Patent application number | Description | Published |
20090268670 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND PACKET DATA IN DOWNLINK - Provided are a method and apparatus for transmitting control information and packet data. The method includes generating control channels which transmit the control information; generating control indication channel which indicates whether the control channels are transmitted or not; generating data channels in order to transmit the packet data based on the control information; multiplexing the control channels, the control indication channels, and the data channels; and transmitting the control channels, the control indication channels, and the data channels. According to the present invention, when control information and packet data are transmitted in downlink, by transmitting additional information indicating whether control channels are transmitted or not, resources not actually allocated to control channels can be allocated to data channel and the mobile station can receive data channel using the control indication information. | 10-29-2009 |
20100067500 | METHOD AND APPARATUS FOR CREATING COMMON PHYSICAL CHANNEL - The present invention relates to a common channel generating method and device in a downlink. Receiving performance by the mobile station is improved by efficiently allocating the resource and generating the common channel in the downlink. Also, transmission diversity applied to the number of transmit antennas of the base station and the common channel can be easily detected, thereby acquiring the mobile station's initial process. | 03-18-2010 |
20100158053 | DERATE MATCHING METHOD AND APPARATUS - Provided are a method and apparatus for derate matching a rate-matched data. The received data is deinterleaved and derate matched at a time, without using input buffers or constructing input buffers in parallel. Thus, a total process time necessary for the deinterleaving process and the derate matching process is reduced, and the use of memories such as the input buffers is minimized. | 06-24-2010 |
20100158167 | AUTO GAIN CONTROL METHOD IN DIGITAL COMMUNICATION SYSTEM - Provided is an auto gain control method in a digital communication system. The auto gain control method checks a distribution of a signal and a distribution of a signal envelope during a regular check interval, and determines a state of a current gain value from the distribution of the signal and the distribution of the signal envelope which are obtained through the checking of the distribution. The auto gain control method controls a gain value for auto gain control according to the determined state of the current gain value. | 06-24-2010 |
20100278277 | DECODING APPARATUS AND METHOD USING ORTHOGONAL SPACE-TIME BLOCK CODES ROBUST TIMING ERRORS - Provided is a decoding apparatus and method using orthogonal space-time block codes (OSTBCs) robust against timing errors. The decoding apparatus may include: a cyclic prefix removal unit to receive a signal, and to remove a cyclic prefix in the signal; an inverse discrete Fourier transform (IDFT) unit to apply an IDFT to the signal with the removed cyclic prefix; a guard band removal unit to remove a guard band in the inverse discrete Fourier transformed signal, and to generate a complex matrix; a channel estimation unit to transmit a carrier corresponding to the complex matrix and channel status information associated with transmit and receive antennas; and a decoder to calculate a channel status vector with respect to a complex symbol included in the complex matrix, using the channel status information, and to calculate an inner product between the channel status vector and the complex matrix, to restore the complex symbol. | 11-04-2010 |
20110074632 | WIRELESS POSITIONING METHOD AND APPARATUS - A wireless positioning method of a receiver is provided. Signals are received from a plurality of transmitters, propagation taps of the plurality of transmitters received from the plurality of transmitters are determined, respectively, the distance between the receiver and each of the transmitters is calculated, respectively, the weight of each of the transmitters is calculated by using each of the propagation delay tap, the distance is adjusted by using the weight of each of the transmitters, and an area, in which circles away by the adjusted distances between the receiver and each of the transmitters on the basis of each of the transmitters overlap with each other, is estimated as the location of the receiver. Thus, an error of wireless positioning according to a propagation environment can be reduced. | 03-31-2011 |
20110074634 | WIRELESS POSITIONING METHOD AND APPARATUS - A wireless positioning method of a receiver is provided. Signals are received from a plurality of transmitters, propagation taps of the plurality of transmitters received from the plurality of transmitters are determined, respectively, the distance between the receiver and each of the transmitters is calculated, respectively, the distances are corrected by using propagation delay taps of the respective transmitters to determine final distances between the receiver and each of the transmitters, and an area, in which circles away by the final distances between the receiver and each of the transmitters on the basis of the center of each of the transmitters overlap with each other, is estimated as the location of the receiver. Thus, an error of wireless positioning according to a propagation environment can be reduced. | 03-31-2011 |
20110074635 | METHOD AND APPARATUS FOR POSITIONING - Provides are method and apparatus for wireless positioning. An exemplary embodiment of the present invention provides a method for wireless positioning, which includes: receiving signals from a plurality of transmitters; determining propagation delay tabs of the plurality of transmitters, from the signals received from the plurality of transmitters, respectively; setting the order of the plurality of transmitters in accordance with the propagation delay tabs; measuring distances between a receiver and the transmitter, respectively; and estimating the position of the receiver, by using the order and the measured distance. | 03-31-2011 |
20110286500 | SYNCHRONIZATION DEVICE AND METHOD OF RADIO-FREQUENCY REPEATER - A synchronization method of a radio repeater includes: using a first signal, a second signal, and a received signal including the first signal and the second signal to calculate correlation values of the first signal and the second signal; using the first signal correlation value, the second signal correlation value, and the power value of the received signal to output normalized correlation values; subtracting the normalized correlation value of the first signal and the normalized correlation value of the second signal; and detecting a start interval of the second signal based on the subtraction result and outputting a synchronization signal to synchronize the radio repeater. | 11-24-2011 |
20130231150 | APPARATUS AND METHOD FOR SHF/EHF BAND WIRELESS TRANSMISSION ON MULTI-LEVEL CELL CONFIGURATION - Provided is an apparatus for super high frequency (SHF)/extremely high frequency (EHF) band wireless transmission on a multi-level configuration. The apparatus may include a list managing unit to receive and manage a first list associated with an SHF/EHF band signal from a terminal connected to a wireless network, a path finding unit to select a path having a communication quality value greater than or equal to a first threshold value by referring to the first list, and a scheduling unit to schedule available SHF/EHF band radio resources for the selected path. | 09-05-2013 |
20140087744 | LINK ADAPTATION TRANSMISSION AND RECEPTION METHOD IN DEVICE-TO-DEVICE COMMUNICATION BASED CELLULAR MOBILE COMMUNICATION SYSTEM - Provided is a link adaptation transmission and reception method in device-to-device (D2D) communication based on cellular mobile communication. An operation method of a terminal in the link adaptation method according to the present invention includes receiving information related to a first transmission through a D2D link, performing transmission for an opposite terminal using the information related to the first transmission, and determining information related to a second transmission after the transmission based on reception from the opposite terminal. Using the link adaptation method according to the present invention, an adaptive modulation and coding scheme may be provided at the time of data transmission on a D2D link while minimizing control of a base station, thereby reducing the complexity of a cellular network due to the D2D communication. | 03-27-2014 |
20140119306 | DEVICE-TO-DEVICE COMMUNICATION METHOD AND MOBILE DEVICE USING THE SAME - There are provided a device-to-device communication method, a mobile device using the same, and a device-to-device communication control method. The device-to-device communication method according to the invention may include receiving device-to-device communication resource allocation information and transmission characteristics information for device-to-device communication from a base station, and performing direct communication with an opposite terminal using the transmission characteristics information for device-to-device communication and the device-to-device communication resource allocation information, in which the transmission characteristics information includes the number of redundancy versions to be transmitted within at least one consecutive transmission time interval (TTI). | 05-01-2014 |
20140162633 | METHOD OF PROVIDING SERVICE CONTINUITY BETWEEN CELLULAR COMMUNICATION AND DEVICE-TO-DEVICE COMMUNICATION - A method of providing service continuity between cellular communication and device-to-device communication is disclosed. A procedure for switching between cellular communication and device-to-device communication according to an example embodiment of the present invention may include transferring, by a gateway, a D2D bearer creation request message to an MME, transferring, by the MME, the D2D bearer creation request message to a base station, mapping, by the base station, D2D bearer QoS to D2D radio bearer QoS and transmitting an RRC connection reconfiguration message to terminals, receiving, by the base station, an RRC connection reconfiguration completion message indicating creation of a D2D radio bearer from the terminals, transmitting, by the base station, a D2D bearer creation response message indicating creation of a D2D bearer to the MME, and transferring, by the MME, the D2D bearer creation response message to the gateway. | 06-12-2014 |
20140194115 | METHOD FOR DISCOVERY IN DEVICE-TO-DEVICE COMMUNICATIONS AND APPARATUS FOR THE SAME - A method for discovery in device-to-device communications and an apparatus for the same are disclosed. The method performed in a device-to-device server supporting device-to-device discovery between a discovery terminal and a discoverable terminal may include receiving a device-to-device discovery participation message from the discoverable terminal, requesting a gateway to measure a proximity between the discovery terminal and the discoverable terminal, receiving a proximity measurement result from the gateway, and requesting the discovery terminal and the discoverable terminal to initiate a procedure of device-to-device discovery when the proximity measurement result satisfies a predetermined threshold. Thus, the procedure of device-to-device discovery may be performed efficiently. | 07-10-2014 |
20140304081 | ADVERTISING SERVICE METHOD USING DEVICE-TO-DEVICE COMMUNICATION AND APPARATUS FOR PERFORMING THE SAME - Disclosed is an advertising service method using D2D communication for efficiently using limited radio resources and control channel resources. The advertising service method includes setting a D2D common bearer with a network, receiving advertising terminal information from at least one other advertising terminal through the D2D common bearer, registering the advertising terminal in the network, transmitting advertising information to the at least one other advertising terminal and a user terminal through the D2D common bearer, and setting a user terminal and a D2D dedicated bearer on the basis of information received from the network. Accordingly, an advertisement can be easily transmitted to a plurality of user terminals which were not previously connected, and a collision between advertising terminals which are located in plurality in a specific area and transmit advertisements can be avoided. | 10-09-2014 |
20150071256 | METHOD FOR SETTING SYNCHRONIZATION BETWEEN DEVICE-TO-DEVICE COMMUNICATION TERMINALS BASED ON CELLULAR COMMUNICATION SYSTEM - A method for setting synchronization between terminals performing device-to-device (D | 03-12-2015 |