摘要:
A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. A first and a last subframe each includes one of the plurality of first subframes.
摘要:
A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end.
摘要:
Provided are a method and an apparatus for performing random access in a wireless communication system. A terminal receives from a base station a physical downlink control channel (PDCCH) indication, which indicates an initiation of the random access with respect to a secondary cell (SCell), based on whether a cross-carrier scheduling is supported by the SCell; transmits a physical random access channel (PRACH) preamble to the base station through the SCell; and transmits a RACH response as a response to the PRACH preamble, based on whether the SCell supports the cross-carrier scheduling, wherein the SCell and a primary cell (PCell) comprises a carrier aggregation (CA) system, the PCell is a cell from which the terminal performs radio resource control (RRC) connection with the base station, and wherein the SCell is at least one cell from residual cells in the carrier aggregation excluding the PCell.
摘要:
A method for resource reservation in a wireless communication system is provided. A plurality of physical resource units (PRUs) is provided and a reserved region is reserved. The reserved region is greater than or equal to a frequency band size of a subband which is a unit of contiguous PRUs in a frequency domain among the plurality of PRUs.
摘要:
The present invention relates to a broadband wireless access system, and more particularly, to a frame structure to which OFDM symbols having a cyclic prefix are transmitted. A method of constructing a frame in a broadband wireless access system according to one embodiment of the present invention comprises including one or more first subframes in the frame, the first subframes including a plurality of symbols having a cyclic prefix of a first length; and including one or more second subframes in the frame, the second subframes including a plurality of symbols having a cyclic prefix of a second length different from the first length, wherein the number of the first subframes and the number of the second subframes are determined considering an idle time for which effective symbols are not included in the frame.
摘要:
A method and apparatus for controlling uplink transmit power in a wireless communication system are disclosed. The method includes determining an uplink transmit power for each of the plurality of transmission channels, and sequentially allocating the determined uplink transmit powers to the transmission channels in a descending order of predetermined priority levels of the transmission channels, within a maximum available transmit power of the user equipment. The priority levels of the transmission channels are predetermined so that control channels, a sounding channel, a data channel, and a bandwidth request channel have priority levels in a descending order.
摘要:
A frame transmission method in a wireless communication system comprises setting a primary frame including a multiplicity of primary sub-frames, setting a secondary frame including a multiplicity of secondary sub-frames, and transmitting the secondary frame, wherein each of the primary sub-frames and each of the secondary sub-frames consists of multiple OFDM symbols, the OFDM symbols included in the primary sub-frame and the OFDM symbols included in the secondary sub-frame have different CP (Cyclic Prefix) lengths from one another, and the primary sub-frames and the secondary sub-frames are all equal in length. It is an advantage of the invention that frames consisting of OFDM symbols with different CP lengths can coexist together. Moreover, when each of the sub-frames within one frame consists of multiple OFDM symbols with different CP lengths, even the sub-frames can coexist together.
摘要:
A device characteristic compensation circuit includes a device characteristic detection block configured to detect one or more of a frequency of a clock signal and characteristics of devices, and generate a control code signal according to a detection result; and an internal voltage regulation unit configured to regulate a level of an internal voltage in response to the control code signal and generate a corrected internal voltage.
摘要:
The present invention relates to a method for transmitting a synchronization channel for using a synchronization channel as a phase reference when decoding a broadcast channel, the method includes using a pre-decided shift value for each antenna, where the shift value is pre-decided with a user equipment, so as to apply circular shifts to sequences of the synchronization channel, and transmitting the sequences having the circular shifts applied thereto from a base station to the user equipment. In performing time/frequency domain synchronization in the synchronization channel, regardless of the number of transmission antennae used by the base station when transmitting signals, the synchronization process may be performed.
摘要:
A method for a base station to receive a reference signal sequence from one or more devices within a cell of the base station in a multiple cell environment includes providing the one or more devices with information about the reference signal sequence, wherein the reference signal sequence is defined by a cyclic shift of a base sequence, wherein the base sequence is one of a plurality of base sequences divided into groups, wherein each of the groups comprises at least one base sequence for each length (N), wherein each length (N) corresponds to (12*n), (n) being a positive integer, and receiving the reference signal sequence from one or more of the one or more devices.