公开(公告)号：US4698769A

公开(公告)日：1987-10-06

申请号：US698095

申请日：1985-02-04

申请人： Ross McPherson ,  Kenneth F. Smolik ,  David J. Thomson

发明人： Ross McPherson ,  Kenneth F. Smolik ,  David J. Thomson

IPC分类号： H04L27/00 ,  H04B7/26 ,  H04Q1/442 ,  H04Q1/446 ,  H04Q7/20 ,  H04Q7/38 ,  G06F7/38

CPC分类号： H04Q1/442

摘要： Supervisory audio tones received from a mobile telephone unit are converted from analog to digital form. The tone is then converted to a complex number by bifurcating the tone path and multiplying one path by a sine function and the other path by a cosine function. The complex numbers are accumulated and the frequencies where significant power exists is found using the discrete Fourier transform. If the power at an assigned frequency exceeds a threshold, the corresponding supervisory audio tone is declared to have been detected.

摘要翻译： 从移动电话单元接收到的监听音频从模拟转换成数字形式。 然后，通过将色调路径分叉并将一个路径乘以正弦函数，并将另一个路径乘以余弦函数，将该音调转换为复数。 利用离散傅立叶变换，求出复数，存在有功功率的频率。 如果分配频率的功率超过阈值，则声明相应的监控音频音被检测到。

公开(公告)号：US5278892A

公开(公告)日：1994-01-11

申请号：US7034

申请日：1993-01-21

申请人： Brian D. Bolliger ,  Talmage P. Bursh, Jr. ,  Kelvin K. Ho ,  Alan S. Mulberg ,  LaJeana N. Roberts ,  Kenneth F. Smolik ,  Douglas A. Spencer ,  Kenneth W. Strom ,  John S. Thompson

发明人： Brian D. Bolliger ,  Talmage P. Bursh, Jr. ,  Kelvin K. Ho ,  Alan S. Mulberg ,  LaJeana N. Roberts ,  Kenneth F. Smolik ,  Douglas A. Spencer ,  Kenneth W. Strom ,  John S. Thompson

IPC分类号： H04J3/06 ,  H04L7/00 ,  H04Q11/04 ,  H04W8/26 ,  H04W36/18 ,  H04M11/00 ,  H04J4/00 ,  H04M7/00

CPC分类号： H04W36/18 ,  H04W8/26

摘要： A CDMA cellular radio-telephone system (FIG. 2) comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base stations; 202) with each other and with the public telephone network (100). A unique combination of a static addressing plan that uses a different LAPD DLCI (302 in FIG. 7) for each unidirectional virtual call path, direct cell (202)-to-cell and cell-to-call-processing unit (264 in FIG. 5) control information exchanges, and packet-switching techniques that permit call traffic and control communications to share call paths and permit different call paths to share physical resources, is applied to call processing. This enables soft handoffs (FIGS. 27-29) to be handled in a manner transparent to the parties to the call and without significant involvement of system control elements (134 and 261 in FIG. 2) whose involvement would adversely impact the system's call-handling capacity. It also enables soft handoffs to occur without change of the call processing unit that is handling the call, so that a single call processing unit continues to handle the call from start to finish through even multiple soft handoffs.

摘要翻译： CDMA蜂窝无线电电话系统（图2）包括将小区（基站; 202）彼此互连并与公共电话网络（100）互连的分组交换通信网络（202,207,201）。 对于每个单向虚拟呼叫路径使用不同的LAPD DLCI（图7中的302）的静态寻址计划的独特组合，直接小区（202）到小区和小区到呼叫处理单元（图7中的264 5）控制信息交换和允许呼叫业务和控制通信共享呼叫路径并允许不同呼叫路径共享物理资源的分组交换技术被应用于呼叫处理。 这使得能够以对呼叫的各方透明的方式处理软切换（图27-29），并且不涉及系统控制元件（图2中的第134和261），其参与将不利地影响系统的呼叫 - 处理能力。 它还可以在不改变处理呼叫的呼叫处理单元的情况下实现软切换，使得单个呼叫处理单元继续通过甚至多个软切换从头到尾处理呼叫。

公开(公告)号：US5195090A

公开(公告)日：1993-03-16

申请号：US727498

申请日：1991-07-09

申请人： Brian D. Bolliger ,  Talmage P. Bursh, Jr. ,  Marc K. Dennison ,  Michael J. English ,  Charles Y. Farwell ,  Michel L. Hearn ,  Richard M. Heidebrecht ,  Kelvin K. Ho ,  Kenneth Y. Ho ,  David M. Kissel ,  Paul E. Miller ,  Richard D. Miller ,  Alan S. Mulberg ,  LaJeana N. Roberts ,  Michael A. Smith ,  Kenneth F. Smolik ,  Douglas A. Spencer ,  Kenneth W. Strom ,  John S. Thompson ,  Richard A. Windhausen

发明人： Brian D. Bolliger ,  Talmage P. Bursh, Jr. ,  Marc K. Dennison ,  Michael J. English ,  Charles Y. Farwell ,  Michel L. Hearn ,  Richard M. Heidebrecht ,  Kelvin K. Ho ,  Kenneth Y. Ho ,  David M. Kissel ,  Paul E. Miller ,  Richard D. Miller ,  Alan S. Mulberg ,  LaJeana N. Roberts ,  Michael A. Smith ,  Kenneth F. Smolik ,  Douglas A. Spencer ,  Kenneth W. Strom ,  John S. Thompson ,  Richard A. Windhausen

IPC分类号： H04J3/06 ,  H04L7/00 ,  H04Q11/04 ,  H04W36/18

CPC分类号： H04W36/18 ,  H04J3/0632

摘要： A wireless-access communications system, such as a CDMA cellular radio-telephone system (FIG. 2), comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base stations; 202) with each other and with the public telephone network (100). Traffic of individual calls is packetized, and packet-bearing frames (300 in FIG. 7) of a plurality of calls are then statistically multiplexed and frame-relayed through the network to yield the high capacity, efficiency, and speed of traffic transport and handoff required for a CDMA cellular system. At each call processing unit (264 in FIG. 5), individual calls are handled by individual service circuits (602 and 612) which perform speech-processing functions such as coding and decoding, tone insertion, and echo cancellation, and packet-to-circuit-switched-PCM traffic conversion. Processors (602) adapt call processing unit timing to compensate for asynchrony between cells and call processing units and variations in call path transmission delays. Cell-to-cell communications, fixed call path addressing, and packetized control message transfers ensure that the same service circuit handles a call through even multiple soft handoffs (FIGS. 27-29) and efficiently communicates simultaneously with all cells involved in the handoff without involvement of system control entities and negative effect on system call-handling capacity. Both coded (packet-switched) and uncoded (circuit-switched) radio-telephone traffic are accommodated side-by-side. Wherever possible, existing and proven technology and component units are used to achieve low cost and high reliability.

公开(公告)号：US4330862A

公开(公告)日：1982-05-18

申请号：US167383

申请日：1980-07-09

申请人： Kenneth F. Smolik

发明人： Kenneth F. Smolik

IPC分类号： H04L1/20 ,  H04L25/04 ,  H04L25/49

CPC分类号： H04L25/4904 ,  H04L1/20

摘要： Received baseband data signals, in the form of signals having at least one level transition per symbol indicative of symbol information state, are sampled (17) at a rate much higher than the symbol rate. The samples are used to control the direction of counting (20) of local clock (12) signals recurring at that higher rate during symbol subintervals of predetermined duration. Counts produced during adjacent subintervals are processed (FIGS. 4 and 5) to produce several different results such as recognition of the start of an asynchronously occurring data message, acquisition and tracking of symbol phase in the message, and detection of symbol information states.

摘要翻译： 接收到的基带数据信号（以具有指示符号信息状态的每符号的至少一个电平转换的信号的形式）以比符号速率高得多的速率进行采样（17）。 样本用于控制在预定持续时间的符号子间隔期间以更高速率重复的本地时钟（12）信号的计数（20）的计数方向。 处理相邻子间隔期间产生的计数（图4和图5），以产生几个不同的结果，例如识别异步发生的数据消息的开始，消息中的符号相位的获取和跟踪以及符号信息状态的检测。