Core Viewpoint - The ongoing patent dispute between MediaTek and Huawei has intensified, with MediaTek's subsidiary HFI Innovation filing a lawsuit against five Huawei subsidiaries for infringing on a European patent, indicating a retaliatory response to Huawei's previous claims against MediaTek [1][2]. Group 1: Patent Disputes - MediaTek's lawsuit in the European Unified Patent Court is a continuation of the patent conflict that began in 2022, highlighting the escalating tensions between the two companies [1][2]. - Huawei initiated several lawsuits against MediaTek in China in May and August 2023, claiming infringement of its Chinese patents related to mobile communication technologies [2]. - MediaTek's counteraction includes a lawsuit filed in July 2024 in the UK, accusing Huawei of infringing on three of its 4G/5G patents and seeking an injunction [3]. Group 2: Background of the Dispute - The patent battle traces back to March 2022 when Huawei sought licensing fees from MediaTek for its essential 5G patents, but negotiations failed due to MediaTek's refusal based on FRAND (Fair, Reasonable, and Non-Discriminatory) terms [2]. - Following the unsuccessful negotiations, Huawei filed a patent infringement lawsuit against MediaTek in May 2024, which may involve various mobile communication technologies [2].

Core Viewpoint - The ongoing patent disputes between MediaTek and Huawei are escalating, with both companies engaging in multiple lawsuits across various jurisdictions, highlighting the competitive landscape in the semiconductor industry and the complexities of patent licensing agreements [5][7]. Group 1: Patent Disputes - MediaTek's subsidiary HFI Innovation has filed a lawsuit against five Huawei subsidiaries for infringing on European patent EP2689624, which pertains to LTE technology [2]. - The patent conflict has intensified following Huawei's unsuccessful negotiations with MediaTek for licensing 5G standard essential patents, leading to Huawei initiating its own patent infringement lawsuit against MediaTek [5][7]. - Both companies are involved in numerous legal battles across China and Europe, with Huawei holding over 120,000 patents, of which 14.59% are 5G standard essential patents, while MediaTek possesses over 13,000 patents [7][8]. Group 2: Licensing Models - The primary contention between MediaTek and Huawei revolves around the licensing fee model, specifically whether to charge at the "terminal level" (to smartphone manufacturers) or the "chip level" (to chip manufacturers) [7]. - Huawei's strategy aims to shift the licensing fee structure to chip manufacturers, which could potentially streamline the licensing process given the limited number of major chip manufacturers globally [7]. Group 3: Patent Challenges - Both companies have initiated challenges against each other's patents, with MediaTek reportedly contesting at least ten of Huawei's patents, although results from these challenges are still pending from the National Intellectual Property Administration [8].