Method and apparatus for transmitting and receiving data multiple times in consecutive subframes
The present invention provides a method and apparatus for transmitting data and a method and apparatus for receiving data, wherein said methods transmit/receive a reference signal in sub-frames bundled for data transmission/reception using at least an identical precoding matrix, an identical reference signal sequence, an identical reference signal generating identifier, or an identical reference signal scrambling sequence.
1. A method for transmitting data by a transmitting device, the method comprising:
applying, by the transmitting device, a redundancy version (RV) to the data;
scrambling, by the transmitting device, the data; and
transmitting, by the transmitting device, the data multiple times in N consecutive subframes, where N is a positive integer greater than 1,
wherein the data is transmitted more than once over R consecutive subframes in the N consecutive subframes, and the RV applied to the data is same over the R consecutive subframes, where R is a predefined positive integer greater than 1,
wherein the RV applied to the data is changed every R consecutive subframes in the N consecutive subframes, where N is greater than R, and
wherein the data is scrambled with a same scrambling sequence over the R consecutive subframes for which the RV applied to the data stays the same.
2. The method according to claim 1 , further comprising:
precoding, by the transmitting device, the data,
wherein the data is precoded using a same precoding matrix across P consecutive subframes within the N consecutive subframes, where P is a positive integer configured by the transmitting device.
3. A method for receiving data by a receiving device, the method comprising:
receiving, by the receiving device, the data multiple times in N consecutive subframes, where N is a positive integer greater than 1; and
decoding, by the receiving device, the multiple times received data based on one or more redundancy versions (RVs) for the data and one or more scrambling sequences for the data,
wherein the data is received more than once over R consecutive subframes in the N consecutive subframes, and the data is decoded using a same RV over the R consecutive subframes, where R is a predefined positive integer greater than 1,
wherein the RV used for the data is changed every R consecutive subframes in the N consecutive subframes, where N is greater than R, and
wherein the data is decoded using a same scrambling sequence over the R consecutive subframes for which the RV used for the data stays the same.
4. The method according to claim 3 , further comprising:
receiving, by the receiving device, the data using a same precoding matrix across P consecutive subframes within the N consecutive subframes, where P is a positive integer configured by a transmitting device.
5. A transmitting device for transmitting data, the transmitting device comprising:
a radio frequency (RF) unit; and
a processor configured to:
apply a redundancy version (RV) to the data;
scramble the data; and
control the RF unit to transmit the data multiple times in N consecutive subframes, where N is a positive integer greater than 1,
wherein the data is transmitted more than once over R consecutive subframes in the N consecutive subframes, and the RV applied to the data is same over the R consecutive subframes, where R is a predefined positive integer greater than 1, and
wherein the RV applied to the data is changed every R consecutive subframes in the N consecutive subframes, where N is greater than R, and
wherein the processor is configured to scramble the data with a same scrambling sequence over the R consecutive subframes for which the RV applied to the data stays the same.
6. The transmitting device according to claim 5 ,
wherein the processor is configured to precode the data using a same precoding matrix across P consecutive subframes within the N consecutive subframes, where P is a positive integer configured by the transmitting device.
7. A receiving device for receiving data, the receiving device comprising:
a radio frequency (RF) unit; and
a processor configured to:
control the RF unit to receive the data multiple times in N consecutive subframes, where N is a positive integer greater than 1, and
decode the multiple times received data based on one or more redundancy versions (RVs) for the data and one or more scrambling sequences for the data,
wherein the data is received more than once over R consecutive subframes in the N consecutive subframes, and the data is decoded using a same RV over the R consecutive subframes, where R is a predefined positive integer greater than 1,
wherein the RV used for the data is changed every R consecutive subframes in the N consecutive subframes, where N is greater than R, and
wherein the data is decoded using a same scrambling sequence over the R consecutive subframes for which the RV used for the data stays the same.
8. The receiving device according to claim 7 ,
wherein the data is received using a same precoding matrix across P consecutive subframes within the N consecutive subframes, where P is a positive integer configured by a transmitting device.
9. The method according to claim 1 , further comprising:
scrambling, by the transmitting device, the data with a different scrambling sequence for a subframe, in which a different RV is applied to the data, in the N consecutive subframes.
10. The method according to claim 2 ,
wherein the data is transmitted using a same resource block within the P consecutive subframes.
11. The method according to claim 2 , further comprising:
precoding, by the transmitting device, the data using a different precoding matrix for a subframe other than the P consecutive subframes.
12. The method according to claim 3 ,
wherein the data is decoded using a different scrambling sequence for a subframe, in which a different RV is applied to the data, in the N consecutive subframes.
13. The method according to claim 4 ,
wherein the data is received using a same resource block within the P consecutive subframes.
14. The method according to claim 4 ,
wherein the data is decoded using a different precoding matrix for a subframe other than the P consecutive subframes.
15. The transmitting device according to claim 5 ,
wherein the processor is configured to scramble the data with a different scrambling sequence for a subframe, in which a different RV is applied to the data, in the N consecutive subframes.
16. The transmitting device according to claim 6 ,
wherein the processor is configured to control the RF unit to transmit the data using a same resource block within the P consecutive subframes.
17. The transmitting device according to claim 6 ,
wherein the processor is configured to precode the data using a different precoding matrix for a subframe other than the P consecutive subframes.
18. The receiving device according to claim 7 ,
wherein the processor is configured to decode the data using a different scrambling sequence for a subframe, in which a different RV is applied to the data, in the N consecutive subframes.
19. The receiving device according to claim 8 ,
wherein the processor is configured to control the RF unit to receive the data using a same resource block within the P consecutive subframes.
20. The receiving device according to claim 8 ,
wherein the processor is configured to decode the data using a different precoding matrix for a subframe other than the P consecutive subframes.