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1. 发明授权

US5436956A Method and arrangement for reducing the number of handoff requests in a cellular mobile communications system 失效
标题翻译：用于减少蜂窝移动通信系统中切换请求数量的方法和装置
公开(公告)号：US5436956A
公开(公告)日：1995-07-25
申请号：US92893
申请日：1993-07-19
申请人： Hirofumi Shiotsuki , Eiki Katsuoka
发明人： Hirofumi Shiotsuki , Eiki Katsuoka
IPC分类号： H04B7/26 , H04W36/30 , H04Q7/22
CPC分类号： H04W36/30
摘要： In order to effectively control a time interval of issuing a handoff request from a land site in a mobile communications system, a strength of a signal which is transmitted from a mobile unit located in a service area of said land site, is measured at the land side. A level crossing rate is measured based on the signal transmitted from the mobile unit. A first handoff request is generated if the signal strength falls below a predetermined handoff threshold. Following this, a timer is rendered active for counting an elapsed time after the first handoff request is generated. If the signal strength is detected below the predetermined handoff threshold, a time interval is determined based on the level crossing rate. The relationship between the time interval and the level crossing rate has been previously determined. Thereafter, a second handoff request is generated if the time interval determined in the above exceeds the elapsed time. subsequently, the timer is reset and then the above operations are repeated.
摘要翻译：为了有效地控制从移动通信系统中的陆地站点发出切换请求的时间间隔，在位于陆地的服务区域中的移动单元发送的信号的强度在陆地上测量侧。基于从移动单元发送的信号来测量电平穿越率。如果信号强度低于预定切换阈值，则产生第一越区切换请求。此后，定时器被激活以对生成第一切换请求之后的经过时间进行计数。如果检测到信号强度低于预定切换阈值，则基于等级穿越速率来确定时间间隔。事先确定了时间间隔与水平穿越率之间的关系。此后，如果在上述确定的时间间隔超过经过时间，则产生第二越区切换请求。随后定时器复位，然后重复上述操作。

2. 发明授权

US5095530A Radio telephone system switching control capability of control channels 失效
标题翻译：无线电话系统控制通道的切换控制能力
公开(公告)号：US5095530A
公开(公告)日：1992-03-10
申请号：US421902
申请日：1989-10-16
申请人： Shoji Tanaka , Hirofumi Shiotsuki , Eiki Katsuoka
发明人： Shoji Tanaka , Hirofumi Shiotsuki , Eiki Katsuoka
IPC分类号： H04W68/00 , H04W74/00
CPC分类号： H04W74/00 , H04W68/00
摘要： A radio telephone switching control system having control channels which transmit/receive control data betweeen a plurality of movable terminals and a radio base station. The control channels include a mono-functional channel for access which is dedicated to access during data transmission/receiving by calling from the terminals. The control channel also includes a bi-functional channel for paging and access usable as a channel for paging one of the terminals as well as for access. The system contains a base station with a fault detector. Only one kind of control channel information is broadcast in the same service zone. All of the movable stations existing in same service zone scan the first or second range to decide the channel for access or paging according to the received control channel information. The system also sets the mono-functional channel for access and the bi-functional channel for paging and access, when a fault is not detected. Once a fault is detected, the second range is separated from the first range, whereby the mono-functional channel for paging is used only to transmit data for paging from the base station and the mono-functional channel for access is used to transmit/receive data related to actions other than paging to the terminals.
摘要翻译：一种无线电话切换控制系统，具有控制信道，该控制信道在多个可移动终端与无线基站之间发送/接收控制数据。控制信道包括用于接入的单功能信道，其专用于通过从终端呼叫进行数据发送/接收期间的接入。控制信道还包括用于寻呼和接入的双功能信道，可用作寻呼一个终端以及用于接入的信道。该系统包含一个带故障检测器的基站。只有一种控制信道信息在同一个业务区域广播。存在于同一服务区域的所有可移动站根据接收到的控制信道信息扫描第一或第二范围以决定接入或寻呼信道。当未检测到故障时，系统还设置用于访问的单功能通道和用于寻呼和访问的双功能通道。一旦检测到故障，第二范围与第一范围分离，由此用于寻呼的单功能信道仅用于从基站发送用于寻呼的数据，并且用于接入的单功能信道用于发送/接收与除终端之外的动作相关的数据。

3. 发明授权

US5455963A Method of switching voice channels in a mobile communication system 失效
标题翻译：在移动通信系统中切换语音信道的方法
公开(公告)号：US5455963A
公开(公告)日：1995-10-03
申请号：US157297
申请日：1993-11-26
申请人： Hirofumi Shiotsuki , Yoshinori Hashimoto
发明人： Hirofumi Shiotsuki , Yoshinori Hashimoto
IPC分类号： H04W36/08 , H04W36/20 , H04W36/22 , H04W36/38 , H04M11/00
CPC分类号： H04W36/30 , H04W36/38
摘要： If the present voice channel activity ratio (.alpha.) of a first radio base station used as an original radio base station is smaller than a threshold (.DELTA.CH) and the present voice channel activity ratio (.beta.) of a second radio base station used as a destination radio base station is equal to or greater than the threshold (.DELTA.CH), a predetermined threshold (.DELTA.AB) for determining the difference between the levels (Ra) and (Rb) of electric fields received from a mobile terminal by the first and second radio base stations is corrected with a value (X) to produce a new threshold (.DELTA.AB+X). If the present voice channel activity ratio (.alpha.) of the first radio base station is equal to or greater than the threshold (.DELTA.CH) and the present voice channel activity ratio (.beta.) of the second radio base station is smaller than the threshold (.DELTA.CH), the threshold (.DELTA.AB) is corrected with a value (Y) to produce a new threshold (.DELTA.-Y). If the difference between the levels (Rb) and (Ra) is equal to or greater than the threshold for determining the difference between the levels (Rb) and (Ra), a call is rerouted from the first radio base station to the second radio base station.
摘要翻译：如果用作原始无线电基站的第一无线电基站的当前语音信道活动比（α）小于阈值（DELTA CH），并且第二无线电基站的当前语音信道活动比（β）用作目的地无线电基站等于或大于阈值（DELTA CH），用于确定由移动终端接收的电场的电平（Ra）和（Rb）之间的差异的预定阈值（DELTA AB）并且用值（X）校正第二无线电基站以产生新的阈值（DELTA AB + X）。如果第一无线电基站的当前语音信道活动比（α）等于或大于阈值（DELTA CH），并且第二无线电基站的当前语音信道活动比（β）小于阈值（ DELTA CH），阈值（DELTA AB）用值（Y）校正以产生新的阈值（DELTA-Y）。如果电平（Rb）和（Ra）之间的差异等于或大于用于确定电平（Rb）和（Ra）之间的差的阈值，则呼叫从第一无线电基站重新路由到第二无线电基站。

4. 发明授权

US07024201B2 Mobile communication system 失效
公开(公告)号：US07024201B2
公开(公告)日：2006-04-04
申请号：US10316838
申请日：2002-12-12
申请人： Hiroyuki Tomishima , Hirofumi Shiotsuki
发明人： Hiroyuki Tomishima , Hirofumi Shiotsuki
IPC分类号： H04Q7/20
CPC分类号： H04L1/20 , H04L1/18 , H04W24/00 , H04W76/30 , H04W88/12
摘要： By detecting a degraded state of wireless transmission quality due to steady occurrence of re-transmission in an early stage to lead to a call connection, a service quality is made sure, an excess time charge on an end user is prevented and wireless resources are utilized efficiently. A base station controller monitors a PDU transmission state in a wireless link to a mobile station in call unit, calculates an occurrence rate of re-transmission as an evaluation value of wireless transmission quality, determines a degradation of the wireless transmission quality when the occurrence rate of re-transmission becomes equal to or larger than a predetermined threshold value and performs a disconnection processing for the call.

5. 发明授权

US5450473A Method and arrangement of effectively reducing signal strength measurements for a handoff in a cellular mobile communications system 失效
标题翻译：有效降低蜂窝移动通信系统中的切换的信号强度测量的方法和装置
公开(公告)号：US5450473A
公开(公告)日：1995-09-12
申请号：US180299
申请日：1994-01-12
申请人： Hirofumi Shiotsuki , Kenji Yamaguchi
发明人： Hirofumi Shiotsuki , Kenji Yamaguchi
IPC分类号： H04W36/30 , H04Q7/22 , H04M11/00
CPC分类号： H04W36/30
摘要： In order to reduce the number of measurements of signal strength for implementing a handoff of a mobile unit located in a given land site, a strength of a signal transmitted from said mobile unit is measured at the land site. Further, the land site measures a level crossing rate based on the signal transmitted from the mobile to be handed off. The land site applies a handoff request to a MTSO if the land site detects that the measured signal strength falls below a predetermined handoff threshold. The handoff request includes information indicating the level crossing rate. The MTSO compares the level crossing rate with a predetermined value, and determine a plurality of land sites each of which is to measure the signal strength for implementing a handoff according to the comparison result.
摘要翻译：为了减少用于实现位于给定地面站点中的移动单元的切换的信号强度的测量次数，在陆地场地测量从所述移动单元发送的信号的强度。此外，陆地场地基于从移动台发送的信号来测量交叉率。如果陆地站点检测到测得的信号强度低于预定切换阈值，则陆地场地向MTSO应用切换请求。切换请求包括指示等级穿越率的信息。 MTSO将电平穿越率与预定值进行比较，并且根据比较结果确定多个地面站点，每个陆地站点都要测量用于实现切换的信号强度。

6. 发明授权

US06778830B1 Mobile telecommunication system and channel handoff system between the mobile telecommunication systems 失效
标题翻译：移动电信系统和移动电信系统之间的信道切换系统
公开(公告)号：US06778830B1
公开(公告)日：2004-08-17
申请号：US09695069
申请日：2000-10-25
申请人： Yasuhiro Oizumi , Hirofumi Shiotsuki
发明人： Yasuhiro Oizumi , Hirofumi Shiotsuki
IPC分类号： H04Q720
CPC分类号： H04W36/08 , H04W36/38
摘要： The telecommunication system has mobile telecommunication systems located with their coverage service areas overlapped with each other. Each of the mobile telecommunication systems provides a communication service to a mobile telephone terminal through a radio base station and a radio base station control unit. The radio base station control unit controls communication processing of the radio base station and the mobile telephone terminal. The radio base station control unit has a first means for providing a hard-handoff command signal to command the mobile telephone terminal to execute a hard handoff when the mobile telephone terminal is in the overlapped service area. The hard-handoff command signal is prescribed to become effective at a predetermined time after the mobile telephone terminal receives the hard-handoff command signal. The radio base station control unit has also a second means for providing a hard-handoff command cancellation signal to command the mobile telephone terminal to cancel the hard-handoff command signal when the hard-handoff command signal has not become effective yet. The mobile telephone terminal has means for executing cancellation of the hard-handoff command signal in response to the hard-handoff command cancellation signal.
摘要翻译：电信系统具有移动电信系统，其覆盖服务区域彼此重叠。每个移动电信系统通过无线电基站和无线电基站控制单元向移动电话终端提供通信服务。无线基站控制单元控制无线基站和移动电话终端的通信处理。无线基站控制单元具有第一装置，用于当移动电话终端处于重叠服务区域时，提供硬切换命令信号以命令移动电话终端执行硬切换。硬切换指令信号被规定为在移动电话终端接收硬切换命令信号之后的预定时间生效。无线基站控制单元还具有第二装置，用于当硬切换命令信号尚未生效时，提供硬切换指令消除信号以命令移动电话终端取消硬切换命令信号。移动电话终端具有响应于硬切换命令消除信号执行硬切换命令信号的取消的装置。

7. 发明授权

US06424833B1 Mobile communication system and a hand-off method thereof 失效
标题翻译：移动通信系统及其切换方法
公开(公告)号：US06424833B1
公开(公告)日：2002-07-23
申请号：US09338607
申请日：1999-06-23
申请人： Hiromi Iizuka , Hirofumi Shiotsuki , Makoto Aihara
发明人： Hiromi Iizuka , Hirofumi Shiotsuki , Makoto Aihara
IPC分类号： H04Q720
CPC分类号： H04W36/30 , H04W36/08
摘要： A mobile communication system, which is capable of improving a hand-off success rate of a mobile terminal moving in a high speed, and also capable of improving a process capability of a base station during hand-off control operation, is realized. When the mobile terminal, which has moved from one cell to another cell during communication, receives a hand-off instruction signal from a hand-off control unit of a mobile switching center, an electric field level measurement stopping unit stops the electric field level measurement of the forward control channels of the adjoining base stations which has instructed from the original hand-off base station, and also stops the transmission of the electric field level measurement result signal.
摘要翻译：实现能够提高移动终端高速移动的切换成功率，并且还能够在切换控制操作期间提高基站的处理能力的移动通信系统。当在通信期间从一个小区移动到另一小区的移动终端从移动交换中心的切换控制单元接收到切换指示信号时，电场电平测量停止单元停止电场电平测量从原始切换基站指示的相邻基站的前向控制信道，并停止发送电场电平测量结果信号。

8. 发明授权

US06393287B1 System for switching speech channel between loosely couple radio base stations 失效
标题翻译：用于在松耦合无线电基站之间切换语音信道的系统
公开(公告)号：US06393287B1
公开(公告)日：2002-05-21
申请号：US09576428
申请日：2000-05-22
申请人： Hiroyuki Munekata , Hirofumi Shiotsuki
发明人： Hiroyuki Munekata , Hirofumi Shiotsuki
IPC分类号： H04Q720
CPC分类号： H04W36/30
摘要： Disclosed is a speech channel switching system which has: a radio base station control unit that allows a mobile telephone terminal to have a communication channel through a plurality of radio base station devices; and a radio base station which is provided with a field strength measurement-only channel which allows the mobile telephone terminal to measure the field strength of radiowave received. In the system, the mobile telephone terminal measures the field strength in field strength measurement-only channel designated and informing the radio base station control unit of the measurement results through the radio base station. The radio base station control unit is provided with a hand off table for recording a soft hand off candidate station for each radio base station, and an additional station search table for recording an additional radio base station that the candidate station is expected to next perform soft hand off, and, regardless of the field strength, allows the mobile telephone terminal to have a speech channel to the additional station.
摘要翻译：公开了一种语音信道切换系统，其具有：无线基站控制单元，其允许移动电话终端通过多个无线基站装置具有通信信道; 以及设置有场强测量信道的无线基站，其允许移动电话终端测量接收到的无线电波的场强。在该系统中，移动电话终端通过指定的场强测量信道测量场强，并通过无线基站通知无线基站控制单元的测量结果。无线基站控制单元设置有用于记录用于每个无线电基站的软切换候选站的切换表，以及用于记录候选站下一步执行软件的附加无线电基站的附加站搜索表切断，并且无论场强如何，允许移动电话终端具有到附加站的语音信道。

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