HIGH RELIABILITY REDUNDANT VOTING SYSTEM FOR A SIGNAL RECEIVED BY VOTING PROCESSORS IN A COMMUNICATION SYSTEM

• US 20140173335A1
• Filed: 07/29/2011
• Published: 06/19/2014
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Dworakowski, Waldemar K, Kryger, Przemyslaw, Lichnerowicz, Andrzej, Mrowiec, Robert
• Granted Patent: US 9,189,347 B2
• Time in Patent Office: Days
• US Class Current: 714/4.11
• CPC Class Codes: G06F 11/2007 using redundant communication media
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition

Abstract

Disclosed are methods and systems for providing improved reliability via redundant voting systems. The voting systems are operable to vote on a signal received by a plurality of base stations in a communication system. A first voting processor transmits a message to the plurality of base stations indicating a return base station to voting processor (BS-VP) multicast address. A plurality of multicast messages addressed to the return multicast address are then received from the plurality of base stations and associated with a particular signal received from a signal source by each of the plurality of base stations. The first voting processor determines a recovered signal, and responsive to the first voting processor determining that the second voting processor is no longer operational, transmits the recovered signal to a voting processor to infrastructure (VP-IN) multicast address associated with an infrastructure device and the first and second voting processors.

Claims

1. A method for providing a redundant voting system for voting on a signal received by a plurality of base stations in a communication system, the method comprising:

a first voting processor transmitting a downstream message to a plurality of base stations indicating a return base station to voting processor (BS-VP) group associated with the first voting processor and a second voting processor;

receiving a plurality of group messages addressed to the return group from the plurality of base stations and associated with a particular signal received from a signal source by each of the plurality of base stations, the particular signal including an address of a target device to which the particular signal is directed;

the first voting processor determining a recovered signal, wherein the recovered signal comprises a representation of the received particular signal of at least one of the plurality of base stations having a quality measure better than a quality measure associated with each received particular signal from all other of the plurality of base stations; and

responsive to the first voting processor determining that the second voting processor is no longer operational, the first voting processor transmitting the recovered signal to a voting processor to infrastructure (VP-IN) group associated with an infrastructure device and the first and second voting processors.

2. The method of claim 1, wherein the first voting processor determining that the second voting processor is no longer operational comprises the first voting processor determining that the second voting processor has failed to transmit the recovered signal to the VP-IN group.

3. The method of claim 1, wherein the first voting processor is a backup voting processor disposed at a geographically disperse location relative to the second voting processor.

4. The method of claim 1, further comprising the first voting processor transmitting the received particular signal of the at least one of the plurality of base stations having the quality measure better than a quality measure associated with each received particular from all other of the plurality of base stations to an inter-voting-processor (VP) group associated with the first and second voting processors.

5. The method of claim 4, wherein the first voting processor determining that the second voting processor is no longer operational comprises the first voting processor determining that it has failed to receive from the second voting processor, via the VP group, a corresponding recovered signal calculated by the second voting processor.

6. The method of claim 1, further comprising the first voting processor monitoring an infrastructure to voting processor (IF-VP) group for messages directed to base stations and, responsive to detecting that the second voting processor has failed to further transmit a particular infrastructure message transmitted by the infrastructure to the IF-VP group to the base stations via a voting processor to base station (VP-BS) group, the first voting processor transmitting the particular infrastructure message to the base stations via the VP-BS group.

7. The method of claim 1, further comprising the first voting processor transmitting a first visibility table to the second voting processor indicating a first set of base stations visible to the first voting processor, and the first voting processor receiving a second visibility table from the second voting processor indicating a second set of base stations visible to the second voting processor.

8. The method of claim 7, further comprising, responsive to determining that the second visibility table from the second voting processor indicates a higher number of base stations in the second set visible to the second voting processor compared to a number of base stations in the first set visible to the first voting processor, designating the second voting processor an active voting processor for at least one particular base station channel and designating the first voting processor a backup voting processor for at least the one particular base station channel.

9. The method of claim 7, further comprising, responsive to determining that the second visibility table from the second voting processor indicates a same number of base stations in the second set visible to the second voting processor compared to a number of base stations in the first set visible to the first voting processor, comparing a network address of the first voting processor and second voting processor and responsive to determining that the second voting processor has one of a higher and a lower network address than the first voting processor, designating the second voting processor an active voting processor for at least one particular base station channel and designating the first voting processor a backup voting processor for at least the one particular base station channel.

10. The method of claim 1, further comprising the infrastructure providing the recovered signal to the target device.

11. The method of claim 1, further comprising one of (i) the infrastructure and (ii) one of the base stations eliminating a duplicate packet transmitted by one of the first and second voting processors due to one of (i) an erroneous determination that the other of the one of the first and second voting processors is no longer operational and (ii) a determination that the other of the one of the first and second voting processors is sending out lower signal quality information.

12. The method of claim 1, the first voting processor transmitting the recovered signal to the VP-IN group associated with the infrastructure device and the first and second voting processors comprises one of (i) the first voting processor transmitting the recovered signal to a VP-IN multicast address associated with the infrastructure device and the first and second voting processors, (ii) the first voting processor transmitting the recovered signal to a broadcast address and including information in one of a header and payload indicating the infrastructure device and the first and second voting processors as intended recipients, and (iii) the first voting processor retrieving a list of unicast addresses associated with members of the VP-IN group and transmitting the recovered signal to the each of the infrastructure device and the first and second voting processors via a plurality of respective unicast transmissions to the unicast addresses in the list.

18. The communication system of claim 12, wherein the first voting processor is further configured to monitor an infrastructure to voting processor (IF-VP) group for messages directed to base stations and, responsive to detecting that the second voting processor has failed to further transmit a particular infrastructure message transmitted by the infrastructure to the IF-VP group to the base stations via a voting processor to base station (VP-BS) group, the first voting processor transmitting the particular infrastructure message to the base stations via the VP-BS group.

19. The communication system of claim 12, wherein the first voting processor is further configured to transmit a first visibility table to the second voting processor indicating a first set of base stations visible to the first voting processor, and the first voting processor receiving a second visibility table from the second voting processor indicating a second set of base stations visible to the second voting processor.

20. The communication system of claim 19, wherein the first voting processor is further configured to transmit the recovered signal to the voting processor to infrastructure (VP-IN) group associated with an infrastructure device and the first and second voting processors by one of:

(i) transmitting the recovered signal to a VP-IN multicast address associated with the infrastructure device and the first and second voting processors,

(ii) transmitting the recovered signal to a broadcast address and including information in one of a header and payload indicating the infrastructure device and the first and second voting processors as intended recipients, and

(iii) retrieving a list of unicast addresses associated with members of the VP-IN group and transmitting the recovered signal to the each of the infrastructure device and the first and second voting processors via a plurality of respective unicast transmissions to the unicast addresses in the list.

13. A communication system for providing a redundant voting processors for voting on a signal received by a plurality of base stations in a communication system, the communication system comprising:

a first voting processor configured to;

transmit a message to a plurality of base stations indicating a return base station to voting processor (BS-VP) group associated with the first voting processor and a second voting processor;

receive a plurality of group messages addressed to the return group from the plurality of base stations and associated with a particular signal received from a signal source by each of the plurality of base stations, the particular signal including an address of a target device;

determine a recovered signal, wherein the recovered signal comprises a representation of the received particular signal of at least one of the plurality of base stations having a quality measure better than a quality measure associated with each received particular signal from all other of the plurality of base stations; and

responsive to making a determination that the second voting processor is no longer operational, transmit the recovered signal to a voting processor to infrastructure (VP-IN) group associated with an infrastructure device and the first and second voting processors.

14. The communication system of claim 13, wherein the first voting processor is configured to make the determination that the second voting processor is no longer operational by determining that the second voting processor has failed to transmit the recovered signal to the VP-IN group.

15. The communication system of claim 13, wherein the first voting processor is a backup voting processor disposed at a geographically disperse location relative to the second voting processor.

16. The communication system of claim 13, wherein the first voting processor is further configured to transmit the received particular signal of the at least one of the plurality of base stations having the quality measure better than a quality measure associated with each received particular signal from all other of the plurality of base stations to an inter-voting-processor (VP) group associated with the first and second voting processors.

17. The communication system of claim 16, wherein the first voting processor is configured to determine that the second voting processor is no longer operational by determining that it has failed to receive from the second voting processor, via the VP group, a corresponding recovered signal calculated by the second voting processor.