Communication device

1. A method for transmitting signals on a transmission channel, comprising:

detecting a channel occupancy of a transmission channel by processing data from a receiving path after an activation of a transmission path, wherein the channel occupancy is detected based on the received power on the transmission channel in a sequence of time windows, and wherein the received power is evaluated on an average power or a peak power within the sequence of time windows; and

deactivating the transmission path based on the detected channel occupancy.

2. The method of claim 1 , wherein the length of the time window is shorter than a delay in the receiving path.

3. The method of claim 1 , wherein the time window is adjustable.

4. The method of claim 3 , wherein a length of the time window is adjusted based on the characteristics of the transmission channel.

5. The method of claim 1 , wherein the activation of a transmission path comprises an activation of a power amplifier in the transmission path.

6. The method of claim 1 , wherein the deactivation of a transmission path comprises a deactivation of a power amplifier in the transmission path.

7. The method of claim 1 , wherein the transmission channel comprises:

a channel within an unlicensed band comprising a Wi-Fi channel, a Long-Term Evolution (LTE) channel in an unlicensed spectrum, or an License-Assisted Access via LTE (LAA-LTE) channel; or

a channel within a licensed band comprising an LTE channel, an UMTS channel or a GSM channel.

8. The method of claim 1 , wherein the data is processed within a predetermined time period after the activation of the transmission path.

9. A communication device for transmitting signals on a transmission channel, comprising:

processing circuitry;

memory containing instructions executable by the processing circuitry whereby the communication device is operative to:

detect a channel occupancy of the transmission channel by processing data from a receiving path after an activation of a transmission path, wherein the channel occupancy is detected based on received power on the transmission channel in a sequence of time windows, and wherein the received power is evaluated on an average power or a peak power within the sequence of time windows; and

deactivate the transmission path based on the detected channel occupancy.

10. The communication device of claim 9 , wherein the length of the time window is shorter than a delay in the receiving path.

11. The communication device of claim 9 , wherein the instructions are such that the communication device is operative to adjust the time window.

12. The communication device of claim 11 , wherein the instructions are such that the communication device is operative to adjust a length of the time window based on the characteristics of the transmission channel.

13. The communication device of claim 9 , wherein the activation of a transmission path comprises an activation of a power amplifier in the transmission path.

14. The communication device of claim 9 , wherein the deactivation of a transmission path comprises a deactivation of a power amplifier in the transmission path.

15. The communication device of claim 9 , wherein the communication device is a user equipment, a base station, or machine-type communication device.

16. The communication device of claim 9 , wherein the instructions are such that the communication device is operative to process the data within a predetermined time period after the activation of the transmission path.

17. A non-transitory computer readable recording medium storing a computer program product for controlling communication device for transmitting signals on a transmission channel, the computer program product comprising software instructions which, when run on processing circuitry of the communication device, causes the communication device to:

detect a channel occupancy of a transmission channel by processing data from a receiving path after an activation of a transmission path, wherein the channel occupancy is detected based on the received power on the transmission channel in a sequence of time windows, and wherein the received power is evaluated on an average power or a peak power within the sequence of time windows; and

deactivate the transmission path based on the detected channel occupancy.