Multi-resolution beam training in MMW WLAN systems

US10707934B2 · kind B2 · utility

Assignee

• InterDigital Patent Holdings, Inc. · FR

Inventors

• Oghenekome Oteri · San Diego, US
• Alphan Sahin · Tampa, US
• Hanqing Lou · Syosset, US
• Xiaofei Wang · Cedar Grove, US
• Cen Lin

Key dates

• Filing date: Mar 10, 2017
• Grant date: Jul 7, 2020
• Expiry date: Mar 10, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B7/0619
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Systems, methods, and instrumentalities are disclosed for multi-resolution training, for example, in millimeter wave (mmW) WLAN systems. In a Multi-Resolution Beam Refinement Protocol (MR-BRP), an access point (AP)/PBSS control point (PCP) and a station (STA) may perform multi-resolution beamforming training, for example, by changing a sub-beam resolution or by maintaining sub-beam resolution while changing a resolution of the beamforming training between levels or stages of training. Sub-beam resolution may be changed, for example, by assigning different angular spreads to or by downselecting a number of antenna elements while keeping inter-element spacing constant between levels of training. Resolution of beamforming training may be changed, for example, by downsampling sub-beams or by downsampling antenna elements while adjusting inter-element spacing. Beamforming training (e.g. refinement) levels may refine beams by changing a resolution of antenna weight vectors (AWVs). An AP/PCP and STA may search through a sector multiple times with sub-beams of different resolution to identify a correct pair of sub-beams at a desired resolution. MR-BRP may be used for single or multiple bea…