Patent application number | Description | Published |
20090225721 | HIERARCHICAL PILOT STRUCTURE IN WIRELESS COMMUNICATION SYSTEMS - A method for communicating control channel information in a wireless communication system, including transmitting a super-frame having a time-frequency resource region containing an allocation control channel and multiple pilot elements, at least some of which are associated with the allocation control channel, and indicating, in a configuration information control channel of the super-frame, a characteristic of the pilots elements associated with the allocation control channel. | 09-10-2009 |
20100046643 | FEEDFORWARD OF NON-QUANTIZED PRECODING WEIGHTS IN A WIRELESS COMMUNICATIONS SYSTEM - An apparatus and method to feedforward non-quantized precoding weights in an OFDM communication system includes a first step ( | 02-25-2010 |
20130088978 | Joint Encoding of Rank and CQI Feedback For Comp - A method to reduce feedback overhead for CoMP operation is described. The method includes deriving a set of CSI for a coordinated multi-point transmission received at a UE over a plurality of radio links Each CSI of the set of CSI pertains to a radio link of the plurality of radio links. The plurality of radio links includes a first link from a serving transmission point and at least one multi-point link from at least one non-serving transmission point to the UE. The method also includes jointly encoding at least two CSI from the set of CSI. Apparatus and computer readable media are also described. | 04-11-2013 |
20130094604 | Precoding For Coordinated Multi-Point Joint Transmission - The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for implementing precoding for a coordinated multi-point joint transmission in LTE wireless systems using a specific product structure for a multi-point precoding matrix with designed and/or specified usage of multi-point codebooks for generating spatial data stream between a UE having multiple antennas and a plurality of cells. | 04-18-2013 |
20130242748 | HIERARCHICAL NETWORK AND INTERFERENCE MANAGEMENT - The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for network management through a hierarchical architecture with a control functionality of a network server (e.g., C-SON) in relationship to clusters comprising eNBs (access points), and for implementing coordinated multi-point (CoMP) transmission and reception in conjunction with inter-cell interference coordination (ICIC) in wireless networks such as LTE wireless networks. In particular, embodiments of the invention describe control and coordination mechanisms among the network elements for different network architectures and use-case scenarios. Such mechanisms may be managed by a centralized self-organizing network controller such as C-SON and hierarchically via localized controllers (such as cluster coordinators) residing in macro eNBs depending on system architectural constraints and network state. A fault-tolerant mechanism then may be defined to recover from failure of controlling sub-elements so that the network remains stable at all times. | 09-19-2013 |
20130259151 | Codebook Feedback Method for Per-User Elevation Beamforming - A method of operating an array of antennas in a wireless communication system to provide user-specific azimuth and elevation beamforming is described. The method includes providing a product codebook structure consisting of both an azimuth and elevation portion. A receiver receives reference signals from a transmitter corresponding to both the azimuth and elevation portions of the array of antennas. The method also includes determining the index of the azimuth codebook portion of the product codebook from the azimuth portion of the received reference signals and determining the index of the elevation codebook portion of the product codebook from the elevation portion of the received reference signals. Apparatus and computer readable media are also described. | 10-03-2013 |
20130272151 | Reference Signal Design And Signaling For Per-User Elevation MIMO - A method to use RSs for per-user elevation beamforming is described. An eNB sends, to a UE, an indication of which RSs in a plurality of RSs sound in the elevation dimension and which RSs in the plurality of RSs sound in the azimuthal dimension. Then, the eNB sends to the UE, the plurality of RSs using a plurality of antenna. The UE separates the plurality of RSs into the first portion and the second portion based at least in part on the indication and sends elevation and azimuthal feedback based on the received RSs to the eNB. The eNB determines beamforming weights for the plurality of antenna based at least in part on the elevation feedback and the azimuthal feedback. Apparatus and computer readable media are also described. | 10-17-2013 |
20130279350 | Methods and Apparatus for Interference Management - Methods and apparatus for identifying interference when prevailing conditions give rise to a suspicion of interference. Upon detection by one or more elements of a wireless network that interference may be present, measurements are directed to provide information indicating whether interference is present and whether the interference is severe enough to warrant interference mitigation. The information is analyzed to determine if severe interference is in fact present, and interference mitigation measures are directed if severe interference is identified. Analysis may include identifying one or more dominant interferers, and may further include directing additional measurements and analyzing information provided thereby in order to identify one or more dominant interferers. | 10-24-2013 |
20130310019 | CELL RANGE EXTENSION FOR COOPERATIVE MULTIPOINT - A user equipment UE takes measurements of at least a first and a second transmission point. The UE applies a bias value in favor of the second transmission point to at least one of the measurements, and thereafter utilizes the measurements after the bias value is applied to select a set of transmission points to recommend for cooperative multipoint CoMP transmissions. In more specific examples: the first and second transmission points are respective macro and micro/pico cells, and the UE further measures channel state information CSI from each transmission point of the selected CoMP set and reports that without applying the bias value to any of them. The examples show this approach works even if the cells share a common physical cell ID PCID. | 11-21-2013 |