公开(公告)号：US06532221B1

公开(公告)日：2003-03-11

申请号：US09290952

申请日：1999-04-13

Applicant: Hong Kim ,  Chae-Hun Chung

Inventor： Hong Kim ,  Chae-Hun Chung

IPC: H04Q720

CPC classification number: H04W36/30 ,  H04W36/08 ,  H04W36/18 ,  H04W48/16

Abstract: A handoff method of a mobile communications system, in case that a cell is defined by a sector, wherein a handoff request is made to a base station having a predetermined level of pilot signal strength by using a pilot signal strength of a base station which is in service, a predetermined threshold value and pilot signal strength of neighboring base stations, so that a handoff is to be performed or not is decided after detecting pilot signal strengths of a mobile station and a base station which has been already connected, controlling the handoff generation number while preventing unnecessary load.

Abstract translation: 在小区由扇区定义的情况下，移动通信系统的切换方法，其中通过使用基站的导频信号强度对具有预定电平的导频信号强度的基站进行切换请求，所述基站是 在服务中，预定的阈值和相邻基站的导频信号强度，使得在检测到已经连接的移动台和基站的导频信号强度之后确定切换是否被执行，控制切换 同时防止不必要的负载。

公开(公告)号：US06421330B1

公开(公告)日：2002-07-16

申请号：US09301474

申请日：1999-04-28

Applicant: Chae Hun Chung ,  Yang Soo Shin

Inventor： Chae Hun Chung ,  Yang Soo Shin

IPC: H04B138

CPC classification number: H04J13/00

Abstract: An apparatus and method for expanding a service area of a code division multiple access (CDMA) system restricted in terms of timing. The service area of a CDMA mobile communication system, which is defined by a radius longer than a radius of a communication supported area, namely, a cell, restricted in terms of timing due to the hardware of a base station modem ASIC equipped in the system, is radially divided into a plurality of radial zones by a constant distance not longer than a maximum possible cell radius allowed by the base station modem ASIC. In accordance with the present invention, signal processing units are used which are configured in such a fashion that one of them covers the entire zone of the service area in regard to forward links from an associated base station to mobile stations in different zones of the service area while covering only the zone nearest to the base station in regard to reverse links from the mobile stations to the base station. The remaining signal processing units cover reverse links associated with the remaining zones of the service area, respectively. By such a configuration, it is possible to extend the radius of the cell limited in terms of timing.

Abstract translation: 一种用于扩展在定时方面受到限制的码分多址（CDMA）系统的服务区域的装置和方法。 CDMA移动通信系统的服务区域，其由比通信支持区域的半径长的半径定义，即，由于系统中配备的基站调制解调器ASIC的硬件而限制的小区 径向分割成多个径向区，距离不超过基站调制解调器ASIC允许的最大可能小区半径。 根据本发明，使用信号处理单元，其被配置成使得它们之一覆盖服务区域的整个区域，涉及从相关联的基站到服务的不同区域中的移动站的前向链路 相对于从移动站到基站的反向链路，仅覆盖最靠近基站的区域。 剩余的信号处理单元分别覆盖与服务区域的其余区域相关联的反向链路。 通过这样的结构，可以延长电池的半径在定时方面受到限制。

公开(公告)号：US06885647B1

公开(公告)日：2005-04-26

申请号：US09470852

申请日：1999-12-23

Applicant: Chae-Hun Chung ,  Yang-Soo Shin

Inventor： Chae-Hun Chung ,  Yang-Soo Shin

IPC: H04B7/26 ,  H04B1/707 ,  H04J13/00

CPC classification number: H04B1/707

Abstract: A base station for compensating a fixed route delay between a base station and a mobile station of a CDMA mobile communication system and an operation method thereof are disclosed. This base station includes a clock signal generation unit for receiving a 10 MHz, TOD and 1 PPS signal from a GPS receiving unit and generating a 1st even second clock signal in synchronization with the 1 PPS and a 2nd even second clock signal which is obtained by delaying the 1st even second clock signal by a maximum bidirectional propagation delay time between a base station and a relay unit, a first signal processing unit for receiving the 1st even second clock signal from the clock signal generation unit and modulating a forward link channel from the base station to a mobile station in synchronization with the 1st even second clock signal, and a second signal processing unit for receiving the 2nd even second clock signal from the clock signal generation unit and demodulating a backward link channel from the mobile station to the base station in synchronization with the 2nd even second clock signal, for thereby compensating a decrease of a cell communication radius due to a fixed route delay factor on a communication route between a base station and a mobile station.

Abstract translation: 公开了一种用于补偿CDMA移动通信系统的基站与移动站之间的固定路由延迟的基站及其操作方法。 该基站包括：时钟信号生成单元，用于从GPS接收单元接收10MHz，TOD和1 PPS信号，并与第一偶数和第二偶数第二时钟信号同步地产生第一偶数第二时钟信号，第二偶数第二时钟信号由 将第一偶数第二时钟信号延迟基站和中继单元之间的最大双向传播延迟时间;第一信号处理单元，用于从时钟信号产生单元接收第一偶数第二时钟信号，并调制来自 基站与第一偶数第二时钟信号同步到移动站;以及第二信号处理单元，用于从时钟信号生成单元接收第二偶数第二时钟信号，并将来自移动台的反向链路信道解调到基站 与第二偶数第二时钟信号同步，从而补偿由固定的ro引起的小区通信半径的减小 在基站和移动台之间的通信路由上的ute延迟因子。

公开(公告)号：US06226502B1

公开(公告)日：2001-05-01

申请号：US09220231

申请日：1998-12-23

Applicant: Chae-Hun Chung

Inventor： Chae-Hun Chung

IPC: H04Q732

CPC classification number: H04W52/143 ,  H04W52/50 ,  H04W52/52

Abstract: A base station transmitted forward power is controlled in such a manner that identifies a mode of an input base station transmitted forward power control command; and controls an attenuation value of an attenuator in a power adjustment part according to a result of the identification so as to gradually increase or decrease a base station transmitted power, thereby effecting the base station transmitted forward power control without deterioration of speech quality and interruption of calls.

Abstract translation: 基站发送的正向功率被控制为识别输入基站发送的正向功率控制命令的模式的方式; 并且根据识别结果控制功率调整部分中的衰减器的衰减值，以便逐渐增加或减少基站发射功率，从而实现基站发送的正向功率控制而不会降低语音质量和中断 电话。

公开(公告)号：US06539005B1

公开(公告)日：2003-03-25

申请号：US09352532

申请日：1999-07-13

Applicant: Dong-Hun Kim ,  Chae-Hun Chung

Inventor： Dong-Hun Kim ,  Chae-Hun Chung

IPC: H04J1302

CPC classification number: H04B1/7117

Abstract: A method for searching an access channel and allocating a finger for a base station is disclosed. The method includes a first step for searching an access channel signal, selecting a highest search critical value among the offsets having a search energy above a search critical value, allocating a finger in accordance with a path via which the selected offset signal is received and demodulating the signal, and a second step for checking whether an access channel probe period which corresponds to the time required until an access channel message unit is received and decoded is elapsed, stopping a search of a new multiple signal component to minimize any interference of the deciding operation of an access channel signal of another mobile station when one access channel probe period is not elapsed and feeding back to the first step when the access channel probe period is elapsed, for thereby preventing an interference for an access channel signal between the mobile stations by stopping a signal search operation of a search unit after a search unit of a base station allocates an offset to a finger with respect to an access channel signal of a certain mobile station and preventing a multiple path signal, which may be an access channel signal from a new mobile station during an access channel probe period which corresponds to a duration needed for obtaining one access channel signal by a base station, from being reallocated to a finger.

Abstract translation: 公开了一种用于搜索接入信道并为基站分配手指的方法。 该方法包括用于搜索接入信道信号的第一步骤，在具有搜索临界值以上的搜索能量的偏移中选择最高搜索临界值，根据接收所选择的偏移信号的路径分配手指并进行解调 该信号，以及第二步骤，用于检查与接收和解码的接入信道消息单元所需的时间相对应的接入信道探测周期是否过去，停止搜索新的多信号分量以最小化决定的干扰 当没有经过一个接入信道探测周期并且当经过接入信道探测周期时反馈到第一步，另一个移动台的接入信道信号的操作，从而防止移动台之间的接入信道信号的干扰 在基站的搜索单元分配偏移量之后停止搜索单元的信号搜索操作 相对于某个移动台的接入信道信号到手指，并且防止多路径信号，其可以是在访问信道探测周期期间来自新移动站的接入信道信号，其对应于获得一个接入所需的持续时间 通道信号由基站重新分配到手指。

公开(公告)号：US06226282B1

公开(公告)日：2001-05-01

申请号：US09220229

申请日：1998-12-23

Applicant: Chae-Hun Chung

Inventor： Chae-Hun Chung

IPC: H04B7216

CPC classification number: H04B1/70754 ,  H04W74/0833

Abstract: A method of searching reverse traffic channels in a code division multiple access (CDMA) mobile radio communication system for allowing for acquisition of reverse traffic channels without increase or decrease of size of a search window for traffic channels, the method comprising the steps of: storing an offset by a propagation delay after acquiring a reverse access channel; determining whether or not a pseudonoise (PN) random delay is employed for the reverse access channel and, when the PN random delay is used, calculating the PN random delay using a hash function with a factor of an electronic serial number (ESN) transmitted from a mobile station; computing the stored offset and the PN random delay and setting a new offset to a result of the computing; setting a center of a search window for searching the reverse traffic channel to the new offset and establishing the search window; and searching a reverse traffic channel preamble with the established search window.

Abstract translation: 一种在码分多址（CDMA）移动无线电通信系统中搜索反向业务信道的方法，用于允许获取反向业务信道而不增加或减少用于业务信道的搜索窗口的大小，所述方法包括以下步骤： 在获取反向接入信道之后由传播延迟的偏移; 确定对于反向接入信道是否采用伪噪声（PN）随机延迟，并且当使用PN随机延迟时，使用具有从其发送的电子序列号（ESN）因子的散列函数来计算PN随机延迟 移动台 计算所存储的偏移和PN随机延迟，并将新的偏移设置为计算的结果; 设置用于搜索反向业务信道到新偏移量并建立搜索窗口的搜索窗口的中心; 以及用建立的搜索窗口搜索反向业务信道前导码。

公开(公告)号：US06970498B1

公开(公告)日：2005-11-29

申请号：US09669280

申请日：2000-09-26

Applicant: Chae Hun Chung

Inventor： Chae Hun Chung

IPC: H04L27/00 ,  H04B1/28 ,  H04B7/155 ,  H04J1/04 ,  H04J13/00 ,  H04B1/69

CPC classification number: H04B1/28 ,  H04B1/001 ,  H04B1/707

Abstract: The RF receiver for the CDMA mobile communication BTS system according to the present invention realizes the system with an analog down-converter to process multiple FA's and generate IF signals of 70 MHz having a bandwidth corresponding to the multiple FA's with a mixer, and a digital down-converter to digitally process the respective FA's through A/D conversion of the IF signals of 70 MHz, allowing simple multi-FA(3FA)-based expansion. Also, the system needs only one analog down-converter for simultaneously processing 3 FA's and one digital down-converter for digitally processing the IF signals from the analog down-converter by FA's to down-convert the IF signals to baseband signals, thereby reducing the size of the system and hence the hardware cost. The system can be implemented with higher stability by digitally processing the down-conversion of the analog IF signals of multiple FA's to the baseband signals.

Abstract translation: 根据本发明的用于CDMA移动通信BTS系统的RF接收机实现具有模拟下变换器的系统来处理多个FA并且利用混频器产生具有对应于多个FA的带宽的70MHz的IF信号，并且数字 下转换器通过对70 MHz的IF信号进行A / D转换来对相应的FA进行数字处理，从而允许简单的多FA（3FA）扩展。 此外，该系统只需要一个模拟下变频器，用于同时处理3个FA和一个数字下变频器，用于通过FA对来自模拟下变频器的IF信号进行数字处理，以将IF信号下变频为基带信号，从而减少 系统的大小以及硬件成本。 通过将多个FA的模拟IF信号的下变频数字处理到基带信号，可以实现更高的稳定性。

公开(公告)号：US06415152B1

公开(公告)日：2002-07-02

申请号：US09478626

申请日：2000-01-05

Applicant: Chae Hun Chung

Inventor： Chae Hun Chung

IPC: H04Q720

CPC classification number: H04W36/06

Abstract: A method for operating a base station to solve a speech disable state based on the inter-speech sphere movement of a mobile station in enlarging a speech radius limited in timing in a CDMA mobile communication system. In a base station where a speech radius wider than that limited by a modem ASIC is partitioned by a predetermined radius unit into a plurality of speech spheres for the enlargement of the limited speech radius and channel elements are assigned to the partitioned speech spheres for transmission/reception of channels, a handoff operation is performed from an arbitrary channel element in the base station to a channel element assigned to a different speech sphere when a mobile station moves beyond an initial speech sphere during conversation with the arbitrary channel element. At this time, a reverse traffic channel is demodulated and remains at a standby state. Therefore, if the mobile station moves beyond the initial speech sphere above the predetermined radius unit, the demodulated reverse traffic channel is selected and utilized by the channel element assigned to the different speech sphere. This has the effect of preventing a speech disable state based on the inter-speech sphere movement of the mobile station.

Abstract translation: 一种用于在扩大CDMA移动通信系统中定时限制的语音半径的情况下，基于移动台的语音间移动来操作基站来解决语音禁用状态的方法。 在比由调制解调器ASIC限制的语音半径更宽的语音半径被预定的半径单位划分成用于扩大限制语音半径的多个语音球的基站中，并且将信道单元分配给分区语音球，以便发射/ 在通信的接收中，当移动站在与任意信道单元通话期间移动超过初始话音球时，从基站中的任意信道单元到分配给不同语音球的信道单元执行切换操作。 此时，反向业务信道被解调并保持在待机状态。 因此，如果移动站移动超过预定半径单位之上的初始语音球，则解调的反向业务信道被分配给不同语音球的信道单元选择并利用。 这具有基于移动台的语音间移动来防止语音禁止状态的效果。

公开(公告)号：US06496493B1

公开(公告)日：2002-12-17

申请号：US09311222

申请日：1999-05-13

Applicant: Chae Hun Chung

Inventor： Chae Hun Chung

IPC: H04Q720

CPC classification number: H04W36/30 ,  H04W24/10 ,  H04W48/08 ,  H04W84/06

Abstract: A handoff trial method by a mobile station that compares a pilot power strength of a base station providing communication service to the mobile station with a pilot power strength of a neighboring base station and attempts to handoff based on the comparing results. As a result of comparing, if the difference is larger than a pilot threshold to try handoff, the mobile station transmits a signal measurement message to the service base station for handoff to the neighboring base station. Also, if the mobile station communicated with a plurality of base stations tries to cut calls with the base stations, the mobile station measures pilot power strengths of the service base stations compares therebetween. As a result of the comparing, if the difference is smaller than a pilot threshold to cut call, the mobile station tries to cut call with the associated base station. The method has the effects that can reduce occurrence frequency of handoff, power consumption of the mobile station and signal processing loads of the service base station.

Abstract translation: 移动站的切换试验方法，其将提供通信服务的基站的导频功率强度与相邻基站的导频功率强度进行比较，并根据比较结果尝试切换。 作为比较的结果，如果差异大于导频阈值以尝试切换，则移动台向服务基站发送信号测量消息以切换到相邻基站。 此外，如果与多个基站通信的移动台试图用基站切断呼叫，则移动台测量服务基站之间的导频功率强度。 作为比较的结果，如果差异小于用于切断呼叫的导频阈值，则移动台尝试用相关联的基站切断呼叫。 该方法具有可以减少切换的发生频率，移动台的功耗和服务基站的信号处理负荷的影响。