Radio-Transmission System and Corresponding Method of Operation

• US 20090180392A1
• Filed: 04/10/2007
• Published: 07/16/2009
• Est. Priority Date: 05/10/2006
• Status: Abandoned Application

• Current Assignee: Rohde & Schwarz GmbH & Company KG
• Original Assignee: Rohde & Schwarz GmbH & Company KG
• Inventors: Greiner, Guenter, Bott, Rainer
• Application Number:
  US12/299,722
• Publication Number:
  US 20090180392A1
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/122 by diverting traffic away from congested entities
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A radio transmission system has an ad-hoc network, which can be used to transmit data packets with a prescribed waveform, for each node a rating device, which rates the quality of the transmission of the data packets via the ad-hoc network, and an orientation channel. The orientation channel is used to transmit the data packets when the rating device has rated the quality of the transmission of the data packets via the ad-hoc network as unsatisfactory.

Claims

1. Radio-transmission system comprising

an ad-hoc network with several nodes, across which data packets are transmitted with a predetermined waveform,

an evaluation device for every node, which evaluates the quality of the transmission of the data packets via the ad-hoc network, and

an orientation channel, across which the data packets are transmitted, if the evaluation device has evaluated the quality of transmission of the data packets via the ad-hoc network as unsatisfactory,

wherein

every node of the radio-transmission system provides a switching device, which also switches the reception in a cyclical manner between a frequency of the ad-hoc network and the frequency of the orientation channel, if the evaluation device has evaluated the transmission via the ad-hoc network as qualitatively satisfactory.

2. Radio-transmission system according to claim 1,

wherein

the orientation channel has a relatively-lower transmission frequency, in comparison with the ad-hoc network.

3. Radio-transmission system according to claim 1,

wherein

the orientation channel provides a relatively more robust modulation type, in comparison with the ad-hoc network.

4. Radio-transmission system according to

claim 1, wherein

the orientation channel provides a relatively lower-value coding by in comparison with the ad-hoc network.

5. Radio-transmission system according to

claim 1, wherein

the orientation channel provides at least one of an improved error protection and a better coding in comparison with the ad-hoc network.

6. Radio-transmission system according to

claim 1, wherein

the orientation channel provides a relatively higher transmission power in comparison with the ad-hoc network.

7. Radio-transmission system according to

claim 1, wherein

the evaluation device evaluates a channel of the ad-hoc network which is not occupied with radio traffic, by determining at least one of the magnitude and the type of interference signals on the channel.

8. Radio-transmission system according to

claim 1, wherein

the evaluation device evaluates a channel of the ad-hoc network which is occupied with radio traffic, by analyzing the message signals of the data packets transmitted on the channel.

9. Radio-transmission system according to claim 8,

wherein

the evaluation device implements an analysis of at least one of a constellation diagram, a signal-noise ratio, fading parameters, and a bit-error rate.

10. Radio-transmission system according to

claim 1, comprising

a network radio device for at least one of transmission on the orientation channel and reception of the orientation channel.

11. Radio-transmission system according to

claim 1, wherein

every node of the radio-transmission system provides a separate transmitter-receiver for the reception of the orientation channel.

12. Radio-transmission system according to

claim 1, wherein

every node of the radio-transmission system provides a hardware module or software module for the reception of the orientation channel, which is integrated in a network radio device associated with the respective node.

24. Radio-transmission system according to claim 2, wherein the orientation channel has a transmission frequency within the HF range (10 MHz to 30 MHz).

25. Radio-transmission system according to claim 2, wherein the orientation channel has a transmission frequency within the VHF range (30 MHz to 88 MHz).

26. Radio-transmission system according to claim 3, wherein the modulation type provided by the orientation channel is a relatively lower-value PSK (Phase Shift Keying) or FSK (Frequency Shift Keying) modulation type.

13. Method for operating a radio-transmission system comprising an ad-hoc network, across which data packets are transmitted with a predetermined waveform, and

said system comprising an orientation channel, said method comprising:

constantly evaluating the quality of the transmission of the data packets via the ad-hoc network, and transmitting the data packets via the orientation channel, if the quality of the transmission of the data packets via the ad-hoc network is evaluated as unsatisfactory,

and

in every node of the radio-transmission system, also switching the reception in a cyclical manner between a frequency of the ad-hoc network and a frequency of the orientation channel, if the evaluation device has evaluated the transmission via the ad-hoc network as qualitatively satisfactory.

14. Method according to claim 13,

comprising operating

the orientation channel with a relatively-lower transmission frequency in comparison with the ad-hoc network.

15. Method according to claim 13,

comprising operating

the orientation channel with a relatively lower-value modulation type in comparison with the ad-hoc network.

16. Method according to

claim 13, comprising operating

the orientation channel with an improved error protection in comparison with the ad-hoc network.

17. Method according to

claim 13, comprising operating

the orientation channel with a relatively slower data rate in comparison with the ad-hoc network.

18. Method according to

claim 13, comprising operating

the orientation channel with a relatively higher transmission power by comparison with the ad-hoc network.

19. Method according to

claim 13, comprising constantly evaluting

a channel of the ad-hoc network which is not occupied with radio traffic, by determining at least one of the magnitude and type of interference signals on the channel.

20. Method according to

claim 13, comprising evaluating

a channel of the ad-hoc network which is occupied with radio traffic, by analyzing the message signals of the data packets transmitted on the channel.

21. Method according to claim 20,

comprising analyzing at least one of a constellation diagram, a signal-noise, fading parameters, and a bit-error rate.

22. Method according to

claim 13, comprising using

the orientation channel for requesting the identity of a network node and for requesting its position.

23. Method according to claim 22,

comprising implementing

said request either singly, with initiation by the user, or in a cyclical manner, controlled by the node.

27. Method according to claim 14, comprising operating the orientation channel with a transmission frequency within the HF range (10 MHz to 30 MHz).

28. Method according to claim 14, comprising operating the orientation channel within the VHF range (30 MHz to 88 MHz).

29. Method according to claim 15, comprising operating the orientation channel with a PSK (Phase Shift Keying) or FSK (Frequency Shift Keying) modulation type.