System and method for subscribing for internet protocol multimedia subsystems (ims) services registration status

A computer-implemented method in a mobile device to receive service notifications from registered application services that are accessed via an Internet Protocol Multimedia Subsystem (IMS), the method comprising:

• at the mobile device, requesting, via an IP multimedia subsystem (IMS), registration of at least one application on the mobile device with multiple associated application services;
• receiving, on the mobile device, multiple notifications from the multiple application services,
• wherein each of the notifications indicate, on a per-application-service basis, the status of the corresponding application service,
• wherein at least one of the notifications indicates a failure of the corresponding application service and an indication of a reason for the failure of the corresponding application service, and
• wherein each notification is received by the corresponding application on the mobile device for which the notification is intended;
• and
• registering the application with one or more different application services in response to determining that the received notification indicates that the registration is terminated, or
• halting operation of the application on the mobile device in response to determining that the received notification indicates that the registration is terminated.

A computer-implemented method of providing application service status notifications to mobile devices for services that are accessed via an Internet Protocol Multimedia Subsystem (IMS), the method comprising:

• receiving, from a plurality of mobile devices, requests to receive notifications of status changes of application services accessed by the plurality of mobile devices via an IP Multimedia Subsystem (IMS);
• receiving at least one notification from application services, each notification providing a status of a corresponding application service;
• identifying mobile devices that are associated with the application service in each received notification;
• and
• for each received notification:
• providing the received notification to the identified mobile devices that are associated with the application service,
• wherein the notification indicate, on a per-application-service basis, the status of the application service and an indication of a reason for the status of the application service;
• and
• in response to determining that the received notification indicates that the registration is terminated,
• registering the application on the mobile device, or
• halting operation of the application on the mobile device.

A non-transitory computer-readable medium storing instructions that, when executed by a processor of a mobile device, cause the mobile device to execute a method to receive changes in registration status from application services that are accessed via an Internet Protocol Multimedia Subsystem (IMS), the method comprising:

• receiving, on the mobile device, a request to register at least one application on the mobile device with at least one application service accessed via an IP multimedia subsystem (IMS);
• transmitting, via the IMS, the registration request to at least one associated application service;
• receiving, by the at least one associated application on the mobile device, one or more notifications regarding the requested registration, the one or more notifications indicating, on a per-application-service basis, the registration status of each application service and an indication of a reason for the registration status of the corresponding application service;
• and
• registering the application on the mobile device with one or more different application services in response to determining that the received notification indicates a terminated registration, or
• halting operation of the application on the mobile device in response to determining that the received notification indicates a terminated registration.