Siemens AG has agreed to buy the rail signaling business of Invensys (LSE: ISYS) for $2.9 billion.www.siemens.com

Vivendi SA has received four non-binding offers of more than €6 billion for Brazilian broadband unit GVT SA, according to Reuters. Bidders were: DirecTV, America Movil, Liberty Global and a group of undisclosed private equity firms. Vivendi had been hoping for €7 billion offers, but none have yet arrived.www.vivendi.com

Workshare, a British provider of enterprise collaboration applications, has acquired IdeaPlane, a UK-based enterprise social network for highly-regulated industries. No financial terms were disclosed. www.workshare.com

EQT Partners and GIC next week will begin a €4 billion sale process for German scientific publisherSpringer Science+Business Media, according to Reuters. The firms also are running a parallel process to take Springer public next spring.

Selecta Biosciences Inc., a Watertown, Mass.-based developer of synthetic vaccines and immunotherapies, has entered into a global collaboration with Sanofi (NYSE: SNY) to discover targeted antigen-specific immunotherapies for life-threatening allergies. Under terms of the deal, Selecta could receive up to $300 million in milestone payments, plus up to another $600 million in royalty payments. Selecta has raised over $75 million in VC funding from Rusano, OrbiMed Advisors, Polaris Venture Partners, Flagship Ventures, NanoDimension and Leukon Investments. www.selectabio.com

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