Search International and National Patent Collections

1. (WO2018158641) ADAPTIVE ALLOCATION OF TEMPORAL RESOURCES FOR MASSIVE MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) IN UNLICENSED FREQUENCY BANDS

Pub. No.:    WO/2018/158641    International Application No.:    PCT/IB2018/000292
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Wed Feb 28 00:59:59 CET 2018
IPC: H04W 16/14
H04W 74/08
H04B 17/345
H04B 7/0413
Applicants: ALCATEL LUCENT
Inventors: GERACI, Giovanni
GARCIA RODRIGUEZ, Adrian
GALATI GIORDANO, Lorenzo
LOPEZ-PEREZ, David
Title: ADAPTIVE ALLOCATION OF TEMPORAL RESOURCES FOR MASSIVE MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) IN UNLICENSED FREQUENCY BANDS
Abstract:
A node is configured for connection to a massive multiple-input, multiple-output (MIMO) array to provide spatially multiplexed channels in an unlicensed frequency band. The node includes a memory configured to store samples of non-spatially filtered signals received by the node during a first listen-before-talk (LBT) operation used to acquire the unlicensed frequency band. The node also includes a processor configured to determine, based on a number of previously stored samples, a duration of a silent time interval during which the node collects samples of non-spatially filtered signals and stores the samples in the memory. The node further includes a transceiver configured to perform a second LBT operation to acquire the unlicensed frequency band using a spatial filter determined based on the samples stored in the memory.