Motorola Corporation

Motorola Mobility LLC

Nokia Solutions and Networks Oy

Nokia Technologies Oy

Nokia Siemens Networks Oy

Alan P Rottinghaus

Yuda Yehuda Luz

Daniel Morris Lurey

Danny T Pinckley

Kevin M Laird

Xiaoyong Yu

Paul Fielding Smith

John M Smith

Robert C Elder

Donald E Bailey

David Baietto

Tony Kobrinetz

Shelia Marie Rader

Frederick W Vook

Shirish Nagaraj

Roy Yang

David T Chen

Sheila M Rader

Thomas J Kovarik

Phil Fleming

Rapeepat Ratasuk

Timothy A Thomas

Mark Conrad Cudak

Timothy J Wilson

Amitabha Ghosh

Jian Jun Wu

Gerald J Gutowski

William K Doss

Michael N Kloos

Anthony Kobrinetz

Chandrasekar Sankaran

Jeff L Pfeil

Javier J Tapia

Yehuda Luz

Stephen W Henderson

Ke-Kang Chin

Xiaonyong Yu

Kevin Michael Laird

Danny Thomas Pinckley

Sheila Marie Rader

David Chen

The exemplary embodiments of the invention provide at least a method and an apparatus to determine a beacon signal for a network node, where the network node is configured to connect with a cluster of access points in a wireless communication network, and where the beacon signal identifies the cluster; and send the beacon signal towards the wireless communication network. Further, the exemplary embodiments of the invention provide at least a method and an apparatus to determine a dominant access point of a cluster of access points based on signaling from at least one access point associated with the cluster of access points; and in response to the determining, direct communications towards the dominant access point of the cluster of access points.

Millimeter wave access architecture with cluster of access points

An exemplary method includes determining, at a centralized processing apparatus of a wireless network, a first subset of downlink user plane data corresponding to one or more wireless user equipments at least by calculating input data required at each of one or more L1 PHY processing stages of a remote processing apparatus, wherein the first subset includes bits required by a remote processing apparatus to select a first symbol for transmission to the one or more user equipments at a first time slot; and streaming, via a fronthaul interface, the bits of the first subset followed by bits of one or more further subset of downlink user plane data, wherein the bits of the further subset of user plane data includes only the bits required to select by the remote processing apparatus a next symbol for transmission to the one or more of the wireless user equipments at a next time slot immediately following the first time slot.

5G cloud RAN method for symbol by symbol bit streaming

Described are techniques for limiting bandwidth requirements for user equipment UE data sent on a front haul link between a remote radio head RRH and a baseband unit BBU. For a given UE a subset of a plurality of beams is selected based on received energies of the plurality of beams, and for the given UE only data from the selected subset of beams transmitting on a front haul link. Multiple techniques are detailed for how the subset is selected, including (when UE allocation information is available) averaged received beam energy, total received beam energy, maximum received beam energy and also (when UE allocation information is not available). For further bandwidth reduction a special data compression technique uses the received energies of each beam to select a minimum gain offset value after dividing the data into I and Q components.

Bandwidth reduction with beamforming and data compression

This specification describes a method comprising generating a first packet based on user plane data relating to a single user which is output by a first L1 PHY processing stage, the first packet including a proper subset of the user plane data which is to be transmitted to the user equipment during a first time-slot symbol; passing the first packet to a second L1 PHY processing stage across a split fronthaul interface in a first time period having a duration corresponding to a duration of transmission of the first time-slot symbol; and passing one or more subsequent packets including the remainder of the user plane data across the split fronthaul interface in one or more successive time periods which are immediately subsequent to the first time period.

Transportation of user plane data across a split fronthaul interface

A method includes selecting a subset k of N accessible antennas to use to process a transmission received at the N antennas and sent by a user equipment, and processing the transmission from the user equipment at least by using baseband information from the k antennas. An apparatus includes one or more processors and one or more memories including computer program code. The one or more memories and the computer program code are configured to, with the one or more processors, cause the apparatus to perform at least the following: selecting a subset k of N accessible antennas to use to process a transmission received at the N antennas and sent by a user equipment; and processing the transmission from the user equipment at least by using baseband information from the k antennas. Additional apparatus, computer programs, and computer program products are disclosed.

Uplink grouping and aperture apparatus

A method is disclosed that includes accessing baseband information for a number, N (N&#x3e;1), of antennas accessible by a number of baseband units, where the baseband information correspond to a transmission by a user equipment and is received at the N antennas. The method includes determining values for one or more metrics for the baseband information for the N antennas. The method includes selecting, based on the determined values, a subset k of the N antennas and corresponding baseband information to use to determine output data for the transmission by the user equipment. The method includes determining the output data for the user equipment using the baseband information from the k antennas. Apparatus and computer program products are also disclosed.

Cell clustering and aperture selection

An OFDMA communication system is provided that schedules partial usage of subchannels (PUSC) major groups by assigning a beam matrix of a plurality of beam matrices to each major group of multiple PUSC major groups, receiving an uplink signal from each user equipment of multiple users equipment, which uplink signal provides an indication of a channel response associated with the user equipment, determining, for each user equipment of the multiple users equipment and based on the indication of channel quality received from the user equipment, a beam matrix and major group to which to assign the user equipment, and based on the determination of a beam matrix and major group to which to assign each user equipment of the multiple users equipment, assigning two or more users equipment of the multiple users equipment to a same beam matrix and major group during a same time slot.

Method and apparatus for major group scheduling in a fixed beam communication system

Disclosed are a wireless communication system, method, and site controller for mitigating at least one of a transmission timing synchronization loss and a receiving timing synchronization loss at a base station. The method includes determining, at a first base station, a loss of a timing reference the timing reference is used by the first base station for timing synchronization of at least one of a transmission and reception of wireless data. The timing synchronization is predefined and common between at least the first base station and a second base station. The method further includes adjusting, in response to the determining, at least one of a transmit guard time and a receive guard time by at least one symbol time.

Mitigating synchronization loss

A method, a system and a receiver device provide timing and frequency correction in a spatial division multiple access (SDMA) system. A timing and frequency correction (TFC) logic/utility obtains a timing error estimate by using pilot symbols on a slot of six tiles. The TFC logic estimates the timing error based on pilot phase differences between unique pairs of tiles when the frequency separation of the tiles is less than a threshold value. When none of the unique pairs of tiles satisfies the threshold value, the TFC logic estimates timing error based on an exhaustive search for each candidate phase error value. The TFC logic performs timing error correction via a timing error estimate based on pilots from the symbols received on each antenna. The TFC logic performs inexplicit frequency error correction according to phase differences based on relative symbol indices.

Up-link SDMA receiver for WiMAX

A wireless communication system (), method, and site controller () schedule at least one of transmission and reception of wireless data by at least one wireless communication device. A distance is determined between at least one wireless communication device () and a base station () in a wireless communication cell (). At least one of a downlink subframe () and an uplink subframe () of a time division duplexing frame () is segmented into a plurality of segments. The at least one wireless communication device () is scheduled into at least one of the plurality of segments of the downlink subframe () and the uplink subframe () based on the distance determined between the at least one wireless communication device () and the base station ().

Intelligent scheduling in a time division duplexing system to mitigate near/far interference scenarios

A communication device is provided that is capable of operating in an OFDM or communication system and that provides for cancellation of in-band spurs. The communication device identifies a bin of multiple bins associated with an output of an inverse transformer and comprising a spur and estimates one or more spur phase parameters and a spur amplitude in association with the identified bin. In one embodiment of the present invention, the one or more spur phase parameters includes a spur initial phase and a spur change rate. When the communication device receives a signal from another communication device, the communication device transforms the received signal to produce a multiple parallel output signals that are each associated with a bin of the multiple bins and cancels a spur in an output signal associated with the identified bin based on the estimated one or more spur phase parameters and spur amplitude.

Method and apparatus for spur cancellation in an orthogonal frequency division multiplexing communication system

A method for selecting at least one operating parameter of a communication system (). The method can include determining a receive signal strength indicator (RSSI) for a communication signal (). An intermediate value (D) for the communication signal can be determined based on, at least in part, a received value (r) of at least one known datum, a predetermined value (p) of the known datum and a channel estimate ({tilde over (h)}). Further, a carrier to interference and noise ratio (CINR) can be estimated based on, at least in part, the RSSI and the intermediate value. The operating parameter can be selected based on, at least in part, the estimated CINR.

Estimation of CINR and RSSI in a wireless communication system

Arrangements relating to an Orthogonal Frequency Division Multiplexing (OFDM) receiver () can include performing at least one Low-Density Parity Check (LDPC) decoding attempt on a received signal () and evaluating at least one parity check for each LDPC decoding attempt (). Failed LDPC decoding attempts can be counted according to the evaluated parity checks (). The signal can be selectively processed through at least one joint demodulation-decoding loop according to the counting of failed LDPC decoding attempts ().

Orthogonal frequency division multiplexing (OFDM) system receiver using low-density parity-check (LDPC) codes

An apparatus (,) and method dynamically allocates radio frequency receive path resources as required by a programmable location engine (,). The programmable location engine (,) employs cascaded time of arrival and direction of arrival algorithms to determine per remote unit location data. The apparatus (,) employs a phased array antenna (,) and a programmable receiver switching apparatus (,). A plurality of radio frequency receivers (,) receive a plurality of different carriers, such as CDMA carriers, on each of a different phased array antenna element (,). An RF switching matrix (,) and mobile location shared resource controller (,) dynamically switch the plurality of radio frequency receivers (,) to not only receive the different carriers on each of the different phased antenna radio elements to determine time of arrival information, but alternately receive a same carrier signal over all or a portion of the phased array antenna element to determine direction of arrival information.

Method and apparatus for determining remote unit location using phased array antenna elements

Multiple access digital transmitter and receiver

Growing community of inventors

Barrington, IL, United States of America

Alan P Rottinghaus