Apparatus and method for avoiding data loss following an inter-PDSN handoff based on a simple IP network
First Claim
1. A method 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:
- detecting, by an access terminal, a handoff from the first PDSN to the second PDSN;
in response to the detecting, starting, by the access terminal, 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
based on whether the session keep timer has expired, transmitting, by the access terminal, a plurality of data packets to a server until an acknowledgment is received from the server.
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Accused Products
Abstract
The disclosure is related to 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. An aspect includes detecting, by an access terminal, a handoff from the first PDSN to the second PDSN, in response to the detecting, starting, by the access terminal, 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, based on whether the session keep timer has expired, transmitting, by the access terminal, a plurality of data packets to a server until an acknowledgment is received from the server.
11 Citations
30 Claims
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1. A method 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:
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detecting, by an access terminal, a handoff from the first PDSN to the second PDSN; in response to the detecting, starting, by the access terminal, 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 based on whether the session keep timer has expired, transmitting, by the access terminal, a plurality of data packets to a server until an acknowledgment is received from the server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. 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:
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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. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. 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:
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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.
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30. 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:
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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.
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Specification