Air Link Framerate Insurance is a new feature for the Meta Quest 2 headset which resolves issues that some users may experience when the headset’s Air Link does not work well with their home wireless network.
Air Link is a feature of Quest and Quest 2 released last year that allows your headset to connect to your Wi-Fi network, allowing you to play PC VR games wirelessly.
like the oculus developer blog notes (thanks load VR), the problem with the headset connected to your PC via Wi-Fi instead of a dedicated transmitter is that performance is often dependent on Wi-Fi signal strength. So if there is any interference, you will experience judder or frame drops which are not ideal when playing VR video games. In fact, this kind of crash can have disastrous consequences for users who are already prone to getting sick in VR.
Air Link Frame Insurance (AFI) is an experimental feature in Quest 2 to mitigate network interference by generating a synthetic frame whenever a frame is dropped due to network issues. It does this by looking at the movement between previous frames and essentially gives a rough estimate of what it should be like for your gameplay to remain as smooth as possible.
AFI is disabled by default, so you’ll have to launch the Oculus Debug Tool (ODT) and set the “Mobile ASW” dropdown to “Enabled – Framerate Insurance.
PC ASW (Asynchronous Spacewarp) is a similar feature that synthetically generates all other frames to reduce the workload on your PC.
Meta recommends leaving PC ASW on when you enable AFI to ensure maximum latency mitigation. If you are concerned about resource consumption, disable PC ASW whenever AFI is enabled. Meta also notes that the AFI doesn’t yet support 120Hz, so make sure you have your headset set to 90Hz or you’ll be hit by “significant artifacts of judder and latency”.
While AFI is not a panacea for bad Wi-Fi, it does serve for occasional signal problems. If the signal is consistently bad, the AFI will not have enough real frames to analyze and generate the false ones correctly. So, if your router is a little older and on its last legs, consider choosing a new game router for the cleanest Wi-Fi signal.