How to bridge the gap between LMR and wireless broadband

In this final article of the LMR 200 series, we discuss program- and project-management techniques from the perspective of both a practitioner and vendor. Proper planning and management of capital and operating expenditures — now and in the future — and a focus on resource management will allow network operators to stretch budgets further than ever before.

Appropriate planning is the cornerstone to resource management, and a successful implementation will minimize overlapping services and wasted utilities. Proper staging and deliveries are key program and project-management functions; as such, careful planning is required to best manage scarce personnel, space and fuel.

With new broadband layering — via technologies such as LTE — on the horizon, careful project planning today should allow for future growth. Key considerations include tower, building and rack physical space; air-conditioning electrical capacity; backhaul; transfer switching; and power backup systems, from the uninterruptible power supply to the battery banks.

Meanwhile, network operations and interoperable platforms, such as the Project 25 Inter-RF Subsystem Interface (ISSI), should be reviewed for future connectivity to a broadband network.

Project-management techniques can be adjusted to account for resource management and for future expansion. When planning to use tower crews for a project, the work order can include cleaning old antennas and coaxial lines to accommodate current and future system additions. If a tower structural analysis is required, anticipate the addition of broadband antennas, as well as coaxial or CAT-5 lines.

A work order also can include requirements for broadband additions, such as fiber optics to the tower and additional power capacity from the electric utility. Other requirements may include space for an additional shelter in the site compound or outside cabinets to house an LTE base station (ENodeB) or generator.

As the land-mobile-radio (LMR) system is planned, certain tasks let a project manager use resources wisely and prepare for future activities. Starting with permits, zoning, civil engineering, and FCC and FAA authorizations, a project manager can use the prospect of a future broadband layer to properly set specifications that will enable future growth. For instance, if a tri-sectored antenna system is anticipated, then civil requirements can be dimensioned accordingly. The same can be said for site-related elements, including the shelter, grounds, trenches to utility rights of way, and the radio tower.
The same principles apply in most rooftop installations, with some variations caused by available space in the rooms where the landlord allows equipment. There can be complications with added coaxial cable runs and antenna mounting, because it may be difficult to obtain permits and zoning if devices can be seen from the ground, other buildings or rooftops. When combined with civil engineering, FCC and FAA authorizations, a project manager has a more challenging task with rooftop sites.