Method for checking speech channel of base station and vocoder of control station in mobile communication system

• US 6,542,737 B1
• Filed: 08/29/2000
• Issued: 04/01/2003
• Est. Priority Date: 09/02/1999
• Status: Expired due to Fees

• Current Assignee: Utstarcom Korea Limited
• Original Assignee: SK Hynix Inc.
• Inventors: Kang, Dae Goo, Cho, Kye Chol, Kim, Young Bin
• Primary Examiner(s): NGUYEN, DUC M
• Application Number:
  US09/650,226
• Time in Patent Office: 945 Days
• Field of Search: 455/423, 455/424, 455/425, 455/67-- 6, 455/560, 455/561, 370/241, 370/241.1, 370/244, 370/249, 370/250, 370/251, 370/252, 370/329
• US Class Current: 455/423
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

There is provided a method for checking a speech channel of a base station and a vocoder of a control station in a mobile communication system, in which its operation station designates specific multiple vocoder of the control station and specific multiple speech channels of the base station to establish a call, to check if the vocoders and speech channels are poor, and when they are confirmed to be poor the operation station does not allow call services through the poor vocoder and speech channel, thereby continuously maintaining high quality call services.

Claims

1. A method for checking a speech channel of a base station and a vocoder of a control station in a mobile communication system, the method comprising the steps of:

selecting one of a plurality of test items to be checked, and transmitting the ID of a base station or control station for the selected test item and data corresponding to the selected test item to the base station and the control station;

the base station and the control station receiving and analyzing the data, and setting up a call to a mobile station through a speech channel of the base station and a vocoder of the control signal, the speech channel and vocoder being designated by an operation station, the call to be set up being determined according to the analyzed result;

after the call setup, gathering statistical data on the number of times of setting up a call through the vocoder and speech channel, causes of call cancellation and frame error rate by speech channels and vocoders, and transmitting the statistical data to the operation station; and

detecting a poor speech channel and a poor vocoder depending on the statistical data.

2. The method as claimed in claim 1, wherein the plurality of test items includes a test item 1 for checking only the speech channel of the base station, a test item 2 for checking only the vocoder of the control station, and test items 3 and 4 for simultaneously checking the vocoder of the control station and the speech channel of the base station.

3. The method as claimed in claim 2, wherein, when the test item 1 for checking only the speech channel of the base station is selected, the data transmitted to the base station and control station includes a specific service frequency or all service frequency provided by the base station, the ID of a specific speech channel or IDs of multiple speech channels provided by the base station, the kind of outgoing Markov call/incoming Markov call, an outgoing Markov call/incoming Markov call data transmission rate, a period of time for maintaining call setup and the number of times of attempting a call.

4. The method as claimed in claim 2, wherein, when the test item 2 for checking only the vocoder of the control station is selected, the data transmitted to the base station and control station includes a period of time for maintaining call setup, the number of times of attempting a call, the ID of a specific vocoder or IDs of multiple vocoders of a specific control station, and an incoming loop back call.

5. The method as claimed in claim 2, wherein, when the test items 3 and 4 for simultaneously checking the vocoder of the control station and the speech channel of the base station are selected, the data transmitted to the base station and control station includes a period of time for maintaining call setup, the number of times of attempting a call, the ID of a specific vocoder or IDs of multiple vocoders of a specific control station, the incoming/outgoing loop back call, the kind of an incoming/outgoing general call, and the phone number of a called part.

6. The method as claimed in claim 1, wherein, when a test item 1 for checking only the speech channel of the base station is selected, the data transmitted to the base station and control station includes a specific service frequency or all service frequency provided by the base station, the ID of a specific speech channel or IDs of multiple speech channels provided by the base station, the kind of outgoing Markov call/incoming Markov call, an outgoing Markov call/incoming Markov call data transmission rate, a period of time for maintaining call setup and the number of times of attempting a call.

7. The method as claimed in claim 1, wherein, when a test item 2 for checking only the vocoder of the control station is selected, the data transmitted to the base station and control station includes a period of time for maintaining call setup, the number of times of attempting a call, the ID of a specific vocoder or IDs of multiple vocoders of a specific control station, and an incoming loop back call.

8. The method as claimed in claim 1, wherein, when test items 3 and 4 for simultaneously checking the vocoder of the control station and the speech channel of the base station are selected, the data transmitted to the base station and control station includes a period of time for maintaining call setup, the number of times of attempting a call, the ID of a specific vocoder or IDs of multiple vocoders of a specific control station, the incoming/outgoing loop back call, the kind of an incoming/outgoing general call, and the phone number of a called part.

9. A method for checking a speech channel of a base station and a vocoder of a control station in a mobile communication system, the method comprising the steps of:

in the event of selection of a test item for checking only the speech channel of the base station from a plurality of test items, selecting a specific base station or multiple base stations according to the selected test item;

transmitting data on a period of time for maintaining call setup, the number of times of attempting a call, the frequency of the selected base station, the kind of a call and call setup, which correspond to the selected test item, to the base station;

receiving and analyzing the data transmitted to judge if a call can be established with a current service frequency of a mobile station;

when the call can be established with the current service frequency of the mobile station, transmitting a message related with the call processing to the mobile, to thereby set up a call that an operation station wants between the mobile station and the speech channel;

upon establishment of the call, checking the speech channel of a specific frequency or speech channels of all frequency, to report statistical data on the number of times of setting up a call, causes of call cancellation and the frame error rate of each speech channel to the operation station; and

detecting a poor speech channel depending on the statistical data.

10. The method as claimed in claim 9, wherein the plurality of test items includes a test item 1 for checking only the speech channel of the base station, a test item 2 for checking only the vocoder of the control station, and test items 3 and 4 for simultaneously checking the vocoder of the control station and the speech channel of the base station.

11. The method as claimed in claim 9, wherein, when the call cannot be established with the current service frequency of the mobile station in the step of judging if the call can be set up at the current service frequency of the mobile station, transmitting a channel assignment message to the mobile station to allow it to be able to establish a call with a specific frequency designated by the operation station, thereby setting up the call at the designated frequency.

12. A method for checking a speech channel of a base station and a vocoder of a control station in a mobile communication system, the method comprising the steps of:

in the event of selection of a test item for checking only the vocoder of the control station from a plurality of test items, selecting a specific control station or multiple control stations according to the selected test item;

transmitting data on a period of time for maintaining call setup, the number of times of attempting a call, the ID of a specific vocoder or IDs of multiple vocoders of the specific control station and an incoming loop back call to the control station;

receiving and analyzing the data, and transmitting the incoming loop back call from the control station to a mobile station;

judging if a message related with call processing has been received from the base station;

when the message related with call processing has been received from the base station, establishing a call through a vocoder designated by an operation station;

gathering statistical data on the number of times of setting up a call through the vocoder and speech channel, causes of call cancellation and the frame error rate of each vocoder by vocoders, and transmitting the statistical data to the operation station; and

detecting a poor vocoder from the multiple vocoders depending on the statistical data.

13. The method as claimed in claim 12, wherein the plurality of test items includes a test item 1 for checking only the speech channel of the base station, a test item 2 for checking only the vocoder of the control station, and test items 3 and 4 for checking the vocoder of the control station and the speech channel of the base station, simultaneously.

14. The method as claimed in claim 12, wherein, when a handoff request message is received from the mobile station while the call is set up through the designated vocoder, the control station transmits/receives a message related with handoff processing to/from the base station, to thereby respond to the handoff request message of the mobile station.

15. A method for checking a speech channel of a base station and a vocoder of a control station in a mobile communication system, the method comprising the steps of:

in the event of selection of a test item for simultaneously checking the vocoder of the control station and the speech channel of the base station from a plurality of test items, selecting a specific control station and base station or multiple control stations and base station according to the selected test item;

an operation station transmitting data on a period of time for maintaining call setup, the number of times of attempting a call, the ID of a specific vocoder or IDs of multiple vocoders of a specific control station, the kind of a call and the phone number of a called part to the control station and base station;

the base station and control station receiving and analyzing the data transmitted from the operation station, the control station processing a call selected by the operation station, the base station transmitting a message related with call processing to the control station;

upon reception of the message related with call processing, the control station setting up a call through a vocoder designated by the operation station, the base station judging if a test frequency is identical to a service frequency of a mobile station;

establishing the call through a speech channel designated by the operation station when the test frequency and the service frequency of the mobile station are identical to each other; and

gathering statistical data on the number of times of setting up a call through the vocoder and speech channel, causes of call cancellation and the frame error rate of each vocoder, and reporting the statistical data to the operations station.

16. The method as claimed in claim 15, wherein the the plurality of test items includes a test item 1 for checking only the speech channel of the base station, a test item 2 for checking only the vocoder of the control station, and test items 3 and 4 for simultaneously checking the vocoder of the control station and the speech channel of the base station.

17. The method as claimed in claim 15, wherein the kind of the call included in the data according to the selected test item corresponds to an incoming/outgoing loop back call or incoming/outgoing call.

18. The method as claimed in claim 15, wherein, when a handoff request message is received from the mobile station while the call is set up through the designated vocoder, the control station transmits/receives a message related with handoff processing to/from the base station, to thereby respond to the handoff request message of the mobile station.

19. The method as claimed in claim 15, wherein, when the test frequency is not identical to the service frequency of the mobile station, transmitting a channel assignment message to the mobile station to allow it to be able to set up a call with a specific frequency designated by the operation station, and establishing a call with the designated frequency.