中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

374 records (took 0.02 seconds)

    METHOD AND DEVICE FOR COMMUNICATION
    21.
    发明专利
    METHOD AND DEVICE FOR COMMUNICATION 失效

    公开(公告)号：JP2000232687A

    公开(公告)日：2000-08-22

    申请号：JP30707199

    申请日：1999-10-28

    Applicant: INMARSAT LTD

    Inventor： FRANCHI ANTONIO ,  NEMES JOHNNY ,  VILACA MARCUS H S ,  RICE MARK ,  GRAY PAUL KINGSLEY ,  MORRISON IAN

    IPC: H04L27/18 ,  H04B7/005 ,  H04L1/00 ,  H04L29/08 ,  H04Q7/38

    Abstract: PROBLEM TO BE SOLVED: To make it possible to change a modulation method in accordance with a transmission parameter by modulating data by a variable modulation method, transmitting modulated data through a radio link, changing the rate of data transmission on the radio link in accordance with a modulation method and transmitting the modulated data together with a code indicating the data rate to be used for transmission. SOLUTION: Data are outputted from a MODEM interface device 22 to a multiplexer 24 and multiplexed by using a signaling information input inputted from a signaling unit buffer 25. The data are scrambled by a scrambler 26 by using a scrambling vector encoded by an encoder 28 determined during the setting of a call. Data from the encoder 28 and a parity bit are buffered by a transmission synchronizer and outputted to a demodulator 32. The demodulator 32 demodulates each bit set as a symbol and selects the transmission of a data rate in a prescribed band width.

    METHOD AND SYSTEM FOR CHANNEL ASSIGNMENT
    22.
    发明专利
    METHOD AND SYSTEM FOR CHANNEL ASSIGNMENT 失效

    公开(公告)号：JP2000152321A

    公开(公告)日：2000-05-30

    申请号：JP32592199

    申请日：1999-10-12

    Applicant: INMARSAT LTD

    Inventor： HOWARD CHRIS FRANK ,  CHRISTODOULIDES LOUIS MIMIS ,  FEBVRE PAUL ,  MUDGE DAVID DENIS ,  JAMES STABIL

    IPC: H04B7/185 ,  H04B7/212 ,  H04L12/56 ,  H04L29/06 ,  H04W12/06 ,  H04W60/00 ,  H04W72/04 ,  H04W72/12 ,  H04Q7/38

    Abstract: PROBLEM TO BE SOLVED: To provide the method for authenticating a terminal in a radio communication service. SOLUTION: This method includes a step, where a registration request is received from a terminal requesting an access, a step where a signaling channel assignment signal to definitely assign a duplicate signal channel to each terminal is transmitted to each terminal, a step where an authentication request signal is transmitted through the signaling channel, a step where the authentication request signal is received through the channel, and a step where whether or not the access to the system is permitted is decided according to contents of the authentication reply signal. The contents of the authentication reply signal depend on the contents of the authentication request signal.

    Apparatus and method for sending data
    23.
    发明专利
    Apparatus and method for sending data 审中-公开

    公开(公告)号：JP2004104821A

    公开(公告)日：2004-04-02

    申请号：JP2003366104

    申请日：2003-10-27

    Applicant: Inmarsat Ltd ,  インマルサット リミテッド

    Inventor： KAWAI NOBUYUKI ,  WONG HOK SHUEN ,  MCTIFFIN MICHAEL JOHN ,  RANDALL DAVID

    IPC: H04B7/26 ,  H04B7/185 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L29/08 ,  H04Q7/34

    CPC classification number: H04L1/1685 ,  H04B7/18523 ,  H04B7/18582 ,  H04L1/1809 ,  H04L1/187 ,  H04L1/1887 ,  H04L2001/0093

    Abstract: PROBLEM TO BE SOLVED: To provide an apparatus and a method for propagating data on a status of a user terminal in a mobile communication system from a central register to a plurality of local registers.
    SOLUTION: Data on the status of a user 12 are simultaneously transmitted from a GLR-N 4 to a GLR-L 10 via a satellite 8 in an HDLC form. Each GLR-L 10 requests the retransmission of all HDLC frames which are not accurately received. The GLR-N 4 records a frame which is first transmitted among frames which are not confirmed by all the GLR-L 10 yet and when a new frame is corresponding to the outside of a range of a transmission window for the first transmitted frame, the transmission of the said frame is inhibited. The GLR-N 4 performs polling to the GLR-L 10 for the retransmission request, and the GLR-L 10 also transmits the request of no demand to the GLR-N 4. Even when a plurality of requests are transmitted for the same frame within predetermined time, the GLR-N 4 retransmits the frame just once.
    COPYRIGHT: (C)2004,JPO

    ANTENNA SYSTEM
    24.
    发明专利
    ANTENNA SYSTEM 审中-公开

    公开(公告)号：JP2003158417A

    公开(公告)日：2003-05-30

    申请号：JP2002267236

    申请日：2002-09-12

    Applicant: INMARSAT LTD

    Inventor： MUNOZ-GARCIA SAMUEL ,  NOMOTO SHINICHI ,  POSKETT PETER ,  MULLINS DENNIS ,  HUTCHINSON BEN ,  CHOMET PATRICK

    IPC: H01Q3/36 ,  H01P1/203 ,  H01P5/16 ,  H01Q1/28 ,  H01Q3/26 ,  H01Q3/38 ,  H01Q3/40 ,  H01Q21/06 ,  H01Q21/22 ,  H01Q25/00 ,  H04B7/15 ,  H04B7/204

    Abstract: PROBLEM TO BE SOLVED: To provide a communication station which generates or receives an angular dispersion array of radiation beams. SOLUTION: An antenna system is equipped with an array of a plurality of radiation elements (100) which determine an array antenna (1) and abeam generator (120), which is equipped with a passive network including a 1st side (X) mounted with a plurality of beam ports for electric signals corresponding to the beams and a 2nd side (Y) mounted with a plurality of antenna ports corresponding to the radiation elements; and the respective beam ports are connected to a plurality of antenna ports through a network of a plurality of power distributor (52) components and a plurality of phase shifter (53) components; and the phase shifting of the phase shifters is an integral multiple of a specified constant. The array antenna (1) is a communication station which has triangular or hexagonal symmetry, and the array of beams is a communication system which has triangular symmetry or hexagonal symmetry and is not deformed substantially.

    COMMUNICATION SYSTEM AND APPARATUS
    25.
    发明专利
    COMMUNICATION SYSTEM AND APPARATUS 审中-公开

    公开(公告)号：JP2003101673A

    公开(公告)日：2003-04-04

    申请号：JP2002183305

    申请日：2002-06-24

    Applicant: INMARSAT LTD

    Inventor： FELDMAN HOWARD ,  LYNAM HENRY

    IPC: H04L12/28 ,  H04L12/54 ,  H04L12/701 ,  H04L12/725 ,  H04L29/08 ,  H04M11/00 ,  H04W24/00 ,  H04W72/02 ,  H04W74/02 ,  H04Q7/38

    Abstract: PROBLEM TO BE SOLVED: To provide a communication system and a communication apparatus. SOLUTION: A software module executes selection of a circuit switching or packet switching for a communication session, according to stored mode preference data for expressing channel requirements and channel usage of an application. In step 80, the software module monitors the usage of connection during the communication session, to determine the transport efficiency of each current session. This information is used for modifying the stored mode preference data.

    METHOD AND DEVICE FOR COMMUNICATION
    26.
    发明专利
    METHOD AND DEVICE FOR COMMUNICATION 失效

    公开(公告)号：JP2000269887A

    公开(公告)日：2000-09-29

    申请号：JP32423999

    申请日：1999-11-15

    Applicant: INMARSAT LTD

    Inventor： FEBVRE PAUL ,  MUDGE DAVID DENIS

    IPC: H04B7/15 ,  H04B7/185 ,  H04B7/212 ,  H04B7/26

    Abstract: PROBLEM TO BE SOLVED: To obtain a novel communication method and a novel communication device. SOLUTION: A mobile terminal using a bandwidth assignment protocol for a mobile communication network reports the network about a bandwidth requirement and the network controls a size of a bandwidth used by the mobile terminal when receiving a report of the bandwidth requirement. The mobile terminal instructs the network about a total quantity of data awaited for transmission, a maximum delay time of part of the data requiring most urgent transmission, and the maximum delay time of part of data not requiring urgency most. On the occurrence of collision between transmission of two mobile terminals, the mobile terminals wait for a time interval controlled by the network before trying other contention based access transmission. The network periodically changes an available contention based access capacity according to an observed available level and/or a collision rate in the contention based access capacity assigned before.

    HIGH MARGIN NOTIFICATION METHOD AND APPARATUS
    29.
    发明授权
    HIGH MARGIN NOTIFICATION METHOD AND APPARATUS 失效
    方法和设备新闻发布改进的传输

    公开(公告)号：EP0943189B1

    公开(公告)日：2003-04-09

    申请号：EP97913304.8

    申请日：1997-11-19

    Applicant: Inmarsat Ltd.

    Inventor： CHAMBERS, Paul ,  CHAMBERS, Charles ,  BJÖRNSTRÖM, Gunnar, Arvid

    IPC: H04B7/26 ,  H04Q7/38 ,  H04Q7/22 ,  H04B7/185

    CPC classification number: H04W68/02 ,  H04B7/18534 ,  Y02D70/1222 ,  Y02D70/446

    Abstract: In a mobile communications system 10, a message is sent to a mobile terminal 16 which transmits an acknowledgement signal if the message is received. If the system 10 does not detect an acknowledgement signal, it transmits a high margin notification signal to the mobile terminal 16 to notify the terminal that an attempt was made to send the message. When the mobile terminal 16 has received a notification signal and subsequently comes within range of lower margin signals from the system, it sends a registration signal to the system. The system may then retransmit the message to the mobile terminal 16.

Patent Agency Ranking