Patent application number | Description | Published |
20100238824 | FEEDBACK MECHANISMS FOR BEAMFORMING OPERATION - A method for generating feedback data is described. A downlink message is received from a base station. It is determined whether full channel reciprocity or partial channel reciprocity is enabled at a transmitter. A mode for feedback data generation is determined. Feedback data is generated using the determined mode. The feedback data includes beamforming information. The feedback data is transmitted to the base station. The feedback data may include a channel quality indicator (CQI) and a rank. | 09-23-2010 |
20100246527 | METHODS AND APPARATUS FOR GENERATION AND USE OF REFERENCE SIGNALS IN A COMMUNICATIONS SYSTEM - Apparatus and methods for generation and use of reference signals in a wireless communications system are described. A group-specific reference signal pattern may be generated for provision to a group of UEs or terminals in communication with an eNodeB or base station. The reference signal may be generated based on system parameters. Reference signals may be generated to span multiple contiguous physical resource blocks. | 09-30-2010 |
20110205954 | EXTENSION OF UE-RS TO DWPTS - Systems and methodologies are described that facilitate sending and/or receiving user equipment specific reference signals (UE-RSs) in a wireless communication environment. A UE-RS pattern can be selected, yielded, etc. based upon a number of symbols from a subframe utilized for downlink transmission. At least one time domain component of the UE-RS pattern can vary based upon the number of symbols from the subframe utilized for the downlink transmission. For instance, the at least one time domain component can be punctured, time-shifted, and so forth. Further, UE-RSs can be mapped to resource elements of the subframe as a function of the UE-RS pattern. Moreover, a UE can utilize the UE-RS pattern to detect UE-RSs on the resource elements of the subframe. Further, the UE can estimate a channel based upon the UE-RSs. | 08-25-2011 |
20110237267 | UE-RS SEQUENCE INITIALIZATION FOR WIRELESS COMMUNICATION SYSTEMS - Pseudo-random sequences of a plurality of user equipment specific reference signals (UE-RSs) for use by a plurality of user equipments (UEs) are initialized, the initialization of each pseudo-random sequence associated with each UE-RS being independent of a specific UE identifier and independent of a resource bandwidth assigned to a specific UE. Pseudo-random sequences of the UE-RSs are generated. At least one of the pseudo-random sequences is mapped to a portion of common resources for at least one UE among the plurality of UEs. | 09-29-2011 |
20110244877 | METHOD AND APPARATUS FOR USING CHANNEL STATE INFORMATION REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for wireless communication is disclosed which includes selecting a first resource pattern comprising resource elements that are non-colocated with a second resource pattern and allocating the first resource pattern to a plurality of antennas for transmitting a channel state information reference signal. | 10-06-2011 |
20110252139 | METHOD AND APPARATUS FOR PUNCTURING DATA REGIONS FOR SIGNALS TO MINIMIZE DATA LOSS - Methods and apparatuses are provided that facilitate puncturing codeblocks in resource blocks for muting or transmitting signals of a disparate technology such that the puncturing similarly impacts the codeblocks. Codeblocks can be mapped in order across frequency in a given data symbol before moving to a next data symbol. In this regard, utilizing data resource elements substantially evenly spaced across frequency and across data symbols in a data resource block for transmitting signals of the disparate technology can substantially equalize impact of the puncturing to related codeblocks. In addition, resources can be allocated to legacy devices, devices with bandwidth, data rate, or quality of service requirements, devices of a certain rank or geometry, etc., based at least in part on the puncturing. Moreover, a modulation and coding scheme can be selected for generating codeblocks based at least in part on the puncturing and its effect on performance. | 10-13-2011 |
20110268050 | APPARATUS AND METHOD FOR JOINT ENCODING OF USER SPECIFIC REFERENCE SIGNAL INFORMATION IN WIRELESS COMMUNICATION - An apparatus and method for providing encoded information pertaining to a user-specific reference signal associated with a user equipment in a multiple access wireless communication system are provided. The encoded information jointly indicates a rank of transmission together with at least one parameter relating to the user-specific reference signal, such as a set of antenna ports and a user-specific reference signal pattern. The encoded information is transmitted in a downlink control channel to reduce overhead in the channel. | 11-03-2011 |
20110268100 | METHOD AND APPARATUS FOR HIERARCHICAL CODEBOOK DESIGN IN WIRELESS COMMUNICATION - A method for use in a multi-user, multi-input multi-output (MU-MIMO) system includes generating a family of codebooks comprising at least one codebook set, the codebook set comprising a plurality of codebooks organized base on a transmission rank and providing the family of codebooks for use in a multiple description coding (MDC) channel feedback scheme. | 11-03-2011 |
20130094462 | SUPPORTING MULTIPLE ACCESS TECHNOLOGIES IN A WIRELESS ENVIRONMENT - Support for multiple wireless access technologies in a common radio access network is provided. In one aspect, a method of wireless communication includes determining whether to map a shared data channel to at least one resource element. The mapping determination is based at least in part on whether the shared data channel is associated with a legacy wireless technology or an advanced wireless technology. The method further includes transmitting the shared data channel based at least in part on the mapping determination and transmitting a reference signal in the at least one resource element. | 04-18-2013 |
20130343497 | NON-PRIMARY PILOT CHANNEL DISCOVERY FOR INTERFERENCE CANCELLATION - Methods and apparatus are described for processing a signal in a communication system. A signal may be received a user equipment, and a pilot transmission from a non-primary transmit antenna of a cell in the communication system may be detected in the signal based on metrics associated with a pilot channel. Information about the pilot channel is not signaled to the user equipment. The detected pilot transmission is used to improve receiver processing of the signal. | 12-26-2013 |
20140036824 | METHODS AND APPARATUS OF ADAPTING NUMBER OF ADVERTISED TRANSMIT ANTENNA PORTS - Apparatuses and methods of advertising antenna ports to UEs is provided. In an aspect, a device may receive an advertisement regarding transmit antenna ports for legacy UE operation and transmit antenna ports for advanced UE operation. The advertisement may indicate a number of transmit antenna ports set for legacy UE operation and a different number of transmit antenna ports set for advanced UE operation. The device may also receive all control channels for legacy and advanced UE operation via the transmit antenna ports for legacy UE operation, and receive first reference signals via the transmit antenna ports for legacy UE operation and second reference signals via the transmit antenna ports for advanced UE operation. The first reference signals are received in all subframes, and the second reference signals are received in a subset of all the subframes based at least in part on a subframe configuration. | 02-06-2014 |
20140247739 | METHOD AND APPARATUS FOR HIERARCHICAL CODEBOOK DESIGN IN WIRELESS COMMUNICATION - Methods and apparatuses for wireless communication are provided. In an aspect, the method includes receiving a plurality of channel quality reports based on a multiple description coding schedule and determining a transmission parameter based on the plurality of channel quality reports. In another aspect, the method includes receiving a family of codebooks organized based on a transmission rank, and reporting, using a multiple description coding scheme, a channel quality parameter using a codebook entry from the family of codebooks. | 09-04-2014 |
20150049672 | METHODS AND APPARATUS FOR AVOIDING OR ESCAPING CELL RANGE EXPANSION (CRE) IN A HETEROGENEOUS NETWORK - Certain aspects relate to methods and apparatus for avoiding and/or escaping cell range expansion (CRE) in a heterogeneous network (HetNet). A user equipment (UE) may detect the occurrence of one or more conditions while the UE is in a region of cell range expansion (CRE) in which the UE may be handed over from a first cell of a first power class type to a second cell of a second power class type, the second power class type being lower than the first power class type. The UE may take action to stop being served by the second cell or avoid being handed over to the second cell in response to the detection. | 02-19-2015 |