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Operating Mode
:
Supports two modes:
Mixed Mode:
In this mode packets are transmitted with a preamble
compatible with the legacy 802.11a/g – the legacy Short Training
Field(STF), the legacy Long Training Field(LTF) and the legacy signal
field are transmitted so they can be decoded by legacy 802.1a/g
devices. The rest of the packet has a new format. In Mixed Mode the
receiver shall be able to decode both the Mixed Mode packets and
legacy packets.
Green Mode:
It is an optional mode. In this mode high throughput
packets are transmitted without a legacy compatible part. In Green
Mode the receiver shall be able to decode both Green Field mode
packets, Mixed Mode packets and legacy format packets.
Channel Bandwidth:
Select the channel bandwidth from 20M or 20/40M
to improve the wireless performance.
Guard Interval:
In telecommunications, guard intervals are used to
ensure that distinct transmissions do not interfere with one another. These
transmissions may belong to different users (as in TDMA) or to the same
user (as in OFDM).The purpose of the guard interval is to introduce
immunity to propagation delays, echoes and reflections, to which digital
data is normally very sensitive.
MCS:
To 802.11n, due to the physical rate depends on the modulation,
coding rate, the number of spatial streams, a number of factors such as
whether the 40MHz binding. These factors will produce a lot of physical rate
to be select. For example based on Short GI, 40MHz binding techniques, in
four space flow, the physical rate can be up to 600Mbps (i.e. 4 x 150). So,
802.11n proposed the concept of MCS. MCS can be understood as complete
combination of the factors that affect the rates, each one labeled with
unique integers to identify. For the AP, MCS generally support the range of
0~15.
Reverse Direction Grant(RDG):
Default value is Enable. Systems and
methodologies are described that facilitate increased communication
channel bandwidth efficiency in association with scheduled time periods
that allocates channel access to particular stations. According to various
aspects, systems and methods are described that facilitate providing
and/or utilizing reverse direction grants in connection with scheduled
channel access. Such systems and/or method can mitigate an amount of
unused channel access time after a station completes data transmission
prior to an end of the allocated period.
Extension Channel:
To increase data throughput of wireless network, the
extension channel range is used in 11n mode.
Aggregation MSDU(A-MSDU):
Default value is Disable. Refers to the
number of MSDU aggregation through a certain way into a larger load. Here
MSDU can be considered as Ethernet packets. Typically, when the AP or
wireless client received packet (MSDU) from the protocol stack , it will
marked Ethernet header, which we call A-MSDU Subframe; and before sent
through the RF port, you need to change to 802.11 packet format.
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