19216811.liveVersion 2.0, February 2012. Copyright
2012 Hitron Technologies
101
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
101
HITRON CGN2 USER’S GUIDE
Reverse Direction
Grant (RDG)
Use this field to configure Reverse Direction Grant in
IEEE 802.11n transmissions.
Each data transfer requires that the wireless station
initiating the transfer acquires permission from the
access point to perform the transfer. This is known as a
transmission opportunity, or TXOP. Each TXOP is time-
limited; the initiating station may transmit for only a
certain length of time, and then must cease.
Normally, if the receiving station wishes to return data to
the initiating station, it must also acquire its own TXOP.
However, when you enable Reverse Direction Grants, a
wireless station that has already obtained a TXOP may
issue a Reverse Direction Grant to the receiving station.
This allows the receiving station to transmit data back to
the initiating station for the remaining time specified in
the original TXOP. It does not need to acquire its own
TXOP.
Select
Disable
to disallow Reverse Direction Grants.
Select
Enable
to allow Reverse Direction Grants.
Extension Channel
This field displays the secondary wireless radio channel
that the CGN2 uses for channel bonding (combining two
channels for faster data transfer) in IEEE 802.11n
transmissions.
NOTE:
At the time of writing, you cannot select the
Extension channel
. It is selected automatically
by the CGN2.
Aggregation MSDU
(A-MSDU)
Use this field to control whether the CGN2 supports
Aggregation MSDUs (A-MSDUs) in IEEE 802.11n
transmissions.
Each A-MSDU consists of multiple MSDUs, added
together (aggregated) to create one large packet. This
reduces the overhead associated with transmission, but
can result in a reduced data rate if your network suffers
from a high error rate since each lost A-MSDU will
require retransmission.
Select
Disable
to not use A-MSDUs.
Select
Enable
to use A-MSDUs.
Table 29:
The Wireless > Advanced Screen (continued)