METHODS OF ELECTRONIC COMMUNICATION DEVICE AND NETWORK NODE, ELECTRONIC COMMUNICATION DEVICE, NETWORK NODE, AND COMPUTER PROGRAMS

• US 20180176828A1
• Filed: 07/30/2015
• Published: 06/21/2018
• Est. Priority Date: 07/30/2015
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Chen, Maomao, Nordstrom, Fredrik
• Granted Patent: US 10,440,613 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 1/0003 Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0613 using simultaneous transmission H04B7/0686 takes precedence
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 28/22 Negotiating communication rate

Abstract

A method of an electronic communication device is disclosed. The electronic communication device is arranged to operate in a radio communication system, wherein the radio communication system has capability of performing link adaptation by adapting one or more parameters of communication in view of a quality of a radio link between a network node of the radio communication system and the electronic communication device. The method comprises determining a link adaptation status for the electronic communication device, and transmitting information related to the determined link adaptation status to one or more network nodes of the radio communication system. A method of a network node, an electronic communication device, a network node, and computer programs are also disclosed.

Claims

1. :

A method of an electronic communication device arranged to operate in a radio communication system, wherein the radio communication system has capability of performing link adaptation by adapting one or more parameters of communication in view of a quality of a radio link between a network node of the radio communication system and the electronic communication device, the method comprising;

determining a link adaptation status for the electronic communication device; and

transmitting information related to the determined link adaptation status to one or more network nodes of the radio communication system.

2. :

The method of claim 1, wherein the link adaptation status includes information whether link adaptation is applied for the electronic communication device.

3. :

The method of claim 2, wherein the information whether link adaptation is applied for the electronic communication device is derived from signalling from a network node of the radio communication system to the electronic communication device, wherein the signalling comprises an indication whether link adaptation is allowed for the electronic communication device.

4. :

The method of claim 2, wherein the information whether link adaptation is applied for the electronic communication device is derived from determination whether targeted block error rate of communication deviates between the electronic communication device and a serving network node of the radio communication system and deviates from a predetermined default targeted block error rate, wherein no deviation calls for no link adaptation.

5. :

The method of claim 2, wherein the information whether link adaptation is applied for the electronic communication device is derived from one or more predefined communication scenario or condition.

6. :

The method of claim 1, wherein the link adaptation includes an outer loop link adaptation and the link adaptation status includes information about targeted block error rate used in link adaptation at the electronic communication device.

7. :

The method of claim 6, comprising;

estimating a maximum Doppler shift of signals on a physical channel between a serving network node of the radio communication system and the electronic communication device; and

determining the targeted block error rate taking into account the estimated maximum Doppler shift.

8. :

The method of claim 6, comprising

applying an automatic repeat request approach for communication between a serving network node of the radio communication system and the electronic communication device;

calculating a real time of block error rate determination of first attempt for transmissions of the automatic repeat request approach at a data decoder of the electronic communication device; and

determining the targeted block error rate taking into account the real time calculation.

9. :

The method of claim 6, comprising

estimating channel correlation among receive antenna ports; and

determining the targeted block error rate taking into account the estimated channel correlation.

10. :

The method of claim 6, wherein the determining of the targeted block error rate includes taking into account one or more predefined communication scenario or condition.

11. :

The method of claim 1, wherein the link adaptation includes an outer loop link adaptation and the link adaptation status includes information about outer loop link adaptation adjustment.

12. :

The method of claim 11, wherein the information about outer loop link adaptation adjustment comprises information about one or more elements used for link adaptation adjustments.

13. :

The method of claim 12, wherein the one or more elements reflects channel status.

14. :

The method of claim 11, wherein the information about outer loop link adaptation adjustment comprises a step size used for the outer loop link adaptation.

15. :

The method of claim 12, comprising

applying an automatic repeat request approach for communication between a serving network node of the radio communication system and the electronic communication device; and

calculating a real time of block error rate determination of first attempt for transmissions of the automatic repeat request approach at a data decoder of the electronic communication device,

wherein the information about outer loop link adaptation adjustment comprises the calculated real time based on the one or more elements and the step size used for the outer loop link adaptation based on acknowledgements and non-acknowledgements of an automatic repeat request approach.

16. :

The method of claim 11, wherein information about outer loop link adaptation adjustment is determined from a look-up table comprising one or more of;

targeted block error rate;

information about communication scenario or condition;

step size used for the outer loop link adaptation based on acknowledgements and non-acknowledgements of an automatic repeat request approach;

adjusted time limit of time of block error rate of first attempt for transmissions of the automatic repeat request approach;

propagation channel;

channel correlation; and

information related to an estimated maximum Doppler shift of signals on a physical channel between a serving network node of the radio communication system and the electronic communication device.

17. :

The method of claim 1, comprising receiving a request from a network node of the radio communication system, wherein the determining of a link adaptation status and the transmitting of information related to the determined link adaptation status to one or more network nodes of the radio communication system are performed upon the request.

18. :

The method of claim 1, wherein the electronic device only transmits the information related to the determined link adaptation status if there is a change in the determined link adaptation status.

19. :

The method of claim 17, wherein the transmitting is performed in a higher layer signalling, wherein higher layer is above physical link layer.

20. :

A method of a network node of a radio communication system, wherein the radio communication system has capability of performing link adaptation by adapting one or more parameters of communication in view of a quality of a radio link between the network node of the radio communication system and an electronic communication device arranged to operate in the radio communication system, the method comprising;

receiving, from the electronic communication device, a link adaptation status for the electronic communication device; and

adapting link adaptation operations based on the received link adaptation status.

21. :

The method of claim 20, wherein the adapting of the link adaptation operations includes selecting modulation and coding scheme.

22. :

The method of claim 20, wherein the adapting of the link adaptation operations includes adjusting an outer loop link adaptation from decoding performance such that expected channel quality is corrected with a back-off value towards a predefined block error rate target.

23. :

The method of claim 20, wherein the adapting of the link adaptation operations includes adapting resource allocation for communication resources allocated to a link with the electronic communication device.

24. :

The method of claim 20, wherein the adapting of the link adaptation operations includes adapting scheduling for the communication with the electronic communication device.

25. :

The method of claim 24, wherein the adapting of scheduling comprises adapting package size for communication of a link with the electronic communication device.

26. :

The method of claim 20, comprising transmitting information to another network node of the radio communication system about the received link adaptation status.

27. :

The method of claim 20, comprising transmitting a request to the electronic communication device to determine the link adaptation status.

28. :

The method of claim 20, comprising;

determining whether it is allowed for the electronic communication device to perform link adaptation; and

transmitting signalling to the electronic communication device, wherein the signalling comprises an indication whether link adaptation is allowed for the electronic communication device.

29. :

A non-transitory computer readable storage medium comprising instructions which, when executed on a processor of an electronic communication apparatus arranged to operate in a radio communication system, cause the electronic communication apparatus to perform a method, wherein the radio communication system has capability of performing link adaptation by adapting one or more parameters of communication in view of a quality of a radio link between a network node of the radio communication system and the electronic communication apparatus, the method comprising;

determining a link adaptation status for the electronic communication apparatus and; and

transmitting information related to the determined link adaptation status to one or more network nodes of the radio communication system.

30. :

A non-transitory computer readable storage medium comprising instructions which, when executed on a processor of a network node of a radio communication system, causes the network node to perform a method, wherein the radio communication system has capability of performing link adaptation by adapting one or more parameters of communication in view of a quality of a radio link between the network node of the radio communication system and an electronic communication device arranged to operate in the radio communication system, the method comprising;

receiving, from the electronic communication device, a link adaptation status for the electronic communication device; and

adapting link adaptation operations based on the received link adaptation status.

31. :

An electronic communication device arranged to operate in a radio communication system, wherein the radio communication system has capability of performing link adaptation by adapting one or more parameters of communication in view of a quality of a radio link between a network node of the radio communication system and the electronic communication device, wherein the electronic communication device is arranged to perform a method comprising;

determining a link adaptation status for the electronic communication apparatus and; and

transmitting information related to the determined link adaptation status to one or more network nodes of the radio communication system.

32. :

A network node of a radio communication system, wherein the radio communication system has capability of performing link adaptation by adapting one or more parameters of communication in view of a quality of a radio link between the network node of the radio communication system and an electronic communication device arranged to operate in the radio communication system, wherein the network node is arranged to perform a comprising;

receiving, from the electronic communication device, a link adaptation status for the electronic communication device; and

adapting link adaptation operations based on the received link adaptation status.