Patent application number | Description | Published |
20080233919 | System and Method for Limiting Mobile Device Functionality. - The present invention relates to systems and methods that employ various mechanisms to selectively disable mobile device functionality. In general, mobile devices can be utilized to store personal and/or highly sensitive information such as bank account numbers, social security numbers, credit card numbers and the like. If the mobile device is lost or stolen, data stored within the device can be accessed by an unauthorized user; and, thus, any personal and/or highly sensitive information can be obtained. In order to mitigate unauthorized access, the subject invention provides a disabling component that communicates with the lost or stolen device to render data stored thereon inaccessible. Further, the data can be stored in local or remote locations to backup stored information, thereby creating a more robust and reliable method of storing information important to the device owner. These features provide enhancements over conventional mobile device security techniques. | 09-25-2008 |
20110149927 | 802.11 VERY HIGH THROUGHPUT PREAMBLE SIGNALING FIELD WITH LEGACY COMPATIBILITY - In accordance with various aspects of the disclosure, a method and apparatus are disclosed that includes aspects of a controller configured to create a VHT frame that is arranged to include information relating to a modulation and a coding scheme with which a data portion of the VHT frame is modulated and encoded; and a transmitter configured to transmit the VHT frame to one or more STAs. | 06-23-2011 |
20110150110 | Tone Count Selection - A tone selection module selects tones suitable for use in an orthogonal frequency division multiplexing (OFDM) data transmission device based on several constraints. These constraints include number of available tones, modulation type, and code rate. The OFDM device may use either wired or wireless transmission. | 06-23-2011 |
20110158337 | OFDM TRANSMITTER AND METHODS FOR REDUCING THE EFFECTS OF SEVERE INTERFERENCE WITH SYMBOL LOADING - Embodiments of an OFDM transmitter and method of reducing the effects of interference on subcarriers in an OFDM system by symbol loading are disclosed herein. A linear transformation is performed on a group of two or more input data symbols that are mapped to different signal dimensions to generate a corresponding two or more output data symbols. Each of the output data symbols has an increased number of constellation points. Each output data symbol is configured for transmission within one of the different signal dimensions. The linear transformation is configured so that each of the two or more output data symbols carry the information of each of the input data symbols of the group. This coding together of input data symbols that are mapped to different signal dimensions may provide improved reliability against fading and severe interference. The different signal dimensions may comprise a frequency, a time and/or a space dimension. | 06-30-2011 |
20110188518 | Coded bit padding - A method is described for adding coded bit padding for a orthogonal frequency division multiplexing (OFDM) data transmission device. | 08-04-2011 |
20110293029 | Tone count selection - In a device or system, a total tone count is determined or selected for modulating a data payload. Two or more code words are interleaved into the data payload, and the data payload is transmitted on a channel of the device or system. | 12-01-2011 |
20120045003 | COMMUNICATION STATION AND METHOD FOR EFFICIENTLY PROVIDING CHANNEL FEEDBACK FOR MIMO COMMUNICATIONS - Embodiments of a communication station and methods for efficiently providing channel feedback for MIMO communications over an OFDM channel are generally described herein. In some embodiments, receiving stations may perform a recursive differential quantization of channel information across time and/or frequency to generate quantized differential channel feedback. The quantized differential channel feedback from each receiving station may be used by a transmitting station to precode MIMO transmissions to one or more of the receiving stations. The quantized differential channel feedback may be either a quantized differential channel matrix or a quantized differential beamforming matrix. | 02-23-2012 |
20120243451 | OVERLAY FOR SCRAMBLER BITS IN A WIRELESS COMMUNICATION - By using an exclusive OR operation between two values to create a third value, a wireless communications device may communicate all three values to another device while only transmitting two of the values. In a particular embodiment, a bandwidth-static/dynamic parameter may be conveyed in a Request-to-Send by transmitting a length field and a scrambler seed to be used in the subsequent communication, with the bandwidth-static/dynamic parameter encoded into the scrambler seed. The receiving device may then derive the bandwidth-static/dynamic parameter by performing another XOR on portions of the two received parameters. | 09-27-2012 |
20120275446 | 802.11 VERY HIGH THROUGHPUT PREAMBLE SIGNALING FIELD WITH LEGACY COMPATIBILITY - In accordance with various aspects of the disclosure, a method and apparatus are disclosed that includes aspects of a controller configured to create a VHT frame that is arranged to include information relating to a modulation and a coding scheme with which a data portion of the VHT frame is modulated and encoded; and a transmitter configured to transmit the VHT frame to one or more STAs. | 11-01-2012 |
20130171941 | METHOD TO ENABLE WI-FI DIRECT USAGE IN RADAR BANDS - A method and system for allowing a client device to establish a direct communications session such as Wi-Fi Direct service using the 5 GHz band. In one embodiment, a client device first establishes a direct communications session, in the 2.4 GHz band with another client device, and then, based on the content used in that service, establishes a 5 GHz service if needed. | 07-04-2013 |
20130235714 | METHOD AND APPARATUS FOR A 1 MHZ LONG TRAINING FIELD DESIGN - An approach is provided for defining a 1 MHz preamble of a packet. The approach involves determining a preamble sequence of a packet, the preamble sequence having a determinable length. The approach also involves causing, at least in part, the preamble sequence to be divided into a predetermined number of blocks. The approach further involves causing, at least in part, a mathematical operation and a summation over the predetermined number of blocks and a corresponding number of received blocks. The approach also involves causing, at least in part, the summation to be maximized to determine the preamble sequence corresponds to one of a first bandwidth or a second bandwidth, the second bandwidth being greater than the first bandwidth, to determine a type of the packet. | 09-12-2013 |
20130243118 | MOBILE DEVICE TRANSMITTER AND METHODS FOR TRANSMITTING SIGNALS IN DIFFERENT SIGNAL DIMENSIONS FOR 3GPP LTE - Embodiments of a mobile device transmitter and methods for transmitting signals in different signal dimensions are generally disclosed herein. The mobile device transmitter comprises a mapper to map a block of two or more input modulation symbols to different signal dimensions comprising two or more spatial dimensions, and linear transform circuitry to perform a linear transform on the block of mapped input modulation symbols to generate a block of preceded complex-valued output symbols such that each output symbol carries some information of more than one input modulation symbol. The mobile device also comprises transmitter circuitry to generate time-domain signals from the blocks of precoded complex-valued output symbols for each of the spatial dimensions for transmission using the two or more antennas. The precoded complex-valued output symbols are mapped to different signal dimensions comprising at least different frequency dimensions prior to transmission. | 09-19-2013 |
20130272198 | METHODS AND ARRANGEMENTS FOR ORTHOGONAL TRAINING SEQUENCES IN WIRELESS NETWORKS - Logic may implement an orthogonal frequency division multiplexing (OFDM) system operating in the one gigahertz and lower frequency bands. Logic may detect new long training sequences that are differentially orthogonal to each other for a first bandwidth mode of operation such as a one megahertz mode as well as differentially orthogonal to half of the long training sequence for a second bandwidth mode of operation such as a two megahertz or greater mode. Logic may implement two or more long training sequences for the first bandwidth mode of operation to transmit information based upon the selection of the particular long training sequence for the transmission. Logic may implement a new acknowledgement packet comprising a short training sequence and a long training sequence without a signal field and without a payload. And logic may implement bandwidth detection logic to classify a transmission based upon orthogonal properties of the long training sequences. | 10-17-2013 |
20130314267 | MULTI-BAND SCANNING FOR RADAR DETECTION IN WI-FI SYSTEMS - Systems and methods are described herein for determining the presence of radar signals within the 5 GHz band using an active communications channel and a portion of the channels adjacent to the active channel. The access point radio may collect the bandwidth of the active and adjacent channels concurrently to avoid having to tune to each channel separately. Further, the radar scanning and a portion of the active channel processing may be completed simultaneously to improve access point utilization. | 11-28-2013 |
20130329815 | SYSTEMS AND METHODS FOR IMPLEMENTING IMPROVED FREQUENCY ESTIMATION - A system and method are provided for implementing improved frequency estimation for wireless communications in support of a broader set of use cases including outdoor use cases and use cases that involve lower power transmissions with reduced signal-to-noise ratios for receivers particularly in systems configured according to the pending IEEE 802.11 ah standard. These systems and methods provide greatly improved frequency estimation over that prescribed for devices operating according other IEEE 802.11 standards, including the frequency estimator conventionally used in systems operated according to the IEEE 802.11n standards, and the proposed frequency estimator specified for IEEE 802.11ac systems. The disclosed techniques facilitate improved frequency estimation schemes that reuse of a short training field (STF) stored in memory, employ joint STF-long training field (LTF) estimation, use portions of a guard interval (GI), and create of multiple-phase estimates, with different symbol separation to improve a signal-to-noise ratio of the frequency estimate. | 12-12-2013 |
20140003237 | SYSTEMS AND METHODS FOR OPERATING WIRELESS DEVICES IN DYNAMIC FREQUENCY SELECTION (DFS) BANDS | 01-02-2014 |
20140010324 | METHODS AND ARRANGEMENTS FOR SELECTING CHANNEL UPDATES IN WIRELESS NETWORKS - Pilot logic may determine based upon channel and phase information how to process pilot tones that shift locations every N symbols in an orthogonal frequency division multiplexing (OFDM) packet transmission. Pilot logic may determine a signal-to-noise ratio (SNR) for the channel to determine how to process the shifting pilot tones. Pilot logic may also determine channel and phase information updates such as channel state information and phase correction information from pilot tones. In situations of high SNR, logic may use channel estimates and phase rotations that are obtained from locations of the pilot tones for phase tracking and updating the equalizer. In situations of low SNR, logic may use the phase rotations for phase tracking and not update the equalizer during the OFDM transmission. Logic may also determine the presence or absence of a Doppler effect on the transmission and transmit a selection for N to an access point in response. | 01-09-2014 |
20140044112 | METHODS AND ARRANGEMENTS FOR BEAMFORMING REPORTS IN WIRELESS NETWORKS - Logic of an access point may transmit a null data packet for beamforming training and transmit a beamforming report poll to the first station on a user list before receiving a transmission from the first station on the user list. Logic may wait for a timeout period to determine whether the first station on the user list will respond to the null data packet prior to transmitting the beamforming report poll. Logic may receive from the first station an indication that the first station is a slow beamforming report responder. Logic may reorder the user list to position a fast beamforming responder as the first station. And logic of the station may determine that the station is unable to complete and transmit the report so the logic may wait to transmit the beamforming report in response to a subsequent beamforming report poll frame. | 02-13-2014 |
20140050254 | METHODS AND ARRANGEMENTS FOR CHANNEL UPDATES IN WIRELESS NETWORKS - Pilot logic may determine channel information updates such as channel state information and phase correction information from pilot tones that do not travel close to the DC tone or the band edge tones. Logic may skip channel updates and phase tracking from pilot tones that have traveled close to the DC tone or the edge tones. In other words, logic may process the shifting pilot tones except for the pilot tones located adjacent to the DC tone and the edge tones. Logic may use channel estimates and phase rotations that are obtained from previous locations of the pilot tones instead of pilot tones that are adjacent to the DC tone or the edge tones. Logic may access memory to store the channel information such as the phase correction information previously obtained and the channel state information previously obtained and derived from processing pilot tones at locations adjacent to the symbol indices next to the DC tone and the edge tones. | 02-20-2014 |
20140050255 | METHODS AND ARRANGEMENTS FOR CHANNEL UPDATES IN WIRELESS NETWORKS - Logic may calculate predicted phase rotations based upon more than one previously determined phase rotation. Logic may access memory to store and retrieve previously determined phase rotations to calculate predicted phase rotations. Logic may determine channel information updates such as channel state information and phase correction information from pilot tones that do not travel close to the direct current (DC) tone or the band edge (or guard) tones and replace the missing phase rotations with predicted phase rotations. Logic may skip phase tracking from pilot tones that have traveled close to the DC tone or the edge tones or that experience channel fading, which may result in a predicted phase rotation being more accurate than a phase rotation determined by processing the corresponding pilot tone. | 02-20-2014 |
20140050259 | METHODS AND ARRANGEMENTS FOR PHASE TRACKING IN WIRELESS NETWORKS - Logic may determine phase correction information from pilot tones. Logic may determine phase correction information from some of the pilot locations. Logic may process the shifting pilot tones for less than all of the pilot tones. Logic may process pilot tones at any location within orthogonal frequency division multiplexing (OFDM) packet. Logic may determine to process only pilot tones at the even or odd symbol indices or subcarriers. And logic may transmit a packet with a frame with a capabilities information field comprising an indication that a receiver may can process shifting pilot tones for phase tracking. | 02-20-2014 |
20140056209 | METHODS AND ARRANGEMENTS TO RELAY PACKETS VIA WI-FI DIRECT - Logic may enable client devices or access points to relay medium access control (MAC) frames through a Wireless Fidelity (Wi-Fi) Direct network such as a network of Peer-to-Peer (P2P) connections to extend the wireless range of the devices or access points beyond the transmission range of the individual devices or access points. Logic may extend the range of IEEE 802.11 devices, such as IEEE 802.11ah devices, by allowing a station in the middle of two stations to serve as a relay station using the Wi-Fi Direct technology. Logic may enable relaying to avoid a full mesh technology such as is defined in IEEE 802.11s, since the full mesh technology may contain too many features that are not required for a simple or a static network configuration of such embodiments. | 02-27-2014 |
20140098724 | METHODS AND ARRANGEMENTS FOR FREQUENCY SELECTIVE TRANSMISSION - Logic may comprise hardware and/or code to select a narrow band from a wider channel bandwidth. Logic of communications between devices may select, e.g., a 1 or 2 MHz sub-channel from a wider channel bandwidth such as 4, 8, and 16 MHz and transmit packets on the selected 1 or 2 MHz channel. For instance, a first device may comprise an access point and a second device may comprise a station such as a low power sensor or a meter that may, e.g., operate on battery power. Logic of the devices may facilitate a frequency selective transmission scheme. Logic of the access point may transmit sounding packets or control frames across the sub-channels of the wide bandwidth channel, facilitating selection by the stations of a sub-channel and subsequent communications on the sub-channel between the access point and the station. | 04-10-2014 |
20140105123 | TECHNIQUES TO MANAGE DWELL TIMES FOR PILOT ROTATION - Techniques to manage dwell times for pilot rotation are described. An apparatus may comprise a memory configured to store a data structure with a set of modulation and coding schemes (MCS) available to an orthogonal frequency division multiplexing (OFDM) system, each MCS having an associated pilot dwell time. The apparatus may further comprise a processor circuit coupled to the memory, the processor circuit configured to identify a MCS to communicate a packet using multiple subcarriers of the OFDM system, and retrieve a pilot dwell time associated with the MCS from the memory, the pilot dwell time to indicate when to shift a pilot tone between subcarriers of the multiple subcarriers during communication of the packet. Other embodiments are described and claimed. | 04-17-2014 |
20140112246 | METHODS AND ARRANGEMENTS FOR FREQUENCY SELECTIVE TRANSMISSION - Logic such as hardware and/or code to narrow available sub-channels in frequency selective transmission communications in which a station selects a narrow band from a wider channel bandwidth. A frequency selective transmission scheme for communications devices may select a 1 or 2 MHz channel from a wider channel bandwidth (e.g., 4, 8, 16 MHz) that consists of a number of 1 or 2 MHz sub-channels and transmitting packets on the selected sub-channel. The access point may narrow the number of sub-channels available for selection by stations. Stations may narrow the number of sub-channels. Both the AP and the stations may operate to narrow the number of sub-channels. A medium access control sub-layer protocol common to the communications devices may facilitate a frequency selective transmission scheme. | 04-24-2014 |
20140119280 | METHODS AND ARRANGEMENTS TO MITIGATE COLLISIONS IN WIRELESS NETWORKS BY ENABLING COEXISTENCE OF DISPARATE BANDWIDTHS - Systems, devices, and methods for mitigating collisions between wireless transmissions operating at different bandwidths are disclosed. As such, a wireless device operating at a predefined bandwidth includes a transceiver that receives a signal across a wireless channel, a filter that generates a band-limited filtered signal at the predefined bandwidth of the wireless device, a correlating mechanism that correlates the band-limited filtered signal with a delayed, conjugated version of the band-limited filtered signal, logic that performs a moving average of the correlated filtered signals to determine correlation peaks, and logic configured to compare the correlation peaks with a predetermined threshold. With this configuration, if the correlation peaks are greater than the predetermined threshold, the received signal is determined to operate at a wider bandwidth than the predefined bandwidth of the wireless device, and the wireless device defers accessing the wireless channel to transmit until a predetermined time interval. | 05-01-2014 |
20140126385 | Techniques to Update a Wireless Communication Channel Estimation - Examples are disclosed for updating a wireless communication channel estimation. In some examples, a packet may be transmitted or received via a communication channel, the packet having one or more pilot signals that may shift between subcarrier frequencies based on a predetermined first variable associated with a first time duration. A second variable associated with a second time duration may be determined by the receiver of the data packet. The second variable may enable a receiver of the data packet to decide how many pilot signals may be used to update an initial channel estimation for the communication channel. Other examples are described and claimed. | 05-08-2014 |
20140140357 | SYSTEMS, METHODS, AND APPARATUS FOR A LOW RATE PHY STRUCTURE - Certain embodiments of the invention may include systems, methods, and apparatus for a low rate PHY structure. According to an example embodiment of the invention, a method is provided for generating a low rate PHY structure with low overhead. The method may include generating a preamble comprising one or more training fields; generating a data field; grouping the preamble and the data field into a low rate PHY structure; and converting the low rate PHY structure for wireless transmission over a hardware transmission medium. | 05-22-2014 |
20140146722 | METHODS AND ARRANGEMENTS TO DECODE COMMUNICATIONS - Embodiments may comprise logic such as hardware and/or code to reduce power consumption by, e.g., a device such as a station or relay by implementing prediction logic to decode and determine whether a communication affects the operation of the device. Some embodiments may comprise logic to receive at least a portion of a header of a frame from a physical layer and begin to decode the portion of the header of the frame without first checking the correctness of the value in the frame check sequence field. In many embodiments, prediction logic may determine whether the frame could have an impact on the operation of the device. For circumstances in which the prediction logic determines that the frame will not have an impact, the MAC logic may terminate processing, receipt, and decoding of the frame and enter the device into a low power consumption state. | 05-29-2014 |
20140169245 | METHODS AND ARRANGEMENTS FOR LOW POWER WIRELESS NETWORKS - Embodiments may comprise an orthogonal frequency division multiplexing (OFDM) system operating in the 1 GHz and lower frequency bands. In many embodiments, physical layer logic may implement a new preamble structure with a new signal field. Embodiments may store the preamble structure and/or a preamble based upon the new preamble structure on a machine-accessible medium. Some embodiments may generate and transmit a communication with the new preamble structure. Further embodiments may receive and detect communications with the new preamble structure. | 06-19-2014 |
20140177514 | Techniques for Transmitting Data via Relay Communication Links - Examples are disclosed for transmitting data via a relay communication links. In some examples, a wireless device may receive a packet having a physical layer convergence protocol (PLCP) header that indicates whether the packet also includes a relay header placed before a media access controller header. The packet may be dropped or the relay header may be decoded based on a determination of whether the PLCP header indicates that the packet includes the relay header. Other examples are described and claimed. | 06-26-2014 |
20140185501 | METHODS AND ARRANGEMENTS TO COORDINATE COMMUNICATIONS IN A WIRELESS NETWORK - Logic may comprise hardware and/or code to coordinate communications of wireless communications devices to reduce power consumption by stations. Logic may coordinate communications in an access point. Logic may generate and transmit a wake frame from the access point to the station to wake the receive circuitry of the station. Logic of the station may wake the receive circuitry from an idle mode, which may be a less linear and less sensitive mode, to a receiver (RX) active state, which is a high linear and high sensitivity mode. Once the receiver circuitry enters the RX active state, the station is ready to receive a transmission. Logic may implement the wake frame as a medium access control frame or as a null data packet, physical layer frame. | 07-03-2014 |
20140185502 | METHODS AND ARRANGEMENTS FOR A LOW POWER DEVICE IN WIRELESS NETWORKS - Some new low power architecture devices may, e.g., be associated with in a new device category in the IEEE 802.11ah Standard for devices with low power architecture. Some new low power architecture devices may only to support a subset of modulation and coding schemes (MCSs). Some new low power architecture devices negotiate the use of the subset of MCSs with an access point. Further new low power architecture devices address power consumption through modifications to the architecture of the new low power device. For instance, many new low power architecture devices remove, modify or bypass portions of the front-end transmitter circuitry and/or the front-end receiver circuitry such as a power amplifier, a low noise amplifier, predistortion circuitry, digital-to-analog and analog-to-digital converter resolutions, and stages of filtering. | 07-03-2014 |
20140185656 | TECHNIQUES TO ACCOMMODATE DIFFERENT CLASSES OF DEVICES IN A WIRELESS NETWORK - An apparatus, a method and a machine-readable storage medium to accommodate both high function and low cost wireless devices in a wireless network. An exemplary apparatus includes a receiver to wirelessly receive a first packet comprising first and second shifting pilot signals amidst first data symbols transmitted via multiple subcarriers in symbol sets; a transmitter to wireless transmit a second packet; and logic to track a phase shift using the first and second shifting pilot signals, to configure the receiver to compensate for the shift in phase, to refrain from using reception of the first and second shifting pilot signals to update an initial channel estimate derived from a preamble of the first packet, and to transmit third and fourth shifting pilot signals amidst second data symbols of the second packet. | 07-03-2014 |
20140185662 | METHODS AND ARRANGEMENTS FOR PHASE TRACKING FOR MULTI-MODE OPERATION IN WIRELESS NETWORKS - Logic may comprise a single phase tracking implementation for all bandwidths of operation and the logic may adaptively change pre-defined and stored track parameters if the receiving packet is 1 MHz bandwidth. Logic may detect a packet and long training fields before performing a 1 MHz classification. Logic may auto-detect 1 MHz bandwidth transmissions by a property of the long training field sequences. Logic may auto-detect 1 MHz bandwidth transmissions by detecting a Binary Phase Shift Keying (BPSK) modulated first signal field symbol rather than the Quadrature Binary Phase Shift Keying (QBPSK) associated with the 2 MHz or greater bandwidth transmissions. Logic may perform an algorithm to determine an estimated phase correction value for a given orthogonal frequency division multiplexing symbol and several embodiments integrate this value with an intercept multiplier that may be 0.2 for 1 MHz transmissions and, e.g., 0.5 for 2 MHz or greater bandwidth communication. | 07-03-2014 |
20140185695 | METHODS AND ARRANGEMENTS FOR COMMUNICATIONS IN LOW POWER WIRELESS NETWORKS - Embodiments may comprise an orthogonal frequency division multiplexing (OFDM) system operating in the 1 GHz and lower frequency bands. In many embodiments, the physical layer logic may implement repetition logic to repeat portions of the data streams to increase the ability of a receiving device to detect and decode the data streams. In some embodiments, the repetition logic may comprise a preamble repeater to repeat the training and/or signal fields. In further embodiments, the repetition logic may comprise a payload repeater to repeat the payload one or more times. Other embodiments comprise a receiving device comprising a correlator to correlate the repeated preamble symbols to detect a communication from a transmitting device. The receiving device may also comprise correction logic to correct data streams from the communications signal based upon repetitions of the payload in the data streams. | 07-03-2014 |
20140192713 | METHODS AND ARRANGEMENTS FOR SHORT BEACON FRAMES IN WIRELESS NETWORKS - Embodiments provide a new short beacon frame format and its operation with full beacon frame transmissions for wireless communications devices. Many embodiments comprise a medium access control (MAC) sublayer logic to build frames comprising the short beacon frame for a first communications device. In some embodiments, the MAC sublayer may determine a frame control field comprising a type field indicative of an extension frame and a subtype indicative of a short beacon. In further embodiments, the frame control field may comprise a service set identifier (SSID) control field, and a reserved field. Some embodiments may store the short beacon frame or frame format in memory, in logic, or in another manner that facilitates transmission of the short beacon frames. Some embodiments may receive and detect communications with the short beacon frames. Further embodiments may generate and transmit a communication with the short beacon frames. | 07-10-2014 |
20140192820 | METHODS AND ARRANGEMENTS TO MITIGATE COLLISIONS IN WIRELESS NETWORKS - Logic for collision mitigation between transmissions of wireless transmitters and receivers operating at different bandwidths. Logic of the receivers may be capable of receiving and detecting signals transmitted at narrower bandwidths. In several embodiments, the receivers comprise a clear channel assessment logic that implements a guard interval (or cyclic prefix) detector to detect transmissions at narrower bandwidths. For instance, a two MegaHertz (MHz) bandwidth receiver may implement a guard interval detector to detect 1 MHz bandwidth signals and a 16M Hz bandwidth receiver may implement logic to detect one or more 1 MHz bandwidth signals and any other combination of, e.g., 1, 2, 4, 8 MHz bandwidth signals. In many embodiments, the guard interval detector may be implemented to detect guard intervals on a channel designated as a primary channel as well as on one or more non-primary channels. | 07-10-2014 |
20140192823 | METHODS, SYSTEMS AND APPARATUSES FOR DIRECT DATA FRAMES - Generally, arrangements for enabling direct medium access control (MAC) sublayer data frames are described herein. Embodiments may comprise logic such as hardware and/or code to reduce the size of a packet by determining a frame in the MAC sublayer, inserting the frame in the signal field of a preamble to transmit, transmitting the direct MAC data frame as a packet, communicating that the packet is a direct MAC data frame, and parsing and interpreting the direct MAC data frame at the receiving device. Embodiments may determine and transmit and/or receive and interpret direct MAC data frames. | 07-10-2014 |
20140198739 | METHODS AND ARRANGEMENTS FOR AN ACKNOWLEDGEMENT IN WIRELESS NETWORKS - Embodiments may comprise physical layer logic to implement a new, short acknowledgement. Embodiments may store the short acknowledgement on a machine-accessible medium. Some embodiments may determine and transmit a communication with the short acknowledgement. Further embodiments may receive and detect communications with the short acknowledgement. The short acknowledgement may reduce power consumption and reduce on-the-air time. | 07-17-2014 |
20140198780 | METHODS, SYSTEMS AND APPARATUSES TO ENABLE SHORT FRAMES - Generally, embodiments to enable short frames are described herein. Embodiments may comprise logic such as hardware and/or code to reduce the size of a packet by determining a short frame, transmitting the short frame, communicating that the frame is a short frame and interpreting the short frame at the receiving device. Embodiments may determine and transmit and/or receive and interpret short frames. | 07-17-2014 |
20140198805 | METHODS AND ARRANGEMENTS FOR EXTENSION FRAMES IN WIRELESS NETWORKS - Embodiments provide a frame extension to generate short frames with short medium access control (MAC) headers to facilitate transmissions for wireless communications devices. Many embodiments comprise MAC sublayer logic to build short frames. In some embodiments, the MAC sublayer may determine a short MAC header comprising a type field indicative of an extension frame; a subtype indicative of a short management, data, or control frame; and a frame extension indicative of a particular type of short management, data, or control frame. Some embodiments may store the short frames or short frame formats in memory, in logic, or in another manner that facilitates transmission of the short frames. Some embodiments may receive and detect communications with the short frames. Further embodiments may generate and transmit a communication with the short frames. | 07-17-2014 |
20140204837 | METHODS AND ARRANGEMENTS FOR CHANNEL ACCESS IN WIRELESS NETWORKS - Some embodiments provide a normal rate preamble detector to detect a signal transmitted in accordance with a first set of modulation and coding schemes and a low rate preamble detector to detect a signal transmitted in accordance with a second set of modulation and coding schemes. Embodiments may comprise channel traffic logic to determine a traffic indicator indicative of traffic on a communications channel. In many embodiments, channel traffic logic may comprise logic to determine a duty cycle of communications to determine the traffic indicator for the channel. In several embodiments, channel traffic logic may comprise logic to determine channel occupancy to determine the traffic indicator. Based upon the traffic indicator, channel traffic logic may determine whether to disable the low rate preamble detector. Further embodiments comprise logic to design a station, determining whether to include a low rate preamble detector based upon parameters related to channel traffic. | 07-24-2014 |
20140204960 | METHODS AND ARRANGEMENTS FOR TRAFFIC INDICATION MAPPING IN WIRELESS NETWORKS - Embodiments may implement a new hierarchical data structure for traffic indication mapping to facilitate transmissions for wireless communications devices. Many embodiments comprise MAC sublayer logic to generate and transmit management frames such as beacon frames with a partial virtual bitmap based upon the hierarchical data structure for traffic indication mapping. In some embodiments, the MAC sublayer logic may store the traffic indication map and/or the traffic indication map structure in memory, in logic, or in another manner that facilitates transmission of the frames. Some embodiments may receive, detect, and decode communications with frames comprising the partial virtual bitmap based upon the hierarchical data structure. In some embodiments, indications of buffered data for pages, super-blocks, blocks, sub-blocks, and/or stations may be inverted. In several embodiments, a new association identifier (AID) structure is defined for the new hierarchical data structure for traffic indication mapping. | 07-24-2014 |
20140254469 | MILLIMETER-WAVE RELAY DEVICE WITH BOUNDED DELAY AND METHOD FOR RETRANSMISSION OF SYMBOLS - Embodiments of a wireless station to operate as a per-symbol relay device and method for retransmission of symbols between client devices and a master device using millimeter-wave links is generally disclosed herein. In some embodiments, the relay device may receive one or more of independent symbol streams from the master device. Each independent symbol stream may comprise packets that include groups of one or more symbols. Each group within a packet may be destined for a different one of the client devices. The relay device may separately decode each symbol or group of symbols to generate an independent stream of symbols for retransmission to the client devices using beamforming. The relay device may be arranged to receive, decode, and retransmit each symbol or group of symbols within a delay that is bounded by the number of symbols in the group. | 09-11-2014 |
20140269362 | Techniques to Update a Wireless Communication Channel Estimation - An apparatus, a method and one or more tangible computer-readable non-transitory storage media. The apparatus comprises a processor and a receive module configured to be executed by the processor to receive a data packet via a wireless communication channel, the packet including one or more pilot signals assigned to one or more corresponding subcarrier frequencies of the packet, the one or more pilot signals arranged to sweep through at least a portion of the plurality of subcarrier frequencies as a function of time. The apparatus further includes a channel estimator module configured to be executed by the processor to determine an initial channel estimation for the communication channel, and to further update a channel estimation for the communication channel using at least a portion of the pilot signals of the packet based on channel conditions. | 09-18-2014 |
20140269770 | WIRELESS DEVICE AND METHOD FOR LOW POWER AND LOW DATA RATE OPERATION - Embodiments of a wireless device and method for transmitting a packet comprising one or more orthogonal frequency division multiplexed (OFDM) transmission symbols are generally described herein. In some embodiments, the wireless device may be configured to map data to active tones and map zeroes to nulled tones of a set of OFDM tones to generate an OFDM symbol comprising both the active and the nulled tones. The number of active and nulled tones may be based on a nulling factor. The OFDM symbol may be down-clocked to generate an OFDM transmission symbol for transmission over a reduced transmission bandwidth. Accordingly, low power may be used for very low data rate transmissions, which may be suitable for sensor devices. | 09-18-2014 |
20140321564 | TECHNIQUES TO MANAGE DWELL TIMES FOR PILOT ROTATION - Techniques to manage dwell times for pilot rotation are described. An apparatus may comprise a memory configured to store a data structure with a set of modulation and coding schemes (MCS) available to an orthogonal frequency division multiplexing (OFDM) system, each MCS having an associated pilot dwell time. The apparatus may further comprise a processor circuit coupled to the memory, the processor circuit configured to identify a MCS to communicate a packet using multiple subcarriers of the OFDM system, and retrieve a pilot dwell time associated with the MCS from the memory, the pilot dwell time to indicate when to shift a pilot tone between subcarriers of the multiple subcarriers during communication of the packet. Other embodiments are described and claimed. | 10-30-2014 |
20150010098 | METHODS AND ARRANGEMENTS FOR COMMUNICATIONS IN LOW POWER WIRELESS NETWORKS - Embodiments may comprise an orthogonal frequency division multiplexing (OFDM) system operating in the 1 GHz and lower frequency bands. In many embodiments, the physical layer logic may implement orthogonal frequency division multiplexing symbols encoded with 32 sub-carriers such as twenty data sub-carriers, four pilot sub-carriers, seven guard sub-carriers, and one direct current (DC) sub-carrier. Many embodiments may transform the orthogonal frequency division multiplexing symbols between frequency and time domains with a 32-point, fast Fourier transform or inverse fast Fourier transform. Some embodiments may up-convert and transmit a communication signal with the orthogonal frequency division multiplexing symbols at one megahertz. Further embodiments may receive and detect communications signal with the orthogonal frequency division multiplexing symbols at one megahertz. | 01-08-2015 |
20150017919 | METHOD TO ENABLE WI-FI DIRECT USAGE IN RADAR BANDS - A method and system for allowing a client device to establish a direct communications session such as Wi-Fi Direct service using the 5 GHz band. In one embodiment, a client device first establishes a direct communications session, in the 2.4 GHz band with another client device, and then, based on the content used in that service, establishes a 5 GHz service if needed. | 01-15-2015 |
20150029933 | METHODS AND ARRANGEMENTS FOR TRAFFIC INDICATION MAPPING IN WIRELESS NETWORKS - Embodiments may implement a new hierarchical data structure for traffic indication mapping to facilitate transmissions for wireless communications devices. Many embodiments comprise MAC sublayer logic to generate and transmit management frames such as beacon frames with a partial virtual bitmap based upon the hierarchical data structure for traffic indication mapping. In some embodiments, the MAC sublayer logic may store the traffic indication map and/or the traffic indication map structure in memory, in logic, or in another manner that facilitates transmission of the frames. Some embodiments may receive, detect, and decode communications with frames comprising the partial virtual bitmap based upon the hierarchical data structure. In some embodiments, indications of buffered data for pages, blocks, sub-blocks, and/or stations may be inverted. In several embodiments, a new association identifier (AID) structure is defined for the new hierarchical data structure for traffic indication mapping. | 01-29-2015 |
20150036567 | WIRELESS DEVICE AND METHOD FOR WIRELESS CHANNEL ACCESS - Disclosed in some examples is a method of channel access by a wireless device in a wireless network by determining whether there is network traffic associated with a preamble of a first type and whether there is network traffic associated with a preamble of a second type, wherein the wireless device is not capable of decoding the preamble of the second type, and wherein determining that there is network work traffic associated with a preamble of the second type includes determining that an energy level of the channel is above a threshold for a period of time, the first and second preamble types being different lengths; and sending a packet with a preamble of the first type, responsive to determining that no network traffic is detected associated with the preamble of the second type or network traffic associated with a preamble of the first type for the period of time. | 02-05-2015 |
20150085946 | METHODS AND ARRANGEMENTS FOR COMMUNICATIONS IN LOW POWER WIRELESS NETWORKS - Embodiments may comprise an orthogonal frequency division multiplexing (OFDM) system operating in the 1 GHz and lower frequency bands. In many embodiments, the physical layer logic may implement orthogonal frequency division multiplexing symbols encoded with 32 sub-carriers such as twenty data sub-carriers, four pilot sub-carriers, seven guard sub-carriers, and one direct current (DC) sub-carrier. Many embodiments may transform the orthogonal frequency division multiplexing symbols between frequency and time domains with a 32-point, fast Fourier transform or inverse fast Fourier transform. Some embodiments may up-convert and transmit a communication signal with the orthogonal frequency division multiplexing symbols at one megahertz. Further embodiments may receive and detect communications signal with the orthogonal frequency division multiplexing symbols at one megahertz. | 03-26-2015 |