Wireless system and method for evaluating quality of service

• US 6,445,916 B1
• Filed: 01/07/1999
• Issued: 09/03/2002
• Est. Priority Date: 01/07/1999
• Status: Expired due to Term

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Rahman, Mohamed Anisur
• Primary Examiner(s): Hunter, Daniel
• Assistant Examiner(s): Tran, Pablo N
• Application Number:
  US09/226,612
• Time in Patent Office: 1,335 Days
• Field of Search: 455/450, 455/423, 455/424, 455/425, 455/512, 455/513, 455/422, 455/8, 455/9, 455/509, 455/453, 455/522, 455/553, 370/489, 370/329, 370/338, 370/348, 709/224, 709/285, 709/226, 709/238, 325/220, 379/100.04, 379/114, 379/100.01, 379/115, 379/111
• US Class Current: 455/423
• CPC Class Codes: H04M 15/00 Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
• CPC Class Codes: H04M 15/70 Administration or customization aspects; Counter-checking correct charges
• CPC Class Codes: H04M 15/73 Validating charges
• CPC Class Codes: H04M 15/8016 based on quality of service [QoS]
• CPC Class Codes: H04M 2215/2026 Wireless network, e.g. GSM, PCS, TACS
• CPC Class Codes: H04M 2215/32 Involving wireless systems
• CPC Class Codes: H04M 2215/70 Administration aspects, modify settings or limits or counter-check correct charges
• CPC Class Codes: H04M 2215/7072 Validate charges
• CPC Class Codes: H04M 2215/7414 QoS
• CPC Class Codes: H04W 4/24 Accounting or billing

Abstract

A method for evaluating quality of service for billing purposes in a wireless communications system includes establishing a target quality of service level for a subscriber station; expending resources of the wireless communications system at a resource level to maintain the established target quality of service level; measuring the actual quality service level over the measuring interval to characterize the actual quality of service with respect to the target quality of service level as a compliant interval or a non-compliant interval temporally coextensive with the measuring interval.

Claims

1. A method for evaluating quality of service for billing purposes in a wireless communications system, the method comprising the steps of:

establishing a target quality of service level of communications of a corresponding subscriber station on the wireless communications system;

expending resources of the wireless communications system at a resource level to attempt to maintain the established target quality of service level for the corresponding subscriber station;

measuring the actual quality service level provided over the measuring interval; and

characterizing the measured actual quality of service with respect to the target quality of service level as a compliant interval or a non-compliant interval temporally coextensive with the measuring interval.

2. The method according to claim 1 further comprising the step of:

measuring the resource level of the resources expended over the measuring interval.

3. The method according to claim 2 further comprising the step of:

verifying the accuracy of the measured actual quality of service by comparing the measured actual quality of service to the measured resource level for the measuring interval.

4. The method according to claim 2 further comprising the step of:

recording a subscriber identifier for the subscriber, the measured resource level, the measuring interval, the target quality of service, and actual quality of service corresponding to the subscriber.

5. The method according to claim 2 further comprising the step of:

recording a subscriber identifier for the subscriber, the measured resource level, the measuring interval, the target quality of service, and data indicative of compliance or noncompliance of the actual quality of service from the characterizing step.

6. The method according to claim 1 wherein the establishing step further comprises:

establishing a worst case signal-to-interference ratio for the subscriber as the target quality of service level, the worst case signal-to-interference ratio selected from the downlink signal-to-interference ratio and the uplink signal-to-interference ratio.

7. The method according to claim 1 wherein the establishing step further comprises:

establishing a minimum bit-error-rate for the subscriber as the target quality of service level.

8. The method according to claim 1 wherein the establishing step further comprises:

establishing a minimum bit-error-rate and a minimum frame error rate for the subscriber as the target quality of service level for the subscriber communicating over a voice channel.

9. The method according to claim 1 wherein the establishing step further comprises:

establishing a maximum packet size and a maximum packet scheduling delay corresponding to the maximum packet size as the target quality of service level for the subscriber communicating over a data channel.

10. The method according to claim 1 wherein the establishing step further comprises:

establishing a minimum bit-error-rate, a minimum packet size, and a maximum packet scheduling delay corresponding to the minimum packet size as the target quality of service level for the subscriber communicating over a data channel.

11. The method according to claim 2 wherein the expending step comprises:

controlling a transmission power of a downlink signal to the subscriber station, an uplink signal to the subscriber station, or both to maintain the established quality of service.

12. The method according to claim 11 wherein the measuring of the resource level step comprises:

counting a frequency of transmission power changes required to maintain the target quality of service level as an indicator of the resource level of the resources expended.

13. The method according to claim 11 wherein the measuring of the resource level step comprises:

measuring an amplitude differential of the transmission power changes for each of the transmission power changes if the amplitude is not a fixed interval.

14. The method according to claim 11 wherein measuring the resource level step comprises:

calculating a total power consumption during each measuring interval as a indicator of resource level of resources expended.

15. The method according to claim 2 further comprising the step of:

generating a billing record for the subscriber over a billing period based upon a total of measured resource levels over measured intervals, a sum of the measured intervals approximately or exactly equaling the billing period.

16. The method according to claim 15 further comprising the step of:

establishing a billing record indicating measured intervals wherein the actual quality of service does generally not meet or exceed the target quality of service.

40. The method according to claim 2 wherein the expending step comprises:

controlling at least one of a radio frequency power output and a receiver amplifier gain of the base station servicing said subscriber station.

17. A wireless communication system comprising:

a user interface for establishing a target quality of service level of communications of a subscriber station on the wireless communications system;

a resource measurer for measuring the resource level of the resources expended over a measuring interval to maintain the established target quality service level;

a performance measurer for measuring the actual quality service level over the measuring interval to characterize the actual quality of service with respect to the target quality of service level as a compliant interval or a non-compliant interval temporally coextensive with the measuring interval.

18. The communications system according to claim 17 further comprising:

a data processing assembly for recording a subscriber identifier for the subscriber, the measured resource level, the measuring interval, the target quality of service, and actual quality of service corresponding to the subscriber.

19. The communications system according to claim 17 further comprising:

a data processing assembly for recording a subscriber identifier for the subscriber, the measured resource level, the measuring interval, the target quality of service, and data indicative of compliance or noncompliance of the actual quality of service.

20. The communications system according to claim 17 wherein the resource measurer comprises a radio frequency signal strength meter.

21. The communications system according to claim 17 wherein the resource measurer comprises a spectrum analyzer.

22. The communications system according to claim 17 wherein the resource measurer comprises a counter receiving power level control data from a base station subsystem and counting a frequency of power level changes.

23. The communications system according to claim 17 wherein the resource measurer comprises a radio frequency power meter coupled to an integrator for summing the total power consumption of the downlink transmission to the subscriber, the uplink transmission from the subscriber, or both during the measuring interval.

24. The communications system according to claim 17 wherein the performance measurer comprises a tester selected from the group consisting of a bit-error rate tester and a frame-error rate tester.

25. The communications system according to claim 17 wherein the performance measurer comprises a first timer for measuring a packet interval and a second timer for measuring a packet scheduling delay between adjacent packet intervals for the subscriber.

26. The communications system according to claim 17 further comprising a resource allocator for expending resources of the communication system at a resource level associated with maintaining the established target quality of service level for the corresponding subscriber station.

27. The communications system according to claim 26 wherein the resource allocator controls at least one of the radio frequency power output and the receiver amplifier gain of the base station servicing said subscriber station.

36. The communications system according to claim 26 wherein the resource allocator controls a transmission power of a downlink signal to the subscriber station, an uplink signal to the subscriber station, or both to maintain the established target quality of service.

28. A wireless communications system comprising:

subscriber stations adapted to communicate with a base station, each subscriber station including a downlink performance measurer for measuring a signal quality parameter of a downlink signal path;

a base station including an uplink performance measurer for measuring a signal quality parameter of an uplink signal path between the base station and an active one of the subscriber stations;

a base station controller including a quality sample organizer receiving measured quality samples of the signal quality parameters from the downlink performance measurer and the uplink performance measurer;

a user interface for defining a hierarchy of standard levels of quality of service, wherein each standard level corresponds to a range of quality of service; and

a data processing assembly for recording quality of service information derived from the quality sample organizer and for determining compliance with the standard levels of quality of service, the data processing assembly coupled to the user interface.

29. The communications system according to claim 28 wherein the downlink performance measurer comprises a bit-error rate tester coupled to a demodulator output of one of the subscribers stations, the uplink performance measurer comprising a bit-error rate tester coupled to a demodulator output of the base station.

30. The communications system according to claim 28 wherein the downlink performance measurer comprises a bit-error rate tester, a first timer for measuring a duration of a packet interval, and a second timer for measuring a packet scheduling delay between adjacent packet intervals, such that the downlink performance measurer is capable of measuring packet data transmission performance over the wireless communications system.

31. The communications system according to claim 28 wherein the uplink performance measurer comprises a bit-error rate tester, a first timer for measuring a packet interval, and a second timer for measuring a packet scheduling delay between adjacent intervals, such that the uplink performance measurer is capable of measuring packet data transmission performance over the wireless communications system.

32. The communications system according to claim 28 wherein the uplink performance measurer and the downlink performance measurer measure the same signal quality parameter over a common measuring interval.

33. The communications system according to claim 28 wherein the quality of service information includes a subscriber identifier corresponding to a subscriber, the measuring interval, and the target quality of service corresponding to the subscriber.

34. The communications system according to claim 28 wherein the data processing assembly produces a quality of service record from the quality of service information, and further comprising a billing unit for billing subscribers based on the quality of service record available from the data processing assembly.

35. The communications system according to claim 28 wherein the data processing assembly is integrated into a home location register.

37. The communications system according to claim 28 wherein said base station controller further includes a resource allocator for expending resources of the communication system at a resource level associated with maintaining the established target quality of service level for the corresponding subscriber station.

38. The communications system according to claim 37 wherein the resource allocator controls at least one of a radio frequency power output and a receiver amplifier gain of the base station servicing said subscriber station.

39. The communications system according to claim 37 wherein the resource allocator controls a transmission power of a downlink signal to the subscriber station, an uplink signal to the subscriber station, or both to maintain the established target quality of service.