FRITZ WLAN 7360 Router Manual PDF (Setup & Configuration Guide)

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66

WLAN Standards

WLAN base stations. Each client can then automatically

register at the WLAN base station with the best availabil-

ity.

•

Each IP address may be assigned only once in the wire-

less network.

11.5

WLAN Standards

The Institute of Electrical and Electronic Engineers (IEEE) de-

fined the WLAN standards IEEE 802.11b, IEEE 802.11g,

IEEE 802.11n and IEEE 802.11i.

The IEEE 802.11b, IEEE 802.11g and IEEE 802.11n standards

define the throughput rate within a wireless radio network.

IEEE 802.11i is a security standard.

Standards for the Throughput Rate

Data Throughput

The throughputs listed differentiate between gross and net

transmission rates. The net speed describes the transmission

rate of the user data.

The FRITZ!Box supports your choice of the standards

IEEE 802.11b, IEEE 802.11g and IEEE 802.11n. WLAN devices

based on one or more of the standards listed can be used for

WLAN connections with the FRITZ!Box.

IEEE 802.11b

With a maximum throughput rate of 11 Mbit/s, this is the old-

est WLAN standard. Older WLAN devices of the first genera-

tion can communicate with the FRITZ!Box using 802.11b.

However, if the WLAN device supports newer standards such

as 802.11g, the latest standard should be used.

Standard

Frequency Band

Gross Data Throughput up

to

Net Data Throughput up to

802.11b

2.4 GHz

11 Mbit/s

5 Mbit/s

802.11g

2.4 GHz

54 Mbit/s

25 Mbit/s

802.11n

2.4 GHz

300 Mbit/s

150 Mbit/s

Page 67 / 180

WLAN Standards

67

IEEE 802.11g

This is currently the most common WLAN standard. It commu-

nicates with a maximum of 54 Mbit/s gross in the 2.4-GHz

frequency range (ISM) and guarantees broad compatibility

with many WLAN devices.

IEEE 802.11n

This standard allows for high throughput rates and ranges.

The FRITZ!Box supports 802.11n in the 2.4-GHz frequency

band. Modulation processes and antenna techniques like MI-

MO (Multiple Input, Multiple Output) use the frequency band

more effectively than the older standards.

Thanks to compatibility with the 802.11g standard, you can

also continue to use older WLAN devices.

Setting the Right Standard in the FRITZ!Box

The throughput rate that can be achieved in your WLAN radio

network depends on the WLAN standards used by the inte-

grated WLAN devices. These WLAN standards must also be

set in the FRITZ!Box. Proceed as follows to check which WLAN

standards are set and change them if needed:

1.

Open the FRITZ!Box user interface.

2.

Make sure that the expert mode is enabled in the “Sys-

tem / Expert Mode” menu.

3.

Open the “WLAN / Radio Channel” menu and select “Ad-

just radio channel settings” to make the desired chang-

es.

Make a note of which standards the WLAN devices in your

network are compatible with and then adjust the FRITZ!Box

settings according to the following information:

The use of the 802.11n standard—and thus the availability

of higher throughput rates—is possible only if the WLAN con-

nection is secured using the WPA2 security mechanism (AES-

CCMP).

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68

WLAN Standards

•

Your radio network integrates only WLAN devices that

are compatible with one or both of the following stan-

dards:

802.11n

802.11g

Set the following mode in the FRITZ!Box:

Mode: 802.11n+g

The 2.4-GHz frequency band will be used.

•

Your radio network integrates only WLAN devices that

are compatible with one or both of the following stan-

dards:

802.11b

802.11g

Set the following mode in the FRITZ!Box:

Mode: 802.11b+g

The 2.4-GHz frequency band will be used.

•

Your radio network integrates only WLAN devices that

are compatible with one or several of the following stan-

dards:

802.11n

802.11g

802.11b

Set the following mode in the FRITZ!Box:

Mode: 802.11n+g+b

The 2.4-GHz frequency band will be used.

Page 69 / 180

Frequency Ranges

69

The Standard for Security

IEEE 802.11i

The WPA2 security mechanism is defined in the IEEE 802.11i

standard. WPA2 is an extension of the familiar security mech-

anism WPA (Wi-Fi Protected Access).

The main feature of the extension of WPA to WPA2 is the AES-

CCMP encryption process.

FRITZ!Box supports the AES encryption procedure as part of

the WPA2 mechanism, and the TKIP encryption procedure as

part of the WPA mechanism. This means that the FRITZ!Box

can be used in combination with any WLAN devices that also

support WPA2 with AES or WPA with TKIP.

11.6

Frequency Ranges

WLAN uses the frequency ranges at 2.4 GHz and 5 GHz as its

transmission range.

With the FRITZ!Box you can establish WLAN connections in

the 2.4-GHz range.

2.4-GHz Frequency Band

In the 2.4-GHz frequency band WLAN works in the same range

as Bluetooth, microwave devices and various other devices

like radio-controlled toys, garage-door openers and video

bridges. This means that interference may occur within

WLANs operated in the vicinity of such devices. Generally this

has adverse effects on the transmission rate, including abort-

ed connections.

Mechanism

Encryption

WPA

TKIP (Temporary Key Integrity Protocol)

WPA2

TKIP

AES-CCMP

based on the extremely secure AES (Advanced

Encryption Standard) procedure. CCMP (Coun-

ter Mode with CBC-MAC Protocol) defines how

the AES procedure is applied to WLAN packets.

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70

Frequency Ranges

In the 2.4-GHz frequency range the European regulation au-

thorities have designated 13 channels for WLAN. A channel

can have a bandwidth of 20 MHz (throughput up to

130 Mbit/s) or 40 MHz (throughput of up to 300 Mbit/s).

Channels located directly next to each other in the 2.4-GHz

band may overlap and result in mutual interference. For in-

stance, if several WLANs are operated close to each other in

the 2.4-GHz frequency range with a bandwidth of 20 MHz, a

distance of at least five channels should be left empty be-

tween each two channels used. This means that if channel 1

is selected for one WLAN, the channels 6 through 13 can be

selected for a second WLAN. This maintains the minimum dis-

tance between channels.

Should interference in a WLAN persist, the first step should

be to select a different channel.

WLAN Autochannel

With the WLAN autochannel function, the FRITZ!Box automati-

cally searches for the channel subject to the least interfer-

ence. This process takes into consideration interference from

radio networks in the vicinity (WLAN base stations) and po-

tential sources of interference (for instance video bridges, ba-

by monitors, microwave ovens). Should problems with inter-

ference persist despite this function, try to identify the source

of interference and switch it off manually.

Additional tips on interference in the WLAN radio network are

presented in the section

Ruling Out Interference Caused by

Other Wireless Networks from page 127

.

Allocation of the WLAN Channels in the 2.4-GHz Range

Channel

Frequency (GHz)

Channel

Frequency (GHz)

1

2.412

8

2.447

2

2.417

9

2.452

3

2.422

10

2.457

4

2.427

11

2.462

5

2.432

12

2.467

6

2.437

13

2.472

7

2.442

Rate

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