Sustaining session connections

Details Sustaining session connections Sustaining session connections

2011-06-14

2011-06-14

Mesfin, Yemane (Department: 2444)

Electrical computers and digital processing systems: multicomput

Computer-to-computer session/connection establishing

C709S230000, C370S431000, C370S465000

Reexamination Certificate

active

07962623

ABSTRACT:
In an embodiment, techniques for sustaining session connections are provided. The techniques send heartbeat messages when not sending a message may cause the session connection to close because of a timeout condition. Heartbeat messages are valid transport layer messages that will be ignored by protocols at higher levels of a data communications stack. As an example, the techniques may send a TCP message containing only a carriage return and line feed (“CRLF”) in its payload. Because the TCP layer considers a message containing only a CRLF to be a valid TCP message, intermediary computing devices such as proxy servers may not interpret heartbeat messages as “keep alive” messages, and may sustain session connections.

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