Huawei Technologies Co., Limited

Wurong Zhang

Wei Quan

Yi Shan Jiang

Guanglin Han

Guangwei Yu

Feng Yu

Tao N Zhang

Tao Zhang

Zhongbin Qin

Zhenyu Li

Qiao Zhang

Yang Nan

Jinxia Han

Rong Zhou

Feng Gao

Anjian Li

Haifeng Yu

Dengkun Xiao

Li Ni Zhang

Ronghui Wen

Wenjie Wang

Yi Jiang

Embodiments of the present invention relate to the field of communications technologies and provide a method for transmitting system information, an apparatus, and a system, to reduce a delay in obtaining correct system information by a terminal device. One method includes: generating a system information block SIB, and sending the SIB in N time units of a SIB period, wherein a first time unit of the N time units includes a redundancy version number of the SIB that is set to 0, the SIB period comprises T time unit groups, and the T time unit groups comprise TSIB candidate sending time unit groups, wherein T&#x2264;T, each of the T time unit groups comprises A time units for a clear channel assessment (CCA), and each of the TSIB candidate sending time unit groups comprises r SIB candidate sending time units, and wherein N is a total quantity of SIB candidate sending time units comprised in one or more of the TSIB candidate sending time unit groups that the CCA is successful, and N&#x2264;T&#xd7;r.

Method for transmitting system information, apparatus, and system

This application provides a data transmission method and apparatus. The method includes: determining a first frequency hopping pattern and a second frequency hopping pattern, wherein the first frequency hopping pattern and the second frequency hopping pattern comprises a same index set of N indexes corresponding to N channels; sending, based on the first frequency hopping pattern, data in each time unit of a first time period by using one of the N channels; and sending, based on the second frequency hopping pattern, data in each time unit of a second time period by using one of the N channels, wherein the first period and the second period are consecutive time periods each comprising N time units, each time unit starts and ends at starting times of two adjacent channels.

Data transmission method and apparatus

A method includes determining, by a network side device, N fixed channels. The method further includes determining, by the network side device, a first fixed channel from the N fixed channels, sending, by the network side device, a discovery reference signal on the first fixed channel, and performing data transmission on a data channel through frequency hopping. The data channel includes a channel other than the N fixed channels. N is an integer greater than or equal to 2.

Wireless communication method and apparatus

Embodiments of the present disclosure provide a time service method, a terminal device, and a network device. The method includes: determining, by a terminal device, a first moment of a first downlink message, and determining a second moment of the first downlink message; determining, by the terminal device, a third moment of a first uplink message, and determining a fourth moment of the first uplink message; and determining, by the terminal device, a time offset between the terminal device and the network device based on the first moment, the second moment, the third moment, and the fourth moment. According to the method provided, a time service error is effectively reduced.

Time service method, terminal device, and network device

The present disclosure provides a method, system, and terminal device for data transmission in an unlicensed spectrum, effectively reduce mutual signal interference between different systems while meeting regulation constraints on use of the unlicensed spectrum. The method in the present disclosure includes: at a processing start moment of a terminal device in a current channel occupancy time window of a network device, when remaining duration of the current channel occupancy time window of the network device is greater than or equal to duration for the terminal device to transmit a to-be-sent data packet to the network device, selecting based on a user attribute of the terminal device and from a mapping relationship between a user attribute and a transmission mode; and sending the to-be-sent data packet to the network device in the selected transmission mode.

Method, system, and terminal device for data transmission in unlicensed spectrum

Embodiments of this application provide a synchronization signal sending method and apparatus. The method includes: obtaining an initial synchronization sequence, where a spectrum width corresponding to the initial synchronization sequence is greater than a bandwidth of a synchronization channel and is less than a sum of the bandwidth of the synchronization channel and a system protection bandwidth; dividing the initial synchronization sequence into N sub-synchronization sequences; carrying the N sub-synchronization sequences on N time-domain symbols; and sending the N time-domain symbols to a receiving apparatus. According to the synchronization signal sending method provided in the embodiments of this application, a bandwidth loss of a synchronization signal is reduced, and utilization and synchronization performance of a system synchronization bandwidth are improved.

Synchronization signal sending method and apparatus

Embodiments of the present application provide a data transmission method, and the method is used for communication between UE and a base station on an unlicensed spectrum. The method includes: sending, by the UE, a data packet to the base station and starting a timer during a current COD of the base station; determining a first end moment of the current COD; pausing the timer at the first end moment; determining a second end moment of an LP in a next COD of the base station; resuming the timer at the second end moment; and receiving, before the resumed timer expires, a response message from the base station. In the embodiments of the present application, the UE suspends the timer at the end moment of the previous COD and resumes the timer at the end moment of the LP of the next COD.

Data transmission method, user equipment, and base station

A method for resource allocation includes: a base station determining a user equipment UE to which a resource block is to be allocated; and if the index number of any resource block among the allocated resource blocks of the UE falls within a preset first index number range, judging whether the number of the allocated resource blocks of the UE is less than the preset first parameter value.

Method for resource allocation and base station

A method for resource allocation according to the embodiments of the present invention includes: a base station determine a user equipment UE to which a current allocated resource block is allocated; if the index number of any resource block among the allocated resource blocks of the UE falls within a preset first index number range, judging whether the number of the allocated resource blocks of the UE is less than the preset first parameter value.

A power control method includes obtaining power headroom information of an aggregated carrier of a User Equipment (UE). The aggregated carrier includes at least one component carrier group and at least one first carrier, or includes at least one component carrier group, or includes at least two first carriers. The component carrier group includes at least two second carriers, and the first carrier and the second carrier are single carriers, The method also includes adjusting transmit power of the aggregated carrier according to the power headroom information.

Method and apparatus for power control

The present invention discloses a method for reporting a power headroom report and a user equipment, which are applied in the field of communications. The method includes triggering reporting of a first power headroom report and determining that a condition of sending the first power headroom report is satisfied. The condition of sending the first power headroom report includes a determination that uplink data channel transmission occurs in a current transmission time interval. The first power headroom report is obtained. The first power headroom report includes a first power headroom value that includes a difference between maximum transmitting power of a carrier and a sum of transmitting power of a control channel of the carrier and transmitting power of a data channel of the carrier.

Method for reporting power headroom report and user equipment

Embodiments of the present invention disclose a method, an apparatus, and a terminal for determining a transmission mode, which relate to the field of communications technologies and are invented to enable a selection of a transmission mode with lower power consumption for a terminal to reduce the power consumption of the terminal. The method includes: selecting a transmission mode for a terminal according to a network resource condition; judging whether the selected transmission mode matches according to capability information reported by the terminal and if the selected transmission mode matches, setting the transmission mode as a current transmission mode of the terminal. The embodiments of the present invention are mainly applicable to a Long Term Evolution Advance (LTE-A) system.

Method, apparatus, and terminal for determining transmission mode

A power control method is provided, which is applicable to the communication field. The method includes: obtaining power headroom information of an aggregated carrier of a User Equipment (UE), where the aggregated carrier includes at least one component carrier group and at least one first carrier, or includes at least one component carrier group, or includes at least two first carriers, the component carrier group includes at least two second carriers, and the first carrier and the second carrier are single carriers; and adjusting transmit power of the aggregated carrier according to the power headroom information. The method enables reporting of power headroom of an aggregated carrier of the UE in a multi-carrier scenario, so that the base station can control the transmitting power of the UE reliably, and therefore, reliability and throughput of the system are improved.

Embodiments of the present invention disclose a modulation method and apparatus. The modulation method includes: processing at least two data blocks, and outputting at least two single-carrier Orthogonal Frequency Division Multiplex (OFDM) signals, where the at least two data blocks include a first data block and a second data block, the at least two single-carrier OFDM signals include a first single-carrier OFDM signal corresponding to the first data block and a second single-carrier OFDM signal corresponding to the second data block, a difference between a carrier center frequency RFof the first single-carrier OFDM signal and a carrier center frequency RFof the second single-carrier OFDM signal is an integral multiple of an F, and the Fis a subcarrier bandwidth; and transmitting the at least two single-carrier OFDM signals.

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Beijing, China

Wurong Zhang