System and method for dynamic channel allocation

• US 10,004,082 B2
• Filed: 07/05/2017
• Issued: 06/19/2018
• Est. Priority Date: 11/06/2014
• Status: Active Grant

• Current Assignee: E F Johnson Company (JVC Kenwood Corporation)
• Original Assignee: E F Johnson Company (JVC Kenwood Corporation)
• Inventors: Bane, Ronald Lee, Austin, Brian J.
• Primary Examiner(s): MITCHELL, NATHAN A
• Application Number:
  US15/641,747
• Publication Number:
  US 20170311336A1
• Time in Patent Office: 349 Days
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 72/563 of the wireless resources
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

An exemplary system and method for dynamic channel allocation in an LMR system includes using one or more preference indicators to dynamically determine a channel allocation priority to be used for channel allocation when channel allocation requests are received. The preference indicators may include a channel failure indicator (e.g. a channel health indicator based on repeater failures), a channel priority indicator, a radio frequency interference indicator, a high reflected power indicator, an excessive current drain indicator, a loss of backbone communications indicator, and a channel usage indicator. If more than one preference indicator is used, the channel priority ranking may be determined using any of a variety of weightings and prioritizations of the various preference indicators to dynamically generate the channel allocation priority. The dynamic channel allocation system may include one or more site controllers, servers, and/or one or more processors configured to implement the method of dynamic channel allocation.

Claims

1. A method for dynamic channel allocation in a land mobile radio communications system, the method comprising:

determining one or more preference indicators for each of a plurality of channels for use in allocating the plurality of channels, wherein each of the plurality of channels is associated with one or more repeaters of a plurality of repeaters of the land mobile radio communications system;

determining a priority ranking for use in allocating each of the plurality of channels based at least in part on the one or more preference indicators;

receiving a first channel allocation request to allocate one of the plurality of channels;

allocating a first one of the plurality of channels in response to the first channel allocation request by selecting the first one of the plurality of channels based on a then highest ranked channel of the priority ranking used in allocating each of the plurality of channels.

2. The method of dynamic channel allocation according to claim 1, further comprising:

updating the priority ranking for use in allocating each of the plurality of channels based at least in part on changes to the one or more preference indicators.

3. The method of dynamic channel allocation according to claim 1, further comprising:

periodically updating the priority ranking for use in allocating each of the plurality of channels.

4. The method of dynamic channel allocation according to claim 1, further comprising:

updating the priority ranking for use in allocating each of the plurality of channels based at least in part on changes in at least two or more of the preference indicators.

5. The method of dynamic channel allocation according to claim 1, wherein at least one of the one or more preference indicators includes a channel failure indicator at least one of the plurality of channels that corresponds to a current operational state of the plurality of repeaters associated with that channel.

6. The method of dynamic channel allocation according to claim 5, wherein the channel failure indicator is determined for each of the plurality of channels and is based on the percentage of operational repeaters associated with a particular channel as compared to the total number of repeaters associated with that particular channel.

7. The method of dynamic channel allocation according to claim 1, wherein the one or more preference indicators includes at least one from a group comprising a channel failure indicator, a channel priority indicator, and a radio frequency interference indicator.

8. The method of dynamic channel allocation according to claim 1, wherein the one or more preference indicators includes a channel failure indicator for each of the plurality of channels that corresponds to a current operational state of the plurality of repeaters associated with each channel, and a channel priority indicator that includes a static ranking of each of the plurality of channels.

9. The method of dynamic channel allocation according to claim 1, wherein the one or more preference indicators includes a channel priority indicator that includes a static ranking of each of the plurality of channels.

10. The method of dynamic channel allocation according to claim 1, wherein the one or more preference indicators includes a radio frequency interference indicator that corresponds to radio frequency interference levels for each of the plurality of channels.

11. The method of dynamic channel allocation according to claim 1, wherein the one or more preference indicators include a high reflected power indicator that corresponds to reflected power levels related to each of the plurality of channels.

12. The method of dynamic channel allocation according to claim 1, wherein the one or more preference indicators include at least one from a group that comprises a channel failure indicator, a channel priority indicator, a radio frequency interference indicator, a high reflected power indicator, an excessive current drain indicator, a loss of backbone communications indicator, and a channel usage indicator.

13. The method of dynamic channel allocation according to claim 1, wherein the land mobile radio communications system is a simulcast land mobile radio communications system.

14. The method of dynamic channel allocation according to claim 1, wherein the land mobile radio communications system includes a plurality of sites positioned at separate locations and in data communication with one another using a data communications network.

15. The method of dynamic channel allocation according to claim 14, wherein the data communications network is a backbone data communications network.

16. The method of dynamic channel allocation according to claim 1, wherein the priority ranking for use in allocating each of the plurality of channels is determined based on a weighted average of at least a first preference indicator and a second preference indicator of the one or more preference indicators.

17. The method of dynamic channel allocation according to claim 1, wherein determining the priority ranking for use in allocating each of the plurality of channels is based on a weighted average of at least a first preference indicator and two or more of the indicators from the group consisting of a channel priority indicator, a radio frequency interference indicator, a high reflected power indicator, an excessive current drain indicator, a loss of backbone communications indicator, and a channel usage indicator.

18. A method for dynamic channel allocation in a land mobile radio communications system, the method comprising:

determining a first preference indicator for each of a plurality of channels for use in allocating the plurality of channels, wherein each of the plurality of channels is associated with one or more repeaters of the land mobile radio communications system, and wherein the first preference indicator includes a channel failure indicator for each of the plurality of channels that corresponds to a current operational state of the one or more repeaters associated with each such channel;

determining a priority ranking for use in allocating each of the plurality of channels based at least in part on the first preference indicator that includes the channel failure indicator for each of the plurality of channels;

receiving a channel allocation request; and

allocating a channel in response to the channel allocation request by selecting an available channel based on the priority ranking for allocating each of the plurality of channels.

19. The method of dynamic channel allocation according to claim 18, further comprising determining a second preference indicator for each of the plurality of channels for use in allocating the plurality of channels associated with the one or more repeaters, wherein the second preference indicator is associated with each of the plurality of channels and includes one or more from the group consisting of a channel priority indicator, a radio frequency interference indicator, and a high reflected power indicator;

and wherein determining the priority ranking for use in allocating each of the plurality of channels is based at least in part on both the first preference indicator and the second preference indicator.

20. The method of dynamic channel allocation according to claim 19, wherein the second preference indicator for use in allocating the plurality of channels is the radio frequency interference indicator that corresponds to radio frequency interference levels for each of the plurality of channels.

21. The method of dynamic channel allocation according to claim 19, wherein the second preference indicator for use in allocating the plurality of channels is the high reflected power indicator that corresponds to reflected power levels related to each of the plurality of channels.

22. The method of dynamic channel allocation according to claim 18, further comprising:

periodically determining the priority ranking for use in allocating each of the plurality of channels based at least in part on the first preference indicator that includes the channel failure indicator for each of the plurality of channels.

23. The method of dynamic channel allocation according to claim 18, further comprising:

updating the priority ranking for use in allocating each of the plurality of channels based at least in part on changes in the first preference indicator.

24. The method of dynamic channel allocation according to claim 19, further comprising:

updating the priority ranking for use in allocating each of the plurality of channels based at least in part on changes in the first preference indicator or the second preference indicator.

25. The method of dynamic channel allocation according to claim 18, wherein the allocated channel is a control channel.

26. The method of dynamic channel allocation according to claim 18, wherein the channel failure indicator is determined for each of the plurality of channels and is based on the percentage of operational repeaters associated with a particular channel as compared to the total number of repeaters associated with that particular channel.

27. The method of dynamic channel allocation according to claim 18, wherein determining the priority ranking for use in allocating each of the plurality of channels is based on a weighted average that includes at least the first preference indicator and the second preference indicator.

28. The method of dynamic channel allocation according to claim 19, wherein determining the priority ranking for use in allocating each of the plurality of channels is based on a weighted average of the first preference indicator and two or more of the indicators from the second preference indicator from the group consisting of the channel priority indicator, the radio frequency interference indicator, a high reflected power indicator, an excessive current drain indicator, a loss of backbone communications indicator, and a channel usage indicator.

29. A land mobile radio communications system with dynamic channel allocation to provide mobile communications between at least two of a plurality of radio subscriber units, the land mobile radio communications system comprising:

one or more processors configured to provide dynamic channel allocation, the one or more processors configured to;

determine one or more preference indicators for each of the plurality of channels for use in allocating the plurality of channels, wherein each of the plurality of channels is associated with one or more repeaters of a plurality of repeaters of the land mobile radio communications system;

determine a priority ranking for use in allocating each of the plurality of channels based at least in part on the one or more preference indicators;

receive a first channel allocation request to allocate one of the plurality of channels as a control channel;

allocate a first one of the plurality of channels as the control channel in response to the first channel allocation request by selecting the first one of the plurality of channels based on the highest ranked channel of the priority ranking for use in allocating each of the plurality of channels;

receive a second channel allocation request to allocate one of the plurality of channels as a traffic channel while the first one of the plurality of channels is allocated as the control channel; and

allocate a second one of the plurality of channels as the traffic channel in response to the second channel allocation request by selecting the second one of the plurality of channels based on the then highest ranked channel of the priority ranking for use in allocating each of the plurality of channels.

30. The land mobile radio communications system of claim 29, wherein the land mobile radio communications system is a P25 trunking system.

31. The land mobile radio communications system of claim 29, wherein the one or more processors are further configured to:

update the priority ranking for use in allocating each of the plurality of channels based at least in part on changes to the one or more preference indicators.

32. The land mobile radio communications system of claim 29, wherein the one or more processors are further configured to:

periodically update the priority ranking for use in allocating each of the plurality of channels.

33. The land mobile radio communications system of claim 29, wherein the one or more processors are further configured to:

update the priority ranking for use in allocating each of the plurality of channels based at least in part on changes in at least two or more of the one or more preference indicators.

34. The land mobile radio communications system of claim 29, wherein the one or more preference indicators includes at least one from a group that comprises a channel failure indicator, a channel priority indicator, a radio frequency interference indicator, and a high reflected power indicator.

35. The land mobile radio communications system of claim 29, wherein the one or more preference indicators includes a channel failure indicator for each of the plurality of channels that corresponds to the current operational state of the plurality of repeaters associated with each channel, and a channel priority indicator that includes a static ranking of each of the plurality of channels.

36. The land mobile radio communications system of claim 29, wherein the one or more preference indicators include a channel priority indicator that includes a static ranking of each of the plurality of channels.

37. The land mobile radio communications system of claim 29, wherein the one or more preference indicators includes at least one from a group that comprises a channel failure indicator, a channel priority indicator, a radio frequency interference indicator, a high reflected power indicator, an excessive current drain indicator, a loss of backbone communications indicator, and a channel usage indicator.

38. The land mobile radio communications system of claim 29, wherein the land mobile radio communications system is a simulcast land mobile radio communications system.