Maintaining point of presence at tunneling endpoint for roaming clients in distributed wireless controller system
US8441983B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2010 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Jun 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques are provided to support roaming of wireless devices in a network such that the wireless devices can keep their Internet Protocol (IP) addresses as they roam within and across mobility sub-domains. When a wireless device roams from one access switch to another access switch, a tunneling endpoint apparatus in the wireless device's home mobility sub-domain is configured to serve as the point of presence for the roamed wireless device. Traffic for the roamed wireless device is tunneled from the access switch where the wireless device has roamed (where it is currently attached) to the tunneling endpoint apparatus. When the wireless device roams across mobility sub-domains, then traffic is tunneled from the access switch where the wireless device is currently attached to the tunneling endpoint apparatus in that mobility sub-domain (called a “foreign” mobility sub-domain) to the tunneling endpoint apparatus in the wireless device's home mobility sub-domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.