Psion Teklogix 9160 G2 Manuel d'utilisateur télécharger pdf (Page 195)

Chapter 16: Configuring 802.11 Radio Settings

Configuring Radio Settings

Psion Teklogix 9160 G2 Wireless Gateway User Manual 171

Fragmenta-

tion Threshold

Specify a number between

256

and

2,346

to set the frame size threshold in bytes.

The

fragmentation threshold

is a way of limiting the size of packets (frames) transmitted over the network. If

a packet exceeds the fragmentation threshold set here, the fragmentation function will be activated and the

packet will be sent as multiple 802.11 frames.

If the packet being transmitted is equal to or less than the threshold, fragmentation will not be used.

Setting the threshold to the largest value (

2,346

bytes) effectively disables fragmentation.

Fragmentation involves more overhead both because of the extra work of dividing up and reassembling of

frames it requires, and because it increases message traffic on the network. However, fragmentation can help

improve

network performance and reliability if properly configured.

Sending smaller frames (by using lower fragmentation threshold) may help with some interference problems;

for example, with microwave ovens.

By default, fragmentation is

off

. We recommend not using fragmentation unless you suspect radio interference.

The additional headers applied to each fragment increase the overhead on the network and can greatly reduce

throughput.

RTS Threshold

Specify an

RTS Threshold

value between

and

2347

The RTS threshold specifies the packet size of a request to send (

RTS

) transmission. This helps control traffic

flow through the access point, especially one with a lot of clients.

If you specify a low threshold value, RTS packets will be sent more frequently. This will consume more band-

width and reduce the throughput of the packet.

On the other hand, sending more RTS packets can help the network recover from interference or collisions

which might occur on a busy network, or on a network experiencing electromagnetic interference.

Maximum

Stations

Specify the maximum number of stations allowed to access this AP at any one time.

You can enter a value between

and

2007

Table 16.1 Radio Settings

Field Description

1 2 ... 190 191 192 193 194 195 196 197 198 199 200 ... 435 436

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