messages, etc. At the same time, before SCTP congestion is resolved, MME S1-AP can ensure that high-priority signaling is transmitted first, and low-priority signaling is temporarily buffered for a period of time (50ms) before transmission, and even discards low-priority signaling. The reduction of service requests by the MME means the reduction of SCTP signaling for the eNB.

Optionally, if the MME cannot ensure congestion control, it will notify the S1-AP layer of the eNB of the SCTP congestion status indication information, and the S1-AP layer of the eNB will preferentially process high-priority signaling and identify low-priority signaling low-priority signaling is temporarily buffered for a period of time (50ms) before processing, and even low-priority signaling can be discarded. By delaying the processing or discarding of low-priority signaling, the eNB can achieve the purpose of reducing SCTP signaling.

For uplink congestion control, the congestion control process is as follows:

The SCTP congestion status indication information is constructed according to the CPU occupancy rate for processing SCTP signaling and the number of processed SCTP signaling messages, or the SCTP congestion status indication information is constructed according to the SCTP sending buffer occupancy rate. The SCTP send buffer is also part of memory 93 .

Notify the SCTP congestion status indication information to the S1-AP layer of the eNB, and the S1-AP layer of the eNB will process the high-priority signaling first, and identify the low-priority signaling, and temporarily buffer the low-priority signaling for a period of time ( 50ms) before processing, and even discard low-priority signaling. Delay the processing or discarding of low-priority signaling to reduce SCTP service requests.

Processor 92 is also used for congestion relief processing.

When the system is in a congested state, the eNB performs congestion control processing through the processor 92, thereby reducing the CPU occupancy rate of the eNB for processing SCTP signaling. The eNB monitors the SCTP resource status through the processor 92 to obtain the CPU occupancy rate for processing SCTP signaling, and then the processor 92 performs congestion judgment. When the CPU occupancy rate for processing SCTP signaling is less than the first threshold, it indicates that the system is congested. Relief, which can relieve the system congestion state. Specifically, when the CPU occupation rate for processing SCTP signaling is less than 85%, the system congestion state may be released.

For uplink congestion control, optionally, when the system is in a congested state, the eNB performs congestion control processing through the processor 92, thereby reducing the SCTP sending buffer occupancy rate. The eNB monitors the SCTP resource status through the processor 92 to obtain the SCTP transmission buffer occupancy rate, and then performs congestion judgment through the processor 92. When the SCTP transmission buffer occupancy rate is less than the third threshold, it indicates that the system congestion has been alleviated and can be released. The system is congested. Specifically, when the occupancy rate of the SCTP sending buffer is less than 80%, the system congestion state may be released.

The embodiment of the present invention considers the impact of CPU processing capability on signaling congestion, and then performs congestion control, reduces SCTP signaling delivery or reduces service requests, relieves the SCTP resource shortage of eNB under the impact of a large number of signaling, and avoids A large number of signaling impacts lead to failures and paralysis, so as to achieve the purpose of SCTP congestion control and ensure the normal operation of eNB services.

It should be understood that the solution described in each claim of the present invention should also be regarded as an embodiment, and the features in the claims can be combined, such as the steps of different branches executed after the judgment step in the present invention Can be used as different embodiments.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and other media that can store program codes.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (21)

1. A congestion control method, characterized in that, comprising: Get the SCTP resource status of the Stream Control Transmission Protocol; Judging whether the SCTP resource condition satisfies the congestion judging condition; When the SCTP resource status satisfies the congestion judging condition, perform SCTP congestion control processing. 2. The method according to claim 1, wherein the SCTP resource status comprises: CPU occupancy of the central processing unit processing SCTP signaling and the number of SCTP signaling messages processed. 3. The method according to claim 1 or 2, wherein the congestion judging condition comprises: The CPU occupancy rate for processing SCTP signaling is greater than the first threshold and the number of SCTP signaling processing is greater than the second threshold. 4. The method according to any one of claims 1 to 3, wherein the SCTP congestion control process comprises: Construct the SCTP congestion state indication information, the application protocol (S1-ApplicationProtocol, S1-AP) layer of S1 reduces the service request according to the SCTP congestion state indication information, and the S1-AP layer includes the S1-AP layer of the local equipment or the pair The S1-AP layer of the end device. 5. The method according to claim 1, wherein the SCTP resource status includes an SCTP sending buffer occupancy rate; and the congestion judging condition includes that the SCTP sending buffer occupancy rate is greater than a third threshold. 6. The method according to claim 4, characterized in that, after performing the SCTP congestion control process, comprising: The CPU occupancy rate for processing SCTP signaling is less than the first threshold, and system congestion is relieved. 7. The method according to claim 5, characterized in that, after performing the SCTP congestion control process, comprising: The SCTP sending buffer occupancy rate is less than the third threshold, and the system congestion is relieved. 8. A congestion control device, comprising: The congestion monitoring unit is used to obtain the SCTP resource status of the flow control transmission protocol; A congestion judging unit, configured to judge whether the SCTP resource condition satisfies the congestion judging condition; A congestion processing module, configured to perform SCTP congestion control processing when the SCTP resource condition meets the congestion judging condition. 9. The device according to claim 8, wherein the SCTP resource status comprises: CPU occupancy of the central processing unit processing SCTP signaling and the number of SCTP signaling messages processed. 10. The device according to claim 8 or 9, wherein the congestion judging conditions include: The CPU occupancy rate for processing SCTP signaling is greater than the first threshold and the number of SCTP signaling processing is greater than the second threshold. 11. The device according to any one of claims 8 to 10, wherein the SCTP congestion control process comprises: Construct the SCTP congestion state indication information, the application protocol (S1-ApplicationProtocol, S1-AP) layer of S1 reduces the service request according to the SCTP congestion state indication information, and the S1-AP layer includes the S1-AP layer of the local equipment or the pair The S1-AP layer of the end device. 12 . The device according to claim 8 , wherein the SCTP resource status includes an SCTP sending buffer occupancy rate; and the congestion judging condition includes that the SCTP sending buffer occupancy rate is greater than a third threshold. 13. The device according to claim 11, characterized in that, after performing the SCTP congestion control process, comprising: The CPU occupancy rate for processing SCTP signaling is less than the first threshold, and system congestion is relieved. 14. The device according to claim 12, characterized in that, after performing the SCTP congestion control process, comprising: The SCTP sending buffer occupancy rate is less than the third threshold, and the system congestion is relieved. 15. A device, characterized in that it comprises: The interface is used for signaling interaction between the base station and the core network or between base stations; Memory for storing executable program code and/or data. a processor for calling program code stored in memory to: Get the SCTP resource status of the Stream Control Transmission Protocol; Judging whether the SCTP resource condition satisfies the congestion judging condition; When the SCTP resource status satisfies the congestion judging condition, perform SCTP congestion control processing. 16. The device according to claim 15, wherein the SCTP resource status comprises: CPU occupancy of the central processing unit processing SCTP signaling and the number of SCTP signaling messages processed. 17. The device according to claim 15 or 16, wherein the congestion judging conditions include: The CPU occupancy rate for processing SCTP signaling is greater than the first threshold and the number of SCTP signaling processing is greater than the second threshold. 18. The device according to any one of claims 15-17, wherein the SCTP congestion control process comprises: Construct the SCTP congestion state indication information, the application protocol (S1-ApplicationProtocol, S1-AP) layer of S1 reduces the service request according to the SCTP congestion state indication information, and the S1-AP layer includes the S1-AP layer of the local equipment or the pair The S1-AP layer of the end device. 19. The device according to claim 15, wherein the SCTP resource status includes an SCTP sending buffer occupancy rate; and the congestion judging condition includes that the SCTP sending buffer occupancy rate is greater than a third threshold. 20. The device according to claim 18, characterized in that, after performing the SCTP congestion control process, comprising: The CPU occupancy rate for processing SCTP signaling is less than the first threshold, and system congestion is relieved. 21. The device according to claim 19, characterized in that, after performing the SCTP congestion control process, comprising: The SCTP sending buffer occupancy rate is less than the third threshold, and the system congestion is relieved.