Mobile Radio Communication System Including Radio Resource Sharing Function

• US 20100041388A1
• Filed: 10/23/2009
• Published: 02/18/2010
• Est. Priority Date: 04/25/2007
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KAWASAKI, Takeshi
• Granted Patent: US 8,488,525 B2
• Time in Patent Office: Days
• US Class Current: 455/422.100
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A mobile radio communication method in which a radio resource is shared with a first communication between one of first mobile terminal devices and a radio base station, which is performed by using an infrastructure mode for performing communication controlled based on scheduling by the radio base station, and a second communication between a plurality of second mobile terminal devices, which is performed by using an ad hoc mode for performing communication by autonomous distributed control, the mobile radio communication method including advertising, by the one of the first mobile terminal devices in an area in which the radio base station exists, at a timing specified by the radio base station, a radio resource which is usable for the second communication in the ad hoc mode and is not used for the first communication in the infrastructure mode, to one of the second mobile terminal devices that is present in a range which a radio wave reaches from the one of the first mobile terminal devices and performs the second communication in the ad hoc mode, to thereby control the one of the second mobile terminal devices so as not to use a radio resource for the first communication.

Claims

1. A terminal device capable of receiving a signal transmitted from a base station, comprising:

a receiving unit that receives the signal transmitted from the base station; and

a transmitting unit that detects, based on the signal received by the receiving unit, information on a radio resource usable for terminal-to-terminal communication and a transmission timing for the information, and transmits the information at the detected transmission timing.

2. The terminal device according to claim 1, wherein the information contains one of the radio resource usable for the terminal-to-terminal communication and a radio resource restricted from being used for the terminal-to-terminal communication.

3. A terminal device capable of receiving signals transmitted from other terminal devices, comprising:

a receiving unit that receives the signals transmitted from the other terminal devices at the same timing; and

a transmitting unit that detects, based on the signals received by the receiving unit, a radio resource usable for terminal-to-terminal communication, and performs terminal-to-terminal transmission limited to the radio resource to another terminal device.

4. A communication method in a terminal device capable of receiving a signal transmitted from a base station, comprising:

receiving the signal transmitted from the base station; and

detecting, based on the received signal, information on a radio resource usable for terminal-to-terminal communication and a transmission timing for the information, and transmitting the information at the detected transmission timing.

5. A communication method in a terminal device capable of receiving signals transmitted from other terminal devices, comprising:

receiving the signals transmitted from the other terminal devices at the same timing; and

detecting, based on the received signals, a radio resource usable for terminal-to-terminal communication, and performing terminal-to-terminal transmission limited to the radio resource to another terminal device.

6. A mobile radio communication method in which a radio resource is shared with a first communication between one of first mobile terminal devices and a radio base station, which is performed by using an infrastructure mode for performing communication controlled based on scheduling by the radio base station, and a second communication between a plurality of second mobile terminal devices, which is performed by using an ad hoc mode for performing communication by autonomous distributed control, the mobile radio communication method comprising:

advertising, by the one of the first mobile terminal devices in an area in which the radio base station exists, at a timing specified by the radio base station, a radio resource which is usable for the second communication in the ad hoc mode and is not used for the first communication in the infrastructure mode, to one of the second mobile terminal devices that is present in a range which a radio wave reaches from the one of the first mobile terminal devices and performs the second communication in the ad hoc mode, to thereby control the one of the second mobile terminal devices so as not to use a radio resource for the first communication.

7. The mobile radio communication method according to claim 6, further comprising:

simultaneously broadcasting, by all of the first mobile terminal devices in the area in which the radio base station exists, information on the radio resource which is usable for the second communication in the ad hoc mode and is not used for the first communication in the infrastructure mode.

8. The mobile radio communication method according to claim 6, further comprising:

broadcasting, among the first mobile terminal devices in the area in which the radio base station exists, by the first mobile terminal device which detects a radio wave or interference from the one of the second mobile terminal devices, information on the radio resource which is usable for the second communication in the ad hoc mode and is not used for the first communication in the infrastructure mode.

9. The mobile radio communication method according to claim 6, further comprising:

broadcasting, among the first mobile terminal devices in the area in which the radio base station exists, by the first mobile terminal devices which are specified by the radio base station, information on the radio resource which is usable for the second communication in the ad hoc mode and is not used for the first communication in the infrastructure mode.

10. The mobile radio communication method according to claim 6, further comprising:

broadcasting, among the first mobile terminal devices in the area in which the radio base station exists, by the first mobile terminal devices which exist at an edge section of the area or vicinity of the edge section, information on the radio resource which is usable for the second communication in the ad hoc mode and is not used for the first communication in the infrastructure mode.