Wireless Communication Apparatus, Wireless Communication Method and Wireless Communication System

A communication apparatus for relaying data, comprising:

• a receiving unit;
• a determination unit which determines the quality of first data received by the receiving unit;
• a waiting unit which waits without issuing a retransmission request;
• a determination unit which determines the quality of first data received from an another communication apparatus;
• and
• a transmitting unit which transmits the first data received from the another communication apparatus.

A communication apparatus, comprising:

• a receiving unit which receives first data transmitted from a base station;
• a decoding unit which decodes the first data;
• a receiving unit, when the first data does not satisfy a predetermined quality, which receives first data transmitted from an another communication apparatus;
• a decoding unit which decodes a first signal transmitted from the another communication apparatus;
• and
• a transmitting unit which transmits the first data and first data transmitted by the another communication apparatus.

A communication apparatus, comprising:

• a receiving unit which receives first data transmitted from a mobile station;
• a decoding unit which decodes the first data;
• a receiving unit, when the first data does not satisfy a predetermined quality, which receives first data transmitted by an another communication apparatus;
• a decoding unit which decodes the first data transmitted from the different communication apparatus;
• and
• a transmitting unit which transmits the first data and the first data transmitted from the another communication apparatus.

A communication method in a communication apparatus for relaying data, comprising:

• receiving first data;
• receiving first data transmitted from an another communication apparatus when the first data does not satisfy a predetermined quality;
• and
• transmitting the first data received from the another communication apparatus.

A communication method comprising:

• transmitting first data from a base station to a first relay station and a second relay station;
• receiving the first data by the first relay station and the second relay station;
• determining the quality of the first data received by the first relay station;
• determining the quality of the first data received by the second relay station;
• waiting without issuing a retransmission request to the base station when the first data does not satisfy a predetermined quality in the first relay station;
• transmitting the first data to the first relay station and a terminal when the first data satisfies a predetermined quality in the second relay station;
• and
• transmitting the first data to the terminal when the first relay station receives the first data.

A communication system comprising:

• a base station;
• a first relay station;
• a second relay station;
• and
• a terminal,
• wherein the base station transmits first data to the first relay station and the second relay station,
• wherein the first relay station and the second relay station receive the first data transmitted from the base station,
• wherein the first relay station and the second relay station decode the first data transmitted from the base station,
• wherein, when the first data received from the base station does not satisfy a predetermined quality in the first relay station, the first relay station waits without issuing a retransmission request to the base station,
• wherein, when the first data transmitted from the base station satisfies a predetermined quality in the second relay station, the second relay station transmits to the first relay station and the terminal the first data transmitted from the base station,
• wherein the first relay station receives the first data transmitted from the second relay station,
• wherein the first relay station decodes the first data transmitted from the second relay station,
• wherein, when the first data transmitted from the second relay station satisfies a predetermined quality in the first relay station, the first relay station generates first data based on the first data transmitted from the second relay station and the first data transmitted from the base station;
• wherein the first relay terminal transmits the first data to the terminal,
• wherein the terminal receives, through the second relay station, the first data transmitted from the base station;
• wherein the terminal receives the first data from the first relay station,
• wherein the terminal decodes the first data transmitted from the base station through the second relay station, and
• wherein the terminal decodes the first data received from the first relay station.

A wireless communication apparatus for relaying a signal, comprising:

• a receiving unit which receives a signal;
• a transmission signal generating unit which generates a transmission signal based on at least one of a first signal received by the receiving unit and a relay signal for the first signal;
• a transmitting unit which transmits a signal;
• and
• a determination unit, which issues an instruction to the receiving unit to receive a relay signal for the first signal when the transmission signal does not satisfy a predetermined reception quality, or which issues an instruction to the transmitting unit to transmit the transmission signal when the transmission signal satisfies the predetermined reception signal quality.