Patent application number | Description | Published |
20080253199 | PARALLEL DATA STORAGE SYSTEM - A parallel data storage system for storing data received from, or retrieving data to, a host system using multiple data storage devices. The system includes an interface for communicating with the host system and a buffer configured to store data sectors received from the host system via the interface. A switch is used to selectively connect the interface and the data storage devices to the buffer to facilitate the transfer of data into and out of the buffer. The data sectors are transferred by segmenting each sector into multiple smaller data cells and distributing these data cells among the data storage devices using an arbitrated distribution method. | 10-16-2008 |
20090046513 | Enhanced erase for flash storage device - A flash storage device includes flash storage units that are erased in response to a condition or command while allowing the flash storage device to be used subsequent to the erase. A flash controller interface receives a command for erasing the flash storage device and provides an erase command to flash controllers in the flash storage device. Alternatively, the flash storage device detects a condition in response to which the flash controller interface provides an erase command to the flash controllers. Each flash controller independently erases a flash storage unit in response to receiving the purge command such that the flash storage units are erased substantially in parallel with each other and the erase operations overlap. Subsequent to the erase, certain control data is reconstructed to allow subsequent use of the flash storage device. | 02-19-2009 |
20090201732 | System and method for purging a flash storage device - A flash storage device includes flash storage units that are purged in response to a condition or command. A flash controller interface receives a command for purging the flash storage device and provides a purge command to flash controllers in the flash storage device. Alternatively, the flash storage device detects a condition in response to which the flash controller interface provides a purge command to the flash controllers. Each flash controller independently erases a flash storage unit in response to receiving the purge command such that the flash storage units are erased substantially in parallel with each other. | 08-13-2009 |
20090201734 | Verified purge for flash storage device - A flash storage device includes flash storage units that are purged in response to a condition or command wherein, during or subsequent to the purge, the purge is verified. A flash controller interface receives a command for purging the flash storage device and provides a purge command to flash controllers in the flash storage device. Alternatively, the flash storage device detects a condition in response to which the flash controller interface provides a purge command to the flash controllers. Each flash controller independently erases a flash storage unit in response to receiving the purge command such that the flash storage units are erased substantially in parallel with each other. The purge of the flash storage device is subsequently verified. | 08-13-2009 |
20090204749 | Redimdamt purge for flash storage device - A flash storage device includes flash storage units that are purged in response to a condition or command. A flash controller interface receives a command for purging the flash storage device and provides a purge command to flash controllers in the flash storage device. Alternatively, the flash storage device detects a condition in response to which the flash controller interface provides a purge command to the flash controllers. Each flash controller independently erases a flash storage unit in response to receiving the purge command, by writing a pattern of data to the flash storage unit, such that the flash storage units are purged substantially in parallel with each other. | 08-13-2009 |
20100023714 | PARALLEL DATA STORAGE SYSTEM - A parallel data storage system for storing data received from, or retrieving data to, a host system using multiple data storage devices. The system includes an interface for communicating with the host system and a buffer configured to store data sectors received from the host system via the interface. A switch is used to selectively connect the interface and the data storage devices to the buffer to facilitate the transfer of data into and out of the buffer. The data sectors are transferred by segmenting each sector into multiple smaller data cells and distributing these data cells among the data storage devices using an arbitrated distribution method. | 01-28-2010 |
Patent application number | Description | Published |
20120322493 | System and Method for Uplink Power Control in a Communications System - A system and method for power control in a communications system are provided. A method for controller operations includes determining a power level for a communications device, and adjusting the power level for the communications device to increase a bandwidth utilization of the communications device, where the adjusting is based on a minimum performance metric for the communications device. The method also includes signaling the adjusted power level to the communications device. | 12-20-2012 |
20130310102 | METHOD FOR OPTIMIZING UPLINK POWER-CONTROL PARAMETERS IN LTE - One embodiment of the present invention provides a system for setting uplink power-control parameters for a cell within a wireless network. During operation, the system receives parameters associated with uplink power for a plurality of user devices within the cell over a predetermined time interval, and averages the received parameters over the user devices and the predetermined time interval to obtain an averaged parameter. The system then determines a set of power-control parameters for the cell based on the averaged parameter, and sends the set of power-control parameters to the user devices to allow the user devices to control transmission power using the set of power-control parameters. | 11-21-2013 |
20140071954 | System and Method for Adaptive Transmission Time Interval (TTI) Structure - Methods and devices are provided for communicating data in a wireless channel. In one example, a method includes adapting the transmission time interval (TTI) length of transport container for transmitting data in accordance with a criteria. The criteria may include (but is not limited to) a latency requirement of the data, a buffer size associated with the data, a mobility characteristic of a device that will receive the data. The TTI lengths may be manipulated for a variety of reasons, such as for reducing overhead, satisfy quality of service (QoS) requirements, maximize network throughput, etc. In some embodiments, TTIs having different TTI lengths may be carried in a common radio frame. In other embodiments, the wireless channel may partitioned into multiple bands each of which carrying (exclusively or otherwise) TTIs having a certain TTI length. | 03-13-2014 |
20140140360 | Systems and Methods for Sparse Code Multiple Access - Coding gains can be achieved by encoding binary data directly to multi-dimensional codewords, which circumvents QAM symbol mapping employed by conventional CDMA encoding techniques. Further, multiple access can be achieved by assigning different codebooks to different multiplexed layers. Moreover, sparse codewords can be used to reduce baseband processing complexity on the receiver-side of the network, as sparse codewords can be detected within multiplexed codewords in accordance with message passing algorithms (MPAs). | 05-22-2014 |
20140146754 | Systems and Methods for Waveform Selection and Adaptation - Systems, methods, and apparatuses for providing waveform adaptation are provided. In an example, a method is provided for identifying a plurality of candidate waveforms, and selecting one of the candidate waveforms for data transmission. The candidate waveforms may be identified in accordance with one or more criteria, such as a transmission capability of the transmitting device, a reception capability of the receiving device, a desired Peak-to-Average-Power-Ratio (PAPR) characteristic, adjacent channel interference (ACI) rejection requirements, spectrum localization requirements, and other criteria. The waveform selected for data transmission may be selected in accordance with one or more waveform selection criteria, such as traffic characteristic, application types, etc. | 05-29-2014 |
20140169408 | System and Method for Open-Loop MIMO Communications in a SCMA Communications System - A method for transmitting data includes mapping a first coded information bit stream intended for a first transmit antenna onto at least one first spreading sequence of a plurality of first spreading sequences to generate a first data stream, mapping a second coded information bit stream intended for a second transmit antenna onto at least one second spreading sequence of a plurality of second spreading sequences to generate a second data stream. The method also includes transmitting the first data stream and the second data stream on respective transmit antennas. | 06-19-2014 |
20140169409 | Systems and Methods for Open-loop Spatial Multiplexing Schemes for Radio Access Virtualization - System and method embodiments are provided for open-loop spatial multiplexing for radio access virtualization. In an embodiment, a system includes a plurality of antenna ports and a processor coupled to the plurality of antenna ports and configured to spread a spreading sequence over at least a portion of the plurality of antenna ports in a spatial domain, wherein the processor is configured to cause the antenna ports to transmit multiple spreading sequences simultaneously by sequence superposition. | 06-19-2014 |
20140169412 | System and Method for Low Density Spreading Modulation Detection - In one embodiment, a method for blindly detecting low density spreading (LDS) active signatures including receiving, by a first node from a second node, a signal and decorrelating the signal in accordance with a signature list to obtain an active signature list. The method also includes decoding the signal in accordance with the active signature list to obtain a decoded signal. | 06-19-2014 |
20140188444 | System and Method for Pruning an Over-Defined System Model - Methods and apparatuses are provided to select coefficients for modeling a system. Data collected from the system is used to generate a data matrix. An upper triangular matrix can be generated in accordance with the data matrix, and the upper triangular matrix can be pruned to remove selected rows and columns from the upper triangular matrix, thereby generating a pruned data matrix. A coefficient vector can be generated in accordance with the pruned data matrix. Various alternative methods of selecting coefficients for modeling the system, as well as apparatus, devices, and systems for performing said methods, are also provided. | 07-03-2014 |
20140192767 | System and Method for Small Traffic Transmissions - A grant-free transmission mode may be used to communicate small traffic transmissions to reduce overhead and latency. The grant-free transmission mode may be used in downlink and uplink data channels of a wireless network. In the downlink channel, a base station transmits packets to a group of UEs in a search space without communicating any transmission code assignments to the UEs. The UEs receive the downlink packets using blind detection. In the uplink channel, UEs transmit packets in an access space using assigned access codes which are either independently derived by the UEs or otherwise communicated by the base station using a slow-signaling channel. Hence, the grant-free transmission mode allows mobile devices to make small traffic transmissions without waiting for uplink grant requests. | 07-10-2014 |
20140254455 | System And Method For Reduced Signaling Transmissions In A Communications System - A method for operating a communications controller includes assigning one or more code domain elements (CDE) of a transmission zone to each user equipment (UE) of a plurality of UEs being served by the communications controller and operating in the transmission zone and having a transmission available. The method also includes transmitting downlink information located in the one or more CDEs to the UEs without utilizing dynamic control signaling. | 09-11-2014 |
20140254544 | System and Method for Uplink Grant-Free Transmission Scheme - A method embodiment includes implementing, by a base station (BS), a grant-free uplink transmission scheme. The grant-free uplink transmission scheme defines a first contention transmission unit (CTU) access region in a time-frequency domain, defines a plurality of CTUs, defines a default CTU mapping scheme by mapping at least some of the plurality of CTUs to the first CTU access region, and defines a default user equipment (UE) mapping scheme by defining rules for mapping a plurality of UEs to the plurality of CTUs. | 09-11-2014 |
20140369434 | System and Method for Designing and Using Multidimensional Constellations - A method for generating a codebook includes applying a unitary rotation to a baseline multidimensional constellation to produce a multidimensional mother constellation, wherein the unitary rotation is selected to optimize a distance function of the multidimensional mother constellation, and applying a set of operations to the multidimensional mother constellation to produce a set of constellation points. The method also includes storing the set of constellation points as the codebook of the plurality of codebooks. | 12-18-2014 |
20150043540 | System and Method for Scalable Digital Communications with Adaptive System Parameters - A method for operating an adapting device includes selecting a first access mode out of a plurality of access modes for a first transmission between a first communications device and a second communications device, wherein the selection of the first access mode is made in accordance with an access mode criterion, and at least one of communications system information, and user equipment information, and determining sparse code multiple access (SCMA) parameters from the first access mode in accordance with a SCMA parameter mapping rule. The method also includes providing information about the first access mode to at least one of the first communications device and the second communications device. | 02-12-2015 |
20150071182 | System and Method for Increasing Low Density Signature Space - Embodiments are provided herein for increasing low density signature space for multiplexed transmissions for a plurality of users. The embodiments include generating a virtual signature using a combination operation on a plurality of basic signatures. The generated virtual signatures are provisioned as basic resource units (BRUs) for transmissions for corresponding users. The combination operation is a row-wise or column-wise permutation for combining, in each of the virtual signatures, rows or columns of corresponding basic signatures. The rows or columns represent sequences of frequency bands at one time interval or sequences of allocated time intervals at one frequency band. Alternatively, the combination operation is intra-basic resource unit (BRU) hopping. The embodiments also include generating a plurality of BRU sets comprised of virtual signatures. Each of the BRU sets is provisioned for a corresponding user. | 03-12-2015 |
20150236823 | HARQ Frame Data Structure and Method of Transmitting and Receiving with HARQ in Systems Using Blind Detection - A HARQ frame data structure and methods of transmitting and receiving with HARQ in systems using blind detection. In one embodiment, a method of transmitting over a channel using HARQ includes transmitting a first frame containing data toward a blind detection receiver, and transmitting a second frame containing at least a portion of the data and information about the first frame toward the blind detection receiver. | 08-20-2015 |
20150282185 | MULTI-USER, MULTIPLE ACCESS, SYSTEMS, METHODS, AND DEVICES - In a multi-access communication system having a plurality of multiplexed layers and a plurality of mobile devices, mobile devices are paired over time-frequency and space resources. Transmission power is allocated such that a total power is shared among the plurality of multiplexed layers. The plurality of multiplexed layers and rate of each of the plurality of mobile devices are adjusted according to a power and a channel quality of the mobile device. Power and rate are adjusted until a scheduling criterion such as a weighted sum-rate is maximized. | 10-01-2015 |
20150318970 | System and Method for Grassmannian Signaling in a Broadband Network - An embodiment method includes determining, by a first network device, an equivalent coherence time of a narrowband network corresponding to the broadband network in accordance with a channel coherence time and a coherence bandwidth of the broadband network. The method further includes structuring, by the first network device, a Grassmannian symbol in accordance with the equivalent coherence time, generating, by the first network device, Grassmannian symbol sections by partitioning the Grassmannian symbol in accordance with the coherence bandwidth, and transmitting, by the first network device to a second network device, the Grassmannian symbol sections on subchannels within the coherence bandwidth. | 11-05-2015 |
20150351093 | System and Method for Adaptive Transmission Time Interval (TTI) Structure - Methods and devices are provided for communicating data in a wireless channel. In one example, a method includes adapting the transmission time interval (TTI) length of transport container for transmitting data in accordance with a criteria. The criteria may include (but is not limited to) a latency requirement of the data, a buffer size associated with the data, a mobility characteristic of a device that will receive the data. The TTI lengths may be manipulated for a variety of reasons, such as for reducing overhead, satisfy quality of service (QoS) requirements, maximize network throughput, etc. In some embodiments, TTIs having different TTI lengths may be carried in a common radio frame. In other embodiments, the wireless channel may partitioned into multiple bands each of which carrying (exclusively or otherwise) TTIs having a certain TTI length. | 12-03-2015 |
20160006492 | Wireless Feedback System and Method - A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords c | 01-07-2016 |
Patent application number | Description | Published |
20090129502 | WIRELESS FEEDBACK SYSTEM AND METHOD - A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords c | 05-21-2009 |
20110069780 | TRANSMISSION OF SYMBOLS IN A MIMO ENVIRONMENT USING ALAMOUTI BASED CODES - A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an to Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code. | 03-24-2011 |
20110122846 | UPLINK CONTROL SIGNAL DESIGN FOR WIRELESS SYSTEM - Transmission of uplink control message for a wireless system. The uplink control message may be encoded according to one of multiple possible schemes. The choice of encoding scheme may be made based on the control message size and/or based on the available transmission resources and/or based on the detection scheme used on the receiving end. A modulation scheme may also be selected based on such factors. CDM may be used for certain control messages. Block code encoding, such as Reed-Muller encoding may be used for certain control messages. Different transmission resources may be allocated for different control message uses. The encoding specifics may be selected to obtain a certain hamming distance and/or size of the encoded message or based on other factors. | 05-26-2011 |
20110149846 | UPLINK CONTROL SIGNAL DESIGN FOR WIRELESS SYSTEM - Transmission of uplink control message for a wireless system. The uplink control message may be encoded according to one of multiple possible schemes. The choice of encoding scheme may be made based on the control message size and/or based on the available transmission resources and/or based on the detection scheme used on the receiving end. A modulation scheme may also be selected based on such factors. CDM may be used for certain control messages. Block code encoding, such as Reed-Muller encoding may be used for certain control messages. Different transmission resources may be allocated for different control message uses. The encoding specifics may be selected to obtain a certain hamming distance and/or size of the encoded message or based on other factors. | 06-23-2011 |
20110164701 | SYSTEMS AND METHODS OF ENCODING USING A REDUCED CODEBOOK WITH ADAPTIVE RESETTING - To feedback MIMO channel conditions, a codeword from a codebook is selected. To reduce signalling, the codewords are organized into codeword subsets. The receiver signals an index of a codeword into a current codeword subset previously made known to the transmitter. The current codeword subset is adaptively selected based on a threshold criterion. For example, if the best codeword from the current codeword subset is not sufficiently similar to the best codeword in the full codebook, a switch in the codeword subset is made. | 07-07-2011 |
20110280336 | Enhanced Method for Transmitting or Retransmitting Packets - A method for transmitting data in a multiple-input-multiple-output space-time coded communication comprising: a. transmitting a plurality of sets of symbols over a plurality of antennae and respective transmission resources according to a mapping table, the mapping table mapping the plurality of symbols defining the communication to respective antennae from amongst the plurality of transmission antennae and to their respective transmission resource; and wherein the transmitting comprises transmitting symbols forming at least a part of a segment-level Alamouti based code in the mapping table. | 11-17-2011 |
20120060069 | GENERATION AND APPLICATION OF A SUB-CODEBOOK OF AN ERROR CONTROL CODING CODEBOOK - There is provided a method of encoding and decoding data using an error control code having a codebook G. The codebook G is a sub-codebook of a codebook P. Each codeword g in the sub-codebook G has an autocorrelation amplitude that is different from and higher than each correlation amplitude between g and each of the other codewords in the sub-codebook G. In one specific embodiment in which the codebook P is that of a Reed-Muller code, using G instead of P reduces the likelihood of the presence of more than one maximum correlation amplitude when computing the non-coherent decision metric during decoding. | 03-08-2012 |
20120066564 | Differential Encoding With Adaptive Resetting - To feedback MIMO channel conditions, a codeword from a codebook is selected. To reduce signalling, the codewords are organized into codeword subsets. The receiver signals an index of a codeword into a current 5 codeword subset previously made known to the transmitter. The current codeword subset is adaptively selected based on a threshold criterion. For example, if the best codeword from the current codeword subset is not sufficiently similar to the best codeword in the full codebook, a switch in the codeword subset is made. | 03-15-2012 |
20120219083 | WIRELESS FEEDBACK SYSTEM AND METHOD - A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords c | 08-30-2012 |
20130182685 | Uplink Control Signal Design for Wireless System - The present disclosure generally relates to an uplink control signal design for wireless system. One example method includes establishing communication with a mobile station in a multi-carrier wireless communication system using a primary carrier, providing a first control signaling via the primary carrier, the first control signaling assigning at least one secondary carrier, and receiving a channel quality indication of the secondary carrier via the primary carrier using a control channel. | 07-18-2013 |
20130322567 | Generation and Application of a Sub-Codebook of an Error Control Coding Codebook - There is provided a method of encoding and decoding data using an error control code having a codebook G. The codebook G is a sub-codebook of a codebook P. Each codeword g in the sub-codebook G has an autocorrelation amplitude that is different from and higher than each correlation amplitude between g and each of the other codewords in the sub-codebook G. In one specific embodiment in which the codebook P is that of a Reed-Muller code, using G instead of P reduces the likelihood of the presence of more than one maximum correlation amplitude when computing the non-coherent decision metric during decoding. | 12-05-2013 |
20140119484 | Transmission of Symbols in a MIMO Environment using Alamouti Based Codes - A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an to Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code. | 05-01-2014 |
20140157091 | Generation and Application of a Sub-Codebook of an Error Control Coding Codebook - There is provided a method of encoding and decoding data using an error control code having a codebook G. The codebook G is a sub-codebook of a codebook P. Each codeword g in the sub-codebook G has an autocorrelation amplitude that is different from and higher than each correlation amplitude between g and each of the other codewords in the sub-codebook G. In one specific embodiment in which the codebook P is that of a Reed-Muller code, using G instead of P reduces the likelihood of the presence of more than one maximum correlation amplitude when computing the non-coherent decision metric during decoding. | 06-05-2014 |
Patent application number | Description | Published |
20110051835 | UPLINK MIMO TRANSMISSION FROM MOBILE COMMUNICATIONS DEVICES - A method of uplink transmission from a mobile device having multiple antennas to a base station having multiple antennas includes transmitting in an open-loop single-user MIMO mode when the mobile device is at high speed, transmitting in a closed-loop single-user MIMO mode when the mobile device is at low speed, and, upon request, transmitting in a multi-user collaborative MIMO mode. The method also includes controlling uplink transmissions in a selected one of the open-loop single-user MIMO, the closed-loop single-user MIMO and the multi-user collaborative MIMO modes. Uplink transmissions from the mobile device may be transmitted using multiple antennas of the mobile device. Upon request, the mobile device may switch to transmitting in multi-user collaborative MIMO mode with a subset of the multiple antennas. | 03-03-2011 |
20110122811 | Codebook restructure, differential encoding/decoding and scheduling - A method and apparatus for feedback of channel information characterizing a wireless transmission between a base station and a mobile station. The method involves, at the base station, locating in a codebook of predetermined channel responses a predetermined channel response identified by: a primary identifier identifying a cluster associated with a channel response generated by a mobile station; and a differential identifier identifying channel response member within the cluster identified by the primary identifier. The predetermined channel responses are grouped in a plurality of clusters in accordance with a correlation criterion, each cluster including a plurality of predetermined channel response members. The method also involves generating a control signal for controlling transmissions to the mobile station in accordance with the located predetermined channel response. A method and apparatus for feedback of channel information characterizing a wireless transmission between a mobile station and a base station are also disclosed. | 05-26-2011 |
20110122963 | CODEBOOK RESTRUCTURE, DIFFERENTIAL ENCODING/DECODING, AND SCHEDULING - There is disclosed a method for feedback of channel information characterizing a wireless transmission between a base station and a mobile station over a communications channel. The method involves: receiving a primary identifier identifying a cluster associated with a channel response generated by a mobile station; receiving a differential identifier identifying channel response member within the cluster identified by the primary identifier; locating in a codebook of predetermined channel responses a predetermined channel response identified by said primary identifier and said differential identifier, the predetermined channel responses in the codebook being grouped in a plurality of clusters in accordance with a correlation criterion, each cluster including a plurality of predetermined channel response members; and generating a control signal for controlling transmissions to the mobile station in accordance with said located predetermined channel response. | 05-26-2011 |
20120044849 | POWER ALLOCATION IN CLOSED-LOOP DOWNLINK COOPERATIVE MULTIPLE POINT (COMP) TRANSMISSION - Techniques for power allocation among a plurality of network nodes in a communication network for cooperative downlink transmission to a mobile terminal are provided. Cooperative transmission to a mobile terminal is done in a selected one of a plurality of frequency bands allocated for cooperative downlink transmission, wherein each network node has a respective predetermined frequency band transmission power level for each of the plurality of frequency bands allocated for cooperative downlink transmission. Selection of the frequency band on which the mobile terminal will be cooperatively transmitted to is based on channel state information indicative of the channel between the mobile terminal and each of the network nodes and, for each of the frequency bands, the respective plurality of predetermined frequency band transmission power levels corresponding to the plurality of network nodes. | 02-23-2012 |
20130010694 | Multi-Carrier Operation for Wireless Systems - A method for a subscriber station to perform network entry in a multi-carrier wireless environment that has a primary carrier and at least one secondary carrier associated with a base station. The method includes sensing a carrier in an area serviced by the base station and determining if the carrier is a primary carrier or a secondary carrier. The method further includes performing the network entry if the determining establishes that the sensed carrier is a primary carrier and not a secondary carrier. | 01-10-2013 |
20130016679 | Uplink Control Signal Design for Wireless System - A method for an SS to perform network entry in a multi-carrier wireless environment that has a primary carrier and at least one secondary carrier associated with a BS, the method comprising: a. sensing a carrier in an area serviced by the BS; b. determining if the carrier is a primary carrier or a secondary carrier; and c, performing the network entry if the determining establishes that the sensed carrier is a primary carrier and not a secondary carrier. | 01-17-2013 |
20140211879 | UPLINK MIMO TRANSMISSION FROM MOBILE COMMUNICATIONS DEVICES - Uplink transmission from a mobile device having multiple antennas to a base station having multiple antennas includes transmitting in an open-loop single-user MIMO mode when the mobile device is at high speed, transmitting in a closed-loop single-user MIMO mode when the mobile device is at low speed, and, upon request, transmitting in a multi-user collaborative MIMO mode. The method also includes controlling uplink transmissions in a selected one of the open-loop single-user MIMO, the closed-loop single-user MIMO and the multiuser collaborative MIMO modes. Uplink transmissions from the mobile device may be transmitted using multiple antennas of the mobile device. Upon request, the mobile device may switch to transmitting in multi-user collaborative MIMO mode with a subset of the multiple antennas. | 07-31-2014 |
20140233502 | Multi-Carrier Operation For Wireless Systems - The present disclosure generally relates to an uplink control signal design for wireless system. One example method of a subscriber station (SS) includes performing network entry in a multi-carrier wireless environment using a primary carrier, receiving timing information corresponding to the primary carrier, receiving a first control signaling via the primary carrier, the first control signaling assigning at least one secondary carrier, transmitting uplink data via the secondary carrier using an uplink transmission timing of the secondary carrier, the uplink transmission timing of the secondary carrier being assigned the same as an uplink transmission timing of the primary carrier, and determining an adjustment of the uplink transmission timing or frequency of the secondary carrier. | 08-21-2014 |
20150131531 | Uplink Mimo Transmission from Mobile Communications Devices - Uplink transmission from a mobile device having multiple antennas to a base station having multiple antennas includes transmitting in an open-loop single-user MIMO mode when the mobile device is at high speed, transmitting in a closed-loop single-user MIMO mode when the mobile device is at low speed, and, upon request, transmitting in a multi-user collaborative MIMO mode. The method also includes controlling uplink transmissions in a selected one of the open-loop single-user MIMO, the closed-loop single-user MIMO and the multiuser collaborative MIMO modes. Uplink transmissions from the mobile device may be transmitted using multiple antennas of the mobile device. Upon request, the mobile device may switch to transmitting in multi-user collaborative MIMO mode with a subset of the multiple antennas. | 05-14-2015 |
20150305017 | Multi-Carrier Operation For Wireless Systems - The present disclosure generally relates to an uplink control signal design for wireless system. One example method of a subscriber station (SS) includes performing network entry in a multi-carrier wireless environment using a primary carrier, receiving timing information corresponding to the primary carrier, receiving a first control signaling via the primary carrier, the first control signaling assigning at least one secondary carrier, transmitting uplink data via the secondary carrier using an uplink transmission timing of the secondary carrier, the uplink transmission timing of the secondary carrier being assigned the same as an uplink transmission timing of the primary carrier, and determining an adjustment of the uplink transmission timing or frequency of the secondary carrier. | 10-22-2015 |