Obviousness

Obviousness Analysis under 35 U.S.C. § 103 for US Patent 11,950,105

This analysis identifies combinations of prior art references that would render the claims of US Patent 11,950,105 obvious to a person having ordinary skill in the art (PHOSITA) as of the patent's priority date (October 30, 2013). The PHOSITA in this field would be a wireless network engineer or a software engineer with expertise in networking protocols (MAC/PHY layers) and wireless communication systems, understanding concepts such as bandwidth allocation, multi-radio systems, and network virtualization.

Independent Claim 1 Summary:

Claim 1 describes a method for improving wireless networking device performance by:

• Connecting an application interface (with a bandwidth requirement) and first and second actual MAC/PHY interfaces (associated with first and second transceivers operating in different frequency bands) to a processing interface.
• Forming virtual MAC and virtual PHY interfaces within the processing interface, where virtual PHY provides feedback on transceiver bandwidth availability to the virtual MAC.
• The processing interface, transparently to higher layers, associates a recipient with both actual MAC/PHY interfaces.
• It identifies and evaluates portions of a transceiver's bandwidth, and uses available frequencies within that portion to transmit data, without requiring recipient disassociation from the actual MAC/PHY interfaces.
• Crucially, this utilization does not prevent other devices from simultaneously using the remaining bandwidth of that transceiver.

Prior Art Combination and Rationale:

A strong argument for obviousness can be made by combining US20090034460A1 to Moratt (hereinafter "Moratt") with US20060114851A1 to STMicroelectronics Asia Pacific Pte. Ltd. (hereinafter "STMicroelectronics"), supplemented by general knowledge in the field.

1. Primary Reference: US20090034460A1 (Moratt) - "Dynamic bandwidth allocation for multiple virtual MACs"

• Inferred Teachings from Title: Moratt teaches a system where a virtual Media Access Control (MAC) layer is dynamically created to manage and coordinate multiple underlying physical radios. This virtualization allows for dynamic bandwidth allocation based on application requirements.
• Mapping to Claim 1 Elements:
  • Preamble (improving performance): Directly addressed by "dynamic bandwidth allocation."
  • A (Application/Processing Interface Connection): Moratt's dynamic bandwidth allocation "based on application requirements" implies an application interface feeding requirements to a processing interface responsible for allocation.
  • B (Actual MAC/PHY Connections): The concept of "multiple virtual MACs" managing underlying resources necessarily implies multiple actual MAC/PHY interfaces connected to the processing layer that forms the virtual MAC.
  • D (Virtual MAC Formation & Feedback): Explicitly teaches "multiple virtual MACs" and "dynamic bandwidth allocation," which inherently requires feedback regarding resource availability for effective allocation.
  • E (Processing Interface Configuration - transparent, identify portion, evaluate, transmit, no disassociation): Dynamic bandwidth allocation involves identifying available bandwidth portions, evaluating their status, and using them for transmission. The "transparent" nature and "without requiring disassociation" are inherent benefits and design goals of a virtualized MAC layer, which aims to abstract the underlying physical complexities from higher layers and end devices, ensuring seamless connectivity.

2. Secondary Reference: US20060114851A1 (STMicroelectronics) - "Method and apparatus for multi-channel MAC protocol using multi-tone synchronous collision resolution"

• Inferred Teachings from Title: STMicroelectronics teaches a multi-channel MAC protocol that utilizes "multi-tone" operation. This implies the ability to operate across different frequency bands or distinct sub-channels within a given band. Such a system inherently supports simultaneous use of different frequency portions.
• Mapping to Claim 1 Elements:
  • C (Transceiver Characteristics - different frequency bands): The "multi-channel MAC protocol using multi-tone" explicitly teaches the use of different frequencies or channels. It would be obvious to a PHOSITA that these channels would be implemented by transceivers capable of emitting radio waves in these different bands.
  • F (Simultaneous Utilization): A "multi-channel MAC protocol" by definition allows for simultaneous utilization of different frequency channels, where using one portion does not prevent others from using remaining portions.

3. Motivation for a Person Having Ordinary Skill in the Art (PHOSITA) to Combine:

As of October 30, 2013, the wireless networking landscape was characterized by:

• An "insatiable demand for more bandwidth," particularly for multimedia content (US11950105, Background).
• The prevalence of multi-radio and multi-band wireless devices (e.g., dual-band Wi-Fi supporting 2.4 GHz and 5 GHz, consistent with IEEE 802.11 standards, as mentioned in the specification).
• A general trend towards network virtualization to abstract physical resources and simplify management.

A PHOSITA, aiming to improve wireless network performance and meet high bandwidth demands, would have been motivated to combine Moratt and STMicroelectronics for the following reasons:

• Efficient Resource Aggregation and Management: Moratt provides a robust framework (virtual MAC) for dynamically managing and allocating bandwidth from multiple underlying physical radios. STMicroelectronics demonstrates how these radios can effectively operate across different, simultaneous frequency channels. Combining these would allow for the virtual MAC to control and aggregate bandwidth from multiple transceivers operating in different frequency bands, thus maximizing the available wireless resources for demanding applications.
• Enhanced Bandwidth and Performance: By pooling resources from different frequency bands under a unified virtual MAC, the combined system would significantly increase the effective bandwidth available to applications. This directly addresses the stated problem in US11950105's background regarding inadequate resources for high-bandwidth content.
• Seamless User Experience: The transparency of Moratt's virtualized approach, coupled with dynamic allocation across multiple frequencies (as enabled by STMicroelectronics), would allow for seamless data transmission to a recipient without requiring disruptive disassociations, even as underlying physical resources are reconfigured. This is a recognized advantage of well-designed virtualization layers.
• Logical Extension of Virtualization to the PHY Layer: While Moratt's title specifically mentions "virtual MACs," a PHOSITA would recognize that for a virtual MAC to manage multiple physical radios, there must be a corresponding abstraction or virtualization of the Physical (PHY) layer. The description of US11950105 itself illustrates this logical step, stating that an "RF block" can form a "virtual PHY layer" that feeds resource availability back to the virtual MAC. This would be a straightforward design choice for a PHOSITA implementing Moratt's system with multi-frequency radios as suggested by STMicroelectronics.

Conclusion:

Given the teachings of Moratt regarding dynamic bandwidth allocation via virtual MACs managing multiple physical radios, and the teachings of STMicroelectronics regarding multi-channel MAC protocols operating across different frequency tones/bands, a PHOSITA would have been motivated to combine these references. The combination would result in a system that dynamically allocates bandwidth from multiple transceivers operating in different frequency bands using virtual MAC and (implicitly or explicitly) virtual PHY layers, operating transparently to higher layers and enabling seamless, simultaneous utilization of bandwidth portions, thereby rendering Claim 1 of US Patent 11,950,105 obvious.