Interference control method, network element, device, computer program product and computer program distribution medium

• US 20060252436A1
• Filed: 06/16/2005
• Published: 11/09/2006
• Est. Priority Date: 05/06/2005
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Tirkkonen, Olav, Kokkonen, Mikko
• Application Number:
  US11/153,399
• Publication Number:
  US 20060252436A1
• Time in Patent Office: Days
• US Class Current: 455/501
• CPC Class Codes: H04B 7/12 Frequency diversity
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

The invention is related to a computer program product encoding a computer program of instructions for executing a computer process for interference control, the process comprising: setting a first power constraint for multi-antenna transmissions; setting a second power constraint for single-stream transmissions, wherein the first power constraint and the second power constraint control the use of predetermined resources in a way that the resources are reserved for the single-stream transmissions or the resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, the power level of the multi-antenna transmissions being lower than the power level of the single-antenna transmissions.

Claims

1. An interference control method in a communication system, the method comprising:

setting a first power constraint for multi-antenna transmissions; and

setting a second power constraint for single-stream transmissions,

wherein the first power constraint and the second power constraint control the use of predetermined resources in a way that at least a part of the resources are reserved for the single-stream transmissions or at least a part of the resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, a power level for the multi-antenna transmissions being set lower than a power level for the single-antenna transmissions by means of the first power constraint and the second power constraint.

2. The method of claim 1, wherein the predetermined resource is spectrum and frequencies of the spectrum are used to provide frequency diversity.

3. The method of claim 1, wherein orthogonal frequency division multiplexing modulation is used in a way that a subset of sub-carriers is reserved for single-stream transmissions, or single-stream transmissions on a set of sub-carriers are allowed to be transmitted with a higher power than multi-antenna transmissions.

4. The method of claim 1, further comprising allocating resources less affected by interference caused by multi-antenna transmissions to selected users.

5. The method of claim 1, further comprising realizing an interference control by using static allocation, wherein the resource selection for multi-stream transmissions is made while the communication system is set up.

6. The method of claim 1, further comprising realizing an interference control for both uplink and downlink transmissions.

7. An interference control method in a communication system, the method comprising:

setting different power constraints for single-stream transmissions having at least one different character,

wherein the power constraints control the use of predetermined resources by allocating the resources for the single-stream transmissions in a way that interference circumstances in adjacent cells are improved.

8. The method of claim 7, wherein a different power constraint is set for space-time coded single-stream transmissions than other kind of single-stream transmissions.

9. An interference control method in a communication system, the method comprising:

determining at least one character on the basis of which transmission groups are formed; and

setting group-specific power constraints for the transmission groups,

wherein the group-specific power constraints control the use of predetermined resources by allocating the resources for the transmission groups in a way that interference circumstances in adjacent cells are improved.

10. A network element, comprising:

means for controlling interference by using a predetermined first power constraint for multi-antenna transmissions and a predetermined second power constraint for single-stream transmissions, a control being carried out in a way that predetermined resources are reserved for the single-stream transmissions or predetermined resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, a power level for the multi-antenna transmissions being set lower than a power level for the single-antenna transmissions by means of the power constraints.

11. The network element of claim 10, wherein the predetermined resource is spectrum and frequencies of the spectrum are used to provide frequency diversity.

12. The network element of claim 10, further comprising means for using orthogonal frequency division multiplexing in a way that a subset of sub-carriers is reserved for single-stream transmissions, or single-stream transmissions on a set of sub-carriers are allowed to be transmitted with a higher power than multi-antenna transmissions.

13. The network element of claim 10, further comprising means for allocating resources less affected by interference caused by multi-antenna transmissions to selected users.

14. The network element of claim 10, further comprising means for realizing an interference control by using static allocation, wherein the resource selection for multi-stream transmissions is made while the communication system is set up.

15. The network element of claim 10, further comprising means for realizing an interference control for both uplink and downlink transmissions.

16. A network element, comprising:

means for controlling interference by using predetermined characterizing power constraints for single-stream transmissions and by carrying out resource allocation in a way that interference circumstances in adjacent cells are improved.

17. A network element, comprising:

means for controlling interference by using predetermined transmission group-specific power constraints in allocation of predetermined resources for transmission groups.

18. A device, comprising:

means for controlling interference by using a predetermined first power constraint for multi-antenna transmissions and a predetermined second power constraint for single-stream transmissions, a control being carried out in a way that predetermined resources are reserved for the single-stream transmissions or predetermined resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, a power level for the multi-antenna transmissions being lower than a power level for the single-antenna transmissions.

19. A device, comprising:

means for controlling interference by using predetermined characterizing power constraints for single-stream transmissions and by carrying out resource allocation in a way that interference circumstances in adjacent cells are improved.

20. A device, comprising:

means for controlling interference by using predetermined transmission group-specific power constraints in allocation of predetermined resources for transmission groups.

21. A computer program product embodied within a computer readable medium, the computer program product encoding a computer program of instructions for executing a computer process for interference control, the process comprising:

setting a first power constraint for multi-antenna transmissions; and

setting a second power constraint for single-stream transmissions,

wherein the first power constraint and the second power constraint control the use of predetermined resources in a way that at least a part of the resources are reserved for the single-stream transmissions or at least a part of the resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, a power level for the multi-antenna transmissions being set lower than a power level for the single-antenna transmissions by means of the power constraints.

22. A computer program distribution medium readable by a computer and encoding a computer program of instructions for executing a computer process for interference control, the process comprising:

setting a first power constraint for multi-antenna transmissions; and

setting a second power constraint for single-stream transmissions,

wherein the first power constraint and the second power constraint control the use of predetermined resources in a way that at least a part of the resources are reserved for the single-stream transmissions or at least a part of the resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, a power level for the multi-antenna transmissions being set lower than a power level for the single-antenna transmissions by means of the power constraints.

23. The computer program distribution medium of claim 22, the distribution medium including at least one of the following media:

a computer readable medium, a program storage medium, a record medium, a computer readable memory, a computer readable software distribution package, a computer readable signal, a computer readable telecommunications signal, and a computer readable compressed software package.

24. A network element, configured to:

control interference by using a predetermined first power constraint for multi-antenna transmissions and a predetermined second power constraint for single-stream transmissions, a control being carried out in a way that predetermined resources are reserved for the single-stream transmissions or predetermined resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, a power level for the multi-antenna transmissions being set lower than a power level for the single-antenna transmissions by means of the power constraints.

25. A network element, configured to:

control interference by using predetermined characterizing power constraints for single-stream transmissions and by carrying out resource allocation in a way that interference circumstances in adjacent cells are improved.

26. A network element, configured to:

control interference by using predetermined transmission group-specific power constraints in allocation of predetermined resources for transmission groups.

27. A device, configured to:

control interference by using a predetermined first power constraint for multi-antenna transmissions and a predetermined second power constraint for single-stream transmissions, the control being carried out in a way that predetermined resources are reserved for the single-stream transmissions or predetermined resources are allowed for the multi-antenna transmissions and for the single-stream transmissions, the power level for the multi-antenna transmissions being set lower than the power level for the single-antenna transmissions by means of the power constraints

28. A device, configured to:

control interference by using predetermined characterizing power constraints for single-stream transmissions and by carrying out resource allocation in a way that interference circumstances in adjacent cells are improved.

29. A device, configured to:

control interference by using predetermined transmission group-specific power constraints in allocation of predetermined resources for transmission groups.