Patent application number | Description | Published |
20130077584 | METHOD FOR GENERATING RANDOM ACCESS SIGNAL OF MACHINE TYPE COMMUNICATION DEVICE USING NARROW BANDWIDTH - Disclosed are a method for generating a random access signal of a machine type communication (MTC) device using a narrow bandwidth, and an MTC device. The method generates a random access signal by allocating a position in a frequency domain of a random access signal dedicated to the MTC device, that is, a position of a frequency for transmission of a random access preamble, to a center position of a base station system bandwidth, or by shifting a center frequency of the MTC device to a position of a random access frequency allocated for a legacy LTE terminal by a base station. | 03-28-2013 |
20130135984 | APPARATUS AND METHOD FOR TRANSMITTING UPLINK DATA - Disclosed herein relates to a method of transmitting uplink data to increase multiplex capacity. The method includes allocating, by each of a plurality of machine type communication user equipment (MTC UE), position information within a single resource block (RB), which is used when transmitting uplink data, to the single RB, generating information about a demodulation reference signal (DMRS) used when demodulating the data received from the plurality of MTC UE, and transmitting the position information within the RB and the information about the DMRS to each of the plurality of MTC UE. | 05-30-2013 |
20130182680 | METHOD FOR MACHINE TYPE COMMUNICATION USER EQUIPMENT TO CONNECT TO EVOLVED NODE-B AND APPARATUS EMPLOYING THE SAME - Provided are a method for machine type communication (MTC) user equipment (UE) to connect to an evolved Node-B (eNB) in a random access procedure, and an apparatus employing the method. The method for MTC UE to connect to an eNB includes receiving, at the MTC UE, system information or a handover command from the eNB, transmitting, at the MTC UE, a random access preamble to the eNB, receiving, at the MTC UE, a random access response message from the eNB, and transmitting, at the MTC UE, a connection request message or a handover confirm message including information about a dedicated bandwidth of the MTC UE to the eNB such that the MTC UE can be allocated the dedicated bandwidth. Using this method, an eNB is notified of a dedicated bandwidth of MTC UE, and thus can effectively utilize radio resources. | 07-18-2013 |
20140376465 | TRANSMITTING AND RECEIVING APPARATUSES FOR FREQUENCY DIVISION MULTIPLE ACCESS - A transmitting apparatus may comprise a symbol mapper; a first DFT and a second DFT performing DFT spreading on symbols mapped in the symbol mapper; and a subcarrier mapper mapping symbols which are DFT-spread in the first DFT and the second DFT to subcarriers, wherein the first DFT performs DFT spreading on all resource blocks to be transmitted when a total size of the resource blocks to be transmitted is a size which can be processed by the first DFT, or the first DFT performs DFT spreading on as many resource blocks among the resource blocks to be transmitted as the first DFT can process and the second DFT performs DFT spreading on the rest of the resource blocks to be transmitted when a total size of the resource blocks to be transmitted is not a size which can be processed by the first DFT. | 12-25-2014 |
Patent application number | Description | Published |
20150085382 | WIDE-ANGLE PHOTOGRAPHIC LENS SYSTEM ENABLING CORRECTION OF DISTORTION - A wide-angle photographic lens system enabling correction of distortion composed of four lenses, in which a first lens, an iris, a second lens, a third lens and a fourth lens sequentially arranged along an optical axis from an object, wherein the first lens has weak refractivity, the second lens has positive refractivity, the third lens has strong positive refractivity, and the fourth lens has negative refractivity, wherein the lens system satisfies relations, |f1/f|>4, f3/f<1.5, and te/tc<0.5, wherein f1 is a focal length of the first lens, f is a total focal length of all the lenses, f3 is a focal length of the third lens, to is a lens thickness on an effective diameter of a rear surface of the third lens, and tc is a center thickness of the third lens. | 03-26-2015 |
20150085383 | WIDE-ANGLE PHOTOGRAPHIC LENS SYSTEM ENABLING CORRECTION OF DISTORTION - A wide-angle photographic lens system enabling correction of distortion composed of three lenses, in which a first lens, an iris, a second lens and a third lens sequentially arranged along an optical axis from an object, wherein the first lens has weak refractivity, the second lens has strong positive refractivity, and the third lens has negative refractivity, wherein the lens system satisfies relations, |f1/f|>2.8, f2/f<1, and te/tc<0.4, wherein f1 is a focal length of the first lens, f is a total focal length of all the lenses, f2 is a focal length of the second lens, te is a lens thickness on an effective diameter of a rear surface of the second lens, and tc is a center thickness of the second lens. | 03-26-2015 |