Stoke, a company that specializes in mobile broadband gateways to help carriers manage massive loads of mobile data, announced today that it has landed an additional $17 million in funding led by new investor Focus Ventures.

Given the explosive growth of mobile broadband data with the advent of powerful smartphones and tablets, Stoke’s success is to be expected. The company says it has shipped over 200 units of its SSX-3000 mobile broadband gateway since late 2008. Its 2010 revenues were four times greater than 2009, and Stoke expects massive growth in 2011 as well. The company says it will use the funding to support its current customers, as well as deliver new products aimed at LTE 4G and 3G network optimization.

We previously reported on Stoke’s Mobile Data Offload (MDO) solution, which lets carriers reroute mobile internet connections away from cellular networks — potentially reducing network stress and providing smoother mobile data service in the process.

Companies like Stoke are becoming increasingly important to mobile carriers since they offer a way to use their current networks more efficiently. Merely increasing network capacity sometimes isn’t enough to meet user demand — just look at AT&T’s continued problems in San Francisco and New York. By being smarter and more efficient with their networks, carriers can offer better service to their customers without investing in expensive network upgrades.

Stoke is based in Santa Clara, Calif., and has raised a total of $92 million in funding so far. Existing investors  also participated in the round, including DAG Ventures, Integral Capital Partners, Pilot House Ventures, Net One Systems, DoCoMo Capital, Mobile Internet Capital, Sequoia Capital, and Kleiner Perkins.