Cell Edge Specification Notation (CESN)
When it comes to designing WLAN RF environments, everyone seems to have their favourite cell edge signal level that they like to shoot for. Common figures include -67dBm for voice grade WLANs, maybe -60dBm for higher 802.11ac speeds and perhaps -72dBm for general data traffic coverage. Each vendor and wireless consultant seems to have their own preferred cell edge design target that will vary with WLAN requirements. However, these figures are meaningless without some type of explanation or context. If you rely solely on these types of figures, you are very likely designing incorrectly.... Background Around 18 months ago, I was involved in a project that required the deployment of a new wireless LAN network at many sites around the globe. The project required that all sites would be subject to the same standard of RF parameters to provide a consistent design approach at all sites. A team was sent to the first site to perform an “AP on a stick” survey using an AP of the same mo...