Abstract: A server uploads each data block of the file into a first storage space of the server. The server deletes repetitive data blocks of the file from the first storage space. The server backs up the repetitive data blocks into a third storage space of the server from the first storage space when the repetitive data blocks are not backed up, and backs up the uploaded data blocks of the file into the third storage space from a second storage space of the server.

Abstract: In a method for distributing files, a size of the file is read. The file is transmitted to a whole file server in response that the size of the file does not exceed a preset value. A file header data of the file is read and format information of the file is acquired from the file header data, in response that the size of the file exceeds the preset value. A chunking technology for dividing the file is determined according to the format of the file. If a FSP technology is suitable for the file, the file is transmitted to a FSP server. If a CDC technology is suitable for the file, the file is transmitted to a CDC server. If a SB technology is suitable for the file, the file is transmitted to a SB server.

Abstract: A method includes determining, at a transmitter, whether the transmitter supports multi-fragment acknowledgment (MFA) based on a parameter of the transmitter. The method also includes transmitting a first frame to a receiver. A fragment block acknowledgment (BA) support sub-field of a sub-1 gigahertz (S1G) capabilities information field of a S1G capabilities element of the first frame has a first value in response to determining that the transmitter supports MFA. The fragment BA support sub-field has a second value in response to determining that the transmitter does not support MFA.

Abstract: An apparatus for wireless communication includes a processing system. The processing system is configured to estimate a power spectral density of a first signal. In addition, the processing system is configured to determine a normalized correlation detector between the estimated power spectral density and a known power spectral density of a second signal. Furthermore, the processing system is configured to determine whether the first signal contains the second signal based on the normalized correlation detector.

Abstract: Methods, devices, and systems for retransmitting Media Access Control (MAC) protocol data units (MPDUs) in a multi-user multiple-input and multiple-output (MU-MIMO) communication system are disclosed. Concurrent data streams within a first transmission window are transmitted. Each concurrent data stream is associated with a different recipient and includes an equal number of MPDUs. An indication of a retransmission subset of the MPDUs to be retransmitted for each concurrent data stream may be obtained if errors are present. The retransmission subset for each concurrent data stream is retransmitted within a second transmission window. A length of the second transmission window is as long as the longest of the retransmission subsets of the concurrent data streams. One or more new MPDUs may be added to the concurrent data streams in the second transmission window so that each concurrent data stream in the second transmission window carries a same number of MPDUs.

Abstract: In accordance with an embodiment, a method of operating a multi-output wireless transmitter includes determining a precoded data stream based on input data, where the determining includes determining a signal to interference plus noise ratio (SINR) of a plurality of receivers, determining a channel gain to each of the plurality of receivers, and maximizing a sum of utility functions, wherein each utility function is proportional to the SINR of each of the plurality of receivers at low SINR values and asymptotically approaches a constant value at high SINR values. The precoded data stream is transmitted on the multi-output wireless transmitter.

Abstract: A method includes in response to receiving a modified enhanced distributed channel access (EDCA) parameter set IE at a station, determining a value of an EDCA parameter based on a delta value in the modified EDCA parameter set IE and based on a base value of the EDCA parameter.

Abstract: A method includes, in response to receiving a delta value of an enhanced distributed channel access (EDCA) parameter at a station, determining a value of the EDCA parameter based on the delta value and based on a base value of the EDCA parameter. The method also includes, in response to receiving an EDCA parameter set information element (IE), determining the value of the EDCA parameter based on the EDCA parameter set IE. The method further includes, in response to no delta value or EDCA parameter set IE being received at the station during a time period, setting the value of the EDCA parameter to a default value of the EDCA parameter.

Abstract: The present invention comprises methods and systems of a network of sensor devices to monitor environmental conditions. Each sensor device is capable of acquiring environmental data and transmitting the data to a central controller of a networking system by wireless communication. By processing the environmental data obtained from the geographically deployed sensor devices, the central controller is capable of detecting a trend of the hazardous condition. The central controller generates early warning signals based on the hazardous levels of the physical or environmental conditions, as well as the trend of such conditions. When receiving a high level of hazardous conditions from one of the networked sensor devices, the central controller can compare the results with neighboring sensor devices to determine whether the signal received is due to a hazard leakage or a sensor device malfunction, so to reduce false alarms and provide feedbacks to communication devices networked in the system.

Abstract: A method is provided for wirelessly transmitting from a transmitter to one or more receivers within a multi-user (MU) multiple-input and multiple-output (MIMO) communication system. A number of concurrent (spatial) streams are dynamically allocated in a MU-MIMO transmission to each of a plurality of served receivers to maximize total data transmitted on each transmission. Streams are allocated according to a corresponding transmission queue length for each receiver and the number of receive antennas used by each of the served receivers. A transmission timer is started upon sending the transmission. A random backoff counter is also started upon one of either: (a) expiration of the transmission timer or (b) receipt of data at a transmission queue. A new transmission is sent upon expiration of the random backoff counter if the transmission timer has expired. Otherwise, the random backoff counter is restarted one or more times until the transmission timer has expired.

Abstract: Systems, methods, and devices for acknowledging communications from a plurality of wireless devices in a wireless network are described herein. In some embodiments, an access point for the wireless network transmits a group acknowledgment (ACK) to indicate whether communications (packets) from the plurality of wireless devices have been received or correctly decoded within some time interval. Each wireless device may have a different time interval associated with it. For some embodiments, the time interval for a wireless device is relative to when a previous group ACK was sent. A group ACK may include a bitmap. In some embodiments, the bitmap indicating whether a communication has been received or correctly decoded may be transmitted as part of a beacon.

Abstract: Systems, methods, and devices for discovering a wireless communications network are described herein. In some aspects, a transmitter of a station is configured to transmit a probe request. The probe request is addressed to one of a wildcard service set identifier and a service set identifier of a service set in which a relay operates. A receiver of the station is configured to receive a probe request response from the relay. The probe response comprises an identification of an access point the relay is associated with and capabilities of the relay.

Abstract: Systems, methods, and devices for communicating data in a wireless communications network are described herein. In some aspects, a receiver of a relay is configured to receive a relay initiator frame and a data frame. A transmitter of the relay is configured to transmit an amplified version of the data frame at a same or substantially same time as a time that the data frame is received if the relay initiator frame is received prior to the data frame.

Abstract: The deferral mechanism described herein may improve medium reuse in a wireless network with transmit power imbalances. For example, in one embodiment, an apparatus employing the deferral mechanism described herein may comprise a receiver to sense a data unit transmitted on a medium associated with the wireless network, wherein the data unit may comprise information indicating a transmit power associated therewith. Furthermore, the apparatus may comprise one or more processors to initiate a transmission on the medium associated with the wireless network if the apparatus is not an intended receiver of the sensed data unit, the transmit power associated with the data unit exceeds a transmit power associated with the apparatus, and a received power associated with the data unit does not equal or exceed a clear channel assessment threshold plus a difference between the transmit power associated with the data unit and the transmit power associated with the apparatus.

Abstract: Systems, methods, and devices for registering a relay in a wireless communications network are described herein. In some aspects, a device is configured to operate as a relay and to transmit an association message. The association message comprises capabilities of the device and an indication of whether the device relays uplink traffic, downlink traffic, or both. An access point is configured to receive the association message to associate the device with the access point based on the association message and to transmit a beacon message to a station. The beacon message comprises an indication of whether the access point is associated with a relay.

Abstract: Systems, methods, and devices for setting up a relay in a wireless communications network are described herein. In some aspects, a transmitter of a station is configured to transmit a relay request to an access point. The access point is configured to transmit a discovery request frame based on the relay request to at least one relay. Each of the at least one relay is configured to transmit a discovery message based on the discovery request frame to the station. A processor of the station is configured to select one relay of the at least one relay based on each received discovery message. The transmitter is further configured to transmit a message comprising an identification of the selected one relay of the at least one relay to the access point.

Abstract: Systems, methods, and devices for communicating data in a wireless communications network are described herein. In some aspects, an access point is configured to receive a request for relay connection and to transmit a message to at least one relay based on the received request for relay connection. The message comprises an instruction to transmit a setup response frame. A station is configured to transmit the request for relay connection to the access point and to select one of the at least one relay based on at least one setup response frame received from at least one of the at least one relay. The selected one of the at least one relay is configured to relay data packets between the station and the access point.

Abstract: Systems, methods, and devices for securely communicating data are described herein. In some aspects, a station is configured to communicate with an access point. A relay includes an uncontrolled port and a controlled port. The relay is configured to forward association, authentication, and secure relay setup frames between the station and the access point through the uncontrolled port. The relay is configured to forward data packets between the station and the access point through the uncontrolled port once the station establishes a relay relationship with the relay.

Abstract: A method includes creating a plurality of data fragments from a single data unit. The method also includes transmitting the plurality of data fragments to a receiver and receiving an acknowledgement from the receiver after transmitting a last data fragment of the plurality of data fragments. The method further includes selectively interpreting the acknowledgement as a multi-fragment acknowledgement (MFA) in response to a value of a fragment sequence number (FGSN) of the last data fragment. The MFA indicates receipt or non-receipt by the receiver of each of the plurality of data fragments of the single data unit.

Abstract: Systems, methods, and devices for reducing collisions in a wireless communications network are described herein. In some aspects, a receiver receives a paging message. The paging message includes an ordering and a multiplier. A processor determines a first wake-up time based on the ordering and the multiplier. The wireless device wakes up at the determined wake-up time. The wireless device receives data via the receiver.