公开(公告)号：US08605630B2

公开(公告)日：2013-12-10

申请号：US13230555

申请日：2011-09-12

申请人： Chong Uk Lee ,  Alejandro Raul Holcman ,  Jeremy M. Stein ,  Ramin Rezaiifar ,  Babak Aryan

发明人： Chong Uk Lee ,  Alejandro Raul Holcman ,  Jeremy M. Stein ,  Ramin Rezaiifar ,  Babak Aryan

IPC分类号： H04W52/02 ,  H04W4/00

CPC分类号： H04W56/0015 ,  H04B7/24 ,  H04J3/06 ,  H04W52/028 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/448

摘要： Operating at least one low duty cycle (LDC) controller to maintain synchronization between the LDC controller and a plurality of LDC terminals operating over a communication network using only overhead channels of the network and conforming to the protocol and timing of said network, wherein synchronization between the LDC controller and the plurality of LDC terminals is maintained separately from the protocol and timing of the communication network, and enables the LDC controller to schedule power down and wake up of the plurality of LDC terminals for durations longer than allowable under the protocol and timing of the communication network.

摘要翻译： 操作至少一个低占空比（LDC）控制器，以维持LDC控制器与通过网络运行的多个LDC终端之间的同步，仅使用网络的开销信道并符合所述网络的协议和定时，其中， LDC控制器和多个LDC终端与通信网络的协议和定时分开地保持，并且使LDC控制器能够调度多个LDC终端的停电和唤醒持续时间长于协议和定时下允许的持续时间 的通信网络。

公开(公告)号：US5870427A

公开(公告)日：1999-02-09

申请号：US481119

申请日：1995-06-01

申请人： Edward G. Tiedemann, Jr. ,  Alejandro Raul Holcman

发明人： Edward G. Tiedemann, Jr. ,  Alejandro Raul Holcman

IPC分类号： H04B1/7075 ,  H04J3/06 ,  H04L25/00

CPC分类号： H04B1/7075 ,  H04B1/70758 ,  H04W36/06

摘要： A method for handoff of an analog connection within a cellular communication system which relies upon mobile station synchronization to a system time is disclosed herein. In order to reduce the acquisition time for a mobile station commencing operation in a digital mode, an estimate of master system time is transferred to the mobile station in analog mode before entering digital mode. The alignment operates within the protocols of existing analog systems, and hence requires only minimal changes in the mobile station. Time alignment may be initiated upon the base station sending to the mobile station a command to continually transmit a periodic signaling tone. The base station compares the phase of the signaling tone from the mobile station to a master system clock and determines an error signal. The base station notifies the mobile station to delay or advance in time the transmitted signaling tones based on the error signal. This procedure may continue until the calculated error falls below a predetermined level. Having attained time alignment, the base station is able to transfer to the mobile station absolute time of day information with increased accuracy. The mobile station is then commanded into digital mode where transition time is reduced to a level tolerable by the end user due to the performed alignment.

摘要翻译： 本文公开了一种在移动台同步到系统时间的蜂窝通信系统内的模拟连接的切换方法。 为了减少移动台以数字模式开始运行的采集时间，在进入数字模式之前，将主系统时间的估计在模拟模式下传送到移动台。 该对准在现有模拟系统的协议内进行操作，因此在移动站中仅需要最小的改变。 可以在基站向移动台发送连续发送周期性信令音的命令时启动时间对准。 基站将来自移动台的信号音的相位与主系统时钟进行比较，并确定误差信号。 基站基于误差信号通知移动台在时间上延迟或提前发送的信令音。 该过程可以继续，直到计算出的误差低于预定水平。 达到时间对准后，基站能够以更高的准确度向移动台传输绝对时间信息。 然后移动台被命令进入数字模式，其中由于所执行的对准，转换时间减少到最终用户容许的电平。

公开(公告)号：US5697055A

公开(公告)日：1997-12-09

申请号：US322817

申请日：1994-10-16

申请人： Klein S. Gilhousen ,  Gadi Karmi ,  Edward G. Tiedemann, Jr. ,  Alejandro Raul Holcman

发明人： Klein S. Gilhousen ,  Gadi Karmi ,  Edward G. Tiedemann, Jr. ,  Alejandro Raul Holcman

IPC分类号： H04W36/14 ,  H04W36/18 ,  H04Q7/22

CPC分类号： H04W36/0055 ,  H04W36/0083 ,  H04W36/30

摘要： A method and system for performing an intersystem handoff of communication with a mobile station between base stations of first and second cellular systems is disclosed herein. At the mobile station, a quantifiable parameter of a signal transmitted by a second base station of the second system is measured. When the measured value of the quantifiable parameter passes through a first predetermined level, the mobile station communicates a signal quality message via a first base station of the first system to a first mobile switching control station. A channel request message is then communicated from the first mobile switching control station to a second mobile switching control station within the second system. At the second base station, a quantifiable parameter of the signal received from the mobile station is also measured. The second base station establishes communication with the mobile station when the measured value of the quantifiable parameter passes through a predetermined level. Alternately, the signal strength of a first pilot signal transmitted by the first base station is measured at the mobile station. A handoff request message is then sent to the second base station when the measured signal strength of the first pilot signal becomes less than a second predetermined level, thereby mobile station communication to be established. The provision of a voice link between the mobile switching control stations allows for the forwarding of an existing connection between the first and second cellular systems, and enables the performance of soft intersystem handoffs.

摘要翻译： 本文公开了一种用于在第一和第二蜂窝系统的基站之间执行与移动站的通信的系统间切换的方法和系统。 在移动站，测量由第二系统的第二基站发送的信号的可量化参数。 当可量化参数的测量值通过第一预定电平时，移动台通过第一系统的第一基站向第一移动交换控制站传送信号质量消息。 然后，信道请求消息从第一移动交换控制站传送到第二系统内的第二移动交换控制站。 在第二基站，也测量从移动台接收的信号的可量化参数。 当可量化参数的测量值通过预定水平时，第二基站与移动站建立通信。 或者，在移动台处测量由第一基站发送的第一导频信号的信号强度。 当第一导频信号的测量信号强度变得小于第二预定电平时，切换请求消息被发送到第二基站，从而建立移动台通信。 在移动交换控制站之间提供语音链路允许转发第一和第二蜂窝系统之间的现有连接，并且能够执行软系统间切换。