Hand-off method using edge nodes in mobile ad-hoc network
First Claim
Patent Images
1. A method of detecting a node location of a mobile ad-hoc network (MANET), the method comprising:
- receiving, at a node in the MANET, an Internet gateway advertisement message (IGAM) transmitted by an Internet gateway and a predetermined identifier (ID) indicating a number of times of sequentially broadcasting the IGAM;
establishing, at the node, a reverse route to the Internet gateway which transmitted the IGAM, and retransmitting the received IGAM to an external one-hop node; and
determining, at the node, that the node is an edge node in the MANET if the node does not receive a message retransmitted from another node having a greater hop count than a hop count of the node.
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Abstract
A hand-off method including detecting edge nodes located at edges of a mobile ad-hoc network (MANET); retransmitting, at the detected edge nodes, an Internet gateway advertisement message (IGAM) at a new period; and performing a hand-off of a mobile device moving from an infrastructure network to the MANET using the retransmitted IGAM.
19 Citations
18 Claims
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1. A method of detecting a node location of a mobile ad-hoc network (MANET), the method comprising:
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receiving, at a node in the MANET, an Internet gateway advertisement message (IGAM) transmitted by an Internet gateway and a predetermined identifier (ID) indicating a number of times of sequentially broadcasting the IGAM; establishing, at the node, a reverse route to the Internet gateway which transmitted the IGAM, and retransmitting the received IGAM to an external one-hop node; and determining, at the node, that the node is an edge node in the MANET if the node does not receive a message retransmitted from another node having a greater hop count than a hop count of the node. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a node in a mobile ad-hoc network (MANET), the method comprising:
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determining, at a node having a period in the MANET, whether the node is an edge node; and establishing, at the node, a new period with reference to a number of neighbor nodes and retransmitting an Internet gateway advertisement message (IGAM) at the new period when it is determined the node is the edge node, wherein the determining comprises; receiving an IGAM and a predetermined identifier (ID) indicating a number of times of sequentially broadcasting the IGAM; establishing a reverse route to the Internet gateway which transmitted the IGAM, and retransmitting the received IGAM to an external one-hop node; and determining, at the node, that the node is an edge node in the MANET if the node does not receive a message retransmitted from another node having a greater hop count than a hop count of the node.
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9. A method of operating a node in a mobile ad-hoc network (MANET), the method comprising:
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determining, at a node having a period in the MANET, whether the node is an edge node; and establishing, at the node, a new period with reference to a number of neighbor nodes and retransmitting an Internet gateway advertisement message (IGAM) at the new period when it is determined the node is the edge node, wherein the new period is a random value ranging from 0.03 second to 0.07 second according to a mobile Internet Protocol version 6 (IPv6).
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10. A method of operating a node in a mobile ad-hoc network (MANET), the method comprising:
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determining, at a node having a period in the MANET, whether the node is an edge node; and establishing, at the node, a new period with reference to a number of neighbor nodes and retransmitting an Internet gateway advertisement message (IGAM) at the new period when it is determined the node is the edge node, wherein the new period is proportional to a number of neighbor nodes having a same communication range as the edge node.
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11. A method of operating a node in a mobile ad-hoc network (MANET), the method comprising:
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determining, at a node having a period in the MANET, whether the node is an edge node; and establishing, at the node, a new period with reference to a number of neighbor nodes and retransmitting an Internet gateway advertisement message (IGAM) at the new period when it is determined the node is the edge node, wherein the new period is calculated in accordance with an equation as follows;
new period=initial period * the number of neighbor nodes * vwherein the neighbor nodes are located within a same communication range as the edge node, an initial period is adjustable according to the number of neighbor nodes in a range from 3 seconds to 16 seconds, and V is a random value greater than 0 and less than 2.
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12. A node in a mobile ad-hoc network (MANET), comprising:
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a first means which receives an Internet gateway advertisement message (IGAM) and a predetermined identifier (ID) indicating a number of times of sequentially broadcasting the IGAM; a second means which establishes a reverse route to an Internet gateway which transmitted the IGAM, and retransmits the received IGAM to an external one-hop node; and a third means which determines that the node is an edge node in the MANET if the node does not receive a message retransmitted from another node having a greater hop count than a hop count of the node.
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13. A node in a mobile ad-hoc network (MANET), the node having a period, the node comprising:
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a first means which determines if the node is an edge node; and a second means which establishes a new period with reference to a number of neighbor nodes, and retransmits an IGAM at the new period if the node is the edge node. - View Dependent Claims (14)
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15. A mobile ad-hoc network (MANET), comprising:
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an Internet gateway which broadcasts an Internet gateway advertisement message (IGAM) and an identifier (ID) indicating the number of times the IGAM is sequentially broadcasted from the Internet gateway to a node in the MANET; and the node which receives the IGAM establishes a reverse route from the node to the Internet gateway, and retransmits the received IGAM from the node to a one-hop node, wherein if a message from another node having a greater hop count is not received, the node is an edge node of the MANET.
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16. A mobile ad-hoc network (MANET), comprising:
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a node which detects edge nodes located at edges of the mobile ad-hoc network (MANET) in which edge nodes are detected to be located at edges and retransmit an Internet gateway advertisement message (IGAM) at a period; and a mobile device which performs a hand-off using the retransmitted IGAM, wherein the period is proportional to a number of neighbor nodes having a communication range in accordance with a communication range of the edge nodes.
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17. A mobile ad-hoc network (MANET), comprising:
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a node which detects edge nodes located at edges of the mobile ad-hoc network (MANET), in which the edge nodes are detected to be located at edges and retransmit an Internet gateway advertisement message (IGAM) at a period; and a mobile device which performs a hand-off using the retransmitted IGAM, wherein the period is a random value ranging from 0.03 second to 0.07 second according to a mobile Internet Protocol version 6 (IPv6).
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18. A mobile ad-hoc network (MANET), comprising:
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a node which detects edge nodes located at edges of the mobile ad-hoc network (MANET), in which the edge nodes are detected to be located at edges and retransmit an Internet gateway advertisement message (IGAM) at a period; and a mobile device which performs a hand-off using the retransmitted IGAM, wherein the period is calculated in accordance with an equation as follows;
new period=initial period * a number of neighbor nodes * Vwherein the neighbor nodes are located within a communication range of the edge nodes, the initial period is adjustable according to the number of neighbor nodes in a range from 3 seconds to 16 seconds, and V is a random value greater than 0 and less than 2.
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Specification