Session initiation protocol retransmission method
AssigneeMotorola, Inc.
InventorsWilliam N. Shores, Nandakishore A. Albal, Louis C. Depalma, Thomas P. Emmons, Jr., Derek A. Oxley
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Abstract
For a network server (35) communicating with a wireless unit (10) via a Session Initiation Protocol, a retransmission method (50) first sets a timer based upon a time likely for a mobile unit to respond (54). Then the network server waits for a response (56). When the timer set for the kind of mobile unit being used expires (64), a retransmit of the original SIP request takes place (68). Optionally, modes for waiting may include a linear mode (72) and an exponential mode (74).
Claims24
A message retransmission method for a server and a mobile unit in a Session Initiation Protocol (SIP) based communication system, the message retransmission method comprising the step of:
- sending a SIP message by the server to the mobile unit;
- setting by the server a timer based upon a mobile unit type, network type and a time likely for response by the mobile unit type;
- and
- waiting by the server until the timer expires before sending a retransmission of the SIP message.
A message retransmission method between a client and a server using Session Initiation Protocol (SIP), the message retransmission method comprising the steps of:
- sending a SIP message between the server and the client;
- setting a timer based upon a client type, network characteristics and a first time likely for a response by the client type;
- and
- waiting until the timer expires before sending a retransmission of the SIP message.
Dependencies are inferred from the claim text.