Patent application number | Description | Published |
20080198830 | SYSTEMS AND METHODS FOR ARRANGING MAC LAYER PDUS IN A DOWNLINK BURST - Embodiments of systems and methods for arranging data units in a downlink burst transmission are generally described herein. Other embodiments may be described and claimed. In some embodiments a group of data units are arranged by associated identifiers. These identifiers may also be associated with certain subscriber stations. Once arranged, the data units may be transmitted in a downlink burst and received by a subscriber station. The subscriber station may determine the arrangement of the data units to decode until a cutoff value is determined and passed. | 08-21-2008 |
20080232401 | LOGICAL AND TRANSPORT CHANNEL STRUCTURES FOR MOBILE WiMAX WIRELESS SYSTEMS - An embodiment of the present invention provides an apparatus, comprising a transceiver adapted to operate according to an Institute for Electronic and Electrical Engineers (IEEE) STD 802.16e-2005 or IEEE 802.16m standard and further adapted to use logical and transport/physical channelization. Furthermore, a virtual wideband RF channel concept (support of contiguous and non-contiguous RF bands in OFDMA and non-OFDMA wireless systems through aggregation of smaller RF bands) is also described herein, from which all wireless communication systems and standards can benefit. | 09-25-2008 |
20080261623 | TECHNIQUES TO ENHANCE LOCATION ESTIMATION IN AN OFDMA BASED SYSTEM - An embodiment of the present invention provides an a method, comprising determining the position of a mobile station in a wireless network by transmitting a single or multi tone location beacon by the base station on a downlink or mobile station on an uplink with focused power on at least one tone. | 10-23-2008 |
20090003303 | TECHNIQUES FOR COEXISTENCE-AWARE RESOURCE ALLOCATION IN WIRELESS NETWORKS - An embodiment of the present invention provides a method, comprising using MAC coordination between a plurality of co-located radios to resolve co-located multi-radio co-existence at the MAC layer. | 01-01-2009 |
20090080544 | Method and apparatus for an OFDMA parallel architecture scheduler - A method and apparatus for calculating an optimal sub-channel allocation of Orthogonal Frequency Division Multiple Access (OFDMA) from a first bipartite graph that may map users, to a second bipartite graph that may map additional users, including original users. A calculation of each bipartite graph may include a calculation of maximum weight paths and matchings. Using a bipartite graph method for OFDMA sub-channel allocation may improve the time and complexity when establishing an OFDMA wireless system. | 03-26-2009 |
20090097426 | METHOD FOR IMPROVING POWER EFFICIENCY OF SUBSCRIBER STATIONS - Disclosed is a method for improving power efficiency of subscriber stations in a communication network. A subscriber station is uniquely identified by a base station using a connection Identifier (CID). The method includes splitting CIDs of subscriber stations to form a plurality of first parts and a plurality of second parts. The method includes generating an index including a plurality of entries and transmitting the index to a plurality of subscriber stations by the base station. One or more subscriber stations switch to a power-saving mode on absence of a match between each entry of the plurality of entries with an equivalent part of CIDs associated with the one or more subscriber stations, thereby conserving power and improving power efficiency of the subscriber station. Further, at least one information element in a sub-MAP message may be compressed to reduce overhead. | 04-16-2009 |
20090109931 | METHOD FOR CODING ADDITIONAL INFORMATION IN A MEDIA ACCESS PROTOCOL (MAP) MESSAGE - Disclosed is a method for reducing number of bits in a Media Access Protocol (MAP) message. The MAP message comprises a plurality of information elements grouped into one of a first set of information elements and a second set of information elements. The first set of information elements are arranged in a pre-defined order and each of the second set of information elements is inserted into one of a prefix position to the pre-defined order, a suffix position to the pre-defined order and an intermediate position in-between two information elements in the pre-defined order. Each information element of the second set of information elements is then coded based on position of the information element relative to the position of the first set of information elements in the pre-defined order, thereby reducing the number of bits in the MAP message. | 04-30-2009 |
20090247086 | Reducing co-channel interference - A base station may transmit at varied power levels. Subscriber stations receiving the power levels can transmit noise information back to the base station. As a result, co-channel interference can be determined from the varied power transmissions, either in the base station or in the subscriber station. In addition, in some embodiments, the transmissions may include different phases so that the phase of the co-channel interference may be determined as well. | 10-01-2009 |
20090247148 | TECHNIQUES FOR FEEDBACK IN CELLULAR SYSTEMS TO MITIGATE INTERFERENCE IN DOWNLINK - An embodiment of the present invention provides a method, comprising broadcasting base station (BS) channel allocation methods and supported interference mitigation techniques in a whole cell by the base station and reporting classification information by mobile stations (MSs) within the cell to said base station about their preferred interference mitigation (IM) techniques. | 10-01-2009 |
20090274103 | SYSTEM AIDED PAPR REDUCTION SCHEME BASED ON TR ALGORITHM - A peak-to-average power ratio (PAPR) reduction method, known as system-aided PAPR reduction (SAPR), is disclosed. Based on a TR algorithm, the SAPR method avoids the drawbacks of conventional tone reservation implementations, and reduces PAPR significantly, in some embodiments. The SAPR method may be applied to next generation OFDMA-based wireless broadband technologies, to increase system throughput and cell coverage. | 11-05-2009 |
20090323513 | WEIGHTED TONE RESERVATION FOR OFDM PAPR REDUCTION - A weighted tone reservation (WTR) method and system are disclosed, for PAPR reduction. The WTR method solves the peak re-growth problem with minimum overhead. By avoiding the drawbacks of conventional tone reservation approaches, systems employing the WTR method may experience a significant PAPR reduction. The WTR method may be applied to next generation OFDMA-based wireless broadband technologies to increase system throughput and cell coverage. | 12-31-2009 |
20090323602 | Efficient bandwith request for broadband wireless networks - Methods and apparatuses for scheduling transmissions between a base station and multiple user stations in a broadband wireless access network may include a subscriber station generating a bandwidth request which includes one of a limited number of available and predefined preamble sequences and a data portion identifying the resources requested. The subscriber station randomly selects a contention slot in a wireless channel, allocated by the base station, for sending a bandwidth request. The receiving base station is able to detect the preamble sequence of bandwidth requests and differentiate between subscribers even when bandwidth requests of two or more subscribers may collide by virtue of selecting the same contention slot. In this manner, latency and overhead of bandwidth requests may be improved. Additional variants and embodiments are also disclosed. | 12-31-2009 |
20100004016 | Power control techniques - Embodiments provide techniques for power control. For instance, a method exchanges one or more transmissions with a remote device in accordance with a retransmission protocol. In addition, a power control message is exchanged with the remote device through at least one of the one or more transmissions. Thus, closed loop power control may be performed through retransmission protocol communications. | 01-07-2010 |
20100005354 | Detection and recovery of HARQ NAK-TO-ACK feedback error in wireless communications systems - In wireless communication networks that use ARQ/HARQ feedback protocols, when a first device receives an apparent HARQ ACK from a second device, the first device may make a new transmission using a HARQ Channel ID whose previous usage was under conditions indicating a likelihood of error in the ACK. When the second device receives the new transmission, the reuse of that HARQ Channel ID in a new transmission rather than a retransmission lets the second device know that its previous NAK transmission was incorrectly received as an ACK. | 01-07-2010 |
20100005355 | INTERFERENCE AVOIDANCE WITH SYNCHRONOUS HARQ AND PERSISTENT SCHEDULING - A method of avoiding periodic interference by permuting periodic transmissions by a base station (BS) may include transmitting a frame of data to a subscriber station (SS). The BS may check for an acknowledgement of the frame of data from the SS and may schedule a next frame of data for transmission or retransmission based on whether the acknowledgement was received from the SS. The scheduling may include permuting traffic within the next frame in time or in frequency relative to similar traffic in a prior frame according to a predetermined function. The BS may generate media access protocol (MAP) information for the next frame based on the permuting. | 01-07-2010 |
20100008331 | BANDWIDTH ALLOCATION BASE STATION AND METHOD FOR ALLOCATING UPLINK BANDWIDTH USING SDMA - Embodiments of a base station and methods for allocating uplink bandwidth using SDMA are generally described herein. In some embodiments, uplink bandwidth request messages are received on a bandwidth request contention channel from one or more subscriber stations. The uplink bandwidth request messages are generated by the subscriber stations by modulating pilot subcarriers of a randomly selected disjoint pilot pattern with a randomly selected orthogonal sequence. The base station allocates uplink bandwidth to the subscriber stations when the uplink bandwidth request messages are successfully detected and decoded. The base station uses an SDMA technique to determine channel responses based on the orthogonal sequences to detect and decode the uplink bandwidth request messages. | 01-14-2010 |
20100080113 | TONE RESERVATION TECHNIQUES FOR REDUCING PEAK-TO-AVERAGE POWER RATIOS - Embodiments of the present disclosure describe closed loop scheduled peak-to-average power (PAPR) reduction systems and methods to facilitate desired PAPR reduction. Other embodiments describe weighted tone reservation (WTR) methods and systems for PAPR reduction. Still other embodiments may be described and claimed. | 04-01-2010 |
20100080308 | VIRTUAL MULTICARRIER DESIGN FOR ORTHOGONAL FREQUENCY DIVISION ... - Embodiments of the present invention provide a virtual multicarrier design for orthogonal frequency division multiple access communications. Other embodiments may be described and claimed. | 04-01-2010 |
20100098037 | Apparatus,systems and methods adapted for opportunistic forwarding of uplink short messages in wireless metropolitan area networks - An embodiment of the present invention provides an apparatus, comprising a subscriber station (SS) operable to communicate with a base station (BS) and at least one additional subscriber station (SS) in a wireless metropolitan area network, wherein the at least one additional SS attempts to overhear a first message from the SS and piggy back a second message for the overheard message from the SS's uplink data to the BS with its uplink data. | 04-22-2010 |
20100144356 | Base station coordination through co-located relays - A relay station, which is used to communicate between a base station and a subscriber station in a wireless communications network, may also be used to communicate between the base station and another base station in an adjacent network by having the relay station communicate a message to or from the other base station, either directly or through another relay station associated with the other base station. In some embodiments, relay stations in adjacent networks may be co-located, so that they can communicate with each other over a short high-speed link. In some embodiments this link may be suitable for direct digital communications rather than through modulated carrier signals. | 06-10-2010 |
20100157875 | Spatial reuse techniques with wireless network relays - In various embodiments of the invention, a relay station in a wireless communications network may communicate with one or more subscriber stations at the same time and/or on the same frequency that the associated base station is communicating with another relay station in the same network. This contrasts with the conventional technique of devoting one time period or frequency exclusively to communications between the base station and the relay stations, and devoting another time period or frequency exclusively to communications between the relay stations and the subscriber stations. | 06-24-2010 |
20100162069 | Dynamic interference avoidance with asynchronous HARQ - In a wireless communications network, a wireless device may examine the received signal to determine the strength of the received signal, and also determine the level of interference and noise. If a retransmission is needed due to a message being incorrectly received, these factors may then be processed to estimate whether the probable cause of poor reception is interference from a neighboring network. If such interference is the likely cause, the retransmission may be changed to a different time and/or to different frequencies in a subsequent frame, so that the interference from the neighboring network is less likely to reoccur. | 06-24-2010 |
20100166119 | MIMO SYMBOL DECODER AND METHOD FOR DECODING SPATIALLY MULTIPLEXED SYMBOLS USING COMBINED LINEAR EQUALIZATION AND MAXIMUM LIKELIHOOD DECODING - Embodiments of MIMO symbol decoders and methods for decoding spatially multiplexed symbols using combined linear equalization decoding and maximum likelihood decoding are generally described herein. In some embodiments, one group of symbols (y) received through two or more spatial channels is decoded using a linear equalization decoding technique and another group of symbols is decoded using a maximum likelihood decoding (MLD) technique to generate a soft-bit output. The symbols may be grouped for either linear equalization decoding or MLD based on channel orthogonality or signal-to-interference and noise ratios (SINRs). | 07-01-2010 |
20100169400 | PARTIALLY RANDOM PERMUTATION SEQUENCE GENERATOR - Embodiments of the present disclosure provide methods, systems, and apparatuses related to a partially random permutation sequence generator. Other embodiments may be described and claimed. | 07-01-2010 |
20100203917 | Techniques to determine transmitter power - Techniques are described that can be used to determine a transmitter power level of a mobile station based on spectrum efficiency gain and loss. Spectrum efficiency gain is measured for a home sector base station. Spectrum efficiency loss is measured for base stations other than the home sector base station. In one example, a base station transmits information such as noise plus interference level to a mobile station and the mobile station determines the transmitter power level. In another example, the mobile station transmits information such as preamble signal strength and preamble total signal strength to the home sector base station and the home sector base station determines the transmitter power level and instructs the mobile station to apply the determined transmitter power level. | 08-12-2010 |
20100208831 | TECHNIQUES FOR QUICK ACCESS CHANNEL INFORMATION LOADING IN WIRELESS NETWORKS - An embodiment of the present invention provides a method of quick access channel information loading in wireless networks, comprising mapping at least one quick access channel to one distributed resource unit of control tiles, said control tiles being spread across consecutive sub-carriers and consecutive OFDMA symbols, wherein each control tile and a predetermined number of sub carriers are used to send a bandwidth indicator and a predetermined number of sub carriers are used to send a bandwidth request message, and wherein there exist unique orthogonal sequences for the bandwidth indicator and each of the sequences are capable of being selected as a preamble sequence. | 08-19-2010 |
20100234059 | Techniques to control transmitter power level - A channel normally used to transmit acknowledgement of successful signal receipt and an indication of unsuccessful signal receipt is adopted to transmit power control information from a base station to a mobile station. The power control information can be encoded as a binary code where each value of the code is indicated by an acknowledgement or non-acknowledgement signal. | 09-16-2010 |
20100254472 | Full-rate, full-diversity space-time block code technique for multiple transmissions using simple linear decoding complexity - An embodiment of the present invention provides a space-time block code (STBC) transmission method for 4 transmit antennas, comprising adding two 2×2 orthogonal pre-coding before a two Alamouti transmission for a 4 transmit antennas scheme. | 10-07-2010 |
20110149807 | TECHNIQUES TO PROVIDE PHYSICAL RESOURCE ALLOCATION USING A TREE-BASED STRUCTURE AND COMMUNICATE A CHANNEL QUALITY INDICATOR - In a wireless network, simultaneous support of distributed and contiguous sub-carrier allocation may be accomplished in the same sub-frame or time zone. Techniques are described herein that can be used to allocate distributed and/or contiguous basic (physical) resource blocks to users by specifying a codebook index and parent node. Techniques are described herein that can be used to flexibly set a number of sub-channels over which a subscriber station indicates a channel quality indicator to a base station. Sub-channels may be represented as nodes and may be grouped to include a parent node and child nodes. By specifying a code book to use and a parent node, the channel quality indicator of the parent and children nodes can be indicated. | 06-23-2011 |
20110188432 | METHOD FOR IMPROVING POWER EFFICIENCY OF SUBSCRIBER STATIONS - Disclosed is a method for improving power efficiency of subscriber stations in a communication network. A subscriber station is uniquely identified by a base station using a connection Identifier (CID). The method includes splitting CIDs of subscriber stations to form a plurality of first parts and a plurality of second parts. The method includes generating an index including a plurality of entries and transmitting the index to a plurality of subscriber stations by the base station. One or more subscriber stations switch to a power-saving mode on absence of a match between each entry of the plurality of entries with an equivalent part of CIDs associated with the one or more subscriber stations, thereby conserving power and improving power efficiency of the subscriber station. Further, at least one information element in a sub-MAP message may be compressed to reduce overhead. | 08-04-2011 |
20120243483 | WIRELESS COMMUNICATIONS DEVICE HAVING A VIRTUAL WIDEBAND CHANNEL - An embodiment of the present invention provides an apparatus comprising an Orthogonal | 09-27-2012 |
20120287895 | BASE STATION AND METHOD FOR RESOURCE ALLOCATION IN A 3GPP LTE NETWORK - Embodiments of a base station and methods for allocating uplink bandwidth using SDMA are generally described herein. In some embodiments, uplink bandwidth request messages are received on a bandwidth request contention channel from one or more subscriber stations. The uplink bandwidth request messages are generated by the subscriber stations by modulating pilot subcarriers of a randomly selected disjoint pilot pattern with a randomly selected orthogonal sequence. The base station allocates uplink bandwidth to the subscriber stations when the uplink bandwidth request messages are successfully detected and decoded. The base station uses an SDMA technique to determine channel responses based on the orthogonal sequences to detect and decode the uplink bandwidth request messages. | 11-15-2012 |
20130114527 | VIRTUAL MULTICARRIER DESIGN FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS COMMUNICATIONS - Embodiments of the present invention provide a virtual multicarrier design for orthogonal frequency division multiple access communications. Other embodiments may be described and claimed. | 05-09-2013 |
20130136026 | CHANNEL QUALITY INFORMATION FEEDBACK TECHNIQUES FOR A WIRELESS SYSTEM - Channel quality information feedback techniques for a wireless system are described. An apparatus may comprise a base station having base station logic to determine a channel quality indicator feedback dimension value representing a number of resource blocks for an orthogonal frequency division multiple access system to be measured by a subscriber station based on a matching ratio value, and a transceiver to send the channel quality indicator feedback dimension value to the subscriber station. Other embodiments are described and claimed. | 05-30-2013 |
20130273857 | SYSTEM AND METHOD FOR MANAGING MULTIRADIO COMMUNICATIONS IN A SINGLE DEVICE - An apparatus may include a processor circuit and a communication scheduling module operable on the processor circuit to receive a first set of terminal information of a first terminal transceiver, and a second set of terminal information of a second terminal transceiver, determine whether the first and second terminal transceivers are co-located in a radio terminal based on the first and second sets of terminal information, and schedule first and second radio-frequency (RF) communications with the first and second terminal transceivers, respectively, of the radio terminal to reduce interference between the first and second communications when the first and second terminal transceivers are co-located within the radio terminal. Other embodiments are disclosed and claimed. | 10-17-2013 |
20140126524 | TECHNIQUES TO PROVIDE PHYSICAL RESOURCE ALLOCATION USING A TREE-BASED STRUCTURE AND COMMUNICATE A CHANNEL QUALITY INDICATOR - In a wireless network, simultaneous support of distributed and contiguous sub-carrier allocation may be accomplished in the same sub-frame or time zone. Techniques are described herein that can be used to allocate distributed and/or contiguous basic (physical) resource blocks to users by specifying a codebook index and parent node. Techniques are described herein that can be used to flexibly set a number of sub-channels over which a subscriber station indicates a channel quality indicator to a base station. Sub-channels may be represented as nodes and may be grouped to include a parent node and child nodes. By specifying a code book to use and a parent node, the channel quality indicator of the parent and children nodes can be indicated. | 05-08-2014 |