Method and system for management of frequency spectrum among multiple applications on a shared medium

• US 5,608,727 A
• Filed: 05/02/1995
• Issued: 03/04/1997
• Est. Priority Date: 05/02/1995
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Chen, Albert, Labowicz, Eva, Perreault, John A., Joshi, Abhay
• Primary Examiner(s): Safourek, Benedict V.
• Assistant Examiner(s): TON, DANG T
• Application Number:
  US08/433,878
• Time in Patent Office: 672 Days
• Field of Search: 370/69.1, 370/17, 370/50, 370/44.1, 370/60, 370/18, 370/20, 370/21, 370/118, 370/95.1, 370/95.2, 370/95.3, 370/85.7, 370/85.8, 375/200, 375/201, 375/202, 375/203, 375/204, 375/205, 375/240, 348/384, 455/34.1, 455/54.2
• US Class Current: 370/462
• CPC Class Codes: H04J 1/12 Arrangements for reducing cross-talk between channels in line transmission systems H04B3/32; in cables or lines H04B3/26 - H04B3/30
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters

Abstract

Frequency spectrum management provides for dynamic spectrum usage adjustment among applications on a shared medium. Dynamic resource management methods are applied to the problem of managing spectrum and matching application specific requirements to real-time spectrum characteristics so that more optimal use of the available spectrum may be made. At least a first spectrum agent is assigned to each of the plurality of different applications, for managing channels allocated to the application, and a spectrum manager allocates frequency channels to the plurality of different applications based on the following at least one of parameters of a frequency channel required to implement the application and predetermined requirements based on time of day demand changes for the application.

Claims

1. A method of efficient management of a channel pool that is allocated among a plurality of different applications and has a predetermined number of frequency channels for a plurality of users in a communication system, wherein spectrum frequency of the channel pool is dynamically spread among the plurality of different applications to optimize provision of application requirements for the plurality of different applications in use, comprising the steps of:

A) assigning at least a first spectrum agent to each of the plurality of different applications, for managing channels allocated to the application;

B) allocating, by a spectrum manager, frequency channel/channels to the plurality of different applications based on the following at least one of;

B1) parameters of a frequency channel required to implement an application of the plurality of different applications; and

B2) predetermined requirements based on time of day demand changes for the application,

wherein the at least first spectrum agent monitors all frequency channels currently allocated to the at least first spectrum agent and maintains current information for quality and usage metrics for each of the frequency channels allocated for the use of the application assigned to the at least first spectrum agent.

2. The method of claim 1 wherein coaxial cable is utilized to couple at least some of the plurality of users to the communication system.

3. The method of claim 1 wherein fiber optic cable is utilized to couple at least some of the plurality of users to the communication system.

4. The method of claim 1 wherein the parameters of the frequency channel required to implement the application include at least one of:

quality, bandwidth and intermediate frequency.

5. The method of claim 1 wherein time of day requirements are based on one of:

a requirement reconfigured for the application at predetermined times of day, and

historical information on the application'"'"'s time of day requirements.

6. The method of claim 1 wherein, in accordance with a predetermined scheme, the at least first spectrum agent classifies the channels assigned to the at least first spectrum agent'"'"'s application as one of:

assigned, available and out of service and conveying the information to the spectrum manager.

7. The method of claim 6 wherein the at least first spectrum agent further reassigns out of service channels to applications having more lenient quality requirements than the application for which a channel was classified out of service.

8. The method of claim 6 wherein the at least first spectrum manager further reassigns an out of service frequency channel of one application to an available channel from another application having more lenient quality requirements.

9. The method of claim 1 including requesting, by the spectrum manager, at least one spectrum agent of the plurality of spectrum agents to return a particular channel allocated to the at least one spectrum agent.

10. The method of claim 1 including requesting, by the spectrum manager at least one of:

at least one channel; and

at least one prioritizing channel for a specific application based on the characteristics of the channel.

11. The method of claim 1 including rate-adjusting, by the at least first spectrum agent, a frequency channel and return a selected portion of the channel to the channel pool in response to a request by the spectrum manager.

12. The method of claim 1 including assigning, by the at least first spectrum agent, in response to a request by the spectrum manager, more users of one application to a frequency channel and returning previously allocated channel/channels for the users for assignment to other applications.

13. The method of claim 1 wherein predetermined priorities are assigned to the plurality of different applications in accordance with a predetermined scheme.

14. The method of claim 13 wherein predetermined priorities are further assigned to individual users of the plurality of different applications in accordance with the predetermined scheme.

15. The method of claim 1 including reallocating, by the at least first spectrum agent, channels that become available by decreasing service to its set of users, while still meeting a predetermined minimum level of service and returning the channels to the spectrum manager upon request.

16. A system for efficient management of a channel pool that is allocated among a plurality of different applications and has a predetermined number of frequency channels for a plurality of users in a communication system, wherein spectrum frequency of the channel pool is dynamically spread among the plurality of different applications to optimize provision of application requirements for the plurality of different applications in use, the system comprising:

a spectrum manager, for distributing, and dynamically allocating spectrum frequency among the plurality of users, in accordance with a predetermined scheme and

a plurality of spectrum agents, operably coupled to the spectrum manager and to the plurality of users, wherein the plurality of spectrum agents assign frequency channel/channels for different applications to the plurality of users in a predetermined service area, in accordance with the predetermined scheme, wherein the predetermined scheme includes;

A) assigning at least a first spectrum agent of the plurality of spectrum agents to each of the plurality of different applications, for managing channels allocated to an application of the plurality of different applications;

B) allocating, by the spectrum manager, frequency channel/channels to the plurality of different applications based on the following at least one of;

B1) parameters of a frequency channel required to implement the application; and

B2) predetermined requirements based on time of day demand changes for the application

wherein the at least first spectrum agent monitors all frequency channels currently allocated to the at least first spectrum agent and maintains current information for quality and usage metrics for each of the frequency channels allocated for the use of the application assigned to the at least first spectrum agent.

17. The system of claim 16 wherein coaxial cable is utilized to couple at least some of the plurality of users to the communication system.

18. The system of claim 16 wherein fiber optic cable is utilized to couple at least some of the plurality of users to the communication system.

19. The system of claim 16 wherein the parameters of the frequency channel required to implement the application include at least one of:

quality, bandwidth and intermediate frequency.

20. The system of claim 16 wherein time of day requirements are based on one of:

a requirement reconfigured for the application at predetermined times of day, and

historical information on the application'"'"'s time of day requirements.

21. The system of claim 16 wherein, in accordance with a predetermined scheme, the at least first spectrum agent classifies the channels assigned to the at least first spectrum agent'"'"'s application as one of:

assigned, available and out of service and conveys the information to the spectrum manager.

22. The system of claim 21 wherein the at least first spectrum agent further reassigns out of service channels to the plurality of different applications having more lenient quality requirements than the application for which a channel was classified out of service.

23. The system of claim 21 wherein the at least first spectrum agent further reassigns an out of service frequency channel of one application to an available channel from another application having more lenient quality requirements.

24. The system of claim 16 including requesting, by the spectrum manager, at least one spectrum agent of the plurality of spectrum agents to return a particular channel allocated to the at least one spectrum agent.

25. The system of claim 16 including requesting, by the spectrum manager at least one of:

at least one channel; and

at least one prioritizing channel for a specific application based on the characteristics of the channel.

26. The system of claim 16 including rate-adjusting, by the at least first spectrum agent, a frequency channel and returning a selected portion of a channel to the channel pool in response to a request by the spectrum manager.

27. The system of claim 16 including assigning, by the at least first spectrum agent, in response to a request by the spectrum manager, more users of one application to a frequency channel and returning previously allocated channel/channels for the users for assignment to other applications.

28. The system of claim 16 wherein predetermined priorities are assigned to the plurality of different applications in accordance with a predetermined scheme.

29. The system of claim 28 wherein predetermined priorities are further assigned to individual users of the plurality of different applications in accordance with the predetermined scheme.

30. The system of claim 16 including reallocating, by the at least first spectrum agent, channels that become available by decreasing service to the at least first spectrum agent'"'"'s set of users, while still meeting a predetermined minimum level of service and returning said channels to the spectrum manager upon request.