Performing handover by deferring IP address establishment
First Claim
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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 pending element, if the Internet Protocol addressing needs to be changed.
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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.
40 Citations
31 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 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 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 (29)
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30. 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 (31)
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Specification