公开(公告)号：US4612637A

公开(公告)日：1986-09-16

申请号：US633547

申请日：1984-07-23

申请人： Christopher K. Davis ,  Paul J. Stein ,  Diana M. Ball

发明人： Christopher K. Davis ,  Paul J. Stein ,  Diana M. Ball

IPC分类号： H04J3/24 ,  H04B7/212 ,  H04L12/56 ,  H04W84/08 ,  H04J3/16

CPC分类号： H04W84/08

摘要： A multiple-access communications system for an unlimited user population wherein a system controller continuously transmits Aloha signals on a slot-by-slot basis giving an updated number of time slots available whereby a calling party can select any one of the designated time slots at random. The calling party checks the time slot immediately preceding its selected time slot to ascertain if the current Aloha number is zero (or an equivalent thereof). If it is zero then the calling party reverts to listening for a time slot containing an Aloha number greater than zero. Alternatively if it is not zero the calling party apparatus sends a signal to the system controller in its selected time slot. Multipurpose signalling in each time slot can be carried out by the system controller thereby reducing the overhead on the system and speeding-up the setting-up of calls which may be off-air or non off-air.

摘要翻译： 一种用于无限用户群的多址通信系统，其中系统控制器在逐个时隙的基础上连续发送Aloha信号，给出更新数量的可用时隙，由此主叫方可以随机选择指定的时隙中的任何一个 。 主叫方检查紧接其所选时隙之前的时隙，以确定当前的Aloha号码是否为零（或等效的）。 如果为零，则主叫方返回收听包含大于零的Aloha号码的时隙。 或者，如果不为零，则主叫方设备在其所选择的时隙中向系统控制器发送信号。 每个时隙中的多用途信令可以由系统控制器执行，从而减少系统的开销，并加快建立可能是空中或非空中的呼叫。

公开(公告)号：US4672608A

公开(公告)日：1987-06-09

申请号：US769282

申请日：1985-08-26

申请人： Diana M. Ball ,  Peter J. Mabey ,  Paul J. Stein

发明人： Diana M. Ball ,  Peter J. Mabey ,  Paul J. Stein

IPC分类号： H04J3/16 ,  H04B7/24 ,  H04L12/56 ,  H04W84/08 ,  H04J3/24

CPC分类号： H04W84/08

摘要： A method by which substations in a multiple access communication system, such as a mobile radio system, may access the base station. Access is determined by the base station in accordance with any of a plurality of operating modes during successive message time frames, the particular mode being determined by the base station from an estimate of prevailing traffic conditions. The selected operating mode during any frame is signified by a code and parameters transmitted by the base station in an Aloha invitation message which establishes such mode and the dynamic operation of the substations in that mode. The operating modes include a light traffic mode, a dynamic frame-length mode, a hybrid mode in which subsets of the population of the substations are formed, and a polling mode.

摘要翻译： 诸如移动无线电系统的多址通信系统中的变电站可以访问基站的方法。 在连续消息时间帧期间，基站根据多个操作模式中的任何一个确定接入，该特定模式由基站根据当前业务状况的估计来确定。 在任何帧期间所选择的操作模式由基站在Aloha邀请消息中发送的代码和参数表示，该请求建立这种模式和在该模式下的变电站的动态操作。 操作模式包括轻行交通模式，动态帧长模式，其中形成变电站总体子集的混合模式以及轮询模式。

公开(公告)号：US4864564A

公开(公告)日：1989-09-05

申请号：US55486

申请日：1987-05-29

申请人： John P. Parker ,  Paul J. Stein

发明人： John P. Parker ,  Paul J. Stein

IPC分类号： H04L12/56

CPC分类号： H04W88/02 ,  H04W84/18 ,  Y10S370/913

摘要： A transceiver for a packet radio network comprises a plurality of independently tunable receivers (RX1-RX4) and a single transmitter (TX) tunable to the frequencies of the receivers. Messages on different frequencies of the network can thus be simultaneously received by respective receivers, increasing message handling capacity; additionally or alternatively, one or more of the receivers can be used as an auxiliary channel for one or more functions other than standard reception of data packets. Three auxiliary channel modes are described: Voice Net mode for direct voice communication, Time Division Multiplex Repeater mode for a long-range voice link or bulk data transfer to a single destination, and inter-network gateway mode for transmitting messages to an adjacent network.

摘要翻译： 用于分组无线电网络的收发机包括多个可独立调节的接收机（RX1-RX4）和可调谐到接收机频率的单个发射机（TX）。 因此，可以由各个接收机同时接收网络不同频率的消息，增加消息处理能力; 附加地或替代地，一个或多个接收机可以用作除标准接收数据分组之外的一个或多个功能的辅助信道。 描述了三种辅助信道模式：用于直接语音通信的语音网络模式，用于远程语音链路的时分复用中继器模式或到单个目的地的批量数据传输，以及用于向相邻网络发送消息的网络间网关​​模式。

公开(公告)号：US4539646A

公开(公告)日：1985-09-03

申请号：US355635

申请日：1982-03-08

申请人： Paul J. Stein ,  Rodney W. Gibson

发明人： Paul J. Stein ,  Rodney W. Gibson

IPC分类号： H04L27/26 ,  H04W88/02 ,  G06F15/31

CPC分类号： H04W88/027

摘要： A multi-tone sequential call signal detector in which a microcomputer is used to detect the tones of a received signal by simulating digitally the response of analogue tuned circuits. The detector includes a limiter for producing a square wave signal from a tone signal, a differentiator for producing interrupt pulses, and a microcomputer which responds to the interrupt pulses to activate a visual display and a call lamp of an output circuit when it detects all the received tones of the signal. The microcomputer performs an algorithm by which it measures the period between successive interrupt pulses, determines which tone frequency has this period, starts a number count which represents the "rise" response of a tuned circuit for that tone frequency, and determines when the number count reaches a threshold number which represents the resonant condition of the tuned circuit.

摘要翻译： 一种多音调顺序呼叫信号检测器，其中微型计算机用于通过数字仿真模拟调谐电路的响应来检测接收信号的音调。 检测器包括用于从音调信号产生方波信号的限制器，用于产生中断脉冲的微分器，以及响应于中断脉冲以启动视觉显示的微型计算机以及输出电路的呼叫灯，当它检测到所有 收到信号的音调。 微型计算机执行一种算法，通过该算法测量连续中断脉冲之间的周期，确定哪个音频具有该周期，开始表示该音调频率的调谐电路的“上升”响应的数字计数，并确定何时数 达到表示调谐电路的谐振状态的阈值数。