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Network Interconnection

Backhaul is a means of transporting data from a collection of points to a particular point from which it can be distributed over a network. It is a critical step in the design of mobile communications systems, as it links individual end user terminals to the overall network. Both wireline and last-mile microwave interconnection should be evaluated as backhaul possibilities for the rollout of PCS and other mobile network interconnection. Microwave provides an alternate means of connectivity should the initial performance goals, time to market, and/or cost of wireline connectivity be deemed unacceptable.

The backhaul design should take into account the availability and cost of wireline and microwave interconnection based on the cell site locations determined by a collective effort from the RF engineering, fixed network engineering, real estate, and site acquisition teams. The teams should:

1. Identify providers of communications connectivity.
2. Determine current and planned geographic areas, exact date of resource availability, and best attainable rates from communications connectivity companies.
3. Determine optimal switch locations.
4. Design the fixed network, taking into account factors such as the service offering of the interconnect provider, the capability of the network and site equipment, capacity, expected quality of service or network reliability, network topology, redundancy, and any special provisions needed to adopt a leased line or microwave implementation.

Should the wireline option prove to be prohibitive or the economic assessment indicate that microwave is the solution, proceed to our nine-step process to design a microwave path to serve as the backhaul for the system.

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