Nokia and Qualcomm will continue their mammoth legal dispute over payments, despite a $20m (£10m) payment Nokia has made to Qualcomm for the right to use 3G-related patents for the next six months.

The mobile giant and wireless firm are in the process of renegotiating a patent licensing agreement that expires on 9 April.

The payment does not extend that agreement, though. Instead, Nokia said, it is for licences that Qualcomm provides through the European Telecommunication Standardisation Institute (ETSI), the organisation responsible for the Universal Mobile Telecommunications System (UMTS) 3G mobile phone standard, among others.

The two companies have conducted their negotiations as much in the courts as elsewhere.

On April 3, Qualcomm filed suits in two US District Courts, seeking to block sales of Nokia phones using Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS) and Enhanced Data Rates for GSM Evolution (EDGE) technology because, it said, they infringed on its patents. Qualcomm has similar patent enforcement actions pending in the UK, France, Germany, Italy and China, it said.

Last month, Nokia filed suit against Qualcomm in the Netherlands and Germany, arguing that it shouldn't have to license some Qualcomm patents because its suppliers had already paid to license the disputed technology themselves.

Nokia sees the $20m (£10m) payment as fair and reasonable compensation for use of Qualcomm patents in its UMTS handsets, it said.

When the companies' patent agreement expires on April 9, some of Qualcomm's earlier patents expire with it, Nokia said, adding that it expects Qualcomm's patent portfolio to become less relevant to its UMTS handset production.

In a parting shot, Nokia warned that it too holds patents that cover Qualcomm's Wideband Code Division Multiple Access (WCDMA) semiconductor products.