Patents by Inventor William Albert Arbaugh
William Albert Arbaugh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8977265Abstract: A method for minimizing handoff latencies when a handoff is performed in a wireless network. An access point (AP) or base station associated to a current wireless station (STA) allows information required for a reassociation to the STA to be propagated to handoff-capable neighboring APs or base stations. When the STA moves, a neighboring AP or base station performs the reassociation to the STA on the basis of context. When a handoff procedure is performed, the time taken to receive context of a corresponding STA is reduced, such that a fast handoff can be implemented.Type: GrantFiled: December 3, 2004Date of Patent: March 10, 2015Assignees: Samsung Electronics Co., Ltd., University of Maryland College ParkInventors: In-Sun Lee, Kyuno-Hun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra
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Patent number: 8838103Abstract: A method for minimizing handoff latencies when a handoff is performed in a wireless network. An access point (AP) or base station associated to a current wireless station (STA) allows information required for a reassociation to the STA to be propagated to handoff-capable neighboring APs or base stations. When the STA moves, a neighboring AP or base station performs the reassociation to the STA on the basis of context. When a handoff procedure is performed, the time taken to receive context of a corresponding STA is reduced, such that a fast handoff can be implemented.Type: GrantFiled: November 10, 2003Date of Patent: September 16, 2014Assignees: Samsung Electronics Co., Ltd., The University of Maryland College ParkInventors: In-Sun Lee, Kyung-Hun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra
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Patent number: 7929948Abstract: A roaming service method for a fast and secure wireless network is provided. In an embodiment of the present invention, an AP, which an STA associates with, transmits proactive keys needed for roaming to neighbor APs of the AP. When the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key. In another embodiment of the present invention, an authentication server transmits proactive keys needed for roaming to neighbor APs to which the STA is likely to move, so that when the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key.Type: GrantFiled: August 15, 2008Date of Patent: April 19, 2011Assignees: Samsung Electronics Co., Ltd., The University of Maryland, College ParkInventors: In-Sun Lee, Kyung-Hun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra
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Patent number: 7756510Abstract: The present invention relates to an authentication method for wireless distribution system including at least one base station providing access service to mobile stations in a coverage of the base station. In the authentication method, an unregistered base station receives an authentication request from a mobile station, multicast an identity request for identifying the mobile station over the wireless distribution system, receives identity responses from at least one base station in response to the identity request, and performs authentication of the mobile station on the basis of the identity responses. The distributed authentication method of the present invention is performed without AAA server, when a new base station is installed or isolated base stations are joined, such that it is possible to extend the network in an easy manner without degradation of the security degree and additional labor burden of the operator.Type: GrantFiled: May 12, 2006Date of Patent: July 13, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: In-Sun Lee, Sang-Boh Yun, William Albert Arbaugh, T. Charles Clancy, Min-Ho Shin
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Publication number: 20080316988Abstract: A roaming service method for a fast and secure wireless network is provided. In an embodiment of the present invention, an AP, which an STA associates with, transmits proactive keys needed for roaming to neighbor APs of the AP. When the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key. In another embodiment of the present invention, an authentication server transmits proactive keys needed for roaming to neighbor APs to which the STA is likely to move, so that when the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key.Type: ApplicationFiled: August 15, 2008Publication date: December 25, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: In-Sun Lee, Kyung-Hun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra
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Patent number: 7421268Abstract: A roaming service method for a fast and secure wireless network is provided. In an embodiment of the present invention, an AP, which an STA associates with, transmits proactive keys needed for roaming to neighbor APs of the AP. When the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key. In another embodiment of the present invention, an authentication server transmits proactive keys needed for roaming to neighbor APs to which the STA is likely to move, so that when the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key.Type: GrantFiled: May 24, 2007Date of Patent: September 2, 2008Assignees: Samsung Electronics Co., Ltd., The University of Maryland, College ParkInventors: In-Sun Lee, Kyung-Hun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra
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Patent number: 7400604Abstract: Provided is a probing method for handoff including constructing a group of neighbor access points of a current access point with which the station associated, generating subgroups of the neighbor access points by the channel assigned to the access points, probing the access points by subgroup in a subgroup selection order, and selecting the neighbor access point having best link quality as a target access point to handoff. The probing method of the present invention is implemented with a novel non-overlap graph for constructing the neighbor graph such that the probing latency is dramatically reduced, resulting in reduction of handoff delay.Type: GrantFiled: May 31, 2005Date of Patent: July 15, 2008Assignees: Samsung Electronics Co., Ltd., The University of Maryland College ParkInventors: In-Sun Lee, Kyung-Jun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra
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Patent number: 7263357Abstract: A roaming service method for a fast and secure wireless network is provided. In an embodiment of the present invention, an AP, which an STA associates with, transmits security keys needed for roaming to neighbor APs of the AP. When the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided security key. In another embodiment of the present invention, an authentication server transmits security keys needed for roaming to neighbor APs to which the STA is likely to move, so that when the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided security key.Type: GrantFiled: January 8, 2004Date of Patent: August 28, 2007Assignees: Samsung Electronics Co., Ltd., The University of MarylandInventors: In-Sun Lee, Kyung-Hun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra
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Publication number: 20040242228Abstract: A roaming service method for a fast and secure wireless network is provided. In an embodiment of the present invention, an AP, which an STA associates with, transmits proactive keys needed for roaming to neighbor APs of the AP. When the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key. In another embodiment of the present invention, an authentication server transmits proactive keys needed for roaming to neighbor APs to which the STA is likely to move, so that when the STA moves to one of the neighbor APs, a reassociation is carried out between the STA and the neighbor AP using the already provided proactive key.Type: ApplicationFiled: January 8, 2004Publication date: December 2, 2004Applicants: SAMSUNG ELECTRONICS CO., LTD., The University of Maryland, College ParkInventors: In-Sun Lee, Kyung-Hun Jang, Min-Ho Shin, William Albert Arbaugh, Arunesh Mishra