-
公开(公告)号：US4992783A
公开(公告)日：1991-02-12
申请号：US176951
申请日：1988-04-04
CPC分类号： H04W12/06 , H04L63/083
摘要： All subscribers operating within a communication system initially generate and transmit a random password and their ID code to the operation (control) center of a communication system. Thereafter, in a first embodiment, subscribers are commanded to modify (in a predetermined manner) and re-transmit their password and ID code either periodically or upon requesting access to the communication system. The modified password is retained as the current (authorized) password by both the subscriber and the system. In a second embodiment, subscribers are commanded to generate and transmit a new random password and their ID code to the system, which maintains a history of each subscriber's current and previous passwords. According to the invention, some of the subscribers having an unauthorized (duplicated) ID code may be inactive (off) when the subscriber is commanded to modify or generate a password. In this way, one of the subscribers having an unauthorized (duplicated) ID code will become out-of-sync with the system, and eventually transmit an unauthorized password. When the system receives an incorrect password for an out-of-sync subscriber, access to the communication system may be denied, and the subscribers that duplicate (or permit others to duplicate) ID codes may be identified.
-
公开(公告)号：US4677656A
公开(公告)日：1987-06-30
申请号：US622332
申请日：1984-06-19
摘要： A telephone interconnect system for a two-way radio communications system is disclosed. A telephone patch interconnect unit accepts dialed digits from a telephone line, encodes them into a data packet, and couples the data packet to a fixed transceiver for transmission to remote units. A remote unit with a digit sequence identification matching the received and decoded dialed digit activates an alert. A remote unit may generate and store digits corresponding to a desired telephone number. The digits are subsequently encoded into a data packet and transmitted to the telephone patch interconnect unit. The interconnect unit accepts, acknowledges and decodes the data packet and couples the resulting digits to the telephone line.
摘要翻译： 公开了一种用于双向无线电通信系统的电话互连系统。 电话线路互连单元接受来自电话线路的拨号数字，将它们编码成数据分组，并将数据分组耦合到固定收发器以传输到远程单元。 具有与接收和解码的拨号数字匹配的数字序列标识的远程单元激活警报。 远程单元可以生成并存储对应于所需电话号码的数字。 这些数字随后被编码成数据包并传送到电话补丁互连单元。 互连单元接受，确认和解码数据包，并将结果数字耦合到电话线。
-
公开(公告)号：US4468813A
公开(公告)日：1984-08-28
申请号：US446890
申请日：1982-12-06
IPC分类号： G10L11/00 , G10L20060101 , H04B20060101 , H04B7/26 , H04Q7/38 , G10L1/08
CPC分类号： H04B7/26
摘要： A digital voice storage system adapted for use in a multiple unit land mobile radio communications system. The system utilizes a PSK signalling system with fixed length data packets to control a system capable of multiple message storage of speech at mobile stations. Up to eight 64K dynamic RAMS are used in conjunction with a microprocessor to store up to 42 seconds of speech comprising up to eight separate messages. In addition, the system permits base interrogation of mobiles to determine if a message has been stored for review by the base operator and to determine the remaining recording capacity and total recording capacity of the mobile.
摘要翻译： 一种适用于多单元陆地移动无线电通信系统的数字语音存储系统。 该系统利用具有固定长度数据分组的PSK信令系统来控制能够在移动站处多个语音消息存储的系统。 多达8个64K动态RAMS与微处理器结合使用，最多可存储42秒的语音，最多可包含八个单独的消息。 此外，系统允许移动台的基本询问以确定消息是否已被存储以供基地操作者审查并确定移动台的剩余记录容量和总记录容量。
-
公开(公告)号：US5712868A
公开(公告)日：1998-01-27
申请号：US906785
申请日：1992-06-30
申请人： Morton Stern , John S. Csapo , David Edward Borth , Charles N. Lynk, Jr. , John Richard Haug , Eric R. Schorman , Phillip David Rasky , Walter Joseph Rozanski, Jr.
发明人： Morton Stern , John S. Csapo , David Edward Borth , Charles N. Lynk, Jr. , John Richard Haug , Eric R. Schorman , Phillip David Rasky , Walter Joseph Rozanski, Jr.
CPC分类号： H04B7/2643 , H04W88/10
摘要： The dual mode communication network comprises a first communication system having a frame structure and a first traffic channel protocol and a second communication system having the frame structure and a second traffic channel protocol. In the network, only one of the first and second traffic channel protocols supports forward error correction coding.
摘要翻译： 双模式通信网络包括具有帧结构和第一业务信道协议的第一通信系统和具有帧结构和第二业务信道协议的第二通信系统。 在网络中，第一和第二业务信道协议中只有一个支持前向纠错编码。
-
5.发明授权Transmission trunked radio system with voice buffering and off-line dialing 失效具有语音缓冲和离线拨号的传输集群无线电系统
公开(公告)号：US4821310A
公开(公告)日：1989-04-11
申请号：US136601
申请日：1987-12-22
IPC分类号： H04L12/56 , H04W4/10 , H04W4/12 , H04W28/14 , H04W72/04 , H04W74/00 , H04W76/02 , H04W84/08 , H01Q7/04
CPC分类号： H04W72/044 , H04W76/02 , H04W84/08 , H04W28/14 , H04W4/10 , H04W4/12 , H04W72/04 , H04W72/0413 , H04W74/00 , H04W76/005
摘要： A trunked radio subscriber requesting dispatch service transmits a request for a channel and immediately begins to speak without waiting to receive permission to access the channel. The subscriber radio locally records the information to be transmitted and, upon being assigned a channel, begins to reproduce and transmit the information. Recording and reproduction provides delay to span the time between request for and assignment to a channel and eliminates the need for the subscriber to wait to transmit or to quickly seize a channel assigned after an initial refusal. This enhances overall response time and increases time available for transmitting information signals. During interconnect calling, a trunked system alternately assigns inbound and outbound frequencies only as required for back-and-forth communication between simplex radio and duplex wireline subscribers. Voice buffering allows the parties to begin talking during the delay between request for and assignment of frequencies. The invention further provides for call origination by either radio or wireline subscribers without use of information channels. These procedures release resources and make them available to other callers.
-
公开(公告)号：US4684941A
公开(公告)日：1987-08-04
申请号：US684999
申请日：1984-12-21
IPC分类号： G06F15/16 , G06F13/14 , G06F13/42 , G06F15/173 , H04B1/38 , H04B1/40 , H04B7/26 , H04L12/00 , H04L29/02 , H04L29/06 , H04L29/14 , H04Q9/00 , H04W88/02 , H04Q7/00
CPC分类号： H04W88/02 , G06F13/4291
摘要： A register-modelled radio system comprising a plurality of register-modelled processors having addressable registers for modelling the virtual state of the processor; a serial bus, interconnecting the register-modelled processors for communicating between the addressable registers; and a communications protocol for passing information to or from the addressable registers, whereby the virtual state of a radio portion may be determined or altered by, respectively, communicating information from or to the addressable registers. The communications protocol further comprises an information packet having an address, an operation code, optional data, and an error detection device, such as a cyclical redundancy check packet. The operation code is chosen from the group of primitive operation codes reset, read, write, bit set, bit clear, acknowledge, and negative acknowledge.
摘要翻译： 一种寄存器建模的无线电系统，包括多个具有可寻址寄存器的寄存器建模的处理器，用于对处理器的虚拟状态进行建模; 一个串行总线，互连注册模型处理器，用于在可寻址寄存器之间进行通信; 以及用于将信息传递到可寻址寄存器或从可寻址寄存器传递信息的通信协议，由此可以通过分别从可寻址寄存器传送信息来确定或改变无线电部分的虚拟状态。 通信协议还包括具有地址，操作码，可选数据以及诸如循环冗余校验分组之类的错误检测装置的信息分组。 操作码从原始操作码组复位，读取，写入，位置1，清零，确认和否定确认中选择。
-
7.发明授权Method and apparatus for correcting a measured round-trip delay time in a wireless communication system 失效用于在无线通信系统中校正测量的往返延迟时间的方法和装置
公开(公告)号：US5974057A
公开(公告)日：1999-10-26
申请号：US941783
申请日：1997-09-30
IPC分类号： H04B1/7115 , H04B7/01 , H04B17/00 , H04J3/06 , H04L7/00
CPC分类号： H04J3/0682 , H04B17/364 , H04B1/7115
摘要： Correction of a round-trip delay within a communication system (100) takes place by receiving an uplink communication signal (119) over uplink communication signal paths (130-132) and determining what ray was utilized by a remote unit (113) in time aligning the uplink communication signal (119). In particular, a base station (101) analyzes the uplink communication signal (119) and predicts the ray that the remote unit (113) utilized for time alignment. Once the base station (101) has determined the ray that the remote unit (113) utilized in time alignment, the base station (101) corrects any calculation of round-trip delay accordingly.
摘要翻译： 通过在上行链路通信信号路径（130-132）上接收上行链路通信信号（119）并且及时确定远程单元（113）利用的射线来进行通信系统（100）内的往返延迟的校正 对准上行链路通信信号（119）。 特别地，基站（101）分析上行链路通信信号（119），并且预测用于时间对准的远程单元（113）的射线。 一旦基站（101）已经确定了远程单元（113）在时间对准中使用的射线，则基站（101）相应地校正往返延迟的任何计算。
-
公开(公告)号：US5467382A
公开(公告)日：1995-11-14
申请号：US250978
申请日：1994-05-31
申请人： Eric R. Schorman
发明人： Eric R. Schorman
摘要： A system for clone detection within a communication system includes a message generator for generating a message to a subscriber having a first identifier and forwarding the message for transmission over plural communications channels, a memory for receiving and storing a response to the message from each subscriber using the first identifier, and a processor for determining if an unauthorized subscriber is using the first identifier from the stored responses to the message.
摘要翻译： 用于在通信系统内进行克隆检测的系统包括消息发生器，用于向具有第一标识符的用户生成消息，并转发消息以在多个通信信道上传输;存储器，用于从每个订户接收并存储对该消息的响应， 第一标识符和用于确定未授权订户是否从存储的对消息的响应中使用第一标识符的处理器。
-
公开(公告)号：US5054078A
公开(公告)日：1991-10-01
申请号：US489144
申请日：1990-03-05
申请人： Eric R. Schorman , Kevin M. Laird
发明人： Eric R. Schorman , Kevin M. Laird
IPC分类号： H03G3/32
CPC分类号： H03G3/32
摘要： A communication device (10) comprises an input for receiving a first audio signal (12) and an input (36) for receiving a second audio signal. The communication device (10) also includes a circular buffer (34) for storing the output digital audio signal (12) and for producing an output audio signal (20). The communication device (10) determines whether at least a portion of the output audio signal (20) is present in the second audio signal. If such a portion is present, the communication device (10) subtracts the portion of the output audio signal (20) from the second audio signal, to produce a third audio signal (26). A threshold detector, responsive to the third audio signal, produces a first control signal, when the level of the third audio signal increases to at least a first predetermined level, and a second control signal, when the level of the third audio signal decreases to a value lower than a second predetermined level, where the second predetermined level is lower than the first predetermined level. Finally, a buffer control (22 ) causes the buffer (34) to suspend production of the output audio signal in response to the first control signal, and causes the buffer (34) to resume production of the audio signal (12), in response to the second control signal.
摘要翻译： 通信设备（10）包括用于接收第一音频信号（12）和用于接收第二音频信号的输入（36）的输入。 通信设备（10）还包括用于存储输出数字音频信号（12）并用于产生输出音频信号（20）的循环缓冲器（34）。 通信设备（10）确定输出音频信号（20）的至少一部分是否存在于第二音频信号中。 如果存在这样的部分，则通信设备（10）从第二音频信号中减去输出音频信号（20）的一部分，以产生第三音频信号（26）。 当第三音频信号的电平增加到至少第一预定电平时，响应于第三音频信号的阈值检测器产生第一控制信号，当第三音频信号的电平降低到 低于第二预定水平的值，其中第二预定水平低于第一预定水平。 最后，缓冲器控制（22）响应于第一控制信号使缓冲器（34）暂停输出音频信号的产生，并响应于缓冲器（34）重新产生音频信号（12） 到第二控制信号。
-
公开(公告)号：US4754450A
公开(公告)日：1988-06-28
申请号：US843882
申请日：1986-03-25
CPC分类号： H04B1/66 , H04J3/1688
摘要： A time division multiplexed (TDM) communication system is disclosed, which apportions radio frequency communication channels into at least two time slots. Voice signals for transmission on this system are analyzed and vo-coded into a digital signal that is transmitted during one or more of the time slots. Received messages are recovered from at least one of these time slots and the voice message synthesized from the vo-coded signal. In this manner multiple voice messages may be transceived in a time division multiplexed manner on a single narrowband communication channel.
摘要翻译： 公开了一种时分复用（TDM）通信系统，其将射频通信信道分配到至少两个时隙。 用于在该系统上传输的语音信号被分析并且被vo编码成在一个或多个时隙期间发送的数字信号。 从这些时隙中的至少一个和从VoIP编码信号合成的语音消息中恢复接收到的消息。 以这种方式，可以在单个窄带通信信道上以时分复用方式收发多个语音消息。
-
-
-
-
-
-
-
-
-
搜索结果
18 条记录 (耗时 0.025 秒)
