WO2013053260A1 - 反向复用异步传输模式设备故障后自动恢复的方法及装置 - Google Patents

反向复用异步传输模式设备故障后自动恢复的方法及装置 Download PDF

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WO2013053260A1
WO2013053260A1 PCT/CN2012/079769 CN2012079769W WO2013053260A1 WO 2013053260 A1 WO2013053260 A1 WO 2013053260A1 CN 2012079769 W CN2012079769 W CN 2012079769W WO 2013053260 A1 WO2013053260 A1 WO 2013053260A1
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ima
group
state machine
state
links
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PCT/CN2012/079769
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French (fr)
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关鲁君
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中兴通讯股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06Management of faults, events, alarms or notifications
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks

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  • the present invention relates to a packet transport network (PTN) technology, and in particular, to a method and apparatus for automatically recovering a device after a fault is supported by an Inverse Multiplexing for ATM (IMA) protocol.
  • PTN packet transport network
  • IMA Inverse Multiplexing for ATM
  • the IMA protocol is a protocol that runs between devices at both ends. The two ends need to exchange protocol content to ensure that packets are sent and received at both ends. Only when the near-end and far-end groups are in the Operational state, the near-end group can send the Asynchronous Transfer Mode (ATM) cells.
  • ATM Asynchronous Transfer Mode
  • the group traffic state machine is the state of the near-end group and the remote group. To indicate whether the near-end group can send ATM cells.
  • Figure 1 is a schematic diagram of the state transition of the IMA group traffic state machine. As shown in Figure 1, if one end cannot enter the Operational state due to a link failure, ATM cells are not sent at both ends of the IMA group. In the group state machine of the IMA protocol, after entering the steady state, the group state cycles between Operational, Blocked, and Insufficent-Links. If the number of activated links is less than the configured minimum number of links due to a link failure, the group status will remain in the Insufficent-Links state. Even if some links are available, the IMA group will not send ATM cells. Resources are not being used effectively. Summary of the invention
  • the present invention provides a method and an apparatus for automatically recovering an IMA device after a fault to solve the problem that the network resources cannot be effectively utilized after entering the Insufficent-Links state due to a link failure.
  • the present invention provides a method for automatically recovering an IMA device after a fault, the method comprising: monitoring an IMA group status;
  • the IMA group state machine is restarted, specifically:
  • the IMA group state is restarted.
  • the preset threshold ranges from 0 to 1 hour.
  • the preset threshold ranges from 0 to 5 seconds.
  • the resetting the minimum activated link number to a value not greater than the current active link number is specifically: resetting the minimum active link number to a value equal to the current active link number.
  • the present invention also provides an apparatus for automatically recovering after an IMA device failure, the device comprising: a group status monitoring module, configured to monitor an IMA group status;
  • the group state machine restarting module is configured to restart the IMA group state when the IMA group status is in the Insufficent-Links state;
  • the minimum active link number reset module is used to reset the minimum active link number to a value not greater than the currently active link number.
  • the group state machine restarting module is further configured to perform, when the IMA group state is in the Insufficent-Links state, restarting the IMA group state machine, specifically, when the duration of the IMA group state in the Insufficent-Links state exceeds When the threshold is preset, the IMA group state machine is restarted.
  • the group state machine restarting module is further configured to set a value range of the preset threshold to 0 to 1 hour.
  • the group state machine restarting module is further configured to take the preset threshold
  • the value range is set to 0 to 5 seconds.
  • the minimum activated link number reset module is further configured to perform resetting the minimum activated link number to a value that is not greater than the current active link number, specifically, resetting the minimum active link number. Is the value equal to the number of currently activated links.
  • the invention solves the prior art standard-based IMA protocol by automatically restarting the IMA group state machine and reducing the minimum number of active links.
  • the manual intervention can only be performed manually.
  • the invention automatically restarts the IMA group state machine without manual intervention, and adjusts the configuration parameters, so that the IMA group can transmit ATM cells and make full use of network resources. After the network fault is recovered, the configuration can be manually modified without affecting the original network configuration.
  • Figure 1 is a schematic diagram showing the state transition of the IMA group traffic state machine
  • FIG. 2 is a schematic flowchart of a method for automatically recovering an IMA device after a fault according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a normal state IMA group according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a link failure IMA group according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an apparatus for automatically recovering an IMA device after failure according to an embodiment of the present invention. detailed description
  • a method for automatically recovering an IMA device after a fault is provided.
  • the main idea of the method is: The IMA group state machine monitors its own group status in real time. If the IMA group state machine is in the Insufficent-Links state, then The IMA group state machine is automatically restarted and is currently The number of links (links) that are active is used as a new parameter, that is, the minimum number of active links is restarted. Then, the IMA group is reported to the network management system and restarted with new parameters, so as to manually recover the fault or the previous configuration.
  • FIG. 2 is a flowchart of a method for automatically recovering an IMA device after a fault according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step 201 The IMA group state machine monitors the group status. If the IMA group status is in the Insufficent-Links state, the minimum number of active links configured in the IMA group is recorded, including the minimum activated link number TXnl and the minimum activated link number RXnl. And recording the number of links currently active, including transmitting the number of active links TXn2 and receiving the number of active links RXn2, and then performing step 202. On the other hand, if the above conditions are not met, the IMA state is continued.
  • the time threshold of the IMA group state machine restart may be set, and the IMA group state machine is restarted only when the IMA group state exceeds the preset time threshold T1 for the duration of the Insufficent-Links state.
  • the preset threshold T1 can take a value within 0 to 1 hour, preferably in a value of 0 to 5 seconds.
  • the present invention may also not set the restart time threshold of the IMA group state machine. As long as the status of the IMA group is confirmed to be Insufficent-Links state, the method of the present invention can be implemented at any time to automatically restart the IMA device.
  • step 202 the IMA group state machine automatically restarts and enters a startup state.
  • the number of currently activated links in the present invention is not 0, otherwise the meaning is lost.
  • Step 203 Reset the minimum activated link number to a value not greater than the currently activated link number.
  • the value of the current active link number may be directly used as a new value of the minimum activated link number, that is, the value of TXn2 is assigned to TXnl, the value of RXn2 is assigned to RXnl, and the minimum activated link is set. The number of adjusted events is reported to the user.
  • Step 204 The group state machine of the IMA protocol enters an Operational state.
  • an IMA group is created between the base station (NodeB) and the radio network controller (RNC, Radio Network Controller).
  • the IMA ID of the NodeB is 0, and the IMA ID of the RNC is 4.
  • the number of links between the sites is 4, assuming symmetric configuration of symmetric operation.
  • the frame length is fixed to M bytes, M is a natural number, the IMA protocol label (IMA OAM Label) is consistent, and the Insufficient-Links state is timed out.
  • the time threshold T1 is set to 5 seconds.
  • the two stations are negotiated.
  • the IMA group state machines at both ends are Operational.
  • the cells are normally sent and received between the two sites.
  • the connection with the link ID of 3 between the two sites is interrupted, and the IMA group state machine of the NodeB station enters the Insufficient-Links state.
  • Step 1 The IMA group state machine on the NodeB monitors the status of the IMA group.
  • Step 2 The IMA group state machine automatically restarts and enters the startup state.
  • the third step resetting the minimum number of active links TXn1.
  • TXn2 is assigned to TXnl, then the reset TXn1 is 3, and the minimum activated link number is adjusted to 3. Report to the network management. Since it is a symmetric mode, RXnl and RXn2 are processed in the same way, and RXnl is reset to 3.
  • Step 4 The group state machine of the IMA protocol performs the original process and negotiates with the remote RNC. Finally, the IMA group state machine enters the Operational state, the IMA group traffic state machine is normal, and ATM cells can be transmitted between the two sites. The business is automatically restored.
  • FIG. 5 is a schematic structural diagram of an apparatus for automatically recovering an IMA device after a failure according to an embodiment of the present invention.
  • an automatic recovery apparatus for an IMA device after failure according to an embodiment of the present invention includes a group status monitoring module 501 and a group state machine restarting module. 502 and a minimum activated link number reset module 503. The respective modules of the embodiments of the present invention are described in detail below.
  • the group status monitoring module 501 is configured to monitor the status of the IMA group.
  • the group state machine restart module 502 is configured to restart the IMA group state when the IMA group status is in the Insufficent-Links state.
  • the IMA group state machine when the state of the IMA group is in the Insufficent-Links state, the IMA group state machine is restarted, specifically: when the IMA group state exceeds the preset threshold in the Insufficent-Links state, the IMA group state machine is restarted.
  • the preset threshold may be in the range of 0 to 1 hour, particularly preferably 0 to 5 seconds.
  • the minimum activated link number reset module 503 is configured to reset the minimum active link number to a value no greater than the currently activated link number. In the embodiment of the present invention, the minimum activated link number may be reset to a value equal to the current active link number.
  • the invention automatically restarts the IMA group state machine without manual intervention, and reduces the minimum number of activation links, so that the IMA group can transmit ATM cells and make full use of network resources. After the network failure is restored, the configuration can be manually modified without affecting the original network configuration. It solves the problem that the standard-based IMA protocol in the prior art can only manually intervene when the IMA group state machine is stuck in the Insufficent-Links state, and can manually change the configuration to enter the IMA group state machine restart state.

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

Abstract

本发明公开了一种IMA设备故障后自动恢复的方法,该方法包括:监测IMA组状态;当IMA组状态在链路不足状态持续的时间超过预设门限时,重启IMA组状态机;将最小激活链路数重新设置为不大于当前激活链路数的值。本发明还公开了一种IMA设备故障后自动恢复的装置,包括组状态监测模块、组状态机重启模块和最小激活链路数重置模块。其中,组状态机重启模块,用于当IMA组状态在链路不足状态时,重启IMA组状态机。采用本发明的方案,解决了基于标准的IMA协议在组状态机停滞在链路不足状态时,只能手动干预才能进入组状态机重启状态的问题,实现了IMA组故障后的自动恢复,充分利用了网络资源。

Description

反向复用异步传输模式设备故障后自动恢复的方法及装置 技术领域
本发明涉及分组传送网 (PTN, Packet Transport Network )技术, 尤其 涉及一种支持反向复用异步传输模式(IMA, Inverse Multiplexing for ATM ) 协议的设备故障后自动恢复的方法及装置。 背景技术
IMA协议是一种运行于两端设备之间的协议, 两端需要交互协议内容 保证两端收发包正常。 只有近端和远端组都处于可操作 ( Operational )状态 时, 近端组才能发送异步传输模式(ATM, Asynchronous Transfer Mode ) 信元, 组流量状态机就是通过近端组和远端组的状态来表示近端组是否可 以发送 ATM信元。
图 1是 IMA组流量状态机的状态变迁示意图, 如图 1所示, 如果一端 因为链路故障无法进入 Operational状态, 则 IMA组的两端不会发送 ATM 信元。在 IMA协议的组状态机中, 进入稳定状态后,组状态在 Operational, 阻塞(Blocked )和链路不足( Insufficent-Links )之间循环。 如果因为链路 故障导致激活的链路数小于配置的最小链路数, 那么组状态将一直保持在 Insufficent-Links状态, 即使还有一些链路可用, IMA组也不会发送 ATM 信元, 网络资源得不到有效利用。 发明内容
本发明提供一种 IMA设备故障后自动恢复的方法及装置, 以解决现有 技术中当由于链路故障进入 Insufficent-Links状态后网络资源得不到有效利 用的问题。 本发明提供一种 IMA设备故障后自动恢复的方法, 该方法包括: 监测 IMA组状态;
当 IMA组状态在 Insufficent-Links状态时, 重启 IMA组状态机; 将最小激活链路数重新设置为不大于当前激活链路数的值。
进一步地, 所述当 IMA组状态在 Insufficent-Links状态时, 重启 IMA 组状态机, 具体为:
当 IMA组状态在 Insufficent-Links状态的持续时间超过预设门限时,重 启 IMA组^ 态机。
进一步地, 所述预设门限的取值范围为 0至 1小时。
进一步地, 所述预设门限的取值范围为 0至 5秒。
进一步地, 所述将最小激活链路数重新设置为不大于当前激活链路数 的值, 具体为: 将最小激活链路数重新设置为等于当前激活链路数的值。
本发明还提供了一种 IMA设备故障后自动恢复的装置, 该装置包括: 组状态监测模块, 用于监测 IMA组状态;
组状态机重启模块,用于当 IMA组状态在 Insufficent-Links状态时,重 启 IMA组^ 态机;
最小激活链路数重置模块, 用于将最小激活链路数重新设置为不大于 当前激活链路数的值。
进一步地, 所述组状态机重启模块, 进一步用于执行当 IMA组状态在 Insufficent-Links状态时, 重启 IMA组状态机的情况下, 具体是当 IMA组 状态在 Insufficent-Links状态的持续时间超过预设门限时,重启所述 IMA组 状态机。
进一步地, 所述组状态机重启模块, 进一步用于将所述预设门限的取 值范围设置为 0至 1小时。
进一步地, 所述组状态机重启模块, 进一步用于将所述预设门限的取 值范围设置为 0至 5秒。
进一步地, 所述最小激活链路数重置模块, 进一步用于执行将最小激 活链路数重新设置为不大于当前激活链路数的值的情况下, 具体是将最小 激活链路数重新设置为等于当前激活链路数的值。
本发明有益效果如下:
本发明通过自动重启 IMA组状态机, 并且减小最小激活链路数, 解决 了现有技术中基于标准的 IMA 协议在 IMA 组状态机停滞在 Insufficent-Links状态时, 只能手动干预, 并且手动更改配置才能进入 IMA 组状态机重启状态的问题。本发明无需人工干预, 自动重启 IMA组状态机, 并且调整配置参数, 使 IMA组能够传递 ATM信元, 充分利用网络资源。 待网络故障恢复之后, 能够人工修改配置, 并不影响原有的网络配置。 附图说明
图 1是 IMA组流量状态机的状态变迁示意图;
图 2是本发明实施例的 IMA设备故障后自动恢复方法流程示意图; 图 3是本发明实施例的正常状态 IMA组示意图;
图 4是本发明实施例的链路故障 IMA组示意图;
图 5是本发明实施例的 IMA设备故障后自动恢复装置结构示意图。 具体实施方式
以下结合附图以及实施例, 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施例仅仅用以解释本发明, 并不限定本发明。
方法实施例
根据本发明的实施例, 提供了一种 IMA设备故障后自动恢复的方法, 该方法的主要思想是: IMA组状态机实时监测自己的组状态, 如果 IMA组 状态机在 Insufficent-Links状态,那么 IMA组状态机自动重启,并且以当前 处于激活的链接(link )数作为新参数, 即最小激活链路数进行重启。 并且 上报网管该 IMA组, 以新的参数进行了重启, 以便后续人工恢复故障或者 之前的配置。
图 2是本发明实施例的 IMA设备故障后自动恢复的方法的流程图, 如 图 2所示, 该方法流程具体包括如下步驟:
步驟 201 , IMA 组状态机监测组状态, 如果 IMA 组状态在 Insufficent-Links状态, 则记录 IMA组当前配置的最小激活链路数, 包括发 送最小激活链路数 TXnl和接收最小激活链路数 RXnl , 并记录当前处于激 活状态的链路数, 包括发送激活链路数 TXn2和接收激活链路数 RXn2, 然 后执行步驟 202。 反之, 若不满足上述条件则继续进行 IMA状态。
本发明实施例中, 可以设置 IMA组状态机重启的时间门限, 仅当 IMA 组状态在 Insufficent-Links状态持续的时间超过预设的时间门限 T1时, 方 重启 IMA组状态机。 本发明实施例中, 预设的门限 T1可以取 0至 1小时 内的值, 以取 0至 5秒内的值为佳。 当然, 本发明也可以不设置 IMA组状 态机的重启时间门限 ,只要确认 IMA组状态为 Insufficent-Links状态, 即可 随时实施本发明方法, 以自动重启 IMA设备。
步驟 202, IMA组状态机自动重启, 进入启动 (startup )状态。 当然, 本发明中当前激活链路数不为 0, 否则失去了意义。
步驟 203, 将最小激活链路数重新设置为不大于当前激活链路数的值。 本发明实施例中, 可以直接将当前激活链路数的值作为最小激活链路 数的新的取值, 即将 TXn2的值赋给 TXnl , 将 RXn2的值赋给 RXnl , 并 将最小激活链路数调整的事件上报用户。
步驟 204 , IMA协议的组状态机进入 Operational状态。
下面以一个链接数 N=4的 IMA组为实例,来说明如何采用本发明方法 实现 IMA设备故障后的自动恢复。 如图 3所示,在基站( NodeB )和无线网络控制器( RNC , Radio Network Controller ) 的站点之间创建了一个 IMA组, NodeB的 IM A ID为 0, RNC 的 IMA ID为 4, 两个站点之间的链路数为 4, 假设是对称配置对称操作的 模式, 帧长固定都是 M个字节, M为自然数, IMA协议的标签(IMA OAM Label )一致, Insufficient-Links状态的超时时间门限 T1设为 5秒。 NodeB 配置的最小激活链路数为 TXnl=RXnl=4 , RNC 的最小激活链路数为 TXnl=RXnl=2, 两个站点经过协商, 在某时刻 T1 , 两端的 IMA组状态机 都是 Operational状态, 两个站点之间正常发送和接收信元。 如图 4所示, 在某时刻 T2, 两个站点之间的链路 ID为 3的连接中断, 导致 NodeB站点 的 IMA组状态机进入 Insufficient-Links状态。
下面描述采用本发明方法自动实现 IMA组到恢复 Operational状态。 第一步: NodeB端的 IMA组状态机监测 IMA组状态, 检测到当前激 活链路数为 3 , 而配置的最小激活链路数为 4 , 则 IMA 组状态进入 Insufficent-Links状态。 在 Insufficent-Links持续的时间超过 5秒后, 记录当 前处于激活状态的链路数 TXn2=RXn2=3 , 并执行第二步。
第二步: IMA组状态机自动重启, 进入 startup状态。
第三步:对发送最小激活链路数 TXnl进行重新设置,本发明实施例中, 将 TXn2的值赋予 TXnl , 则重置后的 TXnl为 3, 并且把最小激活链路数 调整为 3的事件上报网管。由于是对称模式,所以同时以同样的规则对 RXnl 和 RXn2进行处理, 将 RXnl重置为 3。
第四步: IMA协议的组状态机进行原有流程和对端 RNC端进行协商, 最终 IMA组状态机进入 Operational状态, IMA组流量状态机正常, 两站点 之间能够进行 ATM信元传递, 完成了业务自动恢复。
装置实施例
根据本发明的实施例, 提供了一种 IMA设备故障后自动恢复的装置, 图 5是本发明实施例的 IMA设备故障后自动恢复装置的结构示意图, 如图 5所示, 本发明实施例的 IMA设备故障后自动恢复装置, 包括组状态监测 模块 501、 组状态机重启模块 502和最小激活链路数重置模块 503。 以下对 本发明实施例的各个模块进行详细的说明。
具体地, 组状态监测模块 501 , 用于监测 IMA组状态。
组状态机重启模块 502,用于当 IMA组状态在 Insufficent-Links状态时, 重启 IMA组^ 态机。
本发明实施例中 ,当 IMA组状态在 Insufficent-Links状态时,重启 IMA 组状态机 ,具体为: 当 IMA组状态在 Insufficent-Links状态的持续时间超过 预设门限时, 重启 IMA组状态机。 本发明实施例中, 预设门限的取值范围 可以为 0至 1小时, 尤以 0至 5秒为佳。
最小激活链路数重置模块 503,用于将最小激活链路数重新设置为不大 于当前激活链路数的值。 本发明实施例中, 可以是将最小激活链路数重新 设置等于当前激活链路数的值。
尽管为示例目的, 已经公开了本发明的优选实施例, 本领域的技术人 员将意识到各种改进、 增加和取代也是可能的, 因此, 本发明的范围应当 不限于上述实施例。 工业实用性
本发明无需人工干预, 自动重启 IMA组状态机, 并且减小最小激活链 路数, 使 IMA组能够传递 ATM信元, 充分利用了网络资源。 待网络故障 恢复之后, 能够人工修改配置, 并不影响原有的网络配置。 解决了现有技 术中基于标准的 IMA协议在 IMA组状态机停滞在 Insufficent-Links状态时 , 只能手动干预,并且手动更改配置才能进入 IMA组状态机重启状态的问题。

Claims

权利要求书
1、 一种反向异步传输模式复用 IMA设备故障后自动恢复的方法, 其 特征在于, 该方法包括:
监测 IMA组状态;
当 IM A组状态在链路不足状态时, 重启 IMA组状态机;
将最小激活链路数重新设置为不大于当前激活链路数的值。
2、 根据权利要求 1所述的 IMA设备故障后自动恢复的方法, 其特征 在于,所述当 IMA组状态在链路不足状态时,重启 IMA组状态机,具体为: 当 IMA组状态在链路不足状态的持续时间超过预设门限时,重启 IMA 组状态机。
3、 根据权利要求 2所述的 IMA设备故障后自动恢复的方法, 其特征 在于, 所述预设门限的取值范围为 0至 1小时。
4、 根据权利要求 2所述的 IMA设备故障后自动恢复的方法, 其特征 在于, 所述预设门限的取值范围为 0至 5秒。
5、 根据权利要求 1至 4中任一项所述的 IMA设备故障后自动恢复的 方法, 其特征在于, 所述将最小激活链路数重新设置为不大于当前激活链 路数的值, 具体为: 将最小激活链路数重新设置为等于当前激活链路数的 值。
6、 一种反向异步传输模式复用 IMA设备故障后自动恢复的装置, 其 特征在于, 该装置包括:
组状态监测模块, 用于监测 IMA组状态;
组状态机重启模块, 用于当 IMA组状态在链路不足状态时, 重启 IMA 组状态机;
最小激活链路数重置模块, 用于将最小激活链路数重新设置为不大于 当前激活链路数的值。
7、 根据权利要求 6所述的 IMA设备故障后自动恢复的装置, 其特征 在于, 所述组状态机重启模块, 进一步用于当所述 IMA组状态在链路不足 状态的持续时间超过预设门限时, 重启所述 IMA组状态机。
8、 根据权利要求 7所述的 IMA设备故障后自动恢复的装置, 其特征 在于, 所述组状态机重启模块, 进一步用于将所述预设门限的取值范围设 置为 0至 1小时。
9、 根据权利要求 7所述的 IMA设备故障后自动恢复的装置, 其特征 在于, 所述组状态机重启模块, 进一步用于将所述预设门限的取值范围设 置为 0至 5秒。
10、 根据权利要求 6至 9中任一项所述的 IMA设备故障后自动恢复的 装置, 其特征在于, 所述最小激活链路数重置模块, 进一步用于将所述最 'J、激活链路数重新设置为等于所述当前激活链路数的值。
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