WO2006056123A1 - Procede de traitement du contexte de retard dans la passerelle media - Google Patents

Procede de traitement du contexte de retard dans la passerelle media Download PDF

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Publication number
WO2006056123A1
WO2006056123A1 PCT/CN2005/001920 CN2005001920W WO2006056123A1 WO 2006056123 A1 WO2006056123 A1 WO 2006056123A1 CN 2005001920 W CN2005001920 W CN 2005001920W WO 2006056123 A1 WO2006056123 A1 WO 2006056123A1
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WO
WIPO (PCT)
Prior art keywords
context
media gateway
time
access
descriptor
Prior art date
Application number
PCT/CN2005/001920
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English (en)
Chinese (zh)
Inventor
Xin Fang
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2006056123A1 publication Critical patent/WO2006056123A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/125—Details of gateway equipment
    • H04M7/1255—Details of gateway equipment where the switching fabric and the switching logic are decomposed such as in Media Gateway Control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0852—Delays
    • H04L43/0858—One way delays

Definitions

  • the present invention relates to network communication technologies, and more particularly to a method for processing a lingering context in a media gateway. Background of the invention
  • the Gateway Control Protocol (H.248 protocol) is a communication protocol between the bearer layer and the control layer, and is suitable for systems in which the bearer and the control phase are separated in the communication field.
  • the H.248 protocol is widely used.
  • the "endpoint” is regarded as the body of the bearer layer, that is, the endpoint is a foreign bearer of the media gateway.
  • the endpoint includes a TDM endpoint, an ATM endpoint, an IP endpoint, and the like.
  • the association between endpoints is represented by a "Context", such as a context that can represent a topological relationship between endpoints, or media mix/swap parameters.
  • the Media Gateway Controller and Media Gateway are two separate devices.
  • the media gateway controller implements its own control over the services on the media gateway by operating commands for the endpoints and the context.
  • the following system architecture has the following problems: In the media gateway controller failure, it leads to finding a media gateway. When the context information is lost, the media gateway controller cannot issue a context reclaim message for the context, informing the media gateway to reclaim the context, thereby causing the context to stay on the media gateway.
  • the recycling context refers to the release of the context. This kind of context retention makes resources such as endpoints corresponding to the context long-term occupied and cannot be released. If context persistence is increasing Plus, it will threaten the normal operation of the communication system. .
  • the media gateway automatically cleans up the context that is stuck in itself for a long time. Specifically, the media gateway starts a timer, and checks all the contexts saved by the media at a fixed time. If the lifetime ⁇ 1 of a certain context is found to exceed the system configuration time, the context is automatically reclaimed, and the corresponding context is released. Endpoints and intermediate resources, etc.
  • the lifetime of the context ⁇ 1 refers to the difference between the current time T and the establishment time T1 of the context.
  • Figure 1 shows the media gateway cleaning process for the linguistic context, including the following steps: Step 101: The media gateway determines whether the lifetime of a certain context ⁇ 1 is greater than the system configuration time. If yes, step 102 is performed; otherwise, step 103 is performed.
  • Step 102 The media gateway reclaims the context and releases all system resources it occupies.
  • Step 103 The media gateway performs a null operation on the context to keep the context in the current use state.
  • the media gateway may, in some cases, misinterpret the normal service call because the necessary information exchange between the media gateway and the media gateway controller is not performed.
  • the lifetime of the context is slightly longer than that of the normal service. If the lifetime of the service exceeds the system configuration time, it will affect the normal development of the leased line service and reduce the system's service quality. If the system configuration time is set longer in order to take care of the long-term online service, it will reduce the recovery speed of the legacy gateway on the media gateway, resulting in idle resources and waste.
  • the main purpose of the present invention is to provide a media gateway that stays up and down.
  • the processing method of the text can avoid erroneously interrupting the normal call on the one hand, and release the lingering context in the media gateway in time on the other hand, thereby saving system resources.
  • a method for processing a lingering context in a media gateway comprising: after receiving a context access request sent by a media gateway controller, the media gateway records the media gateway The access time of the controller to the context; the media gateway finds the stagnant context based on the access time of the context and reclaims the stagnant context.
  • the context access request includes a modify operation instruction and an audit operation instruction.
  • the modification operation instruction carries a descriptor, and after receiving the modification operation instruction, the media gateway performs a modification operation corresponding to the descriptor.
  • the descriptor is a null descriptor, and the media gateway maintains the current state of the context based on the null descriptor.
  • the media gateway controller issues a context access request during each access period; or the media gateway controller issues a context access request in real time.
  • the access period is arbitrarily set according to actual needs, or is set according to the context average generation time.
  • the access period is set to be greater than the context average generation time.
  • the media gateway presets the judgment standard time, and the method for the media gateway to find the retained context is:
  • the media gateway subtracts the current time from the last access time of the context, obtains the access time difference of the context, and compares the access time difference with the judgment standard time. If the access time difference exceeds the judgment standard time, the media gateway determines that the context is stagnant. Context.
  • the judging standard time is arbitrarily set according to actual needs, or is set to be larger than an access period of the media gateway controller.
  • the media gateway performs a lookup of the retention context in each detection cycle; or, the media gateway searches for the retention context in real time.
  • the detection period is arbitrarily set according to actual needs, or set according to the context average generation time.
  • the method for recovering the retention context is: the media gateway releases the system resources occupied by the context.
  • the processing method of the lingering context in the media gateway of the present invention introduces a resource reconciliation mechanism between the media gateway controller and the media gateway, and the media gateway controller periodically and the media for the currently surviving context.
  • the gateway communicates.
  • the media gateway compares the current time T with the time T2 when the media gateway controller last accessed the context. If the difference ⁇ 2 is greater than the "judgment standard time", the media gateway reclaims the context, otherwise the existing context of the context is maintained. The usage status is unchanged.
  • the above method can not only enable the media gateway to recover its own retention context in time, but also save system resources. It also ensures the security of the bearer resources and the codec resources on the media gateway, so that the normal services on the media gateway are not abnormal. Interrupted. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a flow chart of cleaning a linguistic context of a media gateway in the prior art
  • FIG. 2 is a process for processing a linguistic context in a media gateway according to a preferred embodiment of the present invention. Mode for carrying out the invention
  • the processing media gateway is stuck on
  • the method below includes the following steps:
  • Step 201 The media gateway controller sends a context access request to the media gateway for the currently surviving context every "access period".
  • the media gateway controller can periodically access these contexts to the media gateway.
  • the access of the media gateway controller to the context includes any operation that does not affect the service corresponding to the context. For example: Modify any endpoint in the context, or perform audit operations on any endpoint in the context.
  • the audit operation is performed to query the status of the media gateway and the status of each context, so as to understand the status of each endpoint of the context in the media gateway, and the relationship between the endpoints.
  • the media gateway controller When the media gateway controller needs to perform the modification operation, it will issue a modification operation instruction, and inform the media gateway through the descriptor carried in the instruction, and specifically what kind of modification is to be made. For example, if the descriptor carried in the modification operation instruction is a null descriptor, it means that the media gateway controller issues an empty modification operation instruction, and the instruction does not need to change the state of the accessed context, that is, the media gateway. The context remains the same.
  • the "access period” of the media gateway controller to the media gateway can be set to any value as needed.
  • the "access period” is set with reference to the average lifetime of the media gateway context, wherein the average lifetime of the context is a statistical value of the system for all services, and is generally obtained from empirical data of previous services.
  • the "access period” can also be set and adjusted according to the network communication environment.
  • the "access period” is set in multiples of the average lifetime of the media gateway context, such that the “access period” is greater than the average lifetime of the context.
  • the “access period” is set to 10 times the average survival time, if the average survival time is 1 minute based on the previous statistics, the "access period” of the media gateway controller is 10 minutes left. Right.
  • the "access period” is set within 8-12 times of the average survival time, and the system adjusts the "access period".
  • the network resources are tight, set the "access period, which is about 8 times; when the network resources are idle, set the "access period,” to about 12 times.
  • the media gateway controller may also issue a context access request in real time, or issue the access request as needed, and details are not described herein. .
  • Step 202 After receiving the context access request sent by the media gateway controller, the media gateway records the current access time.
  • the context access request includes a modification operation instruction and an audit operation instruction, etc., and such instructions do not affect the service on the media gateway. After receiving the above instruction, the media gateway will record the time of this operation even if it is an empty modification operation instruction.
  • Step 203 The media gateway checks all the contexts according to the "detection period" timing, recovers the context in which the access time difference ⁇ 2 exceeds the "judgment standard time", and releases the system resources occupied by the context.
  • the media gateway compares the current time T with the time T2 of the media gateway controller's last access context every time the "detection period”, and obtains the access time difference ⁇ 2. If ⁇ 2 exceeds the "judgment standard time", the context is long. If it is not accessed by the media gateway controller and belongs to the stuck context, the media gateway reclaims the context and releases the system resources it occupies.
  • the media gateway maintains the state of the context and continues to perform related services for the context.
  • the “detection period” can be set to an arbitrary value as needed.
  • the system sets the “detection period” according to the load level of the media gateway. For example, the “detection period” is set to about 20 times the context average survival time, or the “detection period” is set within the range of 18-22 times the average lifetime of the context.
  • the “judgment standard time” may be set to an arbitrary value as needed. In general, the “Judgement Standard Time” is set to be greater than the "Access Period” of the Media Gateway Controller. In this embodiment, the “Judgement Standard Time” can be set within 2-5 times of the "Access Period”. If the "access period” of the media gateway controller is 10 minutes, the "judgment standard time” on the media gateway can be set to about 30 minutes.
  • the "Judgement Standard Time” can also be set directly with reference to the average lifetime of the media gateway context. For example, set the “Judgement Standard Time” to about 30 times the average survival time, or set the “Judgement Standard Time” within the range of 26-34 times the average survival time.
  • the media gateway can also check all contexts in real time, or trigger its own check of the context as needed, and will not go into details here.
  • the processing method of the lingering context in the media gateway of the present invention is that the media gateway controller periodically communicates with the media gateway for the currently surviving context, and the media gateway exceeds the access time difference by more than Context recovery for standard time.
  • the method can avoid erroneously interrupting the normal call, and on the other hand, can release the lingering context in the media gateway in time, thereby saving system resources.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé de traitement du contexte de retard dans la passerelle média. Le procédé est mis en oeuvre comme suit: après réception de la demande d'accès au contexte émanant du contrôleur de passerelle média, ce dernier enregistre son temps d'accès au contexte; le contrôleur de passerelle média consulte le contexte de retard selon le temps d'accès du contexte et corrige ledit contexte de retard. Selon le procédé de l'invention, le contrôleur de passerelle média communique avec la passerelle média périodiquement pour le contexte actif courant, et la passerelle média corrige le contexte dont la différence de temps d'accès se situe au-delà du 'temps normal déterminé'. Le procédé de l'invention peut, d'une part, éviter une interruption de la communication normale et, d'autre part, libérer immédiatement le contexte de retard dans la passerelle média. La source du système est par conséquent sauvegardée.
PCT/CN2005/001920 2004-11-26 2005-11-15 Procede de traitement du contexte de retard dans la passerelle media WO2006056123A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200410091770 CN1780229A (zh) 2004-11-26 2004-11-26 一种解决媒体网关滞留上下文的方法
CN200410091770.8 2004-11-26

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WO2006056123A1 true WO2006056123A1 (fr) 2006-06-01

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN116016442A (zh) * 2022-12-29 2023-04-25 武汉绿色网络信息服务有限责任公司 ip地址资源管理方法、云网关、电子设备及存储介质

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CN101237361B (zh) * 2007-01-31 2011-01-05 中兴通讯股份有限公司 一种无线网络控制器与b节点的通信上下文防不一致方法
CN101330478B (zh) * 2007-06-25 2011-04-20 中兴通讯股份有限公司 媒体网关控制器控制媒体网关电路资源抢占的方法
CN101159955B (zh) * 2007-10-19 2010-12-08 中兴通讯股份有限公司 基于媒体网关控制协议网络的服务质量测量方法及系统

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WO2003024052A1 (fr) * 2001-09-06 2003-03-20 Telefonaktiebolaget Lm Ericsson (Publ) Noeud de commutation decompose et procede de fonctionnement associe
CN1509031A (zh) * 2002-12-19 2004-06-30 华为技术有限公司 媒体网关控制器和媒体网关之间的交互方法
CN1518305A (zh) * 2003-01-28 2004-08-04 华为技术有限公司 传送网关上下文中端点的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003024052A1 (fr) * 2001-09-06 2003-03-20 Telefonaktiebolaget Lm Ericsson (Publ) Noeud de commutation decompose et procede de fonctionnement associe
CN1509031A (zh) * 2002-12-19 2004-06-30 华为技术有限公司 媒体网关控制器和媒体网关之间的交互方法
CN1518305A (zh) * 2003-01-28 2004-08-04 华为技术有限公司 传送网关上下文中端点的方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116016442A (zh) * 2022-12-29 2023-04-25 武汉绿色网络信息服务有限责任公司 ip地址资源管理方法、云网关、电子设备及存储介质

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