Base Station Device, Wireless Terminal, Wireless Communication Management Device, And Wireless Communication System

• US 20090323663A1
• Filed: 03/25/2009
• Published: 12/31/2009
• Est. Priority Date: 06/30/2008
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: NAKATSUGAWA, Keiichi
• Granted Patent: US 8,194,584 B2
• Time in Patent Office: Days
• US Class Current: 370/343
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/29 between an access point and the access point controlling device
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A base station device includes: a connection determining unit that determines whether a connection can be allowed in response to a wireless communication connection request from a wireless terminal that can have wireless communications with other base stations; a frequency calculating unit that calculates the frequency at which the connection determining unit prohibits a connection; and a power changing unit that changes transmission power, based on the connection prohibition frequency.

Claims

1. A base station device comprising:

a connection determining unit that determines whether a connection can be allowed in response to a wireless communication connection request from a wireless terminal that can have wireless communications with other base stations;

a frequency calculating unit that calculates a frequency at which the connection determining unit prohibits a connection; and

a power changing unit that changes transmission power, based on the frequency at which a connection is prohibited.

2. The base station device as claimed in claim 1, further comprising

a quality detecting unit that detects quality of a wireless communication with the wireless terminal,

wherein the power changing unit changes the transmission power, based on the quality of the wireless communication.

3. A base station device comprising:

a connection determining unit that determines whether a connection can be allowed in response to a wireless communication connection request from a wireless terminal that can have wireless communications with other base stations;

a frequency calculating unit that calculates a frequency at which the connection determining unit prohibits a connection;

an information transmitting unit that transmits information about the connection prohibition frequency to a wireless communication management device via a network;

an instruction receiving unit that receives information about an instruction generated by the wireless communication management device based on the information about the connection prohibition frequency via the network; and

a power changing unit that changes transmission power, based on the information about the instruction.

4. The base station device as claimed in claim 3, further comprising

a quality detecting unit that detects quality of a wireless communication with the wireless terminal,

wherein:

the information transmitting unit transmits the information about the quality of the wireless communication to the wireless communication management device via the network; and

the instruction receiving unit receives the information about the instruction generated by the wireless communication management device based on the information about the quality of the wireless communication via the network.

5. A wireless communication management device that is connected to a base station device via a network,

the wireless communication management device comprising:

an information receiving unit that receives information via the network, the information being about a frequency at which the base station device prohibits a connection in response to a wireless communication connection request from a wireless terminal that can have wireless communications with other base stations;

an instruction information generating unit that generates information about an instruction to change transmission power, based on the information about the connection prohibition frequency; and

an instruction transmitting unit that transmits the information about the instruction to the base station device via the network.

6. A wireless communication system comprising:

a base station device; and

a wireless communication management device that is connected to the base station device via a network,

wherein;

the base station device includes;

a connection determining unit that determines whether a connection can be allowed in response to a wireless communication connection request from a wireless terminal that can have wireless communications with other base stations;

a frequency calculating unit that calculates a frequency at which the connection determining unit prohibits a connection;

an information transmitting unit that transmits information about the connection prohibition frequency to the wireless communication management device via the network;

an instruction receiving unit that receives information about an instruction from the wireless communication management device via the network; and

a power changing unit that changes transmission power, based on the information about the instruction; and

the wireless communication management device includes an instruction information generating unit that generates the information about the instruction to change the transmission power for wireless communications of the base station device with the wireless terminal, based on the information about the connection prohibition frequency.

7. A base station device comprising:

a connection determining unit that determines whether a connection can be allowed in response to a wireless communication connection request from a wireless terminal that can have wireless communications with other base stations;

a notifying unit that notifies the wireless terminal that a connection is prohibited in response to the connection request;

an instruction receiving unit that receives information about an instruction from a management device via a network, the instruction being issued based on a frequency at which a connection is prohibited in response to the connection request; and

a power changing unit that changes transmission power, based on the information about the instruction.

8. A base station device comprising:

an information receiving unit that receives connection prohibition information and identification information for identifying another base station device, the connection prohibition information indicating that the another base station device prohibits a connection in response to a wireless communication connection request from a wireless terminal that can have wireless communications with other base stations; and

an information transmitting unit that transmits the connection prohibition information and the identification information to a wireless communication management device via a network.

9. A wireless terminal comprising:

a connection requesting unit that sends a wireless communication connection requests to a first base station device;

a holding unit that holds identification information for identifying the first base station device, when a connection is prohibited in response to the connection request; and

an information transmitting unit that transmits connection prohibition information and the identification information for identifying the first base station device to a second base station device, the connection prohibition information indicating that the first base station device prohibits a connection.

10. A wireless communication management device that is connected to a first base station device and a second base station device via a network,

the wireless communication management device comprising:

an information receiving unit that receives connection prohibition information and identification information for identifying the first base station device from the second base station device via the network, the connection prohibition information indicating that the first base station device prohibits a connection in response to a wireless communication connection request from a wireless terminal;

an instruction information generating unit that calculates a frequency at which the first base station device prohibits a connection based on the connection prohibition information and the identification information, and generates information about an instruction to change transmission power of the first base station device, based on the frequency; and

an instruction transmitting unit that transmits the information about the instruction to the first base station device.

11. A wireless communication system comprising:

a first base station device and a second base station device; and

a wireless communication management device that is connected to the second base station device via a network,

wherein;

the first base station device includes;

a connection determining unit that determines whether a connection can be allowed in response to a wireless communication connection request from a wireless terminal;

a notifying unit that notifies the wireless terminal that a connection is prohibited in response to the connection request, and sends identification information for identifying the first base station device to the wireless terminal;

an instruction receiving unit that receives information about an instruction from a management device via the network; and

a power changing unit that changes transmission power, based on the information about the instruction;

the second base station device includes;

an information receiving unit that receives connection prohibition information and the identification information for identifying the first base station device from the wireless terminal, the connection prohibition information indicating that the first base station device prohibits a connection in response to the connection request; and

an information transmitting unit that transmits the connection prohibition information and the identification information to the wireless communication management device via the network; and

the wireless communication management device includes an instruction information generating unit that calculates a frequency at which the first base station device prohibits a connection, based on the connection prohibition information and the identification information, and generates the information about the instruction to change the transmission power of the first base station device.