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    • 2. 发明授权
    • Method and apparatus of power control in a CDMA dispatch system
    • CDMA调度系统中功率控制的方法和装置
    • US5881368A
    • 1999-03-09
    • US660618
    • 1996-06-06
    • Matthew S. GrobYu-Dong YaoEric J. Lekven
    • Matthew S. GrobYu-Dong YaoEric J. Lekven
    • H04B7/005H04B7/26H04W52/00H04W52/32H04W68/00H04W68/02H04B1/00
    • H04W52/322H04W68/00H04W68/02Y02B60/50
    • In a dispatch system, power of the forward link broadcast channel transmitted from a base station is controlled such that the power level is the minimum necessary and such that transmission of the forward link broadcast channel is terminated if no remote unit is located within the coverage area of the base station. In addition to transmitting a forward link broadcast signal, the base station monitors an access channel. A first remote unit in the base station coverage area receives and decodes the forward link broadcast signal. The first remote unit determines a signal quality of said forward link broadcast signal. If the signal quality is unacceptable, the remote unit transmits a power request access message. The base station responds to the request by increasing the transmission power of forward link broadcast channel. If no requests are received at the base station, the forward link broadcast channel is slowly decreased to a minimum. Transmission of the forward link broadcast channel may be terminated completely.
    • 在调度系统中,控制从基站发送的前向链路广播信道的功率,使得功率电平是必需的最小值,并且如果没有远程单元位于覆盖区域内,则前向链路广播信道的传输被终止 的基站。 除了发送前向链路广播信号之外,基站监视接入信道。 基站覆盖区域中的第一远程单元接收并解码前向链路广播信号。 第一远程单元确定所述前向链路广播信号的信号质量。 如果信号质量不可接受,则远程单元发送功率请求访问消息。 基站通过增加前向链路广播信道的发送功率来响应该请求。 如果在基站没有接收到请求,则将前向链路广播信道缓慢降低到最小。 前向链路广播信道的传输可以完全终止。
    • 4. 发明授权
    • Method and apparatus for monitoring link activity to prevent system
deadlock in a dispatch system
    • 监控链路活动以防止调度系统中的系统死锁的方法和装置
    • US5983114A
    • 1999-11-09
    • US669778
    • 1996-06-26
    • Yu-Dong YaoMatthew S. Grob
    • Yu-Dong YaoMatthew S. Grob
    • H04B7/26H04W4/10H04W84/08
    • H04W4/10H04W76/005
    • Method and apparatus to prevent system deadlock in a dispatch system by monitoring link activity. The dispatch system is comprised of a set of remote units which communicate with each other by broadcasting one at a time to the group. A remote unit communicates with the other remote units through at least one base station. A communications manager grants a remote unit exclusive system talker status upon request through the base station servicing the requesting remote unit. The base station monitors a series of data from the remote unit designated as the system talker to detect voice activity. The base station sends a surrogate request to the communications manager to relinquish the system talker privilege if the voice activity falls below a predetermined threshold.
    • 通过监测链路活动来防止调度系统中系统死锁的方法和装置。 调度系统由一组远程单元组成,它们通过一次一个地向组进行通信来进行通信。 远程单元通过至少一个基站与其他远程单元进行通信。 一个通信管理器通过服务请求的远程单元的基站请求,授予远程单元专用系统讲话者状态。 基站监视来自指定为系统讲话者的远程单元的一系列数据,以检测语音活动。 如果语音活动低于预定阈值,则基站向通信管理器发送代理请求以放弃系统讲话者特权。
    • 10. 发明授权
    • Method and apparatus for access regulation and system protection of a
dispatch system
    • 调度系统的访问调节和系统保护的方法和装置
    • US5960362A
    • 1999-09-28
    • US671132
    • 1996-06-24
    • Matthew S. GrobYu-Dong YaoEric J. Lekven
    • Matthew S. GrobYu-Dong YaoEric J. Lekven
    • H04W4/10H04W84/08H04B1/00
    • H04W4/10H04W76/005
    • A method and apparatus to provide access to a dispatch system is disclosed. A communications manager (40) grants an exclusive system talker privilege to one remote unit (10) in the system at a time. After a remote unit (10) requests and is designated as the exclusive system talker, no other remote unit (20, 22) may transmit for a first pre-determined amount of time. After the first pre-determined time has elapsed, any other remote unit (20, 22) may request the exclusive system talker privilege and become the exclusive system talker. The exclusive system talker privilege is revoked by the communications manager (40) to any remote unit who retains the exclusive system talker privilege for more than a second pre-determined amount of time. The exclusive system talker privilege is also revoked upon the release of a push-to-talk button on a remote unit (10). Furthermore, a base station (44) in communication with a remote unit (10) designated as the exclusive system talker will generate a surrogate relinquishment request to the communications manager (40) if the exclusive system talker travels outside the coverage area of the system, loses power, or is destroyed.
    • 公开了一种提供对调度系统的访问的方法和装置。 通信管理器(40)一次向系统中的一个远程单元(10)授予专用系统讲话者特权。 在远程单元(10)请求并被指定为专用系统讲话者之后,没有其他远程单元(20,22)可以发送第一预定时间量。 在第一预定时间过去之后,任何其他远程单元(20,22)可以请求专用系统讲话者特权并成为专用系统讲话者。 通信管理器(40)将独占系统讲话者权限撤销到任何保留专用系统讲话者特权超过第二预定时间量的远程单元。 在远程单元(10)上释放按键通话按钮时,专用系统讲话者权限也被撤销。 此外,如果专用系统讲话者在系统的覆盖区域外行进,则与指定为专用系统讲话者的远程单元(10)通信的基站(44)将向通信管理器(40)生成替代放弃请求, 失去力量,或被毁灭。