GNU/Linux Oracle 9 Intel Wi-fi Driver Installation Guide
How to Install Intel Wireless Cards iwlwifi Driver on Oracle 9 GNU/Linux desktops – Step by step Tutorial.
Most noteworthy, the Intel Wireless iwlwifi Oracle Linux Driver is already bundled into the current Linux Kernels.
But in case of issue with the iwlwifi Driver then try to Check the Intel Supported Wireless Device List.

GNU/Linux Oracle Intel Wireless Driver Installation Guide
The Supported Intel Wireless Cards should work Out-of-Box on Oracle Linux.
But it may be just missing the Proprietary Firmware then see: How to Install Intel Wi-Fi Firmware.
Last, to get the latest Features and Fixes see: How to Update or better Upgrade Linux.