Methods and apparatus for supporting proxy mobile IP registration in a wireless local area network
First Claim
1. In a first Access Point that supports Mobile IP, a method of sending a mobile IP registration request on behalf of a node that does not support Mobile IP, comprising:
- receiving a data packet by the first Access Point, the data packet specifying a source address;
determining by the first Access Point from the source address whether the node is located on a subnet identical to a subnet of the first Access Point; and
composing by the first Access Point and sending by the first Access Point a mobile IP registration request on behalf of the node according to whether it is determined from the source address that the node is located on the subnet identical to the subnet of the first Access Point.
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Abstract
Methods and apparatus for enabling mobility of a node that does not support Mobile IP are disclosed. When an AP receives a data packet, the AP may compare the data packet (e.g., source address) with the AP information for one or more APs to determine whether to send a registration request on behalf of the node. More particularly, the AP determines from the source address whether the node is located on a subnet identical to a subnet of the AP. If the node is located on the subnet of the AP, no Mobile IP service is required on behalf of the node. However, when it is determined from the source address that the node is not located on the subnet identical to the subnet of the Access Point, the AP composes and sends a mobile IP registration request on behalf of the node. For instance, the mobile IP registration request may be composed using the gateway associated with the “home” AP (e.g., having a matching subnet) as the node'"'"'s Home Agent.
139 Citations
25 Claims
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1. In a first Access Point that supports Mobile IP, a method of sending a mobile IP registration request on behalf of a node that does not support Mobile IP, comprising:
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receiving a data packet by the first Access Point, the data packet specifying a source address; determining by the first Access Point from the source address whether the node is located on a subnet identical to a subnet of the first Access Point; and composing by the first Access Point and sending by the first Access Point a mobile IP registration request on behalf of the node according to whether it is determined from the source address that the node is located on the subnet identical to the subnet of the first Access Point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 24, 25)
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21. An Access Point that supports Mobile IP, the Access Point being adapted for a sending a mobile IP registration request on behalf of a node that does not support Mobile IP, comprising:
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means for receiving a data packet, the data packet specifying a source address; means for determining from the source address whether the node is located on a subnet identical to a subnet of the Access Point; means for composing and sending a mobile IP registration request on behalf of the node when it is determined from the source address that the node is not located on the subnet identical to the subnet of the Access Point, wherein no Mobile IP service is required on behalf of the node when it is determined from the source address that the node is located on the subnet identical to the subnet of the Access Point.
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22. An Access Point that supports Mobile IP, the Access Point being adapted for a sending a mobile IP registration request on behalf of a node that does not support Mobile IP, comprising:
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a processor; and a memory, at least one of the processor and the memory being adapted for; receiving a data packet, the data packet specifying a source address; determining from the source address whether the node is located on a subnet identical to a subnet of the Access Point; and composing and sending a mobile IP registration request on behalf of the node according to whether it is determined from the source address that the node is located on the subnet identical to the subnet of the first Access Point.
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23. A non-transitory computer-readable medium storing thereon computer-readable instructions for sending a mobile IP registration request on behalf of a node that does not support Mobile IP in an Access Point that supports Mobile IP, comprising:
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instructions for receiving by an Access Point a data packet, the data packet specifying a source address; instructions for determining by the Access Point from the source address whether the node is located on a subnet identical to a subnet of the Access Point; and instructions for composing by the Access Point and sending by the Access Point a mobile IP registration request on behalf of the node when it is determined from the source address that the node is not located on the subnet identical to the subnet of the Access Point, wherein no Mobile IP service is required on behalf of the node when it is determined from the source address that the node is located on the subnet identical to the subnet of the Access Point.
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Specification