Abstract:
Embodiments of the present invention provide a data transmission method and system, a base station, and a user equipment (UE). The method includes: obtaining, by a base station, a second number of physical resource blocks (PRBs) according to a first number of PRBs, where the second number of PRBs is smaller than the first number of PRBs, and the first number of PRBs is exactly divisible by the second number of PRBs; sending, by the base station, indication information to a UE, where the indication information is used to indicate the second number of PRBs or an encoded bit repetition multiple, and the encoded bit repetition multiple is equal to the first number of PRBs divided by the second number of PRBs; and obtaining, by the UE, the encoded bit repetition multiple according to the indication information, and performing data transmission according to the encoded bit repetition multiple.
Abstract:
System, apparatus, and method embodiments are provided for detecting the presence of a pedestrian in an image. In an embodiment, a method for determining whether a person is present in an image includes receiving a plurality of images, wherein each image comprises a plurality of pixels and determining a modified center symmetric local binary pattern (MS-LBP) for the plurality of pixels for each image, wherein the MS-LBP is calculated on a gradient magnitude map without using an interpolation process, and wherein a value for each pixel is a gradient magnitude.
Abstract:
A precoding processing method and user equipment are disclosed. The precoding processing method includes: selecting a codebook vector for performing precoding processing for data among a codebook set of Nt antennas, where the codebook set includes a first codebook vector [ A B ] of a uniform linear array and a second codebook vector [ A - B ] generated according to the first codebook vector, where A is a (Nt/2)×1 vector composed of a first half of elements of the first codebook vector, B is a (Nt/2)×1 vector composed of a last half of elements of the first codebook vector, and Nt is a positive even number; and sending an index number of the codebook vector to a base station, whereupon the base station uses the codebook vector corresponding to the index number to perform precoding processing for the data to be transmitted by the antennas. Embodiments of the present invention make the codebook set compatible with two types of antenna configuration modes.
Abstract:
The present invention relates to the field of communications technologies, and discloses a retransmission method and apparatus, and a communication system. The method includes: after sending two channel-coded codewords in initial transmission, receiving a retransmission indication, where the retransmission indication includes an identifier of one channel-coded codeword to be retransmitted; according to a preset phase of each symbol, determining a precoding matrix of each symbol of the one channel-coded codeword to be retransmitted, where a phase relationship of each symbol is fixed; and after coding, by using the precoding matrix, each symbol of the one channel-coded codeword to be retransmitted, transmitting the coded symbol through an antenna. Through the present invention, a guarantee can be provided for retransmission success of a UE.
Abstract:
Embodiments provide a method for generating a random access channel ZC sequence, and an apparatus. A method for generating a random access channel ZC sequence includes: generating, by a base station, notification signaling, where the notification signaling instructs user equipment (UE) to generate a random access ZC sequence by using a second restricted set in a random access set; and sending, by the base station, the notification signaling to the UE, so that the UE generates the random access ZC sequence by using the second restricted set, where the random access set includes an unrestricted set, a first restricted set, and the second restricted set; and the second restricted set is a random access set that the UE needs to use when a Doppler frequency shift of the UE is greater than or equal to a first predetermined value.
Abstract:
The present disclosure discloses a physical downlink control channel (PDCCH) candidate determining method and device, and relates to the field of wireless communications. The method includes: determining a PDCCH resource set p in a subframe k, where the PDCCH resource set p includes NECCE,p,k=q×r control channel elements (CCEs), a PDCCH candidate of an EPDCCH with an aggregation level being L corresponds to L CCEs having consecutive reference numerals, and the PDCCH candidate is capable of carrying a PDCCH; and determining the number of PDCCH candidates at the aggregation level L of a carrier corresponding to an index Cellindex and an CCE corresponding to each PDCCH candidate, where the CCE corresponding to each PDCCH candidate at the aggregation level L is related to the index Cellindex.
Abstract:
Embodiments provide a data transmission method and an apparatus. The method includes: determining, by a terminal device from the initial transmission resource block set by means of contention, an initial transmission resource block used by the terminal device to initially transmit to-be-transmitted data, and initially transmitting the to-be-transmitted data by using the initial transmission resource block; receiving, by the terminal device, a negative acknowledgement that is sent by the network device and that is for the to-be-transmitted data; determining, by the terminal device from the retransmission resource block set, a retransmission resource block used to retransmit the to-be-transmitted data; and retransmitting, by the terminal device, the to-be-transmitted data by using the retransmission resource block.
Abstract:
Embodiments of the present invention provide methods for transmitting and receiving a control channel, a base station, and a user equipment, which relate to the communication field, and can solve a transmission problem of available changing transmission resources caused by introduction of an E-PDCCH. A method for configuring a control channel resource includes: determining, by a base station according to a system configuration and/or user configuration, resource elements REs included in an extended control channel element E-CCE, and transmitting an extended physical downlink control channel E-PDCCH to a user equipment, where the E-PDCCH is carried by the E-CCE; and receiving, by the user equipment, the E-PDCCH, and obtaining the REs included in the E-CCE, and receiving, over the REs included in the E-CCE, the E-PDCCH transmitted by the base station. The embodiments of the present invention are used for configuring and detecting a control channel resource.
Abstract:
A method includes determining a type of a first subframe, where the type of the first subframe is a first-type subframe, a second-type subframe, a third-type subframe, or a fourth-type subframe, where the second-type subframe includes an uplink control channel and a downlink channel, the uplink control channel is located after the downlink channel, and there is a guard period between the uplink control channel and the downlink channel. The fourth-type subframe includes an uplink channel and a downlink control channel, the uplink channel is located after the downlink control channel, and there is a guard period between the uplink channel and the downlink control channel. The method also includes transmitting data in the first subframe according to the type of the first subframe.
Abstract:
A data transmission method, a terminal device, and a base station are described. The data transmission method determines, by a terminal device, a first reference signal (RS) sequence corresponding to a first time interval, where the first RS sequence is one of N RS sequences, N is a positive integer greater than 1, and the N RS sequences are generated based on at least two root sequences, sends, by the terminal device, the first RS sequence to a base station in the first time interval, determines, by the terminal device from the N RS sequences according to the first RS sequence, one RS sequence as a second RS sequence corresponding to a second time interval, where the second RS sequence is determined according to the first RS sequence, and sends the second RS sequence to the base station in the second time interval.