Obviousness

US Patent 12250564B2, with a priority date of October 30, 2013, claims a wireless networking device that dynamically allocates bandwidth across multiple transceivers, potentially in different frequency bands, using virtual Media Access Control (MAC) and Physical (PHY) layers. The core of the invention, as defined by independent Claim 1, involves a processing interface that evaluates application bandwidth requirements and transceiver availabilities, then allocates portions of bandwidth from one or more transceivers to satisfy these requirements, transparently to higher network layers, and without preventing other devices from using remaining bandwidth portions simultaneously.

An analysis under 35 U.S.C. § 103 indicates that Claim 1 of US12250564B2 would have been obvious to a person having ordinary skill in the art (PHOSITA) by combining the teachings of US20090034460A1 (Moratt) and US20090141691A1 (Jain).

Primary Reference: US20090034460A1 (Moratt)

Moratt discloses a "Dynamic bandwidth allocation for multiple virtual MACs" system.

• Wireless networking device: Moratt describes a "wireless communication system" capable of supporting multiple virtual MACs.
• Processing interface, application interface, data streams, and bandwidth requirements: Moratt's system assigns "independent quality of service (QoS) for various data flows". This inherently implies an application layer generating data streams with bandwidth requirements, which are managed by a processing layer.
• Actual MAC and PHY interfaces and wireless transceivers: Moratt states that "a MAC controller may be shared between a plurality of virtual MACs" and "a single MAC controller may be utilized to control multiple PHYs, or multiple MACs" that "communicate with one or more physical devices". This establishes the concept of a processing interface controlling actual MAC and PHY layers associated with physical transceivers.
• Virtual MAC interface and resource monitoring: Moratt explicitly discloses "multiple virtual MACs" for dynamic bandwidth allocation, which necessitates monitoring of resources and their availability.
• Dynamic allocation logic: Moratt's core teaching of "dynamically allocating bandwidth for data transmissions and receptions by a given virtual MAC" covers the broad functionality of steps (a) through (e) of Claim 1, including identifying resources, evaluating characteristics, and allocating them. The "transparent to any layer... above" is a known benefit of virtualization. The concept of "without requiring disassociation" is also inherent in a virtualized MAC layer, where the client maintains a stable connection to the virtual entity while underlying physical resources are managed dynamically.

While Moratt provides a strong foundation, it does not explicitly teach transceivers operating in "first and second different bands of frequencies" or detail the resource monitoring as a distinct interface feeding back to the virtual MAC.

Secondary Reference: US20090141691A1 (Jain)

Jain discloses an "Access Point for Wireless Local Area Network" that addresses these missing elements.

• Wireless transceivers in different frequency bands: Jain explicitly teaches an "Access Point... includes... a plurality of radio units coupled to the processor... Each radio unit is configured to transmit and receive signals in at least one frequency band". This directly addresses the "first and second wireless transceivers... adapted to emit radio waves in first and second different bands of frequencies" requirement. Jain's context is a Wireless Local Area Network (WLAN), which aligns with the usage in US12250564B2.
• Resource monitoring and performance optimization: Jain further teaches that the processor is "configured to monitor current traffic load for each of the plurality of radio units and assign at least one of the plurality of radio units to a wireless client to optimize performance". This explicitly discloses the "resource monitoring" function that feeds information back to the processing logic for allocation decisions based on performance optimization.

Motivation to Combine Moratt and Jain

A PHOSITA would have been motivated to combine the teachings of Moratt and Jain to create a more robust, efficient, and flexible wireless networking device to handle bandwidth-intensive data streams, as claimed in US12250564B2.

1. Enhanced Bandwidth and Coverage: Moratt provides a software-defined approach to dynamically manage bandwidth using virtual MACs for QoS. A PHOSITA seeking to improve the actual physical capacity and coverage of such a system would naturally look to multi-radio hardware. Jain's teaching of using "plurality of radio units" operating in "at least one frequency band" within an access point offers a direct solution to expand the pool of available wireless resources. Combining these allows Moratt's dynamic allocation to leverage physically diverse and distinct frequency bands (e.g., 2.4 GHz and 5 GHz, commonly used in IEEE 802.11 Wi-Fi standards, as implied by Claim 3 of US12250564B2).
2. Optimized Resource Utilization: Jain's explicit monitoring of "current traffic load" and assignment of radio units "to optimize performance" provides the crucial real-time feedback and control mechanisms that would inform Moratt's "dynamic bandwidth allocation" and "QoS" decisions. This combination leads to a system that can intelligently select and utilize the best available physical resources, including specific frequency bands or portions thereof, based on actual environmental conditions and application demands.
3. Seamless Client Experience: By integrating Jain's multi-radio hardware and monitoring into Moratt's virtualized MAC architecture, a PHOSITA would achieve a system where a client remains associated with a virtual connection, while the underlying physical transceiver assignments (even across different frequency bands or portions within a band) are dynamically switched or aggregated for optimal performance without requiring disassociation from the actual MAC/PHY interfaces. This directly aligns with the "without requiring disassociation" and "transparent to any layer... above" aspects of US12250564B2.

The "critical limitation" regarding the non-prevention of other devices from utilizing remaining bandwidth portions simultaneously is an inherent characteristic of well-managed wireless systems that allocate discrete portions of spectrum (e.g., channels, subcarriers), which is understood by a PHOSITA in the context of both Moratt's dynamic allocation and Jain's multi-radio environment.

The combination of Moratt and Jain, therefore, would have rendered Claim 1 of US12250564B2 obvious with a reasonable expectation of success, as Jain provides the multi-band physical layer and monitoring that complements and enhances Moratt's virtualized, QoS-driven dynamic bandwidth allocation framework.