DHCP pool sharing mechanism in mobile environment
First Claim
Patent Images
1. A mobile wireless network, comprising:
- a plurality of subnets, at least one subnet coupled to a network router, each subnet including a DHCP server and at least one access point, wherein each neighboring subnet is confirmed to share DHCP pool resources to allow a DHCP client with a mobile device to become coupled to the wireless network. Via a subnet which has more clients than available IP addresses.
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Abstract
The present invention provides dynamic pool sharing to allow subnets with DHCP servers to borrow IP addresses when subnet capacity requirements reach preexisting limits and assign the IP addresses to DHCP clients. Specifically, the network relies on adjacent subnets to share IP addresses so DHCP clients coupled to mobile devices remain coupled to a wireless network. A DHCP client requests an IP address. A home subnet requests pool sharing with adjacent subnets and selects a candidate among the adjacent subnets. The home subnet then negotiates the selected candidate with the DHCP client.
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Citations
51 Claims
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1. A mobile wireless network, comprising:
a plurality of subnets, at least one subnet coupled to a network router, each subnet including a DHCP server and at least one access point, wherein each neighboring subnet is confirmed to share DHCP pool resources to allow a DHCP client with a mobile device to become coupled to the wireless network. Via a subnet which has more clients than available IP addresses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of allowing a DHCP client with a mobile device to remain coupled to a mobile wireless network, the wireless network including a plurality of subnets, each subnet including a DHCP server and at least one access point, the method comprising the steps of:
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a. requesting an IP address from the DHCP client to a home subnet;
b. requesting DHCP pool resources by the home subnet to adjacent subnets;
c. replying candidates to share, if any, by one or more of the adjacent subnets to the home subnet; and
d. selecting one of the candidates among the candidates as an elected IP address. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A DHCP pool sharing apparatus in a mobile wireless network, comprising:
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a. a DHCP client coupled to a mobile device for requesting an IP address; and
b. a home subnet coupled to a home DHCP server for requesting pool sharing with adjacent subnets, each adjacent subnet coupled to an adjacent DHCP server, and selecting a candidate among the adjacent subnets;
wherein the home subnet negotiates the selected candidate with the DHCP client. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A DHCP pool sharing method in a mobile wireless network, the method comprising the steps of:
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a. requesting an IP address from a DHCP client coupled to a mobile device;
b. requesting pool sharing from a home subnet coupled to a DHCP server to a plurality of adjacent subnets, each adjacent subnet coupled to an adjacent DHCP server;
c. selecting a candidate from one of the adjacent subnets; and
d. negotiating the selected candidate with the DHCP client. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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34. A mobile wireless network, comprising:
a plurality of subnets arranged in an array of subnets, such that each of the subnets has a plurality of neighboring subnets and a plurality of non-neighboring subnets, at least one of the subnets coupled to a network router, each subnet including a DHCP server and at least one access point, wherein each neighboring subnet shares DHCP pool resources with one another to allow a DHCP client coupled to a mobile device to remain coupled to the wireless network. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42)
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43. A mobile wireless network, comprising:
a plurality of subnets coupled to a master subnet, the master subnet coupled to a network router, each subnet including a DHCP server and at least one access point, wherein each neighboring subnet shares DHCP pool resources to allow a DHCP client coupled to a mobile device to remain coupled to the wireless network. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51)
Specification