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    Digital communication network with a moderator station election process
    2.
    发明授权
    Digital communication network with a moderator station election process 失效
    数字通信网络与主持人选举过程

    公开(公告)号：US5471461A

    公开(公告)日：1995-11-28

    申请号：US54581

    申请日：1993-04-28

    申请人： Jonathan R. Engdahl ,  Mark A. Lucak ,  David J. Gee ,  Paul Kucharski

    发明人： Jonathan R. Engdahl ,  Mark A. Lucak ,  David J. Gee ,  Paul Kucharski

    IPC分类号： G05B19/042 ,  H04L12/24 ,  H04L12/407

    CPC分类号： H04L12/4035 ,  G05B19/0421 ,  H04L12/24 ,  H04L41/00 ,  H04L12/407

    摘要： A moderator on a communication network periodically transmits a set of parameters for a protocol that is used to communicate over the network. Each node on the network compares the set of protocol parameters from the moderator to a set of parameters stored in that node. If the sets of parameters at a given node do not match, that given node ceases transmitting messages over the network until either the set of protocol parameters from the moderator match the stored set of parameters, or a matching set of parameters is stored in the node. Typically the active node that is assigned the lowest numerical network address functions as the moderator. However, an automatic process is utilized to prevent a node with a non-matching set of the protocol parameters from becoming the moderator for more than a brief period of time. An override procedure is provided to force all the nodes on the network to adopt a common set of protocol parameters in the event that the automatic process fails.

    摘要翻译： 通信网络上的主持人周期性地发送用于通过网络通信的协议的一组参数。 网络上的每个节点将来自主持人的协议参数集合与存储在该节点中的一组参数进行比较。 如果给定节点上的参数集合不匹配，则该给定节点停止通过网络发送消息，直到来自主持人的一组协议参数与存储的参数集匹配，或者将一组匹配的参数存储在节点中 。 通常，分配最低数字网络地址的主动节点用作主持人。 然而，使用自动处理来防止具有协议参数的不匹配集合的节点在短时间内成为主持人。 在自动进程失败的情况下，提供覆盖程序以强制网络上的所有节点采用一组公共协议参数。

    Communication network interface with screeners for incoming messages
    3.
    发明授权
    Communication network interface with screeners for incoming messages 失效
    通信网络接口，带有入门消息的筛选器

    公开(公告)号：US5400331A

    公开(公告)日：1995-03-21

    申请号：US54944

    申请日：1993-04-28

    申请人： Mark A. Lucak ,  Jonathan R. Engdahl ,  David J. Gee ,  Hassan A. Chami ,  Donald S. Pieronek

    发明人： Mark A. Lucak ,  Jonathan R. Engdahl ,  David J. Gee ,  Hassan A. Chami ,  Donald S. Pieronek

    IPC分类号： H04L12/18 ,  H04L29/06 ,  H04J3/02 ,  H04L12/56

    CPC分类号： H04L29/06

    摘要： Each message carried by a communication network has a packet that contains data, a tag, and a generation count wherein duplicate packets sent in different messages have identical generation counts. A station includes a modem that connects to the communication network in order to receive messages. A fixed screener circuit has a first memory that stores a set of tag values and a fixed screener determines when a packet tag matches a tag value in the first memory. The station also has an interface through which tag values are received from an external device, such as a host computer. A general purpose screener includes a second memory with a plurality of storage locations in which to store tag values from the interface and a generation count associated with each tag value. A first comparator in the general purpose screener determines when a tag contained in a packet matches a tag value in the second memory, and a second comparator determines when a generation count in the packet matches the generation count in the second memory that is associated with the matching tag value. A control circuit produces a signal when the first comparator indicates a tag match and the second comparator indicates that the generation counts do not match. The station ignores the packet in the absence of the signal.

    摘要翻译： 由通信网络携带的每个消息具有包含数据，标签和生成计数的分组，其中在不同消息中发送的重复分组具有相同的生成计数。 站点包括连接到通信网络以便接收消息的调制解调器。 固定筛选器电路具有存储一组标签值的第一存储器，并且固定筛选器确定分组标签何时与第一存储器中的标签值匹配。 该站还具有从诸如主机的外部设备接收标签值的接口。 通用筛选器包括具有多个存储位置的第二存储器，其中存储来自接口的标签值和与每个标签值相关联的生成计数。 通用筛选器中的第一比较器确定包含在分组中的标签何时与第二存储器中的标签值匹配，并且第二比较器确定分组中的生成计数何时与第二存储器中的生成计数匹配， 匹配标签值。 当第一比较器指示标签匹配并且第二比较器指示生成计数不匹配时，控制电路产生信号。 在没有信号的情况下，电台忽略数据包。

    Method and apparatus for exchanging different classes of data during different time intervals
    7.
    发明授权
    Method and apparatus for exchanging different classes of data during different time intervals 失效
    用于在不同时间间隔内交换不同类别数据的方法和装置

    公开(公告)号：US5553095A

    公开(公告)日：1996-09-03

    申请号：US54582

    申请日：1993-04-28

    申请人： Jonathan R. Engdahl ,  David J. Gee ,  Mark A. Lucak ,  Shawn L. Adams

    发明人： Jonathan R. Engdahl ,  David J. Gee ,  Mark A. Lucak ,  Shawn L. Adams

    IPC分类号： G05B19/042 ,  H04L12/417 ,  H04B1/38 ,  H04J3/02

    CPC分类号： H04L12/40013 ,  G05B19/0421 ,  H04L12/40143 ,  H04L12/4035 ,  H04L12/40026 ,  H04L12/407

    摘要： A digital communication network carries high and low priority data. The network stations that produce high priority data are assigned to a first group of stations and stations that produce low priority data are assigned to a second group with the two group not being mutually exclusive. Activity on the network is divided into periodic intervals of the same duration. Network control information, that defines how access to the medium, is determined is broadcast to all stations during a first segment of a periodic interval. The network control information defines the length of the periodic interval and of the periodic interval segments, and defines how many stations are in each group. Then during a second segment of the periodic interval, every station in the first group is afforded an opportunity, in a predefined order, to transmit high priority data over the medium. Stations in the second group are afforded an opportunity to transmit low priority data, when time remains after the first segment in a periodic interval before the network control information will be transmitted again. The specific station in the second group which is afforded an opportuinity to transmit first changes from periodic interval to periodic interval.

    摘要翻译： 数字通信网络承载高优先级数据和低优先级数据。 产生高优先级数据的网络站被分配给第一组站，并且产生低优先级数据的站被分配给具有两个组不相互排斥的第二组。 网络上的活动划分为相同持续时间的周期性间隔。 在定期间隔的第一段期间，广播所有站的网络控制信息，其定义如何访问介质。 网络控制信息定义周期性间隔和周期性间隔段的长度，并定义每组中的站数。 然后在周期性间隔的第二段期间，第一组中的每个站以预定义的顺序提供通过介质传送高优先级数据的机会。 在再次发送网络控制信息之前，第二组中的站点可以传送低优先级数据，时间保持在第一段之后的周期性间隔。 第二组中的特定站提供了从周期性间隔向周期性间隔发送第一次更改的机会。

    Media access controller with a shared class message delivery capability
    8.
    发明授权
    Media access controller with a shared class message delivery capability 失效
    具有共享类消息传递功能的媒体访问控制器

    公开(公告)号：US5491531A

    公开(公告)日：1996-02-13

    申请号：US54703

    申请日：1993-04-28

    申请人： Shawn L. Adams ,  Timothy Siorek ,  Mark A. Lucak

    发明人： Shawn L. Adams ,  Timothy Siorek ,  Mark A. Lucak

    IPC分类号： H04L12/407 ,  H04L7/00 ,  H04J3/16 ,  H04J3/24

    CPC分类号： H04L12/40013 ,  H04L49/90

    摘要： Activity on a digital communication network is divided into periodic intervals, that are further subdivided into first and second phases during which different classes of data are transmitted. A media access controller for a station on the network has an interface that connects to an external device which supplies first and second classes of data for transmission over the network. A first memory stores the first class of data and a second memory stores the second class of data. The external device supplies a third class of data that may be transmitted over the network during either the first or second phases. The third class of data is held in a third memory. A transmitter connects the three memories to the interface in order to send data over the network. A control circuit regulates the transfer of data from the memories to the transmitter, with data being transferred from the first memory when the media access controller has access to the network during one of the first phases. Data is transferred from the second memory when the media access controller has access to the network during one of the second phases, while data in the said third memory is transmitted when the media access controller has access to the network during either of the first or second phases. The transfer of data is governed by three pointers that indicate the amount of data within the memories that has been released for transmission by the device.

    摘要翻译： 数字通信网络上的活动被划分为周期性间隔，其被进一步细分为第一和第二阶段，在该阶段期间传送不同类别的数据。 用于网络上的站的媒体访问控制器具有连接到外部设备的接口，该外部设备提供第一和第二类数据以通过网络传输。 第一存储器存储第一类数据，第二存储器存储第二类数据。 外部设备提供可以在第一阶段或第二阶段期间通过网络发送的第三类数据。 第三类数据被保存在第三存储器中。 发射机将三个存储器连接到接口，以便通过网络发送数据。 控制电路调节从存储器到发送器的数据传输，当媒体访问控制器在第一阶段之一期间访问网络时，数据从第一存储器传送。 当介质访问控制器在第二阶段中的一个阶段期间访问网络时，从第二存储器传送数据，而当媒体访问控制器在第一或第二阶段期间访问网络时，传送所述第三存储器中的数据 阶段 数据传输由三个指针指示，这三个指针指示已经释放以供设备传输的存储器内的数据量。