Microsoft is suing Motorola, accusing the latter of "charging excessive royalties on network technology used in Microsoft's Xbox game system."Reuters
states that, "The suit, filed in federal court in Seattle, comes a month after Microsoft charged that its former ally Motorola infringed a number of its patents in its Android-based smartphones, which run on software built by Google Inc."
Microsoft is claiming that "Motorola breached its commitments to standards organizations that allow other companies to license its patents relating to wireless technology and video coding, which are used in Microsoft's Xbox gaming console."
The case is 2:10-cv-01823, complaint filed in the United States District Court for the Western District of Washington at Seattle.