Method and apparatus for mitigating port swapping during signal tracking

• US 8,588,220 B2
• Filed: 12/30/2005
• Issued: 11/19/2013
• Est. Priority Date: 12/30/2005
• Status: Expired due to Fees

• Current Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Original Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Inventors: Thornton, Steven D., Holden, Brian, Adams, John A.
• Primary Examiner(s): Banks Harold, Marsha D
• Assistant Examiner(s): WYLLIE, CHRISTOPHER T
• Application Number:
  US11/323,608
• Publication Number:
  US 20070153779A1
• Time in Patent Office: 2,881 Days
• Field of Search: 370/335, 370/342, 370/449, 455/277.1, 455/12.1
• US Class Current: 370/359
• CPC Class Codes: H04W 28/00 Network traffic management; Network resource management
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Embodiments of the present invention provide a method and apparatus for mitigating port swapping during signal tracking. The method and apparatus generally include acquiring a first signal characteristic corresponding to a signal assigned to a first port, comparing the first signal characteristic to a second previously acquired signal characteristic, and assigning the signal to a second port if the first and second signal characteristics vary. Such a configuration mitigates port swapping without requiring signals to include identification information, thereby enabling assignment of signals corresponding to any format or source.

Claims

1. A method of mitigating port swapping during signal tracking, the method comprising:

assigning a received wireless signal to a first port of a computing element;

repeatedly acquiring signal characteristics of the signal and storing the acquired signal characteristics in a memory component;

comparing a first one of the signal characteristics stored in the memory component to a second one of the signal characteristics stored in the memory component, the second one of the signal characteristics being acquired earlier in time than the first one of the signal characteristics;

if the first and second signal characteristics vary, assigning the signal to a second port; and

comparing a third one of the signal characteristics stored in the memory component to the first one of the signal characteristics stored in the memory component, the third one of the signal characteristics being acquired at a different time than the first one and the second one of the signal characteristics, and if the third and first signal characteristics vary, assigning the signal to the second port,

wherein the signal is not present on the first port unless the signal has been assigned to the first port, the signal is not present on the second port unless the signal has been assigned to the second port, wherein the first signal characteristic is selected from the group consisting of a geolocation, an angle of arrival, a direction of arrival, a time difference of arrival, a frequency difference of arrival, and combinations thereof.

2. The method of claim 1, wherein the signal is assigned to the second port if the first and second signal characteristics vary by a predetermined amount.

3. The method of claim 1, further including—

acquiring a first set of signal characteristics corresponding to a plurality of signals assigned to a plurality of ports,

comparing the first set to a second set of previously acquired signal characteristics, and

assigning signals to the ports based on variances between the signals within the first set and the signals within the second set.

4. The method of claim 3, wherein signals having characteristics that exceed a minimum variance between acquired and previously acquired signal characteristics are assigned to different ports and signals having characteristics that correspond to minimum variances between acquired and previously acquired signal characteristics are retained on the same ports.

5. The method of claim 1, wherein the signal corresponds to an audio signal and the ports correspond to audio ports.

15. The method of claim 1, wherein the first port corresponds to a channel of a first network connection and the second port corresponds to a channel of a second network connection.

6. A computing element operable to mitigate port swapping during signal tracking, the computing element comprising:

a first port;

a second port;

a memory; and

a processor coupled with the memory and the ports, the processor operable to—

repeatedly acquire signal characteristics corresponding to the signal assigned to the first port and store the signal characteristics in the memory,

compare a first one of the signal characteristics stored in the memory to a second one of the signal characteristics stored in the memory, the second one of the signal characteristics being acquired earlier in time than the first one of the signal characteristics,

if the first and second signal characteristics vary, assign the signal to the second port,

compare acquire a third one of the signal characteristics stored in the memory to the first one of the signal characteristics stored in the memory, the third one of the signal characteristics being acquired at a different time than the first one and the second one of the signal characteristics,

and

if the third and first signal characteristics vary, assign the signal to the second port,

wherein the signal is not present on the first port unless the signal has been assigned to the first port, and the signal is not present on the second port unless the signal has been assigned to the second port, wherein the first signal characteristic is selected from the group consisting of a geolocation, an angle of arrival, a direction of arrival, a time difference of arrival, a frequency difference of arrival, and combinations thereof.

7. The computing element of claim 6, wherein the processor is operable to be coupled with a collector element to acquire at least one of the signal characteristics.

8. The computing element of claim 6, wherein the processor assigns the signal to the second port if the first signal and second signal characteristics vary by a predetermined amount.

9. The computing element of claim 6, wherein the signal corresponds to an audio signal and the ports correspond to audio ports.

16. The computing element of claim 6, wherein the first port corresponds to a channel of a first network connection and the second port corresponds to a channel of a second network connection.

10. A non-transitory computer-readable medium having stored thereon a computer program for mitigating port swapping during signal tracking, the computer-readable medium comprising:

a code segment operable to be executed by the computing element to repeatedly acquire signal characteristics corresponding to a signal assigned to a first port and to store the signal characteristics in a memory;

a code segment operable to be executed by the computing element to compare a first one of the signal characteristics stored in the memory to a second one of the signal characteristics stored in the memory, the second one of the signal characteristics being acquired earlier in time than the first one of the signal characteristics;

a code segment operable to be executed by the computing element to assign the signal to a second port if the first and second signal characteristics vary;

a code segment operable to be executed by the computing element to compare a third one of the signal characteristics stored in the memory to the first one of the signal characteristics stored in the memory, the third one of the signal characteristics being acquired at a different time than the first one and the second one of the signal characteristics; and

a code segment operable to be executed by the computing element to assign the signal to the second port if the third and first signal characteristics vary,

wherein the signal is not present on the first port unless the signal has been assigned to the first port, and the signal is not present on the second port unless the signal has been assigned to the second port, wherein the first signal characteristic is selected from the group consisting of a geolocation, an angle of arrival, a direction of arrival, a time difference of arrival, a frequency difference of arrival, and combinations thereof.

11. The non-transitory computer-readable medium of claim 10, wherein the code segment assigns the signal to the second port if the first and second signal characteristics vary by a predetermined amount.

12. The non-transitory computer-readable medium of claim 10, further comprising—

a code segment operable to be executed by the computing element to acquire a first set of signal characteristics corresponding to a plurality of signals assigned to a plurality of ports,

a code segment operable to be executed by the computing element to compare the first set to a second set of previously acquired signal characteristics, and

a code segment operable to be executed by the computing element to assign signals to the ports based on variances between the signals within the first set and the signals within the second set.

13. The non-transitory computer-readable medium of claim 10, wherein the signal corresponds to an audio signal and the ports correspond to audio ports.

17. The computer-readable medium of claim 10, wherein the first port corresponds to a channel of a first network connection and the second port corresponds to a channel of a second network connection.

14. A computing element operable to mitigate port swapping during signal tracking, the computing element comprising:

a first port;

a second port;

a memory operable to store a second signal characteristic corresponding to a first signal assigned to the first port and a third signal characteristic corresponding to a second signal assigned to the second port; and

a processor coupled with the memory and the ports, the processor operable to—

acquire a first signal characteristic corresponding to the first signal,

compare the first and second signal characteristics,

if the first and second signal characteristics vary, assign the first signal to the second port,

acquire a fourth signal characteristic corresponding to the second signal,

compare the fourth signal characteristic to the second and third signal characteristics, and

if the fourth signal characteristic varies from the third signal characteristic more than the second signal characteristic, assign the second signal to the first port and assign the first signal to the second port,

wherein the signal is not present on the first port unless the signal has been assigned to the first port, the signal is not present on the second port unless the signal has been assigned to the second port, the second signal is not present on the first port unless the second signal has been assigned to the first port, the second signal is not present on the second port unless the second signal has been assigned to the second port, wherein the first signal characteristic is selected from the group consisting of a geolocation, an angle of arrival, a direction of arrival, a time difference of arrival, a frequency difference of arrival, and combinations thereof.

18. The computing element of claim 14, wherein the first port corresponds to a channel of a first network connection and the second port corresponds to a channel of a second network connection.

19. A computing element operable to mitigate port swapping during signal tracking, the computing element comprising:

a first port comprising a channel of a first network connection;

a second port comprising a channel of a second network connection;

a memory; and

a processor coupled with the memory and the ports, the processor operable to—

repeatedly acquire the signal characteristics corresponding to the signal and store the signal characteristics in the memory,

compare a first one of the signal characteristics stored in the memory and second one of the signal characteristics stored in the memory, the second one of the signal characteristics being acquired earlier in time than the first one of the signal characteristics,

if the first and second signal characteristics vary, assign the signal to the second port,

compare a third one of the signal characteristics stored in the memory to the first one of the signal characteristics stored in the memory, the third one of the signal characteristics being acquired at a different time than the first one and the second one of the signal characteristics,

compare the third signal characteristic to the first signal characteristic, and

if the third and first signal characteristics vary, assign the signal to the second port,

wherein the signal is not present on the first port unless the signal has been assigned to the first port, and the signal is not present on the second port unless the signal has been assigned to the second port, wherein the first signal characteristic is selected from the group consisting of a geolocation, an angle of arrival, a direction of arrival, a time difference of arrival, a frequency difference of arrival, and combinations thereof.