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:
Apr. 23, 2013
Filed:
Jun. 25, 2010
Sudhir Jain, Fremont, CA (US);
Patrice Calhoun, Pleasanton, CA (US);
Abhijit Choudhury, Cupertino, CA (US);
Rohit Suri, Fremont, CA (US);
Ly Loi, Los Altos, CA (US);
Bhanu Gopalasetty, San Jose, CA (US);
Navindra Yadav, Cupertino, CA (US);
Fusun Ertemalp, Palo Alto, CA (US);
Sudhir Jain, Fremont, CA (US);
Patrice Calhoun, Pleasanton, CA (US);
Abhijit Choudhury, Cupertino, CA (US);
Rohit Suri, Fremont, CA (US);
Ly Loi, Los Altos, CA (US);
Bhanu Gopalasetty, San Jose, CA (US);
Navindra Yadav, Cupertino, CA (US);
Fusun Ertemalp, Palo Alto, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A system and method for a hierarchical distributed control architecture to support roaming wireless client devices. Access switches serve one or more Internet Protocol (IP) subnets that include plural IP addresses. The access switches are arranged in switch peer groups and store information about other access switches in that switch peer group and about locations of wireless client devices that are associated with any access switch in the switch peer group. The access switches are further grouped into a corresponding mobility sub-domain each including plural switch peer groups. Plural controller devices control access switches in a corresponding mobility sub-domain. Each controller device stores information about the access switches and about locations of wireless client devices within its mobility sub-domain. A central controller device communicates with the controller devices for the respective mobility sub-domains. The central controller device stores information about locations of wireless client devices in the mobility sub-domains.