Push Notifications

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What is a Push Notification

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• Push notification is the delivery of

information from a software application to a

computing device, without a specific request

from the client (device).

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• Unlike pull notifications, in which the client

must request information from a server, push

notifications originate from a server itself.

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As entrepreneur Ariel Seidman writes,

“For the first time in human history, you can tap

almost two billion people on the shoulder…

Seamlessly…!!”

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How is notification sent??

• Step 1 : Notification is generated by the

server on which the app is running.

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How is notification sent??

• Step 2 : App Server notifies ‘notification

service provider’ of the specific OS.

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• Step 3 : Notification service provider of the

specific OS delivers the notification received

from the server to the device.

How is notification sent??

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How does it work??

Push Notification from 1 provider to 1 device

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How does it work??

Push Notification from multiple provider to multiple devices

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Architecture Overview

APNs – Apple Push Notification service

• Apple Push Notification service is the

centerpiece of the push notifications feature

for propagating information to iOS and OS X

devices.

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Architecture Overview

• APNs performs a store-and-forward function.

• If APNs attempts to deliver a notification but the

device is offline, the notification is stored for a

limited period of time, and delivered to the device

when it becomes available.

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Architecture Overview

• Only one recent notification for an application is stored.

If multiple notifications are sent while the device is

offline, each new notification causes the prior

notification to be discarded.

• If the device remains offline for a long time, any

notifications that were being stored for it are discarded.

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Architecture Overview

Device-to-Service Connection Trust

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Architecture Overview

Provider-to-Service Connection Trust

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Architecture Overview

Token Generation and Dispersal

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Architecture Overview

Sharing Device Token Overview

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Architecture Overview

Token Notification

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GCM

Google Cloud Messaging for Android (GCM) is a free

service that helps developers send data from

servers to their Android applications on Android

devices.

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Quick Question..!!

Does the app for which the notification is

being sent needs to be ON or run ACTIVELY?