LINK ESTABLISHMENT METHOD AND MOBILE COMMUNICATION SYSTEM

• US 20090042597A1
• Filed: 08/04/2008
• Published: 02/12/2009
• Est. Priority Date: 08/07/2007
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: YUUKI, Shinji
• Granted Patent: US 8,140,051 B2
• Time in Patent Office: Days
• US Class Current: 455/525
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 92/045 between access point and backbone network device
• CPC Class Codes: H04W 92/20 between access points

Abstract

A mobile communication system that establishes a link between a plurality of base stations in which an adjacency condition is satisfied. The mobile communication system including a first base station that transmits a broadcast packet including its own location information and radius information of a wireless service area. Also included is a second base station that determines the adjacency condition between the wireless service areas based on the location information of the first base station and the radius information of the wireless service area, included in the packet received from the first base station, and the second base station'"'"'s location information and the radius information of the wireless service area. The link is preferably established between the first and second base stations in which the adjacency condition is satisfied.

Claims

1. A link establishment method of a mobile communication system that establishes a link between a plurality of base stations, comprising:

transmitting, by a first base station, a broadcast packet including the first base station'"'"'s location information and radius information of a wireless service area;

determining, by a second base station that received the broadcast packet, an adjacency condition between wireless service areas of the first and second base stations based on location information of the second base station and the radius information of each sector in which its own wireless service area is divided in each direction; and

establishing a link between the first and second base stations in which the adjacency condition is satisfied.

2. The method of claim 1, wherein the second base station determines that the adjacency condition is satisfied when the adjacent sectors lie over each other on a line which connects the first base station to the second base station.

3. The method of claim 2, wherein the second base station transmits back a reply packet including the its own location information and an IP address used to establish a link between the second base station and the first base station when the adjacency condition is satisfied.

4. A mobile communication system that establishes a link between a plurality of base stations in which an adjacency condition is satisfied, the mobile communication system comprising:

a first base station that transmits a broadcast packet including its own location information and radius information of a wireless service area; and

a second base station that determines an adjacency condition between wireless service areas of the first base station and the second base station based on the location information of the first base station and the radius information of the wireless service area, included in the packet received from the first base station, and location information of the second base station and the radius information of the wireless service area,

wherein the link is established between the first and second base stations in which the adjacency condition is satisfied.

5. The mobile communication system according to claim 4, wherein the second base station determines that the adjacency condition is satisfied when the adjacent sectors lie over each other on a line which connects the first base station to the second base station.

6. The mobile communication system according to claim 5, wherein the second base station transmits back a reply packet including its own location information and an IP address used to establish a link between the second base station and the first base station when the adjacency condition is satisfied.

7. The mobile communication system according to claim 5, wherein the second base station discards the received packet when the adjacency condition is not satisfied.

8. The mobile communication system according to claim 4, wherein the first and second base stations each have a plurality of IP addresses that are set to each direction of the wireless service area for each station, and the first and second base stations establish the link by using the IP address in an opposite direction to each other.

9. The mobile communication system according to claim 4, wherein the broadcast packet includes an IP address that is set to each direction of its own station.

10. The mobile communication system according to claim 4, wherein the broadcast packet includes a MAC address set to correspond to the IP address of its own station.

11. The mobile communication system according to claim 6, wherein the reply packet includes the MAC address set to correspond to the IP address of the second base station.

12. A mobile communication system that establishes a link between a plurality of base stations, in which an adjacency condition is satisfied, the mobile communication system comprising:

a first base station that transmits a broadcast packet including its own location information and radius information of each sector in which a wireless service area of the first base station is divided in each direction; and

a second base station that determines an adjacency condition between the sectors based on the second base station'"'"'s location information and radius information of each in which its own wireless service area is divided in each direction,

wherein the link is established between the first and second base stations in which the adjacency condition is satisfied.