Downlink pilot assignment in massive MIMO
US11133907B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Sep 27, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0058
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network node (110) and a method for downlink pilot signal assignment and transmission, and for data transmission. The network node has a plurality of antenna elements distributed over an area. The network node determines a respective Channel State Information (CSI) and/or a respective channel hardening degree for a wireless device (120) based on an uplink pilot signal. Possibly, the network node determines a mobility condition for the wireless device. Based on one or more out of: the determined respective CSI, the determined respective channel hardening degree and the determined respective mobility condition, the network node obtains a pilot utility metric for the wireless device. Further, the network node assigns a downlink pilot signal to at least one wireless device having a pilot utility metric exceeding a predetermined threshold value. Furthermore, the network node transmits, to the at least one wireless device, data and possibly an assigned downlink pilot signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.