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11. 发明专利

JP2004023668A Base station apparatus and multi-address communication system for moving object 有权
公开(公告)号：JP2004023668A
公开(公告)日：2004-01-22
申请号：JP2002179027
申请日：2002-06-19
申请人： Nec Corp , 日本電気株式会社
发明人： KAWABATA TAKASHI
IPC分类号： H04B7/26 , H04J13/00 , H04W4/06 , H04W28/00 , H04W88/08 , H04Q7/38
CPC分类号： H04W74/006 , H04B1/707 , H04W88/08
摘要： PROBLEM TO BE SOLVED: To provide a base station apparatus and a multi-address communication system for a moving object in which high-speed data are transmitted to mobile terminals regardless of the number of the mobile terminals.
SOLUTION: A multi-address communication station 102 for sending multi-address communication data of audio or the like sends the data through a down high-speed line by a DS-CDMA scheme, for example, based upon a request from any one of 1st-4th mobile terminals 105
1 -105
4 . When sending, it is checked whether or not data of a quality higher than a reference can be sent to a target mobile terminal 105. Since the data are transmitted by using the same spread code for the same channel, even when there are a plurality of receiving mobile terminals 105, the data are transmitted by using one channel, so that the high-speed data can be transmitted.
COPYRIGHT: (C)2004,JPO

12. 发明专利

JP2003069465A Mobile communication network and arrangement method for spot beam of communication satellite 有权
标题翻译：通信卫星点波束的移动通信网络和布置方法
公开(公告)号：JP2003069465A
公开(公告)日：2003-03-07
申请号：JP2001251602
申请日：2001-08-22
申请人： Nec Corp , 日本電気株式会社
发明人： KAWABATA TAKASHI
IPC分类号： H04B7/15 , H04B7/155 , H04B7/185 , H04B7/19 , H04W4/00 , H04W16/26 , H04W48/18 , H04W84/00 , H04W84/06 , H04W92/24 , H04Q7/22
摘要： PROBLEM TO BE SOLVED: To provide a mobile communication system used for the purpose of supplementation of areas of ground cellular that can ensure traffic capacity of areas in which only satellite communication is available.
SOLUTION: The mobile communication system is provided with a mobile communication service controller 7 including a home location register 9 that is connected to a ground cellular network and a mobile satellite communication network to manage location information and telephone numbers of mobile devices and a memory 10 that stores ground cellular area information, the system has a network operating modes of a ground cellular out-area priority mode where the satellite communication mode takes precedence at the outside of the ground cellular area and an ordinary mode where full spot beams are available without the priority mode, a mobile satellite communication channel control station 4 in the ground cellular out-area priority mode discriminates the availability of each spot beam of a communication satellite via a satellite communication base station 5 on the basis of the area information in the ground cellular area information memory and does not allocate the satellite spot beam to the area available of the ground cellular communication as its control.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供用于补充地面蜂窝的区域的移动通信系统，其可以确保只有卫星通信可用的区域的业务能力。解决方案：移动通信系统设置有移动通信服务控制器7，其包括连接到地面蜂窝网络的归属位置寄存器9和用于管理移动设备的位置信息和电话号码的移动卫星通信网络以及存储器10，存储地面蜂窝区域信息，系统具有地面蜂窝外区域优先模式的网络操作模式，其中卫星通信模式在地面蜂窝区域的外部优先，并且具有无优先权的全波束可用的普通模式地面蜂窝区域优先模式中的移动卫星通信信道控制站4基于地面蜂窝区域信息中的区域信息，经由卫星通信基站5区分通信卫星的每个点波束的可用性存储器并且不将卫星点波束分配给ar 可用的地面蜂窝通信作为其控制。

13. 发明专利

JP2000224087A CIRCUIT AND METHOD FOR AUTOMATIC TRANSMISSION OF MOBILE STATION FOR MOBILE SATELLITE COMMUNICATION 失效
公开(公告)号：JP2000224087A
公开(公告)日：2000-08-11
申请号：JP2429699
申请日：1999-02-01
申请人： NEC CORP
发明人： KAWABATA TAKASHI
IPC分类号： H04B7/15 , H04B7/185 , H04W88/02 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To enable mobile station of a mobile satellite communication system to originate a call, even when the station is not possible to always make communication with a satellite due to geographical conditions, etc. SOLUTION: A mobile station 1 accumulates data to be transmitted into a memory 15 from a microphone 17 or data terminal 19 via a control section 14 and, when the reception quality detected by means of a reception quality detecting section 13 is a specific value or higher, automatically originates a call and transmits the accumulated data. In addition, the station 1 displays the fact of the normal completion of the transmission or a failure in a displaying section 16.

14. 发明专利

JP2006352643A MOBILE COMMUNICATION SYSTEM, MOBILE TERMINAL, AND MOBILE TERMINAL TRANSMISSION SCHEDULING METHOD 审中-公开
公开(公告)号：JP2006352643A
公开(公告)日：2006-12-28
申请号：JP2005177815
申请日：2005-06-17
申请人： NEC CORP
发明人： NISHIMURA OSAMI , KAWABATA TAKASHI , SAKUMA EMIKO , HASEBA YUKIO , KONDO DAISUKE
IPC分类号： H04W36/08 , H04W36/18 , H04W36/32 , H04W92/12
摘要： PROBLEM TO BE SOLVED: To decrease interference in an adjacent cell immediately before or after a soft handover state. SOLUTION: When a difference of respective received power of down-signals transmitted from base stations 2 and 4 and received at a mobile terminal 1 becomes smaller than a first difference threshold, correction of scheduling for the mobile terminal 1 is requested of a base station control device 8, and a start of the correction is directed from the base station control device 8 to the base station 2. When the difference of the respective received power becomes larger than a second difference threshold afterwards, cancellation of the correction of scheduling for the mobile terminal 1 is requested of the base station control device 8, and termination on the correction is directed from the base station control device 8 to the base station 2. Since the start of the correction is directed until the mobile terminal 1 turns into the soft handover state, or since the terminal device 1 is no more in the soft handover state until the termination of the correction is directed, a transmission rate control signal corrected so as to decrease the transmission rate from the mobile terminal 1 is transmitted to the mobile terminal 1 from the base station 2. COPYRIGHT: (C)2007,JPO&INPIT

15. 发明专利

JP2001196975A SYNCHRONIZATION ACQUISITION CIRCUIT FOR CDMA WIRELESS BASE STATION 失效
公开(公告)号：JP2001196975A
公开(公告)日：2001-07-19
申请号：JP2000008207
申请日：2000-01-17
申请人： NEC CORP
发明人： KAWABATA TAKASHI
IPC分类号： H04B1/707 , H04B1/7075 , H04B7/26 , H04L7/00 , H04W56/00 , H04W88/08
摘要： PROBLEM TO BE SOLVED: To provide a synchronization acquisition circuit that can realize detection of a received phase with high accuracy without increasing the scale of the synchronization acquisition circuit at a base station. SOLUTION: The synchronization acquisition circuit for a CDMA wireless base station is provided with a plurality of correlation devices (2a-2c) that execute a correlation arithmetic operation between a spread code and a plurality of quasi-synchronizing signals corresponding to a plurality of received signals of the CDMA system, a plurality of spread code generating circuits (3a-3c) that supply a plurality of spread codes referenced by the correlation arithmetic operation to the correlation devices, and a phase shift instruction circuit (7) that executes a synthesis correlation arithmetic operation on the basis of the synthesized quasi-synchronizing signal resulting from synthesizing a plurality of the quasi-synchronizing signals and instructs a plurality of the spread code generating circuits on the phase shift in response to the result of the synthesis correlation arithmetic operation.

16. 发明专利

JPH07231339A TRANSMITTER FOR TERMINAL EQUIPMENT FOR MOBILE OBJECT SATELLITE COMMUNICATION 失效
公开(公告)号：JPH07231339A
公开(公告)日：1995-08-29
申请号：JP31672694
申请日：1994-12-20
申请人： NEC CORP
发明人： KAWABATA TAKASHI
IPC分类号： H04L27/20
摘要： PURPOSE:To provide a transmitter for removing the influence of AM/PM convert distortion in a high frequency power amplifier. CONSTITUTION:This transmitter is composed of a Nyquist filter 11 for inputting two sequences of transmitting signals, envelope equalizer 12 for equalizing an envelope (locus) in the case of orthogonally axially displaying the respective phase points of an output from the filter 11 at a fixed value specified from an origin, phase modulator 13 for inputting the output of the envelope equalizer 12, and high frequency power amplifier 14 for inputting the output of the phase modulator 13.

17. 发明专利

JP2000124874A DEVICE AND METHOD FOR RELAY TRANSMISSION FOR SPREAD SPECTRUM COMMUNICATION AND RECORDING MEDIUM WITH CONTROL PROGRAM RECORDED THEREIN 失效
公开(公告)号：JP2000124874A
公开(公告)日：2000-04-28
申请号：JP29897998
申请日：1998-10-21
申请人： NEC CORP
发明人： KAWABATA TAKASHI
IPC分类号： H04J13/00 , H04B1/707 , H04B7/216 , H04J13/18
摘要： PROBLEM TO BE SOLVED: To provide spread spectrum communication relay transmission equipment, capable of relay transmission while effectively utilizing frequencies without lowering the reception quality. SOLUTION: A spreading code sequence control part 15 of a repeater 1 discriminates the spreading code of a received signal, based on a correlative value outputted by a correlator 13 and outputs a spreading code sequence A and a spreading code sequence B, having mutual correlative characteristics orthogonal to the spreading code sequence A or having nearly the same characteristics. A spreader 16 spreads a regenerative signal through the spreading code sequence B outputted from the spreading code sequence control part 15. The regenerative signal spread by the spreader 16 is transmitted through a modulating part 17, transmitting part 18 and transmitting antenna 19 to a receiver 2. A spread code sequence control part 25 of the receiver 2 discriminates the spread code of the received signal, based on a correlative value outputted by a correlator 23 and outputs the spreading code sequence B.

18. 发明专利

JPH10229646A BATTERY RESIDUAL QUANTITY INDICATING CIRCUIT 失效
公开(公告)号：JPH10229646A
公开(公告)日：1998-08-25
申请号：JP33705697
申请日：1997-12-08
申请人： NEC CORP
发明人： KAWABATA TAKASHI
IPC分类号： G01R19/165 , G01R31/36 , H02J7/00 , H04B1/3822 , H04B1/40 , H04M1/00 , H04W52/02 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To provide a battery residual quantity indicating circuit which can stably judge the residual quantity of a battery. SOLUTION: The residual quantity judging part of a battery residual quantity indicating circuit measures the voltage of a battery at a step S21. When the mode transition is detected at a step 22, this does not perform subsequent processing but returns to the step S21. When a waiting mode is judged at a step S23, this compares the detected battery voltage with the battery voltage and judges the residual quantity of the battery. In case that it is judged to be in a sending mode, this obtains the quantity of a voltage drop in sending at a step S25, and subtracts the obtained quantity of voltage drop from the battery voltage in a standby mode juste prior to this at a step S26 and converts it into the battery voltage in the standby mode. At a step S27, this compares the converted battery voltage with a threshold to obtain the residual quantity of the battery.

19. 发明专利

JPH08274826A RADIO COMMUNICATION TERMINAL STATION 失效
公开(公告)号：JPH08274826A
公开(公告)日：1996-10-18
申请号：JP7510195
申请日：1995-03-31
申请人： NEC CORP
发明人： KAWABATA TAKASHI
IPC分类号： H04L27/18 , H04B1/38 , H04L7/033
摘要： PURPOSE: To provide a local oscillation frequency and a transmission clock frequency with high accuracy by improving the degree of stability for the carrier wave frequency or clock frequency of a base station transmitted wave. CONSTITUTION: This station is provided with a demodulation part 4 for reproducing a carrier wave signal and a clock signal from a received signal, oscillator with frequency control function (TCXO) 7, AFC 6 for controlling the oscillator 7 with a regenerative carrier wave signal as a reference and synthesizer 3 defining the output of the oscillator 7 as a reference clock, and provided with a frequency divider 8 for outputting a receiving clock signal and a transmitting clock signal by dividing the frequency of an output from the oscillator and a phase comparator 14 for comparing the phase of the reproduced clock signal with the phase of a received clock outputted from the frequency divider. Further, this station is composed of a frequency dividing controller 9 for controlling the frequency dividing ratio of the frequency divider 8 based on the output of the phase comparator. Thus, the transmission clock frequency with the high degree of stability can be maintained even without providing any highly stable crystal oscillator for the transmission clock.

20. 发明专利

JPH05199124A VOICE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH05199124A
公开(公告)日：1993-08-06
申请号：JP872692
申请日：1992-01-21
申请人： NEC CORP
发明人： KAWABATA TAKASHI
IPC分类号： G10L19/00 , H03M13/09 , H03M13/23 , H04B14/04 , H04L1/00
摘要： PURPOSE:To reduce the effect of a burst error and to suppress a required Eb/No low in the voice communication system provided with a voice coder and a voice decoder. CONSTITUTION:A voice coder 10 is made up of a voice coder 11 converting a voice signal into a digital signal, a cyclic coder 12 receiving the digital signal and applying cyclic coding to the signal, a convolution coder 13 implementing convolution coding. On the other hand, a voice decoder 20 is made up of a maximum likelihood decoder 21 applying maximum likelihood decoding to an input signal, an error detector 22 detecting a burst error in an output of the maximum likelihood decoder 21 and a voice decoder 23 decoding the signal into a voice signal while interpolating the burst error.

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