Method of evaluating the quality of a radio link in a mobile radiocommunication system

• US 20020042254A1
• Filed: 08/02/2001
• Published: 04/11/2002
• Est. Priority Date: 08/11/2000
• Status: Active Grant

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel SA (Nokia Corporation)
• Inventors: Agin, Pascal
• Granted Patent: US 7,099,637 B2
• Time in Patent Office: Days
• US Class Current: 455/135
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/20 using signal quality detector

Abstract

A method of evaluating the quality of a radio link in a mobile radiocommunication system from the net bit rate transmitted on the link.

Claims

1. A method of evaluating the quality of a radio link in a mobile radiocommunication system from the net bit rate transmitted on said link.

2. The method claimed in claim 1 wherein data transmitted on said link is obtained by coding blocks of information bits and said net bit rate is obtained by calculation using the equation:

3. The method claimed in claim 1 wherein quality is evaluated on the basis of the relative net bit rate, which is defined as the ratio between said net bit rate and the gross bit rate.

4. The method claimed in claim 3 wherein said ratio between said net bit rate and said gross bit rate is obtained by calculation using the equation:

5. The method claimed in claim 3 wherein the number of bits of the blocks transmitted is a function of the modulation scheme used and said gross bit rate is determined for a given modulation scheme corresponding to a reference modulation regardless of the modulation scheme used.

6. The method claimed in claim 5 wherein said ratio between said net bit rate and said gross bit rate is obtained by calculation using the equation:

7. The method claimed in claim 5 wherein said reference modulation is a modulation of lower spectral efficiency.

8. The method claimed in claim 3 wherein the blocks transmitted, or radio blocks, can include one or more blocks, or data blocks, depending on the modulation scheme used, and the ratio between said net bit rate and said gross bit rate is obtained by calculation using the equation:

9. The method claimed in claim 3 wherein said blocks transmitted, or radio blocks, can include one or more blocks, or data blocks, depending on the modulation scheme used, and the ratio between said net bit rate and said gross bit rate is obtained by calculation using the equation:

10. The method claimed in claim 3 wherein the blocks transmitted, or radio blocks, can include one or more blocks, or data blocks, depending on the modulation scheme used, and the ratio between said net bit rate and said gross bit rate is obtained by calculation using the equation:

11. A mobile radiocommunication system for implementing the method claimed in claim 1 and adapted to evaluate the quality of a radio link from the net bit rate transmitted on said link.

12. The system claimed in claim 11 wherein said link is an uplink.

13. The system claimed in claim 11 wherein said link is a downlink.

14. A mobile radiocommunication network entity for implementing the method claimed in claim 1 and adapted to evaluate the quality of a radio link from the net bit rate transmitted on said link.

15. The entity claimed in claim 14 wherein said link is an uplink.

16. The entity claimed in claim 14 wherein said link is a downlink.

17. A mobile station for implementing the method claimed in claim 1 and adapted to evaluate the quality of a radio link from the net bit rate transmitted on said link.

18. The mobile station claimed in claim 17 wherein said link is a downlink.

19. The mobile station claimed in claim 17 wherein said link is an uplink.