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1. 发明授权

US5712853A Apparatus and method for transferring operation, administration and management cells across and ATM data frame user network interface 失效
标题翻译： ATM和ATM数据帧用户网络接口传输操作，管理和管理单元的设备和方法
公开(公告)号：US5712853A
公开(公告)日：1998-01-27
申请号：US526846
申请日：1995-09-11
申请人： Deepak Mathur , Peter T. Marino
发明人： Deepak Mathur , Peter T. Marino
IPC分类号： H04L12/56 , H04Q11/04 , H04J3/16
CPC分类号： H04Q11/0478 , H04L2012/5615 , H04L2012/5616 , H04L2012/5625 , H04L2012/5652
摘要： A method and switch appratus for transporting an ATM layer OAM cell across a FUNI are disclosed. The method broadly includes generating a DXI (FUNI) frame from the ATM layer OAM cell by using certain bits of the five byte ATM overhead as bits in the two byte DXI (FUNI) header, using the forty-eight byte ATM OAM cell payload as the payload for the DXI (FUNI) frame, and providing an indication in a predetermined bit field of the two byte DXI header that the forty-eight byte payload is an ATM OAM cell. Preferably, the predetermined bit field includes the previously reserved second lsb of Octet 1 of the DXI frame header, and the previously reserved third lsb of Octet 2 of the DXI frame header, which are set to values of "0" and "1" to indicate an ATM OAM cell, and to "0" and "0" to identify "regular" data.
摘要翻译：公开了一种用于在FUNI上传输ATM层OAM单元的方法和切换设备。该方法广泛地包括通过使用四字节的ATM OAM信元有效载荷作为两字节DXI（FUNI）报头中的位，通过使用五字节ATM开销的某些位来从ATM层OAM信元生成DXI（FUNI）帧用于DXI（FUNI）帧的有效载荷，并且在四字节有效载荷是ATM OAM信元的两个字节DXI报头的预定位字段中提供指示。优选地，预定比特字段包括DXI帧头部的Octet1的先前保留的第二个lsb和DXI帧头部的先前保留的Octet 2的第三个lsb，它们被设置为“0”和“1”到指示ATM OAM小区，并且指示“0”和“0”来标识“正常”数据。

2. 发明授权

US5659540A Apparatus and method for detection of operation administration and management (OAM) cell loopback and physical loopbacks in an asynchronous transfer mode (ATM) network 失效
标题翻译：用于在异步传输模式（ATM）网络中检测操作管理和管理（OAM）小区环回和物理环回的装置和方法
公开(公告)号：US5659540A
公开(公告)日：1997-08-19
申请号：US573244
申请日：1995-12-15
申请人： David X. Chen , Deepak Mathur , L. David Danenberg
发明人： David X. Chen , Deepak Mathur , L. David Danenberg
IPC分类号： H04J3/14
CPC分类号： H04J3/14
摘要： A method for identifying and declaring a physical loopback condition upon running an OAM loopback test is provided. The method modifies ITU-T Recommendation I.610. According to the method, an OAM loopback test cell is generated with a correlation tag and a loopback indication value representing an outbound (forward) test cell, with the correlation tag being stored. Upon receiving back an OAM loopback test cell, the value of the loopback indication is determined, and the correlation tag of the incoming OAM loopback test cell is compared with the stored correlation tag. If the correlation tags match and the value of the loopback indication represents a forward test cell, a physical loopback condition is declared. On the other hand, if the correlation tags match and the value of the loopback indication represents a backward test cell, a successful OAM loopback condition is declared. An apparatus including a memory, a management processor, and a header processor for implementing the method of the invention is also disclosed.
摘要翻译：提供了一种在运行OAM环回测试时识别和声明物理环回条件的方法。该方法修改了ITU-T I.610建议书。根据该方法，生成具有表示出站（前进）测试小区的相关标签和环回指示值的OAM环回测试小区，存储相关标签。在接收到OAM环回测试单元后，确定环回指示值，并将输入的OAM环回测试单元的相关标签与存储的相关标签进行比较。如果相关标签匹配，并且环回指示的值表示正向测试单元，则声明物理环回条件。另一方面，如果相关标签匹配，并且环回指示的值表示反向测试单元，则声明成功的OAM环回条件。还公开了一种包括用于实现本发明的方法的存储器，管理处理器和头处理器的装置。

3. 发明授权

US5864555A Method and apparatus for generating a proxy connection endpoint for operation administration and management (OAM) asynchronous transfer mode (ATM) cells 失效
标题翻译：用于生成用于操作管理和管理（OAM）异步传输模式（ATM）信元的代理连接端点的方法和装置
公开(公告)号：US5864555A
公开(公告)日：1999-01-26
申请号：US675955
申请日：1996-07-05
申请人： Deepak Mathur , David X. Chen , L. David Danenberg
发明人： Deepak Mathur , David X. Chen , L. David Danenberg
IPC分类号： H04L12/56 , H04Q11/04 , H04J3/14
CPC分类号： H04Q11/0478 , H04L2012/5625
摘要： Methods and apparatus are provided for handling asynchronous transfer mode (ATM) cells sent from first user equipment through a plurality of ATM nodes and destined for second equipment, when the second equipment does not support ATM operations and maintenance (OAM) functionality. In particular, an ATM node connected to the second equipment is configured as an OAM proxy connection end-point for the second equipment such that ATM data cells which are destined for the second equipment are sent in a usual fashion, but ATM OAM cells destined for the second equipment are terminated and acted upon by the ATM node and are not forwarded to the second equipment. The proxy connection end-point functionality is preferably obtained by providing a user-friendly management information database (MIB) which stores configuration information for the ATM node. The configuration information is used by a management processor of the node for deciding when an incoming OAM cell intended for the second equipment is to be terminated by the ATM node.
摘要翻译：当第二设备不支持ATM操作和维护（OAM）功能时，提供了用于处理从第一用户设备通过多个ATM节点发送并发往第二设备的异步传输模式（ATM）小区的方法和装置。特别地，连接到第二设备的ATM节点被配置为用于第二设备的OAM代理连接端点，使得以通常方式发送去往第二设备的ATM数据单元，但是发往ATM OAM单元第二台设备由ATM节点终止并执行，不转发给第二台设备。代理连接端点功能优选地通过提供一种用于存储ATM节点的配置信息的用户友好的管理信息数据库（MIB）来获得。所述配置信息由所述节点的管理处理器用于决定何时由所述ATM节点终止所述用于所述第二设备的入局OAM小区。

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