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    VOX REMOTE UNIT CONTROL IN A CELLULAR SYSTEM.
    34.
    发明公开
    VOX REMOTE UNIT CONTROL IN A CELLULAR SYSTEM. 失效
    控制对远程VOX单位在蜂窝系统。

    公开(公告)号：EP0299040A4

    公开(公告)日：1990-06-26

    申请号：EP88901346

    申请日：1988-01-11

    Applicant: MOTOROLA INC

    Inventor： BONTA JEFFREY D ,  SCHAEFFER DENNIS R ,  MENICH BARRY J ,  HOFSTRA EDWARD J

    IPC: H04W36/08 ,  H04W36/30 ,  H04W74/06 ,  H04Q7/00 ,  H04Q7/04

    CPC classification number: H04W24/10 ,  H04W36/0094 ,  H04W36/30

    Abstract: A cellular radiotelephone system provides service to remote units having a voice operated transmitter (VOX) (230). If the regularly scheduled periodic signal quality measurements made by fixed site equipment (210, 220, 230, 240, 250) indicate that the remote unit signal has not been received for a predetermined number of measurements, an audit request is transmitted to the remote unit. The remote unit responsively keys its transmitter for a period of time. A first special scan (24) is programmed into the regular process such that the fixed site equipment (210, 220, 230, 240, 250) may continue with its regular process until the signal quality measurement must be made. A second measurement is made following the first and if the two signal quality measurements made while the VOX remote unit is known to be transmitting agree, system reconfiguration for the service of this remote unit may be implemented by the cellular system.

    APPARATUS AND METHOD FOR MITIGATING EXCESS TIME DELAY IN A WIRELESS COMMUNICATION SYSTEM
    35.
    发明公开
    APPARATUS AND METHOD FOR MITIGATING EXCESS TIME DELAY IN A WIRELESS COMMUNICATION SYSTEM 失效
    设备和方法减少废物延误无绳通信系统

    公开(公告)号：EP0824843A4

    公开(公告)日：2000-08-09

    申请号：EP96943761

    申请日：1996-12-13

    Applicant: MOTOROLA INC

    Inventor： KOTZIN MICHAEL D ,  SCHAEFFER DENNIS R ,  CSAPO JOHN S ,  THOMPSON DENNIS J ,  SPEAR STEPHEN L

    IPC: H04B7/26 ,  H04W36/04 ,  H04Q7/38

    CPC classification number: H04W36/04

    Abstract: A wireless communication system (200, 300, 400, 500) mitigates the effects of excess timing delay caused by varying lengths of communication paths. In one general implementation, a transition communication path (206, 323, 329) is used to transfer a time-advanced version of a timing reference signal so that the cumulative time delay at a transition cell (209, 325, 331) is reduced. In another general implementation, the timing reference signal is time-advanced in all communication paths (403-411), and selected communication paths (403-407) include a time delay means (423-427, 503-507) such that the cumulative time delay at an area (421) near a target coverage area (130) is reduced. By reducing the cumulative time delay at the area (421) near the target coverage area (130), a hand-off of a communication of a mobile station (128) into the target coverage area (130) can be performed.

    CELLULAR VOICE AND DATA RADIOTELEPHONE SYSTEM.
    36.
    发明公开
    CELLULAR VOICE AND DATA RADIOTELEPHONE SYSTEM. 失效
    CELLULARES STIMME- UNDDATENFUNKFERNÜBERTRAGUNGSSYSTEM。

    公开(公告)号：EP0188554A4

    公开(公告)日：1986-11-07

    申请号：EP85903622

    申请日：1985-07-09

    Applicant: MOTOROLA INC

    Inventor： LABEDZ GERALD P ,  BONTA JEFFERY D ,  SCHAEFFER DENNIS R ,  TELL DANIEL F ,  LEV VALY

    IPC: H04B7/26 ,  H04B7/00 ,  H04W28/06 ,  H04W36/02 ,  H04W36/08 ,  H04Q7/04

    CPC classification number: H04W36/0055 ,  H04W28/06

    Abstract: A data message transmission system for a cellular radiotelephone system provides protection against data loss caused by multipath fade and subscriber unit handoff. Data from data terminal equipment (801) to be transmitted is converted by a system data processor (805) and radio signalling interface (807) into a format compatible with radio transmission prior to transmission by a transceiver (809). The data is reconverted to its original format following reception. Handoff is accomplished by halting the data transmission prior to handoff and resuming data transmission after handoff. Call supervision occurs via busy-idle bit coding performed in radio signalling interface (807).

    Abstract translation: 用于蜂窝无线电话系统的数据消息传输系统可防止由多径衰落和用户单元越区切换造成的数据丢失。 来自要发送的数据终端设备（801）的数据在系统数据处理器（805）和无线电信令接口（807）被转换为与收发器（809）发送之前的无线电传输兼容的格式。 接收后数据将重新转换为原始格式。 切换是通过在切换之前停止数据传输并在切换之后恢复数据传输来完成的。 呼叫监视通过在无线电信令接口（807）中执行的忙闲位编码进行。

    38.
    发明专利
    未知

    公开(公告)号：DE68922512T2

    公开(公告)日：1996-01-11

    申请号：DE68922512

    申请日：1989-02-03

    Applicant: MOTOROLA INC

    Inventor： SCHAEFFER DENNIS R

    IPC: H04B7/26 ,  H04W24/00 ,  H04W72/06 ,  H04W84/04 ,  H04W88/08 ,  H04Q7/20

    Abstract: An improved TDMA radiotelephone cellular communication system (122, 115, 199) employs an improved cell site scan monitoring technique. The technique includes monitoring radiotelephone calls, and tracking and recording their signal qualities. The records are used to maintain and determine which frequencies and which time partitions at the base site equipment (115, 119) are being utilized for radiotelephone communication. When a new call assignment is required at a cell site (115 or 119), it is assigned to a time partition of a base site equipment frequency in a frequency prioritized manner such that radiotelephone calls are concentrated within each frequency so as to reduce the number of frequencies carrying radiotelephone calls.

    SIGNAL ROUTING SYSTEM
    40.
    发明专利
    SIGNAL ROUTING SYSTEM 未知

    公开(公告)号：CA2045466C

    公开(公告)日：1994-02-01

    申请号：CA2045466

    申请日：1990-04-04

    Applicant: MOTOROLA INC

    Inventor： SCHAEFFER DENNIS R

    IPC: H01Q1/24 ,  H01Q3/24 ,  H01Q21/06 ,  H01Q21/20 ,  H04B7/00 ,  H04W88/08 ,  H04Q7/00

    Abstract: 2045466 9014720 PCTABS00002 A signal routing system for use in cellular RF communications systems wherein a signal can be routed to different antennas, effectively switching transmitters between antennas. The switching is accomplished by placing a frequency responsive device (7) between a transmitter and each antenna. The transmitter is then coupled to an antenna through the frequency responsive device (7) that has a resonant frequency equal to the transmitter's frequency. If the transmitter changes frequency, it will be switched to the appropriate antenna through the corresponding frequency responsive device (7). This system permits a sector of a cell to increase the number of frequencies in that sector to handle increased mobile traffic loads.

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