Patent application number | Description | Published |
20100128656 | SATELLITE, MOBILE TERMINAL, AND COMPLEMENTARY TERRESTRIAL COMPONENT IN OFDM BASED MULTI-BEAM SATELLITE SYSTEM REUSING THE SAME FREQUENCY BAND FOR ALL THE BEAMS, AND COMMUNICATION METHOD THEREOF - Provided is a communication method of a mobile terminal in an orthogonal frequency division multiplexing (OFDM) based multi-beam satellite system reusing the same frequency band for all the beams, the method including: receiving location information of the mobile terminal from a satellite to determine a location of the mobile terminal within multiple beams; determining a subcarrier group for a communication with the satellite according to the location of the mobile terminal within the multiple beams; and communicating with the satellite using the subcarrier group for the communication with the satellite. | 05-27-2010 |
20100135274 | HIERARCHICAL RANDOM ACCES METHOD FOR WIRELESS COMMUNICATION SYSTEM HAVING SIGNIFICANTLY LARGE CELL - Disclosed is a hierarchical random access method for a wireless communication system having a significantly large cell. According to the present invention, a length of a preamble sequence and a length of a reference slot may be designed based on a terminal having greatest capacity of adjusting a timing error arrived at a base station, and a slot length may be designed to be an integer multiple of the length of the reference slot depending on a timing error correction capacity, thereby enabling terminals to use various slot lengths. | 06-03-2010 |
20100157880 | METHOD OF ESTABLISHING UPLINK IN MOBILE SATELLITE COMMUNICATION SYSTEM - Provided is a method of establishing an uplink in a mobile satellite communication system, the method including: receiving a random uplink access signal from terminals included in a coverage of a satellite beam; estimating a location of each of the terminals; calculating an uplink transmission point in time when each of the terminals transmits an uplink signal, based on the estimated location of each of the terminals; transmitting, to each of the terminals, the calculated uplink transmission point in time; and receiving the uplink signal from each of the terminals at the calculated uplink transmission point in time. | 06-24-2010 |
20100304668 | COMMUNICATION METHOD IN MOBILE COMMUNICATION SYSTEM - The present invention relates to a communication method in a mobile communication system. An exemplary embodiment of the present invention provides a mobile satellite communication system having a complementary terrestrial component among various mobile communication systems. The mobile satellite communication system can simultaneously provide a communication service and a broadcasting service to a terminal according to integration between communication and broadcasting. Different signal transmission methods are used between the complementary terrestrial component and a satellite. Specifically, a time division duplex method and a frequency division duplex method are used together and resources are allocated. As a result, system throughput can be increased, and local broadcasting contents can be effectively transmitted to the terminal. | 12-02-2010 |
20110041043 | DIVERSITY METHOD USING ERROR CORRECTING CODE - Provided is a diversity method using an error correcting code. The diversity method includes: creating a mother code by start performing error correction coding on an input bit string to be coded; puncturing the created mother code and acquiring an error correcting code including systematic information and partial parity information; and space-time encoding the acquired error correcting code corresponding to each frequency. | 02-17-2011 |
20110044237 | METHOD AND APPARATUS FOR ALLOCATING TRAFFIC RESOURCES IN MULTI-BEAM SATELLITE COMMUNICATION SYSTEM - In a system where satellite communication using multi-beams is performed for each group including a plurality of beams, a required data transmission rate of each beam is detected for each group, more traffic resources are allocated to a beam having a higher required data transmission rate than other beams based on the detection result, and data traffic transmitted to each beam in the group is adaptively controlled. | 02-24-2011 |
20110053628 | SERVICE PROVIDING SYSTEM AND METHOD IN SATELLITE COMMUNICATION SYSTEM - A service providing method in a satellite communication system includes: confirming positions of terminals when the terminals existing within a service area and intended to receive a service is connected to a satellite base station or a complementary terrestrial component; confirming first terminals, which communicate with the satellite base station, and second terminals, which communicate with the complementary terrestrial component, according to the positions of the terminals; allocating resources usable when communicating with the first terminals and resources usable when communicating with the second terminals; and providing a service to the terminals by using the allocated resources through multi-beams of the satellite base station and multi-beams of the complementary terrestrial component. | 03-03-2011 |
20110149837 | METHOD FOR MOBILE SATELLITE COMMUNICATION BY COORDINATED MULTI-POINT TRANSMISSION AND APPARATUS THEREOF - Provided is mobile satellite communication method and apparatus. The satellite communication method includes detecting a location of a terminal, determining a signal transmission scheme for the terminal using the terminal location, determining a subcarrier region to transmit a signal to the terminal using the location of the terminal, and communicating with the terminal using the determined signal transmission scheme and the determined subcarrier region. | 06-23-2011 |
20110202951 | MULTIMEDIA TERMINAL DEVICE AND OPERATING METHOD THEREOF, AND PERSONAL PORTABLE DEVICE FOR PROVIDING WIRED/WIRELESS RETRANSMISSION SERVICE - A personal portable terminal and an operating method of a multimedia terminal device are provided, and more particularly, a multimedia terminal device, an operating method of the multimedia terminal device, and a personal portable terminal are provided. The multimedia terminal device may receive bidirectional content and additional service information corresponding to the bidirectional content, may classify the received additional service information from the received bidirectional content, and may transmit the classified additional service information to a personal portable terminal that is registered in advance and that is connected wired or wirelessly to the multimedia terminal device. | 08-18-2011 |
20120033599 | SATELLITE MOBILE COMMUNICATION SYSTEMS CONSIDERING EVOLUTION OF SATELLITE MOBILE COMMUNICATION SERVICES MARKET AND METHOD FOR COMMUNICATION USING THE SYSTEM - Disclosed is a communication method of a satellite mobile communication system. The communication method of a satellite mobile communication system, includes: receiving system information indicating frame intervals in which first user equipments using a satellite radio interface in commonality with a terrestrial radio interface do not perform communications from a base station; accessing the base station in the rest frame intervals other than frame intervals in which the first user equipments do not perform communications, based on the system information; transmitting the system information from the base station to second user equipments using a satellite radio interface optimized for satellite environment; and accessing the base station in the rest frame intervals based on the system information received in the second user equipments. | 02-09-2012 |
20120093014 | COMMUNICAITON METHOD AND APPARATUS USING SYMBOL INTERLEAVING - A communication method and apparatus using a symbol interleaver in a long term evolution (LTE)-based satellite communication system are provided. The communication method may include determining whether to use an interleaver based on service information, and interleaving the data using the symbol interleaver designed based on interleaver information. Also, the communication method may include generating random data using a timer and interleaving the random data. | 04-19-2012 |
20130070698 | METHOD FOR TRANSMITTING AND RECEIVING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - First resource blocks of a radio resource each include a first number of subcarriers and a second number of subframes having the first size. In this case, second resource blocks are formed, each second resource block including fewer subcarriers than the first number and fewer subframes than the second number based on the first resource blocks. A signal is transmitted in the first resource block or second resource block, and particularly, signals of first and second channels are transmitted by sharing the first resource block. | 03-21-2013 |
20130215861 | RANDOM ACCESS METHOD - According to the present invention, a random access method between a terminal and a base station comprises: a system information transmission step in which the base station transmits, to the terminal, system information including route values sequentially selected from among a set of routes; a random access preamble transmission step in which the terminal generates a random access preamble on the basis of the system information and transmits the generated random access preamble to the base station; a period setup step in which the base station sets a period available for an arrival of the random access preamble; and a random access preamble detection step in which the base station detects the random access preamble in said available period. | 08-22-2013 |
20140064411 | APPARATUS AND METHOD FOR RECEIVING DATA IN COMMUNICATION SYSTEM - Disclosed are an apparatus and a method for normally receiving data by accurately estimating and compensating for a frequency offset for a wireless frequency channel through which data are transmitted in a communication system under wireless frequency environment. In the present invention, data transmitted through the wireless frequency channel are received, the frequency offset in the wireless frequency channel from the receive data is estimated based on an interpolation scheme using the periodogram, and the frequency offset is compensated to receive the data by frequency-synchronizing with the wireless frequency channel. | 03-06-2014 |
20140133475 | SYSTEM AND METHOD FOR RANDOM ACCESS WIRELESS COMMUNICATION - A system and method for wireless communication that schedules a connection time of a terminal based on a delay time is provided. A base station of the system for wireless communication may include a delay time determiner to determine a delay time of a terminal, based on preamble information for a plurality of terminal groups based on location information of the terminal, and a scheduler to schedule a connection time for the terminal to connect to the base station, using the delay time. | 05-15-2014 |
20150063201 | METHOD OF FORMING BEAM AND ALLOCATING RESOURCE IN LTE-BASED COMMUNICATION SYSTEM - A method of forming a beam and a method of allocating a resource in a long term evolution (LTE)-based mobile communication system are provided. More particularly, a method of forming an adaptive satellite multiple beam for enhancing multiple beam performance and a method of allocating a resource that can relieve interference in a beam that is formed according to the method in a multiple beam system in which satellite communication and mobile communication is coupled based on LTE are provided. When providing a communication service that supports both satellite communication and ground communication, performance degradation can be reduced with the same interface, and by providing a method of forming an adaptive beam and a method of allocating a resource by relieving interference of the formed beam in consideration of a position of the terminal by independently allocating a subcarrier to the terminal and enabling the terminal to process the subcarrier, performance of a multiple beam can be improved. | 03-05-2015 |
20150063203 | METHOD OF DESIGNING AND COMMUNICATING BEAM IN COMMUNICATION SYSTEM - A method of designing and communicating a beam in a communication system is provided. More particularly, a method of designing and communicating a beam in a communication system using carrier aggregation in order to increase a maximum data rate in a multiple beam mobile communication system is provided. By applying carrier aggregation, a maximum data rate can be improved. | 03-05-2015 |
20150079977 | APPARATUS AND METHOD OF DYNAMICALLY MANAGING RESOURCES FOR INTERFERENCE CONTROL OF SATELLITE AND TERRESTRIAL INTEGRATED COMMUNICATION SYSTEM - An apparatus and method of dynamically managing resources for interference control of a satellite and terrestrial integrated communication system is disclosed, the apparatus including a frequency band determiner to determine a frequency band of a satellite beam and a frequency band of a wireless signal based on information on interference between the satellite beam and the wireless signal to which a frequency band identical to the satellite beam is allocated, and a remote controller to remotely control a space-based station to output a satellite beam at an intensity corresponding to a frequency band of a satellite beam, and an earth-based station to output a wireless signal at an intensity corresponding to a frequency band of a wireless signal. | 03-19-2015 |