摘要:
A method and apparatus of transmitting an ACK/NACK signal for a hybrid automatic repeat request (HARQ) in a wireless communication system is provided. A first ACK/NACK resource index and a second ACK/NACK resource index based on resources used to transmit a downlink control channel is determined. An ACK/NACK signal for a downlink transport block is transmitted through a plurality of antennas using first ACK/NACK resources obtained from the first ACK/NACK resource index and second ACK/NACK resources obtained from the second ACK/NACK resource index. An HARQ ACK/NACK signal can be reliably transmitted through a plurality of antennas.
摘要:
A method of transmitting a sounding reference signal from a user equipment to a base station in a wireless communication system using a plurality of component carriers is disclosed. The present invention includes the steps of checking offset values of a plurality of the component carriers corresponding to a subframe having the sounding reference signal applied thereto from the base station and if the sounding reference signal is transmitted using a certain component carrier of a plurality of the component carriers, transmitting the sounding reference signal to the base station using the certain component carrier in a sub-frame corresponding to the offset value of the certain component carrier. Preferably, the present invention further includes the step of if the sounding reference signals are transmitted using at least two component carriers in the same subframe, transmitting the sounding reference signal having a longest transmission periodicity among the sounding reference signals only.
摘要:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a wireless communication system, said method comprising the steps of: checking the maximum transmission power (P_CC_MAX) for each component carrier of a plurality of component carriers, as well as the maximum transmission power (P_UE_MAX) of the terminal; calculating the transmission power for each channel to be simultaneously transmitted to a base station through one or more component carriers; independently adjusting the transmission power for each of the channels so as not to exceed the maximum transmission power (P_CC_MAX) and the maximum transmission power (P_UE_MAX); and transmitting a signal to the base station through the plurality of channels for which the transmission power is adjusted.
摘要:
The present invention relates to a radio communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a radio communication system, said method comprising the steps of determining the transmission power for both a first channel and a second channel independently from one another; reducing at least the transmission power of the first channel or the transmission power of the second channel in consideration of a channel priority when the sum of the transmission power of the first channel and the transmission power of the second channel exceeds a maximum transmission power, and transmitting signals at the same time to a base station through the first channel and the second channel.
摘要:
A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal.
摘要:
A method of transmitting signals from a transmitter of a wireless communication system comprises determining each transmission power of a first signal and a second signal; if the difference Y in transmission power between the first signal and the second signal exceeds a predetermined value X, adjusting at least one of the transmission powers of the first signal or the second signal so as not to allow the difference in adjusted transmission power to exceed the predetermined value; and simultaneously transmitting the first signal and the second signal to a receiver using the adjusted transmission power.
摘要:
The present invention provided a method and an apparatus for mapping radio resources in a wireless communication system. A terminal determines the size of an RBG (resource block group of a f basic band according to the number of RBs (resource blocks) within the basic band in the overall bands which include the fundamental band and an aggregated segment band. The size of an RBG of the aggregated segment band is determined on the basis of the size of the RBG of the basic band.
摘要:
A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to ND divided groups of the block interleaver, which are equal in number to the number (ND) of physical resource blocks to which one virtual resource block is mapped.
摘要:
Provided are a method and apparatus of performing a HARQ in a multiple carrier system. A receiver determines the size of a soft buffer to be used in an effective HARQ process on the basis of the maximum number of effective HARQ processes over a plurality of component carriers and stores the received transport block in the soft buffer. The present invention enables the performance of a HARQ in an efficient manner by using multiple carriers in the event the size of the soft buffer is limited.
摘要:
A method of transmitting a signal using code division multiplexing (CDM) in order to reduce the influence of channel estimation error in a multi-input multi-output antenna (MIMO) system using transmit diversity is disclosed. That is, the method of transmitting a signal by a transmitter using a plurality of antennas includes code division multiplexing input symbols using codes according to a predetermined spreading matrix, and transmitting the code division multiplexed symbols via the plurality of antennas according to an Alamouti scheme. At this time, the predetermined spreading matrix is set such that a first component and a second component configuring interference due to channel estimation error have orthogonal phases.