• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention discloses a method for testing between multiple nodes of an ATM switching system. The present invention enables a multi-node test in an ATM exchange system, so that the availability test, the connection state test, the performance test, and the continuity test of the connection established between the multiple nodes can be performed. According to this method, the role point of the interface module for the established connection is designated by the operator as a segment end point or a connection point to enable a multinode test.
    公开号:KR20000044470A
    申请号:KR1019980060968
    申请日:1998-12-30
    公开日:2000-07-15
    发明作者:윤형택
    申请人:윤종용；삼성전자 주식회사；
    IPC主号:
    专利说明:

    Test Method between Multiple Nodes of ATM Switching System
    The present invention relates to an inter-node test method of an exchange system, and more particularly, to a multi-node test method of an ATM exchange system.
    In the case of performing the performance, continuity test, or link status checking test between interface modules in a typical TDX (Time Division eXchange) switch, the test was possible only between the interface modules to which the link was connected. Similarly, when testing the condition or performance of the matching device linking the exchange period, only two connected target boards could be tested. This test operation is shown in FIGS. 1 and 2.
    FIG. 1 is a diagram showing a connection configuration during a performance and connection state test between an interface module (IM) 2 and an IM 4 in a TDX exchange.
    FIG. 2 is a diagram illustrating a connection configuration during performance and connection state tests between TDX exchange nodes. FIG. That is, FIG. 2 is a view showing a connection configuration during the test of the performance and the connection state between the first node and the second node, and shows a target device in which the matching devices 12 and 21 connected by a thick line are performed. As can be seen in the figure, only tests between single nodes connected by a link are possible.
    1 and 2, the biggest problem of the test method according to the prior art as shown in FIG. 1 is that when the connection state and performance test between the interface module (IM) or each node of the exchange, the matching device connected to the physical link To test only the liver. In the case of testing in this way, there is a problem in that it is not possible to carry out tests such as the availability of the connection, the establishment of the connection, the performance of the connection, and the continuity for the connection established between the multiple nodes. That is, testing between interface modules that pass through multiple exchanges cannot be carried out.
    It is therefore an object of the present invention to provide a method that enables testing across multiple nodes in an exchange system.
    Another object of the present invention is to provide a method for performing an availability test, a connection state test, a performance test, and a continuity test of a connection established between multiple nodes in an exchange system.
    In order to achieve these objects, the present invention enables a multi-node test in an ATM switching system to perform an availability test, a connection state test, a performance test, and a continuity test of a connection established between multiple nodes. Suggest ways to help. According to this method, the role point of the interface module for the established connection is designated by the operator as a segment end point or a connection point to enable a multinode test.
    According to the present invention, a method for testing between multiple nodes of an ATM switching system; A first process of changing a role point for connection of an interface module provided in each node, a second process of determining whether a required connection exists when a test processing request is received, and a connection is established The third step of determining whether or not the physical link is available if the test can be performed, and if the physical state of the link is available, generates an OAM cell, which is test data according to the required state, in the direction of connection It is characterized by consisting of a fourth process of performing the test.
    In the first process, the role point for the connection of the interface module provided in each node may be changed to a segment end point, a connection point or a connection end point.
    The OAM cell may be generated as a loop cell, an activation cell, a deactivation cell, a performance monitoring cell or a continuity cell.
    When the OAM cell generated and received in step 4 is the segment endpoint cell, the node whose connection point is the connection point plays a role according to the type of OAM cell after passing the corresponding OAM cell.
    If the OAM cell received after being generated in step 4 is a segment endpoint cell, the node whose role of connection is the segment endpoint or the connection endpoint drops the OAM cell and plays a role according to the type of OAM cell.
    If the OAM cell received after being generated in step 4 is a point-to-point OAM cell, the node whose role of connection is the connection point or the endpoint of the segment passes through the corresponding OAM cell and plays a role according to the type of OAM cell.
    If the OAM cell received after being generated in the fourth process is a segment end point cell, the node whose role of connection is the connection end point performs a role according to the type of OAM cell after dropping the corresponding OAM cell.
    1 is a view showing the test operation between the interface module inside the TDX exchanger according to the prior art.
    2 shows a TDX switch inter-node test operation according to the prior art.
    3 is a diagram illustrating a connection configuration for a test operation between multiple nodes according to the present invention;
    4 illustrates a process flow for changing a role point for a connection in accordance with the present invention.
    5 shows a flow of processing a test request for a connection in accordance with the present invention.
    DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or chip designer, and the definitions should be made based on the contents throughout the present specification.
    First, the present invention enables a multi-node test in an Asynchronous Transfer Mode (ATM) switching system, that is, an availability test, a connection state test, a performance test, and a continuity test for a connection established between multiple nodes. This multi-node test according to the present invention is performed by the following principle.
    First, an operation and maintenance (OAM) role point for a connection of a specific node serves as a segment end point, a connection point, or a connection end point.
    Second, OAM cells such as Loopback Cell, Activation Cell, Deactivation Cell, Performance Monitoring Cell, and Continuity Cell Is used.
    Third, when receiving the segment ending OAM cell, the node whose connection point is the connection point passes through the corresponding OAM cell, and the node whose role point of the connection is the segment endpoint or connection end point drops the ATM OAM cell after dropping the OAM cell. Play a role according to the type of.
    Fourth, when receiving an end-to-end OAM cell, the node whose connection point is the connection point or segment end point passes the OAM cell, and the node whose connection point is the connection end point drops the OAM cell. After that, it plays a role according to the type of ATM OAM cell.
    Fifth, all nodes can conditionally monitor the flow of OAM cells for a particular connection.
    The connection configuration in the multi-node test operation according to the present invention for performing the multi-node test according to the above principles is shown in FIG. 3.
    Figure 3 shows an example of a multi-node test for the connection between node 1 and node 3 through node 2. In this case, the device of each node may be an access device, an ATM switch, a router, a multiplexer, or the like. In the present invention, it should be noted that the device 10, 20, 30 of each node is described as an example of a switch. For the operation of the multi-node test process according to the present invention, interface modules (IM) 3, 4 (21, 22), which are matching devices mounted in node 2 connected between node 1 and node 3, are connected to the established connection. It exists in the role of a connection point, and node 1's IM 12 and node 3's IM 31 must be able to serve as segment endpoints. The operation of changing these role points should be performed according to the flow as shown in FIG. 4.
    4 is a flowchart illustrating a process of changing a role point for a connection in each node according to the present invention. First, after receiving the role point change request, the connection information processor determines whether the connection is established (step 40). In the case of a node having a connection established, it is determined whether the change of the role point has been previously performed for each type by classifying the types of the requested role points (steps 41 to 44). At this time, the types of role points include a segment end point, a connection point CP, and a connection end point CEP. If the role point for the connection is different from the required state for each node, the role point change processing routine is performed (step 45). After processing the role point change for the node connection, the operation result is notified to the operator who requested the role point change (step 46).
    5 is a diagram illustrating a flow of processing a test request for a connection between multiple nodes according to the present invention.
    Test processing between multiple nodes can be handled by the operator's request or by a periodic method of execution. When performing the test processing execution request, the command processing receiving unit determines whether the requested connection is in the connection information (step 50). If the connection is established, it is determined whether the test can be performed and whether the physical link is available (ie whether the line is normal) (step 51). If the physical state of the link is available, the OAM cell is created according to the required state to process the required test request, and the test is performed in the connection direction to be tested (step 52). In this case, the OAM cell may be a segment-end or end-to-end cell. After handling all required test requirements, the results of the processing shall be reported to the operator requesting the test between multiple nodes.
    After the process flow shown in FIG. 4, that is, the role point for the connection has been normally changed, it should be required to start the test in the IM2 12 of the node 1 or the IM5 31 of the node 3. The source matching device generates an ATM OAM cell (loopback cell, performance monitoring cell, continuity check cell, activation cell, deactivation cell) according to the request, and transmits the ATM OAM cell in the desired direction for testing. To start. In the case where the IM2 12 of FIG. 3 is a source-side matching device, the IM5 31 becomes a destination (sink). In the case where the IM5 31 is a source-side matching device, the IM2 12 is a destination. Becomes Therefore, the source side matching device IM2 (12) / IM5 (31) generates an ATM OAM cell and transmits it to the IM5 (31) / IM2 (12) side to start the test. When the test cell is introduced upstream, the connection point IM3 (21) and IM4 (22) pass through the test cell for the connection and the sink side interface device (IM2 (12) or IM5 (31), which is the end point of the segment. ) Drops the AMT OAM cell and performs OAM processing according to the type of cell.
    As described above, the present invention has an advantage of efficiently checking whether a connection is available or a maintenance state of the connection even after the connection establishment process and the connection establishment. In addition, there is an advantage that the performance test, continuity test, and status test for the connection between the node and the adjacent node or the node passing through the multiple nodes can be more useful. In addition, when a network failure occurs, there is an advantage that the failure point can be more effectively identified.
    Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.
    权利要求:
    Claims (7)
    [1" claim-type="Currently amended] In the multi-node test method of the ATM switching system,
    A first process of changing a role point for connection of an interface module provided in each node;
    A second step of determining whether a requested connection exists when a request for performing test processing is received;
    A third step of determining whether or not a physical link is available if a connection is established;
    If the physical state of the link is available, the multi-node inter-test method comprising the step of performing the test in the connection direction to test by generating the OAM cell, the test data according to the required state.
    [2" claim-type="Currently amended] The method of claim 1, wherein in the first process, the role point for the connection of the interface module provided in each node is changed to a segment end point, a connection point, or a connection end point.
    [3" claim-type="Currently amended] The method of claim 1, wherein the OAM cell is generated as a loop cell, an activation cell, a deactivation cell, a performance monitoring cell, or a continuity cell.
    [4" claim-type="Currently amended] The method according to claim 2, wherein when the OAM cell received after being generated in the fourth process is a segment endpoint cell, the node whose role of connection is the connection point performs a role according to the type of OAM cell after passing through the corresponding OAM cell. A method for testing between multiple nodes.
    [5" claim-type="Currently amended] The method according to claim 2, wherein when the OAM cell received after being generated in the fourth process is a segment endpoint cell, the node whose role of connection is the segment endpoint or the connection endpoint is a role according to the type of the OAM cell after dropping the corresponding OAM cell. Multi-node test method characterized in that for performing.
    [6" claim-type="Currently amended] The method according to claim 2, wherein when the OAM cell received after being generated in the fourth process is a point-to-point OAM cell, the node whose role of connection is the connection point or the end point of the segment passes through the corresponding OAM cell and according to the type of the OAM cell. A method for testing between multiple nodes, characterized by performing a role.
    [7" claim-type="Currently amended] The method according to claim 2, wherein when the OAM cell received after being generated in the fourth process is a segment endpoint cell, the node whose role of the connection is the connection endpoint is to perform a role according to the type of the OAM cell after dropping the corresponding OAM cell. Multi-node inter-test method.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-12-30|Application filed by 윤종용, 삼성전자 주식회사
    1998-12-30|Priority to KR1019980060968A
    2000-07-15|Publication of KR20000044470A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019980060968A|KR20000044470A|1998-12-30|1998-12-30|Method for testing multi nodes in asynchronous transfer mode switching system|
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