Method and apparatus for transmitting adaptive partial subframe in unlicensed frequency band, method and apparatus for identifying a frame structure, and method and apparatus for transmitting signal
There is provided a method for transmitting, by a transmitter, a signal through an unlicensed band channel. The transmitter transmits an initial signal through the unlicensed band channel to preoccupy the unlicensed band channel when the unlicensed band channel is in an idle status. The transmitter includes a first partial subframe transmitted after the initial signal in a frame burst depending to transmission timing of the initial signal. Further, the transmitter transmits the frame burst through the unlicensed band channel.
1. A transmission method for a transmitter, the method comprising:
performing clear channel assessment (CCA) for occupying an unlicensed band; and
after the unlicensed band is determined to be idle as a result of the CCA, transmitting first configuration information through a control channel included in a partial subframe being shorter than a full subframe and transmitting data through a data channel included in the partial subframe,
wherein the first configuration information indicates a number of symbols occupied in a next subframe following the partial subframe.
2. The method of claim 1 , further comprising:
transmitting second configuration information through a control channel included in the next subframe and transmitting data through a data channel included in the next subframe, wherein the second configuration information indicates a number of symbols occupied in the next subframe.
3. The method of claim 2 , wherein the next subframe is the full subframe.
4. The method of claim 2 , wherein the next subframe is an ending partial subframe.
5. The method of claim 4 , wherein a time length of the ending partial subframe is the same as a time length of a downlink pilot time slot (DwPTS) of a long-term evolution (LTE) system.
6. The method of claim 4 , wherein the time length of the ending partial subframe is one of 3, 6, 9, 10, 11, and 12 symbol length.
7. The method of claim 1 , further comprising:
transmitting second configuration information through a control channel included in the next subframe and transmitting data through a data channel included in the next subframe, wherein the next subframe is the full subframe and the second configuration information indicates a number of symbols occupied in an ending partial subframe following the next subframe.
8. The method of claim 1 , further comprising:
transmitting second configuration information through a control channel included in the next subframe and transmitting data through a data channel included in the next subframe, wherein the next subframe is a first full subframe after the partial subframe and the second configuration information indicates a number of symbols occupied in a second full subframe following the first full subframe.
9. The method of claim 1 , wherein the first configuration information consists of 4 bits.
10. The method of claim 1 , further comprising:
transmitting a reservation signal for preventing other devices from occupying the unlicensed band when the unlicensed band is determined to be idle as a result of the CCA before the partial subframe is transmitted.
11. The method of claim 10 , wherein a time length of the reservation signal is 16 samples.
12. A reception method performed through an unlicensed band by a receiver, the method comprising:
receiving a reference signal from a transmitter after the unlicensed band is determined to be idle; and
receiving first configuration information through a control channel included in a partial subframe being shorter than a full subframe and receiving data through a data channel included in the partial subframe,
wherein the first configuration information indicates a number of symbols occupied in a next subframe following the partial subframe.
13. The method of claim 12 , further comprising:
receiving second configuration information through a control channel included in the next subframe and receiving data through a data channel included in the next subframe, wherein the second configuration information indicates a number of symbols occupied in the next subframe.
14. The method of claim 13 , wherein the next subframe is the full subframe.
15. The method of claim 13 , wherein the next subframe is an ending partial subframe.
16. The method of claim 15 , wherein a time length of the ending partial subframe is the same as a time length of a downlink pilot time slot (DwPTS) of a long-term evolution (LTE) system.
17. The method of claim 15 , wherein the time length of the ending partial subframe is one of 3, 6, 9, 10, 11, and 12 symbol length.
18. The method of claim 13 , further comprising:
receiving second configuration information through a control channel included in the next subframe and receiving data through a data channel included in the next subframe, wherein the next subframe is the full subframe and the second configuration information indicates a number of symbols occupied in an ending partial subframe following the next subframe.
19. The method of claim 13 , further comprising:
receiving second configuration information through a control channel included in the next subframe and receiving data through a data channel included in the next subframe, wherein the next subframe is a first full subframe after the partial subframe and the second configuration information indicates a number of symbols occupied in a second full subframe following the first full subframe.
20. The method of claim 13 , wherein the first configuration information consists of 4 bits.
21. The method of claim 13 ,
wherein the reference signal is received for preventing other devices from occupying the unlicensed band when the unlicensed band is determined to be idle before the partial subframe is transmitted from the transmitter.
22. The method of claim 21 , wherein a time length of the reference signal is 16 samples.