The docking ring is the outer circular structure of Deep Space 9 and Nor-class space stations where starships can dock. The six docking pylons are part of the structure. The docking ring also had cargo bays and mining facilities. (DS9 episode: "Emissary"

In 2372, when a peace conference chaired by the Valtusians was held on Deep Space 9, all of the berths on the docking ring were occupied by ships. (DS9 novel: The Heart of the Warrior)

In 2376, the Androssi were making preparations to install quantum torpedo bays on Empok Nor's docking ring. (SCE eBook: Cold Fusion)

Deep Space 9 sections, facilities and establishments
Sections	central core (upper core • Mid-core • Lower core - Fusion core) • Habitat ring • Docking ring • Docking pylon • Crossover bridge • Defense sail
Facilities	amphitheatre • assay office • Bajoran temple • infirmary • Medical D • Mineral assay office • Operations center • Promenade • Runabout pad • School • Security office • Station commander's office • Wardroom
Establishments	Bal Cabarin • Galactic Adventures • Galactic Pets • Games Bazaar • Garak's Clothiers • Greengrocers • Klingon restaurant • Quark's • Replimat • Spican Jewelers • Starlight Lounge • Tourism Office • T'Pril's