VW801, VW802, VW803, VW804 Serial-WiFi Modem User Manual
Vitalwell Electronics (Zhuhai) Pte. Ltd. www.vital-well.com
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2. FUNCTIONAL DESCRIPTION
Notes for symbols
:
AP
:
that is the wireless Access Point, the founder of a wireless network and the centre of the
network nodes. The wireless router we use at home or in office may be an AP.
STA
: short for Station, each terminal connects to a wireless network (such as laptops, PDA and
other networking devices) can be called with a STA device.
2.1. Wireless Networking
VW801 series modem can be configured as both wireless STA and AP base on network type. Logically
there are two interfaces in VW801: STA or AP. When VW801 operates as AP, other STA equipments
are able to connect to VW801 modem directly. Wireless networking with VW801 series modem is very
flexible.
In the following diagram, we
’
ll use VW801 as example.
2.1.1. Basic Wireless Network Based On AP (Infrastructure)
Infrastructure: it
’
s also called basic network. It is built on AP and many STAs which join in.
The characters of network of this type are that AP is the centre, and all communication between
STAs is transmitted through the AP. The following figure shows this type of networking.
Figure 3. VW801 Basic Wireless Network Structure
2.1.2. Wireless Network Based On AP+STA
VW801 series modem support AP+STA network mode, means VW801 support one AP interface and
one STA interface at the same time, as following figure,