Methods for Signal Detection in a System with Sparse Synchronization Signal Rate

• US 20160380751A1
• Filed: 06/17/2015
• Published: 12/29/2016
• Est. Priority Date: 06/17/2015
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Ashraf, Shehzad Ali, Lindoff, Bengt
• Granted Patent: US 10,177,898 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 7/0016 correction of synchronization errors
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

The present disclosure relates to methods and devices for signal detection. More particularly the disclosure pertains to methods and arrangements for signal detection systems with sparse synchronization signal rate. According to some aspects, the disclosure relates to a method, performed in a radio network node, of detecting at least one signal transmitted from a wireless device, wherein the radio network node transmits a synchronization signal to the wireless device with a synchronization signal rate. The method comprises determining a period of time that has passed since the most recent transmission of the synchronization signal to the wireless device and configuring, in the radio network node, at least one radio setting related to detecting the at least one signal, based on the determined period of time. The method further comprises monitoring a radio spectrum for the at least one signal using the at least one radio setting.

Claims

1. A method, performed in a radio network node, of detecting at least one signal transmitted from a wireless device, wherein the radio network node transmits a synchronization signal to the wireless device with a synchronization signal rate, the method comprising:

determining a period of time that has passed since the most recent transmission of the synchronization signal to the wireless device;

configuring, in the radio network node, at least one radio setting related to detecting the at least one signal, based on the determined period of time; and

monitoring a radio spectrum for the at least one signal using the at least one radio setting.

2. The method of claim 1 comprising:

obtaining, a measure indicative of a time and/or a frequency drift of a carrier frequency in the wireless device.

3. The method of claim 2, wherein the obtaining comprises receiving the measure from the wireless device.

4. The method of claim 2, wherein the obtaining comprises reading a predefined value in the radio network node.

5. The method of claim 1, comprising:

reconfiguring transmission characteristics of the synchronization signal based on the obtained measure.

6. The method of claim 5, wherein the reconfiguring comprises changing the synchronization signal rate and/or a pattern of the synchronization signal.

7. The method of claim 5, wherein the reconfiguring is further based on a required quality of service.

8. The method of claim 1, comprising:

detecting (S6) the at least one signal.

9. The method of claim 1, wherein configuring the at least one radio setting comprises defining the radio resources in time and/or frequency that will be monitored.

10. The method claim 1, wherein configuring the at least one radio setting comprises modifying a detection threshold in the radio network node.

11. The method of claim 1, wherein the configuring comprises amending filter settings in the radio network node used for the detection.

12. The method of claim 1, wherein the at least one signal is an alert message or an alarm message, a random access message or a scheduling request.

13. A nontransitory computer-readable storage medium comprising computer program code which, when executed, causes a radio network node to execute a method of detecting at least one signal transmitted from a wireless device, wherein the radio network node transmits a synchronization signal to the wireless device with a synchronization signal rate, the method comprising:

determining a period of time that has passed since the most recent transmission of the synchronization signal to the wireless device;

configuring, in the radio network node, at least one radio setting related to detecting the at least one signal, based on the determined period of time; and

monitoring a radio spectrum for the at least one signal using the at least one radio setting.

14. A radio network node, in a communication system, the radio network node being configured for detecting at least one signal transmitted from a wireless device, wherein the radio network node is adapted to transmit a synchronization signal to the wireless device with a synchronization signal rate, the radio network node comprising:

a radio communication interface;

a network communication interface configured for communication with other radio network nodes, and

processing circuitry configured to cause the radio network node;

to determine a period of time that has passed since the most recent transmission of the synchronization signal to the wireless device;

to configure, in the radio network node, at least one radio setting related to detecting the at least one signal, based on the determined period of time; and

to monitor a radio spectrum for the at least one signal using the at least one radio setting.

15. The radio network node of claim 14, wherein the processing circuitry is configured to cause the radio network node:

to obtain, a measure indicative of a time and/or a frequency drift of a carrier frequency in the wireless device.

16. The radio network node of claim 15, wherein the obtaining comprises receiving the measure from the wireless device.

17. The radio network node of claim 15, wherein the obtaining comprises reading a predefined value in the radio network node.

18. The radio network node of claim 14, wherein the processing circuitry is configured to cause the radio network node:

to reconfigure transmission characteristics of the synchronization signal based on the obtained measure.

19. The radio network node of claim 14, wherein the processing circuitry is configured to cause the radio network node:

to detect the at least one signal.

20. A radio network node in a communication system, the radio network node being configured for detecting at least one signal transmitted from a wireless device, wherein the radio network node is adapted to transmit a synchronization signal to the wireless device with a synchronization signal rate, the radio network node comprising:

a determiner configured to determine a period of time that has passed since the most recent transmission of the synchronization signal to the wireless device;

a configurer adapted to configure, in the radio network node, at least one radio setting related to detecting the at least one signal, based on the determined period of time; and

a monitoring module configured to monitor a radio spectrum for the at least one signal using the at least one radio setting.

21. The radio network node of claim 20, wherein the radio network node comprises:

an obtainer configured to obtain, a measure indicative of a time and/or a frequency drift of a carrier frequency in the wireless device.

22. The radio network node of claim 20, wherein the radio network node comprises:

a reconfigurer configured to reconfigure transmission characteristics of the synchronization signal based on the obtained measure.

23. The radio network node of claim 20, wherein the radio network node comprises:

a detector module configured to detect the at least one signal.