Oscillator arrangement, method, computer program and communication device

1. A reference oscillator arrangement, for a communication apparatus capable of communicating according to a plurality of transport formats, the reference oscillator arrangement comprising:

a reference oscillator controller;

a resonator core comprising a reference resonator and a driving circuit for the reference resonator, wherein the resonator core is configured to provide an oscillating signal at a frequency of the reference resonator;

a reference oscillator buffer arrangement connected to the resonator core, the reference oscillator buffer arrangement comprising an active circuit configured to provide a reference oscillator output based on the oscillating signal; and

wherein the reference oscillator controller is configured to:

receive information about an applied transport format, wherein the applied transport format is an applied format for transmission of information which both the transmitter at a transmitting side and a receiver at a receiving side use; and

control the driving circuit and/or the active circuit based on the information about the applied transport format.

2. The reference oscillator arrangement of claim 1 , wherein the reference resonator is a crystal resonator or a microelectromechanical system (MEMS) resonator.

3. The reference oscillator arrangement of claim 1 , wherein the reference oscillator controller is configured to perform the control by controlling bias of the driving circuit and/or the active circuit.

4. The reference oscillator arrangement of claim 1 , wherein the reference oscillator buffer arrangement comprises a plurality of buffers for providing output signals to different circuits of the communication apparatus, each buffer comprising an active circuit, wherein the active circuits of at least a set of the buffers are individually controllable.

5. The reference oscillator arrangement of claim 1 , wherein the reference oscillator controller comprises a look-up table configured to map transport formats to control settings of the driving circuit and/or the active circuit.

6. The reference oscillator arrangement of claim 1 , wherein the reference oscillator controller is configured to control by adjusting the driving circuit once for a transmission burst of the communication apparatus.

7. The reference oscillator arrangement of claim 1 , wherein the reference oscillator controller is configured to control by adjusting the active circuit at a plurality of instances during a transmission burst of the communication apparatus.

8. The reference oscillator arrangement of claim 1 , wherein the applied transport format is related to communications over a wireless channel.

9. An oscillator arrangement, for a communication apparatus capable of communicating according to a plurality of transport formats, the oscillator arrangement comprising:

a reference oscillator arrangement, the reference oscillator arrangement comprising:

a reference oscillator controller;

a resonator core comprising a reference resonator and a driving circuit for the reference resonator, wherein the resonator core is configured to provide an oscillating signal at a frequency of the reference resonator;

a reference oscillator buffer arrangement connected to the resonator core, the reference oscillator buffer arrangement comprising an active circuit configured to provide a reference oscillator output based on the oscillating signal;

wherein the reference oscillator controller is configured to:

receive information about an applied transport format, wherein the applied transport format is an applied format for transmission of information which both the transmitter at a transmitting side and a receiver at a receiving side use; and

control the driving circuit and/or the active circuit based on the information about the applied transport format; and

wherein the reference oscillator arrangement is capable of adjusting phase noise of the generated reference oscillator output; and

a phase-locked loop circuit comprising a phase detector configured to receive an output signal from the reference oscillator arrangement.

10. The oscillator arrangement of claim 9 , wherein the phase-locked loop circuit is configured to adjust a loop bandwidth of a phase-locked loop thereof such that:

an increase in phase noise of the generated reference oscillator output implies a decrease in loop bandwidth; and

a decrease in phase noise of the generated reference oscillator output implies an increase in loop bandwidth.

11. The oscillator arrangement of claim 9 :

wherein the phase-locked loop circuit further comprises a controlled oscillator which is configured to:

provide an oscillator signal based on a filtered output from the phase detector; and

receive different settings from the reference oscillator controller for providing different levels of phase noise such that:

an increase in phase noise of the generated reference oscillator output implies an increase in phase noise of the controlled oscillator; and

a decrease in phase noise of the generated reference oscillator output causes a decrease in phase noise of the controlled oscillator.

12. The oscillator arrangement of claim 9 , wherein the reference oscillator arrangement is configured to be controlled such that:

a decrease in a loop bandwidth of a phase-locked loop of the phase-locked loop circuit implies an increase in phase noise of the generated reference oscillator output; and

an increase in the loop bandwidth implies a decrease in phase noise of the generated reference oscillator output.

13. A method of controlling an oscillator arrangement for a communication apparatus capable of communicating according to a plurality of transport formats, wherein the method comprises:

providing an oscillating signal at a frequency of a reference resonator of a resonator core, the resonator core comprising the reference resonator and a driving circuit for the reference resonator;

providing, by a reference oscillator buffer arrangement connected to the resonator core, a reference oscillator output based on the oscillating signal; the reference oscillator buffer arrangement comprising an active circuit configured to provide reference oscillator output based on the oscillating signal;

receiving information about an applied transport format, wherein the applied transport format is an applied format for transmission of information which both the transmitter at a transmitting side and a receiver at a receiving side use; and

controlling the driving circuit and/or the active circuit based on the information about the applied transport format.

14. The method of claim 13 , wherein the controlling comprises controlling bias of the driving circuit and/or the active circuit.

15. The method of claim 13 :

wherein the reference oscillator buffer arrangement comprises a plurality of buffers for providing output signals to different circuits of the communication apparatus, each buffer comprising an active circuit; and

wherein the method comprises controlling active circuits of at least a set of the buffers individually.

16. The method of claim 13 , further comprising controlling settings of the driving circuit and/or the active circuit by mapping transport formats to control settings from a look-up table.

17. The method of claim 13 , further comprising controlling the driving circuit to adjust once for a transmission burst of the communication apparatus.

18. The method of claim 13 , further comprising controlling the active circuit to adjust at a plurality of instances during a transmission burst of the communication apparatus.

19. The method of claim 13 :

wherein the oscillator arrangement further comprises a phase-locked loop circuit comprising a phase detector configured to receive an output signal from a reference oscillator arrangement; and

wherein the method further comprises adjusting a loop bandwidth of a phase-locked loop of the phase-locked loop circuit such that:

an increase in phase noise of the generated reference oscillator output implies a decrease in loop bandwidth; and

a decrease in phase noise of the generated reference oscillator output implies an increase in loop bandwidth.

20. The method of claims 13 :

wherein the oscillator arrangement comprises a phase-locked loop circuit comprising a phase detector configured to receive an output signal from a reference oscillator arrangement;

wherein the phase-locked loop circuit comprises a controlled oscillator which is configured to provide an oscillator signal based on a filtered output from the phase detector;

wherein the controlled oscillator is configured to receive different settings from the reference oscillator controller for providing different levels of phase noise; and

wherein the method further comprises controlling the controlled oscillator such that:

an increase in phase noise of the generated reference oscillator output implies an increase in phase noise of the controlled oscillator; and

a decrease in phase noise of the generated reference oscillator output implies a decrease in phase noise of the controlled oscillator.

21. The method of claim 13 :

wherein the oscillator arrangement comprises a phase-locked loop circuit and a reference oscillator arrangement;

wherein the reference oscillator arrangement comprises the reference resonator core and the reference buffer arrangement; and

wherein the method comprises controlling the reference oscillator arrangement such that:

an increase in a loop bandwidth of the phase-locked loop circuit implies a decrease in phase noise of the generated reference oscillator output; and

a decrease in the loop bandwidth implies an increase in phase noise of the generated reference oscillator output.

22. A communication device for operating with a radio access network and capable of communicating according to a plurality of transport formats, the communication device comprising:

a transceiver configured to transmit or receive one or more data messages over a wireless channel; and

a reference oscillator arrangement, the reference oscillator arrangement comprising:

a reference oscillator controller;

a resonator core comprising a reference resonator and a driving circuit for the reference resonator, wherein the resonator core is configured to provide an oscillating signal at a frequency of the reference resonator;

a reference oscillator buffer arrangement connected to the resonator core, the reference oscillator buffer arrangement comprising an active circuit configured to provide a reference oscillator output based on the oscillating signal; and

wherein the reference oscillator controller is configured to:

receive information about an applied transport format, wherein the applied transport format is an applied format for transmission of information which both the transmitter at a transmitting side and a receiver at a receiving side use; and

control the driving circuit and/or the active circuit based on the information about the applied transport format.