A Performance Study of Zig Bee Broadcasts in Coexistence with Wi-Fi

Survey and study of LR-WPAN link quality under Wi-Fi interference

“…That means the receiving WPAN device may have better chance to successfully decode the incoming packet even if some part of it has been affected by on-going Wi-Fi signals. In short, the higher Tx power, the larger covering area and better SINR, and therefore more chance for WPAN devices to survive in WiFi interference [8], [7]. Alternatively, closer distances between WPAN devices have the same effect.…”

“…On the other hand, when the Tx power of IEEE 802.15.4 packets increased, the link quality were improved due to the better SINR and their mitigation effect on the Wi-Fi sender. The detailed discussion of high-power IEEE 802.15.4 packets on Wi-Fi can be found at [7], [8]. The survey and test results in Section II and III showed that a WPAN shall have an acceptable link quality at most of the operating time even when the channel is covered by a Wi-Fi network.…”

“…To benchmark the impact of external interference on WPAN message transmissions, we defined Clear Channel Rate (CCR) in [7]. In short, it is a function of how much unoccupied time gaps are available in the current operating channel.…”