Wireless Networking within a building is achieved using one of two main types of wireless LAN
- Solutions using Frequency Hopping Spread Spectrum radio's. IEEE 802.11
- Solutions using Direct Sequence Spread Spectrum radio's. IEEE 802.11b
|
FHSS |
DSSS |
Data rate - through the air |
Up to 3Mbps |
Up to 11Mbps |
Net data throughput |
Up to 2.4Mbps |
Up to 5.5Mbps |
Number of co-located cells / systems |
Maximum 26 in any one hopping set. There are 3 sets of 26 |
Maximum 3. Channels 1,7 & 13 |
Ideal for indoor applications |
Yes |
Yes |
Ideal for outdoor applications |
Yes |
No |
FHSS is lower data rate than DSSS systems but can be installed into virtually any location without fear of interference interrupting it's operation.
DSSS delivers higher bandwidth than FHSS systems but cannot always be installed - due to all three available channels being used in the area. If you are sharing a building where other people are also using DSSS, you may encounter problems.
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