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1. 发明专利

JPH0220137A SUBSCRIBER LINE MULTIPLE CONVERTER 失效
公开(公告)号：JPH0220137A
公开(公告)日：1990-01-23
申请号：JP16876488
申请日：1988-07-08
申请人： HITACHI LTD , TOKYO TELECOM NETWORK , OKI ELECTRIC IND CO LTD , NEC CORP , FUJITSU LTD
发明人： TENTOU TAKEYUKI , SAKAI TOMIO , TAKAHASHI HIROAKI , MOCHIZUKI TAKASHI , SATO KENICHI , SHIROMIZU YASUBUMI , SEKIGUCHI ISAMU
IPC分类号： H04J3/04 , H04J3/22
摘要： PURPOSE:To improve the efficiency of an actual use line and to miniaturize a device by connecting a TSI switching part and the subscriber line corresponding part having a line termination function corresponding to the classification of the device by a common interface having a prescribed transmitting speed. CONSTITUTION:A 6.3M interface part 1 at the station inside passes through a station side multiple separating part 2 and executes the line setting with a TSI(Time Slot Interchanger) switching part 3 of one surface constitution. A signal distributed by a switch passes through a subscriber multiple separating part 6 and is connected with a subscriber corresponding part 17 by a 2Mb/s common interface part 7. The subscriber corresponding part 17 is constituted of the 2Mb/s common interface part 7, a line termination part 13-1 and an interface part 14-1 as one example. Further, when the data communication service of the subscriber is increased, the subscriber corresponding part composed of a line termination part 13-2 and a 1.5Mb/s interface part 14-2 is added and thus, the extending can be executed. Thus, even for the device, in which the transmission speed and the frame constitution of an interface signal 15 at the subscriber side are different, the line termination can be executed by a line termination part 13 of the subscriber corresponding part, the extendability to another service is obtained.

2. 发明专利

JPH01278193A SUBSCRIBER'S PRIVATE LINE TERMINATING DEVICE 失效
公开(公告)号：JPH01278193A
公开(公告)日：1989-11-08
申请号：JP10539588
申请日：1988-04-30
申请人： OKI ELECTRIC IND CO LTD , TOKYO TELECOM NETWORK , HITACHI LTD , FUJITSU LTD , NEC CORP
发明人： SATO KENICHI , SHIOJIMA MASANORI , TAKAHASHI HIROAKI , MOCHIZUKI TAKASHI
IPC分类号： H04Q3/42 , H04J3/00
摘要： PURPOSE:To make a TDM unnecessary by providing an interface(TTC standard digital interface) means with a subscriber device such as a digital PBX, etc., in a DSU. CONSTITUTION:A means to convert alternately first frame constitution in an interface at a transmission path side and a first code, and second frame constitution in a TTC standard digital interface at the subscriber device side such as the private branch exchange(PBX), etc., and a third code is provided in the subscriber's private line terminating device(DSU). In other words, the PBXs 10a and 10b are connected directly to the DSUs 20a and 20b, respectively with the TTC standard digital interface, and a private network consisting of the PBX10a and the DSU20a is connected to the private network consisting of the DSU20a and the PBX10b via a transmission path network. In such a way, it is possible to make a time divisional multiplexer (TDM) unnecessary, and to improve profitability.

3. 发明专利

JPH0220135A SYNCHRONIZING MULTIPLE CONVERTER 失效
公开(公告)号：JPH0220135A
公开(公告)日：1990-01-23
申请号：JP17009288
申请日：1988-07-08
申请人： FUJITSU LTD , TOKYO TELECOM NETWORK , OKI ELECTRIC IND CO LTD , NEC CORP , HITACHI LTD
发明人： HAYASHI TAKUMI , SAKAI TOMIO , TAKAHASHI HIROAKI , MOCHIZUKI TAKASHI , SATO KENICHI , SHIROMIZU YASUBUMI , KAMEGOME MASAMICHI
IPC分类号： H04J3/06
摘要： PURPOSE:To reduce the empty transmission line capacity (number of lines) able to be generated by a signal from a subscriber line probabilisticly and to increase the line capacity of the subscriber line only for the part by making the subscriber line side line capacity of a line setting part larger than a transmission line side line capacity. CONSTITUTION:A transmission line interface part 1 to provide a receiving part 11 and a transmitting part 12, a receiving part 13 and a transmitting part 14 are provided. A subscriber line interface part 3 having the line capacity larger than the line capacity of the transmission line interface part 1 and a line setting part 2 are provided. The line setting part 2 is between both interface parts 1 and 3, has the memory capacity of the sum of the line capacity of both interface parts 1 and 3, stores the data from respective interface parts to a prescribed address for a handling group, reads the data and sets the transmission line or the subscriber line to be sent. Since the line capacity of a subscriber line 5 is larger than the line capacity of a transmission line 4, when the signal from the subscriber line, in which the empty condition occurs many times ordinarily, is transmitted to the transmission line, the empty line at the transmission line side can be reduced.

4. 发明专利

JPH01278138A FRAME SYNCHRONIZING SYSTEM 失效
公开(公告)号：JPH01278138A
公开(公告)日：1989-11-08
申请号：JP10539688
申请日：1988-04-30
申请人： OKI ELECTRIC IND CO LTD , TOKYO TELECOM NETWORK
发明人： SHIOJIMA MASANORI , FUNATSU JUNJI , AOKI CHIKAO , TAKAHASHI HIROAKI , MOCHIZUKI TAKASHI
IPC分类号： H04J3/06 , H04L7/08
摘要： PURPOSE:To improve frame synchronizing characteristics by combining code conversion rule violating bits and normal code conversion rule bits to form a frame synchronizing pattern of plural bits. CONSTITUTION:A transmission system consists of an encoding circuit 31, a line driver 32, a transmission line 33, a line receiver 34, a decoding circuit 35, a shift register 36, a synchronizing pattern detecting circuit 37, and a frame synchronizing circuit 38. A frame synchronizing pattern is formed with combination of the code conversion rule violating bits and the normal code conversion rule bits. In such constitution, the frame synchronizing characteristics obtained in a normal state of the line 33 are excellent and equivalent to the frame synchronizing characteristics obtained by said violating bits only. Then it is possible in an abnormal state of the line 33 to quickly detect the abnormality and also to reduce the pseudo synchronizing probability compared with the frame synchronizing characteristics obtained by the violating bits only.

5. 发明专利

JPH03219754A SUBSCRIBER FAULT CHANGEOVER SYSTEM 失效
公开(公告)号：JPH03219754A
公开(公告)日：1991-09-27
申请号：JP1464090
申请日：1990-01-24
申请人： FUJITSU LTD , TOKYO ELECTRIC POWER CO , TOKYO TELECOM NETWORK
发明人： OSAKI TAKAAKI , SAKAKI MASANORI , MOCHIZUKI TAKASHI
IPC分类号： H04M3/22
摘要： PURPOSE:To relieve the load of the software by providing a changeover means in which the access route is unchanged after and before the changeover with the software of an exchange main body even when a subscriber circuit is changed over into a standby subscriber circuit due to a fault. CONSTITUTION:Suppose that a fault takes place in a #1 subscriber circuit 2, changeover to a standby subscriber circuit 3 and the access route is switched by a means 10. A subscriber connecting to the #1 subscriber circuit is connected to a standby circuit 3 via a subscriber line test terminal 2d. Then a software 5a transfers switching control information of the terminal 2d on a drive point to the circuit 2. That is, it is not necessary to recognize the presence location (scanning/drive point) of the standby circuit 3 when viewed from the software 5a and the changeover means 10 implements the access route switching. Thus, the load of the software is relieved.

6. 发明专利

JPH02106122A POWER SOURCE INTERRUPTION DETECTING SYSTEM 失效
公开(公告)号：JPH02106122A
公开(公告)日：1990-04-18
申请号：JP25714388
申请日：1988-10-14
申请人： HITACHI LTD , TOKYO TELECOM NETWORK
发明人： KUDO YOSHIHIRO , MIYAMORI YOSHIO , TAJIMI NOBURO , TAKAHASHI HIROAKI , MOCHIZUKI TAKASHI
IPC分类号： H02H3/24 , H02H7/20 , H02M1/00 , H02M7/06
摘要： PURPOSE:To detect interruption of input easily based on detection of instantaneous interruption of AC commercial power source by identifying interruption of input if a large DC source voltage drop in a device is detected simultaneously with detection of instantaneous interruption of AC commercial power source. CONSTITUTION:An AC input is converted through a DC source circuit 1 in a device into DC power which is fed to various circuits and the voltage thereof is monitored through a voltage monitor circuit 4. AC input is monitored through an instantaneous interruption detecting circuit comprising a rectifier circuit 2 and a voltage monitor circuit 3 in parallel with DC voltage monitoring. DC source voltage in the device drops only slightly in case of instantaneous interruption but it drops considerably in case of interruption of input, and thereby interruption of input can be detected from a considerable droppage of DC source voltage when instantaneous interruption is detected. By such arrangement, interruption of AC commercial power source can be detected easily through existing instantaneous interruption detecting function and DC voltage drop detecting function in the device.

7. 发明专利

JPH0252536A DIGITAL OPTICAL TRANSMITTER 失效
公开(公告)号：JPH0252536A
公开(公告)日：1990-02-22
申请号：JP20443688
申请日：1988-08-17
申请人： TOKYO TELECOM NETWORK , MITSUBISHI ELECTRIC CORP
发明人： SAKAI TOMIO , MOCHIZUKI TAKASHI , MOTOJIMA KUNIAKI , MATSUSHITA KIWAMU , KITAYAMA TADAYOSHI
IPC分类号： H04B10/2507 , H04B10/54
摘要： PURPOSE:To reduce the coherence length of a laser diode by using a sent digital signal and driving the laser diode with a current being the result of switching a high frequency signal having a sufficiently high frequency. CONSTITUTION:A digital signal to be sent is given to a digital signal input terminal 2 of a transmitter 1 and a high frequency signal having a sufficiently higher frequency than the signal band of the digital signal to be sent is given to a high frequency signal input terminal 3, the transmitter 1 uses the digital signal to be sent to switch the high frequency signal thereby generating a laser diode(LD) drive current. When the LD 4 receives modulation with a sufficiently high frequency, the multi-longitudinal mode oscillation is attained and the width of each longitudinal mode line is increased and the luminescent spectrum is processed as the multi-mode, then the coherence length of the signal light is selected to be several m or below. Thus, the length of the single mode optical fiber 5 is selected to be nearly 10m, the production of modal noise at discontinuous points of optical connectors 8, 9 or the like on a transmission line is suppressed sufficiently lower.

8. 发明专利

JP2006345363A WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD 审中-公开
公开(公告)号：JP2006345363A
公开(公告)日：2006-12-21
申请号：JP2005170752
申请日：2005-06-10
申请人： NTT DOCOMO INC , NEC CORP , FUJITSU LTD
发明人： SAWAHASHI MAMORU , HIGUCHI KENICHI , ATARASHI HIROYUKI , MOCHIZUKI TAKASHI , NAKAMURA MITSUYUKI , SEKI HIROYUKI
IPC分类号： H04B7/26 , H04J11/00
摘要： PROBLEM TO BE SOLVED: To provide a wireless communication device which reduces an information amount of a control channel, and adequately makes a transmission power control of the control channel. SOLUTION: A wireless communication device adaptively controls a modulation method of a data channel and an encoding rate (MCS) on the basis of received channel state information (CQI). In this case, the wireless communication device is provided with: a first data table indicating correspondence between the CQI and the MCS; a second data table indicating correspondence between the CQI and a transmission power of a control channel; a means for receiving the CQI from a communication party on the other end; and a means for accessing the first data table and selecting the MCS of the data channel corresponding to the received CQI. The wireless communication device is also provided with: a means for accessing the second data table and selecting a transmission power of a control channel corresponding to the received CQI; and a means for transmitting a data channel by a selected modulation method and encoding rate and transmitting the control channel based on the selected transmission power. COPYRIGHT: (C)2007,JPO&INPIT

9. 发明专利

JP2014082531A Data collection system and wireless base station 审中-公开
标题翻译：数据采集系统和无线基站
公开(公告)号：JP2014082531A
公开(公告)日：2014-05-08
申请号：JP2010293333
申请日：2010-12-28
申请人： Nec Corp , 日本電気株式会社
发明人： MOCHIZUKI TAKASHI
IPC分类号： H04W16/28 , H04M11/00 , H04Q9/00 , H04W4/04
CPC分类号： H04W24/10 , H04W16/28
摘要： PROBLEM TO BE SOLVED: To provide a data collection system in which the fact that the collected data does not move can be utilized effectively.SOLUTION: A data collection system comprises: data collection terminals 10-1, 10-2, ... for collecting predetermined data at specific locations; and wireless base stations 20-1, 20-2, ... with which the data collection terminals 10-1, 10-2, ... are connected wirelessly. The wireless base stations 20-1, 20-2, ... comprise azimuth memories 21-1, 21-2 for storing the information about the azimuth of a specific locations where the data collection terminals 10-1, 10-2, ... are arranged, and control the wireless beam formation direction so that the wireless beam is directed toward the data collection terminals 10-1, 10-2, ..., based on the information about the azimuth stored in the azimuth memories 21, when communicating with the data collection terminals 10-1, 10-2, ...
摘要翻译：要解决的问题：提供可以有效利用所收集的数据不移动的事实的数据收集系统。解决方案：数据收集系统包括：数据收集终端10-1,10-2，...用于在特定位置收集预定数据; 以及数据收集终端10-1,10-2，...无线连接的无线基站20-1,20-2，...。无线基站20-1,20-2，...包括方位存储器21-1,21-2，用于存储关于数据采集终端10-1,10-2,2-2-2-2的特定位置的方位角的信息。并且控制无线射束形成方向，使得无线束基于存储在方位存储器21中的方位角的信息指向数据采集终端10-1,10-2，...，当与数据收集终端10-1,10-2，...

10. 发明专利

JP2002344548A DATA TRANSMITTER-RECEIVER 失效
公开(公告)号：JP2002344548A
公开(公告)日：2002-11-29
申请号：JP2001145929
申请日：2001-05-16
申请人： NEC CORP
发明人： MOCHIZUKI TAKASHI
IPC分类号： G06F11/10 , H04L1/00 , H04L27/00 , H04L27/34
摘要： PROBLEM TO BE SOLVED: To provide a data transmitter-receiver which is improved in error correction performance, taking advantage of the reliability of determination at demodulation corresponding to bit mapping in higher order QAM. SOLUTION: An error correction encoder 2 enables input bit strings to undergo an error correction encoding process, and the bit strings subjected to the process are outputted as sorted out corresponding to their conduciveness to error correction characteristics. A higher order QAM modulator 4 outputs so as to map bit strings having high conduciveness to error correction characteristics onto signal points of high judgement reliability in demodulation and bit strings having low conduciveness to error correction characteristics onto signal points of low judgement reliability in demodulation.

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