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Ubee Interactive
Using the Wi-Fi Multimedia Option
Ubee DDW365 Advanced Wireless Gateway Subscriber User Guide
September 2015
77
9.5
Using the Wi-Fi Multimedia Option
Use the Wi-Fi Multimedia option to configure the quality of service (QoS) to ensure the
best service in your wireless networks.
Controls WLAN transmission priority on packets transmitted over the wireless network.
Wi-Fi Multi-Media Quality of Service (WMM QoS) is a part of the IEEE 802.11e QoS
enhancement to certified Wi-Fi wireless networks.
WMM QoS prioritizes wireless traffic according to the delivery requirements of the
individual user and applications. On wireless access points without WMM QoS, all
traffic streams are given the same access priority to the wireless network. If a new
traffic stream creates a data transmission demand that exceeds the current network
capacity, the new traffic stream reduces the throughput of the other traffic streams.
MAC Addresses
Defines the MAC addresses. Note: You may cut and paste
MAC addresses from the connected clients list at the bottom
of the screen.
Apply
Saves changes when clicked.
Connected Clients
Lists wireless clients currently connected listed by MAC
address.
MAC Address
– Displays the MAC addresses entered in
the MAC Addresses field (see above).
Age(s)
– Displays the duration since the wireless client’s
polled values were sent to the device. The values include
all information shown on this screen. The lower the
number, the more current its data.
RSSI(dBm)
– Displays the received signal strength from
the device to the wireless cable modem. This value is
commonly used to assist in troubleshooting wireless
performance issues. A signal strength between 0dBm
and -65dBm is considered optimal. Levels of -66dBm and
lower (for example, -70, -80, etc.) have a downward
impact on wireless data throughput. Refer to
Understanding Received Signal Strength on page 82
for
more information.
IP Address
– Displays the IP address assigned to this
wireless client.
Host Name
– Displays the host name of the wireless
client.
Mode
– Indicates the applicable 802.11a/b/g/n standard
used by the connected client device.
Speed (kbps)
– Displays the maximum theoretical link
speed negotiated
between the wireless gateway and the
client, not including the overhead associated with
encryption, and so on.
For example, actual speeds with
WEP encryption enabled a
re typically less than half of the
negotiated link speed. TKIP encryption can also affect
performance. AES is the most efficient and secure with
the highest throughput possible. You can disable WMM if
throughput on some client adapters is adversely affected.
Label
Description
Page 82 / 106
Ubee Interactive
Using the Wi-Fi Multimedia Option
Ubee DDW365 Advanced Wireless Gateway Subscriber User Guide
September 2015
78
WMM QoS capability allows you to assign access categories (ACs) to various packet
streams. The assigned AC of a packet stream depends on the packet’s priority, such
as a priority assigned by an application (also referred to as a user priority (UP). An AC
may include a common set of enhanced distributed channel access (EDCA)
parameters used by QoS to contend for a channel to transmit packets with certain
priorities.
Different ACs can be associated with different power saving parameters. For example,
one power saving parameter might be the delivery mechanism used by an access
point (AP) to deliver packets to a station (STA) that is operating in a reduced power
mode.
WMM transmit opportunity (TXOP) is assigned to each access point. The bounded
time interval during which a station can send as many frames as possible as long as
the transmission time does not extend past the maximum duration of the TXOP. If a
frame is too large to be transmitted in a single TXOP, it should be fragmented into
smaller frames. Using TXOP reduces the problem of low rate stations gaining too
much channel time in the legacy 802.11 DCF MAC. A TXOP time interval of 0 means
it is limited to a single MAC service data unit (MSDU) or MAC management protocol
data unit (MMPDU).
Note
WMM may need to be disabled to avoid throughput impacts to other wireless devices.
Steps
To configure the multimedia wireless option:
1.
Click
Wireless
from the main menu.
2. Click
WMM
(Wi-Fi Multimedia
)
from the left side menu. Field descriptions are listed
below the screen example.
Page 83 / 106
Ubee Interactive
Using the Wi-Fi Multimedia Option
Ubee DDW365 Advanced Wireless Gateway Subscriber User Guide
September 2015
79
Label
Description
WMM Support
Enables (On) or disables (Off) WMM support.
No-Acknowledgement
Enables (On) or disables (Off) acknowledging data frames. In
QoS mode, frames to send can have two values: QosAck and
QosNoAck. Frames with QosNoAck are not acknowledged,
avoiding the retransmission of highly time-critical data.
Power Save Support
Enables (On) or disables (Off) power savings. WMM Power
Save increases the efficiency and flexibility of data transmission.
The wireless client device can “doze” between packets to save
power, while the wireless access point buffers downlink frames.
The application chooses the time to wake up and receive data
packets to maximize power conservation without sacrificing
quality of service.
Apply
Saves changes to the WMM settings above.
Page 84 / 106
Ubee Interactive
Using the Bridging Option
Ubee DDW365 Advanced Wireless Gateway Subscriber User Guide
September 2015
80
9.6
Using the Bridging Option
Use the
Bridging
option to configure the DDW365 to act as a wireless network bridge
and establish wireless links with other wireless access points. To establish a bridge, you
need to know the MAC address of the peer device, that must be in wireless bridging mode
as well. The DDW365 can establish up to four wireless links with other wireless access
points. When wireless devices are in wireless bridging mode, they form a wireless
distribution system that allows computers in one LAN to connect to the computers in the
other LAN.
EDCA AP Parameters
Allows you to prioritize wireless network traffic. Enhanced
Distributed Channel Access – Access Point (EDCA-AP)
provides four access categories (ACs):
AC_BE
– Best Effort, medium throughput and delay. Most
traditional IP data is sent to this queue.
AC_BK
– Background, high throughput. Bulk data that
requires maximum throughput and is not time-sensitive is
sent to this queue (for example, FTP data).
AC_VI
– Video
AC_VO
– Voice
CWmin
CWmax
AIFSN
TXOP (b) Limit (usec)
TXOP (a/g) Limit (usec)
Discard Oldest First
Sets the time for the following fields:
CWmin
– Contention window minimum
CWmax
– Contention window maximum
AIFS
– Arbitration inter-frame space
TXOP
– Transmit opportunity
Discard Oldest First
– Removes oldest frame when set to
On.
EDCA STA Parameters
Allows you to prioritize wireless network traffic for receiving
terminals. Access categories are:
AC_BE
– Best Effort, medium throughput and delay. Most
traditional IP data is sent to this queue.
AC_BK
– Background, high throughput. Bulk data that
requires maximum throughput and is not time-sensitive is
sent to this queue (for example, FTP data).
AC_VI
– Video
AC_VO
– Voice
WMM TXOP Parameters
Allows you to prioritize wireless network traffic for wireless
multimedia transmit opportunities. Access categories are:
AC_BE
– Best Effort, medium throughput and delay. Most
traditional IP data is sent to this queue.
AC_BK
– Background, high throughput. Bulk data that
requires maximum throughput and is not time-sensitive is
sent to this queue (for example, FTP data).
AC_VI
– Video
AC_VO
– Voice
Short Retry Limit
Short Fallbk Limit
Long Retry Limit
Long Fallbk Limit
Max Rate in 500kbps
Defines how many times the MAC retries to send different types
of packets. If the number of retries reach their limit, the frame is
discarded.
Apply
Saves all changes.
Page 85 / 106
Ubee Interactive
Deploying and Troubleshooting the Wireless Network
Ubee DDW365 Advanced Wireless Gateway Subscriber User Guide
September 2015
81
Caution
Avoid bridge loops when you enable bridging devices. Bridge loops cause broadcast traffic to
circle the network endlessly. This can degrade throughput and disrupt communications.
Steps
To configure the modem as a bridge:
1.
Click
Wireless
from the main menu.
2. Click
Bridging
from the left side menu. Field descriptions are listed below the screen
example.
9.7
Deploying and Troubleshooting the Wireless Network
Use the information in this section to help you understand, deploy, and troubleshoot your
wireless environments:
Understanding Received Signal Strength on page 82
Estimating Wireless Cable Modem to Wireless Client Distances on page 82
Understanding the 2.4GHz Band on page 84
Selecting a Wireless Channel on page 85
Label
Description
Wireless Bridging
Enables or disables bridging.
Remote Bridges
Defines the MAC addresses of other wireless access points that
you want to establish a bridge to and from. These access points
must also have bridging enabled.
Apply
Saves all changes.

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