Performing handover by deferring IP address establishment
First Claim
1. A method of handover for broadband wireless access systems, the method comprising:
- determining that handover for a mobile station is necessary while a session connection exists between end users;
notifying from a first point of attachment to a second point of attachment that the session is to be maintained by the second point of attachment after handover;
performing handover procedures by a mobile station to associate with the second point of attachment;
informing from the second point of attachment to the mobile station that a mobile station downlink data pending element exists; and
delaying Internet Protocol addressing after receiving the downlink data is pending element, if the Internet Protocol addressing needs to be changed.
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Accused Products
Abstract
In a broadband wireless access system, when handover is performed while receiving data, a method of deferring IP address establishment procedures is provided to allow such data to be delivered between the base stations. When the terminal receiving downlink data moves from a first base station region to a second base station region, the first base station delivers the downlink data to the second base station, and the second base station uses a particular message to inform that there is data to be delivered to the terminal such that the IP address establishment of the terminal is deferred.
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Citations
41 Claims
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1. A method of handover for broadband wireless access systems, the method comprising:
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determining that handover for a mobile station is necessary while a session connection exists between end users;
notifying from a first point of attachment to a second point of attachment that the session is to be maintained by the second point of attachment after handover;
performing handover procedures by a mobile station to associate with the second point of attachment;
informing from the second point of attachment to the mobile station that a mobile station downlink data pending element exists; and
delaying Internet Protocol addressing after receiving the downlink data is pending element, if the Internet Protocol addressing needs to be changed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of handover for broadband wireless access systems, the method comprising:
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determining that handover is necessary while a session connection exists between end users;
informing by a mobile station to a new point of attachment, to perform old point of attachment release with data forwarding indication;
notifying from an old point of attachment to the new point of attachment that the session is to be maintained by the new point of attachment after handover;
performing handover procedures by the mobile station to associate with the new point of attachment;
informing from the new point of attachment to the mobile station, that a mobile station downlink data pending element exists; and
delaying Internet Protocol addressing after receiving the downlink data pending element, if Internet Protocol addressing needs to be changed. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of handover for a broadband wireless access system, the method comprising:
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if a mobile terminal receiving downlink data moves from a region served by a first base station to a region served by a second base station, the first base station forwards the downlink data to the second base station, and the second base station informs the mobile terminal that the downlink data should be forwarded to the mobile terminal. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of maintaining data reception during mobility in broadband wireless access systems, the method comprising:
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performing handover with a first base station and a second base station, while receiving downlink data from the first base station;
receiving an indication that the second base station will forward additional downlink data related to the downlink data previously received from the first base station;
delaying Internet Protocol address establishment until the additional downlink data is received; and
receiving the additional downlink data from the second base station. - View Dependent Claims (39)
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40. A method of maintaining data transmissions during mobility in broadband wireless access systems, the method comprising:
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performing handover for a mobile station with a first base station and a second base station, while sending downlink data from the first base station to the mobile station;
sending an indication to the mobile station that the second base station will forward additional downlink data related to the downlink data previously sent from the first base station; and
sending the additional downlink data from the second base station to the mobile station which delayed Internet Protocol address establishment until the additional downlink data is completely received. - View Dependent Claims (41)
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Specification