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公开(公告)号：US06298220B1
公开(公告)日：2001-10-02
申请号：US09231071
申请日：1999-01-14
IPC分类号： H04B100
CPC分类号： H04W52/08 , H04B7/18543
摘要： A system for controlling/conserving signal transmission power in a communications system is disclosed. The system generally includes a first unit having a transmitter and a receiver, a second unit having a transmitter and a receiver, a forward communications channel between the first unit transmitter and the second unit receiver, and a reverse communications channel between the second unit transmitter and the first unit receiver. In operation, the system determines the received signal power needs of the second unit receiver. It then generates a reverse channel explicit-power-request command based on the determination of the received signal power needs of the second unit receiver. The reverse channel explicit-power-request command represents an absolute power level at which the first unit transmitter should transmit signals over the forward communications channel. In general, this reverse channel explicit-power-request command communicates the absolute power level in a manner that is independent of the power level at which the first unit transmitter had previously been transmitting with. The system also generates a forward channel explicit-power-notification message based on a determination of the transmitted signal power from the first unit transmitter. The forward channel explicit-power-notification message represents an absolute power level at which the first unit transmitter is transmitting signals over the forward communications channel.
摘要翻译： 公开了一种在通信系统中控制/节省信号传输功率的系统。 该系统通常包括具有发射机和接收机的第一单元，具有发射机和接收机的第二单元，第一单元发射机和第二单元接收机之间的前向通信信道，以及第二单元发射机和 第一单元接收器。 在操作中，系统确定第二单元接收机的接收信号功率需求。 然后，基于对第二单元接收机的接收信号功率需求的确定，生成反向信道显式功率请求命令。 反向信道显式功率请求命令表示第一单元发射机应该在正向通信信道上传输信号的绝对功率电平。 通常，该反向信道显式功率请求命令以与第一单元发射机先前已经发送的功率电平无关的方式传送绝对功率电平。 该系统还基于来自第一单元发射机的发送信号功率的确定，生成前向信道显式功率通知消息。 前向信道显式功率通知消息表示第一单元发射机正在通过前向通信信道发送信号的绝对功率电平。
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公开(公告)号：US4768188A
公开(公告)日：1988-08-30
申请号：US824942
申请日：1986-02-03
CPC分类号： H04J3/08 , H04Q11/04 , H04Q2213/13332
摘要： A distributed, demand access local loop telephone system is disclosed. An optical fiber, or fibers, connect a central office and a plurality of remote units which are located near subscriber populations. Communications on the fiber is by high speed digital data stream which is comprised of a plurality of bit multiplexed PCM channels, each of bandwidth equivalent to a VF channel or greater. The remote units are connected to the subscriber equipment (e.g. telephones or other data sources/sinks) by subscriber dedicated links (e.g. wire pairs or other cabling), and the remote units may be added, subtracted, or moved along the fiber path to reconfigure the overall system. Because of the demand access nature, the fiber bandwidth can be dynamically redistributed among the remote access units at high speed and controlled at the central office. The topology of the system can also be reconfigured, within limits, from a central site. The system is T1 compatible, the data stream being the resultant of a plurality of T1 streams, and means is provided at the remote units for extracting and inserting one or more VF equivalent channels in any desired number up to and including an entire T 1 equivalent group.
摘要翻译： 公开了一种分布式需求接入本地环路电话系统。 光纤或光纤连接中心局和位于用户群附近的多个远程单元。 光纤上的通信是由多个位多路复用PCM信道组成的高速数字数据流，每个带宽等于VF信道或更大。 远程单元通过用户专用链路（例如线对或其他布线）连接到用户设备（例如电话或其他数据源/汇），并且可以沿着光纤路径添加，减去或移动远程单元以重新配置 整体系统。 由于需求访问性质，光纤带宽可以在远程访问单元之间以高速度动态重新分配，并在中心局进行控制。 系统的拓扑结构也可以在中心站点的范围内进行重新配置。 系统T1兼容，数据流是多个T1流的结果，并且在远程单元处提供装置，用于提取和插入任何所需数量的一个或多个VF等效信道，直到并包括整个T 1等价物 组。
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公开(公告)号：US5912892A
公开(公告)日：1999-06-15
申请号：US706159
申请日：1996-08-30
CPC分类号： H04L49/107 , H04L49/25 , H04L49/3009 , H04L49/309 , H04Q11/0478 , H04L2012/5624 , H04L2012/5685 , Y10S370/905
摘要： A method of routing Asynchronous Transfer Mode (ATM) connections in a network. A Virtual Path Index (VPI) and a Virtual Channel Index (VCI) identify connections in the network. The bits of the VPI and VCI are selectively allocated, allowing for an increased number of paths in the network. Fractional paths are thereby created, increasing the routing capabilities of the network. Multiplexing of paths in the network further enhances the network routing capability. Cells containing data are switched on the connections in the network. A plurality of tables in the ATM hardware stores a VPI value and a value representing the number of significant bits allocated to the VPI for the purpose of switching cells. Cells with the same VPI are routed over the same paths as dictated in part by the values in the corresponding tables.
摘要翻译： 一种在网络中路由异步传输模式（ATM）连接的方法。 虚拟路径索引（VPI）和虚拟信道索引（VCI）标识网络中的连接。 选择性地分配VPI和VCI的比特，从而允许网络中的路径数量增加。 从而创建分数路径，增加网络的路由能力。 网络中的路径多路复用进一步增强了网络路由能力。 包含数据的单元在网络中的连接上被切换。 ATM硬件中的多个表存储VPI值和代表分配给VPI的有效比特数的值，用于切换小区。 具有相同VPI的单元按照相应表中的值部分指定的相同路径进行路由。
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