WIRELESS TERMINAL, WIRELESS CONTROLLER, CORE-NETWORK DEVICE, AND WIRELESS BASE STATION

• US 20090280820A1
• Filed: 01/16/2009
• Published: 11/12/2009
• Est. Priority Date: 05/12/2008
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: NAKAHARA, Tohru
• Granted Patent: US 8,483,695 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

In a wireless terminal, a receiver receives information being broadcasted from a wireless base station as a femtocell and indicating that the wireless base station is a femtocell, and a transmitter transmits to the wireless base station a signal of a first request to secure one or more wireless resources when the receiver receives the information before the wireless terminal receives a call and a request to initiate a call. When the wireless terminal receives a second request to initiate a call, the wireless terminal performs operations for establishing a communication path by using the one or more wireless resources secured in response to the first request, where the operations do not include an operation for securing the one or more wireless resources. Therefore, it is possible to reduce the time taken to start communication after the user of the wireless terminal requests the start of the communication.

Claims

1. A wireless terminal comprising:

a receiver which receives information being broadcasted from a wireless base station as a femtocell and indicating that the wireless base station is a femtocell; and

a transmitter which transmits to said wireless base station a signal of a first request to secure one or more wireless resources when said receiver receives said information before said wireless terminal receives a call and a request to initiate a call; and

wherein, when said wireless terminal receives a second request to initiate a call, said wireless terminal performs operations for establishing a communication path by using said one or more wireless resources secured in response to said first request, where the operations do not include an operation for securing the one or more wireless resources.

2. A wireless terminal which performs wireless communication, comprising:

a broadcast-information reception unit which receives information broadcasted from a wireless base station; and

a wireless-link establishment unit which establishes a wireless link between said wireless terminal and a wireless controller when said information contains a piece indicating that the wireless base station is a femtocell, where the wireless controller controls said wireless base station.

3. The wireless terminal according to claim 2, further comprising,

a start-request reception unit which receives from a user a request to start communication, and

a wireless-access-line establishment unit which establishes a wireless access line between said wireless terminal and a core-network device when said start-request reception unit receives said request to start communication.

4. A wireless terminal which performs wireless communication, comprising:

a link-request reception unit which receives a first request to establish a wireless link in advance of reception of a second request to start communication, where the first request is transmitted from a core-network device when the core-network device detects that said wireless terminal is within an area covered by a femtocell; and

a wireless-link establishment unit which establishes a wireless link between said wireless terminal and a wireless controller when said link-request reception unit receives said first request, where the wireless controller controls a wireless base station.

5. The wireless terminal according to claim 4, further comprising,

a start-request reception unit which receives said second request to start communication;

and

a wireless-access-line establishment unit which establishes a wireless access line between said wireless terminal and said core-network device when said start-request reception unit receives said second request.

6. A wireless terminal which performs wireless communication, comprising:

a broadcast-information reception unit which receives information broadcasted from a wireless base station; and

a wireless-access-line establishment unit which establishes a wireless link and a wireless access line between said wireless terminal and said wireless base station when said information contains a piece indicating that the wireless base station is a femtocell.

7. A wireless terminal according to claim 6, further comprising,

a start-request reception unit which receives a request to start communication;

and

a communication-path establishment unit which establishes a communication path between said wireless terminal and an opposite party when said start-request reception unit receives said request to start communication.

8. A wireless terminal according to claim 6, wherein said wireless-access-line establishment unit sets up said wireless access line between said wireless terminal and said wireless base station at a minimum transmission rate.

9. A wireless terminal which performs wireless communication, comprising:

a link-request reception unit which receives a first request to establish a wireless link in advance of reception of a second request to start communication, where the first request is transmitted from a core-network device when the core-network device detects that said wireless terminal is within an area covered by a femtocell; and

a wireless-access-line establishment unit which establishes a wireless link and a wireless access line between said wireless terminal and a wireless base station when said link-request reception unit receives said first request.

10. A wireless terminal which performs wireless communication, comprising:

a broadcast-information reception unit which receives information broadcasted from a wireless base station; and

a wireless-link establishment unit which establishes a wireless link between said wireless terminal and said wireless base station when said information contains a piece indicating that the wireless base station is a femtocell.

11. A wireless terminal which performs wireless communication, comprising:

a link-request reception unit which receives a first request to establish a wireless link in advance of reception of a second request to start communication, where the first request is transmitted from a core-network device when the core-network device detects that said wireless terminal is within an area covered by a femtocell; and

a wireless-link establishment unit which establishes a wireless link between said wireless terminal and a wireless base station when said link-request reception unit receives said first request.

12. A wireless controller which controls a wireless base station, comprising:

a link-request reception unit which receives a request to establish a wireless link, where the request is transmitted from a wireless terminal when the wireless terminal receives information being broadcasted from said wireless base station and indicating that the wireless base station is a femtocell; and

a wireless-link establishment unit which establishes a wireless link between said wireless terminal and said wireless controller when said link-request reception unit receives said request to establish a wireless link.

13. A core-network device which performs communication with a wireless terminal, comprising:

a location registration unit which registers a location of said wireless terminal;

a femtocell judgement unit which determines, on the basis of said location of said wireless terminal registered by said location registration unit, whether or not the wireless terminal is within an area covered by a femtocell; and

a wireless-link request unit which requests said wireless terminal to establish a wireless link when the wireless terminal is determined to be within the area covered by the femtocell.

14. A wireless base station which performs wireless communication, comprising:

an information broadcast unit which broadcasts information containing a piece which indicates that said wireless base station is a femtocell; and

a wireless-link command unit which transmits to a wireless terminal a command to establish a wireless link between said wireless base station and the wireless terminal when the wireless base station receives a request from the wireless terminal after the wireless terminal receives said information broadcasted by said information broadcast unit.

15. A wireless base station which performs wireless communication, comprising:

a location registration unit which registers a location of a wireless terminal;

a femtocell judgement unit which determines, on the basis of said location of said wireless terminal registered by said location registration unit, whether or not the wireless terminal is within an area covered by said wireless base station as a femtocell; and

a wireless-link request unit which requests said wireless terminal to establish a wireless link when the wireless terminal is determined to be within the area covered by the wireless base station.