Huawei Technologies Co., Limited

Future Wei Technologies, Inc.

Huawei Device Co., Ltd.

Huawei Technologeis Co., Ltd.

Tianyu Wu

Yunbo Li

Xun Yang

Changle Li

Chen Chen

Jiayin Zhang

Yalin Liu

Peter Loc

Hufei Zhu

Lina Zhu

Hui Han

Jian Ding

Kwok Shum Au

Bo Li

Yi Luo

Jin Yang

Xingxin Zhang

Menghong Liu

Osama S Aboul-Magd

Hao Li

Rui Wang

Zhiming Ding

Jun Zhu

Yingpei Lin

Chixiang Ma

Hang Lin

Ross David Murch

Wai Ho Mow

Kin Nang Lau

Lvxi Yang

Junghoon Suh

Qiao Qu

Bo Yang

Lianbo Zhang

Chunguo Li

Shu Kwan Cheng

Zhiwei Dai

Shuai Hao

Wing Chau Chan

Disclosed is a data transmission method. The method comprises: reserving a first channel and a second channel, where the first channel is used for transmitting data and the second channel is used for transmitting ACKs; sending data to a receiving end on the first channel that is reserved; receiving an ACK that is sent by the receiving end and corresponds to the data on the second channel that is reserved and determining whether the data needs to be cached based on information carried in the ACK; and if the information carried in the ACK indicates that the receiving end has correctly received the data, clearing the data that is cached by a sending end. Through separate transmission of the data and the ACK, an efficiency problem of the sending end in providing MAC in a wireless system in a condition of a limited cache capacity is resolved.

Data transmission method and device

Embodiments of the invention provide a contention method. The contention method includes: receiving, by an access point, an uplink frame transmitted by a station; transmitting, by the access point, a frame responding to the uplink frame. The frame responding to the uplink frame is used to acknowledge the uplink frame and trigger the station to enter the next channel contention period. The contention method can acknowledge the uplink frame and trigger the station to enter the next channel contention period.

OFDMA contention method and access point

Embodiments provide a channel contention method and apparatus. The channel contention apparatus belongs to a basic service set (BSS). The BSS includes an access point (AP) and at least one first station (STA). Both the AP and the at least one first STA participate in channel contention. The apparatus is the AP or any first STA. The apparatus includes a sensing module configured to sense a channel. The apparatus also includes a contention module configured to contend for the channel. The AP centrally performs control and scheduling so that all of at least one network device in the BSS can transmit data using the channel.

Channel contention method and apparatus

Embodiments of the present invention provide a method for establishing an association between a STA and an AP, and the method includes: sending, by the STA, an association request frame to the AP, where the association request frame includes a service type element, and the service type element is used for indicating a sensor service type, an offloading service type, or a hybrid service type to which the STA belongs, where the sensor service type includes a first sensor service or a second sensor service, and the offloading service type includes a first offloading service or a second offloading service; and receiving, by the STA, an association response frame sent by the AP, where the association response frame is generated by the AP after determining, according to the service type element, a service type to which the STA belongs.

Method for establishing association between station and access point, and device

A data transmission method is provided. The method comprises: reserving a first channel and a second channel, where the first channel is used for transmitting data and the second channel is used for transmitting ACKs; sending data to a receiving end on the first channel that is reserved; receiving an ACK that is sent by the receiving end and corresponds to the data on the second channel that is reserved and determining whether the data needs to be cached based on information carried in the ACK; and if the information carried in the ACK indicates that the receiving end has correctly received the data, clearing the data that is cached by a sending end. Through separate transmission of the data and the ACK, an efficiency problem of the sending end in providing MAC in a wireless system in a condition of a limited cache capacity is resolved.

A method includes determining at least one first station; and sending first indication information to the first station, where the first indication information is used for indicating at least one first backoff duration, so that the first station performs a data transmission operation by using the first backoff duration, and the first backoff duration used by the first station to perform a data transmission operation is less than a second backoff duration used by a second station to perform a data transmission operation, or the first backoff duration used by the first station to perform a data transmission operation is greater than the second backoff duration used by the second station to perform a data transmission operation. Shortening backoff durations of some stations can ensure that these stations send data first, and extending backoff durations of some stations can ensure that the other stations send data first.

Method and apparatus for controlling data transmission

A scheduling method, including: listening to, by a station, a first beacon frame containing a DTIM message used for indicating a beacon interval allocated for each group of stations within a current scheduling period; determining the beacon interval allocated for the station within the current scheduling period according to the DTIM message contained in the first beacon frame; listening to, by the station, within the beacon interval allocated for the station, a second beacon frame containing scheduling information of the current beacon interval used for indicating a time period allocated to each group of stations for data transmission within the current beacon interval; when data transmission is required, transmitting, by the station, data within the time period allocated to the group of the station according to indication of the scheduling information. The present invention improves utilization of time periods, saves time resources and enhances transmission efficiency.

Scheduling method and system, access point and station

The present disclosure discloses a channel contention method, an access point, and a station. The method includes: sending, by an AP, an RTS frame, where the RTS frame carries group response indication information, and the group response indication information is used to instruct multiple STAs to return CTS frames; receiving, by the AP, a CTS frame that is returned according to the group response indication information by a STA among the multiple STAs that receives the RTS frame; and determining, by the AP according to the received CTS frame, that a transmission opportunity is obtained. According to the channel contention method, the access point, and the station in the embodiments of the present disclosure, data transmission between an AP and multiple STAs can be effectively protected with a relatively small overhead, and system efficiency can be improved.

Channel contention method, access point, and station

The present disclosure provides a data transmission method and device. The method includes sensing, by a station, whether a channel allocated by an access point associated with the station is occupied, before obtaining a downlink scheduling phase. If the channel is not occupied, sending, by the station, channel clear signaling to the access point, where the channel clear signaling includes a first identifier used for identifying the station and a second identifier used for identifying the access point. The method also includes receiving, by the station in the downlink scheduling phase, data transmitted by the access point. The present disclosure ensures normal data transmission.

The present invention discloses a channel reservation method and a communications device. The method includes: generating, by a first device, a first indication frame, where the first indication frame is used for indicating a moment at which a second device sends a channel reservation frame, and the channel reservation frame is used for reserving a channel to be used when the first device sends data to the second device; and sending, by the first device, the first indication frame to multiple second devices. In the channel reservation method, a sender device in a data transmission process indicates a moment at which a receiver device sends a channel reservation frame, so that multiple receiver devices in the data transmission process send channel reservation frames at the same time, which avoids contention between the receiver devices in current data transmission, thereby reducing a collision probability, and reducing system overheads.

Channel reservation method and communications device

Embodiments provide a channel contention method and apparatus. The channel contention apparatus belongs to a basic service set (BSS). The BSS includes an access point (AP) and at least one first station (STA). Both the AP and the at least one first STA participate in channel contention. The apparatus is the AP or any first STA. The apparatus includes a sensing module configured to sense a channel. The apparatus also includes a contention module configured to contend for the channel. The AP centrally performs control and scheduling so that all of at least one network device in the BSS can transmit data by using the channel.

Embodiments disclose a channel resource allocation method and a communications device. The method includes acquiring, by a first device, scheduling information from an access point. The method also includes, if the first device is pre-scheduled by the access point according to the scheduling information to receive data from a second device in a first timeslot of a first channel, and before a start moment of data transmission time corresponding to the first timeslot of the first channel, sending, by the first device, a contention frame to contend for the first timeslot of the first channel.

Channel resource allocation method and communications device

Embodiments provide a signal transmission method and apparatus. The method includes: modulating, by using a phase-shift keying PSK scheme with rotation of a first angle, at least a part of pilot information carried in at least one signaling symbol in a signaling field of a data packet, to obtain modulated pilot information; and sending, to a receive end, a data packet that carries the modulated pilot information. A modulation scheme different from a conventional modulation scheme is used in the embodiments to modulate pilot information carried in a signaling symbol in a signaling field of a data packet, so that a data packet format corresponding to the modulation scheme can be effectively detected at a receive end.

Modulation and detection of symbols with varied phase rotation

A bandwidth adjustment method includes: determining a bandwidth update value of a channel of a first network system and a bandwidth update value of a channel of a second network system and a bandwidth update value of a protective bandwidth according to a request of a user or a channel condition, so that updated bandwidths of the channels of the first network system and the second network system meet the request of the user or are adapted to requirements of channel conditions. By using the technical schemes, a network resource can be adjusted between multiple network systems when the multiple network systems share one network resource, thereby helping improve the application efficiency of a bandwidth resource and ensuring anti-interference capabilities of the network systems.

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Shenzhen, China

Tianyu Wu