2.5.
EP 536 bevat in de oorspronkelijke Engelse taal de volgende conclusies:
1. A method of transmitting data in a radio system from a transmitter to a receiver, the method comprising:
(502) channel coding a data block into a coded data black by using a selected channel coding;
(504) puncturing the coded data black by using a first puncturing pattern;
(506) transmitting the coded data black punctured by the first puncturing pattern to the receiver;
(508) detecting a need for retransmission of the received coded data block;
(510) transmitting a retransmission request of the coded data block to the transmitter;
(512) increasing the code rate of the coded data block to be retransmitted by puncturing the coded data black coded by the channel coding of the original transmission by using a second puncturing pattern comprising fewer symbols to be transmitted than the first puncturing pattern;
(514) transmitting the coded data black punctured by the second puncturing pattern to the receiver;
(516) combining the received coded data block punctured by the first puncturing pattern and the received coded data black punctured by the second puncturing pattern; and
(518) decoding the channel coding of the combined coded data block;
characterized by the combination of the modulation and coding schemes used in EGPRS in an original
transmission and in a retransmission being one of the following:
- modulation and coding scheme six and modulation and coding scheme nine,
- modulation and coding scheme five and modulation and coding scheme seven, and
- modulation and coding scheme six using padding bits and modulation and coding scheme eight.
2. A method as claimed in claim 1, characterized by the symbols to be transmitted of the first puncturing pattern and the second puncturing pattern together comprising as many of the symbols of the coded data block as possible.
3. A method as claimed in claim 1, characterized by the code rateofthe punctured coded data block not exceeding 1.
4. A radio system comprising:
a transmitter (260) and a receiver (264) having a radio connection (240) to the transmitter (260);
the transmitter (260) comprising a channel coder (202) for channel coding a data block into a coded data block
by using a selected channel coding and for puncturing the coded data block by using a first puncturing pattern, and transmission means (204) for transmitting the coded data block punctured by the first puncturing pattern to the receiver (264);
the receiver (264) comprising a channel decoder (218) for decoding the received coded data block, means
(224) for detecting a need for retransmissionof thereceived coded data block, and means (226) fortransmitting
a retransmission request of the coded data block to the transmitter (260);
the channel coder (202) increases the code rate of the coded data block to be retransmitted by puncturing the coded data block coded by the channel coding of the original transmission by using a second puncturing pattern comprising fewer symbols to be transmitted than the first puncturing pattern;
the transmission means (204) transmit the coded data block punctured by the second puncturing pattern to
the receiver (264);
the receiver (264) comprises means (222) for combining a received coded data block (216) punctured by the first puncturing pattern and a received coded data block (220) punctured by the second puncturing pattern; the channel decoder (218) decodes the channel coding of the combined coded data black;
characterized in that the combination of the modulation and coding schemes used in EGPRS in an original transmission and in a retransmission is one of the following:
- modulation and coding scheme six and modulation and coding scheme nine,
- modulation and coding scheme five and modulation and coding scheme seven, and
- modulation and coding scheme six using padding bits and modulation and coding scheme eight.
5. A radio system as claimed in claim 4, characterized in that the symbols to be transmitted of the first puncturing pattern and the second puncturing pattern together comprise as many of the symbols of the coded data block as possible.
6. A radio system as claimed in claim 4, characterized in that the code rate of the punctured coded data block does not exceed 1.
7. A radio transmitter comprising:
a channel coder (202) for channel coding a data block into a coded data block by using a selected channel coding and for puncturing the coded data block by using a first puncturing pattern;
transmission means (204) for transmitting the coded data block punctured by the first puncturing pattern toa receiver; and
means (232, 234) for receiving a retransmission request of the coded data block;
the channel coder (202) increases the code rate of the coded data block to be retransmitted by puncturing the coded data block coded by the channel coding of the original transmission by using a second puncturing pattern comprising fewer symbols to be transmitted than the first puncturing pattern;
the transmission means (204) transmit the coded data block punctured by the second puncturing pattern to the receiver;
characterized in that the combination of the modulation and coding schemes used in EGPRS in an original transmission and in a retransmission is one of the following:
- modulation and coding scheme six and modulation and coding scheme nine,
- modulation and coding scheme five and modulation and coding scheme seven, and
- modulation and coding scheme six using padding bits and modulation and coding scheme eight.
8. A radio receiver comprising:
reception means (210) for receiving a coded data block channel-coded by a selected channel coding and punctured by a first puncturing pattern;
a channel decoder (218) for decoding the received coded data block;
means (224) for detecting a need for retransmission of the received coded data block; and
means (224, 226) for transmitting a retransmission request of the coded data block to a transmitter;
the reception means (210) receive the retransmitted coded data block whose code rate has been increased by puncturing the coded data block coded by the channel coding of the original transmission by using a second puncturing pattern comprising fewer symbols to be transmitted than the first puncturing pattern;
means (222) for combining the received coded data block punctured by the first puncturing pattern and the received coded data block punctured by the second puncturing pattern;
a channel decoder (218) decodes the channel coding of the combined coded data block;
characterized in that the combination of the modulation and coding schemes used in EGPRS in an original transmission and in a retransmission is one of the following:
- modulation and coding scheme six and modulation and coding scheme nine,
- modulation and coding scheme five and modulation and coding scheme seven, and
- modulation and coding scheme six using padding bits and modulation and coding scheme eight.