Apparatus and method for avoiding data loss following an inter-PDSN handoff based on a simple IP network

An apparatus for avoiding data loss following a handoff from a second packet data serving node (PDSN) back to a first PDSN before an expiration of a session inactivity timer at the first PDSN, comprising:

• a memory of an access terminal;
• and
• at least one processor of the access terminal coupled to the memory and configured to:
• detect a handoff from the first PDSN to the second PDSN;
• start, in response to detection of the handoff, a session keep timer corresponding to the session inactivity timer, the session inactivity timer indicating a maximum amount of time the first PDSN will maintain an inactive communication session with the access terminal;
• and
• cause a transmitter of the access terminal to transmit, based on whether the session keep timer has expired, a plurality of data packets to a server until an acknowledgment is received from the server.

An apparatus for avoiding data loss following a handoff from a second packet data serving node (PDSN) back to a first PDSN before an expiration of a session inactivity timer at the first PDSN, comprising:

• means for causing an access terminal to detect a handoff from the first PDSN to the second PDSN;
• means for causing the access terminal to start, in response to detection of the handoff, a session keep timer corresponding to the session inactivity timer, the session inactivity timer indicating a maximum amount of time the first PDSN will maintain an inactive communication session with the access terminal;
• and
• means for causing the access terminal to transmit, based on whether the session keep timer has expired, a plurality of data packets to a server until an acknowledgment is received from the server.

A non-transitory computer-readable medium for avoiding data loss following a handoff from a second packet data serving node (PDSN) back to a first PDSN before an expiration of a session inactivity timer at the first PDSN, comprising:

• at least one instruction to cause an access terminal to detect a handoff from the first PDSN to the second PDSN;
• at least one instruction to cause the access terminal to start, in response to detection of the handoff, a session keep timer corresponding to the session inactivity timer, the session inactivity timer indicating a maximum amount of time the first PDSN will maintain an inactive communication session with the access terminal;
• and
• at least one instruction to cause the access terminal to transmit, based on whether the session keep timer has expired, a plurality of data packets to a server until an acknowledgment is received from the server.