Methods and apparatus for broadcast optimization in mobile IP
First Claim
1. In a Foreign Agent supporting Mobile IP, a method of processing a registration request, comprising:
- receiving a registration request from a Mobile Node;
sending the registration request to a Home Agent;
receiving a registration reply from the Home Agent, the registration reply having a network mask extension including a network mask associated with the home address of the Mobile Node, the network mask extension being composed independent of the manner in which the home address is assigned; and
sending the registration reply to the Mobile Node.
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Accused Products
Abstract
Methods and apparatus for supporting broadcast traffic in Mobile IP are disclosed. When a Mobile Node registers via a Foreign Agent supporting Mobile IP, the Foreign Agent receives a registration request from a Mobile Node and sends the registration request to a Home Agent. A registration reply received from the Home Agent has a network mask extension including a network mask associated with the home address of the Mobile Node. The Foreign Agent then sends the registration reply to the Mobile Node. Alternatively, the Mobile Node may register via a collocated care-of address, in which case the registration reply is received directly from the Home Agent. Once the Mobile Node has obtained its network mask, it may send packets such as broadcast packets, as well as roam to its Home Agent. Additionally, in accordance with various embodiments, the Foreign Agent duplicates broadcast packets for transmission to Mobile Nodes, rather than receiving the duplicated packets from the Home Agent. In this manner, broadcast traffic in a Mobile IP environment is optimized.
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Citations
33 Claims
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1. In a Foreign Agent supporting Mobile IP, a method of processing a registration request, comprising:
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receiving a registration request from a Mobile Node; sending the registration request to a Home Agent; receiving a registration reply from the Home Agent, the registration reply having a network mask extension including a network mask associated with the home address of the Mobile Node, the network mask extension being composed independent of the manner in which the home address is assigned; and sending the registration reply to the Mobile Node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. In a Home Agent supporting Mobile IP, a method of processing a registration request, comprising:
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receiving a registration request, the registration request identifying a Mobile Node and a care-of address of the Mobile Node; updating a mobility binding table with the care-of address of the Mobile Node; composing a registration reply, the registration reply having a network mask extension including a network mask associated with the home address of the Mobile Node; and sending the registration reply to the care-of address of the Mobile Node. - View Dependent Claims (23, 24, 25, 26)
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27. A Foreign Agent supporting Mobile IP and adapted for processing a registration request, comprising:
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a processor; and a memory, at least one of the processor or the memory being adapted for; receiving a registration request from a Mobile Node; sending the registration request to a Home Agent; receiving a registration reply from the Home Agent, the registration reply having a network mask extension including a network mask associated with the home address of the Mobile Node, the network mask extension being composed independent of the manner in which the home address is assigned; and sending the registration reply to the Mobile Node. - View Dependent Claims (28, 29, 30)
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31. A Home Agent supporting Mobile IP adapted for processing a registration request, comprising:
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a processor; and a memory, at least one of the processor or the memory being adapted for; receiving a registration request, the registration request identifying a Mobile Node and a care-of address of the Mobile Node; updating a mobility binding table with the care-of address of the Mobile Node; composing a registration reply, the registration reply having a network mask extension including a network mask associated with the home address of the Mobile Node; and sending the registration reply to the care-of address of the Mobile Node.
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32. A Foreign Agent supporting Mobile IP and adapted for processing a registration request, comprising:
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a processor; and a memory, at least one of the processor or the memory being adapted for; sending an agent advertisement indicating that the Foreign Agent can understand a network mask extension transmitted with a registration reply; receiving a registration request from a Mobile Node, wherein a network mask extension is appended to the registration request by the Mobile Node in response to the agent advertisement indicating that the Foreign Agent can understand the network mask extension transmitted with the registration reply, wherein the network mask extension of the registration request indicates that the Foreign Agent can understand the network mask extension transmitted with the registration reply; sending the registration request to a Home Agent; receiving a registration reply from the Home Agent, the registration reply having a network mask extension including a network mask associated with the home address of the Mobile Node, the network mask extension being composed independent of the manner in which the home address is assigned; and sending the registration reply to the Mobile Node.
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33. A Foreign Agent supporting Mobile IP and being adapted for processing a registration request, comprising:
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a processor; and a memory, at least one of the processor or the memory being adapted for; receiving a registration request from a Mobile Node; appending a network mask extension to the registration request received from the Mobile Node, wherein the network mask extension of the registration request indicates that the Foreign Agent can understand a network mask extension transmitted with a registration reply and wherein the network mask extension of the registration request indicates a request for a network mask associated with the home address of the Mobile Node; sending the registration request to a Home Agent; receiving a registration reply from the Home Agent, the registration reply having a network mask extension including a network mask associated with the home address of the Mobile Node, the network mask extension being composed independent of the manner in which the home address is assigned; and sending the registration reply to the Mobile Node.
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Specification