Application scheme of wireless video monitoring system based on TD-SCDMA network
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TD-SCDMA overview
TD-SCDMA——Time Division-Synchronous Code Division Multiple Access (Time Division-Synchronous Code Division Multiple Access) is one of the third-generation mobile communication space interface technical specifications officially released by the ITU (International Telecommunication Union). It has obtained CWTS Full support from the China Wireless Communication Standards Research Group and 3GPP. It is China Telecom’s first complete communication technology standard in 100 years, and it is a solution that can replace UTRA-FDD. It is a mobile communication technology that integrates the advantages of CDMA, TDMA, and FDMA technologies, with large system capacity, high spectrum utilization, and strong anti-interference ability. It uses smart antennas, joint detection, relay switching, synchronous CDMA, software radio, low chip rate, multi-slot, variable spread spectrum system, adaptive power adjustment and other technologies.
The advanced mobile wireless system presented by TD-SCDMA is designed for symmetric and asymmetric 3G services in all wireless environments, and it runs on unpaired radio frequency spectrum. The time-domain adaptive resource allocation in the transmission direction of TD-SCDMA can achieve the best utilization rate of spectrum allocation independent of the symmetrical business load relationship. Therefore, TD-SCDMA can support all 3G services such as voice and Internet at rates from 8kbps to 2Mbps through the best adaptive resource allocation and best spectrum efficiency.
The first part needs analysis
With the rapid development of various network technologies, the rapid improvement of video processing capabilities, and the gradual popularization of 3G networks, video surveillance has entered the era of all-digital networks, which is commonly referred to as the third-generation video surveillance system. Digital surveillance has received increasing attention and attention due to its intuitiveness, convenience and rich content.
For the digital video network monitoring system involved in security, due to industry characteristics, there are many data collection points, and a large number of video terminal equipment needs to be configured accordingly. In the past, digital video network monitoring systems were basically based on local area networks or private networks. . Therefore, the transmission medium is affected to a certain extent in the application at different points. For example, in the remote suburbs or in the urban area where various intricate communication lines were originally deployed, the network line is re-routed. The cost and difficulty of the transmission network can be imagined. In the medium, 3G wireless routers have become the new darling of digital security in the new century. For example, wireless video surveillance applications based on TD-SCDMA networks are about to be widely adopted in many industries and government departments, from the initial financial sector to banking, radio and television, petroleum, electric power, communities, computer rooms, environment and other industries, and there have been many successes. Case.
At present, Xiamen Sixin Communication Technology Co., Ltd. has developed several 3G wireless router products based on the needs of video transmission in various industries and the mature application of 3G networks. Based on the 3G network video monitoring system, the terminal video server and the monitoring center can pass through 3G. The wireless router performs remote video image transmission, real-time remote video transmission and mobile monitoring purposes. The monitoring center can arbitrarily adjust the real-time images of one or more monitoring equipment. At present, in the domestic video surveillance based on TD-SCDMA wireless network, the actual measurement is very mature, the transmission quality is smooth, the image is clear, and many industry customers have actually adopted it. In this plan, the F3520 TD-SCDMA Router is used as an example to illustrate the plan. Implementation application.
The second part of the system composition
This system is composed of monitoring center, F3520 TD-SCDMA Router, video server and camera.
One) Introduction to video server
Note: According to the application environment and requirements, use the appropriate video server of different brands, but it should be noted that the video server must support the setting of the local IP address and gateway.
The video server used in this program is Hangzhou Hikvision DS-6101HF video server
Product type: Hikvision video server, DVS.
Video compression standard: H.264.
Video processing chip: DAVINCI processor.
Features
Based on the latest TI DAVINCI processor platform development, high integration;
Using H.264 video compression technology, the compression ratio is high, and the processing is very flexible;
Support complete TCP/IP protocol cluster, support video, audio, alarm, voice data, serial data through TCP/IP
network transmission;
Support PPPOE, DHCP protocol;
Built-in WEB preview function, which can be accessed by IE;
Supports the control of PTZ and motorized lens, supports multiple decoder protocols, and can perform preset, cruise, and trajectory
Set up and call;
RS-232 interface supports network transparent channel connection;
Support two-way duplex voice intercom and one-way language broadcast;
With alarm input, motion detection alarm, occlusion alarm, alarm linkage output and other alarm functions;
Support watermarking technology;
2. Features of F3520 TD-SCDMA Router
F3520 TD-SCDMA ROUTER uses high-performance industrial-grade ARM9 communication processor, embedded real-time operating system as the software support platform, the system integrates a full range of communication protocols from the logical link layer to the application layer, supports static and dynamic routing, PPP server and PPP client, VPN (including PPTP and IPSEC), DHCP server and DHCP client, DDNS, firewall, NAT, DMZ host and other functions. Provide users with a safe, high-speed, stable and reliable wireless routing network with various protocol routing and forwarding. This product has been widely used in finance, water conservancy, environmental protection, electric power, postal, meteorological and other industries.
1. Wireless parameters
1) TD-SCDMA: 2010~2025MHz
2) GSM: 850/900/1800/1900
3) UPLINK: 384Kbps, DOWNLINK: 2.8Mbps
2. Hardware system
1) Industrial-grade ARM9 CPU, main frequency 200M
2) FLASH: 4MB (expandable to 16MB)
3) SDRAM: 16MB (expandable to 64MB)
4) E2PROM: 64KB
5) Interface:
1 10/100M Ethernet port
1 RS232 serial port. (RS422/RS485 can be supported as required), serial port rate 110~230400bits/s
Indicator light: There are five indicator lights “Power”, “Online”, “Alarm”, “System”, and “Link/ACT”.
Antenna interface: standard SMA female antenna interface, characteristic impedance 50 ohms.
SIM/UIM card interface: standard drawer type user card interface (3V/5V).
Power interface: standard 3-core locomotive power socket.
“Reset” reset button, through this button, the parameter configuration of ROUTER can be restored to the factory value.
6) Power supply:
External power supply: DC 9V 1.5A
Wide voltage power supply: DC 5-35V
Communication current: <450mA (9V) Standby current: <35mA (9V) 7) Wireless module Adopt high-performance industrial-grade TD-SCDMA wireless module 8) Dimensions Dimensions: 157x97x25 mm (not including antenna and mounting parts) 9) Other parameters: Working environment temperature -25~+65oC Storage temperature -40~+85oC Relative humidity 95% (non-condensing) 3. Software function 1) Support VPN security tunnel function, including PPTP+MPPE and IPSEC 2) Intelligent anti-dropping, support for online detection, online maintenance, and automatic redial after offline to ensure that the device is always online. 3) Support IPTABLES firewall, packet filtering function 4) Support multiple protocols: TCP/IP, UDP, ICMP, SMTP, HTTP, POP3, OICQ, TELNET, FTP, etc. 5) Support dynamic routing and static routing 6) Support DHCP function 7) Support NAT function, such as SNAT, DNAT 8) Support dynamic DDNS 9) Support DMZ host 10) Support routing and forwarding, and also support serial data transmission, and data center management 11) Support VPDN network 12) Convenient WEB configuration, support remote WEB management 13) Support telnet management, convenient and easy-to-use console shell interactive environment 14) Support multiple terminals to share router ppp WAN export 15) Support multiple wireless dialing methods: automatic allocation, designated IP, designated local peer IP 16) Support as a PPP server, multiple authentication methods, support two-way authentication 17) Easy-to-use COM and SYSLOG system diagnosis and debugging functions 18) Support serial port local software upgrade 19) Support remote upgrade of TFTP software 20) Support both LINUX and WINDOWS operating systems Three) Central monitoring room
The central monitoring room has broadband network, server, PC, monitoring software and display screen, etc.
Part III Networking Implementation
This networking solution is to establish a VPN tunnel to transmit video images based on the TD router connected to the public network monitoring center. The networking implementation is as follows:
a) Monitoring center: It has a fixed IP or domain name on the public network, establishes a VPN server on a PC, and maps all ports to the VPN server machine. For specific VPN server establishment methods, please refer to the “VPN” of Xiamen Sixin Communication Technology Department Server establishment instructions” (available from the technical department).
b) TD router: Configure the SIM card that activates the mobile TD service, configure VPN (PPTP or L2TP) and other necessary functions. For the specific configuration method, please refer to the “F3520 Route User Manual” from Xiamen Four-Faith Communication Technology Department.
c) Video server: Configure the same network segment as the IP address of the video server and the address of the TD router, and the gateway points to the address of the TD router. For other functional configurations, please refer to the instructions for each brand of video server.
Take the above picture as an example, the terminal is the video server of 192.168.1.10 and 192.168.1.11. After passing through the VPN tunnel established by the TD router and the monitoring center, the tunnel IPs 200.200.200.6 and 200.200.200.5 are obtained respectively. Normally, there are three tunnels. IPs can directly communicate with each other.
Please contact for complete plan
Xiamen Sixin Communication Technology Co., Ltd.
Address: J1-J2, 3rd Floor, No. 44 Guanri Road, Software Park, Xiamen
Phone: 0592-6300324, 6300325
URL:
http://www.four-faith.com
Fax: 0592-5912735
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