Methods and apparatus for synchronizing subnet mapping tables
First Claim
1. In a first authoritative access point, a method of synchronizing two or more subnet mapping tables maintained by two or more authoritative access points, comprising:
- receiving one or more subnet mapping tables from one or more authoritative access points; and
updating a first subnet mapping table maintained by the first authoritative access point corresponding to the one or more subnet mapping tables received from the one or more authoritative access points;
wherein the first authoritative access point and the one or more authoritative access points each maintains access point information for a plurality of active access points and is responsible for sending information to the plurality of active access points regarding modifications to the access point information;
wherein each of the subnet mapping tables that have been received identifies one or more access points; and
determining whether information in the received subnet mapping table is current;
wherein updating is performed such that the first subnet mapping table includes the information from the received subnet mapping table that is determined to be current.
1 Assignment
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Accused Products
Abstract
Methods and apparatus for enabling mobility of a node that does not support Mobile IP through synchronization of access point information (e.g., subnet mapping tables) among AAPs are disclosed. In accordance with one embodiment, an authoritative access point (AAP) maintains access point information for all functioning access points (APs) and sends updates for all additions or other modifications to the continually changing access point information to other AAPs. This is accomplished by sending a copy of its local subnet mapping table to the other AAPs. The AAPs receiving the subnet mapping table then update their subnet mapping tables corresponding to the received subnet mapping table.
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Citations
27 Claims
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1. In a first authoritative access point, a method of synchronizing two or more subnet mapping tables maintained by two or more authoritative access points, comprising:
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receiving one or more subnet mapping tables from one or more authoritative access points; and updating a first subnet mapping table maintained by the first authoritative access point corresponding to the one or more subnet mapping tables received from the one or more authoritative access points; wherein the first authoritative access point and the one or more authoritative access points each maintains access point information for a plurality of active access points and is responsible for sending information to the plurality of active access points regarding modifications to the access point information; wherein each of the subnet mapping tables that have been received identifies one or more access points; and determining whether information in the received subnet mapping table is current; wherein updating is performed such that the first subnet mapping table includes the information from the received subnet mapping table that is determined to be current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 26)
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21. A computer-readable medium storing thereon computer-readable instructions for synchronizing two or more subnet mapping tables maintained by two or more authoritative access points in a first authoritative access point, comprising:
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instructions for receiving one or more subnet mapping tables from one or more authoritative access points; and instructions for updating a first subnet mapping table maintained by the first authoritative access point corresponding to the one or more subnet mapping tables received from the one or more authoritative access points; wherein the first authoritative access point and the one or more authoritative access points each maintains access point information for a plurality of active access points and is responsible for sending information to the plurality of active access points regarding modifications to the access point information; wherein each of the subnet mapping tables that have been received identifies one or more access points; determining whether the access points in each of the subnet mapping tables are alive; wherein updating is performed in accordance with whether the access points in each of the subnet mapping tables are determined to be alive.
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22. A first authoritative access point adapted for synchronizing two or more subnet mapping tables maintained by two or more authoritative access points, comprising:
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means for receiving one or more subnet mapping tables from one or more authoritative access points; and means for updating a first subnet mapping table maintained by the first authoritative access point corresponding to the one or more subnet mapping tables received from the one or more authoritative access points; wherein the first authoritative access point and the one or more authoritative access points each maintains access point information for a plurality of active access points and is responsible for sending information to the plurality of active access points regarding modifications to the access point information; wherein each of the subnet mapping tables that have been received identifies one or more access points; determining whether information in the received subnet mapping table is current; wherein updating is performed such that the first subnet mapping table includes the information from the received subnet mapping table that is determined to be current.
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23. A first authoritative access point adapted for synchronizing two or more subnet mapping tables maintained by two or more authoritative access points, comprising:
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a processor; and a memory, at least one of the processor or the memory being adapted for; receiving one or more subnet mapping tables from one or more authoritative access points; and updating a first subnet mapping table maintained by the first authoritative access point corresponding to the one or more subnet mapping tables received from the one or more authoritative access points; wherein the first authoritative access point and the one or more authoritative access points each maintains access point information for a plurality of active access points and is responsible for sending information to the plurality of active access points regarding modifications to the access point information; wherein each of the subnet mapping tables that have been received identifies one or more access points; determining whether the access points in each of the subnet mapping tables are alive; wherein updating is performed in accordance with whether the access points in each of the subnet mapping tables are determined to be alive.
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24. In a first authoritative access point, a method of synchronizing two or more subnet mapping tables maintained by two or more authoritative access points, comprising:
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receiving one or more subnet mapping tables from one or more authoritative access points; and updating a first subnet mapping table maintained by the first authoritative access point corresponding to the one or more subnet mapping tables received from the one or more authoritative access points; wherein the first authoritative access point and the one or more authoritative access points each maintains access point information for a plurality of active access points and is responsible for sending information to the plurality of active access points regarding modifications to the access point information; wherein each of the subnet mapping tables that have been received identifies one or more access points; wherein updating is performed such that the first subnet mapping table incorporates at least a portion of the information from the received subnet mapping table. - View Dependent Claims (25)
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27. In a first authoritative access point, a method of synchronizing two or more subnet mapping tables maintained by two or more authoritative access points, comprising:
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receiving one or more subnet mapping tables from one or more authoritative access points; and updating a first subnet mapping table maintained by the first authoritative access point corresponding to the one or more subnet mapping tables received from the one or more authoritative access points; wherein the first authoritative access point and the one or more authoritative access points each maintains access point information for a plurality of active access points and is responsible for sending information to the plurality of active access points regarding modifications to the access point information; wherein each of the subnet mapping tables that have been received identifies one or more access points; determining whether the access points in each of the subnet mapping tables are alive; wherein updating is performed in accordance with whether the access points in each of the subnet mapping tables are determined to be alive.
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Specification