WO2005064960A1 - Procede de reduction de la surcharge des systemes a liaisons de signaux par tronc commun - Google Patents

Procede de reduction de la surcharge des systemes a liaisons de signaux par tronc commun Download PDF

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Publication number
WO2005064960A1
WO2005064960A1 PCT/CN2003/001136 CN0301136W WO2005064960A1 WO 2005064960 A1 WO2005064960 A1 WO 2005064960A1 CN 0301136 W CN0301136 W CN 0301136W WO 2005064960 A1 WO2005064960 A1 WO 2005064960A1
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WO
WIPO (PCT)
Prior art keywords
overload
message
message queue
processing process
service processing
Prior art date
Application number
PCT/CN2003/001136
Other languages
English (en)
Chinese (zh)
Inventor
Boyong Guo
Zhimin Wang
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Priority to PCT/CN2003/001136 priority Critical patent/WO2005064960A1/fr
Priority to AU2003296215A priority patent/AU2003296215A1/en
Priority to CNB2003801108297A priority patent/CN100429948C/zh
Publication of WO2005064960A1 publication Critical patent/WO2005064960A1/fr
Priority to NO20063480A priority patent/NO336310B1/no

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion

Definitions

  • the present invention relates to a method for controlling overload of a common channel system's traffic during a service processing process in a communication system, and in particular, to a method for controlling service access of a common signaling link system and a method for controlling overload of a current traffic.
  • the local signaling message is generated by the service layer and transmitted through the link layer.
  • the peer signaling message is first received by the link layer and then transmitted to the service layer for processing.
  • there is a peer confirmation process After a certain number of local order messages are sent to the peer, the peer needs to receive the confirmation message before sending other signaling messages to it, otherwise it cannot Continue sending.
  • the signaling messages are easy to accumulate locally. When the accumulation of signaling messages reaches a certain level, it will cause system error.
  • a method for overload detection and control of a service control point (SCP) is proposed in U.S. Patent No. 6510214:
  • the overload control system estimates the degree of overload through the latency of the logical service gun switch in the service control point and the depth of the stack
  • the transaction processing application part (TCAP) controls service access according to the degree of overload.
  • the detection method used in the US Patent No. 6510214 It is an absolute quantity, and the system load is already heavy when overload occurs, so the processing method adopted is to discard the newly arrived services after entering the overload state. Summary of the invention
  • An object of the present invention is to provide an overload control method of a common signaling link system, so as to notify a service processing process of a real-time signaling link overload situation by monitoring a signaling message queue waiting to be processed at a link layer in real time,
  • the service layer controls the number of access to new services to control the flow of the signaling link to solve the problem of frequent disconnection of the signaling link, and at the same time to solve the problem of large and unstable fluctuations in service processing traffic to ensure the reliable operation of the system .
  • An overload control method for a common signaling link system includes: the link control process periodically detects the number of unprocessed signaling messages in a message queue, and determines whether the number of unprocessed signaling messages exceeds an overload start threshold; The judgment is that the number of unprocessed signaling messages exceeds an overload start threshold, and by sending a message to a service processing process, the number of new services accessed by the service processing process is dynamically controlled by the link processing process.
  • the step of the link control process dynamically controlling the number of new services accessed by the service processing process includes: repeatedly performing the following steps 1 ⁇ (ii) at a predetermined time interval, until the number of signaling messages in the message queue Below the overload recovery threshold: (i) determining whether the number of signaling messages of the message queue is lower than the overload recovery threshold, and if the number of signaling messages of the message queue is lower than the overload recovery threshold, notifying the The service processing process system returns to a normal state; (ii) if the number of signaling messages of the message queue is higher than the overload recovery threshold, then the following steps are performed: judging whether the length of the message queue is currently greater than the predetermined time interval The length of the message queue, if the length of the current message queue is greater than the length of the message queue before the predetermined time interval, determining whether the number of signaling message increases of the message queue exceeds the overload increment threshold; The number of signaling messages exceeds the overload increment threshold, and the link control process sends an overload control message to The service processing
  • the step of the link control process dynamically controlling the number of new services accessed by the service processing process further includes: the service processing process receives a message from the link control process, and changes the number of accesses of new services Decrease or increase a predetermined number, and evenly distribute the calls allowed to the call access statistics window.
  • the step of notifying the service processing process system to return to a normal state further comprises: the service processing process gradually increasing the number of accesses to new services at a predetermined time interval.
  • the step of the link control process dynamically controlling the number of new services accessed by the service processing process further includes: the service processing process receives a message from the link control process, if the message is overload control Message, the service processing process reduces the number of accesses to m new services. If the message is an overload release message, the service processing process increases the number of accesses to n new services.
  • m and n are Natural number, and 111> 11.
  • the overload start threshold adopts the current signaling message quantity of the message queue to occupy 50% -70% of the size of the message queue storage area; the overload start threshold is set to the current signaling of the message queue.
  • the number of messages accounts for 60% of the size of the storage area of the message queue.
  • the overload recovery gate Pgen is close to and smaller than the overload start threshold.
  • the overload control method of the common channel system provided by the present invention implements overload control as early as possible according to the system's signaling processing capability and link transmission capability, and detects the change in the number of signaling messages in the signaling message queue in real time. Dynamically control the number of new service accesses. Through fast declines and slow rises, the access of new call services is evenly and randomly rejected, which basically solves the disconnection of the V5 signaling link between the BSS base station subsystem and the switch. The problem makes the call flow in the system stable and the signaling flow fluctuates little, thereby effectively reducing the impact on the switch and the V5 interface, and ensuring the stability and reliability of the system.
  • the method provided by the present invention is also applicable to the SS7 signal link system. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows a schematic structural diagram of a system environment in which an overload control method of a common signaling link system according to an embodiment of the present invention can be implemented
  • FIG. 2 shows a flowchart of an overload control method for a common signaling system according to the present invention
  • FIG. 3 shows a method for dynamically controlling access to a new service in the overload control method of a common signaling link system according to an embodiment of the present invention
  • FIG. 4 shows a test result of an overload condition of a common signaling link system to which the present invention is not applied
  • Fig. 5 shows the test results of the overload situation of the common signaling link system to which an embodiment of the present invention is applied.
  • FIG. 1 is a schematic structural diagram of a system environment in which an overload control method of a common channel system according to an embodiment of the present invention can be implemented.
  • the common signaling link system in this embodiment includes a link control process 101 and a service processing process 103, and the two implement mutual communication of communication messages between the two parties through the communication platform 105.
  • the service processing process 103 is at the service layer, which is used to control new service access and generate corresponding signaling messages
  • the link control process 101 is at the system's transmission layer, which is used to control local information processing.
  • the message is transmitted through the signaling layer 107 to the link layer of the peer system 109, and the link layer of the peer system 109 needs to perform a confirmation process on the received signaling message, and then transmits it to the service layer for deal with.
  • the transport layer of the local system After the transport layer of the local system sends a certain number of signaling messages to the peer, it needs to receive the confirmation message from the peer system 109 before sending other signaling messages to it, otherwise it cannot continue to send.
  • the signaling messages are easily accumulated at the local transport layer.
  • FIG. 2 shows a flowchart of an overload control method of a common channel system according to the present invention.
  • the link control process monitors the number of unprocessed signaling messages.
  • the link control process determines whether the number of unprocessed signaling messages exceeds the overload start threshold, and if it exceeds, sends an overload control message to the service processing process.
  • the message buffer area for unprocessed signaling messages is usually very large in the system, which is much larger than the signaling processing capacity of the system and the transmission capacity of the link, so according to the signaling processing of the system Overload control should be implemented as soon as possible and the transmission capacity of the link, so that the system can fully control the link status and service access.
  • the overload start threshold is set to 60% of the size of the message queue storage area for the current number of signaling messages of the message queue.
  • each time the service processing process receives an overload control message it reduces the number of accesses to two new services.
  • the method of randomly denying access to some new services is adopted instead of discarding the generated signaling messages or releasing the established services to implement the overload control.
  • step 205 the link control process dynamically controls the number of new services accessed by the service processing process. Specifically, the process of the link control process dynamically controlling the number of new services accessed by the service processing process is shown in Figure 3.
  • FIG. 3 shows a flowchart of a process for dynamically controlling the number of accesses of new services in an overload control method of a common signaling link system according to an embodiment of the present invention.
  • the process of the link control process dynamically controlling the number of new services accessed by the service processing process is repeatedly performed at a certain time interval until the number of signaling messages in the message queue is less than or equal to An overload recovery threshold.
  • the link control process starts an overload monitoring timer to set The interval at which the message queue is detected at regular intervals.
  • the time interval for timing detection should be as small as possible to avoid detection interval time. Too long to generate more new signaling messages.
  • the time interval is determined by the time interval of the operating system scheduling process, and is generally 20 seconds.
  • step 302 after the overload monitoring timer expires, the link control process detects the number of signaling messages in the message queue, and determines whether the number of signaling messages in the message queue is lower than or equal to the overload recovery threshold. If the number of signaling messages in the message queue is lower than or equal to the overload recovery threshold, the process proceeds to step 303, otherwise, step 305 is performed.
  • the overload recovery threshold is set to be close to but less than the overload start threshold, so that If there is a large amount of signaling information traffic after the overload state is released, the system can detect the new overload state as soon as possible and control it early.
  • the link control process notifies the service processing process to enter the overload recovery phase.
  • the service processing process starts to recover services and sets a service recovery timer.
  • the service recovery timer is used to gradually increase the number of new service accesses until the system returns to the normal state.
  • a service recovery timer can be used to control the time interval for the service processing process to recover the number of new service accesses, for example, 2 seconds, and a fine-tuning method is adopted, and the number of new service accesses each time cannot be too large. For example, if the number of accesses of a new service is increased one at a time to prevent the system from fluctuating too much, until the system returns to a normal state or the service processing process receives an overload control message again, the service recovery phase is stopped.
  • step 305 the link control process restarts the overload monitoring timer.
  • step 306 the chain process determines that the number of signaling messages in the message queue is greater than the overload start threshold, and determines whether the length of the current message queue is smaller than the length of the message queue detected after the last overload monitoring timer expires. If yes, the process proceeds to step 307, otherwise, step 309 is performed.
  • the link control process further determines whether the reduction of the number of signaling messages in the message queue is higher than a predetermined overload reduction threshold within a period specified by the overload monitoring timer. If yes, the process proceeds to step 308, and the number of accesses to the new service is increased; otherwise, the process proceeds to step 311.
  • the overload reduction threshold can be based on the size of the storage area of the message queue and the system. It depends on the service access and link control capabilities. In this embodiment, the overload reduction gate is limited to 45.
  • step 308 the link control process sends an overload release message to the service processing process.
  • the service processing process increases the number of new service accesses and resets the overload recovery timer.
  • the service processing process adds one new k service access number. Then, the process proceeds to step 311.
  • the link control process further determines whether the increase in the number of signaling messages in the message queue is higher than a predetermined overload increment threshold within the time id segment specified by the overload monitoring timer. If yes, the process proceeds to step 310, which further reduces the number of new service accesses, and resets the overload recovery timer; otherwise, the process proceeds to step 311.
  • the overload incremental threshold may be determined according to the size of the storage area of the message queue and the system's service access and link control capabilities. In this embodiment, the overload incremental threshold is limited to 40.
  • step 310 the chain process sends an overload control message to the service processing process.
  • the service processing process further reduces the number of new service accesses.
  • the service processing process reduces the number of accesses of two new services after receiving the overload control message. Then, the process proceeds to step 311.
  • a fine-tuning method is adopted for the overload to ensure that the service volume of each change is not too high, so the system reduces the speed of new service access faster than the speed of increasing new service access.
  • step 311 the process proceeds to step 302, repeating the steps described above, and continuing to detect the number of signaling messages in the timed message queue and dynamically controlling the number of new services accessed by the service processing process until the system returns to a normal state .
  • the service processing process uniformly restricts the access of new calls according to the overload control and overload release messages sent by the link control process.
  • the method for the service processing process to control the access of new calls is as follows:
  • the service processing process sets a statistical window according to the overload control service access ratio, which is generally set to 32, that is, each 32 calls is used as a cycle to count the number of incoming calls. , Set the number of calls allowed in the current statistics window, distinguish whether the currently newly called call numbers are allowed to be accessed, and evenly distribute the allowed call numbers into the statistics window.
  • FIG. 4 shows the test results of the overload condition of the common signaling link system to which the present invention is not applied.
  • a large-traffic simulation program is used for call testing, and the front desk controls continuous calls, simulating an initial call of 240 channels, and a total of 480 channels of initial calls plus called parties.
  • the call duration is 6S and the call interval is 4S. It can be seen that the traffic fluctuation of the common signaling link system without the embodiment of the present invention is very large, and the interface is easily broken due to system overload and congestion.
  • FIG. 5 shows a test result of an overload condition of a common signaling link system to which an embodiment of the present invention is applied.
  • a large-traffic simulation program is used to perform a call test.
  • the front desk controls continuous calls, simulating 240 calls, and 480 calls plus calls.
  • the call duration is 2S, and the call interval is 4S. It can be seen that the traffic fluctuation of the shared signaling system using one embodiment of the present invention is small, and the system traffic is stable.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

La présente invention concerne un procédé de réduction de la surcharge des systèmes à liaisons de signaux par tronc commun. A cet effet, on commence par exécuter une fonction 'Link Control Course Time Detect' portant sur le nombre de messages de signaux non-traités dans la séquence des messages. On vérifie ensuite si ce nombre dépasse le seuil de débit de surcharge. Si c'est le cas, il y a exécution d'une fonction 'Link Control Course Dynamic Control' portant sur le nombre de 'Service Process Course Accessed New Service', par transmission de message au 'Service Process Course'.
PCT/CN2003/001136 2003-12-29 2003-12-29 Procede de reduction de la surcharge des systemes a liaisons de signaux par tronc commun WO2005064960A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/CN2003/001136 WO2005064960A1 (fr) 2003-12-29 2003-12-29 Procede de reduction de la surcharge des systemes a liaisons de signaux par tronc commun
AU2003296215A AU2003296215A1 (en) 2003-12-29 2003-12-29 A common path signal link system overload control method
CNB2003801108297A CN100429948C (zh) 2003-12-29 2003-12-29 共路信令链路系统的过载控制方法
NO20063480A NO336310B1 (no) 2003-12-29 2006-07-28 Fremgangmsåte for overbelastningskontroll i et felleskanalsignaleringslinksystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2003/001136 WO2005064960A1 (fr) 2003-12-29 2003-12-29 Procede de reduction de la surcharge des systemes a liaisons de signaux par tronc commun

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Cited By (2)

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CN104301939A (zh) * 2013-07-19 2015-01-21 中国移动通信集团广东有限公司 一种控制方法、装置及网络侧设备
CN102045654B (zh) * 2009-10-10 2015-01-28 上海中兴通讯技术有限责任公司 异步socket通讯方法及采用该方法的手机定位系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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CN101583148B (zh) * 2008-05-16 2012-07-25 华为技术有限公司 一种通信设备过载处理方法及装置
CN111641945A (zh) * 2020-04-24 2020-09-08 苏州华普物联科技有限公司 一种低功耗自组织无线传感网络通信方法

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US5835490A (en) * 1995-08-21 1998-11-10 Electronics And Telecommunications Research Institute Overload control method using call control process load ratio of CDMA mobile system
CN1234704A (zh) * 1998-03-26 1999-11-10 日本电气株式会社 扩频通信系统及其过载控制方法
KR20020046627A (ko) * 2000-12-15 2002-06-21 박종섭 이동통신 기지국/제어국 시스템에서의 과부하 제어 장치및 방법

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CN1459985A (zh) * 2002-05-21 2003-12-03 深圳市中兴通讯股份有限公司 一种gsm系统中无线业务流量控制方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5835490A (en) * 1995-08-21 1998-11-10 Electronics And Telecommunications Research Institute Overload control method using call control process load ratio of CDMA mobile system
CN1234704A (zh) * 1998-03-26 1999-11-10 日本电气株式会社 扩频通信系统及其过载控制方法
KR20020046627A (ko) * 2000-12-15 2002-06-21 박종섭 이동통신 기지국/제어국 시스템에서의 과부하 제어 장치및 방법

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102045654B (zh) * 2009-10-10 2015-01-28 上海中兴通讯技术有限责任公司 异步socket通讯方法及采用该方法的手机定位系统
CN104301939A (zh) * 2013-07-19 2015-01-21 中国移动通信集团广东有限公司 一种控制方法、装置及网络侧设备

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Publication number Publication date
NO336310B1 (no) 2015-07-27
CN100429948C (zh) 2008-10-29
NO20063480L (no) 2006-07-28
CN1879436A (zh) 2006-12-13
AU2003296215A1 (en) 2005-07-21

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