Cisco CISCO1005-CH Deployment Guide - Page 21

Deployment Determining Deployment Requirements Protocol Requirements One of the critical decisions in deploying a wireless LAN is deciding which protocols and bands it will support. The following table shows the options and the advantages/disadvantages of each. Table 1 Protocol Requirements Protocol/Band 802.11a/b/g 802.11 b/g only 802.11a only Advantage Disadvantage Highest capacity option (three 802.11b/g channels and thirteen 802.11a channels) Small increase in the Cisco 1000 Series IEEE 802.11a/b/g lightweight access point cost Highest performance option (54 Mbps for both 802.11g and 802.11a) Rogue access point detection for both 2.4 GHz 802.11b/g and 5.0 GHz 802.11a bands Supports legacy clients 802.11g performance is limited in the Lowest cost Cisco 1000 Series IEEE presence of 802.11b users 802.11a/b/g lightweight access point Limited capacity Does not support 802.11a clients High performance Does not support 802.11b/g clients High Capacity Coverage Area Requirements Customers typically want seamless full RF coverage or partial RF coverage in conference rooms, lunch rooms, etc. Coverage holes are areas where clients cannot receive a signal from the wireless network. When deploying wireless networks, there is a trade-off between the cost of the initial network deployment and the percentage of coverage hole areas. A reasonable coverage hole criterion for launch is between 2 and 10 percent. This means that between two and ten test locations out of 100 random test locations may receive marginal service. After launch, the Cisco WLAN Solution Radio Resource Management (RRM) will identify these coverage areas and report them to the IT manager, allowing the IT manager to fill holes based on user demand. 78-17279-01 Deployment Guide: Cisco Aironet 1000 Series Lightweight Access Points 3