WO2015192518A1 - Error detection method, apparatus and system for potn - Google Patents

Error detection method, apparatus and system for potn Download PDF

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WO2015192518A1
WO2015192518A1 PCT/CN2014/087117 CN2014087117W WO2015192518A1 WO 2015192518 A1 WO2015192518 A1 WO 2015192518A1 CN 2014087117 W CN2014087117 W CN 2014087117W WO 2015192518 A1 WO2015192518 A1 WO 2015192518A1
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node
alarm
error
potn
packet
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PCT/CN2014/087117
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French (fr)
Chinese (zh)
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温建中
詹双平
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中兴通讯股份有限公司
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Publication of WO2015192518A1 publication Critical patent/WO2015192518A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance or administration or management of packet switching networks

Abstract

Disclosed are an error detection method, apparatus and system for a POTN. The method comprises: an intermediate node in a POTN determines whether an error threshold-crossing has occurred, the intermediate node being connected to another intermediate node through an OTN link; and the intermediate node sends, according to a determining result, an alarm packet to a downstream node corresponding to an affected service. By means of the present invention, the problem of low accuracy of error detection in a POTN in the prior art is solved, more accurate detection of performance degradation and more reliable protection switching in the POTN can be achieved, and the reliability of a PTN service can be improved.

Description

POTN的误码检测方法、装置及系统POTN error detection method, device and system 技术领域Technical field
本发明涉及通信领域,具体而言,涉及一种分组光传送网(Package Optical Transport Network,简称为POTN)的误码检测方法、装置及系统。The present invention relates to the field of communications, and in particular to a packet optical transmission network (POTN) error detection method, apparatus, and system.
背景技术Background technique
目前电信运营商传输网中采用分组传送网(Package Transport Network,简称为PTN)Over光传送网(Optical Transport Network,简称为OTN)的组网较为常见,其中PTN用于业务接入,提供端到端的业务和保护,OTN主要提供大容量和长距离传输。随着电信运营商对网络可靠性要求的提高,需要网络中在出现链路性能劣化时也能实现业务保护,由于端到端的保护是由PTN完成的,此时的性能劣化(Signal Degraded,简称为SD)保护由PTN设备实现。OTN虽然也可提供SD保护,但只能是一种局部保护,并且网络中PTN与OTN保护叠加会带来网络保护结构复杂等其它问题,一般不会在网络中部署。At present, the network of the carrier transport network (Package Transport Network, PTN) Over Optical Transport Network (OTN) is common in the transport network of the telecom carrier. The PTN is used for service access and provides end-to-end access. End of service and protection, OTN mainly provides large capacity and long distance transmission. As the service provider's requirements for network reliability are improved, it is necessary to implement service protection in the case of link performance degradation in the network. Since end-to-end protection is performed by the PTN, the performance degradation at this time (Signal Degraded, referred to as The protection for SD) is implemented by the PTN device. Although OTN can also provide SD protection, it can only be a kind of local protection, and the PTN and OTN protection overlay in the network will bring other problems such as complex network protection structure, and generally will not be deployed in the network.
PTN是基于包交换的网络,其SD保护是基于丢包检测来判断性能劣化程度的,其丢包检测可以基于PTN的运营管理和维护(Operations,Administration and Maintenance,简称为OAM)机制(如G.8113.1/G.8113.2),或者以太网媒体访问控制(Media Access Control,简称为MAC)层的FCS:帧检验序列(Frame Check Sequence,简称为FCS)检验机制。由于丢包检测机制与业务流量、链路发包速率、业务包长等都存在一定关系,难以做到高精度的丢包率检测,比如在相同的业务流量情况下,业务包长越大,则每秒钟的发包数量就越少,丢包检测的精度就越低。通常在PTN的网络中可检测到的丢包率精度在10-3~10-6之间,这与同步数字体系(Synchronous Digital Hierarchy,简称为SDH)/OTN的网络存在较大差距(在SDH/OTN网络中,误码检测精度可达到10-9)。因此,在PTN与OTN融合的分组光传送网(POTN)的网络中,目前的误码检测精度较低。The PTN is a packet-switched network. The SD protection is based on packet loss detection to determine the degree of performance degradation. The packet loss detection can be based on the PTN operation management and maintenance (Operations, Administration and Maintenance, OAM for short) mechanism (such as G). .8113.1/G.8113.2), or FCS of the Ethernet Media Access Control (MAC) layer: Frame Check Sequence (FCS) verification mechanism. Because the packet loss detection mechanism has a certain relationship with service traffic, link packet transmission rate, and service packet length, it is difficult to achieve high-accuracy packet loss detection. For example, in the case of the same service traffic, the service packet length is larger. The smaller the number of packets sent per second, the lower the accuracy of packet loss detection. Generally, the packet loss rate that can be detected in the PTN network is between 10 -3 and 10 -6 , which is quite different from the Synchronous Digital Hierarchy (SDH)/OTN network (in SDH). In the /OTN network, the error detection accuracy can reach 10 -9 ). Therefore, in the network of a packet optical transport network (POTN) in which PTN and OTN are fused, the current error detection accuracy is low.
针对相关技术中POTN网络的误码检测精度较低的问题,目前尚未提出有效的解决方案。 Aiming at the problem that the error detection accuracy of the POTN network in the related art is low, an effective solution has not been proposed yet.
发明内容Summary of the invention
本发明实施例提供了一种POTN的误码检测方法、装置及系统,以至少解决相关技术中POTN网络的误码检测精度较低的问题。The embodiment of the invention provides a POTN error detection method, device and system, so as to at least solve the problem that the error detection precision of the POTN network in the related art is low.
根据本发明的一个实施例,提供了一种POTN的误码检测方法,包括:POTN网络的中间节点判断是否存在误码越限,其中,所述中间节点与另一中间节点通过光传送网OTN链路连接;所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文。According to an embodiment of the present invention, a POTN error detection method is provided, including: an intermediate node of a POTN network determines whether there is a bit error limit, wherein the intermediate node and another intermediate node pass an optical transport network OTN Linking the link; the intermediate node sends an alarm message to the downstream node corresponding to the affected service according to the judgment result.
POTN网络的中间节点判断是否存在误码越限包括:所述中间节点通过OTN误码检测技术判断是否存在误码越限。The intermediate node of the POTN network determines whether there is a bit error limit. The intermediate node determines whether there is a bit error limit through the OTN error detection technology.
所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文包括:所述中间节点根据判断结果向受影响的业务对应的下游节点发送分组传送网PTN网络的运营管理和维护OAM告警报文。The sending, by the intermediate node, the alarm message to the downstream node corresponding to the affected service according to the judgment result includes: the intermediate node sends the operation management and maintenance OAM of the packet transport network PTN network to the downstream node corresponding to the affected service according to the judgment result. Alarm packet.
在所述中间节点根据判断结果向受影响的业务对应的下游节点发送PTN网络的OAM告警报文之后,还包括:所述下游节点对所述OAM告警报文进行解析;所述下游节点根据解析结果和保护倒换规则确定是否执行倒换。And after the sending, by the intermediate node, the OAM alarm message of the PTN network to the downstream node corresponding to the affected service, the method further includes: the downstream node parsing the OAM alarm message; The result and the protection switching rule determine whether to perform the switching.
所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文包括:在所述判断结果为存在误码越限的情况下,所述中间节点向受影响的业务对应的下游节点发送设置为通知告警产生的告警报文;和/或,在所述判断结果为误码越限消失的情况下,所述中间节点向受影响的业务对应的下游节点发送设置为通知告警消失的告警报文。The sending, by the intermediate node, the alarm message to the downstream node corresponding to the affected service according to the judgment result includes: if the judgment result is that the error is exceeded, the intermediate node sends the downstream node corresponding to the affected service Sending an alarm message set to notify the alarm of the alarm; and/or, if the result of the judgment is that the error exceeds the limit, the intermediate node sends the notification to the downstream node corresponding to the affected service to notify that the alarm disappears. Alarm packet.
所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文包括:所述中间节点根据判断结果向受影响的业务对应的下游节点发送携带远端误码越限指示FEI的报文,其中,所述远端误码越限指示设置为指示所述告警报文是用于通知告警产生的告警报文或是用于通知告警消失的告警报文。The sending, by the intermediate node, the alarm message to the downstream node corresponding to the affected service according to the judgment result, the intermediate node sending, according to the judgment result, the report carrying the remote error overrun indication FEI to the downstream node corresponding to the affected service The remote error indication indication is set to indicate that the alarm message is an alarm message for notifying the alarm or an alarm message for notifying that the alarm disappears.
根据本发明的另一实施例,提供了一种POTN的误码检测装置,位于POTN网络的中间节点中,其中,所述中间节点与另一中间节点通过光传送网OTN链路连接,所述装置包括:判断模块,设置为判断是否存在误码越限;发送模块,设置为根据判断结果向受影响的业务对应的下游节点发送告警报文。 According to another embodiment of the present invention, there is provided a POTN error detecting apparatus, which is located in an intermediate node of a POTN network, wherein the intermediate node is connected to another intermediate node through an optical transport network OTN link, The device includes: a judging module, configured to determine whether there is a bit error limit; the sending module is configured to send an alarm message to the downstream node corresponding to the affected service according to the determining result.
所述判断模块包括:判断单元,设置为通过OTN误码检测技术判断是否存在误码越限。The determining module includes: a determining unit configured to determine whether there is a bit error limit by using an OTN error detecting technology.
所述发送模块包括:第一发送单元,设置为根据判断结果向受影响的业务对应的下游节点发送分组传送网PTN网络的运营管理和维护OAM告警报文。The sending module includes: a first sending unit, configured to send, according to the determining result, an operation management and a maintenance OAM alarm message of the packet transport network PTN network to the downstream node corresponding to the affected service.
所述发送模块包括:第二发送单元,设置为在所述判断结果为存在误码越限的情况下,向受影响的业务对应的下游节点发送用于通知告警产生的告警报文;和/或,在所述判断结果为误码越限消失的情况下,向受影响的业务对应的下游节点发送用于通知告警消失的告警报文。The sending module includes: a second sending unit, configured to send, to the downstream node corresponding to the affected service, an alarm message for notifying the alarm when the result of the determination is that the error is exceeded; and Or, in the case that the result of the determination is that the error exceeds the limit, the downstream node corresponding to the affected service is sent an alarm message for notifying that the alarm disappears.
所述发送模块包括:第三发送单元,设置为根据判断结果向受影响的业务对应的下游节点发送携带远端误码越限指示FEI的报文,其中,所述远端误码越限指示设置为指示所述告警报文是用于通知告警产生的告警报文或是用于通知告警消失的告警报文。The sending module includes: a third sending unit, configured to send, according to the determining result, a packet carrying a far-end error over-limit indication FEI to a downstream node corresponding to the affected service, where the remote error exceeds the limit indication It is set to indicate that the alarm message is an alarm message for notifying the alarm or an alarm message for notifying that the alarm disappears.
根据本发明的另一实施例,还提供了一种POTN的误码检测系统,包括上述POTN的误码检测装置,还包括下游节点,其中,所述下游节点包括:解析模块,设置为在告警报文为OAM告警报文的情况下,对所述OAM告警报文进行解析;确定模块,设置为根据解析结果和保护倒换规则确定是否执行倒换。According to another embodiment of the present invention, a POTN error detection system is provided, including the POTN error detection apparatus, further comprising a downstream node, wherein the downstream node comprises: a parsing module, configured to be in an alarm If the packet is an OAM alarm packet, the OAM alarm packet is parsed; and the determining module is configured to determine whether to perform the switching according to the parsing result and the protection switching rule.
通过本发明,采用POTN网络的中间节点判断是否存在误码越限,其中,上述中间节点与另一中间节点通过OTN链路连接;上述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文的方式,解决了相关技术中POTN网络的误码检测精度较低的问题,能够实现在POTN网络中更高精度的性能劣化检测和更可靠的保护倒换,提升PTN业务的可靠性。According to the present invention, the intermediate node of the POTN network is used to determine whether there is a bit error limit, wherein the intermediate node is connected to another intermediate node through an OTN link; and the intermediate node sends the downlink node corresponding to the affected service according to the judgment result. The method of the alarm packet solves the problem of low error detection accuracy of the POTN network in the related art, and can implement higher-precision performance degradation detection and more reliable protection switching in the POTN network, and improve the reliability of the PTN service.
附图说明DRAWINGS
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:
图1是根据本发明实施例的POTN的误码检测方法的流程图;1 is a flowchart of a method for detecting a bit error of a POTN according to an embodiment of the present invention;
图2是根据本发明实施例的POTN的误码检测装置的结构框图;2 is a block diagram showing the structure of a bit error detecting apparatus of a POTN according to an embodiment of the present invention;
图3是根据本发明实施例的POTN的误码检测系统的结构框图; 3 is a structural block diagram of a bit error detecting system of a POTN according to an embodiment of the present invention;
图4是根据本发明优选实施例的POTN网络保护组网示意图;4 is a schematic diagram of a POTN network protection networking according to a preferred embodiment of the present invention;
图5是根据本发明优选实施例的POTN网络保护的算法流程示意图;FIG. 5 is a schematic flowchart of an algorithm for POTN network protection according to a preferred embodiment of the present invention; FIG.
图6是根据本发明优选实施例的汇聚层采用POTN设备,汇聚节点间采用OTN连接的组网示意图;6 is a schematic diagram of a networking in which an aggregation layer adopts a POTN device and an OTN connection is used between aggregation nodes according to a preferred embodiment of the present invention;
图7是根据本发明实施例一的业务和OAM报文封装示意图;FIG. 7 is a schematic diagram of service and OAM packet encapsulation according to Embodiment 1 of the present invention; FIG.
图8是根据本发明实施例二的业务和OAM报文封装示意图。FIG. 8 is a schematic diagram of service and OAM packet encapsulation according to Embodiment 2 of the present invention.
具体实施方式detailed description
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
在本实施例中,提供了一种POTN的误码检测方法,图1是根据本发明实施例的POTN的误码检测方法的流程图,如图1所示,该方法包括如下步骤:In this embodiment, a POTN error detection method is provided. FIG. 1 is a flowchart of a POTN error detection method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:
步骤S102,POTN网络的中间节点判断是否存在误码越限,其中,上述中间节点与另一中间节点通过OTN链路连接;Step S102: The intermediate node of the POTN network determines whether there is a bit error limit, wherein the intermediate node is connected to another intermediate node by using an OTN link.
步骤S104,上述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文。Step S104: The intermediate node sends an alarm message to the downstream node corresponding to the affected service according to the determination result.
本实施例通过上述步骤,POTN网络的中间节点判断是否存在误码越限,并将判断结果通知给受影响的业务对应的下游节点,从而使得下游节点能够根据中间节点是否存在误码越限的情况,来酌情确定是否执行保护倒换,结合了误码越限以及PTN倒换处理的功能,解决了相关技术中POTN网络的误码检测精度较低的问题,能够实现在POTN网络中更高精度的性能劣化检测和更可靠的保护倒换,提升PTN业务的可靠性。In this embodiment, the intermediate node of the POTN network determines whether there is a bit error limit, and notifies the judgment result to the downstream node corresponding to the affected service, so that the downstream node can exceed the intermediate node according to whether the error occurs. In the case of discretion, whether to perform protection switching, combined with the function of error violation and PTN switching processing, solves the problem that the error detection accuracy of the POTN network in the related art is low, and can achieve higher precision in the POTN network. Performance degradation detection and more reliable protection switching to improve the reliability of PTN services.
优选地,POTN网络的中间节点可以通过OTN误码检测技术来判断是否存在误码越限。Preferably, the intermediate node of the POTN network can determine whether there is a bit error limit through the OTN error detection technology.
优选地,上述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文时,可以发送PTN网络的OAM告警报文。 Preferably, the intermediate node may send an OAM alarm message of the PTN network when the alarm message is sent to the downstream node corresponding to the affected service according to the determination result.
优选地,在上述中间节点向下游节点发送OAM告警报文之后,上述下游节点可以对上述OAM告警报文进行解析,然后根据解析结果和保护倒换规则确定是否执行倒换。Preferably, after the foregoing intermediate node sends an OAM alarm message to the downstream node, the downstream node may parse the OAM alarm message, and then determine whether to perform the switching according to the analysis result and the protection switching rule.
作为一个优选实施方式,上述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文的方式具体可以包括:在上述判断结果为存在误码越限的情况下,上述中间节点可以向受影响的业务对应的下游节点发送用于通知告警产生的告警报文;和/或,在上述判断结果为误码越限消失的情况下,上述中间节点可以向受影响的业务对应的下游节点发送用于通知告警消失的告警报文。As a preferred embodiment, the manner in which the foregoing intermediate node sends an alarm packet to the downstream node corresponding to the affected service according to the determination result may include: if the foregoing judgment result is that the error is exceeded, the intermediate node may The downstream node corresponding to the affected service sends an alarm message for notifying the alarm; and/or, in the case that the above judgment result is that the error exceeds the limit, the intermediate node may send the downstream node corresponding to the affected service. Send an alarm packet to notify the disappearance of the alarm.
优选地,上述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文时,可以在该告警报文中携带远端误码越限指示(Far-End Error Indication,简称为FEI)的报文,其中,上述远端误码越限指示设置为指示上述告警报文是用于通知告警产生的告警报文或是用于通知告警消失的告警报文。Preferably, the intermediate node sends an alarm message to the downstream node corresponding to the affected service according to the determination result, and may carry a Far-End Error Indication (FEI) in the alarm message. The packet is configured to indicate that the alarm message is an alarm message for notifying the alarm or an alarm message for notifying that the alarm is lost.
对应于上述方法,在本实施例中还提供了一种POTN的误码检测装置,位于POTN网络的中间节点中,其中,上述中间节点与另一中间节点通过OTN链路连接,该装置设置为实现上述实施例及优选实施方式,已经进行过说明的不再赘述。如以下所使用的,术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现,但是硬件,或者软件和硬件的组合的实现也是可能并被构想的。Corresponding to the above method, in the embodiment, a POTN error detecting device is further provided, which is located in an intermediate node of the POTN network, wherein the intermediate node is connected to another intermediate node through an OTN link, and the device is set to The above embodiments and preferred embodiments have been implemented, and the detailed description thereof has been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
图2是根据本发明实施例的POTN的误码检测装置的结构框图,如图2所示,该装置包括:判断模块22和发送模块24,下面对各个模块进行详细说明:2 is a structural block diagram of a bit error detecting apparatus of a POTN according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes: a determining module 22 and a transmitting module 24. The following describes each module in detail:
判断模块22,设置为判断是否存在误码越限;发送模块24,与判断模块22相连,设置为根据判断模块22的判断结果向受影响的业务对应的下游节点发送告警报文。The determining module 22 is configured to determine whether there is a fault limit. The sending module 24 is connected to the determining module 22, and is configured to send an alarm message to the downstream node corresponding to the affected service according to the determining result of the determining module 22.
优选地,上述判断模块22可以包括:判断单元222,设置为通过OTN误码检测技术判断是否存在误码越限。Preferably, the determining module 22 may include: a determining unit 222, configured to determine, by using an OTN error detection technology, whether there is a bit error limit.
优选地,上述发送模块24可以包括:第一发送单元242,设置为根据判断模块22的判断结果向受影响的业务对应的下游节点发送PTN网络的OAM告警报文。Preferably, the sending module 24 may include: a first sending unit 242, configured to send an OAM alarm message of the PTN network to the downstream node corresponding to the affected service according to the determining result of the determining module 22.
优选地,上述发送模块24还可以包括:第二发送单元244,设置为在判断模块22的上述判断结果为存在误码越限的情况下,向受影响的业务对应的下游节点发送用于 通知告警产生的告警报文;和/或,在上述判断结果为误码越限消失的情况下,向受影响的业务对应的下游节点发送用于通知告警消失的告警报文。Preferably, the sending module 24 may further include: a second sending unit 244, configured to send, to the downstream node corresponding to the affected service, that the result of the determining by the determining module 22 is that the error is exceeded. Notifying the alarm message generated by the alarm; and/or, in the case that the above-mentioned determination result is that the error exceeds the limit, the downstream node corresponding to the affected service sends an alarm message for notifying that the alarm disappears.
优选地,上述发送模块24还可以包括:第三发送单元246,设置为根据判断模块22的判断结果向受影响的业务对应的下游节点发送携带远端误码越限指示的报文,其中,上述远端误码越限指示设置为指示上述告警报文是用于通知告警产生的告警报文或是用于通知告警消失的告警报文。Preferably, the sending module 24 may further include: a third sending unit 246, configured to send, according to the determining result of the determining module 22, a packet carrying a remote error overrun indication to the downstream node corresponding to the affected service, where The remote error indication indication is set to indicate that the alarm message is an alarm message for notifying the alarm or an alarm message for notifying that the alarm disappears.
在本实施例中,还提供了一种POTN的误码检测系统,图3是根据本发明实施例的POTN的误码检测系统的结构框图,如图3所示,该系统包括上述如图2所示的POTN的误码检测装置20,还包括下游节点30,其中,上述下游节点30包括解析模块32和确定模块34:In this embodiment, a POTN error detection system is also provided. FIG. 3 is a structural block diagram of a POTN error detection system according to an embodiment of the present invention. As shown in FIG. 3, the system includes the above FIG. The illustrated error detection device 20 of the POTN further includes a downstream node 30, wherein the downstream node 30 includes a parsing module 32 and a determining module 34:
解析模块32,设置为在告警报文为OAM告警报文的情况下,对上述OAM告警报文进行解析;确定模块34,与解析模块32相连,设置为根据解析模块32的解析结果和保护倒换规则确定是否执行倒换。The parsing module 32 is configured to parse the OAM alarm message when the alarm message is an OAM alarm message, and the determining module 34 is connected to the parsing module 32 and configured to perform the analysis result and the protection switching according to the parsing module 32. The rule determines whether to perform a switchover.
下面结合优选实施例进行说明,以下优选实施例结合了上述实施例及其优选实施方式。The following description is made in conjunction with the preferred embodiments, and the following preferred embodiments incorporate the above-described embodiments and preferred embodiments thereof.
在以下优选实施例中,提出了一种PTN与OTN融合设备(通常称为POTN设备)的组网应用中,性能劣化(SD)保护功能的一种改进方法,具体而言,涉及POTN设备在PTN和OTN混合组网应用模式下,提高SD保护时的误码检测精度,使得SD保护更加精准可靠的一种方法。该方法在PTN和OTN融合设备(POTN设备)的组网中提供一种性能劣化的传递机制和保护触发机制,使得POTN网络中端到端的PTN保护可以实现高精度的误码检测和保护倒换。In the following preferred embodiments, an improved method for performance degradation (SD) protection function in a networking application of a PTN and OTN fusion device (commonly referred to as a POTN device) is proposed. Specifically, the POTN device is involved in In the PTN and OTN hybrid networking application mode, the error detection accuracy of SD protection is improved, making SD protection more accurate and reliable. The method provides a performance degradation transmission mechanism and a protection trigger mechanism in the networking of the PTN and the OTN convergence device (POTN device), so that the end-to-end PTN protection in the POTN network can implement high-accuracy error detection and protection switching.
本优选实施例的方法主要涉及三个模块:The method of the preferred embodiment mainly involves three modules:
误码检测模块(实现了上述判断模块22的功能):OTN接口的误码检测模块,该模块采用相关技术的OTN误码检测技术实现,可实现高精度的误码检测;The error detection module (implementing the function of the above-mentioned judging module 22): the error detection module of the OTN interface, the module is implemented by the OTN error detection technology of the related technology, and can realize high-accuracy error detection;
误码传递模块(实现了上述发送模块24的功能):将OTN接口检测出的误码越限告警产生的情况,通过该模块转化为PTN网络的OAM报文(即上述告警报文),通知PTN网络保护动作执行的节点,此处的OAM报文需要在原有PTN OAN机制上进行扩展; The error transmission module (implementing the function of the above-mentioned transmission module 24): the situation in which the error detection alarm generated by the OTN interface is generated, and the OAM message (ie, the above-mentioned alarm message) of the PTN network is converted into a notification by the module. The node that performs the PTN network protection action, where the OAM packet needs to be extended on the original PTN OAN mechanism;
误码处理模块(实现了上述解析模块32的功能):在PTN网络保护动作执行的节点,该模块接收到业务路径上POTN设备传递来的携带远端误码越限指示的OAM报文(即上述告警报文)后,将误码指示作为保护倒换触发条件之一通知保护倒换处理模块,由保护倒换处理模块判断是否需进行倒换;The error processing module (implementing the function of the parsing module 32): the node that performs the PTN network protection action, the module receives the OAM packet carrying the remote error indication indication transmitted by the POTN device on the service path (ie, After the alarm packet is sent, the protection switching processing module is notified as one of the protection switching triggering conditions, and the protection switching processing module determines whether the switching needs to be performed.
PTN倒换处理模块(实现了上述确定模块34的功能):综合各种触发条件,判断倒换状态并执行相应动作,该模块采用相关技术的PTN设备倒换处理模块即可实现。The PTN switching processing module (implementing the function of the determining module 34 described above): synthesizing various triggering conditions, judging the switching state, and performing corresponding actions, and the module can be implemented by using the PTN device switching processing module of the related technology.
图4是根据本发明优选实施例的POTN网络保护组网示意图,如图4所示,在POTN网络中,假设中间节点P1与P2之间采用的是OTN链路连接(其它连接为OTN连接或以太网连接均可,与下文描述无关),则在P1/P2节点上有误码检测模块和误码传递模块,在PE1/PE2节点上有误码处理模块和PTN倒换处理模块。4 is a schematic diagram of a POTN network protection networking according to a preferred embodiment of the present invention. As shown in FIG. 4, in a POTN network, it is assumed that an OTN link connection is used between intermediate nodes P1 and P2 (other connections are OTN connections or The Ethernet connection can be independent of the following description. On the P1/P2 node, there are error detection modules and error transmission modules. On the PE1/PE2 nodes, there are error processing modules and PTN switching processing modules.
结合上述组网示意图,图5是根据本发明优选实施例的POTN网络保护的算法流程示意图,如图5所示,该流程包括如下步骤:With reference to the above network diagram, FIG. 5 is a schematic flowchart of an algorithm for protecting a POTN network according to a preferred embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:
步骤S502,在P1/P2节点上,采用OTN误码检测技术,判断是否存在误码越限,如果存在误码越限,进入步骤S504,否则进入步骤S508;Step S502, on the P1/P2 node, using the OTN error detection technology to determine whether there is a bit error limit, if there is a bit error limit, proceed to step S504, otherwise proceed to step S508;
步骤S504,若误码检测模块判断存在误码越限,则产生远端误码越限指示,则由误码传递模块向受影响的业务对应的下游PE节点(在本图中P1的下游节点为PE1,P2的下游节点为PE2)发送特定OAM报文(在此定义为携带远端误码越限指示(far-end error indication,简称为FEI)的报文,简称为FEI报文,通知告警产生;Step S504, if the error detection module determines that there is a bit error limit, and generates a far-end error over-limit indication, the error transmission module sends the downstream PE node corresponding to the affected service (in the figure, the downstream node of P1) For the PE1, the downstream node of the P2 sends the specific OAM packet (hereinafter referred to as the far-end error indication (FEI) packet, which is referred to as the FEI packet, and is notified. An alarm is generated;
步骤S506,PE1/PE2节点误码处理模块,提取和解析FEI报文,将误码的产生情况传递到PTN倒换处理模块;Step S506, the PE1/PE2 node error processing module extracts and parses the FEI message, and transmits the error condition to the PTN switching processing module.
步骤S508,若误码检测模块判断误码越限消失,则由误码传递模块发送FEI报文通知告警消失(或以停发报文表示告警消失);Step S508, if the error detection module determines that the error exceeds the limit, the error transmission module sends an FEI message to notify that the alarm disappears (or the stop message indicates that the alarm disappears);
步骤S510,PE1/PE2节点误码处理模块,提取和解析FEI报文,将误码的消失情况传递到PTN倒换处理模块;Step S510, the PE1/PE2 node error processing module extracts and parses the FEI message, and transmits the error disappearance condition to the PTN switching processing module.
步骤S512,PTN倒换处理模块根据保护倒换规则,决策并执行倒换结果.Step S512, the PTN switching processing module determines and executes the switching result according to the protection switching rule.
采用本优选实施例的误码传递和处理机制,结合相关技术的OTN误码检测技术和PTN倒换处理功能,可实现在POTN网络中更高精度的性能劣化检测和更可靠的保护倒换,提升PTN业务的可靠性。 The error transmission and processing mechanism of the preferred embodiment, combined with the OTN error detection technology and the PTN switching processing function of the related technology, can achieve higher precision performance degradation detection and more reliable protection switching in the POTN network, and improve PTN. Business reliability.
下面介绍在POTN承载网络中,当某一段OTN链路出现误码后,按照本优选实施例的保护倒换的具体实施例。The following describes a specific embodiment of the protection switching according to the preferred embodiment after a bit error occurs in a certain OTN link in the POTN bearer network.
图6是根据本发明优选实施例的汇聚层采用POTN设备,汇聚节点间采用OTN连接的组网示意图,如图6所示,在城域POTN承载网中,网络通常分为接入、汇聚和核心三个层次,当前主要在汇聚层或核心层采用POTN设备组网,接入层主要采用纯PTN设备组网,未来可能演进至POTN设备组网。这里仅以汇聚层采用POTN设备,汇聚节点间采用OTN连接为例进行说明。FIG. 6 is a schematic diagram of a networking in which an aggregation layer uses a POTN device and an OTN connection is used between aggregation nodes according to a preferred embodiment of the present invention. As shown in FIG. 6, in a metropolitan POTN bearer network, the network is generally divided into access, aggregation, and At the core three levels, the POTN device network is mainly used at the aggregation layer or the core layer. The access layer is mainly a pure PTN device networking, and may be evolved to the POTN device networking in the future. Here, only the POTN device is used in the aggregation layer, and the OTN connection between the aggregation nodes is taken as an example for description.
实施例一:Embodiment 1:
在POTN设备实现时,光数据单元(Optical Channel Data Unit,简称为ODU)承载多协议标签交换-传送架构(Multi-Protocol Label Switching-Transport Profile,简称为MPLS-TP)时可以采用伪线(Pseudo Wire,简称为PW)over ODU方式,业务标签交换路径(Label Switched Path,简称为LSP)在POTN设备上终结,此时实施例一的方案如下:When the POTN device is implemented, the Optical Channel Data Unit (ODU) can be used as a Multi-Protocol Label Switching-Transport Profile (MPLS-TP). Wire (referred to as PW) over ODU mode, and the Label Switched Path (LSP) is terminated on the POTN device. The solution of Embodiment 1 is as follows:
1)在P1设备上,误码检测模块检测到某个ODUk发生误码越限;1) On the P1 device, the error detection module detects that an ODUk has a bit error limit;
2)P1设备上误码传递模块判断受该ODUk影响的业务PW,此处包括PE1-PE3业务和PE2-PE3业务,误码传递模块向PE1和PE2采用PW OAM封装发送FEI报文,FEI报文采用G.8113.1所述OAM报文结构,定义新的操作码(Operating Code,简称为OPCode)值以表示本报文为FEI报文,报文中携带误码越限指示(有告警为1,无告警为0),图7是根据本发明实施例一的业务和OAM报文封装示意图,报文封装如图7所示;2) The error transmission module on the P1 device determines the service PW affected by the ODUk, which includes the PE1-PE3 service and the PE2-PE3 service, and the error transmission module sends the FEI message to the PE1 and PE2 in the PW OAM encapsulation. The text uses the OAM packet structure described in G.8113.1, and defines a new operation code (Operating Code, OPCode for short) to indicate that the packet is a FEI packet. The packet carries an error indication. Figure 7 is a schematic diagram of the encapsulation of the service and the OAM packet according to the first embodiment of the present invention. The packet encapsulation is as shown in Figure 7;
3)PE1和PE2设备上误码处理模块从接口识别提取出FEI报文,解析报文内容,判断工作PW路径上有误码越限产生,通知节点内PTN倒换处理模块;3) The error processing module on the PE1 and the PE2 device extracts the FEI packet from the interface identification, parses the content of the packet, and determines that the error is exceeded on the working PW path, and notifies the PTN switching processing module in the node;
4)PE1和PE2设备上PTN倒换处理模块决策需要实施SD倒换,将业务流切换为在保护PW收发;4) The PTN switching processing module on the PE1 and PE2 needs to implement SD switching to switch the service flow to the PW.
5)结束。5) End.
实施例二: Embodiment 2:
在POTN设备实现时,ODU承载MPLS-TP时也可以采用LSP over ODU方式,业务LSP在POTN设备上进行标签交换后承载到ODUk上,此时实施例二的方案如下:When the POTN device is implemented, the ODU can also use the LSP over ODU mode to carry the MPLS-TP. The service LSP is carried on the POTN device and then carried to the ODUk. The solution of the second embodiment is as follows:
1)在P1设备上,误码检测模块检测到某个ODUk发生误码越限;1) On the P1 device, the error detection module detects that an ODUk has a bit error limit;
2)P1设备上误码传递模块判断受该ODUk影响的业务LSP,此处包括PE1-PE3业务和PE2-PE3业务,误码传递模块向PE1和PE2采用LSP OAM封装发送FEI报文,FEI报文采用G.8113.1所述OAM报文结构,定义新的OPCode值以表示本报文为FEI报文,报文中携带误码越限指示(有告警为1,无告警为0),图8是根据本发明实施例二的业务和OAM报文封装示意图,报文封装如图8所示;2) The error transmission module on the P1 device determines the service LSP affected by the ODUk, including the PE1-PE3 service and the PE2-PE3 service, and the error transmission module sends the FEI message to the PE1 and the PE2 in the LSP OAM encapsulation. The text uses the OAM packet structure described in G.8113.1, and defines a new OPCode value to indicate that the packet is a FEI packet. The packet carries an error indication (with an alarm of 1, no alarm is 0), Figure 8 A packet encapsulation of the service and the OAM packet according to the second embodiment of the present invention, and the packet encapsulation is as shown in FIG. 8;
3)PE1和PE2设备上误码处理模块从接口识别提取出FEI报文,解析报文内容,判断工作LSP路径上有误码越限产生,通知节点内PTN倒换处理模块;3) The error processing module on the PE1 and the PE2 device extracts the FEI packet from the interface identification, parses the content of the packet, determines that the error is exceeded on the working LSP path, and notifies the PTN switching processing module in the node;
4)PE1和PE2设备上PTN倒换处理模块决策需要实施SD倒换,将业务流切换为在保护LSP收发;4) The PTN switching processing module on the PE1 and PE2 needs to implement SD switching to switch the service flow to the protection LSP.
5)结束。5) End.
从上述优选实施例可以看出,该检测机制处理流程简洁,可操作性强,在POTN设备组网应用中具有较强的实用价值。It can be seen from the above preferred embodiment that the detection mechanism has a simple processing flow and strong operability, and has strong practical value in the POTN device networking application.
在另外一个实施例中,还提供了一种软件,该软件用于执行上述实施例及优选实施例中描述的技术方案。In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.
在另外一个实施例中,还提供了一种存储介质,该存储介质中存储有上述软件,该存储介质包括但不限于光盘、软盘、硬盘、可擦写存储器等。In another embodiment, a storage medium is also provided, in which the above software is stored, including but not limited to an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.
显然,本领域的技术人员应该明白,上述的本发明的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置来执行,并且在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样,本发明不限制于任何特定的硬件和软件结合。 It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
工业实用性Industrial applicability
如上所述,本发明实施例提供的一种POTN的误码检测方法、装置及系统,具有以下有益效果:能够实现在POTN网络中更高精度的性能劣化检测和更可靠的保护倒换,提升PTN业务的可靠性。 As described above, the POTN error detection method, apparatus, and system provided by the embodiments of the present invention have the following beneficial effects: enabling higher-precision performance degradation detection and more reliable protection switching in the POTN network, and improving the PTN. Business reliability.

Claims (12)

  1. 一种分组光传送网POTN的误码检测方法,包括:A method for detecting an error of a packet optical transport network POTN includes:
    POTN网络的中间节点判断是否存在误码越限,其中,所述中间节点与另一中间节点通过光传送网OTN链路连接;The intermediate node of the POTN network determines whether there is a bit error limit, wherein the intermediate node is connected to another intermediate node through an optical transport network OTN link;
    所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文。The intermediate node sends an alarm message to the downstream node corresponding to the affected service according to the judgment result.
  2. 根据权利要求1所述的方法,其中,POTN网络的中间节点判断是否存在误码越限包括:The method according to claim 1, wherein the intermediate node of the POTN network determines whether there is a bit error limit including:
    所述中间节点通过OTN误码检测技术判断是否存在误码越限。The intermediate node determines whether there is a bit error limit through the OTN error detection technology.
  3. 根据权利要求2所述的方法,其中,所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文包括:The method according to claim 2, wherein the sending, by the intermediate node, the alarm message to the downstream node corresponding to the affected service according to the judgment result includes:
    所述中间节点根据判断结果向受影响的业务对应的下游节点发送分组传送网PTN网络的运营管理和维护OAM告警报文。The intermediate node sends an operation management and maintenance OAM alarm message of the packet transport network PTN network to the downstream node corresponding to the affected service according to the judgment result.
  4. 根据权利要求3所述的方法,其中,在所述中间节点根据判断结果向受影响的业务对应的下游节点发送PTN网络的OAM告警报文之后,还包括:The method according to claim 3, wherein after the intermediate node sends the OAM alarm message of the PTN network to the downstream node corresponding to the affected service, the intermediate node further includes:
    所述下游节点对所述OAM告警报文进行解析;The downstream node parses the OAM alarm packet;
    所述下游节点根据解析结果和保护倒换规则确定是否执行倒换。The downstream node determines whether to perform switching according to the analysis result and the protection switching rule.
  5. 根据权利要求1所述的方法,其中,所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文包括:The method according to claim 1, wherein the sending, by the intermediate node, the alarm message to the downstream node corresponding to the affected service according to the judgment result includes:
    在所述判断结果为存在误码越限的情况下,所述中间节点向受影响的业务对应的下游节点发送用于通知告警产生的告警报文;和/或,If the result of the determination is that the error is exceeded, the intermediate node sends an alarm message for notifying the alarm to the downstream node corresponding to the affected service; and/or,
    在所述判断结果为误码越限消失的情况下,所述中间节点向受影响的业务对应的下游节点发送用于通知告警消失的告警报文。When the result of the determination is that the error exceeds the limit, the intermediate node sends an alarm message for notifying that the alarm disappears to the downstream node corresponding to the affected service.
  6. 根据权利要求5所述的方法,其中,所述中间节点根据判断结果向受影响的业务对应的下游节点发送告警报文包括: The method according to claim 5, wherein the sending, by the intermediate node, the alarm message to the downstream node corresponding to the affected service according to the judgment result includes:
    所述中间节点根据判断结果向受影响的业务对应的下游节点发送携带远端误码越限指示FEI的报文,其中,所述远端误码越限指示设置为指示所述告警报文是用于通知告警产生的告警报文或是用于通知告警消失的告警报文。The intermediate node sends, according to the judgment result, the packet carrying the remote error overrun indication FEI to the downstream node corresponding to the affected service, where the remote error violation indication is set to indicate that the alarm message is The alarm packet used to notify the alarm is generated or the alarm packet used to notify the alarm that the alarm disappears.
  7. 一种分组光传送网POTN的误码检测装置,位于POTN网络的中间节点中,其中,所述中间节点与另一中间节点通过光传送网OTN链路连接,包括:An error detection device of a packet optical transport network POTN is located in an intermediate node of a POTN network, wherein the intermediate node is connected to another intermediate node through an optical transport network OTN link, including:
    判断模块,设置为判断是否存在误码越限;The judging module is set to determine whether there is a fault limit;
    发送模块,设置为根据判断结果向受影响的业务对应的下游节点发送告警报文。The sending module is configured to send an alarm message to the downstream node corresponding to the affected service according to the judgment result.
  8. 根据权利要求7所述的装置,其中,所述判断模块包括:The apparatus of claim 7, wherein the determining module comprises:
    判断单元,设置为通过OTN误码检测技术判断是否存在误码越限。The judging unit is configured to determine whether there is a bit error limit by the OTN error detection technology.
  9. 根据权利要求8所述的装置,其中,所述发送模块包括:The apparatus of claim 8 wherein said transmitting module comprises:
    第一发送单元,设置为根据判断结果向受影响的业务对应的下游节点发送分组传送网PTN网络的运营管理和维护OAM告警报文。The first sending unit is configured to send the operation management and maintenance OAM alarm message of the packet transport network PTN network to the downstream node corresponding to the affected service according to the judgment result.
  10. 根据权利要求7所述的装置,其中,所述发送模块包括:The apparatus of claim 7, wherein the transmitting module comprises:
    第二发送单元,设置为在所述判断结果为存在误码越限的情况下,向受影响的业务对应的下游节点发送用于通知告警产生的告警报文;和/或,在所述判断结果为误码越限消失的情况下,向受影响的业务对应的下游节点发送用于通知告警消失的告警报文。The second sending unit is configured to: send an alarm message for notifying the alarm to the downstream node corresponding to the affected service if the result of the determination is that the error is exceeded; and/or, in the determining The result is that the alarm message for notifying the disappearance of the alarm is sent to the downstream node corresponding to the affected service.
  11. 根据权利要求10所述的装置,其中,所述发送模块包括:The apparatus of claim 10, wherein the sending module comprises:
    第三发送单元,设置为根据判断结果向受影响的业务对应的下游节点发送携带远端误码越限指示FEI的报文,其中,所述远端误码越限指示设置为指示所述告警报文是用于通知告警产生的告警报文或是用于通知告警消失的告警报文。The third sending unit is configured to send, according to the determination result, a packet carrying the remote error overrun indication FEI to the downstream node corresponding to the affected service, where the remote error overrun indication is set to indicate the alarm The packet is used to notify the alarm that the alarm is generated or the alarm that is used to notify the disappearance of the alarm.
  12. 一种POTN的误码检测系统,包括如权利要求7至11中任一项所述的POTN的误码检测装置,还包括下游节点,其中,所述下游节点包括:A POTN error detection system, comprising the POTN error detection apparatus according to any one of claims 7 to 11, further comprising a downstream node, wherein the downstream node comprises:
    解析模块,设置为在告警报文为OAM告警报文的情况下,对所述OAM告警报文进行解析;The parsing module is configured to parse the OAM trap message when the trap message is an OAM trap message;
    确定模块,设置为根据解析结果和保护倒换规则确定是否执行倒换。 The determining module is configured to determine whether to perform switching according to the parsing result and the protection switching rule.
PCT/CN2014/087117 2014-06-18 2014-09-22 Error detection method, apparatus and system for potn WO2015192518A1 (en)

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