Systems and methods for creating time aware networks using independent absolute time values in network devices

• US 20050182856A1
• Filed: 12/22/2003
• Published: 08/18/2005
• Est. Priority Date: 12/22/2003
• Status: Abandoned Application

• Current Assignee: Charles Lee Mcknett
• Original Assignee: Charles Lee Mcknett
• Inventors: McKnett, Charles Lee
• Application Number:
  US10/745,187
• Publication Number:
  US 20050182856A1
• Time in Patent Office: Days
• US Class Current: 709/248
• CPC Class Codes: G06F 1/14 Time supervision arrangements, e.g. real time clock
• CPC Class Codes: G06F 9/52 Program synchronisation; Mutual exclusion, e.g. by means of semaphores
• CPC Class Codes: H04J 3/0644 External master-clock
• CPC Class Codes: H04J 3/0679 by determining clock distribution path in a network

Abstract

A time aware network having an inherent time reference that enables the sharing of network resources in a network environment wherein the transfer of synchronized time information is not required is provided. The internal time reference is established using absolute time values which are time coordinates extracted from a GPS signal. The absolute time values and a defined clock parameter block, coordinate how the time-aware devices use the internal time reference and are further used to establish a network domain. Devices capable of meeting the network clock domain timing requirements may participate in the domain. Upon joining a network clock domain, a client may access a shared resource through a locking authority which maintains the data coherency of the shared resource. The client, locking authority and shared resource are all time aware devices participating in the same network clock domain communicating using the internal time reference.

Claims

1. A time aware network, comprising:

a plurality of time aware devices, each of the plurality of time aware devices having an absolute time value, wherein an inherent time reference is created when the absolute time value associated with each time aware device satisfies defined timing parameters thereby eliminating the need to synchronize time information among the plurality of time aware devices.

2. The time aware network of claim 1, wherein the inherent time reference is utilized in any communication system that requires strict sequencing of transmitted and received messages.

3. The time aware network of claim 1, wherein the plurality of time aware devices are configured to communicate in synchronous fashion using the inherent time reference.

4. The time aware network of claim 1, wherein the absolute time value for each of the plurality of time aware devices is a time coordinate extracted from a GPS signal.

5. The time aware network of claim 1, wherein the time aware device is a client device.

6. The time aware network of claim 5, wherein the client device is any one of a workstation, a server, a CPU, or a wireless device.

7. The time aware network of claim 1, wherein the time aware device is a locking authority.

8. The time aware network of claim 1, wherein the time aware device is a shared network resource.

9. The time aware network of claim 1, wherein the time aware device is a router.

10. The time aware network of claim 1, wherein the defined timing parameter is a clock parameter block, said clock parameter block configured to set forth the requirements that each of the plurality of time aware devices must be capable of satisfying in order to communicate with other time aware devices using the inherent time reference.

11. The time aware network of claim 7, wherein the locking authority creates a network clock domain.

12. The time aware network of claim 11, wherein said network clock domain is established using the clock parameter block.

13. The time aware network of claim 11, wherein the clock parameter block is based on the timing requirements of the shared resource.

14. The time aware network of claim 11, wherein the client joins a network clock domain to access the shared resource.

15. The time aware network of claim 14, wherein the locking authority controls the client'"'"'s access to the shared resource.

16. The time aware network of claim 15, wherein the locking authority provides data coherency by controlling access to the shared resource.

17. The time aware network of claim 15, wherein the locking authority uses a plurality of locking scenarios to control access to the shared resource.

18. The time aware network of claim 16, wherein the locking authority is configured to reorder received messages based on a transmission time stamp.

19. The time aware network of claim 17, wherein the locking authority is further configured to grant a lock to a first client and re-queue a request received from a second client.

20. The time aware network of claim 8, wherein the shared resource is a network resource.

21. The time aware network of claim 8, wherein the shared resource is a mass storage mechanism.

22. The time aware network of claim 21, wherein the mass storage mechanism is a database.

23. The time aware network of claim 21, wherein the mass storage mechanism is a disk array.

24. The time aware network of claim 20, wherein the shared resource is a mass memory system.

25. The time aware network of claim 20, wherein the shared resource is a streaming media system.

26. The time aware network of claim 1, wherein the inherent time reference is a pseudo-clock generated by the locking authority using the clock parameter block and the absolute time values

27. The time aware network of claim 11, wherein in order to communicate using the inherent time reference, the time aware devices and the shared resource belong to the same network clock domain.

28. The time aware network of claim 11, wherein clients must join the network clock domain in order to access the shared resource in the network clock domain.

29. The time aware network of claim 2, wherein the resequencing of the received messages is based on a time stamp indicating the time the message was transmitted.

30. An inherent network time reference, comprising:

an absolute time value, said absolute time value being a time coordinate extracted from a GPS signal;

a parameter block, said parameter block defining the timing requirements,

wherein when the absolute time value satisfies the timing requirements defined by the parameter block the inherent network time reference is established enabling devices with the absolute time value to communicate without synchronizing time information.

31. The inherent network time reference of claim 30, wherein the inherent time reference is utilized in any communication system that requires strict sequencing of transmitted and received messages.

32. The inherent network time reference of claim 30, wherein the device is a time aware device.

33. The inherent network time reference of claim 30, wherein the inherent network time reference acts as a pseudo-clock for a time aware device.

34. The inherent network time reference of claim 32, wherein the time aware device includes a GPS receiver for extracting the timing coordinate.

35. The inherent network time reference of claim 32, wherein the timing requirements are set forth by a shared resource.