Transferring context during hand-over of mobile node in a wireless network
First Claim
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1. A method, comprising:
- when an access point transfers a service context to another access point during a hand-over of a mobile node in a wireless mesh network, setting transfer boundaries according to relative positions of access points in the wireless mesh network with respect to the mobile node, and determining access point types of access points based upon the set transfer boundaries, with a first type of access points including an access point initially connected to the mobile station and access points arranged at the set transfer boundaries and a second type of access points including access points arranged between the set transfer boundaries; and
transferring the service context to the access points arranged in a moving direction of the mobile node based upon context transfer policies according to the determined access point types prior to the hand-over of the mobile node in response to movement of the mobile station, andduring the transfer of the service context to the access points arranged in a direction of the movement direction of the mobile node based upon the context transfer policies conforming to the determined access point types, the access point initially connected to the mobile station;
searching a client list table for data corresponding to the mobile node, andtransferring the service context to access points spaced at one hop from the access point initially connected to the mobile station when the client list table does not contain data corresponding to the mobile node, and transfer the service context to at least one access point arranged in the direction of the movement of the mobile node according to the type of the at least one connected access point based upon the client list table containing data of the mobile node.
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Abstract
In transferring a service context during hand-over of a mobile node located in a wireless mesh network, transfer boundaries are set according to positions spaced from an initial Access Point (AP) to which the mobile node is initially connected to, AP types being determined based upon the set transfer boundaries. Prior to hand-over of the mobile node in response to its movement, a service context is transferred to APs arranged in a moving direction of the mobile node based upon context transfer policies according to the determined AP types.
23 Citations
17 Claims
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1. A method, comprising:
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when an access point transfers a service context to another access point during a hand-over of a mobile node in a wireless mesh network, setting transfer boundaries according to relative positions of access points in the wireless mesh network with respect to the mobile node, and determining access point types of access points based upon the set transfer boundaries, with a first type of access points including an access point initially connected to the mobile station and access points arranged at the set transfer boundaries and a second type of access points including access points arranged between the set transfer boundaries; and transferring the service context to the access points arranged in a moving direction of the mobile node based upon context transfer policies according to the determined access point types prior to the hand-over of the mobile node in response to movement of the mobile station, and during the transfer of the service context to the access points arranged in a direction of the movement direction of the mobile node based upon the context transfer policies conforming to the determined access point types, the access point initially connected to the mobile station; searching a client list table for data corresponding to the mobile node, and transferring the service context to access points spaced at one hop from the access point initially connected to the mobile station when the client list table does not contain data corresponding to the mobile node, and transfer the service context to at least one access point arranged in the direction of the movement of the mobile node according to the type of the at least one connected access point based upon the client list table containing data of the mobile node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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when an access point transfers a service context to another access point during a hand-over of a mobile node in a Wireless-broadband network, setting transfer boundaries according to relative positions of access points in the wireless mesh network with respect to the mobile node, and determining access point types based upon the set transfer boundaries, with a first type of access points including an access point initially connected to the mobile station and access points arranged at the set boundaries and a second type of access points including access points arranged between the set boundaries; during transferring the service context to access points arranged in a direction of movement of the mobile node based upon context transfer policies according to the determined access point types, the access point initially connected to the mobile node; searching a client list table for data corresponding to the mobile node, and transferring the service context to access points spaced at one hop from the access point initially connected to the mobile node when the client list table does not contain data corresponding to the mobile node, and transfer the service context to at least one access point arranged in the direction of the movement of the mobile node according to the type of the at least one connected access point based upon the client list table containing data corresponding to the mobile node; and prior to hand-over of the node in response to the direction of the movement of the mobile station, transferring the service context to at least one access point arranged in the direction of the movement of the mobile node based upon service context transfer policies according to the access point types.
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12. An Access Point, comprising:
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a service context being transmitted to surrounding access points according to defined context transfer policies based upon access point types of the surrounding access points before a hand-over of a mobile node in response to movement of the mobile node in a wireless network, with a first type of access points including an access point initially connected to the mobile node and access points arranged at transfer boundaries and a second type of access points including access points arranged between the transfer boundaries; with the access point a connecting to the mobile node during the hand-over in the wireless network; with the access point defining the service context transfer policies according to the access point types determined based upon the transfer boundaries set to gradually increase according to relative positions of access points from an initial access point initially connected to the mobile node; with the access point transferring the service context to the surrounding access points according to the defined context transfer policies based upon the access point types of the surrounding access points before the hand-over of the mobile node in response to movement of the mobile node, with the first type of access points including the initial access point and the access points arranged at the set transfer boundaries and the second type of access points including the access points arranged between the set transfer boundaries; and when the access point is the initial access point and transfers the service context to the surrounding access points arranged in a moving direction of the mobile node based upon the context transfer policies according to the determined access point types, the access point searching a client list table for data corresponding to the mobile node, transferring the service context to access points spaced at one hop from the initial AP when the client list table does not contain data corresponding to the mobile node, and the access point transferring the service context to at least one access point arranged in the moving direction of the mobile node according to the type of the at least one connected access point based upon the client list table containing data corresponding to the mobile node. - View Dependent Claims (13, 14, 15, 16)
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17. A system of transferring a service context during a hand-over of a mobile node arranged in a wireless mesh network, the system comprising:
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a plurality of Access Points comprising an initial access point adapted to be connected to the mobile node during hand-over in the wireless mesh network, the plurality of access points comprising a first type access points including the initial access point and access points arranged at transfer boundaries and a second type access points including access points arranged between the transfer boundaries, each of the plurality of access points having service context transfer policies defined according to the type of the access points based upon the transfer boundaries set to gradually increase according to relative positions of the plurality of access points from the initial access point with respect to the mobile station, and the initial access point adapted to transfer the service context to surrounding access points according to the context transfer policies before the hand-over of the mobile node in response to movement of the mobile node, wherein the surrounding access points are arranged in a direction of the movement of the mobile node, and the initial access point adapted to, during transferring the service context to the access points arranged in the direction of the movement of the mobile node based upon the service context transfer policies according to the type of the access points, search a client list table for data corresponding to the mobile node, and transfer the service context to access points spaced at one hop from the initial access point when the client list table does not contain data corresponding to the mobile node, and transfer the service context to at least one access point arranged in the direction of the movement of the mobile node according to the type of the at least one connected access point based upon the client list table containing data corresponding to the mobile node; and an access router adapted to interface the plurality of access points with an Internet, wherein the mobile node is adapted to move in the wireless mesh network while changing connection with the plurality of access points.
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Specification