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How to deploy IP-based city surveillance network architecture

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Deepa
New Update

Subhasish Gupta, country manager, India & SAARC, Allied Telesis

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IP based city surveillance network is the third eye for police. All the locations mapped for surveillance must be able to capture and store the videos. Video file size is large compared to file size in traditional business.

Due to large size and continuous video streams getting captured, the transport i.e. the backbone network as well as access network must provide the sufficient bandwidth to support the stream size.

Here the backbone network represent the IP based network connecting all the IP surveillance cameras, NVRs, DVRs, network monitoring software, network monitoring stations, network based storage, alerting stations, SMS servers, SMS gateways, electronic alarm system and many more equipments connecting and communicating within them should have continuous connectivity to send and receive the data captured.

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IP Surveillance based city surveillance logical diagram is as shown below.

IP based network consists of core-distribution and access connectivity. Core network should have high bandwidth connects distribution network. Primarily the servers are getting accessed by various application devices or users. The bandwidth requirement is very thick. Core network consists of core switches providing fast switching.

Distribution network is connecting to access network to core network. This distribution network can have links provided by various service providers for connectivity. The connectivity between the distribution switch/router can be leased line or IP VPN or MPLS network. For customers the technologies implemented within service provider is not known.

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Distribution network is implemented with routing protocols viz.

OSPF and BGP, access-lists. Access network connects the IP cameras and various other hosts to network.

Port-based security must be implemented to restrict the unauthorized devices connectivity to the network by unauthorized entity.

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The IP surveillance network must be monitored for uptime to store all the videos captured.

NMS monitoring includes following points:

1. Core switches reachability & uptime

2. Distribution switches reachability & uptime

3. Access switches reachability & uptime

4. IP cameras reachability & uptime

5. Switches, IP cameras remote management

6. WAN link uptime & bandwidth monitoring

7. Application servers and all other IP based equipment reachability &

remote management

8. Graphical representation of LAN, WAN and other equipments

9. Automatic topology discovery and creation of network maps

10. Layer 3 network

11. Layer 2 network

12. VLANs

13. EPSR rings

14. Network inventory

15. IP networks nodes, cards, ports, physical links

16. VLANs, VLAN interfaces, EPSR domains

17. Fault management

18. Event and alarm notification

19. System logs and audit trails

20. Performance management

21. Security management

Network monitoring can be seen as below.

The video captured in the IP surveillance network is useful for real-time monitoring or as historic data used during investigation of particular cases.

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