Ericsson has launched a US patent infringement case against Samsung, alleging the Korean giant failed to renew a licence granting it use of the company's technology.
Ericsson confirmed on Tuesday that it has already filed litigation with the District Court for the Eastern District of Texas.
The telecoms firm claimed the suit follows two years of negotiation, where the two parties looked to broker a deal under the Fair, Reasonable and Non-Discriminatory (FRAND) terms used in a previous agreement.
"Samsung previously licensed Ericsson's patents in 2001 and renewed in 2007, but its licence has now expired. Ericsson has extended an offer to Samsung to renew the licence during negotiations that have lasted nearly two years," Ericsson said in a statement.
"These negotiations have not been successful since Samsung has refused to take a licence on FRAND terms."
Samsung has since lashed out at Ericsson, claiming it had unfairly increased the price of its royalty rates when negotiating the deal.
"Samsung and Ericsson have previously negotiated and entered licensing deals. This time Ericsson has demanded significantly higher royalty rates for the same patent portfolio," a Samsung spokesman told V3.
"As we cannot accept such extreme demands, we will take all necessary legal measures to protect against Ericsson's excessive claims."
It currently remains unclear what the exact technologies involved in the suit are and at the time of publishing Ericsson had declined V3's request for clarification.
Ericsson did claim the technology at issue is used by hundreds of companies.
"We have more than 100 licence agreements with all major players in the industry," and Ericsson spokesperson told V3.
Ericsson is one of many companies currently suing Samsung for patent infringement. As well as the telecoms technology vendor, iPhone and iPad maker Apple is also embroiled in a slew of patent infringe cases against the Korean giant.