Method and apparatus for effecting a handoff between two IP connections for time critical communications
First Claim
1. A method of effecting a handoff from a first Internet Protocol (IP) connection to a second IP connection for a time critical communication, the method comprising:
- communicating between a first wireless station and a second station using the first IP connection and a first IP address for the first wireless station;
setting up the second IP connection between the first wireless station and the second station with a second IP address for the first wireless station, the first IP connection being a primary connection and the second IP connection being a secondary connection, both existing concurrently;
determining that the second IP connection should be the primary connection; and
changing the second IP connection to the primary connection by informing the second station that the second IP address is the primary address using stream control transmission protocol (SCTP) messages, the SCTP messages originating from the first wireless station, wherein the time critical communication is immediately switched over to the second IP connection.
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Accused Products
Abstract
A method 900 of and wireless communications unit 800 for effecting a handoff from a first Internet Protocol (IP) connection 221 to a second IP connection 331 for a time critical communication is disclosed. The method includes communicating 905 between a first wireless station 219 and a second station 331 using the first IP connection and a first IP address 223 for the first wireless station; setting up 907 the second IP connection with a second IP address for the first wireless station, the first IP connection being a primary connection and the second IP connection being a secondary connection, both existing concurrently; determining 915 that the second IP connection should be the primary connection; and changing 917 the second IP connection to the primary connection by informing the second station that the second IP address is the primary address using stream control transmission protocol (SCTP) messages, wherein the time critical communication is immediately switched over to the second IP connection.
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Citations
42 Claims
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1. A method of effecting a handoff from a first Internet Protocol (IP) connection to a second IP connection for a time critical communication, the method comprising:
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communicating between a first wireless station and a second station using the first IP connection and a first IP address for the first wireless station;
setting up the second IP connection between the first wireless station and the second station with a second IP address for the first wireless station, the first IP connection being a primary connection and the second IP connection being a secondary connection, both existing concurrently;
determining that the second IP connection should be the primary connection; and
changing the second IP connection to the primary connection by informing the second station that the second IP address is the primary address using stream control transmission protocol (SCTP) messages, the SCTP messages originating from the first wireless station, wherein the time critical communication is immediately switched over to the second IP connection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A wireless communications unit arranged and constructed to effect a handoff from a first Internet Protocol (IP) connection to a second IP connection for a time critical communication, the wireless communications unit comprising:
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a wireless transceiver and a controller cooperatively arranged for communicating with second station using the first IP connection and a first IP address for the wireless communications unit;
said controller further for;
setting up the second IP connection with a second IP address for the wireless communications unit, the first IP connection being a primary connection and the second IP connection being a secondary connection, both existing concurrently;
determining that the second IP connection should be the primary connection; and
changing the second IP connection to the primary connection by informing the second station that the second IP address is the primary address using stream control transmission protocol (SCTP) messages, wherein the time critical communication is immediately switched over to the second IP connection. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method of effecting a handoff from a first internet Protocol (IP) connection to a second IP connection for a time critical communication, the method comprising:
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communicating between a first wireless station and a second station using the first IP connection and a first IP address for the first wireless station via a first wireless access point, the first IP connection being a primary Stream Control Transmission Protocol (SCTP) connection;
establishing between the first wireless station and the second station the second IP connection using a second IP address for the first wireless station via the first wireless access point, the second IP connection being a secondary SCTP connection, the first and second IP connection existing concurrently;
associating with a second wireless access point;
setting up the second IP connection with the second IP address for the first wireless station via the second wireless access point, the first and second IP connection existing concurrently;
determining that the second IP connection should be the primary connection; and
changing the second IP connection to the primary connection by informing the second station that the second IP address is the primary address using stream control transmission protocol (SCTP) messages, the SCTP messages originating from the first wireless station,wherein the time critical communication is switched over to the second IP connection.
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Specification