The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2008
Filed:
May. 21, 2004
Huizhao Wang, San Jose, CA (US);
Xiaode Xu, Fremont, CA (US);
Wenfeng Huang, San Ramon, CA (US);
Kushal A. Patel, Sunnyvale, CA (US);
Huizhao Wang, San Jose, CA (US);
Xiaode Xu, Fremont, CA (US);
Wenfeng Huang, San Ramon, CA (US);
Kushal A. Patel, Sunnyvale, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
The present invention detects a micro-roaming client in a WLAN. Once a micro-roaming client is detected, APs coordinate with each other and assign the client to a specific AP. In an embodiment, a user-configurable anchor timer for micro-roaming clients is provided, so that when the timer has expired, the client is free to roam within the overlapping cell until it becomes anchored to an AP again. In various embodiments, environmental variables can affect APs to release an anchored client to roam again. These environmental variables may include low RSSI from the client, a high percentage of frame loss to the client, or a low data rate. The present invention also provides a new protocol that is resilient and self-sustaining with minimal user configuration required.