HENB Blind Detection for Hierarchy Configuration

• US 20120224533A1
• Filed: 10/30/2009
• Published: 09/06/2012
• Est. Priority Date: 10/30/2009
• Status: Abandoned Application

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Lin, Jie Zhen, He, Jing, Yao, Chun Hai, Wu, Chunli, Skov, Peter, Zhao, Dong
• Application Number:
  US13/504,616
• Publication Number:
  US 20120224533A1
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 56/002 Mutual synchronization
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

It is provided an apparatus, comprising including deciding means configured to decide whether or not a predefined condition is met; receiving means configured to receive a first signal at predefined places; inhibiting means configured to inhibit sending a second signal at the predefined places, if the deciding means decides that the predefined condition is met; monitoring means configured to monitor, if the deciding means decides that the predefined condition is met, for at least two of the predefined places whether or not a first signal is received at the predefined places; defining means configured to define a first mute place based on the monitoring result of the monitoring means and a predefined rule, wherein the first mute place is one of the predefined places at which a first signal is received; wherein the inhibiting means is configured to inhibit sending the second signal at the first mute place.

Claims

1. Apparatus, comprising

deciding means configured to decide whether or not a predefined condition is met;

receiving means configured to receive a first signal at predefined places;

inhibiting means configured to inhibit sending a second signal at a plurality of the predefined places, if the deciding means decides that the predefined condition is met ;

monitoring means configured to monitor, if the deciding means decides that the predefined condition is met, for at least two of the predefined places whether or not a first signal is received at the predefined places;

defining means configured to define a first mute place based on the monitoring result of the monitoring means and a predefined rule, wherein the first mute place is one of the predefined places at which, according to the monitoring means, a first signal is received;

wherein the inhibiting means is configured to inhibit sending the second signal at the first mute place.

2. The apparatus according to claim 1, further comprising controlling means configured to control a timing based on the first signal comprising a first synchronization signal.

3. The apparatus according to claim 2, wherein the second signal comprises a second synchronization signal corresponding to the first synchronization signal.

4. The apparatus according to claim 1, wherein the defining means is further configured to define a second mute place depending on the first mute place and the predefined rule, wherein the second mute place is one of the predefined places different from the first mute place, and the inhibiting means is further configured to inhibit sending the second signal at the second mute place.

5. The apparatus according to claim 1, further comprising

power detecting means configured to detect a received power of the first signal, and wherein

the defining means is further configured to define the first mute place based on the received power.

6. The apparatus according to claim 1, further comprising

interference detecting means configured to detect an interference level of the first signal, and wherein

the deciding means is configured to decide that the predefined condition is met, if the interference level is larger than a predefined threshold.

7. The apparatus according to claim 1, wherein the predefined condition comprises at least one of a booting of the apparatus, a receipt of a predefined command by the apparatus, a deterioration of the first signal at the first mute place more than a predefined level, and lapse of a predefined time after the condition has been met before.

8. The apparatus according to claim 1, further comprising

sending means configured to send the second signal at a sending place out of the predefined places, wherein the sending place depends on the first mute place and is different from the first mute place.

9. The apparatus according to claim 1, wherein according to the predefined rule a first hierarchical level corresponding to the place of the received first signal is determined, a second hierarchical level is defined as the next level below the first hierarchical level and associated to the apparatus, and the first mute place is determined from the second hierarchical level.

10. The apparatus according to claim 9, wherein the hierarchical level corresponds to a stratum of synchronization.

11. The apparatus according to claim 1, wherein the predefined places comprise predefined times.

12. Base station means comprising an apparatus according to claim 1.

13. A method, comprising

deciding whether or not a predefined condition is met;

receiving a first signal at at least one of predefined places;

inhibiting sending a second signal at a plurality of the predefined places if the predefined condition is met;

monitoring, if the predefined condition is met, for at least two of the predefined places whether or not the first signal is received at the predefined place;

defining a first mute place based on the monitoring result and a predefined rule, wherein the first mute place is one of the predefined places at which a first signal is received; and

inhibiting sending the second signal at the first mute place.

14. The method according to claim 13, further comprising controlling a timing based on the first signal comprising a first synchronization signal.

15. The method according to claim 14, wherein the second signal comprises a second synchronization signal corresponding to the first synchronization signal.

16. The method according to claim 13, further comprising

defining a second mute place depending on the first mute place and the predefined rule, wherein the second mute place is one of the predefined places different from the first mute place, and

inhibiting sending the second signal at the second mute place.

17. The method according to claim 13, further comprising

detecting a received power of the first signal, and

defining the first mute place based on the received power.

18. The method according to claim 13, further comprising

detecting an interference level of the first signal, and

deciding that the predefined condition is met, if the interference level is larger than a predefined threshold.

19. The method according to claim 13, wherein the predefined condition comprises at least one of a booting of the apparatus, a receipt of a predefined command by the apparatus, a deterioration of the first signal at the first mute place more than a predefined level, and lapse of a predefined time after the condition has been met before.

20. The method according to claim 13, further comprising

sending the second signal at a sending place out of the predefined places, wherein the sending place depends on the first mute place and is different from the first mute place.

21. The method according to claim 13, wherein according to the predefined rule a first hierarchical level corresponding to the place of the received first signal is determined, a second hierarchical level is defined as the next level below the first hierarchical level and associated to the apparatus, and the first mute place is determined from the second hierarchical level.

22. The method according to claim 21, wherein hierarchical level corresponds to a stratum synchronization.

23. The method according to claim 13, wherein the predefined places comprise predefined times.

24. Computer program product embodied on a computer-readable medium, comprising program instructions which perform, when run on a computer, the execution of which result in operations of the method according to claim 13.

25-26. -26. (canceled)