Chapter 6; Topic 7

Coverage Hole Detection Criteria

The TPC algorithm can tune the transmit power to the level of each AP to optimize cell coverage and minimize co-channel interference with a correctly designed wireless network. The mounting of AP means that each of its internal radio antennae has a coverage cell centered around the AP’s location. Because the 5GHz has more to offer regarding non-overlapping channels used in high-density areas, wireless designs usually use the 5GHz and 2.4GHz cell boundaries to determine the AP placement. Furthermore, each signal is subject to frequency-dependent free space path loss. It implies that a 2.4GHz signal will reach its 67dBm boundary farther away from the AP than the 5GHz signal at the same power transmit level.

Coverage Hole Detection Criteria; Internet source

https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_RRM_White_Paper/chd.htmlAn administrator can effectively track and identify areas of the network that might require additional APs through close monitoring of the coverage hole algorithm. The coverage hole detection and Mitigation algorithm have four distinct roles; Coverage Hole Detection, validation of the Coverage Hole, and mitigation if Prudent. Initially, the coverage hole algorithm was established to evaluate coverage requirements as the network grows and changes. CDC is based on five seconds histogram of each client Received in RSSI values and maintained by the AP. The RSSI value sets the minimum receive threshold for voice and data separately. On the other hand, the minimum failed client count per AP determines the minimum number of clients in a coverage hole before mitigation can be considered.