Abstract:
A relay method of a wireless communication system according to one embodiment of the present invention relates to a relay method of a wireless communication system in which at least one relay device communicates with a base station. The relay method comprises the steps of: each relay device setting information about a frequency band to be relayed, composing a control signal including the information about the set frequency band, and transmitting the control signal to at least one relay device; and receiving the control signal, extracting the information about the frequency band included in the control signal, amplifying the signal according to the information about the frequency band set in each relay device, and transmitting the amplified signal to at least one terminal.
Abstract:
A method for managing neighbor cell interference comprises: a step of measuring inter-cell interference control information by subframe units; and a step of transmitting the inter-cell interference control information measured by subframe units, to at least one neighbor cell for each of the subframes. The interference management method of the present invention dynamically performs neighbor cell interference management under the condition where neighbor cell interference changes in terms of time, thus improving performance of a system. Further, the interference management method of the present invention maps a wireless resource property pattern to a cell ID. Consequently, the system adopting the method of the present invention exhibits excellent performance in any environment.
Abstract:
Provided is a method for inter-cell interference management in a cellular system. The method comprising the steps of dividing radio resources into multiple radio resource groups; generating multiple radio resource property patterns, e.g. using a mutually orthogonal Latin square matrix, thereby, the radio resource property used for the radio resource property pattern may include a maximum transmission power of the radio resource or an allowable inter-cell interference level; mapping the radio resource property pattern to cell IDs; and using, by each cell, radio resources according to a radio resource property pattern mapped to a cell ID of each cell. Thereby, a method for inter-cell interference avoidance is provided that may not require signaling between base stations and complex cell planning.
Abstract:
Disclosed is a data transmission system that transmits data by using relay. The relay may select a transmission terminal from among a plurality of terminals accessing a base station. The base station may transmit base station data to the relay during a first time slot, the transmission terminal may transmit terminal data to the relay. The relay may transmit the terminal data to the base station and may transmit the base station data to the transmission terminal during a second time slot.
Abstract:
Disclosed are a data transmission/reception apparatus and method of a wireless communication system using a relay. The data transmission/reception apparatus of the relay sets a relay reception subframe (hereinafter, referred to as 'relay-rx-subframe'), and reports, to a terminal within a cell coverage, that the set relay-rx-subframe is a Multicast Broadcast Single Frequency Network (MBSFN) subframe, so that a legacy terminal may be provided with services in a wireless communication system using the relay.
Abstract:
Provided is a data transmission system using a carrier aggregation. The data transmission system may assign a radio resource based on a correspondence relationship between a downlink and an uplink, and may transmit data using the assigned radio 5 resource.
Abstract:
Disclosed is a frequency hopping method in an OFDM system, comprising: (a) detecting a mutual interference degree between different cells, and determining whether to use different frequency hopping patterns between the cells for interference averaging according to the mutual interference degree interference degree; (b) determining a number P of the different frequency hopping patterns needed between all the cells in the system; (c) generating the frequency hopping patterns of more than the number P and allocating the generated frequency hopping patterns to each cell, the frequency hopping patterns having the same frequency collision times between two channels in the different frequency hopping patterns; and (d) frequency-hopping the channels in each cell according to the allocated frequency hopping pattern.
Abstract:
Disclosed is a frequency hopping method in an OFDM system, comprising: (a) detecting a mutual interference degree between different cells, and determining whether to use different frequency hopping patterns between the cells for interference averaging according to the mutual interference degree interference degree; (b) determining a number P of the different frequency hopping patterns needed between all the cells in the system; (c) generating the frequency hopping patterns of more than the number P and allocating the generated frequency hopping patterns to each cell, the frequency hopping patterns having the same frequency collision times between two channels in the different frequency hopping patterns; and (d) frequency-hopping the channels in each cell according to the allocated frequency hopping pattern.
Abstract:
Abstract Disclosed is a data transmission system using carrier aggregation. The data transmission system can assign radio resources using a corresponding relationship between downlink and uplink, and transmit data using the assigned radio resources.