WO2005032205A1 - A method and apparatus for realizing switching synchronously of clos cross connection matrix - Google Patents

A method and apparatus for realizing switching synchronously of clos cross connection matrix Download PDF

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Publication number
WO2005032205A1
WO2005032205A1 PCT/CN2004/001102 CN2004001102W WO2005032205A1 WO 2005032205 A1 WO2005032205 A1 WO 2005032205A1 CN 2004001102 W CN2004001102 W CN 2004001102W WO 2005032205 A1 WO2005032205 A1 WO 2005032205A1
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WIPO (PCT)
Prior art keywords
cross
matrix
synchronous switching
clos
configuration
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PCT/CN2004/001102
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English (en)
French (fr)
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WO2005032205A8 (fr
Inventor
Junan Li
Lei Xia
Hongxing Zhang
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2005032205A1 publication Critical patent/WO2005032205A1/zh
Publication of WO2005032205A8 publication Critical patent/WO2005032205A8/zh
Priority to US11/389,782 priority Critical patent/US20060209816A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements
    • H04Q3/64Distributing or queueing
    • H04Q3/68Grouping or interlacing selector groups or stages
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1302Relay switches
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1304Coordinate switches, crossbar, 4/2 with relays, coupling field
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13076Distributing frame, MDF, cross-connect switch

Definitions

  • the present invention relates to a method and device for implementing synchronous switching of a cross-connection matrix, and in particular, to a method and device for implementing synchronous switching of a CLOS cross-connection matrix.
  • a cross-connect matrix is the core part of a synchronous digital cross-connect device (hereinafter referred to as a cross-connect device).
  • Common cross-connect matrix types are square matrix and CLOS matrix.
  • the square matrix can achieve 100% non-blocking for cross-connections.
  • the disadvantage is that the size of the matrix increases exponentially with the square, and it can also be tolerated when the cross capacity is small. Increase, and the equipment cost is considerable.
  • the cross-connect capacity is large, the number of cross-nodes that the CLOS matrix needs to control is much smaller than that of the square matrix.
  • the central stage of the CLOS matrix has a fixed capacity. When capacity expansion is needed, only the capacity of the input stage and output stage can be enlarged.
  • business capacity continues to increase, and large-capacity cross-connect devices need to be introduced. Therefore, the CLOS matrix is the mainstream application matrix for cross-connect devices.
  • the introduction of the CLOS matrix reduces the complexity of the design, but also significantly reduces the cross-connect throughput rate.
  • the drastic reduction of the mate rate leads to more frequent cross-connect adjustments when the cross-connect changes, which may cause some / all of the original cross-connects to be momentarily broken.
  • the CLOS matrix consists of an input stage, an output stage, and a central stage. Each stage contains three 3 x 3 cross nodes.
  • the user needs to add a new cross-connect, and finds that x-> y has no path to connect, and the original cross-link needs to be adjusted.
  • Figure 2 when adjusting, first adjust the cross-connection of c-> c to the intermediate stage 3 3 cross-node # 1, and then you can add a new cross-connection.
  • each of the 3 x 3 cross nodes in the input stage, the output stage, and the central stage is the same. See FIG. 4, which is a schematic diagram of the structure of the prior art 3 X 3 cross node. It includes: a control interface 401, a CPU unit 402, and a 3 x 3 cross unit 403.
  • the control interface 401 here may be implemented by a communication interface of the CPU itself or may be implemented by an extended communication interface.
  • the CPU unit 402 receives, through the control interface 401, the main control information such as configuration information and control management information sent by the main control board of the cross-connect device, and controls the cross-unit 403 to cross-connect the received service data and output it to the next based on the configuration information Level or external.
  • one method is to use an in-band synchronous message mechanism.
  • the SDH / SONET frame structure provides abundant overhead bytes.
  • the in-band synchronization message mechanism completes the transfer of synchronous switching messages by inserting specific overhead in specific locations.
  • the input stage of the CLOS matrix sends specific overhead bytes at specific positions in the overhead bytes, and the central stage passes the specific overhead bytes back to the output stage.
  • the input stage, the central stage, and the output stage After receiving the synchronization message, the input stage, the central stage, and the output stage perform synchronous switching actions according to their location timing, so as to realize the synchronous switching of the CLOS matrix and prevent the instantaneous interruption during cross-connect adjustment.
  • the in-band message mechanism can solve the synchronization configuration problem, but due to the characteristics of its implementation, the following problems exist:
  • the in-band message mechanism has poor applicability and cannot meet diversified application scenarios. For example, a protocol suitable for a 3-level CLOS matrix is not applicable to a 4-level CLOS matrix. That is, the in-band message mechanism needs to be targeted at different levels of the CLOS matrix. Develop different in-band messaging protocols. Summary of the invention
  • the main object of the present invention is to provide a method for synchronous switching of a CLOS cross-connect matrix, which can ensure the synchronous switching of the input stage, the central stage, and the output stage of the CLOS matrix, and prevent a transient interruption phenomenon.
  • a second main object of the present invention is to provide a data cross-connect device, which can ensure that the input stage, the central stage, and the output stage of the CLOS matrix are switched synchronously to prevent transient interruption.
  • the present invention provides a method for implementing synchronous switching of a CLOS cross-connection matrix.
  • This method sets a configuration controller in a data cross-connect device, and the process of synchronous switching includes the following steps:
  • the configuration controller calculates the connection request and obtains a new CLOS matrix
  • the configuration controller sends the new CLOS matrix to all cross nodes that need to be switched synchronously according to the connection request;
  • the configuration controller After all the cross nodes that need to be switched synchronously have returned to the ready signal, the configuration controller sends a synchronous switch signal to notify all cross nodes that need to perform synchronous switching Switch the cross matrix;
  • the cross nodes that need to be switched synchronously may be all the cross nodes of the cross connection matrix, or all cross matrices may be changed, and the cross nodes need to be switched synchronously.
  • the step b) may include the following steps:
  • the configuration controller calculates the connection request and obtains a new CLOS matrix; otherwise, if multiple requests occur at the same time, then
  • the configuration controller performs a filtering operation on the connection request, and continuously calculates a new cross matrix until processing of all connection requests is completed to obtain a finally issued CLOS matrix.
  • the synchronous switching signal sent by the configuration controller is implemented by hardware.
  • step d) if the ready signals returned by all the cross nodes that need to be switched synchronously are not received within the preset time value TO, the configuration controller may directly trigger the synchronous switching signals and send Complete the synchronous switching to the cross node that has returned the ready signal;
  • the cross matrix is retransmitted, and the asynchronous node is used for switching.
  • step d) if the ready signals returned by all the cross nodes that need to be switched synchronously are not received within the preset time value TO, the configuration controller may also abandon the current synchronous switching Process, re-execute step c).
  • step d the configuration controller finishes triggering the "synchronous switching signal"
  • the configuration controller checks whether the cross nodes that need to perform synchronous switching return the "switching completion signal”.
  • the cross matrix is re-issued.
  • the "ready signal” and "switch completion signal” can be implemented using a software protocol.
  • the configuration control unit of the configuration controller may receive a cross-connection request, calculate the connection request and obtain a new CLOS matrix, and send it to the cross-nodes that need to be switched synchronously through the configuration interface of the configuration controller, and After receiving the ready signals returned by all the cross nodes that need to be switched synchronously through the configuration interface, the configuration control unit sends the sync switch signals to all the cross nodes that need to switch synchronously. .
  • the configuration control unit may be implemented by a CPU or a programmable logic device.
  • the configuration control unit may also be implemented by a CPU of a main control board in a data cross-connect device.
  • the present invention provides a digital cross-connect device for implementing the above method, which includes at least a main control board and a cross node, and is characterized in that the digital cross-connect device is provided with a configuration controller,
  • the configuration controller receives the cross-connect request, calculates the connection request and obtains a new CLOS matrix, and sends it to the cross-nodes that need to be switched synchronously, and is ready to return after receiving all the cross-nodes that need to be switched synchronously. After the signal is sent, a synchronous switching signal is sent to the cross node that needs to be switched synchronously;
  • the main control board is respectively connected to the configuration controller and the cross node, and it receives an external cross connection request, submits the cross connection request to the configuration controller, and sends a control command to the cross node to control and manage the cross node;
  • the cross node that needs to perform synchronous switching performs synchronous switching according to a synchronous switching signal sent by the configuration controller.
  • the configuration controller may include at least a configuration control unit and a configuration interface; the configuration control unit receives a cross connection request, calculates the connection request, and obtains The new CLOS matrix is issued to the cross nodes that need to be switched synchronously through the configuration interface, and after receiving the ready signals returned by all the cross nodes that need to be switched synchronously through the configuration interface, it is sent to the synchronous cross that requires synchronous switching.
  • the node sends a synchronous switching signal.
  • the configuration control unit may be implemented by a CPU or a programmable logic device.
  • the configuration control unit may be implemented by a CPU of a main control board in a data cross-connect backup.
  • a configuration controller for centralized control of synchronous switching is provided in the data cross-connection device, and the configuration controller simultaneously Synchronous switching signals are sent to each cross node for switching, and each cross node switches immediately after receiving the switching signal, which ensures that the input stage, central stage, and output stage of the CLOS matrix are switched synchronously and no transient interruption occurs.
  • FIG. 1 is a schematic diagram of cross-connection blocking in the CLOS matrix of the prior art
  • FIG. 2 is a schematic diagram of the successful addition of a new cross-connection after adjustment of the CLOS of the prior art
  • Fig. 4 is a schematic structural diagram of a 3 x 3 cross node in the prior art
  • FIG. 5 is a schematic diagram of the synchronous switching of the CLOS matrix of the present invention under the control of a configuration controller
  • FIG. 6 is a schematic diagram of a configuration controller and a connection with an input stage of a configuration controller according to a first preferred embodiment of the present invention
  • FIG. 7 is a schematic diagram of the first processing flow of the configuration controller in the embodiment shown in FIG. 6;
  • FIG. 8 is a schematic diagram of the second processing flow of the configuration controller in the embodiment shown in FIG. 6; Schematic diagram of the configuration of the configuration controller and the connection to the input stage of the preferred embodiment.
  • a configuration controller for centralized control of synchronous switching is provided in a data cross-connection device, and the configuration controller simultaneously provides Each cross node sends a synchronous switching signal for switching, and each cross node immediately switches after receiving the switching signal.
  • the configuration controller provided in the data cross-connect device of the present invention has two implementation modes: one is to set a configuration controller including at least a configuration control unit in the device alone; the other is a CPU of the main control board in the device Module to implement the functions of the configuration control unit described above.
  • the following two embodiments are used to describe the two implementations respectively.
  • FIG. 6 is a schematic diagram of a configuration of a configuration controller and a connection with an input stage according to a first preferred embodiment of the present invention.
  • the main control board of the device is connected to the configuration controller 610 and the cross nodes at all levels, the main control board receives an external cross connection request, and submits the cross connection dependency to the configuration controller 610; Send control commands to control and manage cross nodes.
  • information such as information sent from the main control board to the configuration controller 610 and control management commands sent by the main control board to the cross-nodes are referred to as main control information.
  • the configuration controller 610 includes: a control interface 611, a configuration control unit 612, and a configuration interface 613.
  • the configuration control unit 612 receives the main control information such as the cross connection request from the main control board through the control interface 611, and recalculates according to the cross connection request, and then obtains a new CLOS matrix through the configuration interface 613 and sends it to the input stage 600.
  • Each 3 X 3 cross node in the network sends synchronous cross signals to each 3 x 3 cross node simultaneously according to the "ready signal" returned by the 3 x 3 cross node.
  • the configuration control unit 612 can also receive the "switch completion signal" returned by the 3 x 3 cross node through the configuration interface 613. Re-switching or other processing is performed according to the signal.
  • the configuration control unit 612 of this embodiment may be implemented by a CPU or a programmable logic device.
  • the configuration interface 613 of the configuration controller 610 may use a well-known Ethernet communication circuit or other communication circuits, such as the 485, RS232, RS422 and other interfaces provided by or extended by the CPU. Of course, it can also be developed by itself. It is only necessary to have the above-mentioned communication function.
  • a 3 x 3 cross node in this embodiment is also provided with a configuration interface 604.
  • the configuration interface 604 can also be implemented by the CPU's own communication interface, and can also be implemented by the extended communication interface. Of course, it can also be implemented by the original control interface 601.
  • the configuration interface 613 of the configuration controller 610 and the configuration interface 604 in the 3 X 3 cross node can be connected through a data line and a control line, where the data line is used to transmit the calculated CLOS matrix and other information; the control line is used to transmit the configuration
  • the synchronous switching signal sent by the controller 610 and the control signals such as a "ready signal” and a "switching completion signal" that the 3 x 3 cross node returns to the configuration controller 610.
  • the data line connected to the configuration interface 613 of the configuration controller 610 and the configuration interface 604 in the 3 X 3 cross node can not only be used to transmit information such as the calculated CLOS matrix, but also transmit "ready signals” and “switch completion signals” "Wait for control signals.
  • the "ready signal” and “switch completion signal” are generated using a software protocol and sent to the configuration controller 610 through a data line.
  • destination node number (4 bytes) + source node number (4 bytes) + command code (4 bytes) + parameter length (4 bytes) + command parameter (N bytes).
  • Destination node number identifies the protocol receiver;
  • Source node number identifies the sender of the protocol
  • Command code distinguish the functions of the protocol, for example, use 0x5a5a to indicate “ready signal” and 0xa5a5 to indicate “switch completion signal”;
  • Parameter length indicates the parameter length of the subsequent command parameter part
  • Command parameters The specific parameters that this command code needs to carry, this protocol may not have.
  • the first cross node When the first cross node is ready, it can send to the configuration controller: Oxffffffff 0x00000001 0x5a5a 0x0 protocol to tell the configuration controller that cross node 1 is ready; similarly, when the first cross node is switched, you can pass the configuration control The device sends: Oxfffffffffff 0x00000001 0xa5a5 0x0 protocol to tell the configuration controller that cross node 1 has been switched.
  • connection between the configuration controller 610 and the central stage and the output stage is the same as that between the configuration controller and the input stage, and details are not described herein again.
  • FIG. 7 is a schematic diagram of the first processing flow of the configuration controller in the embodiment shown in FIG. The process includes the following four steps:
  • Step 701 The controller is configured to receive cross-connect requests such as add / remove.
  • Step 702 Recalculate the connection request and obtain a new CLOS matrix, and send it to each cross node.
  • Step 703 Receive a "ready signal" sent by each cross node.
  • step 704 when each cross node returns a "ready signal”, the configuration controller immediately triggers a synchronous switching signal, and sends the synchronous switching signal to each cross node at the same time, thereby ensuring that each cross node of the CLOS matrix performs synchronous switching of the cross matrix. .
  • the synchronous switching signals are implemented by using hardware interrupt lines.
  • the above first processing flow can completely ensure that the cross nodes of the CLOS system are switched synchronously under normal circumstances, so that there is no instant interruption when the system adjusts the cross connection.
  • the synchronous switching process should be robust and recoverable at this time, so the process needs to be improved to achieve the normal process to ensure the completion of the synchronous switching, and under abnormal conditions Processes can recover from exceptions on their own.
  • FIG. 8 is a schematic diagram of a second processing flow for configuring a controller in the embodiment shown in FIG. 6. The process includes the following steps:
  • Step 801 The configuration controller receives a cross connection request such as an add / delete.
  • step 802 it is determined whether multiple requests occur at the same moment. If multiple requests occur at the same moment, the configuration controller will perform a filtering operation; otherwise, the filtering operation will not be performed.
  • the specific process of the filtering operation may be to first create a buffer pool, all cross-connect requests are placed in the buffer pool, and when there is a new request, the configuration controller is notified to process the requests in the buffer pool; the configuration controller processes Do not trigger the synchronous switch immediately after the current request, but read the buffer pool again to see if there are new requests in the buffer pool, because it may be configured that the controller sends a new request while processing the above request; If there are still requests, then continue to calculate the cross matrix, and then repeatedly read the buffer pool until there are no more cross connection requests in the buffer pool.
  • Step 803 Calculate a new CLOS matrix and send it to the cross node where the cross matrix changes; at the same time, start receiving a "ready signal" timer.
  • the cross matrix of some cross nodes has not changed, and the cross matrix of some cross nodes has changed; the cross nodes where the cross matrix changes are synchronous cross nodes that need to be switched synchronously, and other nodes are asynchronous cross nodes.
  • Synchronous cross nodes Included in all cross nodes is a subset of all cross nodes.
  • the configuration controller recalculates the cross matrix and obtains a new cross matrix, in practical applications, not all cross nodes of the cross nodes are changed, but a few cross nodes of the cross nodes are changed. In order to improve efficiency, in this embodiment, it is preferable to switch only those cross nodes whose matrix changes. When these matrices change, the cross nodes that need to be switched synchronously are the synchronous cross nodes. In extreme cases, the cross matrix of all cross nodes has changed, and synchronous switching is required. At this time, the set of all cross nodes is consistent with the set of synchronous cross nodes.
  • the timing of receiving the "ready signal” timer is to wait for each synchronous cross node to return Returning to the time of the "ready signal", waiting for the "ready signal” cannot be indefinite and should be responded within a certain time range.
  • the waiting time is referred to as the TO time, and the TO time is preferably set to 30 ⁇ seconds.
  • Step 804 Receive a "ready signal" sent by each cross node.
  • Step 805 Determine whether the "ready signal" sent by all cross nodes is received within the TO time, and if yes, go to step 807; otherwise, go to step 806.
  • Step 806 Abandon the handover.
  • the controller is configured to abandon the current synchronous switching process and restart the second synchronous switching process. In this way, this method allows cross nodes to fail and has certain fault tolerance.
  • the synchronous switching signal can also be triggered directly by the configuration controller at this time and sent to the cross node that has returned the ready signal to complete the synchronous switching.
  • the cross matrix is retransmitted and switched using an asynchronous method. Can also have some fault tolerance.
  • Step 807 The configuration controller sends a synchronous cross signal to the cross node that returns a "ready signal”, and starts a timer for receiving a "switch completion signal". The timer is waiting for each cross node to return a "switch completion signal”.
  • the time T1 and T1 are preferably set to 500 ms.
  • Step 808 Receive a "handover completion signal" sent by each cross node.
  • step 809 it is determined whether the "handover completion signal" sent by all cross nodes is received within T1 time. If yes, go to step 810, otherwise go to step 811.
  • Step 810 the handover is completed.
  • Step 811 Check that each cross node returns a "switch completion signal", and re-issue the CLOS matrix to the cross nodes that do not return a "switch completion signal”.
  • FIG. 9 is a schematic diagram of the configuration of the configuration controller and the connection with the input stage of the second preferred embodiment of the invention.
  • the configuration controller 910 includes: a main control board CPU module 911 and a configuration interface 912.
  • the main control board CPU module 911 receives the cross connection request sent from the outside, and recalculates it according to the cross connection request, and then obtains a new CLOS matrix through the configuration interface 912, and sends it to each 3 x 3 cross node in the input stage 900.
  • the "ready signal" returned by the 3 3 cross nodes simultaneously sends a synchronous cross signal to each 3 x 3 cross node.
  • the CPU module 911 of the main control board may also receive the "switching completion signal" returned by the 3 x 3 cross node through the configuration interface 613, and perform re-switching or other processing according to the signal.
  • the main control board CPU module 911 not only sends information to the 3 x 3 cross node through the configuration interface 912, but also retains the main control information such as control management commands sent to the 3 x 3 cross node.
  • the 3 x 3 cross node directly receives the information sent by the configuration controller 910 through the original control interface 901.
  • connection between the configuration interface 912 in the configuration controller 910 and the control interface 901 in the 3 x 3 cross node, and the configuration interface 613 in the configuration controller 610 in the embodiment shown in FIG. 6 and the configuration interface 604 in the 3 x 3 cross node The connection method is exactly the same, and will not be repeated here.
  • connection between the configuration controller 910 and the central stage and the output stage is the same as the connection between the configuration controller and the input stage, and details are not described herein again.
  • the present invention implements the synchronous switching function of the CLOS matrix, which can ensure that the transient disconnection phenomenon does not occur when the cross-connection is adjusted. Since the protocol part is implemented by software, the hardware architecture is relatively simple. In addition, the present invention has a wide applicability, not only for the most commonly used 3-level CLOS matrix, but also for higher-order CLOS matrices; in the application of higher-order CLOS matrices, the protocol processing flow is unchanged.
  • the present invention introduces a configuration controller to implement centralized control of system cross-connections. All cross-connection change requests are submitted to the configuration controller, and multiple consecutive cross-connection requests are filtered into one request, which improves The system processing efficiency makes the system's cross-connect control more simple and efficient. Furthermore, the time T0 for waiting for the ready signal and the time T1 for waiting for the completion of the signal are introduced, thereby ensuring the recoverability of the system under abnormal conditions and further improving the reliability of the system.

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Description

实现 CLOS交叉连接矩阵同步切换的方法及设备
技术领域
本发明涉及一种实现交叉连接矩阵同步切换的方法及设备, 尤其涉 及一种实现 CLOS交叉连接矩阵的同步切换的方法及设备。 发明背景
在同步数字体系 /同步光网络(SDH/SONET ) 网絡中, 交叉连接矩 阵是同步数字交叉连接设备(以下称交叉连接设备) 的核心部分。 常用 的交叉连接矩阵类型为平方矩阵和 CLOS矩阵。
平方矩阵可以实现交叉连接 100%无阻塞,缺点是矩阵的规模按平方 指数增长, 在交叉容量较小时还可以承受, 当交叉容量较大时, 如果仍 然釆用平方矩阵设计, 不仅设计复杂度大幅提高, 而且设备成本也相当 可观。 当交叉连接容量较大时, CLOS矩阵需要控制的交叉结点数量比 平方矩阵的大为减少。 通常 CLOS矩阵的中央级为固定容量, 需要扩容 时仅仅扩大输入级和输出级的容量即可。 随着电信业的发展, 业务容量 不断增长, 需要引入大容量的交叉连接设备, 因此 CLOS矩阵是目前交 叉连接设备的主流应用矩阵。
CLOS矩阵的引入降低了设计的复杂度, 但也大幅降低了交叉连接 的配通率。 配通率的大幅降低导致交叉连接发生变化时会出现较频繁的 交叉连接调整, 可能导致部分 /全部原有的交叉连接出现瞬断。
如图 1所示, CLOS矩阵由输入级、 输出级和中央级组成, 每级都 包含 3个 3 x 3交叉节点, 当前已有 3条交叉连接, 分别为: a->a、 b->b和 c-〉c。 此时用户需要添加一条 新交叉连接, 发现 x->y已经没有路 径可以连接, 需要对原有的交叉连 进行调整。 如图 2所示,调整时先将 c->c的交叉连接调整到中间级 3 3交叉节点 #1 , 此时即可添加 新交叉连接。 然而必须考虑的是: 在进行交叉 连接的调整时(本例为调整 c->c的业务), 如果 CLOS矩阵的输入级、 中 间级和输出级没有实现同步切换的话, 必然导致原交叉连接出现瞬断。
如图 3所示, 由于没有进行同步切换, CLOS矩阵的输入级已经将原 交叉连接 c连接到了中央级的 3 X 3交叉节点 #1 ,可中央级此时仍然保持原 来的交叉连接方式, 导致交叉连接 c出现瞬断。
输入级、 输出级和中央级中的各个 3 x 3交叉节点的结构相同, 参见 图 4 ,图 4为现有技术 3 X 3交叉节点的结构示意图。其包含:控制接口 401、 CPU单元 402、 3 x 3交叉单元 403。这里的控制接口 401可以由 CPU本身的 通信接口来实现也可以由扩展的通信接口来实现。 CPU单元 402通过控制 接口 401接收交叉连接设备的主控板发送的配置信息、 控制管理信息等 主控信息, 根据该配置信息控制 3 3交叉单元 403将接收的业务数据进 行交叉后输出给下一级或外部。
为了实现 CLOS矩阵的同步切换, 一种方法就是使用带内同步消息 机制。 SDH/SONET帧结构中提供有丰富的开销字节, 带内同步消息机 制通过在特定位置插入特定开销的方法来完成同步切换消息的传递。
当系统需要同步切换交叉连接时, CLOS矩阵的输入级在开销字节 的特定位置发送特定的开销字节, 中央级将特定的开销字节向后传递给 输出级。 在接收到同步消息后, 输入级、 中央级和输出级才艮据自己所处 的位置定时进行同步切换动作, 这样就实现了 CLOS矩阵的同步切换, 防止交叉连接调整时出现瞬断。
带内消息机制可以解决同步配置问题, 但由于其实现的特点, 存在 以下问题:
1、 由于使用特定位置插入特定开销来实现同步切换, 因此需要一 套同步切换协议, 并且该协议需要在各级中增加純硬件逻辑来完成, 相 对成本较高;
2、 带内消息机制适用性很差, 不能满足多样化的应用场合; 比如适 用于 3级 CLOS矩阵的协议不适用于 4级 CLOS矩阵; 也就是说带内消 息机制需要针对不同级别的 CLOS矩阵开发不同的带内消息协议。 发明内容
有鉴于此, 本发明的主要目的在于提供一种实现 CLOS交叉连接矩 阵的同步切换的方法, 能够保证 CLOS矩阵的输入级、 中央级和输出级 同步切换, 防止出现瞬断现象。
本发明的第二个主要目的在于提供一种数据交叉连接设备, 该设备 能够保证 CLOS矩阵的输入级、 中央级和输出级同步切换, 防止出现瞬 断现象。
为实现上述目的的第一个方面, 本发明提供了一种实现 CLOS交叉 连接矩阵的同步切换的方法, 该方法在数据交叉连接设备中设置配置控 制器, 其同步切换的过程包括以下步骤:
a )将交叉连接请求提交给配置控制器;
b )在收到交叉连接请求后, 所述的配置控制器对连接请求进行计 算并得到新的 CLOS矩阵;
c) 所述配置控制器根据连接请求, 将新的 CLOS矩阵下发给所有需 要进行同步切换的交叉节点;
d ) 所述需要进行同步切换的交叉节点在切换准备就绪后, 返回给 配置控制器 "准备就绪信号" ;
在所有需要进行同步切换的交叉节点已返回准备就绪信号后, 所述 配置控制器发出同步切换信号, 通知所有需要进行同步切换的交叉节点 进行交叉矩阵的切换;
e )所有收到配置控制器发出的 "同步切换信号"的交叉节点在收到 该同步切换信号后, 立即切换新的交叉矩阵。
其中, 所述的需要进行同步切换的交叉节点可以为所述的交叉连接 矩阵的所有交叉节点, 也可以所有交叉矩阵发生变化, 需要进行同步切 换交叉节点。
所述步骤 b )可以包括以下步骤:
b - 1 )判断交叉连接请求次数,如果同一时刻只发生一次连接请求, 所述配置控制器对所述连接请求进行计算并得到新的 CLOS矩阵; 否则, 如果同一时刻发生多次请求, 那么
b - 2 )所述配置控制器对所述的连接请求进行过滤操作, 连续计算 新的交叉矩阵, 直到完成所有连接请求的处理, 得到最终下发的 CLOS 矩阵。
该方法中, 所述配置控制器发出的同步切换信号由硬件实现。
在所述的步骤 d ) 中, 如果在预先设定的时间值 TO内, 没有收到所 有需要同步切换的交叉节点返回的准备就绪信号, 则所述配置控制器可 以直接触发同步切换信号, 发送给已返回准备就绪信号的交叉节点, 完 成同步切换;
对于没有返回准备就绪信号的交叉节点, 则重发交叉矩阵, 采用非 同步的方法进行切换。
另外, 在所述的步骤 d ) 中, 如果在预先设定的时间值 TO内, 没有 收到所有需要同步切换的交叉节点返回的准备就绪信号, 所述配置控制 器还可以放弃当前的同步切换过程, 重新执行步骤 c ) 。
在步骤 d ) 所述配置控制器触发完 "同步切换信号" 后, 所述配置 控制器检查各需要进行同步切换的交叉节点返回 "切换完成信号" 的情 况, 对于在预先设定的时间值 Tl内没有返回 "切换完成信号" 的同步交 叉节点, 重新下发交叉矩阵。
"准备就绪信号" 和 "切换完成信号" 可以使用软件协议实现。 该方法中, 可以由配置控制器的配置控制单元接收交叉连接请求, 对连接请求进行计算并得到新的 CLOS矩阵, 并通过配置控制器的配置 接口下发给需要进行同步切换的交叉节点, 且配置控制单元在通过配置 接口收到所有需要进行同步切换的交叉节点返回的准备就绪信号后, 向 所有需要进行同步切换的同步交叉节点发送同步切换信号。 。
所述配置控制单元可以由 CPU实现或由可编程逻辑器件实现。
所述配置控制单元也可以由数据交叉连接设备中主控板的 CPU实 现。
为实现上述目的的另一个方面, 本发明提供了一种实现上述方法的 数字交叉连接设备, 至少包含主控板、 交叉节点, 其特征在于, 所述数 字交叉连接设备设置一个配置控制器,
所述配置控制器接收交叉连接请求, 对连接请求进行计算并得到新 的 CLOS矩阵, 并下发给需要进行同步切换的交叉节点, 且在收到所有 需要进行同步切换的交叉节点返回的准备就绪信号后 , 向需要进行同步 切换的交叉节点发送同步切换信号;
所述主控板与配置控制器和交叉节点分别相连, 其接收外部的交叉 连接请求, 将交叉连接请求提交给配置控制器; 并向交叉节点发送控制 命令对交叉节点进行控制和管理;
所述需要进行同步切换的交叉节点根据配置控制器发送的同步切 换信号进行同步切换。
所述的配置控制器至少可以包含配置控制单元、 配置接口; 所述配置控制单元接收交叉连接请求, 对连接请求进行计算并得到 新的 CLOS矩阵, 并通过配置接口下发给需要进行同步切换的交叉节点, 且在通过配置接口收到所有需要进行同步切换的交叉节点返回的准备 就绪信号后, 向需要进行同步切换的同步交叉节点发送同步切换信号。
所述配置控制单元可以由 CPU实现或由可编程逻辑器件实现。
所述配置控制单元可以由数据交叉连接丧备中主控板的 CPU实现。 由上述的技术方案可见, 本发明的这种实现 CLOS交叉连接矩阵的 同步切换的方法及设备, 在数据交叉连接设备中设置一个用于集中控制 同步切换的配置控制器, 由该配置控制器同时向各个交叉节点发送同步 切换信号进行切换, 各个交叉节点收到切换信号后立即进行切换, 保证 了 CLOS矩阵的输入级、中央级和输出级同步切换,不会出现瞬断现象。
附图简要说明
图 1为现有技术的 CLOS矩阵出现交叉连接阻塞的示意图; 图 2为现有技术的 CLOS调整后新交叉连接添加成功的示意图; 图 3为现有技术的 CLOS矩阵切换时原交叉连接出现瞬断的示意图; 图 4为现有技术 3 x 3交叉节点的结构示意图;
图 5为本发明的 CLOS矩阵在配置控制器的控制下实现同步切换的 示意图;
图 6本发明第一较佳实施例的配置控制器的结构和与输入级的连接 示意图;
图 7为图 6所示实施例中的配置控制器的第一种处理流程示意图; 图 8为图 6所示实施例中的配置控制器的第二种处理流程示意图; 图 9为发明第二较佳实施例的配置控制器的结构和与输入级的连接 示意图。 实施本发明的方式
下面结合附图对本发明进行详细描述。
如图 5所示, 本发明的这种实现 CLOS交叉连接矩阵的同步切换的 方法及设备, 在数据交叉连接设备中设置一个用于集中控制同步切换的 配置控制器, 由该配置控制器同时向各个交叉节点发送同步切换信号进 行切换, 各个交叉节点收到切换信号后立即进行切换。
本发明在数据交叉连接设备中设置的配置控制器有两种实现方式: 一种是在设备单独中设置一个至少包含配置控制单元的配置控制器; 另 一种是由设备中主控板的 CPU模块来实现上述配置控制单元的功能。以 下举两个实施例对两种实现方式分别进行说明。
实施例一:
本实施例是上述第一种实现方式的实施例。 参见图 6, 图 6本发明 第一较佳实施例的配置控制器的结构和与输入级的连接示意图。
本实施例中, 设备的主控板与配置控制器 610和各级的交叉节点分 别相连, 主控板接收外部的交叉连接请求, 将交叉连接倚求提交给配置 控制器 610; 并向交叉节点发送控制命令对交叉节点进行控制和管理。 本实施例中, 将主控板发送给配置控制器 610的信息及主控板发送给交 3 3叉节点的控制管理命令等信息都称为主控信息。
图 6中, 配置控制器 610包含: 控制接口 611、 配置控制单元 612 和配置接口 613。 配置控制单元 612通过控制接口 611接收主控板发来 的交叉连接请求等主控信息, 并根据交叉连接请求进行重新计算, 再将 得到新的 CLOS矩阵通过配置接口 613 , 下发给输入级 600中的各个 3 X 3交叉节点, 再根据 3 x 3交叉节点返回的 "准备就绪信号" 同时向各 个 3 x 3交叉节点发送同步交叉信号。 本实施例中配置控制单元 612还 可以通过配置接口 613接收 3 x 3交叉节点返回的 "切换完成信号,,, 根 据该信号进行重新切换或其他处理。
本实施例的配置控制单元 612可以由 CPU来实现也可以由可编程逻 辑器件来实现。
本实施例中配置控制器 610的配置接口 613 , 可以采用公知的以太 网通讯电路, 也可使用其他通信电路, 如 CPU 自带或扩展出的 485、 RS232, RS422 等接口, 当然也可自行研制 只要具有所述的通信功能 即可。
为了配合配置控制器 610的配置接口 613 ,本实施例中的 3 x 3交叉 节点中也设置了一个配置接口 604。 实际上, 配置接口 604同样可以由 CPU本身的通信接口来实现, 也可以由扩展的通信接口来实现, 当然也 可以由原来的控制接口 601来实现。
配置控制器 610的配置接口 613与 3 X 3交叉节点中的配置接口 604 之间可以通过数据线和控制线相连, 其中数据线用来传输计算出的 CLOS矩阵等信息; 控制线用来传输配置控制器 610发送的同步切换信 号以及 3 x 3交叉节点返回给配置控制器 610的 "准备就绪信号"、 "切 换完成信号" 等控制信号。 具体的实现方式有很多种, 比如可以使用电 平中断、 脉沖中断、 占空比不一样的信号等, 脉冲中断方式又可以是低 脉冲中断、 高脉冲中断等等。
当然,配置控制器 610的配置接口 613与 3 X 3交叉节点中的配置接 口 604相连的数据线不仅可以用来传输计算出的 CLOS矩阵等信息, 还 传输 "准备就绪信号"、 "切换完成信号" 等控制信号。 这时, "准备就 绪信号"、 "切换完成信号" 使用软件协议生成, 并通过数据线发送给配 置控制器 610。
例如定义如下的协议: 目的节点号(4字节) + 源节点号(4字节) +命令码(4字节) +参数长度(4字节) +命令参数(N字节) 。 目的节点号: 标识协议接收方;
源节点号: 标识协议发送方;
命令码:区別该协议的功能,比如使用 0x5a5a表示"准备就绪信号", 使用 0xa5a5表示 "切换完成信号" ;
参数长度: 表示后续的命令参数部分的参数长度;
命令参数: 该命令码需要携带的具体参数, 本协议可以没有。
给配置控制器分配一个节点号为 Oxffffffff, 其他各个交叉节点分配 一个节点号, 要求不重复即可。 当第一个交叉节点准备就绪时, 可以给 配置控制器发送: Oxffffffff 0x00000001 0x5a5a 0x0协议来告诉配置控制 器交叉节点 1巳经准备完毕; 同理当第一个交叉节点切换完毕后可以通 过给配置控制器发送: Oxffffffff 0x00000001 0xa5a5 0x0协议来告诉配置 控制器交叉节点 1已经切换完毕。
本实施例中, 配置控制器 610与中央级、 输出级的连接都和配置控 制器与输入级的连接相同, 这里不再赘述。
引入配置控制器后, 所有的添加和删除交叉连接操作都在配置控制 器的控制下完成。 需要添加 /删除交叉连接时, 主控板将要添加 /删除的 交叉连接提交给配置控制器, 由配置控制器统一处理完成。
本实施例中配置控制器进行同步切换可以有两种处理流程。
第一种处理流程: 参见图 7, 图 7为图 6所示实施例中的配置控制器 的第一种处理流程示意图。 该流程包括以下四个步驟:
步骤 701 , 配置控制器接收添加 /删除等交叉连接请求。
步骤 702, 对连接请求进行重新计算并得到新的 CLOS矩阵, 并下发 给各个交叉节点。
计算 CLOS矩阵的方法已经在 CLOS. C的专利文献中得到公开,此处 不再赘述。 步骤 703, 接收各个交叉节点发送的 "准备就绪信号" 。
步骤 704, 当各个交叉节点都返回了 "准备就绪信号" 时, 配置控 制器立即触发同步切换信号, 将同步切换信号同时发送给各个交叉节 点, 保证 CLOS矩阵的各交叉节点进行交叉矩阵的同步切换。
为了保证各个交叉节点收到的同步切换信号几乎是同时的, 同步切 换信号适用硬件中断线来实现。
以上第一种处理流程在正常情况下完全可以保证 CLOS系统的各个 交叉节点同步切换, 实现系统调整交叉连接时无瞬断。 但考虑到系统同 步切换过程中可能出现异常, 此时同步切换流程应该是健壮的、 可恢复 的, 所以需要对该流程进行完善, 实现正常情况下流程能够保证同步切 换的完成, 而异常情况下流程能够自行从异常中恢复。
因此, 本发明还提供了第二种处理方式: 参见图 8, 图 8为图 6所示 实施例中的配置控制器的第二种处理流程示意图。 该流程包括以下步 骤:
步骤 801 , 配置控制器接收添加 /删除等交叉连接请求。
步骤 802, 判断同一时刻是否发生了多次请求, 如果同一时刻发生 多次请求, 配置控制器将实施过滤操作, 否则不实施过滤操作。
过滤操作的具体过程可以是先创建一个緩沖池, 所有的交叉连接请 求都放入到緩冲池中, 当有新的请求时通知配置控制器对緩沖池中的请 求进行处理; 配置控制器处理完当前请求后不要立刻触发同步切换, 而 是再次读取緩冲池, 看緩冲池中是否还有新的请求, 因为可能配置控制 器在处理上面的请求时又有新的请求发出了; 如果还有请求的话, 那么 再继续计算交叉矩阵, 之后重复读取緩冲池直到緩冲池中不再有交叉连 接请求为止。
以上仅仅是一个具体的例子, 实际应用中完全可以采用其他内容功 能的协议。 比如: 改变以上协议中各个字段的位置, 添加更多的字段来 表示更丰富的内容, 修改各个字段的长度以满足自己应用的需要等等, 有多种实现方案。
由于所有的交叉连接变更请求都提交给配置控制器 , 多个连续的交 叉连接请求会被过滤为一次请求, 这样不仅提高了系统处理效率, 同时 也减少了软件的设计复杂度。 如果没有过滤操作, 当有多次交叉连接变 更请求时, 系统会执行这么一个流程: 计算新的交叉矩阵一下发给各个 同步节点并进行同步切换 ~ 计算另一个新的交叉矩阵 ~ 下发给各 个同步节点并进行同步切换。 如果有过滤操作, 可以用更有效的流程: 计算新的交叉矩阵, 再计算新的交叉矩阵, 直到所有的交叉连接请求都 处理完, 将新的交叉矩阵下发给各同步节点并进行同步切换。
步骤 803, 计算新的 CLOS矩阵并下发给交叉矩阵发生变化的交叉节 点; 同时启动接收 "准备就绪信号" 定时器。
此时有些交叉节点的交叉矩阵没有发生变化, 有些交叉节点的交叉 矩阵发生了变化; 交叉矩阵发生变化的交叉节点为需要进行同步切换的 同步交叉节点, 其他节点为非同步交叉节点; 同步交叉节点包含在所有 交叉节点中, 是所有交叉节点的一个子集。
由于配置控制器会对交叉矩阵进行重新计算, 并得到新的交叉矩 阵, 在实际应用中, 并不是所有交叉节点的交叉矩阵都发生变化, 而是 很少一部分交叉节点的交叉矩阵发生变化。为提高效率,在本实施例中, 优选只切换那些矩阵发生变化的交叉节点。 这些矩阵发生了变化是需要 进行同步切换的交叉节点就是同步交叉节点。 极端情况下, 所有交叉节 点的交叉矩阵都发生了变化, 都需要进行同步切换, 此时所有交叉节点 的集合与同步交叉节点的集合是一致的。
接收 "准备就绪信号" 定时器的定时时间是等待各同步交叉节点返 回 "准备就绪信号" 的时间, 等待 "准备就绪信号" 不能是无限期的, 应该在一定的时间范围内得到响应, 称该等待时间为 TO时间, TO时间优 选地取值为 30亳秒。
步骤 804, 接收各个交叉节点发送的 "准备就绪信号" 。
步驟 805 , 判断在 TO时间内是否接收到所有交叉节点发送的 "准备 就绪信号" , 如果是则执行步骤 807, 否则执行步骤 806。
步驟 806, 放弃本次切换。
TO时间超时(即等待就绪超时) , 表示只有部分同步交叉节点完成 了同步切换的准备工作, 本次同步切换失败,属异常情况。 当通信电路、 状态线和软件协议处理部分足够稳定时, 不会出现该情况。 为了保证同 步切换过程的健壮性, 本实施例中配置控制器放弃当前的同步切换过 程, 重新进行第二轮同步切换流程。 这样, 本方法允许交叉节点出现故 障, 具有一定的容错能力。
当然, 此时也可以由配置控制器直接触发同步切换信号, 发送给已 返回准备就绪信号的交叉节点, 完成同步切换。 而对于没有返回准备就 绪信号的交叉节点, 则重发交叉矩阵, 采用非同步的方法进行切换。 也 能具有一定的容错能力。
步骤 807, 配置控制器向返回了 "准备就绪信号" 的交叉节点发送 同步交叉信号, 并启动接收 "切换完成信号" 定时器, 该定时器的定时 时间是等待各个交叉节点返回 "切换完成信号" 的时间 Tl, T1时间优选 地取值为 500ms。
步骤 808, 接收各个交叉节点发送的 "切换完成信号" 。
步骤 809, 判断在 T1时间内是否接收到所有交叉节点发送的 "切换 完成信号" , 如果是则执行步骤 810, 否则执行步骤 811。
步骤 810, 本次切换完成。 步骤 811 , 检查各交叉节点返回 "切换完成信号" 的情况, 对没有 返回 "切换完成信号" 的交叉节点重新下发 CLOS矩阵。
实施例二:
本实施例是上述第二种实现方式的实施例。 图 9为发明第二较佳实 施例的配置控制器的结构和与输入级的连接示意图。
其中,配置控制器 910包含:主控板 CPU模块 911和配置接口 912。 主控板 CPU模块 911接收外部发送的交叉连接请求,并根据交叉连接请 求进行重新计算, 再将得到新的 CLOS矩阵通过配置接口 912, 下发给 输入级 900中的各个 3 x 3交叉节点, 再 居 3 3交叉节点返回的 "准 备就绪信号" 同时向各个 3 x 3 交叉节点发送同步交叉信号。 本实施例 中主控板 CPU模块 911还可以通过配置接口 613接收 3 x 3交叉节点返 回的 "切换完成信号", 根据该信号进行重新切换或其他处理。 主控板 CPU模块 911除了通过配置接口 912向 3 x 3交叉节点发送信息外, 还 保留原有向 3 X 3交叉节点发送的控制管理命令等主控信息。
本实施例中, 3 x 3交叉节点直接通过原有,的控制接口 901接收配置 控制器 910发送的信息。
配置控制器 910中配置接口 912与 3 x 3交叉节点中控制接口 901 之间的连接方式, 和图 6所示实施例中配置控制器 610中配置接口 613 与 3 x 3交叉节点中配置接口 604的连接方式完全相同, 这里不再重复 说明。
本实施例中, 配置控制器 910与中央级、 输出级的连接都和配置控 制器与输入级的连接相同, 这里也不再赘述。
与图 6所示实施例一样, 本实施例中配置控制器进行同步切换可以 有两种处理流程。 两种处理流程也与图 7、 图 8完全相同, 这里也不再重 复说明。 由上述的实施例可见, 本发明实现了 CLOS矩阵的同步切换功能, 能够保证交叉连接发生调整时不会出现连接瞬断现象。 由于协议部分由 软件实现, 硬件体系结构相对简单。 另外, 本发明具有广泛的适用性, 不仅适用于最为常用的 3级 CLOS矩阵, 而且适用于更高阶的 CLOS矩阵; 在高阶 CLOS矩阵的应用中, 协议的处理流程是不变的。
而且, 本发明引入配置控制器后实现了系统交叉连接的集中式控 制, 所有的交叉连接变更请求都提交给配置控制器, 多个连续的交叉连 接请求会被过滤为一次请求, 这样就提高了系统处理效率, 使得系统的 交叉连接控制更为筒单和高效。 进一步讲, 由于引入了等待准备就绪信 号时间 T0、 等待切换完成信号时间 Tl , 从而保证了异常情况下系统的可 恢复性, 进一步提高了系统的可靠性。
以上对本发明的描述是参考其具体实施方式来进行的, 这些描述不 应当被认为是对本发明的限制。 任何不背离本发明精神和范围的修改和 变换都属于由本发明的权利要求所定义的本发明的范围之内。

Claims

权利要求书
1、 一种实现 CLOS交叉连接矩阵同步切换的方法, 其特征在于, 该 方法在数据交叉连接设备中设置配置控制器, 其同步切换的过程包括以 下步骤:
a )将交叉连接请求提交给配置控制器;
b )在收到交叉连接请求后, 所述的配置控制器对连接请求进行计 算并得到新的 CLOS矩阵;
c )所述配置控制器根据连接请求, 将新的 CLOS矩阵下发给所有需 要进行同步切换的交叉节点;
d )所述需要进行同步切换的交叉节点在切换准备就绪后, 返回给 配置控制器 "准备就绪信号" ;
在所有需要进行同步切换的交叉节点已返回准备就绪信号后, 所述 配置控制器发出同步切换信号, 通知所有需要进行同步切换的交叉节点 进行交叉矩阵的切换; .
e )所有收到配置控制器发出的 "同步切换信号"的交叉节点在收到 该同步切换信号后, 立即切换新的交叉矩阵。
2、 根据权利要求 1所述的 CLOS交叉连接矩阵同步切换的方法, 其 特征在于: 所述的需要进行同步切换的交叉节点为所述的交叉连接矩阵 的所有交叉节点。
3、 根据权利要求 1所述的 CLOS交叉连接矩阵同步切换的方法, 其 特征在于: 所述的需要进行同步切换的交叉节点为所述的交叉连接矩阵 的所有交叉矩阵发生变化, 需要进行同步切换交叉节点。
4、 居权利要求 1、 2或 3所述的 CLOS交叉连接矩阵同步切换的方 法, 其特征在于, 所述步骤 b ) 包括以下步骤: b - 1 )判断交叉连接请求次数,如果同一时刻只发生一次连接请求, 所述配置控制器对所述连接请求进行计算并得到新的 CLOS矩阵; 否则, 如果同一时刻发生多次请求, 那么
b - 2 )所述配置控制器对所述的连接请求进行过滤操作, 连续计算 新的交叉矩阵, 直到完成所有连接请求的处理, 得到最终下发的 CLOS 矩阵。
5、 根据权利要求 1、 2或 3所述的 CLOS交叉连接矩阵同步切换的方 法, 其特征在于: 所述配置控制器发出的同步切换信号由硬件实现。
6、 根据权利要求 1、 2或 3所述的 CLOS交叉连接矩阵同步切换的方 法, 其特征在于: 在所述的步驟 d ) 中, 如果在预先设定的时间值 TO内, 没有收到所有需要同步切换的交叉节点返回的准备就绪信号 , 则所述配 置控制器直接触发同步切换信号, 发送给已返回准备就绪信号的交叉节 点, 完成同步切换;
对于没有返回准备就绪信号的交叉节点, 则重发交叉矩阵, 采用非 同步的方法进行切换。
7、 根据权利要求 1、 2或 3所述的 CLOS交叉连接矩阵同步切换的方 法, 其特征在于: 在所述的步骤 d ) 中, 如果在预先设定的时间值 TO内, 没有收到所有需要同步切换的交叉节点返回的准备就绪信号, 则所述配 置控制器放弃当前的同步切换过程, 重新执行步驟 c ) 。
8、 根据权利要求 1、 2或 3所述的 CLOS交叉连接矩阵同步切换的方 法, 其特征在于: 在步骤 d ) 所述配置控制器触发完 "同步切换信号" 后, 所述配置控制器检查各需要进行同步切换的交叉节点返回 "切换完 成信号,, 的情况, 对于在预先设定的时间值 T1内没有返回 "切换完成信 号" 的同步交叉节点, 重新下发交叉矩阵。
9、 根据权利要求 1所述的 CLOS交叉连接矩阵同步切换的方法, 其 特征在于 "准备就绪信号" 和 "切换完成信号" 使用软件协议实现。
10、 根据权利要求 1所述的 CLOS交叉连接矩阵同步切换的方法, 其 特征在于,
由配置控制器的配置控制单元接收交叉连接请求, 对连接请求进行 计算并得到新的 CLOS矩阵, 并通过配置控制器的配置接口下发给需要 进行同步切换的交叉节点, 且配置控制单元在通过配置接口收到所有需 要进行同步切换的交叉节点返回的准备就緒信号后, 向所有需要进行同 步切换的同步交叉节点发送同步切换信号。
11、 根据权利要求 10所述的 CLOS交叉连接矩阵同步切换的方法, 其特征在于: 所述配置控制单元由 CPU实现或由可编程逻辑器件实现。
12、 根据权利要求 10所述的 CLOS交叉连接矩阵同步切换的方法, 其特征在于: 所述配置控制单元由数据交叉连接设备中主控板的 CPU实 现。
13、 一种实现权利要求 1所述方法的数字交叉连接设备, 至少包含 主控板、 交叉节点, 其特征在于, 所述数字交叉连接设备设置一个配置 控制器,
所述配置控制器接收交叉连接请求, 对连接请求进行计算并得到新 的 CLOS矩阵, 并下发给需要进行同步切换的交叉节点, 且在收到所有 需要进行同步切换的交叉节点返回的准备就绪信号后, 向需要进行同步 切换的交叉节点发送同步切换信号;
所述主控板与配置控制器和交叉节点分别相连, 其接收外部的交叉 连接请求, 将交叉连接请求提交给配置控制器; 并向交叉节点发送控制 命令对交叉节点进行控制和管理;
所述需要进行同步切换的交叉节点根据配置控制器发送的同步切 换信号进行同步切换。
14、 根据权利要求 13所述的数字交叉连接设备, 其特征在于: 所述 的配置控制器至少包含配置控制单元、 配置接口;
所述配置控制单元接收交叉连接请求, 对连接请求进行计算并得到 新的 CLOS矩阵, 并通过配置接口下发给需要进行同步切换的交叉节点, 且在通过配置接口收到所有需要进行同步切换的交叉节点返回的准备 就绪信号后, 向需要进行同步切换的同步交叉节点发送同步切换信号。
15、 根据权利要求 14所述的数字交叉连接设备, 其特征在于: 所述 配置控制单元由 CPU实现或由可编程逻辑器件实现。
16、 根据权利要求 14所述的数字交叉连接设备, 其特征在于: 所述 配置控制单元由数据交叉连接设备中主控板的 CPU实现。
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