Comparison of IEEE 802.11g optional standard elements in WLAN hotspot scenario

It is well known that IEEE 802.11b is the most widespread WLAN standard of today. Therefore it has been chosen for a number of deployments in the public areas with huge bandwidth demands, so called hotspots. As IEEE 802.11b does have particular capacity limitations, IEEE 802.11 working group decided to make its improvement through work on more advanced IEEE 802.11g standard. Besides basic capacity gain, IEEE 802.11g must also provide full backward compatibility with IEEE 802.11b and basic forward compatibility with IEEE 802.11a standard. To comply with all those different requirements, draft of IEEE 802.11g standard includes two basic and two optional elements. The aim of this paper is to compare CCK-OFDM and PBCC-22/33 as optional transmission principles of IEEE 802.11g standard in the case of their application within existing WLAN hotspot networks.