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1. 发明授权

US4712214A Protocol for handling transmission errors over asynchronous communication lines 失效
标题翻译：通过异步通信线路处理传输错误的协议
公开(公告)号：US4712214A
公开(公告)日：1987-12-08
申请号：US817699
申请日：1986-01-10
申请人： Clifford B. Meltzer , Krishnamurthi Kannan , Thomas G. Burket , Deborah J. Kruesi , Gordon W. Braudaway
发明人： Clifford B. Meltzer , Krishnamurthi Kannan , Thomas G. Burket , Deborah J. Kruesi , Gordon W. Braudaway
IPC分类号： H04N7/173 , H04L1/00 , H04L1/16 , H04L29/08 , G06F11/10 , G08C25/00
CPC分类号： H04L1/0083
摘要： A system or scheme for automatic detection of and recovery from transmission errors in the asynchronous communication mode at the data link level with complete transparency at the higher levels is disclosed wherein the transmissions are in the form of a sequence of data packets, and an improved combination of end-of-text (ETX) bytes along with checksums is used in each data packet to detect errors. The ETX character is dynamically selected for each packet after the data comprising the packet has been assembled. This character is coded differently from the remaining character codes in its respective packet and is made the second byte thereof following the start-of-text byte (STX). The third byte in each packet is made the complement of the preceding ETX byte, the latter of which is also made the last byte in the packet. Thus, the second and last bytes in each packet are identical, and different from all the other bytes, and the third byte is their complement. Other bytes in each packet include: one byte indicating the location of the packet in a set in a given transmission sequence; a byte distinguishing the packet's set from other transmission sequences; two bytes indicative of the number of data bytes in the packet; one byte operating as a control character indicating the functional nature of the packet; data bytes; and, two checksum bytes which precede the last ETX byte. Among the advantages of transmissions using packets containing the foregoing improved combination of bytes, is the fact that all transmission errors will be detected and upon detection of an error in a packet, the transmitter is immediately notified and retransmission is carried out only from the erroneous packet rather than from the beginning of the entire sequence as in the prior art.
摘要翻译：公开了一种用于在具有完全透明度的数据链路级别的异步通信模式下自动检测和恢复传输错误的系统或方案，其中传输是数据分组序列的形式，并且改进的组合每个数据包中使用文本结尾（ETX）字节以及校验和来检测错误。在组合数据包的数据之后，ETX字符是为每个数据包动态选择的。该字符与其各自的分组中的剩余字符代码不同，并且使其成为文本开头字节（STX）之后的第二个字节。每个数据包中的第三个字节是前一个ETX字节的补码，后一个字节也是数据包中的最后一个字节。因此，每个分组中的第二个和最后一个字节是相同的，并且与所有其他字节不同，第三个字节是它们的补码。每个分组中的其他字节包括：指示给定传输序列中的分组中的分组的位置的一个字节; 将分组的集合与其他传输序列区分开的字节; 两个字节表示数据包中的数据字节数; 一个字节作为指示分组的功能性质的控制字符操作; 数据字节; 以及在最后一个ETX字节之前的两个校验和字节。在使用包含上述改进的字节组合的分组的传输的优点之中，是所有的传输错误将被检测到，并且在检测到分组中的错误之后，发送器立即被通知，并且仅从错误的分组而不是像现有技术那样从整个序列开始。

2. 发明授权

US4805134A Electronic system for accessing graphical and textual information 失效
标题翻译：用于访问图形和文本信息的电子系统
公开(公告)号：US4805134A
公开(公告)日：1989-02-14
申请号：US817389
申请日：1986-01-09
申请人： Seraphin B. Calo , Krishnamurthi Kannan , Suk S. Soo , Thomas G. Burket , John W. Wiley, Jr.
发明人： Seraphin B. Calo , Krishnamurthi Kannan , Suk S. Soo , Thomas G. Burket , John W. Wiley, Jr.
IPC分类号： H04N7/16 , G06F9/46 , G06F9/48 , G06F12/00 , G06F13/00 , G06F15/16 , G06F15/177 , G06F17/30 , G06F21/00 , G09B7/04 , H04L12/28 , H04L29/12 , H04M11/08
CPC分类号： G06F9/4843 , G06F21/6218 , G06F9/468 , G09B7/04 , H04M11/085
摘要： An architecture for the implementation of an information utility for accessing information and executing transactions on an interactive basis between Videotex databases and individual end user terminals, some or all of which may be remotely located with respect to each other. The utility may be associated with a Videotex Application Network (VAN) and includes a combination of distributed, semiautonomous Operations Nodes (ONs), each characterized by (1) one or more affiliated users, (2) the inclusion of some form of database, and (3) one or more customized application programs, and each is also capable of "standalone" operation. Each database comprises pages of control information and displayable data. Each node comprises a directory of databases at other nodes.
摘要翻译：用于实现用于在Videotex数据库和各个终端用户终端之间的交互式基础上访问信息和执行交易的信息实用程序的架构，其中的一些或全部可以相对于彼此远程定位。该实用程序可以与Videotex应用网络（VAN）相关联，并且包括分散的，半自动的操作节点（ON）的组合，每个操作节点（ON）的特征在于（1）一个或多个附属用户，（2）包括某种形式的数据库，和（3）一个或多个定制的应用程序，并且每个也能够“独立”操作。每个数据库包括控制信息页和可显示数据。每个节点包括其他节点上的数据库目录。

3. 发明授权

US5896506A Distributed storage management system having a cache server and method therefor 失效
标题翻译：具有缓存服务器的分布式存储管理系统及其方法
公开(公告)号：US5896506A
公开(公告)日：1999-04-20
申请号：US656441
申请日：1996-05-31
申请人： Seifu Ali , Thomas G. Burket , Tawei Hu , Gerald Edward Kozina , Thomas S. Lee
发明人： Seifu Ali , Thomas G. Burket , Tawei Hu , Gerald Edward Kozina , Thomas S. Lee
IPC分类号： G06F17/30 , G06F13/38 , G06F15/17
CPC分类号： G06F17/30067
摘要： The present invention is directed to a method and system for storing and managing objects, such as binary large objects (blobs) in a digital library system which includes a plurality of clients, an object server for storing an object, a cache server for storing a copy of the object, and a centralized server for storing information identifying the object as being stored in the object server and associating one or more of the clients with the cache server, in which one of the clients, as a requesting client, requests retrieval of an object, a copy of the requested object is sent from the cache server to the requesting client if the object is stored in said cache server, and a copy of said object is sent from the object server to said requesting client if the object is not stored in the cache server; and a copy of the requested object is sent from the object server to the cache server after the object server sends the object to the client, in which the object sent to the client is made available to the client regardless of whether sending of the copy of the object to the cache server is completed.
摘要翻译：本发明涉及用于在数字图书馆系统中存储和管理诸如二进制大对象（blob）的对象的方法和系统，所述数字图书馆系统包括多个客户端，用于存储对象的对象服务器，用于存储对象的高速缓存服务器对象的副本以及用于存储标识被存储在对象服务器中的对象的信息并将一个或多个客户端与高速缓存服务器相关联的集中式服务器，其中作为请求客户端的客户端之一请求检索如果对象存储在所述缓存服务器中，则所请求对象的副本从缓存服务器发送到请求客户端，并且如果对象不是，则将对象服务器的副本从对象服务器发送到所述请求客户端存储在缓存服务器中; 并且在对象服务器将对象发送到客户端之后，将所请求的对象的副本从对象服务器发送到缓存服务器，其中发送给客户端的对象可用于客户端，而不管是否发送副本缓存服务器的对象完成。

4. 发明授权

US5940594A Distributed storage management system having a cache server and method therefor 失效
标题翻译：具有缓存服务器的分布式存储管理系统及其方法
公开(公告)号：US5940594A
公开(公告)日：1999-08-17
申请号：US902285
申请日：1997-07-29
申请人： Seifu Ali , Thomas G. Burket , Tawei Hu , Gerald Edward Kozina , Thomas S. Lee
发明人： Seifu Ali , Thomas G. Burket , Tawei Hu , Gerald Edward Kozina , Thomas S. Lee
IPC分类号： G06F17/30 , G06F15/00
CPC分类号： G06F17/30067
摘要： The present invention is directed to a method and system for storing and managing objects, such as binary large objects (blobs) in a digital library system which includes a plurality of clients, an object server for storing an object, a cache server for storing an copy of the object, and a centralized server for storing information identifying the object as being stored in the object server and associating one or more of the clients with the cache server, in which one of the clients, as a requesting client, requests retrieval of an object, a copy of the requested object is sent from the cache server to the requesting client if the object is stored in said cache server, and a copy of said object is sent from the object server to said requesting client if the object is not stored in the cache server; and a copy of the requested object is sent from the object server to the cache server after the object server sends the object to the client, in which the object sent to the client is made available to the client regardless of whether sending of the copy of the object to the cache server is completed.
摘要翻译：本发明涉及一种用于在数字图书馆系统中存储和管理诸如二进制大对象（blob）的对象的方法和系统，该数字图书馆系统包括多个客户端，用于存储对象的对象服务器，用于存储对象的高速缓存服务器对象的副本以及用于存储标识被存储在对象服务器中的对象的信息并将一个或多个客户端与高速缓存服务器相关联的集中式服务器，其中作为请求客户端的客户端之一请求检索如果对象存储在所述缓存服务器中，则所请求对象的副本从缓存服务器发送到请求客户端，并且如果对象不是，则将对象服务器的副本从对象服务器发送到所述请求客户端存储在缓存服务器中; 并且在对象服务器将对象发送到客户端之后，将所请求的对象的副本从对象服务器发送到缓存服务器，其中发送给客户端的对象可用于客户端，而不管是否发送副本缓存服务器的对象完成。

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