DG-WN3300N User Manual
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5-3 Glossary
IEEE 802.11n standard:
802.11n will work by utilizing multiple wireless antennas in
tandem to transmit and receive data. The associated term MIMO (Multiple Input, Multiple
Output) refers to the ability of 802.11n and similar technologies to coordinate multiple
simultaneous radio signals. MIMO increases both the range and throughput of a wireless
network. An additional technique employed by 802.11n involves increasing the channel
bandwidth.
IEEE 802.11g standard:
802.11g is the new IEEE standard for high-speed wireless LAN
communications that provides for up to 54 Mbps data rate in the 2.4 GHz band. 802.11g is
quickly becoming the next mainstream wireless LAN technology for the home, office and
public networks.
802.11g defines the use of the same OFDM modulation technique specified in IEEE 802.11a
for the 5 GHz frequency band and applies it in the same 2.4 GHz frequency band as IEEE
802.11b. The 802.11g standard requires backward compatibility with 802.11b.
The standard specifically calls for:
A.
A new physical layer for the 802.11 Medium Access Control (MAC) in the 2.4 GHz
frequency band, known as the extended rate PHY (ERP). The ERP adds OFDM as a
mandatory new coding scheme for 6, 12 and 24 Mbps (mandatory speeds), and 18,
36, 48 and 54 Mbps (optional speeds). The ERP includes the modulation schemes
found in 802.11b including CCK for 11 and 5.5 Mbps and Barker code modulation
for 2 and 1 Mbps.
B.
A protection mechanism called RTS/CTS that governs how 802.11g devices and
802.11b devices interoperate.
IEEE 802.11b standard:
The IEEE 802.11b Wireless LAN standard subcommittee, which
formulates the standard for the industry. The objective is to enable wireless LAN hardware
from different manufactures to communicate.
Ad-hoc:
An Ad-hoc integrated wireless LAN is a group of computers, each has a Wireless
LAN card, Connected as an independent wireless LAN. Ad hoc wireless LAN is applicable at
a departmental scale for a branch or SOHO operation.
Infrastructure:
An integrated wireless and wired LAN is called an infrastructure
configuration. Infrastructure is applicable to enterprise scale for wireless access to central
database, or wireless application for mobile workers.
