Abstract: A security system 63 and an electronic device group 62 to be stored in a home network 6 are controlled by a home server 61. A home network management facility 5 obtains status information of the electronic device group 62 from home server 61. Home network management facility 5 displays the status of electronic device group 62 on a display unit of a terminal 1 based on the received status information. Home network management facility 5 also displays a screen for prompting input of a control instruction of the home-located electronic devices that are included in the electronic device group 62. Based on control instruction received via home server 61, home network management facility 5 performs remote control of electronic device group 62.
Abstract: A conventional link budget technique has not been fully applicable to a link design of a downlink in CDMA systems, which is now available by using both a power level of a radio channel in question and a total power level, which can be further refined by considering an orthogonality factor and an interference coefficient due to other base stations.
Abstract: A predistorter compensates, with high accuracy, for a distortion in each frequency band by a power amplifier that amplifies a transmission signal containing multiple frequency bands whose center frequencies are widely spaced apart. Signals of the respective frequency bands are extracted by multiple band signal extractors from the input signal containing transmission signals of multiple frequency bands; differences between the extracted signals and the output signal from the power amplifier are detected by multiple difference detectors in the respective bands; the detected difference signals are used as reference signals to read out compensation data from look-up tables for the respective frequency bands; the compensation data is added by multiple adders to the extracted transmission signals of the respective frequency bands; and the added outputs are combined by a combiner to provide the output signal from the predistorter.
Abstract: A radio communication system having a radio transmitter and a radio receiver and adopting multiple carrier modulation and code spreading modulation methods is disclosed. The radio communication system comprises a selecting unit provided in the radio transmitter or the radio receiver, for selecting an interleaving mode out of plural interleaving modes depending on radio propagation path conditions; a symbol configuration unit provided in the radio transmitter; and a symbol reconfiguration unit provided in the radio receiver. The symbol configuration unit configures information symbols to be transmitted by the radio transmitter in both time and frequency directions in a pattern according to the interleaving mode selected by the selecting unit, and the symbol reconfiguration unit reconfigures information symbols received by the radio receiver in both time and frequency directions in an inverse pattern of the pattern.
Abstract: A packet transmission control apparatus is configured to perform transmission control of packets to a plurality of mobile stations. The packet transmission control apparatus includes an acquirer configured to acquire a scheduling frequency which shows a frequency of scheduling of packets to each mobile station In a predetermined period, and a scheduler configured to control scheduling of packets to each mobile station In accordance with an acquired scheduling frequency.
Abstract: A multi-band feed-forward amplifier is formed by: a dividing part for dividing and applying an input signal containing signals of multiple frequency bands to a linear signal path and N vector adjustment paths of a distortion detecting circuit; frequency band signal extractors provided in the N vector adjustment paths, respectively, for extracting signals of N frequency bands; N vector adjusters for adjusting the vectors of the output signals from the respective frequency band signal extractors; a main amplifier for amplifying the output signals from the N vector adjusters; a combining/dividing part for combining the amplified signals and the signal from the linear signal path of the distortion detecting circuit and for dividing and applying the combined output to a linear signal path and N distortion injection paths of a distortion cancelling circuit; frequency band signal extractors provided in the N distortion injection paths, respectively, for extracting the signals of the N frequency bands; vector adjuste
Abstract: A communications terminal apparatus, a reception apparatus, and a method can enhance the effect of reducing the amount of information to be transmitted when text data is generated and transmitted. The communications terminal apparatus 100 stores key identifier definition information in a key identifier definition-storage area 1071. The communications terminal apparatus 100 obtains a key identifier corresponding to an operated key from the key identifier definition-storage area 1071 when the key is operated, and adds and stores it as a key identifier string in the input key identifier storage area 1073. The communications terminal apparatus 100 transmits the key identifier string stored in the input key identifier storage area 1073 by the transmission function 1031 when a transmit instruction is detected.
Abstract: The image encoding apparatus of one embodiment of the present invention comprises a coding mode determination unit, a prediction image generation unit, a storage unit, and an encoding unit. The coding mode determination unit determines a coding mode relating to which of the first image prediction processing or second image prediction processing is used for generating prediction image of a partial area of input images. The prediction image generation unit extracts the prediction assist information by the first image prediction processing and generates a prediction image based on the prediction assist information. The storage unit stores the reproduced image that is based on the prediction image. The encoding unit generates a bit stream comprising data obtained by encoding the coding mode information and prediction assist information.
Abstract: A gateway for interconnecting two networks, comprising a receiver, a controller, and a transmitter. The receiver receives from a first network a plurality of data units in all least one form. The controller temporarily stores the data units received by the receiver and outputs the data units on the basis of the dejitterizing capability of a destination terminal served by a second network, thereby reducing jitter among delays of the data units. The transmitter sends data units corresponding to the data units output by the controller to the destination terminal through the second network.
Abstract: A measuring device, with a display mode able to display separately map elements specified by a user selected from a list of map elements existing within the error span of the measured distance of a location by the help of which, the user can determine his/her own location and correct the measured distance of the location.
Type:
Grant
Filed:
May 24, 2002
Date of Patent:
July 26, 2005
Assignee:
NTT DoCoMo, Inc.
Inventors:
Atsushi Odakura, Aki Kariya, Hiroyuki Yamamoto, Katsutoshi Murata
Abstract: The present invention relates to a radio communications system which transmits same downlink information to a plurality of cells by using downlink common channels. The radio communications system includes a radio network controller and a base station. The radio communications system is configured to measure delays between the time when the radio network controller transmits the downlink information and the time when the base station transmits the downlink information to each of the plurality of cells; and to control timing for transmitting the downlink information to each of the plurality of cells by the base station in accordance with measured delays.
Abstract: A socket migration architecture for migrating a communication socket among host devices comprises a plurality of migrateable sockets each operating in conjunction with one of a plurality of applications on a plurality of host devices. Each of the applications may utilize a respective migrateable socket to establish peer-to-peer communications with at least one other application. Upon establishment of such communications, the migrateable sockets may form an association link between migrateable sockets operating on different host devices. When a first application and respective first migrateable socket are migrated from a first host device to a second host device, at least one association link established prior to the migration may be used to re-established peer-to-peer communications as part of the migration event.
Abstract: Efficient paging control is achieved in a communication system that selectively provides one of communication services implemented by integrating a plurality of communication systems. Before transmitting a downlink signal to a terminal, a gateway requests each of the communication systems to transmit a paging signal to the terminal. Receiving the paging signals transmitted from the communication systems, the terminal selects a communication system A with the lowest communication cost in accordance with communication cost information contained in the paging signal. The terminal sends a request for connection to the selected communication system A. As a result, the communication system A transmits the downlink signal to the terminal.
Abstract: An object is to provide a service providing method capable of curbing rise of cost A service providing method according to the present invention is one for providing services A and B, which authenticates a user of an authentication requesting terminal in order to make service A available to the user and which determines whether service B is available to the user, in a state in which the user is authenticated about service A. When service B is determined to be available, a permission message is stored and a permission response based on the permission message for utilization of service B is transmitted to the authentication requesting terminal. Then the permission message on which a utilization request message from a service utilizing terminal is based, is verified, and, if it is in an available status, the service utilizing terminal is permitted to utilize service B.
Abstract: A communication channel allocation method allocates a communication channel to communications between a mobile terminal device and a second radio base station using a second frequency band which is close to a first frequency band used by a first radio base station, by detecting a first distance between the second radio base station and the first radio base station, detecting a second distance between the second radio base station and the mobile terminal device when the first distance is less than a first threshold, and allocating a communication channel of a frequency far from the first frequency band in the second frequency band to the communications between the second radio base station and the mobile terminal device when the second distance is less than a second threshold.
Abstract: A signal encoding method according to the present invention is a signal encoding method of dividing a coding target signal as an object of coding into partition units and performing arithmetic coding based on probability-related information in the partition units, which comprises (1) a configuration information deriving step of analyzing the coding target signal in each of the partition units to derive as configuration information, information about an initial value of the probability-related information used for the arithmetic coding of the coding target signal in the partition unit in question; (2) a coding step of performing the arithmetic coding of the coding target signal in each of the partition units, based on the configuration information derived in the configuration information deriving step; and (3) a configuration information adding step of adding a header containing the configuration information to the arithmetic-coded signal in each of the partition units.
Abstract: Any one of a plurality of terminals sharing the same number determines whether or not to switch a transfer to any of the other terminals sharing the same number. If it determines that the transfer is to be switched, it authenticates one terminal among the other terminals sharing the same number, and then outputs a transfer switching request according to the authenticated terminal to a communication control station. The communication control station performs a transfer switching process concerning the authenticated terminal based on the transfer switching request outputted from the first terminal.
Abstract: A received-signal combining method of transmitting a signal, based on a signal having undergone error-correction coding and transmitted from a radio-transmitting station, to a receiving station from a plurality of radio-receiving stations, and generating a reception-information sequence based on the thus-transmitted signal by the receiving station, comprises the steps of: each radio-receiving station rendering error-correction decoding and error detection processing on the signal transmitted from the radio-transmitting station, and transmitting the error-correction-decoding result to the receiving station when no error is detected by the error detection processing; and the receiving station combining the received error-correction-decoding result according to a first algorithm when receiving the error-correction-decoding result from any radio-receiving station, and, thus, generating the reception-information sequence.
Type:
Grant
Filed:
February 22, 2001
Date of Patent:
July 5, 2005
Assignee:
NTT DoCoMo, Inc.
Inventors:
Atsushi Fujiwara, Shinzo Ohkubo, Hirohito Suda
Abstract: A packet transmission control apparatus which performs transmission control of packets to a plurality of mobile stations includes an acquirer configured to acquire an average transmission rate of packets to each of the mobile stations and a guaranteed transmission rate of the packets; and a scheduler configured to perform scheduling to transmit packets to a specific mobile station preferentially, when an average transmission rate of the packets to the specific mobile station approaches the guaranteed transmission rate.
Abstract: There are provided an interconnection agreement determining system, apparatus, and method capable of accurately determining whether the carrier to which an originating communication terminal subscribes and the carrier to which a receiving communication terminal subscribes have a short message interconnection agreement with each other, even if the receiving communication terminal uses number portability. When a location-area MSC 20 receives an SMS originating signal, an interrogating unit 21 sends an SRIforSM signal including the MSISDN of a receiving terminal 10b to an HLR 30. When the location-area MSC 20 receives an SRIforSMack signal from the HLR 30, a subscriber-identification-information obtaining unit 22 obtains an IMUI contained in the SRIforSMack. An on-origination carrier identifying unit 23 identifies from the IMUI the carrier to which the receiving terminal 10b subscribes.