Coverage of Private Base Station

• US 20100302959A1
• Filed: 06/23/2008
• Published: 12/02/2010
• Est. Priority Date: 06/26/2007
• Status: Active Grant

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Kottkamp, Meik, Gustrau, Joerg, Martos-Riano, Demian, Ulrich, Thomas, Breuer, Volker, Vesely, Alexander
• Granted Patent: US 8,929,283 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 52/265 taking into account the quality of service QoS
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A controller of a private base station receives data on a travel time depending on a propagation delay between a private base station and a user terminal. The controller outputs a control signal to a controllable amplifier for decreasing a transmission power of the private base station if the measured travel time is longer than a predetermined reference time or quality of service is lower than reference quality.

Claims

1. A method comprising:

measuring a travel time depending on a propagation delay between a private base station and a user terminal; and

decreasing transmission power of the private base station if the measured travel time is longer than a predetermined reference time.

2. The method of claim 1, further comprising decreasing the maximum transmission power of the private base station if the measured travel time is longer than the predetermined reference time.

3. The method of claim 1, further comprising measuring the travel time as a duration between a moment of transmission of a signal at the user terminal and a moment of reception of the signal at the user terminal, the signal traveling from the user terminal to the private base station and back from the private base station to the user terminal.

4. The method of claim 1, further comprising measuring the travel time as a duration between a moment of transmission of a signal at the private base station and a moment of reception of the signal at the private base station, the signal propagating from the private base station to the user terminal and back from the user terminal to the private base station.

5. The method of claim 1, further comprising measuring the travel time as a duration between a moment of transmission of a signal at the user terminal and a moment of reception of the signal at the private base station.

6. The method of claim 1, further comprising measuring the travel time as a duration between a moment of transmission of a signal at the private base station and a moment of reception of the signal at the user terminal.

7. The method of claim 1, further comprising measuring quality of service in a cell of a public base station where the private base station resides;

decreasing the transmission power of the private base station if the measured quality is lower than predetermined reference quality.

8. The method of claim 1, further comprising measuring the travel time by the user terminal;

signaling data on the travel time to the private base station; and

controlling the transmission power of the private base station on the basis of the data.

9. The method of claim 1, further comprising measuring the travel time by the user terminal;

signaling data on the travel time to a core network of a radio system; and

sending a control data to the private base station and controlling the transmission power of the private base station on the basis of the control data.

10. A method comprising:

measuring quality of service in a core network of a radio system; and

decreasing the transmission power of the private base station if the quality is lower than a predetermined level.

11. A private base station comprising:

a controllable amplifier and a controller;

the controllable amplifier is configured to adjust a transmission power of the private base station;

the controller is configured

to receive data on a travel time depending on a propagation delay between a private base station and a user terminal; and

to output a control signal to the controllable amplifier for decreasing the transmission power of the private base station if the measured travel time is longer than a predetermined reference time.

12. The private base station of claim 11, wherein the controller is configured to output the control signal to the controllable amplifier for decreasing a maximum transmission power of the private base station if the measured travel time is longer than the predetermined reference time.

13. The private base station of claim 11, wherein the private base station is configured to receive data on the travel time measured by the user terminal as a duration between a moment of transmission of a signal at the user terminal and a moment of reception of the signal at the user terminal, the signal traveling from the user terminal to the private base station and back from the private base station to the user terminal.

14. The private base station of claim 11, wherein the private base station is configured to measure the travel time as a duration between a moment of transmission of a signal at the private base station and a moment of reception of the signal at the private base station, the signal propagating from the private base station to the user terminal and back from the user terminal to the private base station.

15. The private base station of claim 11, wherein the private base station is configured to measure the travel time as a duration between a moment of transmission of a signal at the user terminal and a moment of reception of the signal at the private base station.

16. The private base station of claim 11, wherein the private base station is configured to receive data on the travel time measured by the user terminal as a duration between a moment of transmission of a signal at the private base station and a moment of reception of the signal at the user terminal.

17. The private base station of claim 11, wherein the private base station is further configured to receive data on quality of service in a cell of a public base station where the private base station resides measured by the core network;

the controller is configured to output the control signal for decreasing the transmission power of the private base station if the measured quality is lower than predetermined reference quality.

18. A private base station comprising:

the private base station receiving control data on quality of service measured in a core network of a radio system; and

the private base station being configured to decrease transmission power if the quality is lower than a predetermined level.

19. A radio system comprising:

a private base station and a user terminal;

the private base station comprising a controllable amplifier and a controller; and

the controllable amplifier being configured to adjust transmission power of the private base station;

the controller being configured to

receive data on a travel time depending on a propagation delay between a private base station and a user terminal; and

output a control signal to the controllable amplifier for decreasing the transmission power of the private base station if the measured travel time is longer than a predetermined reference time.

20. The radio system of claim 19, wherein the controller is configured to output the control signal to the controllable amplifier for decreasing the maximum transmission power of the private base station if the measured travel time is longer than the predetermined reference time.

21. The radio system of claim 19, wherein the user terminal is configured to measure the travel time as a duration between a moment of transmission of a signal at the user terminal and a moment of reception of the signal at the user terminal, the signal traveling from the user terminal to the private base station and back from the private base station to the user terminal.

22. The radio system of claim 19, wherein the private base station is configured to measure the travel time as a duration between a moment of transmission of a signal at the private base station and a moment of reception of the signal at the private base station, the signal propagating from the private base station to the user terminal and back from the user terminal to the private base station.

23. The radio system of claim 19, wherein the private base station is configured to measure the travel time as a duration between a moment of transmission of a signal at the user terminal and a moment of reception of the signal at the private base station.

24. The radio system of claim 19, wherein the user terminal is configured to measure the travel time as a duration between a moment of transmission of a signal at the private base station and a moment of reception of the signal at the user terminal.

25. The radio system of claim 19, wherein a core network comprises at least one public base station and a base station controller;

the core network is configured to measure quality of service in a cell of a public base station where the private base station resides;

the core network is configured to form a control signal on the basis of the quality of service and to send the control data to the private base station for decreasing the transmission power of the private base station if the measured quality is lower than predetermined reference quality.

26. The radio system of claim 19, wherein the user terminal is configured to measure the travel time and to signal data on the travel time to the private base station for controlling the transmission power of the private base station.

27. The radio system of claim 19, wherein the user terminal is configured to measure and to signal the travel time to a core network of a radio system;

and the core network is configured to send control data to the private base station for controlling the transmission power of the private base station.

28. A private base station comprising:

controllable amplifying means and controlling means;

the controllable amplifying means is configured to adjust a transmission power of the private base station;

the controlling means is configured

to receive data on a travel time depending on a propagation delay between a private base station and a user terminal; and

to output a control signal to the controllable amplifying means for decreasing the transmission power of the private base station if the measured travel time is longer than a predetermined reference time.

29. A radio system comprising:

a private base station and a user terminal;

the private base station comprising controllable amplifying means and controlling means; and

the controllable amplifying means being configured to adjust transmission power of the private base station;

the controlling means being configured to

receive data on a travel time depending on a propagation delay between a private base station and a user terminal; and

output a control signal to the controllable amplifying means for decreasing the transmission power of the private base station if the measured travel time is longer than a predetermined reference time.

30. A computer program product encoding a computer program of instructions for executing a computer process, the process comprising:

measuring a travel time depending on a propagation delay between a private base station and a user terminal; and

decreasing transmission power of the private base station if the measured travel time is longer than a predetermined reference time.

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

measuring a travel time depending on a propagation delay between a private base station and a user terminal; and

decreasing transmission power of the private base station if the measured travel time is longer than a predetermined reference time.

32. The computer program distribution medium of claim 31, 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.

33. A computer program product encoding a computer program of instructions for executing a computer process, the process comprising:

measuring quality of service in a core network of a radio system; and

decreasing transmission power of a private base station if the quality is lower than a predetermined level.

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

measuring quality of service in a core network of a radio system; and

decreasing transmission power of a private base station if the quality is lower than a predetermined level.

35. The computer program distribution medium of claim 34, 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.