Method for supervising base station radio channels

• US 5,737,359 A
• Filed: 05/10/1995
• Issued: 04/07/1998
• Est. Priority Date: 09/14/1993
• Status: Expired due to Term

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Telecommunications Oy (Nokia Corporation)
• Inventors: Koivu, Vesa
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Le, Amanda T.
• Application Number:
  US08/436,184
• Time in Patent Office: 1,063 Days
• Field of Search: 375/200, 375/202, 375/203, 375/260, 375/264, 375/286, 375/224, 375/227, 370/18, 370/19, 370/57, 370/84, 370/95.1, 370/69.1, 370/321, 370/333, 370/337, 370/347, 370/442, 455/63, 455/67.1, 455/67.3, 455/67.4, 455/226.1, 455/226.2, 455/226.3, 455/423-425, 379/59, 379/60
• US Class Current: 375/133
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

A method for supervising base station radio channels to detect channels with interference and/or poor quality, by measuring and analysing connections separately for each radio channel. For instance, radio channels with poor quality and/or interference in the frequency hopping sequence can be detected, eliminated from the frequency hopping sequence, and replaced by others, while the poor quality and/or interference remains a problem.

Claims

1. A method for supervising base station radio channels in a mobile communication system where the radio channels are divided into logical channels on a TDMA-principle, by measuring the quality of signals received on a plurality of said radio channels during a plurality of connections utilizing said radio channels, comprising the steps of:

separately measuring during said connections the received signal quality of the logical channels hopping from one radio channel to another for each of the radio channels used in a frequency hopping sequences, to obtain respective measured values of received signal quality;

storing separately the measured values of each radio channel used;

analyzing separately for each radio channel used by said connections the respective measured values of received signal quality for signals measured during a predetermined period of time; and

detecting that a radio channel has poor quality on the basis of said analyzing.

2. A method according to claim 1, in which:

the quality of the signals is measured for control or traffic channels by calculating the bit error rate separately for each used radio channel; and

said analyzing comprises calculating the average bit error rate of each radio channel used by each of said connections during said predetermined period of time.

3. A method according to claim 1, further including:

discarding a detected radio channel having poor quality and replacing the discarded radio channel in said frequency hopping sequences of control or traffic channels with another radio channel.

4. A method for supervising base station radio channels in a mobile communication system where the radio channels are divided into logical channels on a TDMA-principle, by measuring the quality of signals received on a plurality of said radio channels during a plurality of connections comprising the steps of:

separately measuring for a plurality of connections during said connections the received signal quality of control or traffic channels hopping from one radio channel to another for each of a plurality of radio channels used in frequency hopping sequences of said control or traffic channels, to obtain respective measured values of received signal quality;

storing separately for each of said control or traffic channels the measured values for each radio channel used by said control or traffic channels;

analyzing separately for each radio channel used the averages of the received signal quality; and

detecting that a radio channel has poor quality on the basis of said analyzing.

5. A method according to claim 4, further including:

discarding a detected radio channel having poor quality and replacing the discarded radio channel in said frequency hopping sequences of said control or traffic channels, with another radio channel.

6. A method for supervising base station radio channels in a mobile communication system where the radio channels are divided into logical channels on a TDMA-principle, by measuring the quality of signals received on a plurality of said radio channels during a plurality of connections utilizing said radio channels, comprising the steps of:

separately measuring during said connections the received signal quality of control or traffic channels hopping from one radio channel to another for each of the radio channels used in frequency hopping sequences, to obtain respective measured values of received signal quality;

storing separately the measured values for each radio channel used;

analyzing separately for each radio channel used by said connections the respective measured values of received signal quality for signals measured during a predetermined period of time;

detecting that a radio channel has poor quality on the basis of said analyzing; and

discarding a detected radio channel having poor quality and replacing the discarded radio channel in said frequency hopping sequences of said control or traffic channels, with another radio channel.