Enabling Robust Metropolitan Wireless CCTV for Public Safety
LEVER’s customer is the Metropolitan Council of a large Borough town in England.
One of the Council’s responsibilities is the provision of a secure and reliable CCTV network across the town centre out to the suburbs, to enhance public safety, deter crime and attract new business.
The CCTV network was to be upgraded to incorporate some 300 camera locations, however cost savings were essential.
This led the Council to consider a Metropolitan-scale outdoor wireless network to replace leased circuits and 4G mobile network connections.
LEVER’s customer had several major objectives:
As part of their CCTV network modernisation programme, the Council wished to evaluate the extent to which a city-wide outdoor Wireless Network Infrastructure could cut their costs for leased lines and 4G mobile network services.
LEVER was selected for this substantial outdoor wireless network project on recommendation from a City council customer for whom LEVER had delivered a similar and highly successful project.
LEVER’s consultative approach, supplier independence and innovation in the field were further reasons behind the choice.
In essence, LEVER was recognised as an authority in outdoor wireless network engineering, and had a clear track record of success.
The outdoor wireless network needed to support 300 new CCTV cameras installed at 100 different locations across the town out to the suburbs, with high availability for reliable 24×365 CCTV monitoring.
The network would also provide backhaul for a town centre public Wi-Fi network.
LEVER was also tasked with producing Invitation To Tender (ITT) documentation for the council in a way that:
LEVER worked closely with the Council to scope the project, which included:
LEVER presented the customer with a comprehensive project proposal incorporating:
LEVER’s network design was a sophisticated “Star of Stars” design with a resilient central Ring network, using the Council’s buildings, and those of selected third parties, as Tower and Relay locations.
All 100 camera locations were able to use either direct or relayed wireless links, providing maximum cost savings.
All wireless links were designed to carry the requisite CCTV camera traffic, with comprehensive Traffic Modelling and Link Budget calculations that incorporated margins for link fading whilst maintaining 99.95% availability.
The network was designed to enable the use commoditised wireless equipment in selected locations, subject to carefully-written minimum specifications to ensure fitness for purpose and reliability in use. This enabled the Council to make significant further costs savings.
A good number of ITT bids were received and several suppliers were shortlisted.
All proposals were reviewed for technical merit and compliance by LEVER, leading to final bidder selection, presentations and a successful bidder being selected.
The network has been rolled out and is providing reliable CCTV services for the Council and the local population.
LEVER’s network design provided a solid foundation for ITT proposals.
Economies of scale meant Bidders did not need to absorb or pass on any survey or design costs.
The Council was able to evaluate ITT submissions more easily because they were based on a common reference design.
- Ian Lever, Senior Project Manager
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