Mobile World Congress: What to expect from the 2014 trade show

Portable technology businesses are descending on Barcelona for the Mobile World Congress.

The mobile sector's annual trade show covers a broad range of gadgets, from smartphones and tablets to fast-emerging new areas such as wearable technology and the internet of things.

In 2014's event there are 1,800 exhibitors vying for the attention of a likely 75,000 delegates and 3,500 journalists.

Mark Gregory looks at what to expect.