Channel search method and system for vertical handoff in wireless network environment
First Claim
1. A channel search method for a vertical handoff in a wireless network environment, the channel search method comprising:
- collecting channel information from a first terminal which is provided with a wireless local area network (WLAN) service via a channel connection with a WLAN node, the WLAN node providing a coverage area;
determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information;
selecting a channel where a channel connection between the second terminal and the WLAN node is allowed, according to the determined channel search order; and
providing the second terminal by the WLAN node with the WLAN service via the selected channel, when the second terminal enters a coverage area of the WLAN node,wherein the collecting comprises;
collecting the channel information by performing an overhearing with respect to a communication interfacing area of the first terminal,wherein the collecting of the channel information by performing the overhearing comprises;
performing the overhearing when the second terminal enters the communication interfacing area of the first terminal, before the second terminal enters the coverage area of the WLAN node; and
wherein the providing comprises;
transmitting a registration request message from the second terminal to the WLAN node via the selected channel; and
setting the channel connection between the second terminal and the WLAN node in response to the transmitted registration request message.
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Accused Products
Abstract
A channel search method for a vertical handoff in a wireless network environment is provided, the channel search method including: collecting channel information from a first terminal which is provided with a wireless local area network (WLAN) service via a channel connection with a WLAN node; and determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information. A channel search system for a vertical handoff in a wireless network environment is also provided, the channel search system including: a channel information collection unit for collecting channel information from a first terminal which is provided with a WLAN service via a channel connection with a WLAN node and a search order determination unit for determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information.
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Citations
13 Claims
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1. A channel search method for a vertical handoff in a wireless network environment, the channel search method comprising:
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collecting channel information from a first terminal which is provided with a wireless local area network (WLAN) service via a channel connection with a WLAN node, the WLAN node providing a coverage area; determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information; selecting a channel where a channel connection between the second terminal and the WLAN node is allowed, according to the determined channel search order; and providing the second terminal by the WLAN node with the WLAN service via the selected channel, when the second terminal enters a coverage area of the WLAN node, wherein the collecting comprises; collecting the channel information by performing an overhearing with respect to a communication interfacing area of the first terminal, wherein the collecting of the channel information by performing the overhearing comprises; performing the overhearing when the second terminal enters the communication interfacing area of the first terminal, before the second terminal enters the coverage area of the WLAN node; and wherein the providing comprises; transmitting a registration request message from the second terminal to the WLAN node via the selected channel; and setting the channel connection between the second terminal and the WLAN node in response to the transmitted registration request message. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory computer-readable recording medium storing a program for implementing a channel search method for a vertical handoff in a wireless network environment, the channel search method comprising:
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collecting channel information from a first terminal which is provided with a WLAN service via a channel connection with a WLAN node, the WLAN node providing a coverage area; determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information; selecting a channel where a channel connection between the second terminal and the WLAN node is allowed, according to the determined channel search order; and providing the second terminal by the WLAN node with the WLAN service via the selected channel, when the second terminal enters a coverage area of the WLAN node, wherein the collecting comprises; collecting the channel information by performing an overhearing with respect to a communication interfacing area of the first terminal, wherein the collecting of the channel information by performing the overhearing comprises; performing the overhearing when the second terminal enters the communication interfacing area of the first terminal, before the second terminal enters the coverage area of the WLAN node; and wherein the providing comprises; transmitting a registration request message from the second terminal to the WLAN node via the selected channel; and setting the channel connection between the second terminal and the WLAN node in response to the transmitted registration request message.
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9. A channel search system for a vertical handoff in a wireless network environment, the channel search system comprising:
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a channel information collection unit for collecting channel information from a first terminal which is provided with a WLAN service via a channel connection with a WLAN node, the WLAN node providing a coverage area; a search order determination unit for determining a channel search order for a channel connection between a second terminal and the WLAN node by using the collected channel information; a channel set unit configured to select a channel where a channel connection between the second terminal and the WLAN node is allowed, according to the determined channel search order; and an association processing unit configured to transmit a registration request message from the second terminal to the WLAN node via the selected channel, and setting the channel connection between the second terminal and the WLAN node in response to the transmitted registration request message wherein the channel information collection unit collects the channel information by performing an overhearing with respect to a communication interfacing area of the first terminal, and wherein the channel information collection unit performs the overhearing when the second terminal enters the communication interfacing area of the first terminal, before the second terminal enters the coverage area of the WLAN node; and wherein the WLAN node provides the second terminal by the WLAN node with the WLAN service via the selected channel, when the second terminal enters a coverage area of the WLAN node. - View Dependent Claims (10, 11, 12, 13)
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Specification