February 18 (Reuters) - Ericsson has filed a lawsuit against Acer in federal court in the U.S. state of Delaware, seeking a ruling that the Swedish telecoms company is not infringing on Acer's patents related to 4G and 5G wireless communication standards.

Ericsson said in the lawsuit announced Wednesday that Taiwan-based Acer had breached its obligation to license its core patents on fair terms and threatened to file a lawsuit for patent infringement.

Acer spokespeople have not yet responded to a request for comment on the lawsuit. An Ericsson spokesperson declined to comment.

Standard core patents cover the technology necessary for devices to implement standards such as 4G or 5G wireless networks, and international organizations that set such standards require licensing under fair and reasonable terms. Wireless communication standards have been at the heart of numerous patent disputes involving technology companies such as Ericsson, Acer, Apple, Samsung, and others.

Acer filed a lawsuit against customers of Ericsson, Verizon, T-Mobile, and AT&T in a federal court in Texas last month, accusing them of infringing on its patents by using Ericsson's cellular base stations.

The new lawsuit states that Acer's claims against the companies "made it clear that it intends to take action against Ericsson's base station equipment, posing an imminent threat of Acer filing a patent infringement lawsuit against the Swedish company."

Ericsson stated that it met with Acer but was unable to resolve the dispute between the two companies. It asked the court to rule that it had not infringed on Acer's patents and that Acer had failed in its duty to negotiate in good faith, in addition to requesting an unspecified amount of monetary damages.