Electrical computers and digital processing systems: multicomput – Computer network managing – Computer network access regulating
Reexamination Certificate
2003-04-11
2009-02-10
Follansbee, John (Department: 2151)
Electrical computers and digital processing systems: multicomput
Computer network managing
Computer network access regulating
C709S223000, C709S224000, C709S226000, C709S227000, C709S228000, C709S229000, C709S230000
Reexamination Certificate
active
07490152
ABSTRACT:
A protocol identifier, such as, a GTP version identifier, is automatically cached in association with device contact information. Setup latency is reduced for subsequent connections. For instance, the cache indicates that a GGSN only supports GTPV0. An SGSN attempts to create a PDP context with the GGSN using GTPV0without first trying GTPV1. If the cache does not include a version identifier for an APN IP address, the SGSN tries to create a context with a first version (e.g., GTPV1) and, if necessary, a second version (e.g., GTPV0). An identifier associated with the successful protocol is stored in the cache in association with the contact information (e.g., APN or APN IP address). Freshness of cached information is assured. For example, when all tunnels associated with an APN IP address are torn down, a flush timer is started. If the timer expires, the cache entry is removed.
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Alcatel-Lucent USA Inc.
Follansbee John
Tang Karen C
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