摘要:
A message transmission method and device relating to the field of communications technologies is disclosed, so as to improve an anti-interference capability in message transmission. The method includes: generating, by a base station, a scrambling code according to a first time parameter; then scrambling a system message according to the scrambling code; and finally sending the scrambled system message to a terminal on a physical broadcast channel. In this technical solution, because the first time parameter has different values at at least two different moments, scrambling codes determined at the at least two corresponding different moments are different. Therefore, a possibility at which the base station uses a same scrambling code to scramble a same system message repeatedly in a time period is reduced, so that an anti-interference capability in system message transmission is improved.
摘要:
An indication signal configuration method and device are provided, and relate to the field of communications technologies. The method includes: sending, by a network device, first configuration information and second configuration information; sending a first indication signal on a first carrier; and sending a second indication signal on a second carrier, where the first configuration information is used to indicate duration of the first indication signal corresponding to the first carrier, the second configuration information is used to indicate duration of the second indication signal corresponding to the second carrier, the first terminal device is a terminal device that needs to receive the first indication signal, and the second terminal device is a terminal device that needs to receive the second indication signal.
摘要:
Embodiments of this application provide a random access preamble transmission method and an apparatus. The method includes: obtaining, by a terminal device, a scrambling code sequence, scrambling a random access preamble by using the scrambling code sequence, and finally sending a scrambled random access preamble to a network device. In this technical solution, the terminal device scrambles the random access preamble, and sends the scrambled random access preamble, to effectively eliminate inter-cell interference, and resolve a possible target cell false alarm problem.
摘要:
Embodiments of the present invention disclose a data transmission method, device, and system, are applied to the field of communications, and can improve data transmission efficiency and reduce a time delay. The method includes: acquiring, by a sending device, a time-frequency resource and interleaver information that are to be used by to-be-sent data, where the interleaver information includes a correspondence between an interleaver and a time synchronization code, and there is a one-to-one correspondence between a time synchronization code and an interleaver; selecting a time synchronization code and an interleaver for the to-be-sent data according to the interleaver information; and performing interleaving processing on the to-be-sent data by using the selected interleaver, and sending, to a receiving device on the time-frequency resource, the interleaved to-be-sent data that carries the selected time synchronization code. The embodiments of the present invention are applied to data transmission.
摘要:
The present invention relates to the field of communications technologies, and provides an uplink data transmission method and apparatus. The method includes: determining a size of a to-be-sent data packet; obtaining a time-frequency resource and a data transmission format that correspond to the size of the to-be-sent data packet; and sending the to-be-sent data packet to a base station on the time-frequency resource according to the data transmission format.
摘要:
An indication information sending method, an indication information receiving method, a device, and a system are provided, and relate to the field of wireless communications technologies. The method includes: generating, by a base station, first indication information, and sending the first indication information to a terminal device; and receiving, by the terminal device, the first indication information, and determining a power control manner of a first channel based on the first indication information, where the first indication information is used to indicate the power control manner of the 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 includes at least one power control manner. Because a network device can indicate the power control manner of the first channel to the terminal device by using the first indication information, compared with the prior art, the terminal device determines a transmit power of a signal in a more flexible manner, so that the terminal device can better adapt to a current network.
摘要:
This application provides a synchronization signal transmission method and a communications apparatus. The synchronization signal transmission method and the communications apparatus are applied to the communications field. In the synchronization signal transmission method, a synchronization signal generated and sent by a network device may include a first sequence and a second sequence. The first sequence is a first complex sequence or a sequence obtained based on the first complex sequence. The second sequence is a sequence obtained based on the first complex sequence, and the second sequence is different from the first sequence. Because a correlation processing result between the first sequence and the second sequence is still a complex sequence, there is a good correlation property, so that a terminal device can obtain a relatively sharp correlation peak when synchronizing with the network device based on the synchronization signal, thereby effectively shortening duration required for synchronization.
摘要:
This application provides a signal transmission method, a terminal device, and a network device. The method includes: determining, by a terminal device, a first transmit power based on an access status of the terminal device at a current coverage level and/or a first power control parameter; and transmitting a signal at the first transmit power. According to the signal transmission method, the terminal device, and the network device in the embodiments of this application, interference to uplink transmission of another terminal device can be reduced.
摘要:
An indication information sending method, an indication information receiving method, a device, and a system are provided, and relate to the field of wireless communications technologies. The method includes: generating, by a base station, first indication information, and sending the first indication information to a terminal device; and receiving, by the terminal device, the first indication information, and determining a power control manner of a first channel based on the first indication information, where the first indication information is used to indicate the power control manner of the 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 includes at least one power control manner. Because a network device can indicate the power control manner of the first channel to the terminal device by using the first indication information, compared with the prior art, the terminal device determines a transmit power of a signal in a more flexible manner, so that the terminal device can better adapt to a current network.