Patent application number | Description | Published |
20090209264 | System and Method for Adaptively Controlling Feedback Information - A system and method for adaptively controlling feedback information according to a loading condition of a communications cell is provided. A method comprises receiving an indication from a base station, computing an amount of feedback information to transmit back to the base station using the indication, locating a feedback resource assigned to the mobile station using the amount of feedback information and an identity of the mobile station, computing a feedback information, and transmitting the feedback information using the located feedback resource. The indication is for a set of candidate transmission formats that is based on loading conditions in the cell. | 08-20-2009 |
20090252091 | System and Method for Multi-Stage Zero Forcing Beamforming in a Wireless Communications System - A system and method for multi-stage zero forcing beamforming in a wireless communications system is provided. A method includes receiving feedback information from each mobile station (MS) in a first plurality of mobile stations (MSs), selecting a first MS from the first plurality of MSs, and broadcasting information related to the first MS to the first plurality of MSs. The first MS having a largest value of a first metric based on the feedback information received from the first plurality of MSs. The method also includes receiving feedback information from each MS in a second plurality of MSs, selecting a second MS from the second plurality of MSs, and creating a precoding matrix from feedback information from the first MS and the second MS. The second MS having a largest value of a second metric based on the feedback information received from the second plurality of MSs. | 10-08-2009 |
20090253387 | System and Method for Wireless Communications - A system and method for wirelessly communicating using beamswitching is provided. A communications system includes a high-power signal cable coupled to a signal amplifier, a radio frequency circuit coupled to the high-power signal cable, and a control unit coupled to the radio frequency circuit. The high-power signal cable conveys a transmission signal produced by the signal amplifier. The radio frequency circuit includes a plurality of antennas, a passive network having a plurality of output ports and a plurality of input ports, each output port coupled to an antenna of the plurality of antennas, and a plurality of switches coupled to the high-power signal cable, each switch coupled to an input port in the plurality of input ports. The control unit produces the control signal based on a specified coupling of the high-power signal cable to the passive network. | 10-08-2009 |
20090257423 | System and Method for Channel Status Information Feedback in a Wireless Communications System - A system and method for channel status information feedback in a wireless communications system is provided. A method includes receiving a transmission containing feedback information from a mobile station (MS) having N total antennas, M receive/transmit antennas, N−M receive-only antennas, wherein N and M are integers and N>M, decoding the received transmission, computing estimates of CSI for channel elements of N−M receive-only antennas using the decoded transmission, computing estimates of CSI for channel elements of M receive/transmit antennas using channel reciprocity, and computing a precoding matrix from the channel elements for the N−M receive-only antennas and the M receive/transmit antennas. | 10-15-2009 |
20090305639 | Transmit Power Control for Dynamic Spectrum Access - A transceiver and a method of transmitting data are provided. A frequency band, such as a licensed frequency band, is monitored during a sensing block. Based upon the use of the frequency band during the sensing block, a probability of non-interfering is calculated during a plurality of time periods in a subsequent inter-sensing block. The probability of non-interfering is used by the transceiver to determine a transmit power level such that the possibility of interference with licensed use on the frequency band is reduced. Embodiments of the present invention may be used to improve the transmission rate of the cognitive radio user. | 12-10-2009 |
20090325482 | System and Method for Secondary Communications with Directional Transmission - System and method for exploiting spatial spectrum holes (SSH) in the time/spectrum/location of wireless resources. A method comprises setting a directional antenna to a first transmission direction, determining a state of a spectrum band in the first transmission direction, transmitting information in the first transmission direction to the receiver in response to determining that the spectrum band state is idle and that the receiver lies within a coverage area of a transmitter, and transmitting the information in the first transmission direction to a first relay in response to determining that the spectrum band state is idle and that the receiver lies without the coverage area of the transmitter. | 12-31-2009 |
20100003922 | System and Method for Scheduling of Spectrum Sensing in Cognitive Radio Systems - System and method for scheduling spectrum sensing in cognitive radio systems. A method comprises sensing an availability of a spectrum band, computing a duration of an inter-sensing time block based on the availability of the spectrum band, and scheduling an occurrence of the spectrum sensing operation using the duration of the inter-sensing time block. Computing the duration of the inter-sensing time block based on the availability of the spectrum band allows for an optimization of communications of the cognitive radio system, thereby increasing spectral efficiency and reducing interference to licensed communications. | 01-07-2010 |
20100027458 | Method and System for Full Duplex Relaying in a Wireless Communication Network - Embodiments of the present invention are systems and methods for wireless communication. According to one embodiment, a system for wireless communication comprises a first relay station, second relay station, and a base station. The first relay station and the second relay station are operable to receive and transmit wireless signals. The base station is operable to transmit the wireless signals to the first relay station and the second relay station in an interchanging pattern during successive time frames so that the first relay station and the second relay station forward the wireless signals to a mobile station. | 02-04-2010 |
20100062718 | System and Method for Unsynchronized Cooperative Spectrum Sensing in Cognitive Radio Nodes - System and method for unsynchronized cooperative spectrum sensing in cognitive radio nodes. A method comprises receiving spectrum sensing information from a plurality of communications nodes, computing for each communications node in the plurality of communications nodes, a likelihood ratio based on spectrum sensing information provided by the communications node, combining the likelihood ratios, and computing a decision value based on the combined likelihood ratio. Each communications node determines its respective spectrum sensing information at a time unrelated to times when other communications nodes determine their spectrum sensing information. | 03-11-2010 |
20100099364 | System and Method for Transmitting and Error Handling Control Feedback Information - A system and method for transmitting and error handling control feedback information is provided. A method for error handling in a transmission of control feedback information over a communications link by a first station includes determining a first feedback information at the first station, transmitting the first feedback information at a first instance to a second station, and receiving a scheduling message from the second station. The scheduling message includes a second feedback information, and the second feedback information is based on the first feedback information. The method also includes determining if the first feedback information at the first instance was received correctly by the second station based on the scheduling message, and in response to determining that the first feedback information at the first instance was not received correctly by the second station, transmitting the first feedback information at a second instance to the second station. | 04-22-2010 |
20100128687 | Systems and Methods for Scheduling and MU-MIMO in Uplink Vo-IP for OFDMA/SCFDMA Networks - A system and method for increasing the capacity of VoIP transmissions is disclosed. A preferred embodiment comprises fixing original transmissions into a frequency band and changing the retransmissions into separate frequency bands. Alternatively, the original transmissions may be changed into separate bands while the retransmissions may be fixed into a single frequency band. Additionally, an early termination procedure may be utilized and a combination of multi-input multi-output scheduling may be performed to further increase the capacity of the system. Another embodiment comprises reducing the overhead of a feedback signal for semi-persistent scheduling. | 05-27-2010 |
20100142599 | System and Method for Employing a Six-Bit Rank 1 Codebook for Four Transmit Antennas - A system and method for employing a six-bit rank 1 codebook for four transmit antennas is provided. A method for communications device operation includes estimating a communications channel between the communications device and a controller serving the communications device, thereby producing a channel estimate, quantizing the channel estimate using a codebook, thereby producing a selected codeword, and transmitting an index corresponding to the selected codeword from the codebook to the controller. The codebook includes a plurality of first level codewords, and each first level codeword includes a plurality of subsidiary codewords. | 06-10-2010 |
20100177742 | System and Method for Employing Six-Bit Rank 1 and 2 Codebooks for Four Transmit Antennas - A system and method for employing six-bit rank 1 and 2 codebooks for four transmit antennas is provided. A method for communications device operation includes estimating a communications channel between the communications device and a controller serving the communications device, thereby producing a channel estimate, quantizing the channel estimate using a codebook, thereby producing a selected codeword, and transmitting an index corresponding to the selected codeword from the codebook to the controller. The codebook includes a plurality of first level codewords, with each first level codeword having a plurality of subsidiary codewords. The quantizing is a search of only the first level codewords followed by a search of a subset of the plurality of subsidiary codewords, and the codebook is based on a rank of communications between the communications device and the controller. | 07-15-2010 |
20100260147 | System and Method for Supporting Handovers Between Different Radio Access Technologies of a Wireless Communications System - A system and method for supporting handovers between different radio access technologies is provided. A method for communications device operations includes sending a request to a controller of the communications device to change an operating mode of the communications device, and receiving a transmission responsive to the request. The method also includes in response to determining that the controller has granted the request to change the operating mode and that the communications device is operating in a border cell, changing the operating mode of the communications device, tuning at least one receiver of the communications device to an alternate radio access technology (RAT), and initiating a handover with the alternate RAT. | 10-14-2010 |
20110013552 | System, Methods, and Apparatus For Bidirectional Relaying In Wireless Communications Systems - In one embodiment, a method of wireless communication includes transmitting a first data packet from a user end during a first subframe of a radio frame. A second data packet is transmitted from a base station during a second subframe of the radio frame. A single data packet is received from a relay node in a third subframe of the radio frame. The single data packet includes the first and the second data packets. | 01-20-2011 |
20110021158 | System and Method for Enhanced Parallel Receiving Interworking in a Wireless Communications System - A system and method for enhanced parallel receiving interworking in a wireless communications network. A method for controller operation where the controller serves a communications device having at least two receivers includes detecting that the communications device has at least one receiver tuned to a current radio access technology (RAT) and at least one receiver tuned to an alternate RAT, adjusting a network parameter to alter the communication network's performance, and readjusting the network parameter back to its original value in response to determining that the communications device no longer has any receiver tuned to the alternate RAT. The adjusted network parameter impacts only the communications device. | 01-27-2011 |
20110110252 | System and Method for Channel Estimation in Wireless Communications Systems - A system and method for channel estimation in wireless communications systems are provided. A method for operations at a first communications device includes computing an estimate of a channel between the first communications device and a second communications device based on pilot signals transmitted from the second communications device, removing self-interference from a composite transmission relayed from a relay node, and detecting information contained in the transmissions from the second communications device from the composite transmission based on the estimate of the channel. The composite transmission includes transmissions from the first communications device and transmissions from the second communications device. | 05-12-2011 |
20120039416 | System and Method for Employing Six-Bit Rank 1 and 2 Codebooks for Four Transmit Antennas - A system and method is provided for employing six-bit rank 1 and 2 codebooks for multiple transmit antennas. A channel estimate is generated for a communications channel that can be established between a communications device and a controller serving the communications device. The channel estimate can be quantized using a codebook to produce a selected codeword. An index corresponding to the selected codeword can be transmitted to the controller. The codebook can include a plurality of first level codewords, with each first level codeword having a plurality of subsidiary codewords. The quantizing can be in the form of a search of the first level codewords followed by a search of a subset of a plurality of subsidiary codewords, and the codebook can be derived at least in part from a rank of communications between the communications device and the controller. | 02-16-2012 |
20120083201 | System and Method for Distributed Power Control in a Communications System - An embodiment method for power control in a multi-hop communications system includes transmitting a power usage pattern for each relay node in a subset of relay nodes served by a communications controller, where the power usage pattern specifies transmit power levels for the relay node while the relay node is operating in a power control mode. The method also includes receiving channel measurements of access links between the relay nodes in the subset of relay nodes and subscriber equipment served by the relay nodes, determining backhaul link transmit power levels and access link transmit power levels based on the channel measurements of access links and channel measurements of backhaul links between the communications controller and the relay nodes, and transmitting the access link power levels to the subset of relay nodes. | 04-05-2012 |
20120083203 | System and Method for Distributed Power Control in a Communications System - A system and method for distributed power control in a communications system are provided. A method for relay node operations includes transmitting a signal at a transmit power level on a first channel from a relay node to a user equipment, receiving a message comprising a first indication of channel quality of the first channel at the transmit power level, and determining a second indication of channel quality of a second channel between a communications controller and the relay node, where the first channel and the second channel are in a same multi-hop communication path. The method also includes altering the transmit power level of the first channel based on the first indication of channel quality and the second indication of channel quality to converge the channel quality of the first channel to a convergence value. | 04-05-2012 |
20120147942 | System and Method for Signaling and Detecting in Wireless Communications Systems - A system and method for signaling and detecting in wireless communications systems are provided. A method for processing information includes operating in a first phase, and operating in a second phase in response to determining that a first user is transmitting at a substantially higher power level than a second user, and processing the detected information. The first phase includes iteratively inverting a first filtering operation on received signals, and the second phase includes iteratively inverting a second filtering operation on received signals with consideration given to a first estimation error of symbols of the first user and a second estimation error of symbols of the second user. The operating remains in the first phase in response to determining that the first user is not transmitting at a substantially higher power level than the second user. | 06-14-2012 |
20130100944 | Wireless Connection Management Procedure - An apparatus comprising a connection manager in a user equipment (UE) configured to communicate with a cellular network via a cellular interface and with a short range wireless access network via a short range wireless access interface, wherein the connection manager is configured to enable the short range wireless access interface when a data connection request is detected and disable the short range wireless access interface when no more data connection requests are detected after expiration of a pre-determined time, and wherein the data connection request is at least partially delivered via the cellular interface while the short range wireless access interface is being set up and data connection is switched to the short range wireless access interface after completing short range wireless access interface setup. | 04-25-2013 |
20130109374 | System and Method for a Display Unit Coupled to a Smartphone | 05-02-2013 |
20130170398 | System and Method for Device Discovery for Device-to-Device Communication in a Cellular Network - An embodiment of a system enables a user equipment to employ a buddy list to initiate a D2D discovery process. The user equipment constructs a buddy list including other user equipments with which the user equipment would desire to communicate employing a D2D communication link. The user equipment transmits the buddy list to a serving base station. The user equipment transmits a request to the serving base station that it desires to communicate over a D2D communication link with a second user equipment that is on the buddy list. The user equipment receives D2D link setup information from the serving base station for the communication link with the second user equipment. The user equipment transmits a beacon signal employing the D2D link setup information. | 07-04-2013 |
20130170414 | System and Method for Device-to-Device Communication Overlaid on a Cellular Network - An embodiment of a system that operates a user equipment as a serving user equipment in a personal cell. The user equipment is configured to receive a communication resource from a base station to operate as a serving user equipment in a personal cell, the communication resource including a personal cell ID, and transmit in a cellular downlink the personal cell ID and control channel information included in the communication resource to a second user equipment. The communication resource can comprise a downlink of a cellular network for data transmission by the user equipment to the second user equipment. The user equipment retains a cellular communication link to a base station. | 07-04-2013 |
20130170452 | Low Complexity Beamforming Scheme - Beamforming can be simplified by selecting beamforming parameters without relying on channel state information (CSI). More specifically, beamforming parameters may be selected without CSI by applying different beamforming weight vectors to different subcarriers of a reference packet, and thereafter identifying which subcarrier had the highest signal quality upon reception of the reference packet by the user equipment (UE). The reference packet may be any packet, including a beacon packet, a null data packet, and other packets that are communicated periodically by an access point (AP). One or multiple codebooks may be used, and different codewords (or sets of codewords) may be applied in a time division multiplying (TDM) fashion. | 07-04-2013 |
20130230026 | Compact Transceiver Architecture for Achieving Device to Device (D2D) Communication Using Uplink and Downlink Carrier Frequencies - A system and method for device-to-device (D2D) communication is disclosed. A preferred embodiment comprises a frequency synthesizer configured to provide a first carrier frequency and a second carrier frequency, an up-converter coupled to the frequency synthesizer and configured to up-convert a first baseband signal into a cellular uplink signal when receiving the first carrier frequency from the frequency synthesizer, and configured to up-convert the first baseband signal into a first device-to-device signal when receiving the second carrier frequency from the frequency synthesizer, and a down-converter coupled to the frequency synthesizer and configured to down-convert a second device-to-device signal into a second baseband signal when receiving the first carrier frequency from the frequency synthesizer, and configured to down-convert a cellular downlink signal into the second baseband signal when receiving the second carrier frequency from the frequency synthesizer. | 09-05-2013 |
20130235796 | System and Method for Uplink Transmission in a Wireless Network - A method of communicating in a wireless network includes communicating, by a network element, a short clear-to-send (CTS) frame including a first short training field and a first long training field. Also, the short CTS frame includes a first signaling field including a first duration field and a first address of the station. | 09-12-2013 |
20130244715 | System and Method for Direct Mobile Communications Power Control - A method for transmitting to a direct mobile communications (DMC) device by a user equipment operating in both a cellular mode and a DMC mode includes estimating a first pathloss of a first channel from the user equipment to a base station according to a difference between a known base station transmit power level and a received base station power level, and estimating a second pathloss of a second channel from the user equipment to the DMC device according to a difference between a known DMC device transmit power level and a received DMC device power level. The method also includes setting a transmit power level for transmission to the DMC device according to the first pathloss and the second pathloss, and transmitting a signal to the DMC device at the transmit power level. | 09-19-2013 |
20130272137 | System and Method for Downlink Transmission in a Wireless Network - A method of communicating in a wireless network includes transmitting, by a station, a null data packet (NDP) power save (PS)-Poll frame including a short training field and a long training field. Also, the NDP PS-Poll frame includes a signaling field including a message type indicator, a transmitter address (TA), a receiver address (RA), and a cyclic redundancy check (CRC). Additionally, the method includes receiving, by the station, buffered data in accordance with the NDP PS-Poll frame. | 10-17-2013 |
20130279438 | System and Method for Beacon Transmission Timing Control - A method of broadcasting a first beacon by an access point of a communications system includes obtaining transmission times for second beacons broadcast by nearby access points, and adjusting a transmission time for the first beacon in accordance with the transmission times for the second beacons to group the first beacon and the second beacons together within a single channel. The method also includes broadcasting an indicator of the transmission time for the first beacon to stations operating in the communications system, and broadcasting the first beacon at the transmission time for the first beacon. | 10-24-2013 |
20130294270 | System and Method for Controlling Network Discovery - A method for discovering an access point of a communications system includes receiving an active scanning indicator, delaying transmission of a probe request of the station for a first amount of time in accordance with the active scanning indicator, and determining if the station is able to receive a matching probe request of a neighbor station during the first amount of time. The method also includes delaying transmission of the probe request for a second amount of time if the station is able to receive the matching probe request during the first amount of time, and determining if the station is able to receive a probe response corresponding to the matching probe request during the second amount of time. The method further includes transmitting the probe request if the station is not able to receive the probe response corresponding to the matching probe request during the second amount of time. | 11-07-2013 |
20130294360 | System and Method for Acknowledging Multiple Frames from Multiple Communications Devices - A method for acknowledging messages includes receiving a polling message from a plurality of stations served by the access point, and attempting to decode the polling message received. The method also includes generating a block acknowledgement bitmap (BAB) including an indication of a result of the decoding attempt of the polling message, and broadcasting the BAB to the plurality of stations. | 11-07-2013 |
20130301502 | METHOD AND APPARATUS FOR DATA TRANSMISSION IN A WIRELESS NETWORK - In a wireless local access network (WLAN), an access point (AP) broadcasts a beacon frame to a plurality of stations. The AP receives an indication frame from a station of the plurality of stations. The indication frame indicates that the station is available to receive a data packet for the station buffered at the AP. The AP indicates to the station a wakeup time for the station to wake up, and sends the data packet to the station at or after the wakeup time. | 11-14-2013 |
20130308530 | System and Method for Reducing Signaling Overhead - A method for operating a first station includes receiving a first management frame from a communications device, and generating an optimized management frame including a reference to the first management frame and update information for the first management frame specific to the first station. The method also includes transmitting the optimized management frame. | 11-21-2013 |
20130336184 | System and Method for Indicating Packet Transmission Time - A method for exchanging data includes generating a usage indicator for an access window, the usage indicator including a first indication of if an allowed station in a list of allowed stations needs to receive information about its resource allocation and at least one of a second indication of a start time of the access window, and a third indication of the list of allowed stations, and broadcasting the usage indicator. The method also includes exchanging data with at least one of the allowed stations within the access window in accordance with the usage indicator. | 12-19-2013 |
20130343305 | System and Method for Allocating Periodic Resources - A method for operating an access point includes broadcasting reservation information for a periodic group resource, assigning a resource in the periodic resource to a first station and transmitting information about the resource in the periodic group resource allocated to the first station to the first station, wherein the transmitting occurs during one of an association procedure with the first station and a reconfiguration of a resource assignment for the first station. The method also includes exchanging data with the first station during the resource in the periodic group resource allocated to the first station. | 12-26-2013 |
20140119282 | MESSAGE ACKNOWLEDGEMENT METHOD, APPARATUS, AND SYSTEM - A message acknowledgement method includes: An access point sends a beacon frame, receives an uplink frame sent by a terminal, and sends an acknowledgement frame for the uplink frame, where the acknowledgement frame includes offset time, and the offset time is a difference between a time point when the access point sends the acknowledgement frame and a time point when the access point sends the beacon frame; compares the difference that is obtained through calculation by the terminal and is between the time point when the terminal receives the acknowledgement frame and the time point when the terminal lately receives a beacon frame with the offset time carried in the acknowledgement frame, and if a difference between the two is within a preset error range, determines that the acknowledgement frame received by the terminal is sent by the access point associated with the terminal. | 05-01-2014 |
20140146074 | Intelligent Homescreen for Mobile Devices - An embodiment mobile device includes an environment sensing unit configured to sense parameters of an environment, a data processing unit in communication with the environment sensing unit, the data processing unit configured to compile usage statistics based previously sensed parameters of the environment and to determine if any applications correspond to the environment based on currently sensed parameters of the environment and the usage statistics stored in a memory, and a display in communication with the data processing unit, the display configured to display on a homescreen the applications that correspond to the environment. | 05-29-2014 |
20140241332 | System and Method for Indicating and Acquiring Information of an Access Point - A method for operating a transmitting device includes generating a configuration index (CI) information element (IE), the CI IE including a CI value and an indicator of a completeness of a configuration information included with the CI IE, wherein the completeness of the configuration information included with the CI IE is one of complete information and simplified information, and placing the CI IE in a frame. The method also includes transmitting the frame. | 08-28-2014 |
20140337633 | System and Method for Indicating a Service Set Identifier - A method for securing communications between an access point and a station includes generating a first hashed service set identifier (SSID) by applying a first hash function to a first SSID known by the station, transmitting a first message to the access point, wherein the first message includes the first hashed SSID, and receiving a second message from the access point, wherein the second message includes a second hashed SSID generated by the access point by applying a second hash function to a second SSID associated with the access point. The method also includes generating a third hashed SSID by applying the second hash function to the first SSID, determining if the third hashed SSID matches the second hashed SSID, and transmitting a third message to the access point if the third hashed SSID matches the second hashed SSID. | 11-13-2014 |
20150078356 | System and Method for One-Way Traffic in Wireless Communications Systems - A method for operating a sharing station includes receiving, by the sharing station, a request to send (RTS) frame on a wireless channel, wherein the RTS frame is not addressed to the sharing station, and wherein the RTS frame including a transmit only indicator indicating that a transmitting station of the RTS frame will only transmit frames without receiving frames until expiration of a first time value in a first duration field of the RTS frame. The method also includes determining, by the sharing station, if a clear to send (CTS) frame corresponding to the RTS frame is received within a specified time period after receiving the RTS frame, and transmitting, by the sharing station, a frame when the CTS frame corresponding to the RTS frame is not received within the specified time period. | 03-19-2015 |