How Can Coexistence of FH and DS Networks Be Ensured?

Article ID: 89930130

Question

How Can Coexistence of FH and DS Networks Be Ensured?

Answer

Determine the amount of traffic that will be involved with coexisting networks.  Too much traffic will result in slow response time due to collisions causing re-transmission of data.
This should not be considered a permanent solution since there is no way to avoid collisions.
Do not assume that the units can be placed next to each other.  There should be a ten-foot distance between the older and newer access points.
The appropriate locations for FH and DS access points don’t necessarily match.  A site survey should be conducted prior to deploying any new network to get maximum coverage.
Your volume of traffic may not allow the two different networks to coexist.

Frequency Hopping (FH) and Direct Sequence (DS) networks use the same bandwidth at frequency 2.4 Ghz. It is possible for a FH and DS network to coexist, but a number of issues must be considered.  The FH and DS will not work with the same mobile units.  All pre-existing FH equipment runs under the 802.11 protocol, which is not compatible with the DS 802.11b protocol.  Therefore, all FH mobile units will only work with FH access points.  Also, remember that any new DS mobile units will run only with DS access points.  There will be collisions of some of the data being transferred, which will result in a re-transmission of the data.  The smaller the size and amount of traffic the better.  With that in mind, you can have coexisting networks.