Communication techniques based on adaptive numerology

1. A mobile communication device comprising:

a receiver configured to receive a radio signal over a radio channel, the radio signal comprising a predetermined pilot preamble; and

a processor configured to determine mobility information based on the pilot preamble, the mobility information comprising a Doppler spread and/or a delay spread,

wherein the processor is further configured to signal the mobility information to a second communication device, and

wherein the mobility information comprises the Doppler spread and the delay spread,

wherein the Doppler spread and/or the delay spread are based on outer loop processing, and

wherein the outer loop processing is configured to be performed at a lower rate than a rate used for link adaptation between the mobile communication device and the second communication device.

2. The mobile communication device of claim 1 , wherein the processor is configured to determine a pilot of a first type of pilots, which is configured to be used for channel estimation, and a pilot of a second type of pilots, wherein the pilot of the second type of pilots is configured to be used for the determination of the mobility information.

3. The mobile communication device of claim 2 , wherein the first type of pilots are periodic with a radio subframe and the second type of pilots are periodic with at least multiples of a radioframe of multiple subframes.

4. The mobile communication device of claim 1 , wherein the processor is configured to signal the mobility information to the second communication device that comprises:

a base station in a cellular vehicle-to-anything scenario; or

a mobile communication device in a vehicle-to-vehicle scenario for a sidelink.

5. A base station comprising:

a receiver configured to receive mobility information signaled by a mobile communication device, the mobility information comprising a Doppler spread and/or a delay spread; and

a processor configured to:

select a numerology based on the mobility information and to generate a radio signal for transmission to the mobile communication device based on the numerology, and

wherein the selecting the numerology based on the mobility information comprises selecting the numerology based on the mobility information and a quality-of-service requirement.

6. The base station of claim 5 , wherein the numerology is based on at least one of the following parameters based on the mobility information:

a subcarrier spacing,

a length of cyclic prefix,

a pilot distribution, or

a transmission time interval.

7. The base station of claim 5 , wherein the processor is configured:

to select a numerology for a sidelink communication of the mobile communication device based on mobility information received for the sidelink, and

to select a numerology for a central communication link of the mobile communication device with the base station based on mobility information received for the central communication link.

8. The base station of claim 5 , wherein the processor is configured to perform an outer loop processing comprising the numerology selection and/or a numerology configuration, and

wherein the outer loop processing is performed at a lower rate than a rate used for link adaptation between the base station and the mobile communication device.

9. The base station of claim 8 , wherein the processor is configured to re-configure a radio bearer to different time-frequency resources having a numerology based on the mobility information.

10. The base station of claim 5 , comprising a shared hybrid automatic repeat request (HARQ) entity across different numerologies,

wherein the processor is configured to trigger each HARQ redundancy versions based on the mobility information to a different numerology of the different numerologies.

11. The base station of claim 5 , wherein the processor is configured to select the numerology for at least one component carrier transmitting the radio signal.

12. The base station of claim 5 , wherein the processor is configured to insert a predetermined pilot preamble into the radio signal, wherein the pilot preamble is configured to determine channel conditions, in particular the Doppler spread and/or the delay spread.

13. A mobility information sending method for a communication device, the method comprising:

receiving a radio signal over a radio channel, the radio signal comprising a predetermined pilot preamble;

determining mobility information based on the pilot preamble, the mobility information comprising a Doppler spread and/or a delay spread; and

sending the mobility information to a second communication device, and

wherein the mobility information comprises the Doppler spread and the delay spread,

wherein the Doppler spread and/or the delay spread are provided based on outer loop processing, and

wherein the outer loop processing is performed at a lower rate than a rate used for link adaptation between the communication device and the second communication device.

14. The method of claim 13 , the method further comprising determining a pilot of a first type of pilots, which is used for channel estimation, and a pilot of a second type of pilots for the determination of the mobility information.

15. The method of claim 14 , wherein the first type of pilots are periodic with a radio subframe and the second type of pilots are periodic with at least multiples of a radioframe of multiple subframes.

16. The method of claim 13 , wherein the second communication device comprises:

a base station in a cellular vehicle-to-anything scenario; or

a mobile communication device in a vehicle-to-vehicle scenario for a sidelink.

17. A mobility information receiving method for a base station, the method comprising:

receiving mobility information signaled by a mobile communication device, the mobility information comprising a Doppler spread and/or a delay spread;

selecting a numerology based on the mobility information; and

generating a radio signal for transmission to the mobile communication device based on the numerology, and

wherein the selecting the numerology based on the mobility information comprises selecting the numerology based on the mobility information and a quality-of-service requirement.

18. The method of claim 17 , wherein the numerology is based on at least one of the following parameters based on the mobility information:

a subcarrier spacing,

a length of cyclic prefix,

a pilot distribution, or

a transmission time interval.

19. The method of claim 17 , the method further comprising:

selecting a numerology for a sidelink communication of the mobile communication device based on mobility information received for the sidelink; and

selecting a numerology for a central communication link of the mobile communication device with the base station based on mobility information received for the central communication link.

20. The method of claim 17 , the method further comprising performing an outer loop processing comprising the numerology selection and/or a numerology configuration, wherein the outer loop processing is performed at a lower rate than a rate used for link adaptation between the base station and the mobile communication device.

21. The method of claim 20 , the method further comprising re-configuring a radio bearer to different time-frequency resources having a numerology based on the mobility information.

22. The method of claim 17 , the method further comprising triggering each of a shared hybrid automatic repeat request (HARQ) redundancy versions based on the mobility information to a different numerology.

23. The method of claim 17 , the method further comprising selecting the numerology for at least one component carrier transmitting the radio signal.

24. The method of claim 17 , the method further comprising inserting a predetermined pilot preamble into the radio signal, wherein the pilot preamble is configured to determine channel conditions, in particular the Doppler spread and/or the delay spread.