Patent application number | Description | Published |
20120082118 | COOPERATIVE COMMUNICATION METHOD AND BASE STATION - A cooperative communications method for a wireless network and a corresponding apparatus. In one embodiment, the method includes: obtaining a matrix corresponding to a destination Mobile Station (MS), where the number of rows of the matrix depends on the total number of antennas of MSs in a cooperative area and the number of antennas of the destination MS, and the number of columns of the matrix depends on the number of code streams sent to the destination MS; calculating a precoding matrix according to local Channel State Information (CSI) and the matrix; performing precoding according to the precoding matrix; and performing cooperative communication according to a result of the precoding. The method of this embodiment enables the reduction or elimination of interference between users by specifying a direction matrix, and is applicable to multi-antenna MSs. A cooperative base station (BS) applicable to the foregoing method is also disclosed. | 04-05-2012 |
20120114062 | PREPROCESSING METHOD, BASE STATION, AND SYSTEM FOR COOPERATIVE COMMUNICATION - A preprocessing method for cooperative communication and a base station and a system for executing the method are provided. The method includes: obtaining a common base station group from a cooperative base station group of a user terminal, in which the common base station group includes a set of base stations providing a cooperative service for other user terminals in the cooperative base station group; and calculating a first precoding matrix of the user terminal according to the common base station group, in which the first precoding matrix is used to perform elimination preprocessing on interference from the user to other user terminals served by the common base station group. The method reduces Multi-User Interference (MUI). | 05-10-2012 |
20120224521 | POWER SAVE METHOD, ACCESS POINT DEVICE, AND STATION DEVICE - A power save method, an AP device and an STA device are provided. According to whether power save is allowed in a current TXOP and whether a station STA is newly added in an operation object identifier of a subsequent frame of each frame of the current TXOP, the AP device respectively sets a TXOP power save indication of each frame, and when the TXOP power save indication of the current frame is power save allowed, the STA device determines whether to enter the Doze state according to a judgment result for a doze condition. The adoption of the method and the device can expand the power save application range, and enhance the power save effect. | 09-06-2012 |
20130148644 | System and Method for Preambles in a Wireless Communications Network - A method for transmitting a frame includes generating an omni portion of the frame, the omni portion including a non-beamformed long training field and a signal field, the non-beamformed long training field including channel estimation information used to decode the signal field, the non-beamformed long training field configured to be transmitted through one of multiple antennas and multiple streams. The method also includes generating a multi-stream portion of the frame, the multi-stream portion including a data field and a multi-stream long training field, the multi-stream long training field including station-specific decoding information for station-specific data in the data field. The method further includes applying a beamforming indicator to the signal field of the omni portion, and transmitting the frame. | 06-13-2013 |
20130177002 | Systems and Methods for AP Discovery with FILS Beacon - A method and apparatus are disclosed for supporting access point (AP) discovery by a handset/station (STA) using a fast initial link setup (FILS) discovery frame. An embodiment method includes transmitting a plurality of FILS discovery frames at faster time intervals than designated for transmitting standard AP beacons, wherein the FILS discovery frames have a smaller size than standard AP beacons. An embodiment apparatus includes a processor and a computer readable storage medium storing programming for execution by the processor, the programming including instructions to broadcast a standard AP beacon for advertising a basic service set (BSS) repeatedly at subsequent time intervals, and broadcast a FILS discovery frame for advertising the BSS repeatedly at faster subsequent time intervals than for the standard AP beacon, wherein the FILS discovery frame has a smaller size than the standard AP beacon. | 07-11-2013 |
20130179943 | Systems and Methods for Authentication - A method of performing authentication involves receiving, by a station, an initiation frame and transmitting, by the station, an authentication request. The authentication request includes an extensible authentication protocol (EAP) over local area network (LAN) (EAPOL) Start and security parameters for a fast initial link setup (FILS) handshake. | 07-11-2013 |
20130283346 | System and Method For Rapid Authentication In Wireless Communications - Various methods and communications devices to improve association and handoff performance of a wireless network are provided. By way of example, a modified state machine that permits reduced security requirements for authentication in order to achieve fast authentication is employed. The modified state machine providing fast authentication remains compatible with the classic state machine implementing the wireless fidelity (WiFi) standard. | 10-24-2013 |
20140023020 | Method, Apparatus, and System for Link Adaptation - The present invention discloses a method. The method includes: obtaining link adaptation update information according to a link state; and sending a block acknowledgment frame to a transmission opportunity holder, where the link adaptation update information is carried in the block acknowledgment frame so that the transmission opportunity holder performs link adaptation according to the link adaptation update information. | 01-23-2014 |
20140071874 | ERROR RECOVERY METHOD, ACCESS POINT DEVICE, STATION DEVICE, AND SYSTEM THEREOF - The embodiments of the present disclosure provide an error recovery method, an access point device, a station device, and a system thereof. The error recovery method includes: transmitting a data frame to a station allowed to enter a power save mode, where the data frame indicates the end of data transmission; and retransmitting the data frame during a current transmission opportunity period if no acknowledgement frame returned by the station in response to the data frame is received. Based on the above technical solution, the access point retransmits the data frame directly during the current transmission opportunity period and there is no need to contend for a new transmission opportunity period to perform the error recovery, thereby speeding up the error recovery and reducing the error recovery delay, thereby increasing the error recovery efficiency, saving the network resources, and improving the quality of service. | 03-13-2014 |
20140079046 | Backoff Method and Device Used For Wireless Communication System - An apparatus, method, and system to provide a backoff method and device used for a lower priority access category AC. The method includes: when the lower priority AC and another AC in a same station STA obtain a transmission opportunity TXOP at the same time and an internal collision occurs, detecting a TXOP sharing state of the lower priority AC; and executing backoff of the lower priority AC according to the detected TXOP sharing state. | 03-20-2014 |
20140080420 | METHOD, DEVICE, AND SYSTEM FOR TRANSMITTING CHANNEL INFORMATION - The present invention discloses a method, device, and system for transmitting channel information, pertaining to the field of radio communication. The method for obtaining channel information includes: transmitting, by a beamformer, a request for obtaining channel information to a beamformee within the duration of a current first TXOP; receiving a null feedback frame transmitted by the beamformee within the duration of the current first TXOP; within the validity period of the channel information, if the beamformer obtains a second TXOP, transmitting, within the second TXOP, a channel information indication frame to request the channel information, and receiving the channel information transmitted by the beamformee. The system includes a beamformer and a beamformee. The present invention saves the signaling resources of the beamformer and reduces the power consumption of the beamformee. | 03-20-2014 |
20140126658 | LINK ADAPTATION FEEDBACK METHOD AND TRANSMITTING DEVICE - Embodiments of the present disclosure provide a link adaptation feedback method, including: receiving, by a transmitting device, a link adaptation feedback frame sent by a communication peer end, where the link adaptation feedback frame includes a modulation and coding scheme feedback request sequence identifier (MSI), where the MSI is configured to indicate space-time block coding type information; determining, according to the space-time block coding type indication information, use information about use of space-time block coding by a data frame related to the link adaptation feedback frame, and selecting, according to the use information, a space-time stream, modulation and coding scheme used when the transmitting device sends a data frame. | 05-08-2014 |
20140185506 | POWER SAVE METHOD AND STATION DEVICE - A power save method and a station device. The method includes: confirming, by a STA, according to a frame type identifier in a received frame, that the frame is an NDPA frame, and obtaining a STA AID in a STA information field in the NDPA frame; comparing, by the STA, its STA AID with the obtained STA AID, and determining whether its STA AID is the same as the obtained STA AID; and when the STA determines that its STA AID is different from the obtained STA AID, allowing the STA to enter a doze state. The method reduces the power consumption during the TXOP period and saves resources. | 07-03-2014 |
20140307679 | Indication Map Delivery Method, Indication Operation Method, Device, and System - An indication map delivery method, an indication operation method, a device, and a system are provided. In the embodiments of the present invention, a compressed Indication Map (IM) generated by a wireless access device includes at least one of a tiny partial bitmap sub-element, a skipped indication bits sub-element, and an indication bit offset sub-element, and consecutive indication bits with the same value at positions in an original IM can be compressed into a skipped indication bits sub-element, an indication bit offset sub-element, or the like. The technical solutions of the embodiments of the present invention facilitate improvement of compression efficiency of an IM, and further reduce radio air interface resources occupied for sending the IM and improve IM sending efficiency. | 10-16-2014 |
20140307747 | METHOD AND APPARATUS FOR TRANSMITTING DATA FRAME - The embodiments of the present invention provide a method and an apparatus for transmitting a data frame. The method comprises: acquiring at least one address of a destination address (DA) and a source address (SA), that are corresponding to data transmission direction information; determining, according to the data transmission direction information, an address field for carrying at least one address of the DA and the SA; and sending the data frame comprising the address field to a receiver. The method and apparatus for transmitting a data frame disclosed by the present invention can reduce overhead of an MAC frame header, improve transmission efficiency, and enable a station to acquire DA and/or SA of a data frame. | 10-16-2014 |
20140334287 | Method and Apparatus for Handling Address Conflict - A method and an apparatus for handling an address conflict. The method for handling an address conflict includes: acquiring a media access control (MAC) address of an associated first node and a first auxiliary identifier; receiving a MAC frame that carries the first auxiliary identifier; and sending an auxiliary identifier conflict report message to the first node when it is determined that the MAC frame is sent by a second node. According to the method and the apparatus for handling an address conflict in the embodiments of the present invention, the following problem can be detected and resolved. An AP auxiliary identifier conflict is caused by a MAC header compression method where an auxiliary identifier is used to replace a MAC address. | 11-13-2014 |
20150016327 | POWER SAVE METHOD, ACCESS POINT DEVICE, AND STATION DEVICE - A power save method, an AP device and an STA device are provided. According to whether power save is allowed in a current TXOP and whether a station STA is newly added in an operation object identifier of a subsequent frame of each frame of the current TXOP, the AP device respectively sets a TXOP power save indication of each frame, and when the TXOP power save indication of the current frame is power save allowed, the STA device determines whether to enter the Doze state according to a judgment result for a doze condition. The adoption of the method and the device can expand the power save application range, and enhance the power save effect. | 01-15-2015 |
20150071304 | METHOD AND APPARATUS FOR CONTROLLING DATA TRANSMISSION - 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. | 03-12-2015 |