Wireless home network supporting concurrent links to legacy devices
US9331883B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2014 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Sep 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03426
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A wireless access point (WAP) including: a station grouping module, a transmit selector, a spatial mapper, an output injector, and an input injector. The station grouping module selects a group of station nodes for concurrent MIMO communications. The transmit selector determines whether all station nodes in the group support a multi-user (MU) protocol. The spatial mapper precodes concurrent transmissions to the group using a precode matrix “Q” which spatially separates the concurrent MIMO transmissions to each station node in the group. The output injector injects preambles for synchronizing timing of the MIMO transmissions at the output of the spatial mapper, responsive to an affirmative determination by the transmit selector. The input injector injects preambles before precoding in the spatial mapper, responsive to a negative determination by the transmit selector; whereby transmission preambles are precoded when at least one station node in the group doesn't support the MU protocol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.