Google Inc.

Motorola Mobility LLC

Samsung Electronics Co., Ltd.

Sandeep H Krishnamurthy

Robert T Love

Colin D Frank

Ravi Kuchibhotla

Vijay Nangia

Ajit Nimbalker

Ravikiran Nory

Murali Narasimha

Kenneth Anderson Stewart

Tyler A Brown

Xiangyang Zhuang

Hyejung Jung

Michael Eoin Buckley

Jungwon Lee

Hyukjoon Kwon

Linbo Li

Krishna Kamal Sayana

Ravi Nory

A wireless terminal receives signaling information, pertaining to a reference signal transmission in at least one specifically designated sub frame, the signaling information including a list, the list including base station identities. The terminal determines, from at least one of the base station identities in the list, the time-frequency resources associated with a reference signal transmission intended for observed time difference of arrival (OTDOA) measurements from a transmitting base station associated with said one base station identity. The time of arrival of a transmission from the transmitting base station, relative to reference timing, is measured. The wireless terminal can receive a command from a serving cell to start performing inter-frequency OTDOA measurement on a frequency layer containing reference signals, the frequency layer distinct from the serving frequency layer, the serving frequency layer not containing positioning reference signals. The wireless terminal can perform OTDOA measurements subsequent to the reception of the command on a carrier frequency different from the serving cell carrier frequency. A base station transmitter can jointly schedule a reference signal transmission from a plurality of base station transmitters for the purpose of OTD estimation enhancement, and transmit identical reference signals from the plurality of base station transmitters, the reference signals being identical both in the signal sequence and time-frequency resources used for transmission.

Interference control, SINR optimization and signaling enhancements to improve the performance of OTDOA measurements

Apparatuses, systems, and methods are described concerning a new type of superposition multiplexing transmission constellation (super-constellation): the Gray-mapped Non-uniform-capable Constellation (GNC). Apparatuses, systems, and methods for generating GNC super-constellations are described, as well as apparatuses, systems, and methods for receiving, demapping, and decoding transmissions using GNC super-constellations. Apparatuses, systems, and methods for selecting a type of superposition multiplexing transmission constellation based on various conditions are also described.

Apparatus and method for superposition transmissions

Apparatuses, systems, and methods are described for power allocation in a superposition multiple access communication system capable of using non-uniform joint constellations or super-constellations. In one method, the conditional probability of a correctly-received symbol and a normalized weighting coefficient is calculated for each receiver and then the sum of weighted efficiencies is calculated. The optimal power allocation is determined for each receiver by maximizing the sum of weighted spectral efficiencies.

Power allocation for superposition transmission

Disclosed are methods for allowing a wireless communication device (or 'user equipment' or 'UE') to receive signaling information when there is a power imbalance between a primary cell (&#x201c;Pcell&#x201d;) and a New Carrier Type (&#x201c;NCT&#x201d;) secondary cell (&#x201c;Scell&#x201d;). In one aspect, the UE reduces its downlink bandwidth to cover only a carrier of the Pcell, receives control signaling information, if present, and then increases its bandwidth to cover carriers of both the Pcell and Scell.

Reducing the effects of interference experienced by a communication device

Disclosed are methods for codebook sub-sampling. In various implementations, a wireless terminal receives a reference signal, determines, based on the reference signal, a first precoding index ifor a first subband and a second precoding index i'for a second subband. The wireless terminal transmits a representation of iand a representation of i&#x2032;to a base station. In various implementations, i&#x2032;belongs to the set Swhich, in one implementation, equals {mod(i&#x2212;K+k,K), k=0, 1, . . . , K}, where K&#x3e;1, and where K&#x3e;1 and K&#x3e;1 are integers. According to an implementation, the wireless terminal receives the reference signal from a first base station and transmits the representations of iand i&#x2032;to a second base station.

Methods for codebook sub-sampling

This disclosure sets forth methods and devices for communication between mobile devices and base stations with active and dormant states. In an embodiment, a base station transmits system information during an active state of the base station with at least one system-information message. The at least one system-information message includes a SystemInformationBlockType1 ('SIB1') message with a first update-indicator field. The base station selects an update value that indicates whether the system information has changed since a previous transmission of a previous SIB1 message. The base station transmits at least one dormant-state message during a dormant state of the base station with the selected update value in a second update-indicator field of the at least one dormant-state message.

Methods and devices for cell discovery

A mobile station in a wireless communication network is disclosed. The mobile station includes a transceiver coupled to a processor configured to perform measurements of signals of one or more cells of a wireless communication system during a first set of subframes, to cause the transceiver to transmit a measurement report including at least the measurements of signals of the one or more cells, and to indicate that the measurements of the one or more cells were performed during the first set of subframes.

Configuring unscheduled periods to enable interference reduction in heterogeneous networks

A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier based on a signal characteristic of the first component carrier and a signal characteristic of the second component carrier, and providing signal interference information to a serving base station if the determined interference level satisfies a condition.

IQ imbalance image compensation in multi-carrier wireless communication systems

A wireless communication terminal including a controller coupled to a transceiver wherein the controller is configured to determine a synchronization based on a mapping of channel state information to decoder error rate corresponding to a hypothetical control code word, to attempt to decode a control codeword in a received signal, and to conclude that an out of synchronization event has not occurred if the control codeword is decoded successfully regardless of an indication of the mapping.

Radio link synchronization in a wireless communication device

A wireless communication terminal is disclosed. The terminal includes a transceiver coupled to a processor configured to determine that a subset of a plurality of resource elements (REs) must be excluded from demodulation, the plurality of REs received in a signal from a first base station, to estimate a hypothetical block error rate (BLER) based on the signal received from the first base station by excluding the subset of the plurality of REs, and to estimate channel state information based on the hypothetical BLER.

Interference measurements in enhanced inter-cell interference coordination capable wireless terminals

A base station communicates a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols. Upon receiving the subframe, a wireless communication device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing (e.g., time of arrival) information.

Growing community of inventors

Mountain View, CA, United States of America

Sandeep H Krishnamurthy