Transmitter device, receiver device and methods thereof
Embodiments relate to a transmitter device and a receiver device. The transmitter device comprises a processer configured to: map at least one first signal to a first subframe, map at least one second signal to a second subframe having a variable time offset in relation to the first subframe; and a transceiver configured to transmit the first signal in the first subframe, transmit the second signal in the second subframe. The receiver device comprises a receiving device configured to receive a first signal transmitted in a first subframe, and receive a second signal transmitted in a second subframe having a variable time offset in relation to the first subframe; and a processor configured to process the received first signal, and process the received second signal. Furthermore, the embodiments also relate to corresponding methods, a computer program, and a computer program product.
1. A transmitter device, comprising:
a processor;
a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
mapping a first signal to a first subframe; and
mapping a second signal to a second subframe, the second subframe having a variable time offset in relation to the first subframe, wherein the variable time offset is less than or equal to a time duration of a subframe, and wherein a start of the second subframe is determined according to a Clear Channel Assessment (CCA) outcome; and
a transceiver, configured to:
transmit the first signal in the first subframe; and
transmit the second signal in the second subframe.
2. The transmitter device according to claim 1 , wherein the first subframe and the second subframe have a same time duration.
3. The transmitter device according to claim 1 , wherein a start point of the second subframe is derived from a point in time in which the transmitter device starts transmission of a physical channel or a signal.
4. The transmitter device according to claim 1 , wherein the first signal and the second signal comprise different physical channels or signals.
5. The transmitter device according to claim 1 , wherein the first signal comprises a discovery signal.
6. The transmitter device according to claim 1 , wherein the second signal comprises a data channel, or the data channel and a user device specific reference signal.
7. The transmitter device according to claim 6 , wherein the second signal further comprises a cell specific reference signal or a channel state information reference signal.
8. The transmitter device according to claim 1 , wherein the variable time offset between the first subframe and the second subframe is an integer number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, or from 0 to N−1 OFDM symbols, or from a subset of 0 to N−1 OFDM symbols, wherein N is the number of OFDM symbols in the first subframe.
9. The transmitter device according to claim 1 , wherein the second signal is not transmitted when a collision occurs between the first signal and the second signal.
10. The transmitter device according to claim 1 , wherein a second subframe number for the second subframe is derived from a first subframe number for the first subframe, wherein the first subframe and the second subframe overlap.
11. The transmitter device according to claim 1 , wherein the first subframe has a fixed start point and a fixed end point in time.
12. A receiver device, comprising:
a receiver, configured to:
receive a first signal transmitted in a first subframe; and
receive a second signal transmitted in a second subframe, the second subframe having a variable time offset in relation to the first subframe, wherein the variable time offset is less than or equal to a time duration of a subframe, and wherein a start of the second subframe has been determined according to a Clear Channel Assessment (CCA) outcome;
a processor; and
a computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
processing the received first signal; and
processing the received second signal.
13. A method, comprising:
mapping a first signal to a first subframe;
mapping a second signal to a second subframe, the second subframe having a variable time offset in relation to the first subframe, wherein the variable time offset is less than or equal to a time duration of a subframe, and wherein a start of the second subframe is determined according to a Clear Channel Assessment (CCA) outcome;
transmitting the first signal in the first subframe; and
transmitting the second signal in the second subframe.
14. The method according to claim 13 , wherein the first subframe and the second subframe have a same time duration.
15. The method according to claim 13 , wherein the method is performed by a transmitter device, and a start point of the second subframe is derived from a point in time in which the transmitter device starts transmission of a physical channel or a signal.
16. The method according to claim 13 , wherein the first signal and the second signal comprise different physical channels or signals.
17. The method according to claim 13 , wherein the first signal comprises a discovery signal.
18. A non-transitory computer-readable medium storing computer executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method of claim 13 .
19. A method, comprising:
receiving a first signal transmitted in a first subframe;
receiving a second signal transmitted in a second subframe, the second subframe having a variable time offset in relation to the first subframe, wherein the variable time offset is less than or equal to a time duration of a subframe, and wherein a start of the second subframe has been determined according to a Clear Channel Assessment (CCA) outcome;
processing the received first signal; and
processing the received second signal.
20. A non-transitory computer-readable medium storing computer executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method of claim 19 .