Method and system for controlling packet transmission using bind update message upon handoff of mobile node in IPv6 based wireless network
First Claim
1. A method for controlling packet transmission in a corresponding node using a bind update message upon handoff from a mobile node in an IPv6 based wireless network, comprising the steps of:
- when retransmission timeout occurs after transmitting a packet via a transmission control protocol (TCP) connection established with an arbitrary mobile node, storing a currently set congestion control parameter;
retrieving each TCP connection established with a relevant mobile node so as to modify the currently set congestion control parameter to form a congestion control value, and performing congestion control; and
when the bind update message upon handoff from the mobile node is received, retrieving said each TCP connection established with the relevant mobile node, and restoring the congestion control parameter to a value stored before performance of the congestion control.
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Abstract
A method for controlling packet transmission using a bind update message upon handoff of a mobile node in an IPv6 based wireless network comprise the steps of: when a retransmission timeout occurs after transmitting a packet via a transmission control protocol (TCP) connection established with an arbitrary mobile node, storing a currently set congestion control parameter; retrieving each TCP connection established with a relevant mobile node so as to modify the currently set congestion control parameter to form a congestion control value, and performing congestion control; and, when the bind update message from the mobile node is received, retrieving each TCP connection established with the relevant mobile node, and restoring the congestion control parameter to a value stored before performing the congestion control. Thus, after congestion control is performed due to the occurrence of packet loss upon handoff of the mobile node, a state existing before performance of congestion control can be rapidly recovered, thereby reducing degradation in transfer quality due to the handoff of the mobile node.
22 Citations
17 Claims
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1. A method for controlling packet transmission in a corresponding node using a bind update message upon handoff from a mobile node in an IPv6 based wireless network, comprising the steps of:
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when retransmission timeout occurs after transmitting a packet via a transmission control protocol (TCP) connection established with an arbitrary mobile node, storing a currently set congestion control parameter;
retrieving each TCP connection established with a relevant mobile node so as to modify the currently set congestion control parameter to form a congestion control value, and performing congestion control; and
when the bind update message upon handoff from the mobile node is received, retrieving said each TCP connection established with the relevant mobile node, and restoring the congestion control parameter to a value stored before performance of the congestion control. - View Dependent Claims (2, 3, 4)
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5. A method for controlling packet transmission in a mobile node using a bind update message upon handoff from the mobile node in an IPv6 based wireless network, comprising the steps of:
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when retransmission timeout occurs after transmitting a packet via a transmission control protocol (TCP) connection established with an arbitrary corresponding node, storing a currently set congestion control parameter;
retrieving each TCP connection established with a relevant corresponding node so as to modify the currently set congestion control parameter to form a congestion control value, and performing congestion control;
when performing the handoff, transmitting the bind update message to the relevant corresponding node; and
when the bind update message is transmitted, retrieving each TCP connection established with the mobile node, and restoring the congestion control parameter to a value stored before performance of the congestion control. - View Dependent Claims (6, 7, 8)
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9. A method for controlling packet transmission using a bind update message upon handoff from a mobile node in an IPv6 based wireless network, comprising the steps of:
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when a retransmission timeout occurs after transmitting a packet via a transmission control protocol (TCP) connection established with an arbitrary mobile node, storing a currently set congestion control parameter by means of an arbitrary corresponding node;
retrieving, by means of the arbitrary corresponding node, each TCP connection established with a relevant mobile node so as to modify the currently set congestion control parameter to form a congestion control value, and performing congestion control;
when a retransmission timeout occurs after transmitting a packet via a TCP connection established with the arbitrary corresponding node, storing a currently set congestion control parameter by means of the mobile node;
retrieving, by means of the mobile node, each TCP connection established with a relevant corresponding node so as to modify the currently set congestion control parameter to form a congestion control value, and performing congestion control;
transmitting the bind update message to the relevant corresponding node by means of the mobile node when performing the handoff;
when the bind update message is transmitted, retrieving, by means of the mobile node, each TCP connection established with the mobile node so as to restore the congestion control parameter to a value stored before performing the congestion control; and
when the bind update message upon handoff from the mobile node is received, retrieving, by means of the corresponding node, said each TCP connection established with the relevant mobile node so as to restore the congestion control parameter to a value stored before performing the congestion control.
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10. A system for controlling packet transmission in an IPv6 based corresponding node, comprising:
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a transmission control protocol (TCP) module responsive to occurrence of a retransmission timeout after transmitting a packet via a TCP connection established with an arbitrary mobile node for storing a currently set congestion control parameter, for retrieving each TCP connection established with a relevant mobile node so as to modify the currently set congestion control parameter to form a congestion control value, and for performing congestion control;
an MIPv6 module for receiving a bind update message upon performance of a handoff from the relevant mobile node;
a trigger signal supply module for generating a trigger signal for triggering the congestion control performed by the TCP module when the MIPv6 module receives the bind update message; and
a trigger-performing module for retrieving each TCP connection established with the relevant mobile node so as to restore the congestion control parameter to a value stored before performance the congestion control in response to the trigger signal generated by the trigger signal supply module. - View Dependent Claims (11, 12, 13)
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14. A system for controlling packet transmission in an IPv6 based mobile node, comprising:
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a transmission control protocol (TCP) module responsive to occurrence of a retransmission timeout is occurred after transmitting a packet via a TCP connection established with an arbitrary corresponding node for storing a currently set congestion control parameter, for retrieving each TCP connection established with a relevant corresponding node so as to modify the currently set congestion control parameter to form a congestion control value, and for performing congestion control;
an MIPv6 module for transmitting a bind update message to the relevant corresponding node when a mobile node performs a handoff;
a trigger signal supply module for generating a trigger signal for triggering the congestion control performed by the TCP module when the MIPv6 module transmits the bind update message; and
a trigger-performing module for retrieving each TCP connection established with the mobile node so as to restore the congestion control parameter to a value stored before performance of the congestion control in response to the trigger signal generated by the trigger signal supply module.
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15. A system for controlling packet transmission in an IPv6 based wireless network, comprising:
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a mobile node responsive to occurrence of a retransmission timeout after transmitting a packet via a transmission control protocol (TCP) connection established with an arbitrary corresponding node for storing a currently set congestion control parameter for retrieving each TCP connection established with a relevant corresponding node so as to modify the currently set congestion control parameter to form a congestion control value, for performing congestion control, for transmitting a bind update message to the relevant corresponding node when performing a handoff, and responsive to the bind update message being transmitted for retrieving each TCP connection established with the mobile node so as to restore the congestion control parameter to a value stored before performing the congestion control; and
a corresponding node responsive to occurrence of a retransmission timeout after transmitting a packet via a TCP connection established with the mobile node for storing a currently set congestion control parameter, for retrieving each TCP connection established with a relevant mobile node so as to modify the currently set congestion control parameter to form a congestion control value, for performing congestion control, and responsive to reception of the bind update message from the mobile node for retrieving each TCP connection established with the relevant mobile node so as to restore the congestion control parameter to the value stored before performing the congestion control. - View Dependent Claims (16, 17)
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Specification