Prior art — US Patent 9271243

To search the USPTO database for patent 9271243, one would typically use their Patent Public Search tool or Patent Center. These platforms allow searching by patent number.

The most relevant prior art for US patent 9271243, as cited within the patent itself, are detailed below. It is important to note that without a detailed claim-by-claim analysis and a comprehensive understanding of the specific differences highlighted during prosecution, conclusively stating which claims are anticipated under 35 U.S.C. § 102 for each reference is beyond the scope of this general analysis. However, a potential area of anticipation is identified based on the general description of each prior art.

US Patent Citations:

US20040037258A1 (Scherzer Shimon B.): "Space-time-power scheduling for wireless networks"
- Publication Date: February 26, 2004.
- Filing Date: August 26, 2002.
- Brief Description: This patent application describes optimizing resource allocation (space, time, power) in wireless networks. This broadly relates to managing power in a wireless network to improve performance.
- Potential Anticipation Area: The concept of managing transmission power in a wireless network to optimize performance, which touches upon aspects of controlling output strength to minimize interference as described in claims 1, 6, and 11.
US20060187873A1 (Cisco Technology, Inc.): "Pre-emptive roaming mechanism allowing for enhanced QoS in wireless network environments"
- Publication Date: August 24, 2006.
- Filing Date: February 18, 2005.
- Brief Description: This patent application focuses on a pre-emptive roaming mechanism to enhance Quality of Service (QoS) in wireless networks. While not directly about interference reduction through power control, it deals with optimizing wireless network performance and client connectivity.
- Potential Anticipation Area: While less direct, any implicit or explicit mechanisms for managing signal quality or handover decisions that might indirectly affect or be affected by output strength control could potentially be relevant to the broader context of network optimization in claims 6 and 11.
US20070049319A1 (Hart, Brian): "Radio planning for WLANS"
- Publication Date: March 1, 2007.
- Filing Date: September 1, 2005.
- Brief Description: This patent application relates to radio planning for Wireless Local Area Networks (WLANs), which would involve considerations for coverage, capacity, and interference.
- Potential Anticipation Area: The overall concept of planning and optimizing WLANs, including aspects of managing coverage and interference, could potentially touch upon the objectives of claims 1, 6, and 11, particularly concerning how APs interact and how their output might be adjusted in a planned deployment.
US20080130541A1 (NEC Laboratories America, Inc.): "Method and System for Dynamic Power Management in Wireless Local Area Networks"
- Publication Date: June 5, 2008.
- Filing Date: December 4, 2006.
- Brief Description: This patent application describes dynamic power management in WLANs. This directly addresses the adjustment of transmission power in a wireless network.
- Potential Anticipation Area: The core idea of dynamic power management in WLANs for performance optimization, directly anticipating elements of claims 1, 6, and 11 regarding adjusting output strength to manage network conditions.
US20090010229A1 (Kazmi, Muhammad): "Token Based Radio Resource Management"
- Publication Date: January 8, 2009.
- Filing Date: December 22, 2005.
- Brief Description: This patent application describes a token-based radio resource management system. While focused on resource allocation, such systems often consider power as a controllable resource.
- Potential Anticipation Area: Any general scheme for managing radio resources, which might include power allocation as a sub-component, could broadly relate to the control mechanisms in claims 1 and 11.
US7715353B2 (Microsoft Corporation): "Wireless LAN cell breathing"
- Publication Date: May 11, 2010.
- Filing Date: April 21, 2006.
- Brief Description: This patent describes "cell breathing" in wireless LANs, a technique where the coverage area (cell size) of an access point dynamically changes based on network load or interference. This involves adjusting transmit power.
- Potential Anticipation Area: The concept of dynamically adjusting the coverage of an AP through power control to manage network conditions, directly relating to the output strength adjustment in claims 1, 6, and 11, and the objective of minimizing interference.
US20090081970A1 (Qualcomm Incorporated): "Interference management employing fractional frequency reuse"
- Publication Date: March 26, 2009.
- Filing Date: September 21, 2007.
- Brief Description: This patent application describes interference management using fractional frequency reuse, a technique to reduce interference by coordinating frequency usage among cells.
- Potential Anticipation Area: The broader field of interference management in wireless networks, particularly if it involves coordinating AP behavior to reduce interference, could be relevant to the objectives of claims 1, 6, and 11.
US20110122788A1 (Deutsche Telekom AG): "Method and system for improving quality of service in distributed wireless networks"
- Publication Date: May 26, 2011.
- Filing Date: November 20, 2009.
- Brief Description: This patent application focuses on methods and systems for improving QoS in distributed wireless networks. This would often involve managing various network parameters, potentially including power.
- Potential Anticipation Area: Any methods for optimizing distributed wireless network performance, especially if they involve controlling parameters that affect signal quality and interference, could relate to the functions described in claims 1, 6, and 11.
US20120224483A1 (3Inova Networks Inc.): "Traffic management in distributed wireless networks"
- Publication Date: September 6, 2012.
- Filing Date: March 2, 2011.
- Brief Description: This patent application details traffic management in distributed wireless networks. Efficient traffic management often relies on underlying physical layer controls, which may include power.
- Potential Anticipation Area: The general field of managing distributed wireless networks for optimal performance could broadly encompass aspects of how APs communicate and adjust their operations, relating to claims 6 and 11.

Foreign Patent Citations (Family Cites Families):

KR100621592B1 (삼성전자주식회사 - [[Samsung Electronics Co.](/litigations/by-defendant/Samsung%20Electronics%20Co.), Ltd.](/litigations/by-plaintiff/Samsung%20Electronics%20Co.%2C%20Ltd.)): "Sub-access point, system and method for regulating power of transmission signal"
- Publication Date: September 19, 2006.
- Filing Date: October 19, 2004.
- Brief Description: This Korean patent describes a sub-access point system and method for regulating the power of a transmission signal. This is highly relevant to the core invention of US9271243.
- Potential Anticipation Area: Directly addresses the regulation of transmission power in an access point system, potentially anticipating core elements of claims 1, 6, and 11, particularly concerning the adjustment of output strength based on network conditions (e.g., RSSI, interference). The US9271243 patent explicitly mentions this Korean patent publication in its background section, noting its limitation in that "the sub-AP itself needs to adjust the transmission power...it is impossible and inefficient to minimize the interference within a short period of time," suggesting that US9271243 aims to overcome this by using a centralized control device.
US7653357B2 (Toshiba America Research, Inc.): "Access point interference control and selection methods"
- Publication Date: January 26, 2010.
- Filing Date: August 22, 2005.
- Brief Description: This patent describes methods for access point interference control and selection.
- Potential Anticipation Area: The broad concept of controlling and selecting access points to manage interference directly relates to the objectives of US9271243, particularly claims 1, 6, and 11 that deal with minimizing interference between APs.
JP5213053B2 (Ｎｅｃインフロンティア株式会社): "Wireless LAN system and site survey method"
- Publication Date: June 19, 2013.
- Filing Date: March 11, 2009.
- Brief Description: This Japanese patent describes a wireless LAN system and a site survey method. Site surveys often involve assessing signal strength and potential interference to optimize AP placement and configuration.
- Potential Anticipation Area: The methods involved in site surveys for wireless LANs, particularly those that collect and analyze signal strength information to inform AP configuration, could relate to the information gathering and mapping aspects in claims 1, 6, and 11.