Nielsen, the measurement and media firm, has bought out mobile measurement and metric firm Telephia. Terms of the transaction, which is subject to regulatory approval and expected to close in Q3, were not disclosed.

Telephia has been in a tough competitive fight with its younger counterpart M:Metrics, and have also been involved with lawsuits against each other. The company, based in San Francisco, was founded in 1998.  For Nielsen, the deal comes three weeks after Nielsen unveiled Nielsen Wireless to assess and measure mobile content. More details on MocoNews.net, here.