Huawei Technologies Co., Limited

Tong Ji

Zhe Jin

Weiliang Zhang

Yongxia Lyu

Wen Zhang

Yiling Wu

Xiaolei Tie

Zhihu Luo

Zhe Chen

Yuwan Su

Robert William Young

Sha Ma

Chaojun Li

Yinghui Yu

Yongxia Lv

Baokun Shan

Guangwei Yu

Brian Martin Gaffney

Meng Hua

Juan Zheng

Li Chen

Zhiqin Yu

A message transmission method and device relating to the field of communications technologies are described that improve an anti-interference capability in message transmission. The method includes generating a scrambling code according to a scrambling code initialization seed, wherein the scrambling code initialization seed meets the following expression: c=R·2+P·(nmod+1)·2and then scrambling a message according to the scrambling code. The method further includes sending the scrambled message to a terminal on a physical downlink shared channel. 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.

Message transmission method and device

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.

Synchronization signal transmission method and communications apparatus

An indication information sending method includes that a base station generates first indication information and sends the first indication information to a terminal device. The first indication information indicates a power control manner of a first channel, the power control manner being one power control manner in a power control manner set providing transmit power of a signal on the first channel is determined by a terminal device based on a first parameter or according to a rule predefined on the terminal device.

Indication information sending method, indication information receiving method, device, and system

A message transmission method and device relating to the field of communications technologies are described that improve an anti-interference capability in message transmission. The method includes generating a scrambling code according to a scrambling code initialization seed, wherein the scrambling code initialization seed meets the following expression: c=R·2+P·(mod)·2and then scrambling a message according to the scrambling code. The method further includes sending the scrambled message to a terminal on a physical downlink shared channel. 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.

The present disclosure relates to the field of wireless communications technologies, relates to a signal sending device, a signal receiving device, a symbol timing synchronization method, and a system, and resolves a problem that complexity of symbol timing synchronization performed by a terminal with relatively low crystal oscillator accuracy is high. In a receiving device, a receiving module receives a synchronization signal including a first signal and a second signal. The first signal includes N1 generalized ZC sequences, and the second signal includes N2 generalized ZC sequences. The second signal is used to distinguish different cells or different cell groups. There are at least two generalized ZC sequences with different root indexes in (N1+N2) generalized ZC sequences. A processing module performs a first sliding correlation operation and a second sliding correlation operation on the synchronization signal, and performs symbol timing synchronization according to a relationship between a sliding correlation peak generated when a sliding correlation is performed on the N1 generalized ZC sequences and a sliding correlation peak generated when a sliding correlation is performed on the N2 generalized ZC sequences. This has relatively low implementation complexity, compared with an existing method in which grid search should be performed multiple times to compensate for a relatively large phase rotation.

Signal sending device, signal receiving device, symbol timing synchronization method, and system

A message transmission method and device relating to the field of communications technologies are described that improve an anti-interference capability in message transmission. The method includes generating a scrambling code according to a scrambling code initialization seed, wherein the scrambling code initialization seed meets the following expression: c=R&#xb7;2+P&#xb7;(mod+1)&#xb7;2and then scrambling a message according to the scrambling code. The method further includes sending the scrambled message to a terminal on a physical downlink shared channel. 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.

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.

The present disclosure discloses a method for transmitting downlink feedback information, a base station, and a terminal device, so as to ensure that the base station correctly receives the downlink feedback information sent by the terminal device, thereby effectively improving a transmission success rate of the downlink feedback information. In embodiments of the present disclosure, the method includes: sending, by the base station, indication information to the terminal device, where the indication information is used to indicate a target time-frequency resource location, the target time-frequency resource location is a time-frequency resource location at which the terminal device sends the downlink feedback information, and the downlink feedback information is used to feed back a reception status of downlink data that should be received by the terminal device; and receiving, by the base station, the downlink feedback information sent by the terminal device.

Method for transmitting downlink feedback information, base station, and terminal device

A method for scheduling resources is disclosed herein. A terminal device receives a downlink control information (DCI) indication sent by a network device. The DCI is used to indicate a first resource, and the first resource is a time-frequency resource for a narrowband physical uplink shared channel (NPUSCH) format 2 transmission. The NPUSCH format 2 is used to bear downlink hybrid automatic repeat request-acknowledgment (HARQ-ACK) feedback information. The terminal device determines the first resource according to the DCI, and sends a scheduling request to the network device on the first resource.

Resource scheduling method, terminal device, and network device

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.

Message transmissions based on power control parameters

Embodiments of the present invention disclose a signal sending method and apparatus and a signal receiving method and apparatus. The signal sending method includes: generating, by a network device, a first signal, where the first signal includes at least one sequence pair, each of the at least one sequence pair includes two sequences, and an element value of one sequence of the two sequences is a value obtained by calculating, according to a first calculation rule, an element value of the other sequence of the two sequences and an element value of a first sequence corresponding to the other sequence, where each sequence in the at least one sequence pair and the first sequence are complex sequences with lengths greater than 1; and sending, by the network device, the first signal to a terminal device.

Signal sending method and apparatus and signal receiving method and apparatus

Example signal transmission methods and apparatus are described. One example method includes generating a first signal by a network device, where the first signal is used to indicate to a terminal device whether there is paging scheduling information on a first paging occasion. The network device determines a first resource based on at least one of a paging configuration parameter, a first parameter set, a terminal device identifier, or a terminal identification code. The network device sends the first signal to the terminal device on the first resource. The signal transmission methods, network device, and terminal device in the embodiments of this application enable the terminal device to determine, based on the first signal, whether to listen on a downlink control channel, reducing power consumption of the terminal device.

Signal transmission method, network device, and terminal device

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.

Indication signal configuration method and device

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 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 over a channel, to effectively eliminate inter-cell interference and resolve a possible target cell false alarm problem.

Random access preamble transmission method and apparatus

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.

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Beijing, China

Tong Ji