Wireless transmission apparatus and wireless transmission method
A wireless transmission apparatus capable of suppressing a reduction in coverage area of a base station apparatus and improving the transmission rate in the coverage area. According to this apparatus, a mobile station ( 10 ) generates a transport signal addressed to a base station ( 30 ) and transmits it to a plurality of relay stations ( 20 - 1,20 - 2 ), each of which then generates a relay signal from the transport signal and transmits the relay signal to the base station ( 30 ). A relay instructing part ( 115 ) of the mobile station ( 10 ) decides first and second different instructions having their respective instruction contents for the generation of the relay signals. The relay instructing part ( 115 ) then sends the first instruction to the relay station ( 20 - 1 ), which is one of the plurality of relay stations ( 20 - 1,20 - 2 ), while sending the second instruction to the relay station ( 20 - 2 ), which is another one of the plurality of relay stations ( 20 - 1,20 - 2 ).
1. A wireless transmission apparatus comprising:
a transmitting section that transmits a transmission signal for a communicating party apparatus, to a plurality of relay station apparatuses, each of the plurality of relay station apparatuses generating a relay signal from the transmission signal and transmitting the generated relay signal to the communicating party apparatus;
a determining section that outputs a first command to generate a first relay signal from the transmission signal and a second command to generate a second relay signal from the transmission signal, the second relay signal being different from the first relay signal and combinable with the first relay signal at the communicating party apparatus that receives the first relay signal and the second relay signal; and
a reporting section that reports the first command to a first relay station apparatus from among the plurality of relay station apparatuses, and reports the second command to a second relay station apparatus, different from the first relay station apparatus, from among the plurality of relay station apparatuses, wherein:
the first command comprises a command to add first parity bits to the transmission signal in the first relay station apparatus, and the second command comprises a command to add second parity bits, different from the first parity bits, to the transmission signal in the second relay station apparatus.
2. The wireless transmission apparatus according to claim 1 , wherein the first command comprises a command to add first parity bits to the transmission signal in the first relay station apparatus, and the second command comprises a command to add second parity bits having a length different from a length of the first parity bits, to the transmission signal in the second relay station apparatus.
3. The wireless transmission apparatus according to claim 2 , further comprising:
an acquiring section that acquires a first reception quality of a signal received by the communicating party apparatus from the first relay station apparatus and a second reception quality of a signal received by the communicating party apparatus from the second relay station apparatus, wherein:
when the first reception quality is better than the second reception quality, the determining section sets the length of the first parity bits shorter than the length of the second parity bits.
4. A mobile station apparatus having the wireless transmission apparatus according to claim 1 .
5. A base station apparatus having the wireless transmission apparatus according to claim 1 .
6. A relay station apparatus having the wireless transmission apparatus according to claim 1 .
7. A wireless transmission apparatus comprising:
a transmitting section that transmits a transmission signal for a communicating party apparatus, to a plurality of relay station apparatuses, each of the plurality of relay station apparatuses generating a relay signal from the transmission signal and transmitting the generated relay signal to the communicating party apparatus;
a determining section that outputs a first command to generate a first relay signal from the transmission signal and a second command to generate a second relay signal from the transmission signal, the second relay signal being different from the first relay signal and combinable with the first relay signal at the communicating party apparatus that receives the first relay signal and the second relay signal; and
a reporting section that reports the first command to a first relay station apparatus from among the plurality of relay station apparatuses, and reports the second command to a second relay station apparatus, different from the first relay station apparatus, from among the plurality of relay station apparatuses, wherein:
the first command comprises a command to generate, from the transmission signal, the first relay signal comprising information bits and parity bits, and the second command comprises a command to generate, from the transmission signal, the second relay signal comprising information bits and parity bits with an information bit rate of the second relay signal being different from that of the first relay signal.
8. The wireless transmission apparatus according to claim 7 , further comprising:
an acquiring section that acquires a first reception quality of a signal received by the communicating party apparatus from the first relay station apparatus and a second reception quality of a signal received by the communicating party apparatus from the second relay station apparatus, wherein:
when the first reception quality is better than the second reception quality, the determining section sets the information bit rate in the first relay signal higher than that in the second relay signal.
9. A wireless transmission apparatus comprising:
a transmitting section that transmits a transmission signal for a communicating party apparatus, to a plurality of relay station apparatuses, each of the plurality of relay station apparatuses generating a relay signal from the transmission signal and transmitting the generated relay signal to the communicating party apparatus;
a determining section that outputs a first command to generate a first relay signal from the transmission signal and a second command to generate a second relay signal from the transmission signal, the second relay signal being different from the first relay signal and combinable with the first relay signal at the communicating party apparatus that receives the first relay signal and the second relay signal; and
a reporting section that reports the first command to a first relay station apparatus from among the plurality of relay station apparatuses, and reports the second command to a second relay station apparatus, different from the first relay station apparatus, from among the plurality of relay station apparatuses, wherein
the first command comprises a command to generate, from the transmission signal, the first relay signal comprising one of the group of information bits and parity bits, and the second command comprises a command to generate, from the transmission signal, the second relay signal comprising the other one of the group of information bits and parity bits.
10. The wireless transmission apparatus according to claim 9 , further comprising:
an acquiring section that acquires a first reception quality of a signal received by the communicating party apparatus from the first relay station apparatus and a second reception quality of a signal received by the communicating party apparatus from the second relay station apparatus, wherein:
when the first reception quality is better than the second reception quality, the determining section outputs, as the first command, a command to generate, from the transmission signal, the first relay signal comprising the information bits, and outputs, as the second command, a command to generate, from the transmission signal, the second relay signal comprising the parity bits.
11. A wireless transmission apparatus comprising:
a transmitting section that transmits a transmission signal for a communicating party apparatus, to a plurality of relay station apparatuses, each of the plurality of relay station apparatuses generating a relay signal from the transmission signal and transmitting the generated relay signal to the communicating party apparatus;
a determining section that outputs a first command to generate a first relay signal from the transmission signal and a second command to generate a second relay signal from the transmission signal, the second relay signal being different from the first relay signal and combinable with the first relay signal at the communicating party apparatus that receives the first relay signal and the second relay signal;
a reporting section that reports the first command to a first relay station apparatus from among the plurality of relay station apparatuses, and reports the second command to a second relay station apparatus, different from the first relay station apparatus, from among the plurality of relay station apparatuses; and
an adding section that adds first parity bits to the transmission signal, wherein:
the determining section outputs, as the first command, a command to add, to the transmission signal, second parity bits different from the first parity bits, and outputs, as the second command, a command to add, to the transmission signal, third parity bits different from both of the first parity bits and the second parity bits.
12. A wireless transmission method in a wireless transmitting apparatus, the wireless transmission method comprising:
transmitting a transmission signal for a communicating party apparatus, to a plurality of relay station apparatuses, each of the plurality of relay station apparatuses generating a relay signal from the transmission signal and transmitting the generated relay signal to the communicating party apparatus;
outputting a first command to generate a first relay signal from the transmission signal and a second command to generate a second relay signal from the transmission signal, the second relay signal being different from the first relay signal and combinable with the first relay signal at the communicating party apparatus that receives the first relay signal and the second relay signal; and
reporting the first command to a first relay station apparatus from among the plurality of relay station apparatuses, and reporting the second command to a second relay station apparatus, different from the first relay station apparatus, from among the plurality of relay station apparatuses, wherein:
the first command comprises a command to add first parity bits to the transmission signal in the first relay station apparatus, and the second command comprises a command to add second parity bits, different from the first parity bits, to the transmission signal in the second relay station apparatus.
13. A wireless transmission method in a wireless transmitting apparatus, the wireless transmission method comprising:
transmitting a transmission signal for a communicating parry apparatus, to a plurality of relay station apparatuses, each of the plurality of relay station apparatuses generating a relay signal from the transmission signal and transmitting the generated relay signal to the communicating party apparatus;
outputting a first command to generate a first relay signal from the transmission signal and a second command to generate a second relay signal from the transmission signal, the second relay signal being different from the first relay signal and combinable with the first relay signal at the communicating party apparatus that receives the first relay signal and the second relay signal; and
reporting the first command to a first relay station apparatus from among the plurality of relay station apparatuses, and reporting the second command to a second relay station apparatus, different from the first relay station apparatus, from among the plurality of relay station apparatuses, wherein
the first command comprises a command to generate, from the transmission signal, the first relay signal comprising information bits and parity bits, and the second command comprises a command to generate, from the transmission signal, the second relay signal comprising information bits and parity bits with an information bit rate of the second relay signal being different from that of the first relay signal.
14. A wireless transmission method in a wireless transmitting apparatus, the wireless transmission method comprising:
transmitting a transmission signal for a communicating party apparatus, to a plurality of relay station apparatuses, each of the plurality of relay station apparatuses generating a relay signal from the transmission signal and transmitting the generated relay signal to the communicating party apparatus;
outputting a first command to generate a first relay signal from the transmission signal and a second command to generate a second relay signal from the transmission signal, the second relay signal being different from the first relay signal and combinable with the first relay signal at the communicating party apparatus that receives the first relay signal and the second relay signal; and
reporting the first command to a first relay station apparatus from among the plurality of relay station apparatuses, and reporting the second command to a second relay station apparatus, different from the first relay station apparatus, from among the plurality of relay station apparatuses, wherein
the first command comprises a command to generate, from the transmission signal, the first relay signal comprising one of the group of information bits and parity bits, and the second command comprises a command to generate, from the transmission signal, the second relay signal comprising the other one of the group of information bits and parity bits.