Radio Notification with Connection Event Length Extension

This section clarifies the functionality of the Radio Notification signal when Connection Event Length Extension is enabled in the SoftDevice.

When Connection Event Length Extension is enabled, connection events may be extended beyond their initial tradio to accommodate the exchange of a higher number of packet pairs. This allows more idle time to be used by the radio and will consequently affect the radio notifications.

In peripheral links, the SoftDevice will impose a limit on how long the Radio Event (tradio) may be extended, thereby restricting the maximum number of packets exchanged to accommodate the selected tndist. The following figure shows an example where the Radio Notification tndist is limiting the extension of the first Radio Event.

Figure 1. Peripheral connection event length extension limited by Radio Notification
Peripheral connection event length extension limited by Radio Notification