  Multi-connectivity offers diversity in terms of multiple interfaces through
which the data can be sent, thereby improving simultaneously the overall
reliability and latency. This makes interface diversity a natural candidate for
supporting Ultra-Reliable Low Latency Communications (URLLC). This work
investigates how the packet error statistics from different interfaces impacts
the overall reliability-latency characteristics. We use the simple
Gilbert-Elliott model for burst errors and estimate its parameters based on
experimental measurement traces from LTE and {Wi-Fi} packet transmissions
collected over several days. The results show that using interface diversity
configurations that include at least one {Wi-Fi} interface leads to, somewhat
surprisingly, since Wi-Fi is generally less reliable than LTE, superior results
in terms of packet success and error burst duration. Another interesting
finding is that {Wi-Fi}-based interface diversity configurations outperform
even ultra-reliable single links.
