Allocation of uplink resources in orthogonal frequency-division multiple access (OFDMA) wireless networks
US10091822B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2015 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | May 17, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of improved allocation of uplink resources in an OFDMA network is proposed. A wireless communications station (an AP) reserves both dedicated resource and contention resource for uplink OFDMA operation for a list of communications devices (STAs). The AP can switch between random access operation and non-random access operation without the need for any special protection mechanisms. In the event of an increase in uplink OFDMA frame collisions the AP can switch from random operation to non-random operation to reduce the number of collisions. In the event of a decrease in uplink OFDMA frame collisions the AP can switch from non-random operation to random operation to reduce required AP processing. The AP can also dynamically control a STA access probability to reduce the number of collisions by reducing the number of uplink OFDMA frames each STA transmits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.