DCT

5:26-cv-10691

Comcast Cable Communications LLC v. Adaptive Spectrum Signal Alignment Inc

Log In
Key Events
Complaint
complaint Intelligence

I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 5:26-cv-10691, N.D. Cal., 09/18/2026
  • Venue Allegations: Venue is alleged to be proper in the Northern District of California because Defendant ASSIA's principal place of business is located within the district and because a substantial part of the events, including the sending of demand letters, occurred there.
  • Core Dispute: Plaintiff Comcast seeks a declaratory judgment that its internet products and services do not infringe seven patents owned by Defendant ASSIA related to network performance optimization, remote diagnostics, and distributed wireless control.
  • Technical Context: The technology concerns the management, diagnosis, and optimization of telecommunication networks, including methods for remote performance analysis, dynamic configuration of home networking equipment like wireless mesh nodes, and joint optimization of wide area networks (WAN) and local area networks (LAN).
  • Key Procedural History: This declaratory judgment action was filed by Comcast following pre-suit communications in which ASSIA accused Comcast of infringing the patents-in-suit. The complaint notes that ASSIA has a history of litigating its patents against other major telecommunication companies, including recent now-settled litigation against Charter Communications and an ongoing case against AT&T. The complaint also references arguments ASSIA allegedly made in an inter partes review (IPR) proceeding involving Charter, where ASSIA distinguished a claimed "policy" from simple "commands or controls"—a distinction Comcast now leverages in its own non-infringement arguments.

Case Timeline

Date Event
2003-12-07 U.S. Patent No. 7,809,996 Priority Date
2010-10-05 U.S. Patent No. 7,809,996 Issue Date
2011-01-12 U.S. Patent No. 11,477,108 Priority Date
2011-11-10 U.S. Patent No. 10,848,398 Priority Date
2011-11-10 U.S. Patent No. 11,770,313 Priority Date
2012-07-13 U.S. Patent No. 11,050,654 Priority Date
2013-11-07 U.S. Patent No. 9,860,111 Priority Date
2018-01-02 U.S. Patent No. 9,860,111 Issue Date
2018-05-08 U.S. Patent No. 9,967,757 Issue Date
2020-11-24 U.S. Patent No. 10,848,398 Issue Date
2021-06-29 U.S. Patent No. 11,050,654 Issue Date
2022-10-18 U.S. Patent No. 11,477,108 Issue Date
2023-09-26 U.S. Patent No. 11,770,313 Issue Date
2024-01-19 ASSIA files complaint against AT&T
2024-02-21 ASSIA files complaint against Charter Communications
2025-02-19 ASSIA files Patent Owner Preliminary Response in IPRs against Charter
2026-07-07 ASSIA and Charter Communications file joint motion to stay litigation
2026-08-20 ASSIA sends demand letter to Comcast
2026-09-03 ASSIA's CEO emails Comcast's Chief Legal Officer
2026-09-08 ASSIA's CEO telephones Comcast's Chief Legal Officer
2026-09-10 ASSIA sends a proposed Nondisclosure Agreement to Comcast
2026-09-18 Complaint for Declaratory Judgment filed

II. Technology and Patent(s)-in-Suit Analysis

No probative visual evidence provided in complaint.

U.S. Patent No. 9,967,757 - "Systems, methods and apparatuses for implementing distributed wireless data sharing and control systems"

  • Patent Identification: U.S. Patent No. 9,967,757, titled "Systems, methods and apparatuses for implementing distributed wireless data sharing and control systems", issued May 8, 2018 Compl. ¶23

The Invention Explained

The complaint does not attach the patent, so analysis is based on the complaint's allegations regarding the claims.

  • Problem Addressed: Based on the complaint's allegations, the patent appears to address the challenge of optimizing performance in a distributed wireless network (such as a home mesh WiFi system) where multiple nodes operate in close proximity and can interfere with one another Compl. ¶39
  • The Patented Solution: The invention, as characterized by the infringement allegations, involves a distributed control system where wireless nodes communicate with each other Compl. ¶40 A first wireless node analyzes its own collected environmental measurements in combination with "state information" received from a second wireless node to determine how to modify its own configuration Compl. ¶39 This suggests a cooperative optimization method where nodes make decisions based on both local and neighboring data.
  • Technical Importance: This distributed approach allows a wireless network to self-optimize without a central controller, which is particularly relevant for consumer-grade mesh networking products where centralized management is often impractical.

Key Claims at a Glance

  • The complaint focuses on Claim 1 Compl. ¶39
  • Essential elements of Claim 1, as described in the complaint, include:
    • Analyzing collected measurements of the wireless environment at a first wireless node and state information received from a second wireless node.
    • Using this analysis to determine one or more modifications to the current configuration of the first wireless node.
    • Communicating first node state information to the second wireless node Compl. ¶¶39-40
  • Comcast denies infringement of "any claim of the '757 patent" but focuses its exemplary arguments on Claim 1 Compl. ¶39

U.S. Patent No. 9,860,111 - "Method and apparatus for diagnosing and configuring a broadband connection via an alternate communication path"

  • Patent Identification: U.S. Patent No. 9,860,111, titled "Method and apparatus for diagnosing and configuring a broadband connection via an alternate communication path", issued January 2, 2018 Compl. ¶25

The Invention Explained

The complaint does not attach the patent, so analysis is based on the complaint's allegations regarding the claims.

  • Problem Addressed: When a primary broadband connection fails or becomes unstable, it is often impossible for an Internet Service Provider (ISP) to remotely diagnose or reconfigure the customer premises equipment (CPE), as the management channel itself is unavailable Compl. ¶44
  • The Patented Solution: The patent describes using an "alternate communication path" (e.g., a cellular connection) to create a secondary channel between a remote network management device and an "alternate communications device" at the customer's location. This allows the management device to send new diagnostic or configuration information "for use at the broadband CPE" to fix a fault or improve performance, bypassing the faulty primary connection Compl. ¶44
  • Technical Importance: This technology provides a resilient, out-of-band management capability, enabling ISPs to remotely troubleshoot and repair customer equipment even when the primary internet connection is down, potentially reducing service disruptions and costly technician visits.

Key Claims at a Glance

  • The complaint focuses on Claim 1 Compl. ¶44
  • An essential element of Claim 1, as described in the complaint, includes:
    • An alternate communications device receiving, via an alternate communication path, new diagnostic or configuration information from a broadband network management device for use at the broadband CPE to fix a fault or improve performance of the primary broadband connection Compl. ¶44
  • Comcast denies infringement of "any claim of the '111 patent" but focuses its exemplary arguments on Claim 1 Compl. ¶44

U.S. Patent No. 10,848,398 - "Method, apparatus, and system for optimizing performance of a communication unit by a remote server"

  • Patent Identification: U.S. Patent No. 10,848,398, titled “Method, apparatus, and system for optimizing performance of a communication unit by a remote server,” issued November 24, 2020 Compl. ¶27
  • Technology Synopsis: The patent addresses the limitations of static, on-device adaptation algorithms in communication systems ’398 Patent, col. 1:1-20 The solution involves a remote server that collects data from one or more communication units, generates an optimized "policy" based on this data, and sends the policy to the units, which then implement it to adapt to time-varying conditions ’398 Patent, abstract
  • Asserted Claims: Claim 1 is the focus of the non-infringement argument Compl. ¶48
  • Accused Features: Comcast’s home internet products are accused, with Comcast arguing they do not "communicate a 'policy' 'based on processed data' to equipment" that would enable decision-making at the local device Compl. ¶48

U.S. Patent No. 11,770,313 - "Method, apparatus, and system for optimizing performance of a communication unit by a remote server"

  • Patent Identification: U.S. Patent No. 11,770,313, titled “Method, apparatus, and system for optimizing performance of a communication unit by a remote server,” issued September 26, 2023 Compl. ¶29
  • Technology Synopsis: As a continuation of the '398 patent family, this patent addresses the same problem of suboptimal performance from static adaptation algorithms ’313 Patent, col. 1:21-23 It discloses a similar solution where a remote server analyzes collected data to generate and distribute a "policy" to communication units for dynamic performance optimization ’313 Patent, abstract
  • Asserted Claims: Claim 1 is the focus of the non-infringement argument Compl. ¶52
  • Accused Features: Comcast’s home internet products are accused, with Comcast again arguing that they do not communicate a "policy" to equipment within a subscriber's network Compl. ¶52

U.S. Patent No. 11,050,654 - "Method and system for using a downloadable agent for a communication system, device, or link"

  • Patent Identification: U.S. Patent No. 11,050,654, titled “Method and system for using a downloadable agent for a communication system, device, or link,” issued June 29, 2021 Compl. ¶31
  • Technology Synopsis: The patent addresses the difficulty for a remote, cloud-based server in obtaining performance data from within a subscriber's private Local Area Network (LAN) ’654 Patent, col. 1:25-34 The invention is a "downloadable agent" that executes on a device within the LAN to collect WAN and/or LAN performance information and transmit it to a remote machine for analysis ’654 Patent, abstract
  • Asserted Claims: Claim 1 is the focus of the non-infringement argument Compl. ¶56
  • Accused Features: Comcast’s Xfinity mobile app is accused, with Comcast arguing it does not collect "WAN performance information" or send an "on-demand change request associated with at least one of throughput, or latency" as claimed Compl. ¶56

U.S. Patent No. 11,477,108 - "Systems and methods for jointly optimizing WAN and LAN network communications"

  • Patent Identification: U.S. Patent No. 11,477,108, titled “Systems and methods for jointly optimizing WAN and LAN network communications,” issued October 18, 2022 Compl. ¶33
  • Technology Synopsis: The patent addresses the problem of WANs and LANs being managed as separate, distinct networks, which can lead to suboptimal performance ’108 Patent, col. 2:3-13 The invention provides for a management device that jointly analyzes information from both the WAN and LAN to diagnose faults or identify operational conditions, enabling joint optimization across the two network domains ’108 Patent, abstract
  • Asserted Claims: Claim 1 is the focus of the non-infringement argument Compl. ¶61
  • Accused Features: Comcast's home internet products are accused, with Comcast arguing they do not identify WAN operational conditions by analyzing collected LAN information as claimed Compl. ¶61

U.S. Patent No. 7,809,996 - "Adaptive FEC Codeword Management"

  • Patent Identification: U.S. Patent No. 7,809,996, titled “Adaptive FEC Codeword Management,” issued October 5, 2010 Compl. ¶35
  • Technology Synopsis: The patent addresses the trade-off between latency and error correction in systems using Forward Error Correction (FEC), where fixed settings are often suboptimal ’996 Patent, col. 2:49-50 The solution is a controller that monitors transmission error values and, in response, generates a "retransmission overhead control signal" to adaptively adjust the composition of the FEC codeword (e.g., the ratio of payload to parity data) to dynamically balance error protection with low latency ’996 Patent, abstract
  • Asserted Claims: Claim 20 is the focus of the non-infringement argument Compl. ¶65
  • Accused Features: Comcast's Xfinity cable products are accused, with Comcast arguing they do not generate a "retransmission overhead control signal in response to measured transmission error values" as claimed Compl. ¶65

III. The Accused Instrumentality

Product Identification

The complaint identifies a broad category of accused products and services offered by Comcast Compl. ¶8 These include, but are not limited to, “Xfinity cable products which use DOCSIS 3.1,” “home internet products which perform remote monitoring and troubleshooting,” products utilizing “home wireless mesh,” products performing “cloud based remote management,” and the “Xfinity mobile app” Compl. ¶8

Functionality and Market Context

The accused instrumentalities represent core components of Comcast's residential and business internet service offerings Compl. ¶3 They provide internet connectivity and in-home networking (e.g., via DOCSIS cable modems and mesh WiFi systems) and include customer-facing tools (like the Xfinity mobile app) and back-end systems for remote management, diagnostics, and performance optimization Compl. ¶8 Given Comcast's position as a leading U.S. provider of these services, the commercial footprint of the accused instrumentalities is substantial Compl. ¶3

IV. Analysis of Infringement Allegations

The complaint is for declaratory judgment of non-infringement. The following tables summarize Comcast's (Plaintiff's) arguments for why its products do not meet specific claim limitations.

U.S. Patent No. 9,967,757 Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Non-Infringing Functionality Complaint Citation Patent Citation
analyzing the collected measurements of the wireless environment at the first wireless node and the state information received from the second wireless node to determine one or more modifications to the current configuration of the first wireless node Comcast alleges that in its home wireless mesh products, "no wireless node implements an algorithm or other process to analyze both locally collected wireless-environment measurements and state information received from another wireless node to determine modifications to its current configuration." ¶39 Not Provided
communicating first node state information to the second wireless node Comcast alleges its accused products "do not share any state information between wireless nodes." ¶40 Not Provided

Identified Points of Contention

  • Technical Question: The central dispute appears to be factual and technical: What is the true operational nature of Comcast's wireless mesh nodes? The case may depend on evidence produced during discovery that shows whether the nodes do or do not exchange "state information" and "analyze" it in the manner required by the claim.
  • Scope Question: A secondary issue may be the scope of the terms "analyzing" and "state information." The court may need to determine what level of processing constitutes "analyzing" and what type of data exchange qualifies as "state information" in the context of the patent.

U.S. Patent No. 9,860,111 Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Non-Infringing Functionality Complaint Citation Patent Citation
the alternate communications device to receive from the broadband communication network management device, via the alternate communication path, new diagnostic information for use at the broadband CPE to fix a fault or improve performance of the broadband connection or new configuration information about the broadband connection Comcast alleges its products "do not use any received diagnostic information at a broadband CPE to fix a fault or improve a primary broadband connection" and "do not receive any new configuration information at the broadband CPE for changing the primary broadband connection." ¶44 Not Provided

Identified Points of Contention

  • Technical Question: The dispute centers on the location of the remedial action. The claim requires the received information to be for use at the broadband CPE. Comcast’s argument suggests that any remote fix or reconfiguration occurs elsewhere in the system, not at the CPE itself using information received over the alternate path. This raises a technical question about the architecture of Comcast's remote troubleshooting and management systems.
  • Scope Question: The court may need to construe the phrase "for use at the broadband CPE," which could determine whether the claim covers systems where the "fix" is executed by a device other than the CPE, even if it affects the CPE's operation.

V. Key Claim Terms for Construction

  • The Term: "policy" (from claims of the '398 and '313 patents)
  • Context and Importance: The definition of "policy" appears to be a dispositive issue for the '398 and '313 patents. Comcast explicitly argues its systems do not receive a "policy" Compl. ¶48 Compl. ¶52 Crucially, Comcast cites a prior IPR proceeding where ASSIA allegedly distinguished its claimed "policy" from mere "commands or 'controls'," arguing that a policy "enables the AP to use rules and conditions to make decisions and take actions" Compl. ¶48 This prior argument from the patent owner may be used by Comcast to advocate for a narrower construction of the term.
  • Intrinsic Evidence for Interpretation:
    • Evidence for a Broader Interpretation: The abstract of the '398 patent describes "generating a policy... based on the collected data; and sending the policy... wherein the policy comprises conditions for operation" ’398 Patent, abstract This language could be argued to encompass any set of operational parameters or configuration data sent to a device.
    • Evidence for a Narrower Interpretation: The detailed description states the remote server provides "rules and conditions" so the communication unit can "select and use the most desired adaptation algorithm to use" ’398 Patent, col. 4:61-65 This supports the interpretation that a "policy" is more than just data or a direct command; it is a set of rules that facilitates autonomous, on-device decision-making, which aligns with the position ASSIA allegedly took in the IPR.

VI. Other Allegations

  • Indirect Infringement: As this is a declaratory judgment action brought by the accused infringer, the complaint's primary goal is to deny all liability. Comcast requests a declaration that it has not infringed "directly, contributorily, or by inducement" Compl., Prayer for Relief ¶1 The complaint does not plead specific facts concerning knowledge or intent, as its posture is one of denial rather than allegation.
  • Willful Infringement: Willfulness is not an allegation made by Comcast. However, the complaint establishes that ASSIA provided Comcast with notice of the alleged infringement in a letter dated August 20, 2026 Compl. ¶9 This pre-suit notice could form the basis for a counterclaim of willful infringement by ASSIA, should it choose to assert one, based on Comcast's conduct after receiving the letter.

VII. Analyst’s Conclusion: Key Questions for the Case

  • A central issue for at least two of the patents will be one of definitional scope and potential estoppel: Can the term "policy" be broadly construed to cover the configuration data used in Comcast's systems, or will ASSIA be held to a narrower definition, allegedly advanced during a prior IPR, that requires the transmission of rules enabling autonomous, on-device decision-making?
  • A key evidentiary question for the remaining patents will be one of technical and operational fact: Does discovery reveal that Comcast's accused systems—including its mesh network nodes, mobile applications, and remote management platforms—actually perform the specific, multi-step functions recited in the claims, such as the cooperative analysis of shared data between nodes or the execution of diagnostic fixes directly at the customer's equipment?
  • The case also presents a question of infringement locus: For claims involving remote diagnostics and repair, does infringement require the "fix" to be executed at the CPE, as Comcast argues, or can the claim be read to cover a system-wide architecture where the fix is implemented elsewhere but resolves a problem with the CPE's connection?