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    Local area network for digital data processing system
    2.
    发明公开
    Local area network for digital data processing system 失效

    公开(公告)号：EP0380141A2

    公开(公告)日：1990-08-01

    申请号：EP90103116.1

    申请日：1985-05-24

    申请人： DIGITAL EQUIPMENT CORPORATION

    发明人： Mann, Bruce ,  Duffy, Darrell ,  Lauck, Anthony ,  Strecker, William

    IPC分类号： G06F15/16 ,  G06F13/368

    CPC分类号： H04L29/00 ,  H04L29/06 ,  H04L67/16 ,  H04L67/24 ,  H04L67/42 ,  H04L69/18 ,  H04L69/24 ,  H04L69/28 ,  H04L69/326 ,  H04L69/329

    摘要： A local area network for interconnecting terminals and other users and data processing systems and other service providers over a communications link. The users and providers connect to the communications link by means of interface units each of which may connect to several users or providers. The interface units communicate over the communications link by means of messages. When a user requires the use of a service, the interface unit establishes a virtual circuit between it and the interface unit connected to the service provider and a service session which allows the user and the service provider to communicate over the virtual circuit. If several users connected to the one interface unit as the first user require services provided by providers which connected to the same interface unit as the first provider, they communicate in sessions over the same virtual circuits. The session messages are accumulated into single virtual circuit messages that are acknowledged in unison by the receiving interface unit. Each virtual circuit in the users' interface units includes a timer which reset when a message is transmitted over the virtual circuit and a data waiting flag set whenever data is present to be transitted over the virtual circuit. The interface units are inhibited from transmitting over a virtual circuit unless the timer has timed out and the data waiting flag is set.

    Local area network for digital data processing system
    5.
    发明公开
    Local area network for digital data processing system 失效
    Lokales Netzwerkfürnumerische Datenverarbeitungssysteme。

    公开(公告)号：EP0374131A2

    公开(公告)日：1990-06-20

    申请号：EP90103117.9

    申请日：1985-05-24

    申请人： DIGITAL EQUIPMENT CORPORATION

    发明人： Mann, Bruce ,  Duffy, Darrell ,  Lauck, Anthony ,  Strecker, William

    IPC分类号： G06F15/16 ,  G06F13/368

    CPC分类号： H04L29/00 ,  H04L29/06 ,  H04L67/16 ,  H04L67/24 ,  H04L67/42 ,  H04L69/18 ,  H04L69/24 ,  H04L69/28 ,  H04L69/326 ,  H04L69/329

    摘要： A local area network for interconnecting terminals and other users and data processing systems and other service providers over a communications link. The users and providers connect to the communications link by means of interface units each of which may connect to several users or providers. The interface units communicate over the communications link by means of messages. When a user requires the use of a service, the interface unit establishes a virtual circuit between it and the interface unit connected to the service provider and a service session which allows the user and the service provider to communicate over the virtual circuit. If several users connected to the one interface unit as the first user require services provided by providers which connected to the same interface unit as the first provider, they communicate in sessions over the same virtual circuits. The session messages are accumulated into single virtual circuit messages that are acknowledged in unison by the receiving interface unit. Each virtual circuit in the users' interface units includes a timer which reset when a message is transmitted over the virtual circuit and a data waiting flag set whenever data is present to be transitted over the virtual circuit. The interface units are inhibited from transmitting over a virtual circuit unless the timer has timed out and the data waiting flag is set.

    摘要翻译： 用于通过通信链路互连终端和其他用户以及数据处理系统和其他服务提供商的局域网。 用户和提供商通过接口单元连接到通信链路，每个接口单元可以连接到多个用户或提供商。 接口单元通过消息通过通信链路进行通信。 当用户需要使用服务时，接口单元在其与连接到服务提供商的接口单元之间建立虚拟电路，以及允许用户和服务提供商通过虚拟电路进行通信的服务会话。 如果作为第一用户连接到一个接口单元的多个用户需要连接到与第一提供商相同的接口单元的提供商提供的服务，则它们在相同虚拟电路上的会话中通信。 会话消息被累积到由接收接口单元一致确认的单个虚拟电路消息中。 用户接口单元中的每个虚拟电路包括当通过虚拟电路发送消息时复位的定时器以及当通过虚拟电路传输数据时设置的数据等待标志。 除非定时器超时并且设置了数据等待标志，否则接口单元被禁止通过虚拟电路传输。

    Local area network for digital data processing system
    7.
    发明公开
    Local area network for digital data processing system 失效

    公开(公告)号：EP0374132A3

    公开(公告)日：1990-08-22

    申请号：EP90103118.7

    申请日：1985-05-24

    申请人： DIGITAL EQUIPMENT CORPORATION

    发明人： Mann, Bruce ,  Duffy, Darrell ,  Lauck, Anthony ,  Strecker,William

    IPC分类号： G06F15/16 ,  G06F13/368

    CPC分类号： H04L29/00 ,  H04L29/06 ,  H04L67/16 ,  H04L67/24 ,  H04L67/42 ,  H04L69/18 ,  H04L69/24 ,  H04L69/28 ,  H04L69/326 ,  H04L69/329

    摘要： A local area network for interconnecting terminals and other users and data processing systems and other service providers over a communications link. The users and providers connect to the communications link by means of interface units each of which may connect to several users or providers. The interface units communicate over the communications link by means of messages. When a user requires the use of a service, the interface unit establishes a virtual circuit between it and the interface unit connected to the service provider and a service session which allows the user and the service provider to communicate over the virtual circuit. If several users connected to the one interface unit as the first user require services provided by providers which connected to the same interface unit as the first provider, they communicate in sessions over the same virtual circuits. The session messages are accumulated into single virtual circuit messages that are acknowledged in unison by the receiving interface unit. Each virtual circuit in the users' interface units includes a timer which reset when a message is transmitted over the virtual circuit and a data waiting flag set whenever data is present to be transitted over the virtual circuit. The interface units are inhibited from transmitting over a virtual circuit unless the timer has timed out and the data waiting flag is set.

    Local area network for digital data processing system
    8.
    发明公开
    Local area network for digital data processing system 失效
    数字数据处理系统的局域网

    公开(公告)号：EP0374133A2

    公开(公告)日：1990-06-20

    申请号：EP90103120.3

    申请日：1985-05-24

    申请人： DIGITAL EQUIPMENT CORPORATION

    发明人： Mann, Bruce ,  Duffy, Darrell ,  Lauck, Anthony ,  Strecker, William

    IPC分类号： G06F15/16

    CPC分类号： H04L29/00 ,  H04L29/06 ,  H04L67/16 ,  H04L67/24 ,  H04L67/42 ,  H04L69/18 ,  H04L69/24 ,  H04L69/28 ,  H04L69/326 ,  H04L69/329

    摘要： A local area network for interconnecting terminals and other users and data processing systems and other service providers over a communications link. The users and providers connect to the communications link by means of interface units each of which may connect to several users or providers. The interface units communicate over the communications link by means of messages. When a user requires the use of a service, the interface unit establishes a virtual circuit between it and the interface unit connected to the service provider and a service session which allows the user and the service provider to communicate over the virtual circuit. If several users connected to the one interface unit as the first user require services provided by providers which connected to the same interface unit as the first provider, they communicate in sessions over the same virtual circuits. The session messages are accumulated into single virtual circuit messages that are acknowledged in unison by the receiving interface unit. Each virtual circuit in the users' interface units includes a timer which reset when a message is transmitted over the virtual circuit and a data waiting flag set whenever data is present to be transitted over the virtual circuit. The interface units are inhibited from transmitting over a virtual circuit unless the timer has timed out and the data waiting flag is set.

    摘要翻译： 用于通过通信链路互连终端和其他用户以及数据处理系统和其他服务提供商的局域网。 用户和提供者通过接口单元连接到通信链路，每个接口单元可以连接到几个用户或提供者。 接口单元通过通信链路通过消息进行通信。 当用户需要使用服务时，接口单元在它与连接到服务提供商的接口单元之间建立虚拟电路，并且允许用户和服务提供商通过虚拟电路进行通信的服务会话。 如果作为第一用户连接到一个接口单元的几个用户需要由连接到与第一提供商相同的接口单元的提供商提供的服务，则它们通过相同的虚拟电路在会话中进行通信。 会话消息被累积成由接收接口单元一致确认的单个虚拟电路消息。 用户接口单元中的每个虚拟电路包括定时器，当在虚拟电路上发送消息时该定时器被重置，并且每当存在数据以在虚拟电路上转换时设置数据等待标志。 除非定时器超时并且数据等待标志被设置，否则禁止接口单元在虚拟电路上传输。

    Local area network for digital data processing system
    10.
    发明公开
    Local area network for digital data processing system 失效

    公开(公告)号：EP0375664A3

    公开(公告)日：1990-08-16

    申请号：EP90103119.5

    申请日：1985-05-24

    申请人： DIGITAL EQUIPMENT CORPORATION

    发明人： Mann, Bruce ,  Duffy, Darrell ,  Lauck, Anthony ,  Strecker, William

    IPC分类号： G06F15/16

    CPC分类号： H04L29/00 ,  H04L29/06 ,  H04L67/16 ,  H04L67/24 ,  H04L67/42 ,  H04L69/18 ,  H04L69/24 ,  H04L69/28 ,  H04L69/326 ,  H04L69/329

    摘要： A local area network for interconnecting terminals and other users and data processing systems and other service providers over a communications link. The users and providers connect to the communications link by means of interface units each of which may connect to several users or providers. The interface units communicate over the communications link by means of messages. When a user requires the use of a service, the interface unit establishes a virtual circuit between it and the interface unit connected to the service provider and a service session which allows the user and the service provider to communicate over the virtual circuit. If several users connected to the one interface unit as the first user require services provided by providers which connected to the same interface unit as the first provider, they communicate in sessions over the same virtual circuits. The session messages are accumulated into single virtual circuit messages that are acknowledged in unison by the receiving interface unit. Each virtual circuit in the users' interface units includes a timer which reset when a message is transmitted over the virtual circuit and a data waiting flag set whenever data is present to be transitted over the virtual circuit. The interface units are inhibited from transmitting over a virtual circuit unless the timer has timed out and the data waiting flag is set.