Ntt Docomo, Inc.

University of Southern California

The Ohio State University

Samsung Electronics Co., Ltd.

Electronics and Telecommunications Research Institute

King Fahd University of Petroleum and Minerals

Princeton University

Quantenna Communications, Inc.

Giuseppe Caire

Haralabos Papadopoulos

Sean Anthony Ramprashad

Hooman Shirani-Mehr

Hesham El Gamal

Fei Sha

Atilla Eryilmaz

Margaret McLaughlin

Ozgun Bursalioglu Yilmaz

Carl-Erik W Sundberg

Konstantinos Psounis

Dong Seung Kwon

Seung Joon Lee

Tareq Yousuf Al-Naffouri

Harold Vincent Poor

Maria Fresia

Christine Pepin

Horia Vlad Balan

Ahmed Abdul Quadeer

Dilip Bethanabhotla

A proactive networking system and method is disclosed. The network anticipates the user demands in advance and utilizes this predictive ability to reduce the peak to average ratio of the wireless traffic and yield significant savings in the required resources to guarantee certain Quality of Service (QoS) metrics. The system and method focuses on the existing cellular architecture and involves the design and analysis of learning algorithms, predictive resource allocation strategies, and incentive techniques to maximize the efficiency of proactive cellular networks. The system and method further involve proactive peer-to-peer (P2P) overlaying, which leverages the spatial and social structure of the network. Machine learning techniques are applied to find the optimal tradeoff between predictions that result in content being retrieved that the user ultimately never requests, and requests that are not anticipated in a timely manner.

Predictive network system and method

A method and apparatus is disclosed herein for scheduling, load balancing and/or pilot assignment in MIMD cellular deployments (e.g., reciprority-based MIMO cellular deployments). In one embodiment, the method comprises receiving, by the central controller from at least one AP, for at least one user terminal, a size of a user set and user rate information indicative of a rate that can be provided to the user terminal when served in a group of one or more user terminals; and determining, by the central controller, based on user rate information and the user set size, an allocation of AP resources among the user terminals for the at least one AP.

Method and apparatus for scheduling, load balancing, and pilot-assignments in reciprocity-based MIMO cellular deployments

A method and apparatus is disclosed herein for internal relative transceiver calibration. In one embodiment, the method comprises generating a plurality of processed observations corresponding to pilots transmitted by transceiver units in the entity and observations of the pilots by transceiver units in the entity, each processed observation being indicative of a combined response of a pilot transmitted by transmitter hardware of one transceiver unit at the entity and an observation of the pilot by receiver hardware of another transceiver unit at the entity; grouping the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises: a first observation indicative of a combined response between transmitter hardware of a first transceiver unit and receiver hardware of a second transceiver unit in the entity, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit and receiver hardware of the first transceiver unit in the entity; and calculating, based on at least one of observation pairs, relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit and is relative with respect to a transceiver of a reference unit at the entity.

Method and apparatus for internal relative transceiver calibration

A system for coordinating a WLAN including MIMO WAP nodes supporting WLAN communications with an associated set of station nodes on a shared OFDM communication channel. A primary beam coordinator aggregates channel state information (CSI) for communication links and crosslinks between each WAP node and both associated and non-associated station nodes and extrapolates therefrom spatially distinct primary beam pattern setup options for each of the WAP nodes to enable substantially non-interfering concurrent downlink communications between each WAP node and a corresponding subset of its associated station nodes. The WAP nodes select a corresponding one of the primary beam options together with its associated stations as provided by the primary beam coordinator and generate the corresponding selected primary beam option for subsequent downlink communications to the associated subset of station nodes.

Composite beamforming to coordinate concurrent WLAN links

A method and apparatus is disclosed herein for performing wireless communication. In one embodiment, the apparatus comprises a processing unit to run a scheduling selection algorithm to update user terminal scheduling weights in response to scheduling feedback transmitted by a plurality of user terminals by an end of an immediately preceding scheduling event; a scheduler and precoder, responsive to the updated user terminal scheduling weights generated by the scheduling algorithm and channel estimates of user terminals, to choose a set of user terminals for scheduling and to choose precoder beams and their power for such user terminal in the set of user terminals; a plurality of precoding blocks to receive one coded ARQ block for at least one packet for each user terminal in the set and, responsive to the precoder beams, to generate precoded data, where the one coded ARQ block is one of a plurality of ARQ blocks generated for a single packet and being generated using a single ARQ scheme for such each user terminal; and a transmitter to transmit the precoded data using MIMO transmission.

Method and apparatus for the joint design and operation of ARQ protocols with user scheduling for use with multiuser MIMO in the downlink of wireless systems

A source channel encoder, source channel decoder and methods for implementing such devices are disclosed herein. The source channel encoder includes a linear transform encoder configured to generate a plurality of source components. A successive refinement quantizer is configured to generate a plurality of bit planes based on the source components. A systematic linear encoder configured to map the bit planes into channel-encoded symbols. The linear transform encoder may be configured to apply a Discrete Cosine Transform (DCT) or a Discrete Wavelet Transform (DWT). The linear transform encoder may be configured for differential encoding.

System and method for lossy source-channel coding at the application layer

A system, a method and an apparatus are disclosed herein for receiver terminal driven joint encoder and decoder mode adaptation for SU-MIMO transmission. In one embodiment, the system comprises a transmitter that is able to be directed to transmit wireless signals over a multiple-input, multiple output (MIMO) system using any of a plurality of encoding modes; and a user terminal having a receiver comprising a decoding module which has a plurality of decoding modes, each of which can be used to decode communications from the transmitter received over a multiple-input, multiple output (MIMO) channel, wherein at least one encoding mode is operable with multiple of the decoding modes. The system also comprises a joint selection module that is operable to select for the MIMO transmission the decoding mode from the plurality of decoding modes and an encoding mode from the plurality of encoding modes to be used by the transmitter on the channel, the selection being based on receiver-dependent criteria corresponding to the decoding mode associated with the encoding mode and channel information, receiver hardware and state, and application-specific constraints. The joint selection module is operable to send information to identify the encoding mode to the transmitter using a feedback channel.

Receiver terminal driven joint encoder and decoder mode adaptation for SU-MIMO systems

Time and phase synchronization may enable distributed multiuser multiple-input multiple-output (MIMO) architectures and techniques, such as supported by the IEEE 802.11n standard, where several access points are connected to a central server and operate as a large distributed multi-antenna access point. The phase of all access points can be locked using a common reference (e.g., a synchronization tone) broadcasted over the air in conjunction with a predictive filter (e.g., a Kalman filter) which closely tracks the phase drift for each subcarrier channel.

Airsync: enabling distributed multiuser MIMO with full multiplexing gain

A method and apparatus is disclosed herein for varying transmit power patterns in a multi-cell wireless transmission environment. In one embodiment, the method comprises varying transmit power coordination patterns for base stations in the wireless communication system to jointly vary base station power over a set of virtual channels over base stations within a cluster and across clusters of base stations; and jointly transmitting by groups of the base stations to one or more user terminals in their respective clusters based on the transmit power coordination patterns.

Method for varying transmit power patterns in a multi-cell environment

A method and apparatus is disclosed herein for scheduling and transmission for downlink multi-user MIMO (MU-MIMO). In one embodiment, the method comprises allocating a subset of time-frequency resources in the time-frequency plane to each distinct bin class, where each bin class comprises one or more bins of user terminals across the topology, and wherein user terminals in the one or more bins of each bin class are served across the topology by the subset of time-frequency resources. The method also comprises performing joint downlink MU-MIMO transmission using a plurality of bin class-dependent wireless transmission architectures at the plurality of base stations, where one or more bin classes is associated with one of the plurality of bin class-dependent architectures, and where each of the plurality of bin class-dependent architectures use different combinations of scheduling training and MU-MIMO transmission across the topology.

Method and apparatus for the joint design and operation of scheduling and transmission for downlink multi-user MIMO with reciprocity-based training

A method and apparatus is disclosed herein for verifying coordination patterns to improve performance in a multi-cell or multi-antenna environment. In one embodiment, the method comprises storing a set of predefined and different coordination patterns, where each coordination pattern specifies entities in the plurality of cells that are to coordinated together in their transmissions in each cluster of cells on different transmission resources defined for example in one or both time and frequency; and varying entities that coordinate with each other in their transmissions in each cluster of cells over transmission resources according to the predefined coordination patterns.

Growing community of inventors

South Pasadena, CA, United States of America

Giuseppe Caire