Enhanced presence routing and roster fidelity by proactive crashed endpoint detection
US7870418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2008 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Mar 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/42348
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Endpoint crashes in a real time communication system are detected by a home server providing presence and other services to the endpoint upon receipt of an error message from an access server between the endpoint and the home server. The home server uses a cookie inserted into a dialog between itself and the endpoint identifying the endpoint, a session state created by the access server identifying the endpoint, or a transaction state maintained by the home server to look up the endpoint associated with the error message. Race conditions occurring when an endpoint crashes and recovers rapidly can be avoided employing a timestamp or sequence number incremented for each new endpoint registration and comparing a current timestamp or sequence number to the stored one before updating records at the home server. By notifying other subscribers about crashed endpoints, routing fidelity is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.