Patent application number | Description | Published |
20090168727 | METHODS AND APPARATUS FOR SELECTING OR RESELECTING A HOME NODE-B (CLOSED SUBSCRIBER GROUP (CSG) CELL) AMONG CELLS HAVING COLLIDING PHYSICAL LAYER SIGNALS - A method and apparatus for selecting or reselecting a home Node-B (HNB), (i.e., a closed subscriber group (CSG) cell), among cells having colliding physical layer signals are disclosed. Once the identity (ID) of an HNB is determined, measurements needed to support cell selection or reselection are performed. A broadcast channel that broadcasts an HNB ID is detected and synchronized to, and information obtained from the broadcast channel is forwarded to a non-access stratum (NAS). The broadcasted HNB ID is checked against an HNB white-list provided by the NAS to determine whether the HNB is suitable for a wireless transmit/receive unit (WTRU). The WTRU selects the HNB to camp on, or changes from a cell currently serving the WTRU to the HNB if it is determined to be more suitable than the current serving cell. | 07-02-2009 |
20090202029 | OPTIMIZED PRIMARY SYNCHRONIZATION SEQUENCES FOR DEDICATED MULTIMEDIA BROADCAST/ MULTICAST SERVICE - A method optimizes a selection of primary synchronization channel (P-SCH) sequences from an available set of P-SCH indices for a dedicated Multimedia Broadcast/Multicast Service (MBMS). The criteria for selecting P-SCH indices include coprimeness, frequency offset sensitivity, multipath sensitivity, cross-correlation property in the time domain, auto-correlation property in the time domain and computation complexity at the receiver. | 08-13-2009 |
20090232108 | I/Q IMBALANCE ESTIMATION USING SYNCHRONIZATION SIGNALS IN LTE SYSTEMS - A method and apparatus perform I/Q imbalance estimation and compensation using synchronization signals in LTE systems. Primary and secondary synchronization signals (P-SCH and S-SCH), which carry synchronization information, are embedded in each LTE frame, and are used for receiver I/Q imbalance estimation. Additionally, the performance may be significantly improved by optimally selecting the training data in I/Q imbalance estimation. | 09-17-2009 |
20110205981 | MULTIPLEXING UPLINK L1/L2 CONTROL AND DATA - Methods and systems for transmitting scheduling requests in an LTE Advanced system are disclosed. Scheduling requests may be superimposed on HARQ ACK/NACK by multiplying the HARQ ACK/NACK by a value. Alternatively, scheduling requests may be channel-coded and multiplexed with other uplink control information. Scheduling requests can also be superimposed on reference signals by multiplying a reference signal by a value or by modulating a reference signal with a cyclic shift. Scheduling requests may also be jointly coded with HARQ ACK/NACK prior to transmission. Alternatively, ACK/NACK responses may be transmitted on assigned ACK/NACK PUCCH resources for a negative scheduling request transmission and on assigned scheduling request PUCCH resources for a positive scheduling request. Various collision handling mechanisms are also disclosed. | 08-25-2011 |
20110243066 | Uplink Control Data Transmission - Methods and systems for transmitting uplink control information and feedback are disclosed for carrier aggregation systems. A user equipment device may be configured to transmit uplink control information and other feedback for several downlink component carriers using one or more uplink component carriers. The user equipment device may be configured to transmit such data using a physical uplink control channel rather than a physical uplink shared channel. The user equipment device may be configured to determine the uplink control information and feedback data that is to be transmitted, the physical uplink control channel resources to be used to transmit the uplink control information and feedback data, and how the uplink control information and feedback data may be transmitted over the physical uplink control channel. | 10-06-2011 |
20110249578 | CHANNEL STATE INFORMATION TRANSMISSION FOR MULTIPLE CARRIERS - Channel state information is reported in periodic and aperiodic reports for multiple component carriers or serving cells. Channel state information may be reported for a subset of aggregated downlink carriers or serving cells. For an aperiodic report, the carrier(s)/serving cell(s) for which channel state information is reported are determined based on the request for the aperiodic report. When a CQI/PMI/RI report and a HARQ ACK/NACK report coincide in a subframe, the HARQ ACK/NACK report is transmitted on PUCCH, and the CQI/PMI/RI report is transmitted on PUSCH. | 10-13-2011 |
20120113831 | Determination of Carriers and Multiplexing for Uplink Control Information Transmission - Embodiments contemplate methods and devices that may select uplink (UL) transmission resources for transmitting uplink control information (UCI). A determination may be made that UCI should be transmitted. A physical channel resource for transmission of the UCI may be selected and a wireless transmit/receive unit (WRTU) may transmit the UCI over a physical uplink channel capable of supporting multiple component carriers using the selected physical channel resource. The selection of the physical channel resource may include at least one of: selecting a pre-determined UL component carrier (CC) for uplink transmission on a physical uplink control shared channel (PUSCH) upon a PUSCH resource being available in a subframe, or, selecting a pre-determined UL CC for uplink transmission on a physical uplink control channel (PUCCH) capable of UCI transmission in the subframe upon a PUSCH resource not being available in the subframe. | 05-10-2012 |
20130039284 | SYSTEMS AND METHODS FOR AN ENHANCED CONTROL CHANNEL - Methods and systems for sending and receiving an enhanced downlink control channel are disclosed. The method may include receiving control channel information via an enhanced control channel. The method may also include using the control channel information to receive a shared channel. The method may include detecting the presence of the enhanced control channel in a given subframe. The enhanced control channel may be transmitted over multiple antenna ports. For example, code divisional multiplexing and de-multiplexing and the use of common and UE-specific reference signals may be utilized. New control channel elements may be defined, and enhanced control channel state information (CSI) feedback may be utilized. The presence or absence of legacy control channels may affect the demodulation and or decoding methods. The method may be implemented at a WTRU. | 02-14-2013 |
20130083753 | DEVICE COMMUNICATION USING A REDUCED CHANNEL BANDWIDTH - Systems and/or methods for supporting communications at a reduced bandwidth with a full bandwidth network such as a long-term evolution (LTE) network may be disclosed. For example, inband assignments such as downlink assignments and/or uplink grants may be provided and/or received and transmissions may be monitored and/or decoded based on the inband assignment. Additionally, information (e.g. a definition or configuration) associated with an ePDCCH may be provided and/or received and ePDCCH resources may be monitored and/or decoded based on such information. An indication for support of a reduced bandwidth by the full bandwidth network may also be provided and/or received and control channels in the reduced or narrow bandwidth may be monitored and/or decoded based on the indication. A PRACH preamble and/or a multi-type subframe definition may also be provided and/or used for support of such a reduced bandwidth. | 04-04-2013 |
20130194950 | SYSTEMS AND/OR METHODS FOR MANAGING OR IMPROVING INTERFERENCE BETWEEN CELLS - Systems and methods for managing and/or improving interference in cells may be provided. For example, in embodiments, a partial-band Almost Blank Subframe (PB-ABS) subframe and/or a spatial Almost Blank Subframe (SABS) may be provided and/or used for coordinating communication with in networks with smaller and larger cells (e.g. pico or macro cells). For example, a PB-ABS may provide a dimension (e.g. frequency) that may be used to define a region and/or particular resources (e.g. resource blocks) reserved for pico cell operations or transmissions and a region or other resources (e.g. not those reserved for pico cell operations) available for macro cell operations or transmissions. Additionally, based on beam parameters (e.g. associated with cell partitioning), SABS may offer an additional dimension (e.g. spatial) that may be used to prevent transmission in a particular spatial direction. | 08-01-2013 |
20130208604 | Interference Measurement In Wireless Networks - Embodiments contemplate methods, systems, and apparatuses for interference measurement in a wireless communication network, including wireless communication networks the employ MIMO in uplink and/or downlink communication. Embodiments contemplate identifying one or more interference measurement resource elements that may be received from one or more transmission points. Embodiments also contemplate performing interference measurement estimation based at least in part on the identified one or more interference measurement resource elements. Channel state information (CSI) perhaps in the form of reports may be generated based at least in part on the one or more interference measurement estimation. Embodiments also contemplate that the CSI report may be transmitted to one or more nodes. In some embodiments, the one or more interference measurement resource elements may be received as part of a set of resource elements. | 08-15-2013 |
20140119270 | METHODS AND APPARATUS FOR HOME NODE-B DETECTION AND MEASUREMENTS THEREOF - A method and apparatus for selecting or reselecting a home Node-B (HNB), (i.e., a closed subscriber group (CSG) cell), among cells having colliding physical layer signals are disclosed. Once the identity (ID) of an HNB is determined, measurements needed to support cell selection or reselection are performed. A broadcast channel that broadcasts an HNB ID is detected and synchronized to, and information obtained from the broadcast channel is forwarded to a non-access stratum (NAS). The broadcasted HNB ID is checked against an HNB white-list provided by the NAS to determine whether the HNB is suitable for a wireless transmit/receive unit (WTRU). The WTRU selects the HNB to camp on, or changes from a cell currently serving the WTRU to the HNB if it is determined to be more suitable than the current serving cell. | 05-01-2014 |