Early last year, the "Rockstar" consortium backed by Apple, Microsoft, BlackBerry, Sony and Ericsson closed its purchase of thousands of patents previously owned by Nortel for $4.5 billion (around the same time Google, after failing to purchase the patents itself, closed a $12 billion deal for Motorola). That transaction cleared the DOJ as the team agreed to license the tech on "fair, reasonable and non-discriminatory terms, as well as their commitments not to seek injunctions in disputes involving SEPs." According to Reuters, Rockstar -- along with another company, Netstar -- has picked today to file a lawsuit against Google over seven of the patents, reportedly covering the ability to match internet search terms to advertising. TechCrunch lists other lawsuits filed against cellphone manufacturers including Samsung, LG, ASUS, HTC, Pantech, ZTE and Huawei. All of these companies build Android-based devices, so it appears that despite all the other ongoing lawsuits and license agreements, it's time for another round of patent warfare to start.