Service layer time synchronization
Methods and systems may be used to synchronize time across multiple IoT related entities, such as a network of resource constrained sensor and actuator type devices, IoT gateways, IoT cloud services, or IoT applications.
1. An apparatus for time synchronization, the apparatus comprising:
a processor; and
a memory coupled with the processor, the memory comprising executable instructions that when executed by the processor cause the processor to effectuate operations comprising:
receiving a service layer request from a service layer endpoint, the service layer request comprising data of an application and a time based parameter corresponding with the data of the application;
based on the service layer request, determining a synchronization offset; and
adjusting time based parameters for the data of the application based on the determined synchronization offset.
2. The apparatus of claim 1 , wherein the determining the synchronization offset comprises comparing a current local time of the service layer endpoint and current local time of a service layer of the apparatus, wherein the time based parameter comprises the current local time of the service layer endpoint.
3. The apparatus of claim 1 , wherein the parameters corresponding with time correction comprise an indication to enable service layer time correction.
4. The apparatus of claim 1 , wherein the parameters corresponding with time correction comprise an indication of precision for service layer time correction.
5. The apparatus of claim 1 , wherein the request is a request for registration with a service layer of the apparatus.
6. The apparatus of claim 1 , further operations comprising sending a response that includes an indication that the content of the service layer request were time-corrected or time-stamped.
7. The apparatus of claim 1 , further operations comprising sending a time-stamp applied to the data or the calculated offset between the time in the request and the applied timestamp.
8. The apparatus of claim 1 , wherein the apparatus comprises a mobile device.
9. The apparatus of claim 1 , further operations comprising based on the service layer request, sending a response comprising an offset for adjusting time for the application on the service layer endpoint.
10. The apparatus of claim 1 , further operations comprising based on the service layer request, sending a response comprising an offset for adjusting time for the service layer endpoint, wherein the service layer endpoint is a mobile device.
11. A method for time synchronization, the method comprising:
receiving, by an apparatus, a service layer request from a service layer endpoint, the service layer request comprising data of an application and a time based parameter corresponding with the data of the application;
based on the service layer request, determining a synchronization offset; and
adjusting time based parameters for the data of the application based on the determined synchronization offset.
12. The method of claim 11 , wherein the determining the synchronization offset comprises comparing a current local time of the service layer endpoint and current local time of a service layer of the apparatus, wherein the time based parameter comprises the current local time of the service layer endpoint.
13. The method of claim 11 , wherein the parameters corresponding with time correction comprise an indication to enable service layer time correction.
14. The method of claim 11 , wherein the parameters corresponding with time correction comprise an indication of precision for service layer time correction.
15. The method of claim 11 , wherein the request is a request for registration with a service layer of the apparatus.
16. The method of claim 11 , further operations comprising sending a response that includes an indication that the content of the service layer request were time-corrected or time-stamped.
17. The method of claim 11 , further operations comprising sending a time-stamp applied to the data or the calculated offset between the time in the request and the applied timestamp.
18. The method of claim 11 , further comprising based on the service layer request, sending a response comprising an offset for adjusting time for the application on the service layer endpoint.
19. The method of claim 11 , further comprising based on the service layer request, sending a response comprising an offset for adjusting time for the service layer endpoint, wherein the service layer endpoint is a mobile device.
20. A non-transitory computer readable storage medium storing computer executable instructions that when executed by a computing device cause said computing device to effectuate operations comprising:
receiving a service layer request from a service layer endpoint, the service layer request comprising data of an application and a time based parameter corresponding with the data of the application;
based on the service layer request, determining a synchronization offset; and
adjusting time based parameters for the data of the application based on the determined synchronization offset.