System and method for selective recovery of a failed overhead channel in a wireless network

• US 6,496,475 B1
• Filed: 07/16/1999
• Issued: 12/17/2002
• Est. Priority Date: 07/16/1999
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Thao, Laly, Ji, Li
• Primary Examiner(s): Vanderpuye, Ken
• Application Number:
  US09/354,490
• Time in Patent Office: 1,250 Days
• Field of Search: 370/227, 370/228, 370/216, 370/225, 370/221, 370/219, 370/220, 370/217, 370/218
• US Class Current: 370/216
• CPC Class Codes: H04L 1/22 using redundant apparatus to increase reliability

Abstract

An apparatus is disclosed for use in a wireless network base station capable of recovering from an overhead channel failure. The apparatus comprising a channel allocator circuit capable of (i) identifying a failed one of a plurality of channel elements responsible for a failed overhead channel and a first signal processing device associated with the failed overhead channel element; and (ii) selecting an available traffic channel element to replace the failed channel element, wherein the available traffic channel element is located on a second signal processing device that is processing a least number of overhead channels thereon.

Claims

1. For use in a base station of a wireless network, said base station capable of communicating in at least one overhead channel and a plurality of traffic channels with a plurality of mobile stations by means of a plurality of channel elements, an apparatus for recovering from an overhead channel failure comprising:

a failure detection circuit capable of detecting a failed overhead channel and generating a failure notification; and

a channel allocator capable of receiving said failure notification and, in response thereto;

identifying a failed one of said plurality of channel elements responsible for said failed overhead channel and a first signal processing device associated with said failed overhead channel element;

selecting an available traffic channel element to replace said failed channel element, wherein said available traffic channel element is located on a second signal processing device that is processing a least number of overhead channels thereon.

2. The apparatus set forth in claim 1 wherein said second signal processing device and said first signal processing device comprise distinct digital signal processors.

3. The apparatus set forth in claim 2 wherein said second signal processing device and said first signal processing device comprise distinct digital signal processors disposed on separate channel card circuits.

4. The apparatus set forth in claim 1 wherein said least number of overhead channels is one.

5. The apparatus set forth in claim 1 wherein said available traffic channel element is an idle traffic channel element.

6. The apparatus set forth in claim 1 wherein said second signal processing device and said first signal processing device are disposed on separate channel cards.

7. The apparatus set forth in claim 1 further comprising a database associated with said channel allocator, wherein said database stores physical device location parameters associated with said plurality of channel elements.

8. The apparatus set forth in claim 1 wherein said channel allocator causes said available traffic channel element to be reconfigured as an overhead channel capable of replacing said failed overhead channel.

9. A wireless network comprising:

a plurality of base stations, each of said base stations capable of establishing and maintaining communication links with a plurality of a mobile stations by means of at least one overhead channel and a plurality of traffic channels; and

an apparatus for recovering from an overhead channel failure comprising;

a failure detection circuit capable of detecting a failed overhead channel and generating a failure notification; and

a channel allocator capable of receiving said failure notification and, in response thereto;

identifying a failed one of said plurality of channel elements responsible for said failed overhead channel and a first signal processing device associated with said failed overhead channel element;

selecting an available traffic channel element to replace said failed channel element, wherein said available traffic channel element is located oh a second signal processing device that is processing a least number of overhead channels thereon.

10. The wireless network set forth in claim 9 wherein said second signal processing device and said first signal processing device comprise distinct digital signal processors.

11. The wireless network set forth in claim 10 wherein said second signal processing device and said first signal processing device comprise distinct digital signal processors disposed on separate channel card circuits.

12. The wireless network set forth in claim 9 wherein said least number of overhead channels is one.

13. The wireless network set forth in claim 9 wherein said available traffic channel element is an idle traffic channel element.

14. The wireless network set forth in claim 9 wherein said second signal processing device and said first signal processing device are disposed on separate channel cards.

15. The wireless network set forth in claim 9 further comprising a database associated with said channel allocator, wherein said database stores physical device location parameters associated with said plurality of channel elements.

16. The wireless network set forth in claim 9 wherein said channel allocator causes said available traffic channel element to be reconfigured as an overhead channel capable of replacing said failed overhead channel.

17. For use in a base station of a wireless network, the base station capable of communicating in at least one overhead channel and a plurality of traffic channels with a plurality of mobile stations by means of a plurality of channel elements, a method for recovering from an overhead channel failure comprising the steps of:

detecting a failed overhead channel;

identifying a failed one of the plurality of channel elements responsible for the failed overhead channel;

identifying a first signal processing device associated with the failed overhead channel element;

determining a pool of available traffic channel elements capable of being reconfigured to replace the failed overhead channel element; and

selecting from the pool a replacement traffic channel element, wherein the replacement traffic channel element is located on a second signal processing device that is processing a least number of overhead channels.

18. The method set forth in claim 17 wherein the second signal processing device and the first signal processing device comprise distinct digital signal processors.

19. The method set forth in claim 17 wherein the second signal processing device and the first signal processing device comprise distinct digital signal processors disposed on separate channel card circuits.

20. The method set forth in claim 17 wherein the step of determining a pool of available traffic channel elements comprises the step of determining which ones of the plurality of channel element are idle.

21. For use in a base station of a wireless network, said base station capable of communicating in at least one overhead channel and a plurality of traffic channels with a plurality of mobile stations by means of a plurality of channel elements, an apparatus for recovering from an overhead channel failure operable to (i) identify a failed one of a plurality of channel elements responsible for a failed overhead channel and a first signal processing device associated with a failed overhead channel element, and (ii) select, in response thereto, an available traffic channel element to replace said failed channel element, wherein said available traffic channel element is located on a second signal processing device that is processing a least number of overhead channels thereon.

22. The apparatus set forth in claim 21 wherein said second signal processing device and said first signal processing device comprise distinct digital signal processors.

23. The apparatus set forth in claim 22 wherein said second signal processing device and said first signal processing device comprise distinct digital signal processors disposed on separate channel card circuits.

24. The apparatus set forth in claim 21 wherein said least number of overhead channels is one.

25. The apparatus set forth in claim 21 wherein said available traffic channel element is an idle traffic channel element.

26. The apparatus set forth in claim 21 wherein said second signal processing device and said first signal processing device are disposed on separate channel cards.

27. The apparatus set forth in claim 21 further comprising a database operable to store physical device location parameters associated with said plurality of channel elements.

28. The apparatus set forth in claim 21 wherein said available traffic channel element to be reconfigured as an overhead channel capable of replacing said failed overhead channel.