Obviousness

Obviousness Analysis under 35 U.S.C. § 103 for US Patent 12169756

This analysis identifies combinations of prior art references that would render US patent 12169756 obvious to a person having ordinary skill in the art (PHOSITA) as of its priority date (October 30, 2013). The independent claim (Claim 1) is the primary focus of this analysis.

Independent Claim 1 Summary

Claim 1 describes a wireless networking device featuring a processing interface that interacts with an application having a wireless bandwidth requirement. This processing interface is connected to first and second actual MAC and PHY interfaces, which in turn are connected to first and second wireless transceivers. These transceivers are suitable for Wireless Local Area Networks (WLAN), have distinct bandwidth availabilities, and emit radio waves in first and second different bands of frequencies.

The processing interface includes:

• At least one virtual MAC interface.
• At least one resource monitoring interface that provides bandwidth availability information to the virtual MAC interface.

The virtual MAC interface is configured to, transparently to any layer above it:

• Request or create a first association between a recipient and the first actual MAC and PHY interfaces, and a second association between the recipient and the second actual MAC and PHY interfaces.
• Use the bandwidth availability information to make allocation decisions for the first and second bandwidths to at least partially satisfy the application's data stream bandwidth requirement.

The key innovative aspects to address with prior art are the virtual MAC/PHY layer managing multiple actual transceivers, operating in different frequency bands, for a single recipient through multiple associations, with dynamic bandwidth allocation that is transparent to higher layers.

Prior Art Combinations for Obviousness

Combination 1: MAC Architecture with Multiple Physical Layers, Multi-band Communication, and Dynamic Bandwidth Allocation

This combination demonstrates that the core elements of Claim 1 were known or would have been obvious to combine.

References:

1. US8363597B2 to Qualcomm Incorporated (Priority Date: 2009-04-09) – "MAC architectures for wireless communications using multiple physical layers".
2. US8565178B2 to [[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.) (Priority Date: 2010-12-03) – "Method and apparatus for wireless communication on multiple spectrum bands".
3. US20090034460A1 to Yoav Moratt (Priority Date: 2007-07-31) – "Dynamic bandwidth allocation for multiple virtual MACs".
   • Alternatively, US20060140123A1 to Intel Corporation (Priority Date: 2004-12-29) – "Methods and apparatus for distributing link-state information associated with a wireless mesh network".

Explanation of how Claim 1 elements are obvious from this combination:

• Processing interface, actual MAC/PHY interfaces, and wireless transceivers: Qualcomm's US8363597B2 explicitly teaches "MAC architectures for wireless communications using multiple physical layers (PHYs)". This provides the foundational concept of a MAC layer coordinating and utilizing multiple underlying physical layers, which correspond to actual MAC and PHY interfaces connected to wireless transceivers. The abstract further states, "A method for wireless communication includes performing Media Access Control (MAC) layer processing and transmitting data units using any of the available physical layers, potentially in parallel." This directly maps to the actual MAC/PHY interfaces and transceivers of Claim 1.
• Transceivers suitable for WLAN, with bandwidth availabilities, in different frequency bands: Samsung's US8565178B2 teaches "wireless communication on multiple spectrum bands". This directly addresses the requirement for transceivers to operate in "first and second different bands of frequencies," which would be suitable for WLAN applications (e.g., 2.4 GHz and 5 GHz Wi-Fi bands, as implicitly covered by Claim 2 and 3). The inherent nature of wireless transceivers means they have bandwidth availabilities.
• Virtual MAC interface and resource monitoring interface: Qualcomm's US8363597B2 describes a "MAC layer" that manages "multiple physical layers". This MAC layer effectively acts as a "virtual MAC interface" in the context of US12169756, abstracting the complexity of multiple physical radios from higher layers. The ultra-streaming block in US12169756 performs "monitoring function... that feeds back wireless resource availability to the decision block". Intel's US20060140123A1 explicitly teaches "distributing link-state information" in a wireless network, which directly encompasses the function of a "resource monitoring interface" providing information about bandwidth availabilities.
• Virtual MAC configured to create multiple associations for a recipient, transparently: Qualcomm's US8363597B2's concept of a single MAC managing multiple PHYs for communication implies that a single data stream for a recipient can utilize multiple physical links. Moratt's US20090034460A1 discusses a scenario where "a user has multiple network connections and multiple virtual MAC addresses" and that "the system dynamically allocates available bandwidth among virtual MAC addresses". This indicates that a single recipient can be associated with multiple MAC/PHY resources. The transparency to higher layers is a common goal in network virtualization and is inherent in Qualcomm's single MAC layer managing multiple PHYs.
• Using monitoring information for bandwidth allocation decisions: Moratt's US20090034460A1 focuses on "dynamic bandwidth allocation". When combined with Intel's US20060140123A1, which teaches monitoring "link-state information", it becomes obvious to use this monitored information (e.g., bandwidth availability) to make informed allocation decisions across the multiple physical layers managed by the virtual MAC, to satisfy an application's bandwidth requirements.

Motivation for a PHOSITA to combine these references:
A PHOSITA, aiming to increase the effective bandwidth and efficiency of wireless networks for data-intensive applications, would be motivated to combine these teachings.

• The motivation from US8363597B2 is clear: utilize "multiple physical layers" under a unified MAC to enhance wireless communication capabilities.
• The motivation from US8565178B2 is to improve performance by leveraging "multiple spectrum bands", which can provide greater capacity or reduce interference compared to a single band. Combining this with multiple physical layers allows for simultaneous operation across these diverse bands.
• The motivation from US20090034460A1 (or US20060140123A1) is to dynamically and efficiently manage these aggregated bandwidth resources based on actual availability and application demands. This optimizes the use of the expanded capacity provided by multi-radio, multi-band operation.

Therefore, it would have been obvious for a PHOSITA to combine a MAC architecture capable of utilizing multiple physical layers (Qualcomm) with the capability to operate these layers across different frequency bands (Samsung) and to dynamically allocate the aggregated bandwidth based on resource availability for a single recipient (Moratt/Intel), all while maintaining transparency to higher-level applications.

Combination 2: Multi-Radio Unification, Bandwidth Aggregation, and Multi-band Operation

This alternative combination further reinforces the obviousness of Claim 1.

References:

1. US8078208B2 to Microsoft Corporation (Priority Date: 2003-03-20) – "Multi-radio unification protocol".
2. US5818830A to Lsi Logic Corporation (Priority Date: 1995-12-29) – "Method and apparatus for increasing the effective bandwidth of a digital wireless network".
3. US8565178B2 to Samsung Electronics Co., Ltd. (Priority Date: 2010-12-03) – "Method and apparatus for wireless communication on multiple spectrum bands".

Explanation of how Claim 1 elements are obvious from this combination:

• Processing interface, actual MAC/PHY interfaces, and wireless transceivers: These are generally known components in wireless networking, and the concept of having "multiple independent radio interfaces" is taught by Microsoft's US8078208B2.
• Transceivers in different frequency bands: Samsung's US8565178B2 directly teaches the use of "multiple spectrum bands" for wireless communication, which would translate to transceivers operating in different frequency bands (e.g., WLAN bands).
• Virtual MAC interface and transparency to higher layers: Microsoft's US8078208B2 describes a "method for combining multiple independent radio interfaces into a single virtual radio interface" and "presenting the combined radio interfaces as a single virtual radio interface to a network stack." This directly teaches the concept of a virtual interface (analogous to a virtual MAC) that manages multiple physical radios and provides transparency to layers above it.
• Resource monitoring interface and bandwidth allocation decisions: While US8078208B2 focuses on unification, the management of multiple radios inherently requires monitoring their state. Lsi Logic's US5818830A teaches "combining the available bandwidth of the plurality of physical links to form a single logical link" to increase effective bandwidth. This implies a mechanism for determining and allocating available bandwidth from the physical links to satisfy a logical link's requirements. This function is analogous to the resource monitoring and bandwidth allocation decisions of Claim 1.
• Multiple associations for a single recipient: The concept of "combining the available bandwidth of the plurality of physical links to form a single logical link" for "a subscriber unit" (recipient) in US5818830A clearly requires establishing and managing multiple physical links for that single logical connection.

Motivation for a PHOSITA to combine these references:
A PHOSITA would seek to maximize the utility of available wireless resources for high-bandwidth applications.

• Microsoft's US8078208B2 motivates the creation of a "single virtual radio interface" from "multiple independent radio interfaces" to simplify the management and presentation of multiple radios to the operating system and applications. This naturally leads to the idea of a virtual MAC.
• Lsi Logic's US5818830A provides a strong motivation for "increasing the effective bandwidth" by "combining the available bandwidth of the plurality of physical links to form a single logical link". This directly addresses the need to satisfy high bandwidth requirements of applications by aggregating resources from multiple radios.
• Samsung's US8565178B2 provides the motivation to use these aggregated resources across "multiple spectrum bands" to further optimize performance and capacity.

Combining these references would lead a PHOSITA to unify multiple physical radios (potentially operating in different frequency bands) under a virtual interface and aggregate their bandwidth to provide a single, higher-bandwidth logical link to a recipient, all transparently to the application layer. This directly covers the key elements of Claim 1.