Patent application number | Description | Published |
20080205352 | COMMUNICATION BETWEEN OVERLAPPING WRAN CELLS WORKING IN DIFFERENT CHANNELS - A common control channel for base station (“BS”)/consumer premise equipment (“CPE”) communication in areas of overlapping coverage by wireless regional area network (“WRAN”) cells operating on different working channels is disclosed. A common control channel is selected from among the various working channels sensed in each of a plurality of overlapping WRAN cells so as to enable BS/CPE and BS/BS communication. Once chosen, each CPE within the overlapping area communicates with the controlling BS via an enhanced coexistence beacon protocol messages. These messages include timing and other synchronization information. | 08-28-2008 |
20080205487 | CLEAN SENSING FOR DYNAMIC FREQUENCY HOPPING IN DYNAMIC SPECTRUM ACCESS NETWORKS - Clean and reliable channel sensing during dynamic frequency hopping over a plurality of overlapping wireless regional area network (WRAN) cells is conducted using a minimum number of channels. By coordinating a phase-shift of the operation periods of each WRAN cell over a minimum number of working channels, interruption-free communication and data transmission for each of the WRAN cells as well as interference-free channel sensing can be achieved. | 08-28-2008 |
20080207204 | RADIO FREQUENCY ARCHITECTURE FOR SPECTRUM ACCESS NETWORKS - Radio frequency (RF) architectures for spectrum access networks are provided. Embodiments of the invention generally provide a radio frequency (RF) architecture for customer premise equipment (CPE) for use in, for example, IEEE 802.22 wireless regional area networks (WRANs). In some embodiments, the CPE RF architecture includes two receive chains with a directional antenna and an omni-directional antenna, respectively. The CPE RF architecture facilitates opportunistic out-of-band spectrum sensing and WRAN signal receiving that are performed in parallel with data transmission. | 08-28-2008 |
20080207215 | FAIR CHANNEL USE IN A WIRELESS AREA NETWORK - Fair usage of working channels in a wireless network is disclosed. A base station associated with a cell within a wireless community monitors the congestion of the working channel of neighboring communities. Upon determining that the congestion of the working channel of a neighboring community is less than that of its existing working channel, the base station initiates a switch to the neighboring community's working channel. Upon joining the new community, the frame structure and other networking parameters and attributes are adjusted. | 08-28-2008 |
20090003298 | SIX-ADDRESS SCHEME FOR MULTIPLE HOP FORWARDING IN WIRELESS MESH NETWORKS - A six field address scheme identifies both the originating point and the endpoint of a data frame enabling multiple hop forwarding through a plurality of intermediate mesh points in a wireless mesh network. Data frames originating or ending at a point outside of the wireless mesh network access the wireless network at a mesh access point using a legacy address scheme. The legacy address schemes are converted to a six address scheme using a proxy address table at the access point. Each mesh access point includes not only a routing table but a proxy address table as well as enabling the mesh access point, and/or mesh portal points, to convert address schemes having less than six address fields to the six field format. Subsequent to the conversion, mesh points within the wireless mesh network need only the routing table to facilitate the forwarding of the data frame. | 01-01-2009 |
20090213776 | BROADCAST/MULTICAST COLLISION FREE FRAME TRANSMISSION - A protocol for collision avoidance in inter and intra basic service set broadcast/multicast communication in a wireless network is disclosed. An access point reserves a broadcast transmission time and conveys that reservation to each of its associated stations. Using a beacon or an action frame, the transmission reservation time is sent to all stations and other neighboring access points within range of the primary access point. Upon receiving the broadcast transmission time reservation, each station associated with the reserving access point and any neighboring access points set their network allocation vector thus preventing frame transmission or reception during the now reserved transmission time. | 08-27-2009 |
20090231995 | TUNNELED DIRECT LINK SETUP COLLISION RESOLUTION IN A WIRELESS LOCAL AREA NETWORK - Collisions between tunneled direct link setup (“TDLS”) requests are resolved by associating each request with a priority value. Upon issuing a TDLS request the encapsulated frame is associated with a priority value. When a station, which is waiting for a response from a recently issued TDLS request, receives a TDLS request from another station, a collision occurs. The collision is resolved by comparing the priority value associated with the TDLS request initiated by the station and the TDLS request received. The TDLS request with the higher priority value is pursued while the TDLS request with the lower priority value is ignored. The priority value can be based on the sending station's MAC address or other value which can differentiate the TDLS requests. | 09-17-2009 |
20100091898 | RECOVERY OF DATA FROM A MULTI CARRIER SIGNAL - In an embodiment, a multi-carrier signal (e.g., an OFDM signal) is received over a channel. First indicators of interference and channel response at a carrier frequency of the signal are determined and compared. If the first indicator of the interference has a relationship to the first indicator of the channel response, then a data value transmitted at the carrier frequency is recovered from a data value received at the carrier frequency according to a first algorithm. If, however, the first indicator of the interference does not have a first relationship to the first indicator of the channel response, then second indicators of interference and the channel response at the carrier frequency are determined and compared. If the second indicator of the interference has a second relationship to the second indicator of the channel response, then the data value transmitted at the carrier frequency is recovered from the data value received at the carrier frequency according to a second algorithm. Because first and second data-recovery algorithms may be faster than a conventional data-recovery algorithm, recovering one or more data values with the first or second algorithms may increase the speed at which data is recovered from a multicarrier signal as compared to using a conventional data-recovery algorithm exclusively. | 04-15-2010 |
20100098198 | RECOVERY OF DATA FROM A MULTI CARRIER SIGNAL - In an embodiment, a multi-carrier signal (e.g., an OFDM signal) is received over a channel. Indicators of interference and the channel response at a carrier frequency of the signal are determined, and compared. If the indicator of interference has a particular relationship to the indicator of the channel response, then a data value transmitted at the carrier frequency is recovered from a data value received at the carrier frequency according to a particular data-recovery algorithm. Because the particular data-recovery algorithm may be faster than a conventional data-recovery algorithm, recovering one or more data values with the particular algorithm may increase the speed at which data is recovered from a multicarrier signal as compared to using a conventional data-recovery algorithm. | 04-22-2010 |
20100165906 | VTS FRAME FORMAT - Methods and apparatus for transmitting a video frame in wireless local area network communications are proposed. In one aspect, a method generates and transmits an IEEE 802.11 media access control (MAC) frame containing a video transport stream (VTS) frame. The VTS frame includes a video frame and a VTS control header that includes control information with respect to the video frame. | 07-01-2010 |
20100165907 | RELIABLE AND DETERMINISTIC COMMUNICATION PROTOCOL - A reliable and deterministic video communication protocol is provided. In one aspect, a method of transmitting data, audio or video frames in a basic service set having a plurality of stations in a wireless local area network transmits a transmit opportunity information element to reserve a transmit opportunity time interval. The method further transmits the data, audio or video frames to a number of the stations in the basic service set during the reserved transmit opportunity time interval. In another aspect, a method of transmitting data, audio or video frames in a basic service set having a plurality of stations in a wireless local area network first transmits protection frames to reserve a time interval, then transmits frames during the reserved time interval or during a non-reserved time interval. In yet another aspect, a method of transmitting data, audio or video frames in a basic service set having a plurality of stations in a wireless local area network utilizes acknowledgement frames from the plurality of stations to acknowledge the transmission. A wireless communication device is also provided. | 07-01-2010 |
20100165963 | ROBUST UNICAST/BROADCAST/MULTICAST COMMUNICATION PROTOCOL - Methods and apparatus for implementing a robust unicast/broadcast/multicast protocol are provided. In one aspect, a method of avoiding collision of intra-basic service set unicast, broadcast or multicast transmissions notifies stations in the basic service set of a reserved transmit opportunity for a unicast, broadcast or multicast transmission. Transmissions from at least one station in the basic service set are deferred until after the reserved unicast, broadcast or multicast transmit opportunity. | 07-01-2010 |
20110075586 | Method of Inter-System Coexistence and Spectrum Sharing for Dynamic Spectrum Access Networks-On-Demand Spectrum Contention - This invention relates to cognitive radio based wireless communications of dynamic spectrum access networks, and more particularly to a method of addressing inter-systems (cells) coexistence and spectrum sharing. The described method of spectrum sharing called On-Demand Spectrum Contention, integrates Dynamic Frequency Selection and Transmission Power Control with iterative on-demand spectrum contentions and provides fairness, adaptability, and efficiency of spectrum access for dynamic spectrum access systems using active inter-system coordination. | 03-31-2011 |
20110129024 | ACCOUNTING FOR INTER-CARRIER INTERFERENCE IN DETERMINING A RESPONSE OF AN OFDM COMMUNICATION CHANNEL - In an embodiment, a channel estimator includes first and second stages. The first stage is operable to generate a respective one-dimensional array of first channel-estimation coefficients for each communication path of a communication channel, and the second stage is operable to generate a multi-dimensional array of second channel-estimation coefficients in response to the first channel-estimation coefficients. For example, such a channel estimator may estimate the response of a channel over which propagates an orthogonal-frequency-division-multiplexed (OFDM) signal that suffers from inter-carrier interference (ICI) due to Doppler spread. Such a channel estimator may estimate the channel response more efficiently, and with a simpler algorithm, than conventional channel estimators. Furthermore, such a channel estimator may be able to dynamically account for changes in the number of communication paths that compose the channel, for changes in the delays of these paths, or the portions of the transmitted symbol energy carried by these paths. | 06-02-2011 |
20110255520 | COMMUNICATION BETWEEN OVERLAPPING WRAN CELLS WORKING IN DIFFERENT CHANNELS - A common control channel for base station (“BS”)/consumer premise equipment (“CPE”) communication in areas of overlapping coverage by wireless regional area network (“WRAN”) cells operating on different working channels is disclosed. A common control channel is selected from among the various working channels sensed in each of a plurality of overlapping WRAN cells so as to enable BS/CPE and BS/BS communication. Once chosen, each CPE within the overlapping area communicates with the controlling BS via an enhanced coexistence beacon protocol messages. These messages include timing and other synchronization information. | 10-20-2011 |
20110286375 | WGA STA POWER SAVING - This invention relates to switching power saving modes and rescheduling communication frames for various periods of a beacon interval (BI) defined under WGA Draft Specification 0.8 for the personal basic service set (PBSS) and infrastructure BSS to achieve further power savings and other advantages. Stations can be awake during a contention-based period (CBP) if it is in active state and can schedule frames during a service period (SP) to allow the assigned receiver to transmit to the assigned initiator. Stations in a group can schedule a group address frame to be sent during the CBP and group SP of a specific periodic BI. Stations in peer-to-peer connection may directly notify its peer stations of its power saving mode and wakeup schedule. Stations of an infrastructure basic service set (BSS) can also use the same power saving mechanism as stations of a PBSS noting a difference where each BI will be an access point's (AP's) awake BI. | 11-24-2011 |
20110294424 | OPERATION PROCEDURES FOR INTEROPERABLE SAFETY AND NON-SAFETY COMMUNICATIONS IN WIRELESS ENVIRONMENTS - For enhanced interoperability of safety and non-safety communications, a dual-radio type T RSU for improving services includes a first radio dedicated to the control channel and a second radio dedicated to the safety channel. The control channel is divided into a number of synchronous intervals, each about 100 milliseconds in duration. The safety channel is also divided into a number of synchronous intervals, each about 100 milliseconds in duration. | 12-01-2011 |
20110294434 | CHANNEL SWITCHING FOR INTEROPERABLE SAFETY AND NON-SAFETY COMMUNICATIONS IN WIRELESS ENVIRONMENTS - For enhanced interoperability of safety and non-safety communications, a synchronous interval is divided into a safety channel interval and an open interval instead of a CCH (control channel) interval and SCH (service channel) interval. For a single-radio device, a control interval, in place of an open interval should be scheduled at least once every maximum service scheduling period. Such a control interval is dedicated for CCH (and SCH) operation. For a multi-radio device, a control interval is scheduled at least once every maximum control interval on one of the radios support non-safety services (e.g. tolling). | 12-01-2011 |
20110294447 | DISCOVERY OF SAFETY AND NON-SAFETY CAPABLE SINGLE-RADIO DEVICES IN WIRELESS ENVIRONMENTS - Discovery of safety and non-safety capable single-radio devices in vehicular wireless environments is made possible through the use a two-bit indicator. A first indicator is associated with a type C device. A second indicator is associated with a non-type C device within one hop of a type C device. A third indicator is associated with a non-type C device within two hops of a type C device. A fourth indicator is associated with a non-type C device within three hops or more (out of range) of a type C device. Discovery of safety and non-safety capable single-radio vehicular devices within a protection range in multiple-channel based wireless vehicular environments is thus made possible. | 12-01-2011 |
20120008603 | CONTENTION BASED PERIOD BEAMFORMING - Contention based period beamforming includes the establishment of synchronized communications between a beamforming initiator and a beamforming responder to precisely define a start time for beamforming training. Synchronization between the beamforming initiator and beamforming responder begins with the sending of control information to the responder so that the start of the beamforming process will be synchronized. With beamforming training synchronized, beamforming is initiated using the sector sweep process. | 01-12-2012 |
20120026883 | FAIR CHANNEL USE IN A WIRELESS AREA NETWORK - Fair usage of working channels in a wireless network is disclosed. A base station associated with a cell within a wireless community monitors the congestion of the working channel of neighboring communities. Upon determining that the congestion of the working channel of a neighboring community is less than that of its existing working channel, the base station initiates a switch to the neighboring community's working channel. Upon joining the new community, the frame structure and other networking parameters and attributes are adjusted. | 02-02-2012 |
20120028573 | DIRECTIONAL COMMUNICATION TECHNIQUE FOR SYSTEMS WITH STATIONS HAVING MULTIPLE ANTENNAS OR MULTIPLE ANTENNA SUBASSEMBLIES - A system includes a plurality of stations capable of communicating with each other. A station of the system may comprise multiple antenna subassemblies and a receiver coupled to the subassemblies. The station is operable to activate one or more of the subassemblies to determine a direction of a first incoming signal, and to then activate another one or more of the subassemblies to receive a second incoming signal from substantially the same direction. Alternatively, the station may comprise multiple antenna subassemblies and a receiver coupled to the subassemblies and operable to activate each of the subassemblies for a respective interval to service at least one respective transmitting station covered by the activated subassembly during the interval. | 02-02-2012 |
20120045008 | PILOT PATTERN FOR MIMO OFDM - In an embodiment, a transmitter includes a transmission path that is configurable to generate first pilot clusters each including a respective first pilot subsymbol in a first cluster position and a respective second pilot subsymbol in a second cluster position such that a vector formed by the first pilot subsymbols is orthogonal to a vector formed by the second pilot subsymbols. For example, where such a transmitter transmits simultaneous orthogonal-frequency-division-multiplexed (OFDM) signals (e.g., MIMO-OFDM signals) over respective channels that may impart inter-carrier interference (ICI) to the signals due to Doppler spread, the pattern of the pilot symbols that compose the pilot clusters may allow a receiver of these signals to estimate the responses of these channels more accurately than conventional receivers. | 02-23-2012 |
20120114053 | DETERMINING A RESPONSE OF A RAPIDLY VARYING OFDM COMMUNICATION CHANNEL USING AN OBSERVATION SCALAR - In an embodiment, a channel estimator includes first and second stages. The first stage is configurable to generate an observation scalar for a communication path of a communication channel, and the second stage is configurable to generate channel-estimation coefficients in response to the first observation scalar. For example, such a channel estimator may use a recursive algorithm, such as a VSSO Kalman algorithm, to estimate the response of a channel over which propagates an OFDM signal that suffers from ICI due to Doppler spread. Such a channel estimator may estimate the channel response more accurately, more efficiently, with a less-complex algorithm, and with less-complex software or circuitry, than conventional channel estimators. Furthermore, such a channel estimator may be able to dynamically account for changes in the number of communication paths that compose the channel, changes in the delays of these paths, and changes in the signal-energy levels of these paths. | 05-10-2012 |
20120114069 | PILOT PATTERN FOR OBSERVATION SCALAR MIMO-OFDM - In an embodiment, a transmitter includes first and second transmission paths. The first transmission path is configurable to generate first pilot clusters each including a respective first pilot subsymbol in a first cluster position, and the second transmission path is configurable to generate second pilot clusters each including a respective second pilot subsymbol in a second cluster position such that a vector formed by the first pilot subsymbols is orthogonal to a vector formed by the second pilot subsymbols. For example, where such a transmitter transmits simultaneous orthogonal-frequency-division-multiplexed (OFDM) signals (e.g., MIMO-OFDM signals) over respective channels that may impart inter-carrier interference (ICI) to the signals due to Doppler spread, the pattern of the pilot symbols that compose the pilot clusters may allow a receiver of these signals to use a recursive algorithm, such as a Vector State Scalar Observation (VSSO) Kalman algorithm, to estimate the responses of these channels. | 05-10-2012 |
20120114080 | DETERMINING RESPONSES OF RAPIDLY VARYING MIMO-OFDM COMMUNICATION CHANNELS USING OBSERVATION SCALARS - In an embodiment, a channel estimator includes first, second, and third stages. The first stage is configurable to generate a first observation scalar for a first communication path of a first communication channel, and the second stage is configurable to generate a second observation scalar for a first communication path of a second communication channel. And the third stage is configurable to generate channel-estimation coefficients in response to the first and second observation scalars. For example, such a channel estimator may use a recursive algorithm, such as a Vector State Scalar Observation (VSSO) Kalman algorithm, to estimate the responses of channels over which propagate simultaneous orthogonal-frequency-division-multiplexed (OFDM) signals (e.g., MIMO-OFDM signals) that suffer from inter-carrier interference (ICI) due to Doppler spread. Such a channel estimator may estimate the channel responses more accurately, more efficiently, with a less-complex algorithm, and with less-complex software or circuitry, than conventional channel estimators. | 05-10-2012 |
20120134324 | 80MHZ/160MHZ TRANSMISSION OPPORTUNITY (TXOP) PROTECTION IN 802.11ac TRANSMISSIONS - A method and apparatus for negotiating an idle subchannel set for a wireless data transmission. The method includes transmitting an indication of a first set of idle subchannels to a wireless station. The method also includes receiving an indication of a second set of idle subchannels from the wireless station. The method further includes determining a final set of idle subchannels based on the indication of the first set of idle subchannels and the indication of the second set of idle subchannels. | 05-31-2012 |
20120135776 | Method and apparatus for reducing power comsumption in a wireless communication device - A method and apparatus for conserving power in a wireless communication device. The method includes receiving at least a portion of a PHY protocol data unit (PPDU) frame, where the PPDU frame includes an aggregate MAC protocol data unit (A-MPDU) field. The method also includes comparing a receiver address (RA) within the A-MPDU field to a stored address of the wireless communication device and, if the received RA does not match the stored address, causing power to be removed from one or more circuits of the wireless communication device for a calculated period of time. | 05-31-2012 |
20120157151 | TRANSMIT POWER CONTROL IN 160 MHZ BSS - Three alternative methods of controlling transmit power in a basic service set (BSS) including a plurality of stations that have successfully synchronized with an access point include providing each BSS with one transmit power limit that is not more than the lowest one of the transmit power limits of all of its operating channels, providing each BSS with one transmit power limit that is fixed for physical layer convergence procedure (PLCP) protocol data units (PPDU) with each channel bandwidth, or providing each BSS with one transmit power limit that is fixed for each 80 MHz channel. | 06-21-2012 |
20120163264 | MULTIPLE MAC ADDRESSES IN A DEVICE - Multiple virtual MAC addresses may be added to WGA devices that may have different traffic streams to another device that requires different services, thus creating distinct MAC and device level implications. Beamforming training can be done at the device level for all virtual MAC addresses. Wakeup, doze, and ATIM power save can be done at the device level depending on the frames received. Authentication, deauthentication, association, and deassociation can be done variously at both levels. Further MSDUs can be aggregated for the multiple MAC addresses. | 06-28-2012 |
20120287974 | RECOVERING DATA FROM A PRIMARY ONE OF SIMULTANEOUS SIGNALS, SUCH AS ORTHOGONAL-FREQUENCY-DIVISION-MULTIPLEXED (OFDM) SIGNALS, THAT INCLUDE A SAME FREQUENCY - An embodiment of a receiver includes signal- and data-recovery units. The signal-recovery unit is configured to recover a first component of a first signal that is received simultaneously with a second signal having a second component, the first and second components including approximately a frequency. And the data-recovery unit is configured to recover data from the first signal in response to the recovered first component. For example, such a receiver may be able to receive simultaneously, and over the same channel space, multiple orthogonal-frequency-division-multiplexed (OFDM) signals that include one or more of the same subcarrier frequencies, and to recover data from one or more of the OFDM signals despite the frequency overlap. A receiver with this capability may allow an increase in the effective bandwidth of the channel space, and thus may allow more devices (e.g., smart phones) to simultaneously share the same channel space. | 11-15-2012 |
20120300866 | SIMULTANEOUS TRANSMISSION OF SIGNALS, SUCH AS ORTHOGONAL-FREQUENCY-DIVISION-MULTIPLEXED (OFDM) SIGNALS, THAT INCLUDE A SAME FREQUENCY - An embodiment of a transmitter includes detection, generating, and transmission stages. The detection stage is configured to detect a first signal having a first component that includes a frequency, and the generating stage is configured to generate a data component that includes approximately the frequency in response to the detection of the first signal. The transmission stage is configured to transmit a second signal having the data component while the detection stage is detecting the first signal. For example, two or more such transmitters (e.g., two or more smart phones) may simultaneously transmit OFDM signals on the same subcarrier frequencies and over the same channel space. By allowing the simultaneous transmission of multiple signals on the same frequencies and over the same channel space, such a transmitter may increase the effective bandwidth of the channel space, and thus may allow more devices to simultaneously share the same channel space. | 11-29-2012 |
20120315943 | SP/CBP SCHEDULE INFORMATION DISTRIBUTION - The distribution of the service period (SP) and contention-based period (CBP) scheduling information in the data transfer time (DTT) of a beacon interval (BI) defined under the WGA Draft Specification 0.8 is selectively scheduled to optimize channel access contention. STAs in a single antenna scope or groups of STAs in multiple antennas scopes is allocated to different CBPs to decrease collisions. Simultaneous CBPs is further allocated to STAs in multiple antennas scopes where STAs have peer-to-peer traffic with other STAs in the same antenna group during part of the CBP when the personal PCP/AP is unavailable to that antenna group resulting in an increase in network throughput. | 12-13-2012 |
20130022091 | RECOVERING DATA FROM A SECONDARY ONE OF SIMULTANEOUS SIGNALS, SUCH AS ORTHOGONAL-FREQUENCY-DIVISION-MULTIPLEXED (OFDM) SIGNALS, THAT INCLUDE A SAME FREQUENCY - An embodiment of a receiver includes a channel estimator and a data-recovery unit. The channel estimator is configured to determine a characteristic of a channel over which a first signal, which is received simultaneously with a second signal, propagated, the first and second signals respectively having first and second components that include approximately a frequency. And the data-recovery unit is configured to recover data from the first signal in response to the determined channel characteristic. For example, such a receiver may be able to receive simultaneously, and over the same channel space, orthogonal-frequency-division-multiplexed (OFDM) signals that include one or more of the same subcarrier frequencies, and to recover data from one or more of the OFDM signals despite the frequency overlap. A receiver with this capability may allow an increase in the effective bandwidth of the channel space, and thus may allow more devices to simultaneously share the channel space. | 01-24-2013 |
20130155930 | SUB-1GHZ GROUP POWER SAVE - Methods and systems are disclosed for reduced power consumption in communication networks, including sensor networks implemented according to IEEE 802.11ah, by organizing stations into groups having long sleep periods. By organizing the stations of the network into groups, the access point can match each group's traffic identification map with its target beacon transmit time. One embodiment organizes the stations sequentially by AID numbers. Other embodiments organize the stations by similar power save requirements and/or nearby geographical location. Forms of an Extended Traffic Identification Map are matched with an awaken Target Beacon Transmit Time of the group. | 06-20-2013 |
20130155952 | SUB-1GHZ MAC FRAME HEADER COMPRESSION - Methods and systems are disclosed specifying the arrangement and content of the fields in data and management frames, which allow for greater payload efficiency in frame-based communication networks. The content of the fields is changed from the standard 802.11 arrangement to meet of the needs of networks such as Sub-1GHz networks, including those of the 802.11 ah standard, and sensor networks with a large number of stations transmitting at low data rates. In some embodiments, MAC header fields are reduced from standard 802.11 header fields by using only two fields for addressing and eliminating standard fields that are not used in sensor networks. | 06-20-2013 |
20130155953 | CHANNEL BANDWIDTH INDICATION AND TXOP PROTECTION - Methods and systems are disclosed for the operation of wireless communication networks, in which communication channels can have possibly overlapping bandwidths of different sizes, including sensor networks operating by the IEEE 802.11ah standard. A first method of signaling to negotiate the channel bandwidth conveys the needed information in the SIG field of the PPDUs of duplicate RTS/CTS frames, and uses the SIG field of PPDUs of duplicated data, control and management frames to perform transmit opportunity protection. A second method of signaling to negotiate the channel bandwidth conveys the needed information in the scrambling sequence field of PPDUs of duplicate RTS, and uses the scrambling sequence field of PPDUs of duplicated data, control and management frames to perform transmit opportunity protection. | 06-20-2013 |
20130176921 | VHT TXOP POWER SAVE - A wireless, specifically VHT, system that includes APs and STAs can power save during the TXOP. The AP in the system announces whether STAs in the system do SU or MU TXOP power save in a Beacon/Probe Response, and the STAs in the system transmit to the AP whether the STA is capable and willing to save power during a SU, MU, or SU+MU TXOP. For the AP, the process further involves buffering data frames for STAs that have entered doze mode until the end of TXOP. The AP further transmits to STAs a duration of TXOP in the Duration field of a RTS frame. The STA can inform the AP to enter TXOP PM mode in a bit in the HT Control field. | 07-11-2013 |
20130194920 | VHT TDLS - TDLS support in VHT devices is enabled through the use of added VHT fields in the TDLS frames. A VHT TDLS direct link can be setup through a respective TDLS Setup Request/Response with added field announcing VHT Capabilities of the VHT device and the peer device. Added VHT Operation field in the TDLS Setup Confirm frame adds supports between VHT peer devices for non-VHT BSS and VHT BSS. Two VHT STAs can establish wider TDLS channel than BSS operating channel through TDLS establishment. VHT off channel support is enabled by adding Wide Bandwidth Channel Switch field in the TDLS Channel Switch Request frame and no changes to TDLS Channel Switch Response. A VHT Capabilities field is also added to TDLS Discovery Response frame to inform peer devices of device capabilities. | 08-01-2013 |
20130244592 | RADIO FREQUENCY ARCHITECTURE FOR SPECTRUM ACCESS NETWORKS - Radio frequency (RF) architectures for spectrum access networks are provided. Embodiments of the invention generally provide a radio frequency (RF) architecture for customer premise equipment (CPE) for use in, for example, IEEE 802.22 wireless regional area networks (WRANs). In some embodiments, the CPE RF architecture includes two receive chains with a directional antenna and an omni-directional antenna, respectively. The CPE RF architecture facilitates opportunistic out-of-band spectrum sensing and WRAN signal receiving that are performed in parallel with data transmission. | 09-19-2013 |
20130266136 | METHOD, SYSTEM, AND DEVICES FOR FAST SESSION TRANSFER OF WIRELESS DEVICES FROM ONE FREQUENCY BAND TO ANOTHER - Embodiments are directed to switching of stations STA, access points APs and PCPs that are communicating through a wireless link from one frequency band to another. One embodiment is directed to switching of stations STA that are communicating through a tunneled direct link setup (TDLS) link from one frequency band to another. A multiband element may be added to a TDLS discovery request and TDLS discovery response frames to allow each of the stations communications through a TDLS to determine if the other station has multiband capability. In one embodiment, a pairwise transient key (PTK) is created for both a current band in which the stations STA are communicating and a new band over which the stations may communicate in the future. In this way there is no need to calculate a new pairwise transient key PTK for the new frequency band. | 10-10-2013 |
20140028547 | SIMPLE USER INTERFACE DEVICE AND CHIPSET IMPLEMENTATION COMBINATION FOR CONSUMER INTERACTION WITH ANY SCREEN BASED INTERFACE - A user control device operates with a variety of host systems, including computers, televisions and recorded or streaming video playback devices, and gaming systems, is mounted to the user's hand. The user control device includes audio and optical sensors for capturing audio and image or video data, allowing the use of voice commands and display focal center alignment control for “swiping” or scrolling the display. A combined inertial (accelerometer(s), gyroscope(s) and a magnetometer) sensor detects translation and rotation movement of the user control device for pointing and selecting within real or virtual three-dimensional space. Haptic (e.g., vibration) feedback units provide tactile feedback to the user to confirm double clicks and similar events. | 01-30-2014 |
20140029499 | SLOT-BASED POWER SAVE IMPROVEMENT - An access point (AP) associated with a several mobile stations (STAs) implements a slot-based power save poll (PS-Poll) method. The AP divides a slot-based access period into multiple time slots and allocates each time slot to either a STA determined to have slot-based PS-Poll capabilities or a STA determined to have buffered data present at the AP. The AP creates a traffic indication map (TIM) having a number of bits equal to the number of stations associated with the AP, and then transmits a beacon including the TIM. The TIM indicates to a slot-based PS-Poll capable STA which time slots are assigned to a selected set of associated stations. After receiving the beacon from the AP, the STA refrains from attempting to communicate with the AP outside the time slot assigned to the STA, yet transmits information to the AP during the time slot assigned to the STA. | 01-30-2014 |
20140029512 | SINGLE-SSID AND DUAL-SSID ENHANCEMENTS - A wireless local area network system establishes a PASSPOINT™ connection between a mobile station and a hotspot using an enhanced single SSID method or an enhanced dual SSID method. In the dual SSID method, an access point associates and authenticates a mobile device to a secondary SSID of the access point during enrollment and provisioning. After enrollment, the access point authenticates the mobile station to a primary SSID of the access point using the credential that the mobile station received from an online sign-up (“OSU”) server in connection with the secondary SSID. In the single SSID method, an access point performs two levels of authentication. During authentication, communications are limited to an 802.1x controlled port running on the mobile station and access point. After a first authentication, communications between the OSU server and the mobile station are unblocked. After the second authentication, all traffic from the mobile station is unblocked. | 01-30-2014 |
20140029597 | POWER EFFICIENT PS-POLL - A IEEE 802.11 Wireless Local Area Network (WLAN) system of an access point (AP) and one or more stations (STAB) reduces power consumption and increases battery life of power efficient low power STAB by decreasing the amount of time that a power efficient low power STA remains in an awake state. After indicating power efficient low power operation during association with an AP supporting such operation, the power efficient low power STA may enter the doze state from the time that the power efficient low power STA sends a PS-Poll until the power efficient low power STA receives the buffered DATA frame from the AP. While implementing the power efficient PS-Poll method, the AP can send the buffered DATA frame to the STA SIFS after the AP sends an ACK to the received PS-Poll from the STA. | 01-30-2014 |
20140078949 | EARLY ENDING OF FRAME RECEPTION - An additional cyclic redundancy check (CRC) is inserted in IEEE 802.11 beacon or data frames prior to the end of the frame, at a location following information sufficient for the receiving station to determine whether the frame is from an overlapping basic service set or intended for a different station and to extract other necessary or useful information such as a time of the next full beacon. Upon detecting the CRC, the receiving STA can terminate reception of the frame early to conserve power, and then enter a low power operational mode to further conserve power. | 03-20-2014 |
20140092797 | ENHANCEMENT OF LOW POWER MEDIUM ACCESS STAs - Enhanced low power medium access (LPMA) processes involve the enhanced LPMA STA indicating low power capabilities during association and being allocated an AID. The AID(s) for one or a group of enhanced LPMA STA(s) are included in one TIM sent during a different BEACON interval than the AID(s) for another or another group of enhanced LPMA STA(s). In addition, or alternatively, the AID(s) for enhanced LPMA STA(s) are located at an edge of the AID set within a TIM, a portion of the TIM that may be easily truncated and therefore not sent. The enhanced LPMA STAs and associated access point negotiate unique offset and sleepinterval periods for polling or data uplink by the enhanced LPMA STAs. | 04-03-2014 |
20140105098 | FRAME SPECIFICATION FOR A WIRELESS NETWORK COMMUNICATION - A compressed header format is used for messages transmitted in a wireless network. The compressed header includes a first address field and a frame control field including at least one bit specifying whether the first address is for an access point of the wireless communications network. The frame control field may further include at least one additional bit identifying whether the frame is being relayed by a relay node positioned between the access point and a wireless station. The frame control field may further include at least one further bit identifying whether AID is used for the first address field. | 04-17-2014 |
20140105131 | FAST INITIAL LINK SETUP (FILS) FRAME CONTENT FOR A WIRELESS NETWORK - A wireless network access point generates a fast initial link setup (FILS) discovery frame for broadcast to one or more wireless stations. The wireless network access point supports many operating channels including a primary channel. The FILS discovery frame includes a data field populated with an identification of a channel number for that primary channel of the wireless network access point. The FILS discovery frame includes another data field populated with a primary channel operating class identification. The broadcast FILS discovery frame further includes data indicating whether indicating whether multiple BSSIDs are supported. An FD capability field of the FILS discovery frame includes sub-fields indicating one or more of operation channel width, PHY type of the wireless access point, number of spatial streams supported by the wireless access point and multiple BSSIDs support provided by the wireless access point. | 04-17-2014 |
20140119268 | ROBUST UNICAST/BROADCAST/MULTICAST COMMUNICATION PROTOCOL - Methods and apparatus for implementing a robust unicast/broadcast/multicast protocol are provided. In one aspect, a method of avoiding collision of intra-basic service set unicast, broadcast or multicast transmissions notifies stations in the basic service set of a reserved transmit opportunity for a unicast, broadcast or multicast transmission. Transmissions from at least one station in the basic service set are deferred until after the reserved unicast, broadcast or multicast transmit opportunity. | 05-01-2014 |
20140140423 | PILOT PATTERN FOR OBSERVATION-SCALAR MIMO-OFDM - In an embodiment, a transmitter includes a transmission path configurable to generate first pilot clusters in response to a matrix, each first pilot cluster including a respective first pilot subsymbol in a first cluster position and a respective second pilot subsymbol in a second cluster position such that a vector formed by the first pilot subsymbols is orthogonal to a vector formed by the second pilot subsymbols, the matrix having a dimension related to a number of cluster positions in each of the first pilot clusters. For example, where such a transmitter transmits simultaneous orthogonal-frequency-division-multiplexed (OFDM) signals (e.g., MIMO-OFDM signals) over respective channels that may impart inter-carrier interference (ICI) to the signals due to Doppler spread, the pattern of the pilot symbols that compose the pilot clusters may allow a receiver of these signals to estimate the responses of these channels more accurately than conventional receivers. | 05-22-2014 |
20140185510 | WGA STA POWER SAVING - This invention relates to switching power saving modes and rescheduling communication frames for various periods of a beacon interval (BI) defined under WGA Draft Specification 0.8 for the personal basic service set (PBSS) and infrastructure BSS to achieve further power savings and other advantages. Stations can be awake during a contention-based period (CBP) if it is in active state and can schedule frames during a service period (SP) to allow the assigned receiver to transmit to the assigned initiator. Stations in a group can schedule a group address frame to be sent during the CBP and group SP of a specific periodic BI. Stations in peer-to-peer connection may directly notify its peer stations of its power saving mode and wakeup schedule. Stations of an infrastructure basic service set (BSS) can also use the same power saving mechanism as stations of a PBSS noting a difference where each BI will be an access point's (AP's) awake BI. | 07-03-2014 |
20150036543 | HIGH THROUGHPUT FEATURES IN 11S MESH NETWORKS - The addition of high throughput capability elements to beacon frames and peer link action frames in wireless mesh networks enable the utilization of desirable features without further modifications to the network. Rules can be established for high throughput mesh point protection in a mesh network, Space-time Block Code (STBC) operations and 20/40 MHz operation selections. However, features such as PSMP (power save multi-poll) and PCO (phased coexistence operations) are barred from implementation to prevent collisions. | 02-05-2015 |