Signal Point Networks LLC v. Samsung Electronics Co Ltd

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Signal Point Networks, LLC (Texas)
  • Defendant: Samsung Electronics Co., Ltd. (Republic of Korea) and Samsung Electronics America, Inc. (New York)
  • Plaintiff's Counsel: Boies Schiller Flexner LLP; Miller Fair Henry PLLC
• Case Identification: 2:26-cv-00502, E.D. Tex., 06/24/2026
• Venue Allegations: Venue is alleged against Samsung Electronics America, Inc. based on its having a "regular and established place of business" in the district, specifically a facility in Plano, Texas, where it allegedly commits acts of infringement. Venue against the foreign parent, Samsung Electronics Co., Ltd., is asserted on the basis that suits against foreign entities are proper in any U.S. judicial district.
• Core Dispute: Plaintiff alleges that Defendant's mobile devices and related services infringe four patents related to wireless communications, proximity-based device configuration, on-device network diagnostics, and quality-of-service provisioning.
• Technical Context: The lawsuit concerns foundational technologies for modern mobile devices, including methods for improving wireless connectivity, security, diagnostics, and performance in response to the market's demand for seamless mobility and reliability.
• Key Procedural History: The complaint alleges that prior to filing, Plaintiff engaged in licensing discussions with Samsung via correspondence on June 12, 2026, and June 19, 2026, which identified the asserted patents and accused products. The complaint also references other patent cases in the district where Samsung has previously admitted to venue.

Case Timeline

Date	Event
2004-01-26	Priority Date for U.S. Patent No. 7,836,189
2004-07-30	Priority Date for U.S. Patent No. 7,684,333
2007-09-28	Priority Date for U.S. Patent No. 7,890,743
2010-03-23	U.S. Patent No. 7,684,333 Issued
2010-11-16	U.S. Patent No. 7,836,189 Issued
2011-02-15	U.S. Patent No. 7,890,743 Issued
2013-07-30	Priority Date for U.S. Patent No. 9,634,911
2017-04-25	U.S. Patent No. 9,634,911 Issued
2019	Samsung demonstrates EN-DC on Galaxy S10 5G
2021	Samsung demonstrates EN-DC on Galaxy S20+
2025-02-03	Alleged release date for accused Samsung Galaxy S25
2026-06-12	Plaintiff sends correspondence to Samsung regarding patents
2026-06-19	Plaintiff sends additional correspondence to Samsung
2026-06-24	Complaint Filed

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

U.S. Patent No. 7,836,189 - "Multiple Simultaneous Wireless Connections in a Wireless Local Area Network"

The Invention Explained

• Problem Addressed: The patent's background section describes that conventional wireless standards required a mobile device to associate with only one access point at a time, leading to slow handoffs (in excess of 100 milliseconds) that disrupted real-time applications like voice and video when a user moved (Compl. ¶33, citing '189 Patent, col. 1:59-2:5).
• The Patented Solution: The invention proposes a method where a wireless client simultaneously associates with multiple wireless access points Compl. ¶34 After establishing a primary connection, the client forms additional associations with other nearby access points and notifies all associated points of each other's identities Compl. ¶34 The access points then exchange state, flow, and session information in advance of any handoff, for example using an extension to the Inter-Access Point Protocol (IAPP), enabling faster and more seamless transitions (Compl. ¶34, citing '189 Patent, col. 5:60-6:50). This architecture also allows for link aggregation, where multiple access points can simultaneously transmit data to a single client to increase throughput (Compl. ¶35, citing '189 Patent, col. 9:30-43).
• Technical Importance: This approach provided a foundation for fast, seamless mobility and multi-connection wireless services that are critical to the performance of modern mobile devices Compl. ¶35

Key Claims at a Glance

• The complaint asserts at least independent claim 1 Compl. ¶63
• Claim 1 requires:
  • Obtaining a first primary active affiliation with a first primary wireless access point in a first wireless local area network.
  • Obtaining a second primary active affiliation with a second primary wireless access point in the same network.
  • Simultaneously maintaining and using both affiliations when not in a handoff process.
  • The first and second wireless access points must both be part of the first wireless local area network.
• The complaint reserves the right to assert additional claims Compl. p. 48

U.S. Patent No. 7,890,743 - "Method and Apparatus for Configuring a Device Based on Proximity to Another Device"

The Invention Explained

• Problem Addressed: The patent identifies that as portable devices become smaller and more valuable, they become easier to steal or lose, while traditional security measures like physical locks are inconvenient and passwords can be compromised (Compl. ¶36, citing '743 Patent, col. 1:12-40).
• The Patented Solution: The invention describes a user device that stores a "proximity rulebase" containing rules that automatically configure the device's behavior based on its proximity to one or more other "enabling devices" (e.g., an owner's phone, a WiFi router) (Compl. ¶37, citing '743 Patent, abstract; '743 Patent, col. 3:13-4:62). The rules can control a wide range of parameters, such as whether the device operates at all, access controls, parental controls, or quiet modes (Compl. ¶38, citing '743 Patent, col. 1:58-2:5). The patent describes use cases such as a laptop that only functions when near its owner's phone or a child's device that enables parental controls when near a parent's phone Compl. ¶38
• Technical Importance: The technology anticipated context-aware security features now common in mobile devices, such as proximity-based unlocking, geofencing, and trusted-device configurations Compl. ¶38

Key Claims at a Glance

• The complaint asserts at least independent claim 1 Compl. ¶79
• Claim 1 requires:
  • Establishing a configuration rule in a user device that controls a parameter based on required proximity to a first enabling device.
  • The enabling device must be a general-purpose device, and establishing the rule must require no further activation.
  • Determining if the rule is satisfied.
  • If satisfied, configuring the user device according to the parameter.
  • If not satisfied, disabling the configuration parameter.
• The complaint reserves the right to assert additional claims Compl. p. 48

Multi-Patent Capsule: U.S. Patent No. 9,634,911

• Patent Identification: U.S. Patent No. 9,634,911, "Communication Device Event Captures," issued April 25, 2017 Compl. ¶23
• Technology Synopsis: The patent addresses the difficulty of diagnosing network issues using packet traces alone (Compl. ¶39, citing '911 Patent, col. 1:10-30). The invention solves this by capturing and timestamping device-level events, such as user interactions or timer expirations, and storing them in the same log file as timestamped network packets, providing a unified, chronological view of all relevant activity (Compl. ¶40, citing '911 Patent, abstract).
• Asserted Claims: At least Claim 1 Compl. ¶97
• Accused Features: The pre-installed Samsung Members application on Galaxy devices, which is alleged to detect, timestamp, and store user interactions and timer events in a device-resident bug-report file that also contains timestamped network packet data Compl. ¶52 Compl. ¶¶99-103

Multi-Patent Capsule: U.S. Patent No. 7,684,333

• Patent Identification: U.S. Patent No. 7,684,333, "Reliable Quality of Service (QoS) Provisioning Using Adaptive Class-Based Contention Periods," issued March 23, 2010 Compl. ¶24
• Technology Synopsis: The patent addresses the issue of high-priority traffic (e.g., voice) starving low-priority traffic (e.g., data) in congested wireless networks (Compl. ¶42, citing '333 Patent, col. 1:55-2:14). The solution involves partitioning the wireless channel into "contention periods," associating traffic flows with access categories (e.g., voice, video, best-effort), and assigning only a "proper subset" of those categories to each period, thereby guaranteeing every traffic class gets some access to the channel (Compl. ¶43, citing '333 Patent, abstract; '333 Patent, col. 3:27-4:8).
• Asserted Claims: At least Claim 1 Compl. ¶114
• Accused Features: Samsung Galaxy devices that support Wi-Fi 7 (IEEE 802.11be) and implement Enhanced Distributed Channel Access (EDCA) along with Restricted Target Wake Time (r-TWT) scheduling, which allegedly allocates channel bandwidth in a manner that practices the claimed method Compl. ¶53 Compl. ¶¶116-120

III. The Accused Instrumentality

Product Identification

• The accused instrumentalities are various Samsung Galaxy-branded smartphones and tablets, along with the software and features operating on them Compl. ¶49 Specific product lines are accused for each patent, including the Galaxy S, A, Z Fold, and Z Flip series Compl. ¶¶50-53

Functionality and Market Context

The complaint targets four distinct functionalities that are alleged to be central to modern smartphone operation:

• E-UTRA-NR Dual Connectivity (EN-DC): A 5G feature where a device maintains simultaneous connections to both LTE and 5G NR networks to aggregate bandwidth and improve performance Compl. ¶27 The complaint references a screenshot of specifications for a future "Samsung Galaxy S25" listing support for "SA/NSA/Sub6/mmWave" as evidence of this capability Compl. p. 22
• Extend Unlock (formerly Smart Lock): A security feature that automatically keeps a phone unlocked when it is in proximity to a registered "trusted device," such as a smartwatch or Bluetooth earbuds, and locks it when the connection is lost Compl. ¶28 Compl. ¶81 A screenshot provided in the complaint shows the user interface for adding trusted devices Compl. p. 29 Another shows the lock screen message "Phone unlocked by Extend Unlock" Compl. p. 29
• Samsung Members Diagnostics: A pre-installed application used for on-device diagnostics, allowing users to generate and send bug reports that include system logs with device events and network traffic information Compl. ¶29 Compl. ¶52 The complaint includes a screenshot of the "Error reports" screen, which shows a checkbox to "Send system log data" Compl. p. 36
• Wi-Fi 7 QoS Provisioning: Features in Wi-Fi 7 devices, including the use of Restricted Target Wake Time (r-TWT) scheduling, which allocates channel bandwidth among different classes of traffic to support low-latency applications Compl. ¶30 Compl. ¶53

IV. Analysis of Infringement Allegations

U.S. Patent No. 7,836,189 Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A method of forming multiple simultaneous active wireless connections between a wireless client and two or more separate wireless access points, comprising: obtaining, by the wireless client, a first primary active affiliation between the wireless client and a first primary wireless access point in a first wireless local area network...	The accused Galaxy device (wireless client) completes a 3GPP RRC connection establishment procedure with an LTE eNB Master Node (first primary wireless access point) in the operator's E-UTRAN network (first wireless local area network).	¶66	col. 6:32-33
obtaining, by the wireless client, a second primary active affiliation between the wireless client and a second primary wireless access point in the first wireless local area network...	While connected to the LTE eNB, the device completes an EN-DC Secondary Node Addition procedure with an NR gNB Secondary Node (second primary wireless access point) in the same operator network.	¶67	col. 6:34-36
simultaneously maintaining and using, by the wireless client, the first primary active affiliation... and the second primary active affiliation... during a period of operation of the wireless client when the wireless client is not engaging in a handoff process...	During steady-state EN-DC operation, the device allegedly maintains and uses both the LTE and NR connections concurrently to transmit and receive live user-plane traffic, which is described as a sustained operating mode rather than a transient handover. The complaint includes a screenshot of a Samsung video explaining that EN-DC "combines the 4G and 5G connections" for a single device Compl. p. 24	¶68	col. 5:9-12
wherein the first primary wireless access point and the second primary wireless access point are both part of the first wireless local area network.	The LTE eNB Master Node and the NR gNB Secondary Node are both alleged to be deployed within the same operator's network, sharing a common Evolved Packet Core and a single network-operator identity (PLMN).	¶69	col. 5:29-33

• Identified Points of Contention:
  • Scope Question: A principal issue may be whether the terms "wireless access point" and "wireless local area network," which in the patent's context appear to refer to Wi-Fi (802.11) components, can be construed to read on the accused cellular network components (e.g., LTE eNB, NR gNB) and the operator's E-UTRAN.
  • Technical Question: The claim requires two "primary active" affiliations. The accused EN-DC architecture uses the terms "Master Node" and "Secondary Node" Compl. ¶66 The court may need to determine if an affiliation with a "Secondary Node" qualifies as a "primary" affiliation as that term is used in the patent, or if it implies a subordinate status that falls outside the claim's scope.

U.S. Patent No. 7,890,743 Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
establishing, in the user device, a configuration rule for the user device, wherein the configuration rule... is based at least in part on a required proximity between the user device and at least a first enabling device;	A user registers a "trusted device" (e.g., a Galaxy Watch, Bluetooth earbuds) in the "Extend Unlock" settings. This establishes a rule that controls the lock-screen state based on Bluetooth proximity to the trusted device.	¶82	col. 1:46-54
wherein at least the first enabling device is a general-purpose device, and wherein establishing the configuration rule in the device requires no further activation;	The trusted device (e.g., Galaxy Watch) is alleged to be a general-purpose device because its primary functions (fitness tracking, audio) are unrelated to unlocking the phone. Once registered, the rule allegedly operates automatically without further user input or activation.	¶83	col. 3:20-30
determining whether the configuration rule is satisfied;	The accused device continuously monitors for the Bluetooth signal of the registered trusted device to determine if it is within proximity (rule satisfied) or not (rule not satisfied).	¶84	col. 3:25-27
when the configuration rule is satisfied, configuring the user device according to the configuration parameter...	When the trusted device is in Bluetooth proximity, the accused product modifies its lock-screen state to remain unlocked, displaying a "Phone unlocked by Extend Unlock" message.	¶85	col. 3:27-30
when the configuration rule is not satisfied, disabling the configuration parameter.	When the trusted device leaves Bluetooth proximity or disconnects, the accused product disables the unlocked state and reverts to its standard lock screen, requiring a PIN, password, or pattern.	¶86	col. 6:49-51

• Identified Points of Contention:
  • Scope Question: The construction of "general-purpose device" will be critical. The court will need to decide whether a device like a smartwatch, when used as a key for unlocking a phone, is functioning as a "general-purpose device" (as Plaintiff alleges, based on its other capabilities) or as a special-purpose security token that would fall outside the claim.
  • Technical Question: The meaning of "requires no further activation" may be disputed. Plaintiff alleges this is met because the feature works automatically after initial setup Compl. ¶83 A defendant might argue that the initial user setup itself constitutes an "activation" not contemplated by the patent.

V. Key Claim Terms for Construction

From the '189 Patent:

• The Term: "wireless local area network"
• Context and Importance: This term is central because the patent repeatedly refers to WLANs, a term of art typically associated with Wi-Fi (IEEE 802.11) technologies. However, the infringement allegations are directed at a cellular technology (5G EN-DC). The viability of the infringement case for the '189 Patent may depend on whether a cellular operator's radio access network can be considered a "wireless local area network."
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: A plaintiff may argue that the term is used as an example and that the inventive concept of managing multiple simultaneous connections is not limited to any specific wireless standard. The patent's focus is on solving a handoff problem common to many types of mobile wireless systems.
  • Evidence for a Narrower Interpretation: The specification's alleged reference to the Inter-Access Point Protocol (IAPP) Compl. ¶34, which is part of the IEEE 802.11 standard family, could be used to argue that the inventors specifically contemplated and described their invention within the context of 802.11 WLANs, thereby limiting the claim scope to that environment.

From the '743 Patent:

• The Term: "general-purpose device"
• Context and Importance: Claim 1 requires the "enabling device" to be a "general-purpose device." The infringement theory relies on devices like smartwatches and Bluetooth earbuds meeting this definition Compl. ¶83 Practitioners may focus on this term because if these items are construed as special-purpose security devices in the context of the invention, the infringement allegation could fail.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The complaint argues that a device is "general-purpose" if its primary functions are unrelated to the enabling action Compl. ¶83 The specification's examples of enabling devices, such as a "cell phone or PDA" '743 Patent, fig. 2A, are themselves multi-function, general-purpose devices, which may support this interpretation.
  • Evidence for a Narrower Interpretation: The background of the patent contrasts the invention with conventional physical keys and passwords used for access control '743 Patent, col. 1:12-40 A defendant may argue that in the context of the claim, any device used as the "key" to enable the protected device is serving a special security purpose, regardless of its other capabilities.

VI. Other Allegations

• Indirect Infringement: For all four patents, the complaint alleges induced infringement. The allegations are based on Samsung's affirmative acts of providing the accused products and instructing customers on how to use the infringing features through user guides, support websites, marketing materials, and online videos Compl. ¶¶71 Compl. ¶89 Compl. ¶106 Compl. ¶123 The complaint provides example URLs for Samsung's support and marketing pages (Compl. ¶71; Compl. ¶89).
• Willful Infringement: Willfulness is alleged based on both pre-suit and post-suit knowledge. The complaint alleges pre-suit knowledge based on Samsung's sophistication as a market participant that monitors the patent landscape and, more specifically, on correspondence sent to Samsung on June 12 and 19, 2026, which allegedly provided express notice of the patents and infringement Compl. ¶¶54-55 Willful blindness is pleaded in the alternative Compl. ¶57 Continued infringement after the filing of the complaint is alleged as further evidence of willfulness Compl. ¶58

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

1. Definitional Scope (Cellular vs. WLAN): A core issue for the '189 Patent will be whether the claim terms "wireless access point" and "wireless local area network," rooted in the patent's Wi-Fi-centric disclosure, can be construed broadly enough to encompass the cellular base stations (eNB/gNB) and operator network of the accused 5G EN-DC functionality.

2. Definitional Scope (General vs. Special Purpose): For the '743 Patent, a central question will be the interpretation of "general-purpose device." The case may turn on whether a device like a smartwatch, when used to unlock a phone, is considered "general-purpose" due to its other functions, or if its role as an authentication token renders it a special-purpose device outside the scope of the claim.

3. Technical Equivalence and Evolution: For the '333 and '911 patents, a key question will be one of technical mapping between the patented inventions and the modern, standardized technologies in the accused products. The court will need to determine whether the accused Wi-Fi 7 r-TWT feature ('333 patent) and the Samsung Members diagnostic logging ('911 patent) operate in a manner that corresponds to the specific steps and structures laid out in the claims, or if evolution in technology standards has created a functional divergence.