66results about How to "Efficient data communication" patented technology

A broadband wireless access communication system in which a subscriber station (SS) sends a serving base station (SBS) a handover request to neighbor base stations (NBSs) having a CINR satisfying a handover condition, in response to a handover scan request message, and performs the handover to a particular NBS that transmits a handover response. The SBS transmits the handover scan request message to the SS, sends a handover connection request to NBSs in an order determined by CINRs reported from the SS, and sends, to the SS, information on a particular NBS upon receiving a handover connection response with ACK information from the particular NBS. The particular NBS determines whether it can support handover of the SS, in response to the handover connection request, and sends the handover connection response with the ACK information to the SBS, if it can support handover of the SS.

Systems and methods for conducting a multi-endpoint video signal conference are provided. Conferencing endpoints are linked by pairs of a reliable and a less reliable communication channel. Conference video signals are scaleable coded in base layer and enhancement layers format. Video signal base layers, which correspond to a minimum picture quality, are communicated over reliable channels. The video signal enhancements layers may be communicated over the less reliable channels. A conference server mediates the switching of video layer information from transmitting endpoints to receiving endpoints without any intermediate coding or re-coding operations. The video conference can be integrated with an audio conference using either scalable coded audio signals or non-scaleable coded audio signals.

In order to realize low power consumption of a communicator and information transmission in short packets with a short latency in a network environment of a self-organized distribution type, each communication station performs a reception processing before and after a beacon transmission time of a next communication station which transmits a beacon next to a local station, and performs data transmission before and after a beacon transmission time of a communication station functioning as a data transmission destination. In a case where a certain communication station transmits information to all other communication stations, each communication station transmits information by utilizing a reception period provided after the beacon transmission time of the next communication station transmitting the beacon next to the local station to perform transmission according to a bucket-brigade system.

A mobile communication system in which, when transmission is performed from a base station to a terminal device, a modulation scheme is designated, from among at least two modulation schemes with different modulation levels, on the basis of reception quality at the terminal to perform transmission from the base station. The system includes a base station transmitting at a first transmission power using a frequency designed for, in a channel allocation scheme of the system, not causing interference with an adjacent base station and using a first modulation scheme, and a second channel transmitting at a second transmission power lower than the first transmission power, and when the base station uses the second channel, a second modulation scheme having a lower modulation level than the first modulation scheme is designated, and communication is performed.

Provided are a method and apparatus for transmitting data in a wireless communication system. The method comprises the steps of: setting up a frame including both a control domain for transmitting scheduling information to a first terminal and a data domain for transmitting first data to the first terminal; and transmitting, to a second terminal, second data in the control domain. The frame comprises a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain. The control domain consists of a first number N (where N is any natural number equal to or less than 4) of OFDM symbols in the frame. The data domain consists of OFDM symbols other than a number N of OFDM symbols in the frame. The second data has a predetermined bit size.

A method and system for efficient extended data communications using a GPRS (General Packet Radio Service) carrier network. In a communications system having a server and client device coupled by a GPRS network, a communication session is initiated by the client. A combination of data packet transmission frequency adjustment and the transmission of “keep alive” packets are used to prevent carrier network time-out of the communication session. In multiple server environments such as those using load sharing, a queuing mechanism is provided for outbound messages to client devices.

Provided is a method and apparatus for decoding data by a user equipment (UE) in a wireless communication system. The method comprises the following steps: receiving group control information identified by a group identifier (ID) allocated to a plurality of UEs including the UE, wherein the group control information includes scheduling information indicating a group search space that is a wireless resource area through which data for the plurality of UEs can be transmitted; receiving data through the group search space; and decoding the data on the basis of a unique ID of the UE in the group search space.

A map data transmitting server is interconnected with a vehicle terminal through a wireless network. The vehicle terminal determines a range of cells of which cell data are required for navigation based on vehicle state information, and requests the map data transmitting server to transmit the cell data of the cells thereto.

A method and system for communicating signal data in GNSS system using LDPC convolution codes. The method involves, at transmitting end, formatting signal data into a set of subframes. Each subframe of the signal data can be encoded in accordance with a parity check matrix defining Tanner graph representation of LDPC convolution codes. The encoded signal data can be interleaved and added with a Sync word field to transmit an interleaved block of encoded signal data through a communication channel. At receiving end, the interleaved block of encoded signal data can be de-interleaved after it is received from the communication channel. The Tanner Graph shows the connectivity in time invariant parity check matrix. A message passing technique is used to decode the LDPCCC encoded message. The encoded signal data can be decoded through the message passing technique to obtain the signal data primitively transmitted at the transmitting end. Such method and system are capable of achieving error free performance over the GNSS communication channel for effective navigation data communication, and also provide good BER performance over a wide range of Signal-to-Noise ratios.

A transmitter device 20, in transmitting a predetermined number of data blocks out of a plurality of data blocks to a receiver device 10 via a relay device 40, divides and writes into data blocks transmitted in succession, a request code for requesting relay device 40 to relay remaining data blocks. Relay device 40, in the case of accepting the request shown in the request code that is divided and written in the data blocks transmitted from transmitter device 20, notifies the acceptance of the request to transmitter device 20. Transmitter device 20, upon receiving the notification, then transmits the remaining data blocks in succession to relay device 40.

In a gateway device for carrying out a data relaying at a transport or upper layer between a first terminal device and a second terminal device which are capable of carrying out communications through networks, information regarding a security association set up between the first terminal device and the second terminal device in order to carry out communications with guaranteed data secrecy or in order to carry out communications with guaranteed data authenticity managed, and the decryption / encryption processing or the authentication processing is carried out according to the managed information regarding the security association along with the data relaying at the transport or upper layer.

An information processing system comprising a communication terminal and an information processing device that allow communication therebetween. The communication terminal includes: a remote controlling part for acquiring an operation screen image, with which the user makes remote operation of the information processing device; and a cloud service connecting part for connecting to a service providing server providing a cloud service over a network, and acquiring a display screen image for using the cloud service from the service providing server in response to user's instruction, thereby causing the acquired display screen image to be displayed on the display part together with the operation screen image. The remote controlling part sends connecting information for connecting to the service providing server to the information processing device. The remote controlling part switches the display screen image displayed by the cloud service connecting part to the display screen image acquired by the information processing device.

Provided is a user-interest driven launching pad of a mobile application and method of operating the same. The user-interest driven launching pad inputs metadata of data elements related to a mobile device, forms a set of data elements having the same metadata, marks the set of data elements with user-interest reflecting tags, and executes the mobile application relating to the set of data elements.

A method of transmitting data in a wireless access system and a packet retransmitting method therein are disclosed. The present invention includes receiving an initial control message including information required for a packet retransmission from a base station, transmitting the packet to be provided with a service from the base station, and if a NACK (non-acknowledgement) signal is received from the base station, retransmitting the packet corresponding to the NACK signal to the base station using the information required for the packet retransmission and included in the initial control message. Therefore, since a separate control message needs not to be transmitted in case of packet retransmission,.it is able to save radio resources and reduce an overhead by retransmitting a packet via a previously allocated retransmission region without the separate control message.

The invention relates to a network shooting range soft and hard combination model construction method under cloud architecture, and relates to the technical field of information safety. According to the invention, the VXLAN subnet is constructed based on the OpenStack cloud platform, and the virtual device network and the physical device network are isolated from each other. By establishing the central network node, the physical equipment and the virtual equipment carry out information interaction through the central network node by virtue of a software-defined network technology, so that soft and hard combination is realized, the network shooting range can efficiently carry out data communication with external physical equipment, and the practicability of the network shooting range is improved. According to the method, the expansion of a two-layer network is realized in a three-layer network by virtue of a VXLAN technology, a subnet is established based on the VXLAN, and data flooding between an external network and an internal network is effectively isolated, so that the network flow flooding is reduced, and the network transmission efficiency and the safety of a network shooting range are improved.

A transmitter device 20, in transmitting a predetermined number of data blocks out of a plurality of data blocks to a receiver device 10 via a relay device 40, divides and writes into data blocks transmitted in succession, a request code for requesting relay device 40 to relay remaining data blocks. Relay device 40, in the case of accepting the request shown in the request code that is divided and written in the data blocks transmitted from transmitter device 20, notifies the acceptance of the request to transmitter device 20. Transmitter device 20, upon receiving the notification, then transmits the remaining data blocks in succession to relay device 40.

A method for paging in a wireless access system is disclosed. A method for paging a mobile station of an idle mode comprises allocating large paging group identifier and small paging group identifier of a paging group to which the mobile station belongs to a header; allocating a large paging group flag and a small paging group flag to the header, the large paging group flag and the small paging group flag indicating the presence of a paging message for the mobile station; and transmitting the header to the mobile station of the idle mode.

In order to realize low power consumption of a communicator and information transmission in short packets with a short latency in a network environment of a self-organized distribution type, each communication station performs a reception processing before and after a beacon transmission time of a next communication station which transmits a beacon next to a local station, and performs data transmission before and after a beacon transmission time of a communication station functioning as a data transmission destination. In a case where a certain communication station transmits information to all other communication stations, each communication station transmits information by utilizing a reception period provided after the beacon transmission time of the next communication station transmitting the beacon next to the local station to perform transmission according to a bucket-brigade system.

A system of frequency allocation for a user access local area network, and uplink and downlink transmission methods thereof are provided. The system of frequency allocation for a user access local area network comprises: an information processing apparatus, a switch, a plurality of first modulators, a broadband high frequency synthesizer, a downlink amplifier, a plurality of trunk splitters, a plurality of branch splitters, a plurality of user terminal digital high frequency demodulators, a plurality of user terminal modulators, a plurality of trunk mixers, a plurality of branch mixers, an uplink amplifier, a broadband high frequency allocator and a plurality of first demodulators. The present invention uses a new communication resource configuration technology with high transparency in which every user is provided with his dedicated communication channel regardless of its busy / idle status. In addition, the present invention adopts a new physical layout construction of the user access LAN with a high frequency broadband, a high speed, and a large capacity in which passive operations without relay amplification can be achieved in the main trunk. Therefore, the seamless communication resource utilization is achieved, and the operation and communication service technology is provided which is suitable to the operation custom of the public so as to be easily learned and propagation.

The present invention relates to a method for transmitting an aggregate MPDU and a response frame thereto and a wireless communication terminal using the same, and more particularly, to a wireless communication method and a wireless communication terminal for setting various formats of the aggregate MPDU and the response frame thereto and performing an efficient data communication by using the same. To this end, provided are a wireless communication terminal including: a processor; and a communication unit, wherein the processor receives an aggregate MPDU (A-MPDU) consisting of one or more MAC protocol data units (MPDUs), determines a format of a response frame for the received A-MPDU, andtransmits a response frame of the determined format, wherein the format of the response frame for the A-MPDU is determined based on at least one of the number of traffic IDs (TIDs) soliciting an immediate response in MPDU(s) successfully received in the A-MPDU and MPDU delimiter information of the A-MPDU and a wireless communication method using the same.

A reader / writer transmitting and receiving data, through wireless communications, to and from a passive type wireless tag having a nonvolatile storage unit, includes a tag selection unit selecting a target wireless tag performing the wireless communications with the reader / writer, a data transmitting / receiving unit executing data transmission / reception between the selected target wireless tag and the reader / writer, and a time information writing unit writing, when completing the data transmission / reception by the data transmitting / receiving unit, the time information on completion time of the data transmission / reception to the nonvolatile storage unit, wherein the tag selection unit selects the target wireless tag from within one or the plurality of wireless tags on the basis of the time information already written by the time information writing unit through the previous data communications with the reader / writer.

The invention discloses a data communication method and device, equipment and a storage medium, and the method comprises the steps: obtaining to-be-communicated target data, and randomly generating a first encrypted data group comprising a first secret key; performing asymmetric encryption algorithm encryption on the first encrypted data set according to the first public key to obtain a second encrypted data set, the second encrypted data set comprising a salt value; performing symmetric encryption algorithm encryption on the target data according to the first encrypted data group to obtain ciphertext data; according to the second private key, the first secret key, the salt value and the ciphertext data, generating to-be-signed data, and encrypting the to-be-signed data to obtain signature data; and uploading the first key, the salt value, the ciphertext data and the signature data to a server. According to the method and the device, the non-repudiation of the data sender is ensured through the signature data, so that the legality of both communication parties is ensured, the data is prevented from being tampered, the replay attack is prevented, and the data communication can be performed more safely and efficiently on the basis of not reducing the encryption performance.

Systems and methods which facilitate access to computing resources by cloud-based applications are described. Embodiments enable cloud-based applications to provide output to and / or obtain input from computing resources, such as printers, scales, scanners, and storage devices, for performing various functions. In operation according to embodiments, a user agent client application is executed by computing equipment in communication with a computing resource to which access is to be provided to one or more cloud-based applications. Although embodiments implement a user interface client application which is separate from a user agent client application, tight integration between a user interface client application and user agent client application may be provided. Embodiments not only facilitate operation whereby a cloud-based application is enabled to provide output to and / or obtain input from computing resources, but also facilitate remote and / or shared client interaction with such computing resources.