IEEE 802.11b is a newly ratified standard for 11 Mbps High Rate Wireless LANs (WLAN).
It operates at 2.4 GHz radio frequency band using Direct Sequence Spread Spectrum (DSSS)
and delivers up to 11 Mbps wireless performance comparable to wired Ethernet.
The benefits of using the IEEE 802.11b Wireless LAN :
Freedom: no need for wires, free to move.
Fast: 11 Mbps, "wired-like" performance.
Scalability: easy to expand.
Flexibility: instant network, conference anywhere.
Security: wired equivalent security.
Low Cost of Ownership: no wires, lower cost.
IEEE 802.11b is a new WLAN standard ratified from the original IEEE 802.11 specifications.
The following table lists the similarity and difference of these two standards.
IEEE 802.11b WLAN products work with HomeRF, IrDA, or Bluetooth™ products since
they are all using the same 2.4 GHz frequency band. However , Even though most of the wireless
communications solutions are currently using the same
2.4GHz frequency band, different signaling mechanisms, such as IEEE 802.11b Direct
Sequence Spread Spectrum (DSSS) or Bluetooth Frequency Hopping Spread Spectrum
(FHSS), would not interoperate with one another.
The IEEE802.11b WLAN solutions work with the existing IEEE 802.3 wired Ethernet
Network because The IEEE 802.11b WLAN Access Point also conforms with IEEE 802.3
Ethernet standard. You may have the WLAN along with your existing IEEE802.3 wired Ethernet
network by adding an access point as a bridge between these two networks.
The IEEE 802.11b DSSS products interoperate with other vendor's IEEE 802.11 and
IEEE802.11b DSSS products In order to interoperate with the other IEEE 802.11b and IEEE
802.11 DSSS products, the WLAN solutions providers need to compliant with Wi-Fi™. The entire
AmbiCom WLAN product families are Wi-Fi compliant, and they work seamlessly with other
To setup an IEEE802.11b Wireless network, you need to have at least two WLAN products.
You can have a simple peer-to-peer (Ad Hoc) network, or add an AP to connect with your
existing wired network (Infrastructure).
Ad Hoc, Refers to two or more computers, directly communicate with each other
without the need of Access Point (AP) or other equipment. Infrastructure, refers to group of
computers, communicate with each other, with the need of AP as the center of network, and
as a bridge to the wired network.
The current Wave2Net WLAN product families include PC Card, PCI adapter, and Access
Point satisfying needs from all users with either notebook PC, handheld PC, or desktop PC.
AP is a wireless hub, functions as a bridge between your existing wired network and your
wireless network (see Figure 1).
AP supports roaming capability, allowing user to roaming across different
access point while stay connected to the network (see Figure 2).
AP performs as an extension point, extending the communication distance of the original
WLAN(see Figure 3).
Figure 1. AP as a bridge