Satellite city
Satellite cities are smaller cities that are near to a large city that is the center of a metropolitan area. They are different from suburbs, subdivisions and bedroom communities because they have their own center. Satellite cities could be separate cities outside of the larger metropolitan areas. However, working as part of a metropolis, a satellite city gets "cross-commuting" (people living in the city working outside of the city and people from other places working in the city). For example, London has several satellite cities, like Brentwood, Crawley and Chelmsford. New Haven and Bridgeport are among the satellite cities of New York City. Ipswich, Queensland, is a satellite city of Brisbane, Australia, and Kitchener and Guelph are satellite cities of Toronto, Canada.
Satellite cities are almost self sufficient in terms of amenities and facilities. They usually have all of the things to categorize them as a separate city, but they rely on the parent city or the nearby larger metropolitan area for some of their needs like education or employment.