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1. 发明授权

US5177739A Multiport - multipoint digital data service 失效
标题翻译： MULTIPORT - 多点数字数据服务
公开(公告)号：US5177739A
公开(公告)日：1993-01-05
申请号：US513353
申请日：1990-04-20
申请人： Rogelio J. Basnuevo , Jose R. Diaz , Norman J. Donaghue , Jorge A. Valdes , Stephen J. Winter
发明人： Rogelio J. Basnuevo , Jose R. Diaz , Norman J. Donaghue , Jorge A. Valdes , Stephen J. Winter
IPC分类号： H04J3/06 , H04J3/16 , H04J3/22
CPC分类号： H04J3/0682
摘要： In a Digital Data System (DDS) a method and apparatus for providing multipoint multiport service. Differences in time delays through the network are compensated by an alignment training wherein the delays from each remote station are measured at a Central station. The Central station determines how much delay to insert at each remote station and then instructs the remote stations to insert the delays. This allows all inbound data to be aligned in time so that when the data are combined within the network by the Multipoint Junction Units (MJU) data errors are not produced. Aligned frames are combined in the MJU operating in data mode in a logical AND operation so that marks transmitted by inactive ports are combined with data from active ports to produce a composite signal which is passed to the Central DSU.
摘要翻译：在数字数据系统（DDS）中，提供多点多端口服务的方法和装置。通过对准训练补偿通过网络的时间延迟的差异，其中来自每个远程站的延迟在中央站测量。中央站确定在每个远程站插入多少延迟，然后指示远程站插入延迟。这允许所有入站数据在时间上对准，使得当数据通过多点连接单元（MJU）在网络内组合时，不会产生数据错误。对齐的帧在逻辑与操作中以数据模式操作的MJU中组合，使得由非活动端口发送的标记与来自活动端口的数据组合以产生传递到中央DSU的复合信号。

2. 发明授权

US5541933A Auto-detection of DDS service and line rate 失效
标题翻译：自动检测DDS服务和线路速率
公开(公告)号：US5541933A
公开(公告)日：1996-07-30
申请号：US60764
申请日：1993-05-11
申请人： Rogelio J. Basnuevo , Jorge A. Valdes
发明人： Rogelio J. Basnuevo , Jorge A. Valdes
IPC分类号： H04J3/06 , H04J3/12 , H04J3/14
CPC分类号： H04J3/14 , H04J3/0602 , H04J3/12
摘要： Disclosed is a Digital Service Unit (DSU) which, in response to a digital signal from a Digital Data System (DDS) network, uses different techniques for different possible DDS services (include DDS-SC, CC64, and basic DDS services) to determine the type of DDS service providing the digital signal services and the line rates for such services. With respect to DDS-SC service, the DSU utilizes the fact that this DDS-SC service provides network defined frames of data to which the DSU tries establish frame synchronization at different line rates. The DSU also resolves the fact the DDS-SC service and CC64 service have the same 72 KBPS line rate by detecting the presence or absence of a control bit. For Basic DDS service, the DSU monitors the received signal for a plurality of possible invalid conditions. For each line rate, an error counter for that line rate is incremented each time an invalid condition is detected. After all the rates are checked, the DSU selects the line rate of the Basic DDS service with the least number of invalid occurrences.
摘要翻译：公开了一种数字服务单元（DSU），其响应于来自数字数据系统（DDS）网络的数字信号，为不同的可能DDS服务（包括DDS-SC，CC64和基本DDS服务）使用不同的技术来确定提供数字信号服务的DDS服务的类型和此类服务的线路速率。关于DDS-SC服务，DSU利用这样的事实，即该DDS-SC服务提供网络定义的数据帧，DSU尝试以不同的线路速率建立帧同步。 DSU还通过检测控制位的存在或不存在来解决DDS-SC服务和CC64服务具有相同的72 KBPS线速率的事实。对于基本DDS服务，DSU监视接收信号的多个可能的无效条件。对于每个线路速率，每次检测到无效条件时，该线路速率的错误计数器将递增。检查所有费率后，DSU选择基本DDS服务的线路速率最少的无效次数。

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