Blackberry Corporation

Telefonaktiebolaget Lm Ericsson (publ)

Nortel Networks Corporation

Apple Inc.

Research in Motion Corporation

Ciena Corporation

Malikie Innovations Limited

Ciena Luxembourg S.a.r.l.

Chandra Sekhar Bontu

Zhijun Cai

Yi Song

Yi Yu

Mo-Han Fong

Shalini Suresh Periyalwar

Prabaharan Kanesalingam

Peter Anthony Barany

Hua Xu

Kim Bryon Roberts

Rose Qingyang Hu

Han Henry Sun

Yufei W Blankenship

Sophie Vrzic

Kuang Tsan Wu

Shiwei Gao

James Earl Womack

Yajun Zhu

Hong Ren

Shamim Akbar Rahman

Amin Mobasher

Patrick Lie Chin Cheong

Jagadish Ghimire

Andrew Mark Earnshaw

Xixian Chen

Yongkang Jia

Jianguo Long

Amr El-Keyi

Mercy George

Yonghai Gu

Devaki Chandramouli

David G Steer

Mark Pecen

Shavantha Kularatna

Tarik Tabet

Mark Andrew Hawryluck

Peter Hazy

Parsya Larijani

Youn Hyoung Heo

Siva Dharshan Muruganathan

Robert Novak

Dongsheng Yu

Mats Åhlander

Slobodan Jovanovic

Michael McKenna

Kevin Luo

Jianzhong Xu

Yufei Wu Blankenship

Zhijun S Cai

Mattias Frenne

Yan Xin

Jayshree Bharatia

Michael Eoin Buckley

Leo L Strawczynski

Maurice M O'Sullivan

Biswaroop Mukherjee

John Duncan McNicol

Alex Stephenne

Svante Bergman

Rene Waraputra Purnadi

Christian Skärby

James St Harley

Masoud Ebrahimi Tazeh Mahalleh

Karl D Mann

Jianfeng Weng

Shiguang Guo

Yongquan Qiang

Anders Johansson

Magnus Hurd

Alexander Langereis

Edward Mah

Edgar Velez

Girum Fantaye

David Nigel Freeman

William Edward Illidge

James Jianfeng Weng

John E Sitch

Alireza Mirzaee

Iris Bujold

Ping Wu

Michel Chauvin

Stephen P Leung

John Wolczanski

Marvin Blenn

N Gamini Senarath

Abdulbaset Atweri Zurgani

Ali Yaver

Bing Hu Z

Yu Song

Ebad Ahmed

Jefferson Tokurah

Maurice O'sullivan

Girum Alebachew Fantaye

Karl David Mann

Mark E Pecen

A method, system and apparatus for network slicing in cellular systems are disclosed. According to one aspect, a network node is provided. The network node includes processing circuitry configured to determine virtual resources at least in part by logically slicing a plurality of physical resources across a spatial domain, and assign the virtual resources to a first radio bearer associated with a first wireless device.

Network slicing in cellular systems

Embodiments of a method in a network node for resource allocation are disclosed. The method includes selecting a user set of wireless devices from available predefined user sets; estimating expected data rates for the wireless devices in the selected user set for a selected radio resource; computing a weighted sum of the expected rates of the wireless devices in the user set; and assigning a given the selected radio resource to the user set with the highest weighted sum. A criterion for dynamic resource allocation that can opportunistically exploit the channel variations towards achieving the optimal trade-off between the network capacity and wireless device-fairness is also disclosed.

Resource allocation in MU-MIMO OFDMA wireless systems

According to one aspect, a network node is provided. The network node includes processing circuitry configured to allocate resources for a reference signal signaling for a first wireless device, the allocated resources configured to separate, in a slot, at least one transmission layer of the first wireless device from at least one transmission layers of a second wireless device by at least one of scheduling the first wireless device and second wireless device different reference signal ports that are separated by using the same resource elements and different CDM codes, scheduling the first wireless device and second wireless device at least one shared reference signal port using the same resource elements and CDM code, and scheduling the first wireless device and second wireless device on different reference signal ports that are separated by FDM using different resource elements and the same CDM codes.

Configuration and resource allocation for downlink demodulation reference signals

Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.

Small cell demodulation reference signal and initial synchronization

A method and network node for single user multiple input multiple output (SU-MEMO) codebook-based precoder selection and for rank adaptation are provided. According to one aspect, a method includes, for each one of a plurality of rank hypotheses: selecting a precoder matrix based on an uplink transmit covariance matrix; and estimating a respective information carrying capacity, ICC, for the rank hypothesis based at least in part on the selected precoder matrix. The method further includes selecting an uplink SU-MIMO precoding matrix based at least in part on the estimated ICC for each rank hypothesis.

Uplink single user multiple input multiple output (SU-MIMO) precoding in wireless cellular systems

A network node is provided. The network node includes processing circuitry configured to estimate spatial transmission information, STI, for each of a plurality of wireless devices, and determine spatial separability among the plurality of wireless devices based at least in part on the estimated STI for each of the plurality of wireless devices. The processing circuitry is further configured to cause scheduling of the plurality of wireless devices on the same communication resources based at least in part on the determined spatial separability.

Multi-user coordinated transmission in cellular systems

A method, network node, wireless device and system are provided. In one or more embodiments, the network node is configured to communicate with a wireless device. The network node includes processing circuitry configured to: determine to transition the wireless device to one of a beamforming mode and non-beam forming mode, in response to the determination to transition the wireless device, modify at least one measurement report trigger associated with the wireless device, and transmit an indication of the modification of the at least one measurement report trigger to the wireless device.

Methods for modification of at least one measurement reporting trigger for biased measurements at the wireless device

A method and apparatus for beamspace processing in a radio access node are proposed. A channel estimate, which characterizes a radio channel between the antenna elements of an antenna array and a user equipment for a given time and a given frequency, is transformed using multiple distinct sets of spatial orthonormal basis functions to obtain transformed channel estimates. Each one of the distinct sets of spatial orthonormal basis functions defines a respective one of beamspace transformations. Based on measures of quality of beamspace transformation, a set of spatial orthonormal basis functions is selected from the sets of the spatial orthonormal basis functions to satisfy a beamspace reduction criteria for the radio channel. Data streams are encoded, based on a selected transformed channel estimate, into encoded data streams. The encoded data streams are then transmitted through the antenna elements of the antenna array.

Method and apparatus for beamspace processing based on multiple beamspace bases

A method and system for performing link adaptation are disclosed. According to one aspect, a method in a wireless communication system for performing link adaptation is provided. The method includes, when a first measure of channel quality is higher than a first predetermined amount, using a first outer loop adjustment process directed to determining link adaptation for a first data transmission transmitted to a wireless device. The method also includes, when the first measure of channel quality is lower than a second predetermined amount, using a second outer loop adjustment process different from the first outer loop adjustment process directed to determining link adaptation for a second data transmission transmitted to the wireless device.

Outer-loop adjustment for link adaptation

Systems and methods for estimating Signal-to-Noise Ratio (SNR) for Multi-User Multiple-Input and Multiple-Output (MU-MIMO) based on channel orthogonality. In some embodiments, a method performed by a radio access node includes obtaining a SU-MIMO signal quality measurement for at least a first user and an additional user; obtaining an indication of orthogonality between a channel of the first user and a channel of the additional user; and estimating a MU-MIMO signal quality measurement for the first user as if the first user and the additional user are paired with each other for a potential MU-MIMO transmission based on the SU-MIMO signal quality measurements and the indication of orthogonality. In this way, a computational complexity for the SINR estimation of MU-MIMO users can be greatly reduced. This may enable a large number of user pairing alternatives to be evaluated in practical wireless systems to achieve improved MU-MIMO performance.

Method to estimate SNR for MU-MIMO based on channel orthogonality

Systems and methods relating to adjusting uplink coverage in a cellular communications network are disclosed. In some embodiments, a method of operation of a network node to adjust uplink coverage for one or more cells in a cellular communications network comprises determining that there is a need to adjust uplink beam transformations for one or more cells of a plurality of cells in a cellular communications network. For each cell of the one or more cells, the uplink beam transformation for the cell is a transformation of received uplink signals for the cell from an antenna domain to a beam domain. The method further comprises, upon determining that there is a need to adjust the uplink beam transformations for the one or more cells, determining new uplink beam transformations for the one or more cells and applying the new uplink beam transformations for the one or more cells.

Systems and methods for uplink coverage adaptation

A wireless communication device receives an indication of timing alignment of a discontinuous reception (DRX) duration, determines a timing alignment for a reception/transmission (RX/TX) switching pattern of the wireless communication device based on the timing alignment of the DRX duration, and performs half-duplex (HD) communication with a radio access node according to the RX/TX switching pattern having the determined timing alignment.

Method and apparatus for half-duplex communication

Embodiments of a method in a base station for precoding a downlink transmission are disclosed. In some embodiments, the method comprises obtaining, for a time instant k, an estimate of a channel matrix for a wireless channel for a downlink from the base station to a wireless device and projecting the estimate of the channel matrix onto one or more sets of spatial orthonormal functions, thereby obtaining respective sets of coefficients. The method further comprises, for each set of spatial orthonormal functions, filtering the set of coefficients for the time instant k based on a filtering parameter that is specific to a downlink channel to be transmitted. The method further comprises generating beamforming weights using the filtered set of coefficients for at least one of the sets of spatial orthonormal functions, and precoding the downlink channel using the beamforming weights.

Beamforming in cellular systems using the same feedback information for different physical channels

Growing community of inventors

Nepean, Canada

Chandra Sekhar Bontu