Media access control

1. A method, comprising:

monitoring a first value indicative of a relative occupancy of a wireless channel at least partly arranged in an open spectrum, the relative occupancy is determined based on a time evolution of a signal level on the wireless channel during a predefined first time period;

monitoring a second value that represents a signal energy including a combination of noise added with signal transmissions on the wireless channel at least partly arranged in the open spectrum during a predefined second time period at least partly different from the predefined first time period, and

determining whether both the first value fulfills a first requirement during the predefined first time period and the second value fulfills a second requirement during the predefined second time period and at a different time than the first value fulfills the first requirement, and

selectively initiating a data transmission via the wireless channel based on the determination of whether both the first value fulfills the first requirement during the predefined first time period and the second value fulfills the second requirement during the predefined second time period and at a different time than the first value fulfills the first requirement.

2. The method according to claim 1 , wherein the predefined first time period is longer than the predefined second time period and/or wherein the predefined first time period is arranged prior to the predefined second time period.

3. The method according to claim 1 ,

wherein said monitoring of the second value is selectively executed based on determining that the first value fulfills the first requirement.

4. The method according to claim 1 , further comprising:

determining a plurality of signal level values on the wireless channel over a predefined first time period,

determining a number of those signal level values of the plurality of signal level values that are above a predefined threshold value, and

determining the first value indicative of the relative occupancy based on the number of signal level values above the predefined threshold value and a total number of the determined plurality of signal level values.

5. The method according to claim 1 , further comprising:

determining a plurality of signal quality values of subsequent signal transmissions received from the remote communication device via the wireless channel, and

determining the first value indicative of the signal quality based on a combination of the plurality of signal quality values.

6. The method according to claim 5 , wherein each signal quality value of the plurality of signal quality values comprises at least one of:

a signal to noise ratio of a respective signal transmission of the subsequent signal transmissions, and

a received signal strength of a respective signal transmission of the subsequent signal transmissions.

7. The method according to claim 5 ,

wherein each one of the subsequent signal transmissions comprises at least one reference symbol.

8. The method according to claim 1 ,

determining the first value indicative of the signal quality based on a change of the signal quality of the signal received from the remote communication device compared to historical signal qualities of further signals received from the remote communication device.

9. The method according to claim 1 ,

wherein the data transmission is initiated if the monitored signal level is always below a predefined threshold value during a predefined second time period.

10. A communication device for a wireless communication network, the communication device comprising:

at least one transceiver for communicating data via a wireless channel between the communication device and a remote communication device of the wireless communication network, wherein the wireless channel is at least partly arranged in an open spectrum; and

a control unit configured to

monitor a first value indicative of a relative occupancy of the wireless channel at least partly arranged in the open spectrum, determined based on a time evolution of a signal level on the wireless channel during a predefined first time period, and

monitor a second value that represents a signal energy including a combination of noise added with signal transmissions on the wireless channel at least partly arranged in the open spectrum during a predefined second time period at least partly different form the first predefined first time period,

determine whether both the first value fulfills the first requirement during the predefined first time period and the second value fulfills a second requirement during the predefined second time period and at a different time than the first value fulfills the first requirement, and

selectively initiate a data transmission via the wireless channel based on the determination of whether both the first value fulfills the first requirement during the predefined first time period and the second value fulfills the second requirement during the predefined second time period and at a different time than the first value fulfills the first requirement.

11. The communication device of claim 10 ,

wherein said monitoring of the second value is selectively executed based on determining that the first value fulfills the first requirement.