公开(公告)号：JPH02309841A

公开(公告)日：1990-12-25

申请号：JP13208289

申请日：1989-05-25

Applicant: TOSHIBA CORP

Inventor： OGURA KOJI ,  SERIZAWA MUTSUMI

IPC: H04L27/36

Abstract: PURPOSE:To increase an IF frequency with no adjustment by making a sampling frequency of a digital signal to be 4 times the carrier frequency. CONSTITUTION:A data signal inputted to data input points 25, 26 is sampled respectively by sampling circuits 27, 28, passes through digital filters 29, 30 and carriers costheta, sintheta from a carrier generating circuit 33 are modulated into an IF band at multipliers 31, 32. Then the modulated waves are synthesized by an adder 34 and converted into an analog signal at a D/A converter 35. Then the signal passes through a DC cut-off filter 36 and the DC component is eliminated and send to the antenna. In this case, the relation of fs=4fc exists, where fs is the sampling clock frequency and fc is the carrier frequency. Since the interleave of sampling frequency is attained, the IF frequency is increased with no adjustment.

公开(公告)号：JPH01177725A

公开(公告)日：1989-07-14

申请号：JP133388

申请日：1988-01-08

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI

IPC: H04B7/26

Abstract: PURPOSE:To improve the traffic by sending a received signal from a mobile station to a control station with a time interval when plural base stations receive the signal from the mobile station and preventing the collision of signals between each base station and the control station. CONSTITUTION:An information signal from a paging control station 2 is sent to plural base stations 3-5 via a transmission line 6. The information is sent to a mobile station 8 in radio from the plural base stations 3-5. The mobile station 8 confirms the information signal sends back an acknowledge signal. When the plural base stations 3-5 receive the acknowledge signal, the plural base stations 3-5 send a signal to the control station 2 at a time interval respectively. Thus, the collision of signals is avoided and the traffic is improved.

公开(公告)号：JPS6343429A

公开(公告)日：1988-02-24

申请号：JP18690786

申请日：1986-08-11

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI

IPC: H04B7/15 ,  H04B7/204

Abstract: PURPOSE:To prevent excessive line congestion and delay in transmission through a CSC line by storing once an unurgent data of a small capacity and sending the data together when a DAMA line is opened by other matter. CONSTITUTION:An earth station is provided with a memory for stations A, B, C,...and accommodates many terminal equipments such as fax telephone and electronic mail. The information with small capacity and not requiring urgency among the information of the terminal equipments is stored in a memory once corresponding to a transmission opposite station. When any of terminal equipments accommodated in the earth station sends information with large capacity or urgency, a DAMA slave station equipment requests the line assignment and when the line is opened, the information with large capacity or urgency is sent and the content of the memory corresponding to an opposite station is sent at the same time.

公开(公告)号：JPS61274456A

公开(公告)日：1986-12-04

申请号：JP11592385

申请日：1985-05-29

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI ,  SUZUKI HIDEO

IPC: H04L27/38 ,  H04L27/00 ,  H04L27/22

Abstract: PURPOSE:To operate at high speed and to make the scale of a circuit smaller as a whole by converting an inputted digital signal series which is in an orthogonal phase relation to a phase information by a conversion table and detecting a timing information included in the signal series from the output of the conversion table. CONSTITUTION:A pair of signals having the orthogonal phase relation which are converted orthogonally and are obtained from a digital modulating signal at a receiving side are inputted to terminals 1 and 2 and after converted to digital signal series at A/D converters 3 and 4, they are inputted to a conversion table 5. The conversion table 5 outputs the phase information corresponded with the combination of digital values which represent the amplitudes of the inputted pair of digital signal series at every time of day as a digital signal. The output signal of the conversion table 5 is introduced to a synchronizing demodulation circuit and also, is inputted to a clock phase error detecting circuit 6 having the function of a timing information detecting means. And the output of a VCO at a clock generating circuit 7 is supplied to A/D converters 3 and 4 as a sampling clock.

公开(公告)号：JP2006222992A

公开(公告)日：2006-08-24

申请号：JP2006113880

申请日：2006-04-17

Applicant: TOSHIBA CORP

Inventor： TAKAGI MASAHIRO ,  KAMAGATA EIJI ,  KATO NORIYASU ,  TSUNODA KEIJI ,  NAKAKITA KUMIKO ,  NOUJIN KATSUYA ,  SERIZAWA MUTSUMI

IPC: H04L12/701 ,  H04L12/835 ,  H04L12/865 ,  H04L12/893

Abstract: PROBLEM TO BE SOLVED: To provide a highly reliable gateway device for improving the performance of communications utilizing a transport layer connection provided by setting up the transport layer connection between a wire terminal and a radio terminal in a form suitable for an application without changing implementation of the transport layer of a terminal connected to a wire network. SOLUTION: The gateway device for relay connecting the radio network and the wire network determines whether the transport layer connection between a radio terminal connected to the radio network and a terminal connected to the wire network is set up in two-divided forms of the transport layer connection for communication with the wire network and the transport layer connection for communication with the wire network or a message passes through not by way of the division connections according to types of applications known from a transport layer protocol data unit for requesting setting up of the transport layer connection between the terminals. COPYRIGHT: (C)2006,JPO&NCIPI

公开(公告)号：JP2004040256A

公开(公告)日：2004-02-05

申请号：JP2002191407

申请日：2002-06-28

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： SERIZAWA MUTSUMI ,  MUKAI MANABU

IPC: G06F15/16 ,  G06F9/50 ,  H04L27/00

Abstract: PROBLEM TO BE SOLVED: To provide a signal processing apparatus configuring a wireless communication terminal.
SOLUTION: The wireless communication terminal comprises: overall signal processing units (21, 22, 23) including general-purpose processors; and a plurality of signal processing units, the signal processing units including processors (31 to 36) for executing processing by a software system including the same instruction words as those of function blocks (25 to 30) performing different processes. Each function block is operated directly or selectively according to an instruction of a corresponding processor or according to a program produced by the instruction, the signal processing units are controlled by the overall signal processing units, and the processor of each signal processing unit is operated according to the instruction of the general-purpose processors.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2003348004A

公开(公告)日：2003-12-05

申请号：JP2002157070

申请日：2002-05-30

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： SEKINE SHUICHI ,  SERIZAWA MUTSUMI ,  SHIYOUKI HIROKI ,  MURAKAMI YASUSHI ,  ODATE KISHO ,  TSUJIMURA TERUHIRO ,  INOUE KAZUHIRO ,  ITO TAKAYOSHI

IPC: H01Q3/26 ,  H04B7/10 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To enable stable reception by transmitting/receiving radio signals in cooperation with other radio communication apparatus.
SOLUTION: This radio communication apparatus is provided with an antenna array 2 having a plurality of first antennas 1, a phase shift circuit 3, a reception circuit 4, a control circuit 5, a second antenna 6 and radio device 7 for other apparatus. The stable reception is enabled for the reason that a phase and an amplitude of the antenna array 2 are set by using control signals in other radio communication apparatus since the control signal of the antenna array 2 is transmitted to other radio communication apparatus via the second antenna 6 and on the contrary, the control signal of the antenna array 2 in other radio communication apparatus is received via the second antenna 6. In addition, if representative radio communication apparatus is determined, a radio communication apparatus except it can control the antenna array 2 by using a control signal from the representative radio communication apparatus, thus, processing of individual radio communication apparatus is simplified.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：通过与其他无线电通信装置协作来发送/接收无线电信号来实现稳定的接收。 解决方案：该无线电通信装置设置有具有多个第一天线1，相移电路3，接收电路4，控制电路5，第二天线6和其他无线电装置7的天线阵列2 仪器。 由于天线阵列2的控制信号经由第二天线发送到其他无线电通信装置，因此通过使用其他无线电通信装置中的控制信号来设置天线阵列2的相位和幅度，因此能够进行稳定接收 相反，其他无线电通信装置中的天线阵列2的控制信号经由第二天线6被接收。此外，如果确定了代表性无线电通信装置，则除了它之外的无线电通信装置可以控制天线阵列2 通过使用来自代表性无线通信装置的控制信号，简化了各个无线通信装置的处理。 版权所有（C）2004，JPO

公开(公告)号：JP2003332977A

公开(公告)日：2003-11-21

申请号：JP2002143507

申请日：2002-05-17

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： AOKI TSUGUHIDE ,  ADACHI TOMOKO ,  TOSHIMITSU KIYOSHI ,  SEKINE SHUICHI ,  SERIZAWA MUTSUMI ,  SHIYOUKI HIROKI ,  TSURUMI HIROSHI ,  OBAYASHI SHUICHI ,  SAKATA REN

IPC: H04B7/26 ,  H04L12/28 ,  H04W4/06 ,  H04W16/26 ,  H04W28/00 ,  H04W88/02 ,  H04Q7/38

CPC classification number: H04W88/02

Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication system which is excellent in transmission efficiency and power efficiency.
SOLUTION: The wireless communication system includes a wireless base station 10 provided in a communication service area 10 and a plurality of wireless terminals 20 for communicating with the base station 10 via radio channels. Representative one of the wireless terminal stations receives a transmission frame from the base station and transmits the received frame to the respective terminals belonging to the terminal group. Consequently, transmission power of the base station can be reduced, and a large quantity of data such as a moving image or still image can be easily transmitted from the base station to the terminal group. Since the representative terminal can be dynamically changed, one of the terminals having a good wave reception state can be allocated as representative one, stable and reliable communication can be established.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种传输效率和功率效率优异的无线通信系统。 解决方案：无线通信系统包括设置在通信服务区域10中的无线基站10和用于经由无线电信道与基站10通信的多个无线终端20。 无线终端站中的代表一个从基站接收传输帧，并将接收到的帧发送到属于终端组的各个终端。 因此，可以减少基站的发送功率，并且可以容易地从基站向终端组发送诸如运动图像或静止图像的大量数据。 由于代表性终端可以动态地改变，所以可以将具有良好的波接收状态的终端之一分配为代表性的终端，可以建立稳定可靠的通信。 版权所有（C）2004，JPO

公开(公告)号：JP2003332963A

公开(公告)日：2003-11-21

申请号：JP2002143546

申请日：2002-05-17

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： SAKATA REN ,  SEKINE SHUICHI ,  SERIZAWA MUTSUMI ,  SHIYOUKI HIROKI ,  TSURUMI HIROSHI ,  OBAYASHI SHUICHI ,  ADACHI TOMOKO ,  TOSHIMITSU KIYOSHI ,  AOKI TSUGUHIDE

IPC: H04B7/26 ,  H04B7/15 ,  H04B17/40 ,  H04L12/28 ,  H04W16/26 ,  H04W16/28 ,  H04W84/18

CPC classification number: H04W84/18

Abstract: PROBLEM TO BE SOLVED: To provide a communication system which increases the transmission capacity and improves the frequency utilization efficiency and the communication quality. SOLUTION: The radio communication system comprises a group 2 of a plurality of originating terminals 1 which mutually transmit and receive control signals S1 to distribute and transmit radio signals, and a group 4 of a plurality of address terminals 3 which mutually transmit and receive the control signals S2 to receive the radio signals from the originating terminal group 2 approximately at the same time. The plurality of originating terminals 1 in the originating terminal group 2 distribute and transmit the signals, and the plurality of address terminals 3 in the address terminal group 4 receive the distributed signals. This realizes a MIMO transmission between the originating terminal group 2 and the address terminal group 4, and facilitates transmission of a large amount of data at a high speed. Thus, the frequency utilization efficiency is improved and the transmission capacity is increased. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供增加传输容量并提高频率利用效率和通信质量的通信系统。 解决方案：无线电通信系统包括多个发起终端1的组2，它们相互发送和接收控制信号S1以分发和发送无线电信号，以及多个地址终端3的组4，其相互发送和 接收控制信号S2以同时接收来自始发终端组2的无线电信号。 始发终端组2中的多个始发终端1分配和发送信号，并且地址终端组4中的多个地址终端3接收分布式信号。 这实现了始发终端组2和地址终端组4之间的MIMO传输，并且便于高速传输大量的数据。 因此，提高了频率利用效率，提高了传输容量。 版权所有（C）2004，JPO

公开(公告)号：JPH08275243A

公开(公告)日：1996-10-18

申请号：JP10034695

申请日：1995-03-31

Applicant: TOSHIBA CORP

Inventor： OGURA KOJI ,  MORIYA OSAMU ,  SERIZAWA MUTSUMI ,  SUGAWARA TSUTOMU ,  NOUJIN KATSUYA

IPC: H04W16/24 ,  G06F17/30 ,  H04L12/28 ,  H04W16/20 ,  H04W88/02 ,  H04Q7/38

Abstract: PURPOSE: To acquire required information without any specific notice by adopting the configuration such that information on request is automatically acquired when a portable terminal equipment enters an area enabling communication with a radio base station. CONSTITUTION: The user enters a desired information item to a terminal equipment 4. The terminal equipment 4 detects the entrance of a communication area. The terminal equipment 4 makes an automatic call to a base station 2 to request the allocation of a radio channel. The base station 2 allocates the radio channel to set up a radio channel. Then the terminal equipment 4 reads an item of the acquisition request of information entered by the user from its own built-in memory and sends the information to an information service station 3 via a communication network 1. Then the information service station 3 sends a reply retrieval result to the terminal equipment 4 with respect to the question retrieval item made by the user via the communication network 1 and the base station 2. The terminal equipment 4 confirming the acquisition of the information makes interrupt procedure of a radio channel to 5 the communication network 1. Then the terminal equipment 4 reports the end of information acquisition to the user.