Abstract: Systems, methods, and devices for multicast communications including access identifiers are described herein. In some aspects, a fixed mapping from a multicast device identifier (e.g., multicast MAC address, multicast IP address) to a multicast access identifier is provided. In some aspects, a device may transmit a request to join a multicast group identified by a multicast access identifier. In some aspects, a device may receive an invitation to join a multicast group identified by a multicast access identifier.

Abstract: A method includes sending a sequence number acknowledgement (SN-ACK) from a first device to a second device. The SN-ACK identifies a last consecutively correctly received data unit and includes a retry bit indicating whether at least one data unit of the plurality of data units was received by the first device subsequent to the last consecutively correctly received data unit. The method also includes, when the retry bit has a first value, sending a block acknowledgement (BA) after sending the SN-ACK. The BA includes a bitmap, where each particular bit of the bitmap indicates whether a corresponding data unit was correctly received. When the retry bit has a second value and one or more of the plurality of data units were incorrectly received by the first device, the first device receives a retransmission of one or more data units without sending the BA to the second device.

Abstract: One aspect of the disclosure provides a method for wireless communication. The method includes sending a modulation and coding scheme request to an access point. The modulation and coding scheme request is sent using a first physical layer preamble frame. The modulation and coding scheme request includes an identifier associated with the access point. The method further includes receiving at a station a modulation and coding scheme feedback response from the access point in response to sending the modulation and coding scheme request. The modulation and coding scheme feedback response is received as a second physical layer preamble frame. In addition, the method includes determining a modulation and coding scheme based on the modulation and coding scheme feedback response. Moreover, the method includes transmitting data to the access point using the identified modulation and coding scheme.

Abstract: A method includes assigning a flow identifier to a flow that includes a plurality of packets. The method also includes generating a head packet of the plurality of packets. The head packet includes one or more header information fields that are associated with the flow identifier. The method further includes generating at least one data packet of the plurality of packets. The at least one data packet includes packet specific information and the flow identifier instead of the one or more header information fields. The method further includes transmitting the head packet. The method further includes, in response to detecting a successful receipt of the head packet, transmitting the at least one data packet.

Abstract: A method for reduced overhead paging by an access point is described. The method includes assigning at least one paging identifier to at least one station. The method also includes partitioning a paging identifier space into paging identifier sets. The method further includes generating a paging message based on at least one of the paging identifier sets and the at least one paging identifier. The method additionally includes sending the paging message.

Abstract: Systems, methods, and devices for communicating packets having a plurality of types are described herein. In some aspects, the packets include a compressed MAC header. In some aspects the packets include an acknowledgment (ACK) frame. The fields included in a particular packet type may be based on the type of information to be communicated to the receiving device.

Abstract: Systems, methods, and devices for communicating packets having a plurality of types are described herein. In some aspects, the packets include a compressed MAC header. In some aspects the packets include an acknowledgment (ACK) frame. The fields included in a particular packet type may be based on the type of information to be communicated to the receiving device.

Abstract: A system is provided for optimizing throughput in a communication system. During operation, the system receives, at a first antenna, estimated channel state information (CSI) at least one channel between the first antenna and at least one second antenna. The system obtains antenna correlation information associated with the first antenna and the second antenna, respectively. The system further calculates a set of noise terms associated with random noise for the at least one channel, and optimizes a configuration of beamformers for the first antenna and the at least one second antenna that maximizes a throughput of all antennas, in accordance with the estimated CSI, the obtained antenna correlation information, and the noise terms.

Abstract: Methods and apparatus provide for channel selection within a wireless network. A multi-channel wireless access point may select a channel for a wireless device requesting data or voice service based on the transmit times of each channel supported by the multi-channel wireless access point. The transmit times may be based on the physical rates of the devices assigned to each channel. The channel may also be selected based on the quality of service requested by the wireless device, the medium occupancy of each channel, or the number of wireless devices assigned to each channel. Alternatively the wireless device may select the channel for assignment based on channel statistics information provided by the multi-channel wireless access point. This information may be provided through one or more beacon signals, or supplied in response to a request for the information from a wireless device.

Abstract: A method for operating a controller of a multiple input, multiple output communications system includes formulating an objective function according to a resource allocation for a user equipment (UE) and a mean square error expression, and updating the objective function to generate an updated resource allocation for the UE, a transmit beamforming vector to precode a transmission to the UE, and a receive beamforming vector to adjust a receiver to receive the precoded transmission. The method also includes transmitting allocation information about the resource allocation for the UE and the transmit beamforming vector to a communications controller serving the UE.

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: 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: An electrical card (100) includes an insulative frame (1) having a pair of detachable side bars (112) spaced from each other and a transverse bar (116) assembled onto the side bars to interconnect the side bars; a detachable upper cover (12) attached to a rear end of the frame; an upper shell (2) and a lower shell (3) mounted to an upper side and a lower side of the side bars respectively; a detachable lower cover (4) attached to the lower shell and disposed beneath the upper cover; a circuit board (5) supported by the frame and located between the frame and the upper shell; and an electrical connector (6) attached to a front end of the frame and electrically connected to the circuit board.

Abstract: A memory card (100) includes a main body portion (1) and a rotatable portion (2) connected by a pair of hinges (3) to rotate around an axis extending across a width of the memory card. A conductive member (12) includes a base (121) retained in the main body portion (1) to form a SD card interface and an extension (122) extending beyond the main body portion to form a USB plug interface. The rotatable portion has a slot (2117) and a slider (22) movably received in the slot. The slider (22) includes a locking projection (2215) holding a distal end (123) of the extension at a closed position and sliding away the distal end to expose the second interface at an opened position.

Abstract: An electrical connector (100) for mating with a corresponding plug (200) includes a dielectric housing (1) defining two contact areas (15) along an up to down direction. An outer shield (3) encloses the dielectric housing. A plurality of contacts (2) are retained in the contact areas. An inner shield (4) are mounted between two contact areas and comprises a pair of spring arms (42) extending into the contact area to lock with the plug and a resilient strip (43) extending into the contact areas to abutting against an outer side of the plug.

Abstract: A memory card (100) includes a main body portion (1) and a rotatable portion (2) connected by a pair of hinges (3) to rotate around an axis extending across a width of the memory card. A conductive member (12) includes a base (121) retained in the main body portion (1) to form a SD card interface and an extension (122) extending beyond the main body portion to form a USB plug interface. The rotatable portion has a pair of slots (2117), a pair of coiled springs (24) and a slider (22) movably received in the slots. The slider (22) includes a locking projection (2215) mating with a distal end (123) of the extension at a closed position and abutting against the distal end to expose the second interface at an opened position.

Abstract: An electrical connector (100) for mating with a corresponding plug (200) includes a dielectric housing (1) defining two contact areas (15) along an up to down direction. An outer shield (3) encloses the dielectric housing. A plurality of contacts (2) are retained in the contact areas. An inner shield (4) are mounted between two contact areas and comprises a pair of spring arms (42) extending into the contact area to lock with the plug and a resilient strip (43) extending into the contact areas to abutting against an outer side of the plug.

Abstract: A PC card includes a pair of shells, a printed circuit board interposed between the shells, an insulative frame supporting the printed circuit board, a top cover, and a bottom cover engaging with the top cover. The insulative frame includes a pair of longitudinal rails and the top cover is connected with rear ends of the rails. An enforcement mechanism is arranged on front ends of the top cover and the bottom cover for fastening the bottom cover to the top cover. The enforcement mechanism includes a protrusion and a recess mating with each other.