Patent application number | Description | Published |
20080232432 | NON-COHERENT TRANSMISSION METHOD FOR UPLINK CONTROL SIGNALS USING A CONSTANT AMPLITUDE ZERO-AUTOCORRELATION SEQUENCE - In one embodiment of the instant invention, a non-coherent transmission method for uplink control signals is provided. The transmission methodology uses a constant amplitude zero-autocorrelation (CAZAC) sequence for relatively short control signal lengths. The methodology includes creating a CAZAC sequence, truncating the CAZAC sequence into a plurality of segments; and transmitting each of the segments within a predetermined window of time. | 09-25-2008 |
20080267134 | RANDOM ACCESS CHANNEL MESSAGE FORMAT FOR AN EXTENDED RANGE WIRELESS COMMUNICATION SYSTEM - The present invention provides a method for transmitting and receiving random access channel messages in an extended range wireless communication system. One embodiment of the method may include accumulating, at a base station, signal energy received during a first portion of a transmission time interval. The method may also include accumulating, at the base station, signal energy received during a second portion of the transmission time interval. The first and second portions are offset from the start or end of the transmission time interval by selected delay intervals. The method may further include detecting the message(s) based on the signal energy accumulated during the first and second portions of the transmission time interval. | 10-30-2008 |
20080316959 | METHOD OF TRANSMITTING SCHEDULING REQUESTS OVER UPLINK CHANNELS - In various embodiments of the present invention, methods are provided for transmitting scheduling requests over uplink channels. One embodiment includes determining whether a first resource for transmission of a scheduling request over an unscheduled uplink control channel is allocated concurrently with a second resource for transmission of user data over a scheduled uplink shared channel. This embodiment also includes encoding the user data and bit(s) of control information to form encoded information for transmission using the second resource. The additional bit(s) indicate whether the mobile unit is transmitting the scheduling request. Another embodiment includes determining whether a first resource for transmission of a scheduling request over an unscheduled uplink control channel is allocated concurrently with a second resource for transmission of other control information over the unscheduled uplink control channel. This embodiment includes modulating the scheduling request and the other control information into one symbol for transmission using the first resource. | 12-25-2008 |
20090088178 | LOAD CONTROL FOR WIRELESS BASE STATION - A method of controlling a load at a wireless communication base station includes determining an indication of a maximum path loss between the base station and any high speed data users currently in a cell served by the base station. A target loading limit for the cell is set based upon the determined indication of the maximum path loss. In disclosed examples, the indication of the maximum path loss corresponds to a distance between a high speed user and a base station. Another factor considered in disclosed examples includes the data rate of such a high speed user. | 04-02-2009 |
20100113050 | CARRIER AGGREGATION FOR OPTIMIZING SPECTRUM UTILIZATION - An exemplary method of allocating bandwidth to a call for at least one user includes allocating 10 MHz of the bandwidth for a downlink between a base station and the at least one user. 5 MHz of the bandwidth are allocated for an uplink between the user and the base station. A selected amount of bandwidth is aggregated to the allocated 5 MHz for the uplink. The amount of bandwidth that is aggregated is at least one of an additional 3 MHz band or two additional 1.4 MHz bands. | 05-06-2010 |
20100322158 | INDICATING DYNAMIC ALLOCATION OF COMPONENT CARRIERS IN MULTI-COMPONENT CARRIER SYSTEMS - The present invention provides a method involving an access network and user equipment that supports communication over an air interface using a plurality of component carriers. The method includes transmitting information indicating that a first component carrier is an anchor carrier for the user equipment. The information is transmitted from the access network in a first field of the first component carrier, which selected from the plurality of component carriers. The method also includes transmitting information indicating that one or more second component carriers is allocated as a non-anchor carrier for the user equipment. | 12-23-2010 |
20110081913 | METHOD OF BANDWIDTH EXTENSION BY AGGREGATING BACKWARDS COMPATIBLE AND NON-BACKWARDS COMPATIBLE CARRIERS - Methods of component carrier aggregation are provided. One embodiment of the method includes aggregating, at a base station, one or more first component carriers that are backwards compatible with a first carrier type and one or more second component carriers that are non-backwards compatible with the first carrier type for communication with first user equipment according to a second carrier type used by the second component carrier(s). | 04-07-2011 |
20110268001 | METHOD OF PROVIDING ACKNOWLEDGEMENT FEEDBACK FOR AGGREGATED CARRIERS - The present invention provides a method and apparatus for providing acknowledgment feedback for aggregated downlink component carriers. One embodiment of the method includes determining acknowledgment bits for downlink component carriers that are aggregated to a particular user equipment. Each acknowledgment bit indicates whether a corresponding downlink component carrier was successfully received. This embodiment also includes transmitting symbol constellations representative of the acknowledgment bits in resources of one or more uplink control channels of the uplink component carrier. | 11-03-2011 |
20120218957 | METHOD AND APPARATUS FOR MULTIPLEXING CODE DIVISION MULTIPLE ACCESS AND SINGLE CARRIER FREQUENCY DIVISION MULTIPLE ACCESS TRANSMISSIONS - The present invention provides a method and apparatus for multiplexing code division and frequency division transmissions. One embodiment of the method includes accessing at least one first symbol and at least one second symbol, encoding the at least one first symbol according to a frequency division protocol, and encoding the at least one second symbol using a coding sequence having a cyclic correlation property. The method also includes transmitting a radiofrequency signal indicative of the at least one encoded first symbol and the at least one encoded second symbol. | 08-30-2012 |
20130116011 | BASE STATION AND RADIO UNIT FOR CREATING OVERLAID SECTORS WITH CARRIER AGGREGATION - The embodiments relate to a base station and/or radio unit for creating overlaid sectors with carrier aggregation. The radio unit includes a first antenna array including a plurality of first antenna elements. The plurality of first antenna elements are arranged to provide wireless coverage for user equipments on a first frequency carrier in a first coverage area of a cell site. The radio unit also includes a second antenna array including a plurality of second antenna elements. The plurality of second antenna elements are arranged to create at least one sector for providing wireless coverage for the user equipments on a second frequency carrier in a second coverage area within the first coverage area. The radio unit also includes a central unit configured to dynamically adjust one of a location of the second coverage area within the first coverage area and a size of the second coverage area. | 05-09-2013 |
Patent application number | Description | Published |
20080267157 | Method and apparatus for packet wireless telecommunications - In a wireless telecommunications network, a Code Division Multiple Access (CDMA) scheme is applied to data to encode it. The encoded data transmitted in the uplink using an Orthogonal Frequency Division Multiplexing (OFDM) frame structure including a cyclic prefix (CP). The CDMA encoded data may be time multiplexed with Single Carrier-Frequency Division Multiple Access (SC-FDMA) transmissions. The CDMA transmissions may be used for relatively small payloads, such as those associated with voice traffic and control signals, and the SC-FDMA transmissions used for higher date rate transmissions. This enables autonomous transmission, without scheduling, for smaller payloads. A transmitter includes a selector | 10-30-2008 |
20110103499 | METHOD FOR RANGE EXTENSION IN WIRELESS COMMUNICATION SYSTEMS - The present invention provides a method for range extension is wireless communication systems. One embodiment of the method includes determining whether a mobile unit is within a first range corresponding to a range of timing advances supported by a timing advance command. This embodiment also includes transmitting a plurality of timing advance commands to the mobile unit when the mobile unit is outside the first range so that the mobile unit can synchronize with the base station by combining information in the plurality of timing advance commands. | 05-05-2011 |
20110124347 | Method And Apparatus for UE Positioning in LTE Networks - Methods and apparatuses are provided for user equipment positioning in networks. An example method includes computing a location of a user equipment (UE). The computing includes joint scheduling of UL subframes and receiving a Up Link Positioning Reference Signal (UL-PRS). The computing is performed by a network equipment that serves at least one cell site. The UL-PRS is received in a known subframe. The computing may also include estimating an arrival time the UL-PRS from the UE for a plurality of cell sites. In another embodiment, the computing includes determining a one-way delay between | 05-26-2011 |
20110292816 | CONFIGURABLE RANDOM ACCESS CHANNEL STRUCTURE FOR RANGE EXTENSION IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method involving a configurable random access channel structure. One embodiment of the method includes generating a random access channel burst that includes a cyclic prefix and a selected number of repetitions of a preamble. The number of repetitions is selected based on at least one of a cell radius and a radio transmission frequency. This embodiment of the method also includes transmitting the random access channel burst over an air interface. | 12-01-2011 |
20130235807 | VIRTUAL SECTORIZATION USING AN ACTIVE ANNTENNA ARRAY - Embodiments of the claimed subject matter provide a method and apparatus for virtual sectorization using an active antenna array. Embodiments of the apparatus include a transmitter for providing signals to an active antenna array. The signals cause the active antenna array to transmit a first reference signal to a first sector indicated to user equipment within the first sector by a sector identifier. The signals also cause the active antenna array to transmit a plurality of second reference signals into a corresponding plurality of second virtual sectors that overlap the first sector. The apparatus also includes a scheduler for scheduling transmission to user equipment based on feedback generated by the user equipment using the first reference signal or the second reference signals. | 09-12-2013 |
20140169303 | CONFIGURABLE RANDOM ACCESS CHANNEL STRUCTURE FOR RANGE EXTENSION IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method involving a configurable random access channel structure. One embodiment of the method includes generating a random access channel burst that includes a cyclic prefix and a selected number of repetitions of a preamble. The number of repetitions is selected based on at least one of a cell radius and a radio transmission frequency. This embodiment of the method also includes transmitting the random access channel burst over an air interface. | 06-19-2014 |