Apparatus for controlling handover between heterogeneous networks, method of performing handover between heterogeneous networks, and mobile router

• US 8,223,719 B2
• Filed: 09/03/2009
• Issued: 07/17/2012
• Est. Priority Date: 09/23/2008
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Chang, Dae-ig, Lee, Ho-jin, Hong, Hyun-ha, Han, Ki-seop
• Primary Examiner(s): Phan, Tri H
• Application Number:
  US12/553,622
• Publication Number:
  US 20100074221A1
• Time in Patent Office: 1,048 Days
• Field of Search: 370/260, 370328-329, 370331-332, 370/338, 370/349, 370/390, 370/393, 370/401, 455431-444, 455450-4566
• US Class Current: 370/331
• CPC Class Codes: H04W 36/0011 for data sessions of end-to-end connection
• CPC Class Codes: H04W 36/0019 adapted for mobile IP [MIP]
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 84/06 Airborne or Satellite Networks space-based or airborne stations H04B7/185
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Provided are an apparatus for controlling handover between heterogeneous networks, a method of performing handover between heterogeneous networks in a mobile router, and a mobile router. The method includes determining whether a handover to a network employing a different method from a network to which the mobile router belongs is required based on information prestored in the mobile router, the network to which the mobile router belongs determined by current location information of the mobile router and performing the handover according to the result of the determination. Mobility detection time can be reduced by applying the handover technique between wireless/satellite networks based on link trigger and location to a mobile router moving at high speed. Thus, service interruption can be prevented regardless of movement speed, even in a satellite shadow region such as a station.

Claims

1. A method of performing handover between heterogeneous networks in a mobile router managing a mobile network, comprising:

determining whether a handover to a network employing a different method from a network to which the mobile router belongs is required based on information prestored in the mobile router, the network to which the mobile router belongs determined by current location information of the mobile router; and

performing the handover according to the result of the determination,

the method further comprising, before the determining of whether the handover is required;

monitoring link trigger signal information when the mobile router moves;

determining whether the handover to the network employing the different method is required based on the link trigger signal information;

performing the handover according to the result of the determination; and

matching information about a location at which the handover is performed with the link trigger signal information and storing the result of the matching.

2. The method of claim 1, further comprising obtaining information about the network to which the handover will be performed from link trigger signal information corresponding to the current location information of the mobile router, based on the prestored information.

3. The method of claim 2, wherein the performing of the handover comprises, when a link-up trigger signal of the network employing the different method is received, performing the handover to the network employing the different method from the network to which the mobile router belongs.

4. The method of claim 3, wherein packet data is received through the network to which the mobile router belongs and the network employing the different method until a link-down trigger signal is received from the network to which the mobile router belongs.

5. The method of claim 1, wherein the determining of whether the handover is required comprises:

recognizing the current location information of the mobile router; and

comparing the current location information of the mobile router with handover location information included in the prestored information, and determining whether the handover to the network employing the different method is required at the current location of the mobile router.

6. The method of claim 1, wherein the determining of whether the handover is required comprises:

recognizing the current location information of the mobile router;

estimating a handover location based on the current location information of the mobile router; and

comparing the estimated handover location with handover location information included in the prestored information, and determining whether the handover to the network employing the different method is required at the current location of the mobile router according to the result of the determination.

7. The method of claim 6, wherein the estimating of the handover location comprises estimating the handover location based on the current location information of the mobile router in consideration of at least one of a movement speed and a handover processing time.

8. The method of claim 1, wherein the location information is global positioning system (GPS) coordinate information.

9. The method of claim 1, wherein the matching and storing of the location information comprises when the mobile router moves, matching location information of the mobile router with up/down information of link trigger signals for networks employing different methods at the current location of the mobile router, and storing the results of the matching in the form of a table.

10. An apparatus for controlling handover between heterogeneous networks, comprising:

a location information recognizer recognizing current location information of a mobile router managing a mobile network;

a handover initiation information storage storing handover location information;

a handover determiner determining whether a handover to a network employing a different method from a network accessed by the mobile router is required according to the current location information of the mobile router recognized by the location information recognizer, based on information prestored in the handover initiation information storage;

a handover performer performing the handover according to the result of the determination; and

an information collector matching link trigger signal information with the current location information of the mobile router when the handover determiner determines that the handover is required, and storing the result of the matching in the handover initiation information storage,

wherein the information collector comprises;

a link trigger information collector collecting the link trigger signal information; and

a location information collector collecting the location information recognized by the location information recognizer.

11. The apparatus of claim 10, wherein when the apparatus moves, the information collector matches location information of the apparatus with up/down link information of link trigger signals for networks employing different methods at the current location of the apparatus, and stores the results of the matching in the form of a table.

12. The apparatus of claim 10, wherein the handover determiner estimates a handover location based on the current location information of the mobile router, compares the estimated handover location with the handover location information stored in the handover initiation information storage, and determines whether the handover to the network employing the different method is required at the current location of the mobile router.

13. The apparatus of claim 12, wherein the handover determiner estimates the handover location based on current location information of the apparatus in consideration of at least one of a movement speed and a handover processing time.

14. The apparatus of claim 10, wherein the handover determiner recognizes link trigger signal information according to the current location information of the apparatus, and recognizes information about the network to which the handover will be performed according to the link trigger signal information.

15. The apparatus of claim 14, wherein when a link-up trigger signal of the network employing the different method is received, the handover determiner performs the handover from the network accessed by the mobile router to the network employing the different method.

16. A mobile router comprising an apparatus for controlling handover between heterogeneous networks, wherein the apparatus comprises:

a location information recognizer recognizing current location information of the mobile router;

a handover initiation information storage storing handover location information;

a handover determiner determining whether a handover to a network employing a different method is required according to the current location information recognized by the location information recognizer, based on information stored in the handover initiation information storage;

a handover performer performing the handover according to the result of the determination; and

an information collector matching link trigger signal information with the current location information of the mobile router when the handover determiner determines that the handover is required, and storing the result of the matching in the handover initiation information storage,

wherein the information collector comprises;

a link trigger information collector collecting the link trigger signal information; and

a location information collector collecting the location information recognized by the location information recognizer.