The timetable for PSP was revealed this week as part of a hypothetical tender document, published by Ofcom. The document invited companies to make "shadow" pitches setting out their plans for the service, which would eventually be put before a panel of industry experts at a seminar on 2 December.
The document proposed that PSP could run until 2016, when the service would be reviewed alongside the BBC's royal charter.
When Ofcom first aired the concept of PSP, it proposed that the service would broadcast three hours of content a day, accessible via television, the internet and mobile phones. It would be funded by top-slicing the licence fee, by taxpayer funding or by a tax on broadcasters.
The Ofcom chief executive, Stephen Carter, said: "This hypothetical tender will hopefully help to ascertain whether the idea of a public service publisher has practical and operational merit."