GONSIN DCS-3021, Руководство пользователя

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Chapter 4 Wireless Network Design
4.1 Introduction
GONSIN30000 system is composed of three parts: GONSIN30000 server, WAP-30 wireless AP, and DCS-3021
congress terminal.
This chapter describes how to design a wireless network.
4.2 Control Rules
Control rule 1: control capability
GONSIN30000 server can control up to 500 devices within a wireless network.
Control rule 2: coverage range
In order for the wireless parts to operate better, all wireless congress terminals must be within the coverage range
of the wireless AP. Theoretically, the maximum coverage range for the AP is 30m×30m. During use, determine the
actual coverage range of the AP.
Control rule 3: frequency
This wireless network must work within a frequency band that is different from the working frequency of adjacent
PC network. Refer to Section 1.3.
4.3 Frequency Band
4.3.1 Specifications
This wireless network is based on 2.4GHz wireless communication technology, so all devices work within the
frequency band 2.4000~2.4835 GHz.
4.3.2 Wireless PC Network
The wireless PC network is based on 2.4GHz wireless communication technology as well and there are 13
channels available on the PC network. Refer to Figure 1.2.
4.3.3 Carrier
In GONSIN30000 system, the frequency band 2.4GHz is divided into 85 channels; where, channel ( 0 )and
channels 80~84 are reserved for communication of fixed purpose. Channels 1~79 are switchable. Refer to Figure
1.3.
4.3.4 Interference
DCS3021 system will cause interference to the wireless network of PC. Make sure the wireless carrier of the
DCS3021 system does not overlap with the WLAN channel.
4.3.5 Example
Refer to Figure 1.4. In this example, the WLAN works on channel 3 which overlaps with the wireless carriers 10~35
of GONSIN30000. Therefore, it is advisable to use frequency other than carriers 10~35 in order to ensure
communications effect.
Use special measuring instruments to measure the actual wireless environment or use third-party measuring APP
for evaluation.
Notes:
Though this system can work at any frequency, make sure to abide by specific frequency control rules of the
country you locate.
4.4 Installation Rules
As a wireless communication device, the DCS3021 should be installed in accordance with requirements of
wireless communication products. Remove any obstacle set between the wireless communication devices
(communication range will be narrowed by obstacles) and remove any metal around (wireless signal is easily
interfered by metals, especially aluminum). The wireless devices shall be kept as least 1~2m away from electronic
products (electronic products such as starter, air conditioner, microwave stove, and TV set will emit radio wave
which will interfere with wireless signal).
The degree of impact on radio signals varies with the different kinds of materials:
Minor impact – glass, wood, gypsum, asbesto
Major impact – water, brick, stone
Completely block – marble, cement, concrete, metal
The following instructions should be followed when you are installing the wireless AP WAP-30.
4.4.1 Installation Height
WAP-30 must be installed at 2.5m height at least to avoid human body from blocking communication between the
WAP-30 and DCS-3021.
4.4.2 Installation Distance
The communication distance between WAP-30 and DCS-3021 should be as close as possible and within 30m.
4.4.3 Installation Environment
Do not set any metal or electronic product that will produce radio wave within 2m range of the WAP-30.
Figure 1.4 Signal interference example
Figure 1.3 Wireless channel of the GONSIN30000 system
Figure 1.2 WLAN channel
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4.3 Function and Indication of Wireless Conference Terminal and Wireless Converter
DCS-3021 Congress System