Abstract:
Embodiments of the present invention provide a reference signal sending method, a reference signal receiving method, and an apparatus. A reference signal sending method includes: obtaining a reference signal sequence, where the reference signal sequence includes multiple bits and exclusive OR of every two bits separated by one bit in the multiple bits is 1; performing Gaussian Minimum Shift Keying GMSK modulation on the reference signal sequence; and sending a modulated reference signal sequence. In the embodiments of the present invention, a reference signal sequence is designed as a sequence in which exclusive OR of every two bits separated by one bit is 1, GMSK modulation is performed on the reference signal sequence, and the same reference signal sequence is used to perform channel estimation during GMSK demodulation. Compared with a case in which a pseudo random sequence is used as a pilot symbol, channel estimation accuracy is improved.
Abstract:
Embodiments of the present disclosure provide a random access method, a terminal, and a base station. The method includes: receiving, by a terminal (UE), configuration information of random access resources from a base station, where the configuration information of the random access resource includes: configuration information of a first random access resource received from the base station using a system broadcast and configuration information of a second random access resource received from the base station by using downlink control information (DCI); selecting, by the UE, a random access resource from the first random access resource and the second random access resource according to a random access rule and the configuration information of the random access resources; and initiating, by the UE, random access according to the selected random access resource.
Abstract:
Embodiments of the present invention disclose a method for selecting a control channel, and are applied to a communication system, to enable UE to select a control channel suitable for itself in a multi-control channel communications system. The method includes: listening, by UE, to a first control channel, and measuring a value of a performance parameter of a signal received by using the first control channel, and the first control channel is one of the at least two control channels; and when determining, according to the value of the performance parameter, that the first control channel meets a residence condition, determining the first control channel as a target control channel, where the target control channel is used to receive downlink control information sent by a base station.
Abstract:
According to a communication method, a network-side device, and a communications system, a D2D connection is established between a master terminal located within network coverage and a slave terminal located beyond the network coverage, and a common communication connection is established between the master terminal and a network-side device, so that indirect communication can be implemented between the slave terminal located beyond the network coverage and the network-side device by using the master terminal.
Abstract:
The present application provides a synchronization signal sending apparatus, sending method, receiving apparatus, and receiving method, and a system. The signal sending apparatus includes a determining unit and a sending unit. By using embodiments of the present invention, a synchronization signal is in a form of a differential signal, and has relatively strong frequency deviation resistance; and synchronization signals from different transmit ends satisfy a pre-determined relationship property. Therefore, when a receive end performs synchronization by using the synchronization signal, the receive end can eliminate an interfering signal by using the relationship property between the synchronization signals from the different transmit ends, so as to achieve an objective of distinguishing the different transmit ends or distinguishing signals from different cells.
Abstract:
An indication information sending method includes that a base station generates first indication information, and send the first indication information to a terminal device; and where the first indication information is used to indicate a power control manner of a first channel, the power control manner of the first channel is one power control manner in a power control manner set, and the power control manner set comprises a transmit power of a signal on the first channel is determined by a terminal device based on a first parameter; or a transmit power of a signal on the first channel is determined by a terminal device according to a rule predefined on the terminal device.
Abstract:
This application provides a reference signal sequence transmission method. The method includes: generating a reference signal sequence based on a frame number of a radio frame; mapping at least a part of reference signals in the reference signal sequence to a resource position that corresponds to the radio frame and that is used to transmit the at least a part of reference signals; and sending the at least a part of reference signals or an orthogonal reference signal at the resource position, where the orthogonal reference signal is obtained by multiplying the at least a part of reference signals by a preset orthogonal code.
Abstract:
A message transmission method and a device are used to accelerate a random access procedure. The method includes: receiving, by a terminal device, a repetition quantity of an uplink message from a network device, in response to determining that a reference signal receive power (RSRP) range of the terminal device is within an RSRP range corresponding to a signal coverage enhancement level 0, wherein the uplink message comprises a third message of a sequence of messages comprised in a random access attempt; calculating, by the terminal device, transmit power based on a power control parameter for the repetition quantity; and sending, by the terminal device, the uplink message to the network device based on the calculated transmit power.
Abstract:
A communication method includes: determining a preamble including M symbol groups; and sending the M symbol groups in K uplink subframe sets, where any uplink subframe set in the K uplink subframe sets includes one uplink subframe or more than one consecutive uplink subframes, any two uplink subframe sets in the K uplink subframe sets are spaced by at least one downlink subframe, and in each of the K uplink subframe sets at least one symbol group can be sent; N times of frequency hopping exist in the M symbol groups, each of the N times of frequency hopping is frequency hopping between adjacent symbol groups in the M symbol groups, and frequency hopping directions of at least two of the N times of frequency hopping are opposite, N is less than M, K is less than or equal to M, and K, N and M are positive integers.
Abstract:
A communication method includes: determining, by a network side device, at least two pieces of target sub-configuration information according to a co-location rule, where at least two target signals corresponding to the at least two pieces of target sub-configuration information are quasi co-located; and sending, by the network side device, the at least two pieces of target sub-configuration information to the terminal device according to the co-location rule.