COW : Cells On Wheels

A cell on wheels, usually referred to as a COW, is a mobile cell site that consists of a cellular antenna tower and electronic radio transceiver equipment on a truck or trailer, designed to be part of a cellular network.

COWs are used to provide expanded cellular network coverage and/or capacity at special events such as major sporting events , major conventions, or in disaster areas where cellular coverage either was never present (e.g., in a wilderness area where firefighters have set up a command center during a major forest fire) or was compromised by the disaster . 

Many telecommunications companies also use COWs for long-term placement when financing or infrastructure considerations prevent building a permanent site at the location. For instance, a carrier may have approved the placement of a cell site for coverage reasons, but the remaining budget is inadequate to fund the construction for a fiscal quarter or even longer. An engineering team may be able to place a COW on location to provide immediate coverage with few costs other than leasing, electricity, and backhaul. The decision to use a COW for an extended period of time may also be driven by the property owner. Installations on government or military facilities may be granted only on a temporary basis, and may require the use of non-permanent facilities.

A COW may also be referred to as a site on wheels (SOW). Not all portable communication centers are created equally. Many are nothing more than a cargo trailer or box that has been modified to hold communication equipment and have an antenna tower. Tower types vary from one manufacturer to another; guyed vs. unguyed, methods of deploying the tower. Many COWs do not protect their sensitive equipment from the effects of lightning or power surges. The backhaul to the network can be via terrestrial microwave, communication satellite, or existing wired infrastructure.

Example :

Cell On Wheels- Truck (COW)MODEL No.RDV

SELF CONTAINED UNIT WITH

1. Its own power supply –generator

2. Fuel tank as additional fuel supply

3. Shelter or open air BTS frame for outdoor units

4. Smaller deck space than trailer type

ADVANTAGES

1.No concrete or foundation or ground anchoring required, stable on its own

2. Excellent mobility

3. Fast Deployment – 1hr.

4. Could travel at 120 Km/Hr.

5. Ability to reach destination quickly

6. Could lock at multiple heights.

7. Advertising space on shelter sides.

8. Could be used as disaster recovery unit.

9. Ideal  for road shows, short festivals, sports events etc.
 

http://en.wikipedia.org/wiki/Cell_on_wheels