Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guida Alla Progettazione

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Enterprise Mobility 4.1 Design Guide
OL-14435-01
Chapter 3      WLAN Radio Frequency Design Considerations
  Manually Fine-Tuning WLAN Coverage
Figure 3-13
Channel Assignment
It is also possible to implement a dual-band deployment scheme, as shown in 
. The top left 
portion of the diagram shows the 802.11b/g-only deployment, which uses the three nonoverlapping 
channels (channels 1, 6, and 11) to map out a pattern that has the least co-channel interference; that is, 
interference from an AP close by that is on the same channel, that is operating at sufficient power levels 
with its coverage pattern overlapping with that of another access point. It also shows an 802.11a 
deployment, which uses the eight nonoverlapping channels. The right side of the diagram illustrates how 
the channels would be mapped in a dual-band deployment.