Ericsson previously sued Samsung in 2006 over patents. Kasim Alfalahi, Ericsson's chief intellectual property officer, noted the lawsuit covered patents related to GSM, GPRS, 3G and LTE mobile phone standards.
The initial agreement struck between the companies expired in 2011, added the exec, and they have not successfully negotiated a new deal yet.
"We have more than 100 agreements with all of the major handset makers," Alfalahi said. "Our way is usually to try to avoid filing lawsuits. We are doing this only as a last resort."
Samsung's response: "This time Ericsson has demanded significantly higher royalty rates for the same patent portfolio. As we cannot accept such extreme demands, we will take all necessary legal measures to protect against Ericsson's excessive claims."