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US 8,027,303 B2Granted
Wireless communication system
AssigneeNokia Corporation
InventorTakako Sanda
Life of this patent
Estimating the term…
Abstract
A mobile node (MN) 100 selects an AP 302 in a subnetwork 300 as the next AP to which it is wirelessly connected, while it is present within a cell 203 corresponding to a subnetwork 200 and wirelessly connected to an AP 202 in the subnetwork 200. The MN 100 transmits data indicating a request for BETH and the next AP to which it is wirelessly connected to an AR 201 via L3 level communication, while the MN 100 is present within the cell 203. The AR 201 implements establishment of a BET between an AR 301 in the subnetwork 300 and itself. As a result, the MN 100 can still use a care of address adapted to the subnetwork 200 even after it is wirelessly connected to the subnetwork 300.
Claims25
A terminal comprising:
- a management entity configured to determine a next subnetwork to which the terminal will be in wireless communication next while the terminal is in wireless communication with a current subnetwork, and
- a transmitter configured to transmit data to a router of the current subnetwork via layer 3 level communication, the data indicating the determined next subnetwork and a request for establishing a bidirectional edge tunnel between a router of the next subnetwork and the router of the current subnetwork, the data being transmitted while the terminal is present in a communicatable range of the current subnetwork, the request being for making the router of the current subnetwork, in response to receiving the request, initiate establishment of the bidirectional edge tunnel between the router of the next subnetwork and the router of the current subnetwork, wherein the current subnetwork and the next subnetwork are foreign networks.
A method comprising:
- communicating, by a router, with an intermediary device that is within a communicatable range of a terminal configured to wirelessly communicate with the intermediary device, the router and the intermediary device being in a current subnetwork of the terminal,
- routing, via the router, a data signal between the terminal and a communication network,
- receiving, by the router, an indication of a next subnetwork to which the terminal will be in wireless communication with next, the indication being received via layer 3 level communication and including a request from the terminal for establishing a bidirectional edge tunnel, and
- in response to the router receiving the request, initiating establishment of the bidirectional edge tunnel between a router of the next subnetwork and the router in the current subnetwork, wherein the current subnetwork and the next subnetwork are foreign networks.
1 more element
A method comprising:
- determining, via a management entity of a terminal, a next subnetwork to which the terminal will be in wireless communication next while the terminal is in wireless communication with a current subnetwork, and
- transmitting, via a transmitter of the terminal to a router of the current subnetwork via layer 3 level communication, data indicating the determined next subnetwork and data indicating a request for establishing a bidirectional edge tunnel between a router of the next subnetwork and the router of the current subnetwork, the data being transmitted while the terminal is present in a communicatable range of the current subnetwork, the request being for making the router of the current subnetwork, in response to receiving the request, to initiate establishment of the bidirectional edge tunnel between the router of the next subnetwork and the router of the current subnetwork, wherein the current subnetwork and the next subnetwork are foreign networks.
A router comprising:
- an interface configured to communicate with an intermediary device that is within a communicatable range for wireless communication between a terminal and the intermediary device, the router and the intermediary device being in a current subnetwork of the terminal, and
- an allocator for allocating a care-of-address adapted to the current subnetwork, wherein the router is configured:
- to route a data signal between the terminal configured to wirelessly communicate with the intermediary device and a communication network,
- to receive data, via layer 3 level communication, indicating a next subnetwork to which the terminal will be in wireless communication with next said received data including a request from the terminal for establishing a bidirectional edge tunnel, and,
- in response to the router receiving the request, to initiate establishment of the bidirectional edge tunnel with a router of the next subnetwork, wherein the current subnetwork and the next subnetwork are foreign networks.
2 more elements
Dependencies are inferred from the claim text.