Chapter 6 Wireless Settings Screen

 

 

 

 

 

Table 14 Wireless > Wireless Settings: MBSSID (continued)

 

LABEL

DESCRIPTION

 

 

 

 

 

 

Extension channel

You can use CTS to self or RTS-CTSprotection mechanism to reduce

 

 

protection mode

conflicts with other wireless networks or hidden wireless clients. The

 

 

 

throughput of RTS-CTSis much lower than CTS to self. Using this mode

 

 

 

may decrease your wireless performance.

 

 

 

 

 

 

A-MPDU aggregation

This field is available only when 802.11 b/g/n is selected as the Wireless

 

 

 

Mode. Select Enable to allow the grouping of several A-MSDUs (Aggregate

 

 

 

MAC Service Data Units) into one large A-MPDU (Aggregate MAC Protocol

 

 

 

Data Unit). This function allows faster data transfer rates.

 

 

 

 

 

 

Short GI

This field is available only when 802.11 b/g/n is selected as the Wireless

 

 

 

Mode. Select Enable to use Short GI (Guard Interval). The guard interval

 

 

 

is the gap introduced between data transmission from users in order to

 

 

 

reduce interference. Reducing the GI increases data transfer rates but also

 

 

 

increases interference. Increasing the GI reduces data transfer rates but

 

 

 

also reduces interference.

 

 

 

 

 

 

Rates Configuration

This section controls the data rates permitted for clients.

 

 

 

For each Rate, select an option from the Configuration list. The options

 

 

 

are:

 

 

 

• Basic (1~11 Mbps only): Clients can always connect to the access point

 

 

 

at this speed.

 

 

 

• Optional: Clients can connect to the access point at this speed, when

 

 

 

permitted to do so by the AP.

 

 

 

• Disable: Clients cannot connect to the access point at this speed.

 

 

 

 

 

 

MCS Table

The MCS Rate table is available only when 802.11 b/g/n is selected in the

 

 

 

802.11 Wireless Mode field.

 

 

 

IEEE 802.11n supports many different data rates which are called MCS

 

 

 

rates. MCS stands for Modulation and Coding Scheme. This is an 802.11n

 

 

 

feature that increases the wireless network performance in terms of

 

 

 

throughput.

 

 

 

For each MCS Rate (0-15), select either Enable (default) to have the NWA

 

 

 

use the data rate. Select Disable if you do not want the NWA to use the

 

 

 

data rate.

 

 

 

 

 

 

Apply

Click Apply to save your changes.

 

 

 

 

 

 

Cancel

Click Cancel to begin configuring this screen afresh.

 

 

 

 

 

6.5 Technical Reference

This section provides technical background information about the topics covered in this chapter. Refer to Appendix E on page 191 for further readings on Wireless LAN.

6.5.1 WMM QoS

WMM (Wi-Fi MultiMedia) QoS (Quality of Service) ensures quality of service in wireless networks. It controls WLAN transmission priority on packets to be transmitted over the wireless network.

WMM QoS prioritizes wireless traffic according to the delivery requirements of the individual and applications. WMM QoS is a part of the IEEE 802.11e QoS enhancement to certified Wi-Fi wireless networks.

 

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NWA1100-N User’s Guide