摘要:
A method of performing cell search includes receiving a primary synchronization signal (PSS) comprising a primary synchronization code (PSC), acquiring an unique identity from the PSS, receiving a secondary synchronization signal (SSS) which is associated with a cell identity group, the SSS comprising two secondary synchronization codes (SSCs) and acquiring a cell identity which is defined by the unique identity within the cell identity group, wherein the two SSCs are respectively scrambled by using two different scrambling codes. Detection performance on synchronization signals can be improved, and cell search can be performed more reliably.
摘要:
A method of generating random access preambles includes receiving information on a source logical index and generating random access preambles in the order of increasing cyclic shift from root ZC sequences with the consecutive logical indexes from the beginning of the source logical index until a predetermined number of the random access preambles are found, wherein the consecutive logical indexes are mapped to root indexes of the root ZC sequences.
摘要:
The present invention provides a method and an apparatus for the transmission of control signal in a radio communication system. The method includes the steps of processing first control information on the basis of a first resource index to create a first control signal, processing second control information on the basis of a second resource index to create a second control signal, and transmitting the first control signal and the second control signal.
摘要:
A method for retransmitting packets in accordance with decoding failure or reliability is disclosed. A method for retransmitting packets from a transmitting side in accordance with information of a receiving side comprises changing an order of packet symbols mapped with subcarriers, if retransmission information representing decoding success or reliability for a specific codeword is received from the receiving side mapping the packet symbols with the subcarriers in accordance with the changed order; and transmitting a codeword generated in accordance with the mapped result to the receiving side. Thus, it is possible to improve packet decoding success probability of the receiving side during initial transmission or retransmission by controlling a type of transmission packets in accordance with feedback information of the receiving side.
摘要:
A method for communicating with a relay station is disclosed. The method for communicating with a relay station comprises transmitting resource allocation information of downlink traffic and uplink traffic from a base station to the relay; and transmitting the downlink traffic to the relay by encapsulating the downlink traffic in accordance with the resource allocation information and receiving encapsulated uplink traffic from the relay in accordance with the resource allocation information. It is possible to enable efficient communication through a relay using a minimum interface without deterioration of throughput even in the case that a base station does not know detailed attributes of a relay existing in a system. Also, it is possible to coordinate collision through a master relay in case of a system supporting multi-hop relays.
摘要:
A data transmission method and apparatus in a wireless communication system is provided. The data transmission method include dividing a multicast broadcast single frequency network (MBSFN) zone including a plurality of cells into at least one sub-zone including at least one cell, enabling a plurality of cells belonging to the MBSFN zone to transmit first multicast broadcast service (MBS) data, and enabling the cell belonging to the at least one sub-zone to transmit sub-zone data superposed with the first MBS data, wherein the sub-zone data is second MBS data.
摘要:
A method for uplink transmitting control information from a user equipment in a wireless communication system comprises selecting a specific point among a plurality of points distributed into a symbol space, corresponding to control information, the symbol space including a modulation dimension and a sequence dimension; mapping a signal corresponding to the specific point with a control channel including single carrier-frequency division multiple access (SC-FDMA) symbols; and transmitting the control channel. Preferably, the specific point belongs to the sequence dimension.
摘要:
A method of transmitting a wideband frame for a wideband system having backward compatibility with a narrowband system includes configuring a wideband carrier by using a set of base carriers, wherein a bandwidth of the base carriers corresponds to a bandwidth of the narrowband system and any one of center frequencies of the base carriers is the same as a center frequency of the narrowband system, and allocating all or some of guard subcarriers between the two adjacent base carriers to a traffic channel when a center frequency spacing between two adjacent base carriers is an integer multiple of a subcarrier spacing. Accordingly, the method can be used to support backward compatibility with the narrowband system. Further, the method can be equally used when the narrowband system co-exists with the wideband system in a guard band defined in a narrowband of a new system.
摘要:
A method of transmitting a reference signal in a wireless communication system includes generating a frequency-domain reference signal by performing discrete Fourier transform (DFT) on a time-domain reference signal, generating a transmit signal by performing inverse fast Fourier transform (IFFT) on the frequency-domain reference signal and transmitting the transmit signal.
摘要:
A method of performing cell search includes receiving a primary synchronization signal (PSS) comprising a primary synchronization code (PSC) and receiving a secondary synchronization signal (SSS) comprising a first secondary synchronization code (SSC) and a second SSC, wherein the SSS includes a first SSS and a second SSS, the first SSC and the second SSC are arranged in that order in the first SSS, and the second SSC and the first SSC are arranged in that order in the second SSS. Detection performance on synchronization signals can be improved, and cell search can be performed more reliably.