Prior art

Based on the provided authoritative patent text for US Patent 11641661B2 (Methods and apparatuses for determining quasi co-location (QCL) assumptions for beam operations), there is no explicit section titled "References Cited" that lists external prior art patent documents. The Google Patents interface for US11641661B2 only shows "Prior art keywords" and patents that "Cited By" this patent, rather than patents cited by US11641661B2 as prior art.

However, the patent explicitly cross-references and claims priority from two related applications, which are foundational to its disclosure and thus highly relevant for understanding its scope and legal history. While these are typically considered priority documents rather than anticipating prior art under 35 U.S.C. § 102 (assuming the claims are supported by them), they are the most direct "patent citations" mentioned within the patent's descriptive text.

Here are the details for these related applications:

1. U.S. Provisional Patent Application Ser. No. 62/754,165

   • Full Citation: U.S. Provisional Patent Application Ser. No. 62/754,165.
   • Publication/Filing Date: Filed on November 1, 2018.
   • Brief Description: Titled "Method and Apparatus for Spatial QCL assumptions with Overlapped CORESETs," this provisional application establishes the earliest priority date for the subject matter disclosed in US11641661B2. It details methods and apparatuses concerning spatial Quasi Co-Location (QCL) assumptions, particularly when Control Resource Sets (CORESETs) overlap.
   • Potential Anticipation under 35 U.S.C. § 102: As a priority document, this provisional application is intended to support the claims of US11641661B2, rather than anticipate them. If any claim in US11641661B2 (e.g., Claim 1 or Claim 9, which describe monitoring CORESETs and applying QCL assumptions based on a lowest CORESET ID for DL RS reception) is found to be fully enabled and described in this provisional application, then it benefits from the November 1, 2018 priority date, shielding it from intervening prior art. Conversely, if a claim in US11641661B2 were to cover subject matter not sufficiently disclosed or enabled in 62/754,165, that specific claim would not be entitled to the provisional's priority date and could potentially be anticipated by any public disclosure (including other patents or publications) occurring between November 1, 2018, and the actual filing date of the unsupported subject matter.

2. U.S. Patent Application Ser. No. 16/660,726

   • Full Citation: U.S. patent application Ser. No. 16/660,726, which matured into US Patent 11057896B2.
   • Publication/Filing Date: Filed on October 22, 2019. It claims the benefit of priority to the provisional application 62/754,165 (November 1, 2018).
   • Brief Description: Titled "Methods and apparatuses of determining quasi co-location (QCL) assumptions for beam operations," this is the direct parent continuation application of US11641661B2. It elaborates on techniques for determining QCL assumptions in wireless communication systems, especially concerning beam operations in scenarios with multiple configured CORESETs.
   • Potential Anticipation under 35 U.S.C. § 102: Similar to the provisional application, as a direct parent, this application primarily serves to establish priority for the claims of US11641661B2. If the claims of US11641661B2 (such as Claims 1-16, which detail UE operations for monitoring CORESETs, receiving DCI, and applying QCL assumptions for DL RS or PDSCH reception based on specific CORESET IDs) are fully disclosed and enabled within 16/660,726, they would benefit from its effective filing date (which traces back to the 2018 provisional). If any specific claim in US11641661B2 contains new subject matter not supported by 16/660,726, then 16/660,726 could potentially act as prior art against that claim if it was published before the actual filing date of the new subject matter in US11641661B2. However, given the continuation relationship, substantial overlap and priority entitlement are expected.