Wireless communication system, wireless communication terminal, and wireless communication method

• US 20060240792A1
• Filed: 04/10/2006
• Published: 10/26/2006
• Est. Priority Date: 04/26/2005
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Sunaga, Tohru
• Granted Patent: US 7,817,975 B2
• Time in Patent Office: Days
• US Class Current: 455/165.100
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/026 Co-operative diversity, e.g. using fixed or mobile stations as relays
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A wireless communication system includes: a base station; a first wireless communication terminal that receives a first signal from the base station; and a second wireless communication terminal that receives a second signal from the base station. The first signal is to be used by the second wireless communication terminal. The first wireless communication terminal includes: a transmitting unit that transmits the first signal to the second wireless communication terminal. The second wireless communication terminal includes: a receiving unit that receives the first signal from the first wireless communication terminal; and a signal synthesizing unit that receives the first signal from the receiving unit and performs at least one synthesis based on the -first signal and the second signal.

Claims

1. A wireless communication system comprising:

a base station;

a first wireless communication terminal that communicates with the base station through a first signal; and

a second wireless communication terminal that communicates with the base station through a second signal,

wherein the first wireless communication terminal comprises;

a transmitting unit that transmits the first signal to the second wireless communication terminal, and

wherein the second wireless communication terminal comprises;

a receiving unit that receives the first signal from the first wireless communication terminal; and

a signal synthesizing unit that receives the first signal from the receiving unit and performs at least one synthesis based on the first signal and the second signal.

2. The wireless communication system according to claim 1, wherein the transmitting unit comprises:

a first detecting unit that detects a first radio frequency from a plurality of predetermined radio frequencies, the first radio frequency being not in use but available to the second wireless communication terminal, the transmitting unit transmitting the first signal at the first radio frequency to the second wireless communication terminal, and

wherein the receiving unit comprises;

a second detecting unit that detects a second radio frequency, the receiving unit receiving the first signal at the second radio frequency from the first wireless communication terminal.

3. A wireless communication terminal that communicates with a base station and a different wireless communication terminal, the wireless communication terminal comprising:

a base station communication unit that receives a first signal from the base station, the first signal to be used by the different wireless communication terminal; and

a transmitting unit that receives the first signal from the base station communication unit and transmits the first signal to the different wireless communication terminal.

4. The wireless communication terminal according to claim 3, wherein the transmitting unit comprises:

a first detecting unit that detects a first radio frequency from a plurality of predetermined radio frequencies, the first radio frequency being not in use but available to the different wireless communication terminal, the transmitting unit transmitting the first signal at the first radio frequency to the different wireless communication terminal.

5. A wireless communication terminal that communicates with a base station and a different wireless communication terminal, the wireless communication terminal comprising:

a base station communication unit that receives a first signal from the base station;

a receiving unit that receives a second signal from the different wireless communication terminal, the second signal being not in use but available to the wireless communication terminal; and

a signal synthesizing unit that receives the second signal from the receiving unit and performs at least one synthesis based on the first signal and the second signal.

6. The wireless communication terminal according to claim 5, wherein the receiving unit comprises:

a second detecting unit that detects a first radio frequency, the receiving unit receiving the second signal at the first radio frequency from the different wireless communication terminal.

7. A wireless communication terminal that communicates with a base station and a different wireless communication terminal, the wireless communication terminal comprising:

a base station communication unit that receives first and second signals from the base station, the first signal to be used by the different wireless communication terminal, the second signal to be used by the wireless communication terminal;

a transmitting unit that receives the first signal from the base station communication unit and transmits the first signal to the different wireless communication terminal;

a receiving unit that receives a third signal from the different wireless communication terminal, the third signal being not in use but available to the wireless communication terminal; and

a signal synthesizing unit that receives the second signal from the receiving unit and performs at least one synthesis based on the second signal and the third signal.

8. The wireless communication terminal according to claim 7, wherein the transmitting unit comprises:

a first detecting unit that detects a first radio frequency from a plurality of predetermined radio frequencies, the first radio frequency being not in use but available to the different wireless communication terminal, the transmitting unit transmitting the first signal at the first radio frequency to the different wireless communication terminal.

9. The wireless communication terminal according to claim 7, wherein the receiving unit comprises:

a second detecting unit that detects a second radio frequency, the receiving unit receiving the third signal at the second radio frequency from the different wireless communication terminal.

10. A wireless communication method comprising:

transmitting a first signal from a base station through a first wireless communication terminal to a second wireless communication terminal, the first signal to be used by the second wireless communication terminal;

transmitting a second signal from the base station directly to the second wireless communication terminal; and

performing, by the second wireless communication terminal, at least one synthesis based on the first signal and the second signal.

11. The wireless communication method according to claim 10, further comprising:

detecting, by the first wireless communication terminal, a first radio frequency from a plurality of predetermined radio frequencies, the first radio frequency being not in use but available to the second wireless communication terminal, so as to transmit the first signal at the first radio frequency from the first wireless communication terminal to the second wireless communication terminal.

12. The wireless communication method according to claim 10, further comprising:

detecting, by the second wireless communication terminal, a second radio frequency, so as to receive the first signal at the second radio frequency from the first wireless communication terminal.