公开(公告)号：US5987099A

公开(公告)日：1999-11-16

申请号：US320849

申请日：1994-10-07

申请人： Keith Daniel O'Neill ,  Alan Morris Redmond ,  Jin Kue Wong ,  Shoji Matsushita ,  David Charles Ploeg ,  Christian Jacques Szpilfogel ,  Peter David Gale ,  Garry Don Mah ,  William Owen Bird

发明人： Keith Daniel O'Neill ,  Alan Morris Redmond ,  Jin Kue Wong ,  Shoji Matsushita ,  David Charles Ploeg ,  Christian Jacques Szpilfogel ,  Peter David Gale ,  Garry Don Mah ,  William Owen Bird

IPC分类号： H04W36/08 ,  H04W36/30 ,  H04W48/20 ,  H04W68/00 ,  H04M11/00

CPC分类号： H04W68/00 ,  H04W36/30 ,  H04W48/20 ,  H04W36/08

摘要： A wireless telephone system provides telecommunications services for personal wireless telephone sets over an area which is divided into service cells. Each of the cells is defined by reception characteristics of a plurality of radio base stations within the cell. The telephone system includes a service controller and a port being wireline connected between each radio base station and the service controller. The service controller selects radio base stations for setting up radio links with wireless sets of calling or called persons. A base station which serves a wireless set and surrounding idle base stations monitor strengths of radio signals received from the wireless set and report running averages of the monitored signal strengths to the service controller. Movement of the wireless set from one cell to another cell during a call is detected as a drop in the running average reported by the serving base station. The service controller selects an idle base station to which the call is handed off based on the running averages reported by the idle base stations only idle base stations having a running average greater than the serving base station report their running average.

摘要翻译： 无线电话系统在被划分成服务小区的区域上为个人无线电话机提供电信服务。 每个小区由小区内的多个无线基站的接收特性来定义。 电话系统包括服务控制器和连接在每个无线电基站与服务控制器之间的有线线路。 服务控制器选择无线电基站来建立与无线呼叫或被叫人的无线电链路。 为无线设备和周围的空闲基站服务的基站监视从无线设备接收的无线电信号的强度，并将监视的信号强度的运行平均值报告给业务控制器。 在呼叫期间将无线设备从一个小区移动到另一小区被检测为服务基站报告的运行平均值的下降。 业务控制器基于空闲基站所报告的运行平均值，选择一个空闲的基站，该基站的移动平均值大于服务基站的空闲基站报告其运行平均值。

公开(公告)号：US4970410A

公开(公告)日：1990-11-13

申请号：US333922

申请日：1989-04-06

申请人： Shoji Matsushita ,  Masaharu Kimura

发明人： Shoji Matsushita ,  Masaharu Kimura

IPC分类号： G01R31/26 ,  G01R31/28 ,  G01R31/3185

CPC分类号： G01R31/318522

摘要： A semiconductor integrated circuit device includes an external terminal, an internal logic circuit, and an input/output interface circuit. The input/output interface circuit includes an input circuit, a selection circuit and an output circuit. The input circuit receives an input signal and supplies the internal logic circuit with the same. The selection circuit selects either the input signal supplied from the input circuit or an output signal supplied from the internal logic circuit. The output circuit outputs the selected one of the input signal and output signal to the external terminal. A loop circuit is formed by the input circuit, selection circuit and output circuit. The loop circuit logically includes an odd number of inverters.