RADIO COMMUNICATION SYSTEM, TERMINAL APPARATUS, AND RADIO COMMUNICATION METHOD IN RADIO COMMUNICATION SYSTEM

• US 20110111762A1
• Filed: 11/05/2010
• Published: 05/12/2011
• Est. Priority Date: 11/11/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Iwamatsu, Takanori, FURUDATE, Hideki
• Granted Patent: US 8,744,460 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A radio communication system including a first terminal apparatus group for performing a reception by using a first radio resource and a transmission by using a second radio resource; and a second terminal apparatus group for performing the reception by using the second radio resource and the transmission by using the first radio resource, and a directly radio communication is performed, the system including: a first terminal which belongs to the first terminal apparatus group and transmits allocation request of transmission band in the second radio resource by using the second radio resource; and a second terminal which belongs to the second terminal apparatus group, receives the allocation request transmitted from the first terminal, and transmits information indicating allocation of the transmission band for the first terminal, wherein the first terminal transmits data by using the allocated transmission band in the second radio resource.

Claims

1. A radio communication system including a first terminal apparatus group for performing a reception by using a first radio resource and a transmission by using a second radio resource;

and a second terminal apparatus group for performing the reception by using the second radio resource and the transmission by using the first radio resource, and a directly radio communication is performed between terminals belonging to the first and second terminal apparatus group, the radio communication system comprising;

a first terminal which belongs to the first terminal apparatus group and transmits allocation request of transmission band in the second radio resource by using the second radio resource; and

a second terminal which belongs to the second terminal apparatus group, receives the allocation request transmitted from the first terminal, and transmits information indicating allocation of the transmission band for the first terminal, wherein

the first terminal transmits data by using the allocated transmission band in the second radio resource if the first terminal receives the information indicating the allocation of transmission band.

2. The radio communication system according to claim 1, wherein the second terminal allocates unused the transmission band of the transmission band to the first terminal apparatus, and transmits the allocated transmission band as the information indicating the allocation.

3. The radio communication system according to claim 1, further comprising:

a third terminal which belongs to the second terminal apparatus group and transmits allocation request of transmission band in the first radio resource by using the first radio resource; and

a fourth terminal which belongs to the first terminal apparatus group, receives the allocation request transmitted by the third terminal, and transmits information indicating allocation of the transmission band in the first radio resource for the third terminal by using the second radio resource, wherein

the third terminal apparatus transmits data by using the allocated transmission band in the first radio resource if the third terminal apparatus receives the information indicating the allocation of the transmission band.

4. The radio communication system according to claim 3, wherein the fourth terminal allocates unused the transmission band of the transmission band to the third terminal, and transmits the allocated transmission band as the information indicating the allocation for the third terminal.

5. The radio communication system according to claim 1, wherein the first and second radio resources are radio resources which are used in the different time periods.

6. The radio communication system according to claim 3, wherein the first and second radio resources are radio resources which are used in the different time periods.

7. The radio communication system according to claim 1, the first and second terminals are radio connected with each other by OFDMA system, TDMA system, or FMDA system.

8. The radio communication system according to claim 1, the first and second terminals transmit and receive the allocation request, the information indicating the allocation, and the data by TDD system or FDD system.

9. The radio communication system according to claim 3, the third and fourth terminals are radio connected with each other by OFDMA system, TDMA system, or FMDA system.

10. The radio communication system according to claim 3, the third and fourth terminals transmit and receive the allocation request, the information indicating the allocation, and the data by TDD system or FDD system.

11. A terminal apparatus belonging to a first terminal apparatus group for performing reception by using a first radio resource and transmission by using a second radio resource, the terminal apparatus comprising:

a transmitting unit which transmits allocation request of transmission band in the second radio resource by using the second radio resource; and

a receiving unit which receives information indicating allocation of the transmission band for the terminal apparatus belonging to the first terminal apparatus group by using the first radio resource, from a terminal apparatus belonging to a second terminal apparatus group performing transmission by using the first radio resource and reception by using the second radio resource, wherein

the transmitting unit transmits data by using the allocated transmission band in the second radio resource if the receiving unit receives the information of the allocation.

12. A terminal apparatus belonging to a second terminal apparatus group for performing transmission by using a first radio resource and reception by using a second radio resource, the terminal apparatus comprising:

a receiving unit which receives allocation request of transmission band in the second radio resource by using the second radio resource, from a terminal apparatus belonging to a first terminal apparatus group performing reception by using the first radio resource and transmission by using the second radio resource; and

a transmitting unit which transmits information indicating allocation of the transmission band for the terminal apparatus belonging to the first terminal apparatus group transmitted the allocation request by using the first radio resource on the basis of the allocation request.

13. A radio communication method in a radio communication system including a first terminal apparatus group for performing reception by using a first radio resource and transmission by using a second radio resource;

and a second terminal apparatus group for performing reception by using the second radio resource and transmission by using the first radio resource, and a directly radio communication is performed between terminals belonging to the first and second terminal apparatus group, the radio communication method comprising;

transmitting allocation request of transmission band in the second radio resource by using the second radio resource, by a first terminal belonging to the first terminal apparatus group;

receiving the allocation request transmitted from the first terminal, and transmitting information indicating allocation of transmission band for the first terminal by using the first radio resource, by a second terminal belonging to the second terminal apparatus group; and

transmitting data by using the allocated transmission band in the second radio resource if the first terminal receives the information indicating the allocation of the transmission band, by the first terminal.