Point to Point/Multipoint/Distance/Time 2-voice 2-data Wirel
Introduction
Way with the radio remote data collection, monitoring and control, as opposed to set up special cable (or cable), rental of telecommunication lines, etc., with low cost, quick construction, reliable operation, easy maintenance and so on.
Shenzhen Sinosun’s SCADA series digital radio digital signal processing, error correction coding, software radio, digital modem and an integrated design, surface mount technology, high performance, high reliability and good anti-jamming features. Radio provides a standard RS-232 data port can be connected directly with a variety of multiplexer.
Shenzhen Sinosun radio work in 230MHz, 400MHz, 800MHz and 2.4GHz frequency bands, etc. Almost all of the available transfer rate up to 19.2kbps (2.4GHz radio to 115kbps), BER less than 10E-6 (reception level-110dBm), the emission 0.5-25 watt power adjustable, non-transit communication distance of 30 km for the city, hills, mountains and other geographical environment, and with remote diagnostics, testing, regulatory and other functions, meet the needs of industry dispatch or control center and many distance between station and control two-way real-time data acquisition and real-time, then road transport needs.
Digital radio offers full duplex RS232 digital interface with multiplexer can be achieved both data and voice communications.
System Architecture
Point system architecture
With full-duplex digital radio and multiplexer allows data transmission Road Road voice and structure as below:
Multipoint system architecture
Master device with multiple-point stack, with the road, splitters and omnidirectional antenna cable and antenna sharing system, depending on the location of distribution points set up multiple remote periphery, which constitutes a point to multipoint wireless communication system.
With Shenzhen Sinosun-multipoint radio communication system consisting of FDMA frequency division multiple access (230M/400M/800MHz) and CDMA Code Division Multiple Access (2.4GHz) two kinds of multiple access multiplexing means Canada SRT, Japan’s NEC and Alcatel Carter and other companies to provide point to multipoint system is basically a TDMA time division multiple access multiplexing means. Huaxia Sheng radio frequency division multiple access system capacity is the number of peripheral stations is determined by the number of occupied frequencies, system capacity code division multiple access method in the 2.4GHz frequency band can have 65,000 external stations.
Different wireless access systems, multipoint wireless communication system is the main station and the various peripheral stations to provide a number or two, then one, then two the number of operations, both voice and data transmission independently of each other. Voice dialing function is called with the standard calling a regular telephone, data transmission business is a continuous two-way real-time collection of data standards for transparent RS-232 interface (300 ~ 9600bps). RJ11 telephone interface, the main station and the public telephone network (or the internal switch) networking, data interface RS-232 and LAN networking. General wireless access system to provide telephone service not only to provide data services, even if the MODEM to the telephone line data port, to provide the data services, dial-up rather than 24 hours of continuous real-time data services.
Device Configuration
（Point-device configuration）
Multipoint device configuration (with nine peripheral station, for example)
a. Master (which can take nine external stations provide 18 Relay sessions, 18 serial ports)
Include: digital radio (× 9), multiplexer (× 9), antenna system (× 1), power (× 9), rack (× 3)
b. Peripheral Station (provide two user sessions, two serial ports)
Include: digital radio (× 1), multiplexer (× 1), antenna system (× 1), power (× 1),
Rack × 1)
c. Poor transfer station (to provide single-channel duplex turn bad link)
Include: digital units (× 2), feed system (× 2), power (× 2), rack (× 1)
Some users
Taian Electric Power Bureau, Xintai Power Authority, Qufu Electric Power Bureau, Shengli Oilfield, the Shanghai Seismological Bureau, the Air Force unit, a station in Hunan, Hoda Electric Power Bureau, the Bohai oil field.