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1.发明授权System and method for efficiently monitoring information in a network having a plurality of repeaters 失效用于有效监视具有多个转发器的网络中的信息的系统和方法
公开(公告)号：US5592486A
公开(公告)日：1997-01-07
申请号：US406081
申请日：1995-03-17
申请人： William Lo , Ian S. Crayford
发明人： William Lo , Ian S. Crayford
CPC分类号： H04L43/00 , H04L12/2602 , H04L12/44
摘要： A method and apparatus for efficiently transferring a data packet on a network. The efficient transfer of data includes compressing the data as the data packet is transmitted from a repeater to a management unit by determining if a destination address of a received packet matches a stored management unit address. When the stored address does not match the destination address, the data packet is compressed. The apparatus includes a repeater, a management unit, and a packet compression mechanism. The apparatus further includes comparator circuit means for determining address comparisons and count comparisons to control data compression.
摘要翻译： 一种用于在网络上有效地传送数据分组的方法和装置。 数据的有效传输包括当数据分组从中继器发送到管理单元时，通过确定接收到的分组的目的地址是否与存储的管理单元地址匹配来压缩数据。 当存储的地址与目标地址不匹配时，数据包被压缩。 该装置包括中继器，管理单元和分组压缩机制。 该装置还包括用于确定地址比较和计数比较以控制数据压缩的比较器电路装置。
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公开(公告)号：US5850515A
公开(公告)日：1998-12-15
申请号：US827675
申请日：1997-04-10
申请人： William Lo , Ian S. Crayford
发明人： William Lo , Ian S. Crayford
CPC分类号： H04L63/123 , H04L29/06 , H04L63/1416 , H04L63/1441
摘要： A method and apparatus for securing a network from access by unauthorized end stations. A port in a multiport repeater can be disabled automatically upon detection of an unknown source address in a data packet. In addition, an interrupt signal is provided to the indicate the detection of an intruder. Further, the disabling of the port can be done substantially immediately to interrupt the re-transmission of a single packet. Alternatively, the disabling of a port can be done programmably after a predetermined number of intruder packets have been detected, or after the verification of packet integrity.
摘要翻译： 一种用于保护网络免受未经授权的终端站访问的方法和装置。 检测到数据包中的未知源地址时，可以自动禁用多端口转发器中的端口。 另外，提供中断信号以指示入侵者的检测。 此外，端口的禁用可以基本上立即进行以中断单个分组的重传。 或者，在已经检测到预定数量的入侵者分组之后，或者在验证分组完整性之后，可以可编程地完成端口的禁用。
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3.发明授权Method and system for increasing network information carried in a data packet via packet tagging 失效用于通过分组标签增加数据包中携带的网络信息的方法和系统
公开(公告)号：US5550803A
公开(公告)日：1996-08-27
申请号：US406085
申请日：1995-03-17
申请人： Ian S. Crayford , William Lo
发明人： Ian S. Crayford , William Lo
CPC分类号： H04L43/00 , H04L12/2602 , H04L12/44 , H04L43/0847 , H04Q2213/13172 , H04Q2213/13293 , H04Q2213/13396
摘要： A method and system for providing statistical network information carried in a data packet being transmitted on a network. The method includes the steps of receiving a data packet having a data portion on a repeater and transferring the data portion to a management unit. The method further includes the step of appending statistical information to the data portion during an inter-packet gap period. The apparatus for providing statistical information in a data packet on a network includes a repeater mechanism, a management unit mechanism, and a packet tagging circuit. The repeater mechanism receives a data packet having a data portion, the management unit mechanism determines statistical information based on the data packet, and the packet tagging circuit appends information to the data portion of the data packet during an inter-packet gap period.
摘要翻译： 一种在网络上发送的数据包中提供统计网络信息的方法和系统。 该方法包括以下步骤：在中继器上接收具有数据部分的数据分组，并将数据部分传送到管理单元。 该方法还包括在数据包间隔时段期间将统计信息附加到数据部分的步骤。 用于在网络上的数据分组中提供统计信息的装置包括中继器机制，管理单元机制和分组标签电路。 中继器机构接收具有数据部分的数据分组，管理单元机构基于数据分组确定统计信息，并且分组标签电路在分组间间隔时段期间将信息附加到数据分组的数据部分。
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4.发明授权Method and system for increasing network information carried in a data packet via packet tagging 失效用于通过分组标签增加数据包中携带的网络信息的方法和系统
公开(公告)号：US6016308A
公开(公告)日：2000-01-18
申请号：US698185
申请日：1996-08-15
申请人： Ian S. Crayford , William Lo
发明人： Ian S. Crayford , William Lo
CPC分类号： H04L43/00 , H04L12/2602 , H04L12/44 , H04L43/0847 , H04Q2213/13172 , H04Q2213/13293 , H04Q2213/13396
摘要： A method and system for providing statistical network information carried in a data packet being transmitted on a network. The method includes the steps of receiving a data packet having a data portion on a repeater and transferring the data portion to a management unit. The method further includes the step of appending statistical information to the data portion during an inter-packet gap period. The apparatus for increasing information in a data packet on a network includes a repeater mechanism, a management unit mechanism, and a packet tagging circuit. The repeater mechanism receives a data packet having a data portion, the management unit mechanism determines statistical information based on the data packet, and the packet tagging circuit appends information to the data portion of the data packet during an inter-packet gap period.
摘要翻译： 一种在网络上发送的数据包中提供统计网络信息的方法和系统。 该方法包括以下步骤：在中继器上接收具有数据部分的数据分组，并将数据部分传送到管理单元。 该方法还包括在数据包间隔时段期间将统计信息附加到数据部分的步骤。 用于增加网络中的数据分组中的信息的装置包括中继器机制，管理单元机制和分组标签电路。 中继器机构接收具有数据部分的数据分组，管理单元机构基于数据分组确定统计信息，并且分组标签电路在分组间间隔时段期间将信息附加到数据分组的数据部分。
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公开(公告)号：US5654985A
公开(公告)日：1997-08-05
申请号：US653703
申请日：1996-05-23
申请人： Ian S. Crayford , William Lo , Nader Vijeh
发明人： Ian S. Crayford , William Lo , Nader Vijeh
CPC分类号： H04L63/0236 , H04L12/22 , H04L12/46
摘要： A system is provided for use in a network to provide authentication of packets of data, provide security to ensure the prevention of unauthorized receipt of data, to provide improved monitoring of the packets of data transmitted and received over such a network, and to detect changes in the network topology. Repeaters utilized in the network are provided with the capability to detect and interpret packet data and the source address (SA) and destination address (DA) fields to provide the improved features.
摘要翻译： 提供一种在网络中使用的系统来提供数据分组的认证，提供安全性以确保防止未经授权的数据接收，提供对通过这样的网络发送和接收的数据分组的改进的监视，以及检测变化 在网络拓扑。 在网络中使用的中继器具有检测和解释分组数据和源地址（SA）和目的地址（DA）字段以提供改进的特征的能力。
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公开(公告)号：US5581559A
公开(公告)日：1996-12-03
申请号：US406082
申请日：1995-03-17
申请人： Ian S. Crayford , William Lo
发明人： Ian S. Crayford , William Lo
CPC分类号： H04L43/00 , H04L12/22 , H04L12/2602 , H04L12/44 , H04L12/4625 , H04L63/0272 , H04L43/0817
摘要： A method for providing a secure local area network includes the steps of receiving a data packet having a destination address and comparing the destination address to stored end station addresses. The data packet is disrupted on the repeater for the ports except the port with an associated stored end station address matching the destination address. Also, the disrupting of the data packet can be enabled on an individual port basis. A system includes a controller, a memory/comparator, and an inverse disrupt control mechanism. The inverse disrupt control mechanism produces a disrupt signal to disrupt the data packet on non-matching ports of the repeater when a match occurs within the repeater. The data packet is not disrupted on a port linking two repeaters when there is no match within the repeater. The inverse disrupt control can also be enabled or disabled on an individual port basis.
摘要翻译： 一种用于提供安全局域网的方法包括以下步骤：接收具有目的地地址的数据分组，并将目的地地址与存储的终端地址进行比较。 除了端口之外的端口，数据包在中继器中被中断，其中相关联的存储的终端站地址与目的地址匹配。 此外，可以在单个端口上启用数据分组的中断。 一个系统包括一个控制器，一个存储器/比较器和一个反向中断控制机制。 当中继器发生匹配时，逆中断控制机制产生中断信号，以中断中继器的非匹配端口上的数据包。 当中继器中没有匹配时，数据包在连接两个中继器的端口上不会中断。 也可以在单个端口上启用或禁用反向中断控制。
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公开(公告)号：US5414694A
公开(公告)日：1995-05-09
申请号：US19926
申请日：1993-02-19
申请人： Ian S. Crayford , William Lo , Nader Vijeh
发明人： Ian S. Crayford , William Lo , Nader Vijeh
CPC分类号： H04L12/4625 , H04L12/46
摘要： A system is provided for use in a network to provide authentication of packets of data, provide security to ensure the prevention of unauthorized receipt of data, to provide improved monitoring of the packets of data transmitted and received over such a network, and to detect changes in the network topology. Repeaters utilized in the network are provided with the capability to detect and interpret packet data and the source address (SA) and destination address (DA) fields to provide the improved features.
摘要翻译： 提供一种在网络中使用的系统来提供数据分组的认证，提供安全性以确保防止未经授权的数据接收，提供对通过这样的网络发送和接收的数据分组的改进的监视，以及检测变化 在网络拓扑中。 在网络中使用的中继器具有检测和解释分组数据和源地址（SA）和目的地址（DA）字段以提供改进的特征的能力。
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公开(公告)号：US5610903A
公开(公告)日：1997-03-11
申请号：US485891
申请日：1995-06-07
申请人： Ian S. Crayford
发明人： Ian S. Crayford
IPC分类号： H04L5/14 , H04L5/16 , H04L12/413 , H04L29/06 , H04J3/02
CPC分类号： H04L12/40136 , H04L12/413 , H04L29/06 , H04L69/24
摘要： A system provides for detection of enhanced capabilities of stations on a communications network. A specified pattern of link test pulses are detected and transmitted to provide for the indication of enhanced capabilities. This is particularly useful for determining whether a particular station is in full duplex or half duplex mode without affecting overall network performance.
摘要翻译： 系统提供用于检测通信网络上站的增强能力。 链路测试脉冲的指定模式被检测和发送以提供增强能力的指示。 这对于确定特定站是全双工还是半双工模式而不影响整体网络性能特别有用。
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公开(公告)号：US5432775A
公开(公告)日：1995-07-11
申请号：US161707
申请日：1993-12-03
申请人： Ian S. Crayford
发明人： Ian S. Crayford
IPC分类号： H04L5/14 , H04L5/16 , H04L12/413 , H04L29/06 , H04J3/02
CPC分类号： H04L12/40136 , H04L12/413 , H04L29/06 , H04L69/24
摘要： A system provides for detection of enhanced capabilities of stations on a communications network. A specified pattern of link test pulses are detected and transmitted to provide for the indication of enhanced capabilities. This is particularly useful for determining whether a particular station is in full duplex or half duplex mode without affecting overall network performance.
摘要翻译： 系统提供用于检测通信网络上站的增强能力。 链路测试脉冲的指定模式被检测和发送以提供增强能力的指示。 这对于确定特定站是全双工还是半双工模式而不影响整体网络性能特别有用。
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10.发明授权Automatic polarity detection and correction method and apparatus employing linkpulses 失效采用连续脉冲的自动极性检测和校正方法及装置
公开(公告)号：US5257287A
公开(公告)日：1993-10-26
申请号：US620980
申请日：1990-11-30
IPC分类号： H03M7/00 , H03K5/02 , H03K5/13 , H03K5/1534 , H03K5/156 , H03K19/0185 , H03M5/12 , H04L25/02 , H04L25/08 , H04L25/49 , H04L25/34
CPC分类号： H03K5/023 , H03K19/018578 , H03K5/13 , H03K5/1534 , H03K5/156 , H04L25/02 , H04L25/0272 , H04L25/0292 , H04L25/08 , H04L25/085 , H04L25/4904
摘要： A differential receiver incorporated into a MAU which receives both Manchester packets and linkpulses according to the IEEE 802.3 10Base-T standard has polarity detection and correction circuit for automatically detecting a reversed polarity for RD input lines. The differential receiver samples incoming pulses for time, amplitude and pulse width qualification and makes a preliminary polarity determination based upon polarity of such qualified pulses. This preliminary polarity allows a linktest state machine to transition to a link.sub.-- pass state, enabling output drivers of the MAU. Additionally, the linkpulse polarity information initially makes a polarity determination for the entire differential receiver which asserts a FIX POLARITY signal. The FIX POLARITY signal controls a correction circuit which internally remedies reversed input lines. Preferably, the correction circuit internally reroutes the signals. An ETD polarity circuit makes polarity determinations from any ETD information received, as effected by the correction circuit. The ETD polarity circuit independently controls the linkpulse polarity determinations and conflicting determinations are resolved in favor of the ETD polarity circuit. Upon detecting two consecutive, consistent valid ETDs, the ETD polarity circuit locks-in the polarity determinations until a reset or a linkfail condition. The correction circuit effects both Manchester packets and linkpulses, so an incorrectly locked polarity will produce inverted linkpulses which will not allow the MAU to remain in the link.sub.-- pass state. In the linkfail state, the MAU may reestablish the correct polarity.
摘要翻译： 根据IEEE 802.3 10Base-T标准，并入到接收曼彻斯特分组和链路脉冲的MAU中的差分接收机具有用于自动检测RD输入线的反极性的极性检测和校正电路。 差分接收器对输入脉冲进行时间，幅度和脉冲宽度鉴定，并根据这种合格脉冲的极性进行初步极性判定。 该初步极性允许链路测试状态机转换到链路通过状态，使得MAU的输出驱动器成为可能。 此外，链路脉冲极性信息最初对整个差分接收机进行极性确定，这个确定了FIX POLARITY信号。 FIX POLARITY信号控制一个校正电路，内部补救反向输入线路。 优选地，校正电路在内部重新路由信号。 ETD极性电路根据校正电路实现的任何接收的ETD信息进行极性判定。 ETD极性电路独立控制链路脉冲极性判定，冲突确定有利于ETD极性电路。 在检测到两个连续的，一致的有效ETD时，ETD极性电路锁定极性确定，直到复位或链接状态。 校正电路影响曼彻斯特数据包和链路脉冲，因此锁定不正确的极性将产生反向的链路脉冲，这将不允许MAU保持链路通过状态。 在链接状态下，MAU可能会重新建立正确的极性。
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