User guide

LTE TDD B2268H

User Guide

5 Wireless

Issue 01 (2014-01-15)

Figure 5-12 Types of Encryption for Each Type of Authentication

For example, if the wireless network has a RADIUS server, you can choose WPA or WPA2. If

users do not log in to the wireless network, you can choose no encryption, Static WEP,

WPA-PSK, or WPA2-PSK.

Usually, you should set up the strongest encryption that every device in the wireless network

supports. For example, suppose you have a wireless network with the LTE Device and you do

not have a RADIUS server. Therefore, there is no authentication. Suppose the wireless network

has two devices. Device A only supports WEP, and device B supports WEP and WPA.

Therefore, you should set up Static WEP in the wireless network.

It is recommended that wireless networks use WPA-PSK, WPA, or stronger encryption. The other types

of encryption are better than none at all, but it is still possible for unauthorized wireless devices to figure

out the original information pretty quickly.

When you select WPA2 or WPA2-PSK in your LTE Device, you can also select an option

(WPA compatible) to support WPA as well. In this case, if some of the devices support WPA

and some support WPA2, you should set up WPA2-PSK or WPA2 (depending on the type of

wireless network login) and select the WPA compatible option in the LTE Device.

Many types of encryption use a key to protect the information in the wireless network. The

longer the key, the stronger the encryption. Every device in the wireless network must have the

same key.

5.7.2 Signal Problems

Because wireless networks are radio networks, their signals are subject to limitations of

distance, interference and absorption.

Problems with distance occur when the two radios are too far apart. Problems with interference

occur when other radio waves interrupt the data signal. Interference may come from other radio

transmissions, such as military or air traffic control communications, or from machines that are

coincidental emitters such as electric motors or microwaves. Problems with absorption occur

when physical objects (such as thick walls) are between the two radios, muffling the signal.

5.7.3 BSS

A Basic Service Set (BSS) exists when all communications between wireless stations or

between a wireless station and a wired network client go through one access point (AP).

Intra-BSS traffic is traffic between wireless stations in the BSS. When Intra-BSS traffic

blocking is disabled, wireless station A and B can access the wired network and communicate