Patent application number | Description | Published |
20120069798 | TIMING CONTROL IN A MULTI-POINT HIGH SPEED DOWNLINK PACKET ACCESS NETWORK - A method, apparatus, processing system, and computer program product enable association of mis-aligned subframes from a first and second downlink with one another, such that a HARQ acknowledgment message including jointly encoded feedback for the respective subframes can be correctly interpreted by the corresponding cells. Here, an RNC may provide an RRC message to the UE to associate particular subframes with one another. Further, the RNC may provide NBAP messages to the cells transmitting the downlink signals, so that the cells can associate the HARQ acknowledgment message with the appropriate subframe. Still further, additional signaling provides for changing the set of associated subframes when needed due to a drift in the timing offset between cells. | 03-22-2012 |
20120163185 | COMMUNICATING BETWEEN USER EQUIPMENT (UE) AND INDEPENDENT SERVING SECTORS IN A WIRELESS COMMUNICATIONS SYSTEM - A wireless communication system transmits in a High Speed Downlink Packet Access (HSDPA) by having a Radio Network Controller (RNC) assign portions of data to a first serving cell and a second serving cell for transmitting to a user equipment. The first serving cell transmits data on a first downlink carrier to the user equipment. The second serving cell, which is independent from the first serving cell, transmits data on a second downlink carrier to the user equipment. In an optional aspect, the RNC receives a measurement report from the user equipment on a first uplink carrier via at least one of the first serving cell and the second serving cell. | 06-28-2012 |
20120166917 | SYSTEM AND METHOD FOR PROVIDING H-ARQ RATE COMPATIBLE CODES FOR HIGH THROUGHPUT APPLICATIONS - In one embodiment, the present patent application comprises a method and apparatus to generate low rate protographs from high rate protographs, comprising copying a base graph; permuting end points of edges of a same type in copies of the base graph to produce a permuted graph; and pruning systematic input nodes in the permuted graph and the edges connected to them. In another embodiment, the present patent application comprises a method and apparatus to generate high-rate codes from low-rate codes, comprising puncturing a subset of codeword bits, wherein the step of puncturing a subset of codeword bits comprises regular-irregular puncturing the subset of codeword bits, random puncturing variable nodes, or progressive node puncturing variable nodes to obtain a desired code from a preceding code. | 06-28-2012 |
20120178381 | APPARATUS AND METHOD FOR UPLINK CLOSED LOOP TRANSMIT DIVERSITY - An apparatus, method, and computer program product operable to determine a phase of a beamforming weight vector utilizing a memory of a previously used phase for the beamforming weight vector, capable of improving a channel estimate. A base station transmits a beamforming weight vector to a user equipment based on a determined channel estimate. The user equipment selects between the received beamforming weight vector, or a modified beamforming weight vector having its phase shifted by −360°, in accordance with a suitable selection criteria. That is, the selection is made such that a difference between the phase of the selected beamforming vector and a phase of a prior beamforming vector is within a predetermined range. | 07-12-2012 |
20120178501 | MASTER-SLAVE ARCHITECTURE IN A CLOSED LOOP TRANSMIT DIVERSITY SCHEME - A base station receiver, a computer program product operable at a base station, and a method operable at a base station receiver, for receiving uplink transmit diversity transmissions utilizing a master/slave scheme at the receiver. One or more tracking loops, such as a searcher task, a time tracking loop, or a frequency tracking loop may be implemented at the base station receiver to determine compensation values, such as finger timings for a rake receiver or frequency compensation values, in accordance with characteristics of a first received pilot channel transmitted utilizing a first precoding weight vector. Here, corresponding compensation values may be derived for the reception of a secondary pilot channel transmitted utilizing an precoding weight vector orthogonal to the first precoding weight vector, simply based on those determined for the first pilot channel. | 07-12-2012 |
20120213092 | APPARATUS, METHOD, AND SYSTEM FOR UPLINK CONTROL CHANNEL RECEPTION IN A HETEROGENEOUS WIRELESS COMMUNICATION NETWORK - A method and system for improving the reception of uplink transmissions in a heterogeneous wireless communication system includes a high-power node such as a macro-cell and a low-power node such as a femto-cell or pico-cell. To address an uplink imbalance where a nearby low-power node power controls a UE such that uplink transmissions of an HSDPA control channel are poorly received at the serving cell, an RNC can instruct the UE to boost its uplink transmit power, remove the UE from soft handover, or disable power control of the UE by the low-power node. To address inter-cell interference, the RNC can limit the UE transmit power and/or enable the victim cell to suppress the interference. Further, a common control channel can be used to power control UEs outside of the convention set of UEs available for power control. | 08-23-2012 |
20120281564 | SYSTEM AND METHOD FOR MULTI-POINT HSDPA COMMUNICATION UTILIZING A MULTI-LINK PDCP SUBLAYER - A method and apparatus for wireless communication may provide a multi-link PDCP sublayer in a radio network controller capable of allocating PDCP PDUs among a plurality of RLC entities for use in a multi-point HSDPA network. Some aspects of the disclosure address issues relating to out-of-order delivery of the PDCP PDUs to a UE, such as unnecessary retransmissions. That is, the disclosed multi-link PDCP may be capable of distinguishing between sequence number gaps that are caused by physical layer transmission failures and those caused merely by skew. | 11-08-2012 |
20130064181 | CLOSED LOOP TRANSMIT DIVERSITY IN CONTINUOUS PACKET CONNECTIVITY - Apparatus and methods for communicating in a wireless network include receiving a weight vector in a slot for providing closed loop transmit diversity to signals in a next slot, holding the weight vector over a plurality of slots following a transmission burst, and applying the weight vector to signals in at least one slot of a subsequent transmission burst in discontinuous transmit. Additional apparatus and methods for communicating in a wireless network include determining a weight vector based on signals received from a device to provide closed loop transmit diversity feedback to the device, holding the weight vector over a plurality of slots following receiving a transmission burst, and applying the weight vector for signals received in at least one slot of a subsequent transmission burst from the device. | 03-14-2013 |
20140016603 | DEDICATED REFERENCE SIGNAL DESIGN FOR NETWORK MIMO - Aspects describe utilizing a dedicated reference signal for supporting Network MIMO, distributed MIMO, Coordinated MultiPoint, and the like. A data modulation symbol is transmitting in the same direction as a pilot modulation symbol is transmitted. Two or more wireless devices can coordinate communications such that transmission of the same pilot modulation symbol and the same data modulation symbol are transmitted to a device in different directions, each direction associated with a wireless device and intended for a particular mobile device. Cluster-specific scrambling and/or user-group specific scrambling can be employed and a scrambling code can be communicated prior to transmission of the pilot modulation symbols and data modulation symbols. | 01-16-2014 |
20140112267 | RECEIVE DIVERSITY CONTROL IN TD-SCDMA - In a TD-SCDMA user equipment (UE) with multiple receive chains, receive diversity may be implemented where multiple receive chains may simultaneously activate to receive downlink signals. Receive diversity may be enabled when single chain reception provides undesired results and when receive diversity will not impact power consumption too much. A state machine controls receive diversity operation based on operating conditions such as control channel activity, successful control channel decoding, signal-to-interference ratio, and other factors. | 04-24-2014 |
20140133319 | RECEIVE DIVERSITY CONTROL IN TD-SCDMA - In a TD-SCDMA user equipment (UE) with multiple receive chains, receive diversity may be implemented where multiple receive chains may simultaneously activate to perform reception on downlink signals. Receive diversity may be enabled when single chain reception provides undesired results and when receive diversity will not impact power consumption too much. A state machine may be implemented to control receive diversity operation based on operating conditions such as an error rate, signal-to-interference ratio, and other factors. | 05-15-2014 |
20140146742 | APPARATUS AND METHOD OF INTER-RADIO ACCESS TECHNOLOGY SEARCHING - Aspects of radio access technology searching include apparatus and methods for obtaining relative synchronization information between a first radio access technology and a second radio access technology, and determining a time location of a pilot signal of the second radio access technology based on the relative synchronization information. Further aspects include searching for the pilot signal of the second radio access technology using the determined time location. Other aspects further include determining a measurement gap duration and measurement gap location based on the relative synchronization information so as to encompass a pilot of the second radio access technology. | 05-29-2014 |