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 WAP
Push, available since WAP 1.2, has been incorporated into
the specification to allow WAP content to be pushed to the
mobile handset with minimum user intervention. A WAP Push
is basically a specially encoded message which includes
a link to a WAP address. WAP Push is specified on top of
WDP; as such, it can be delivered over any WDP-supported
bearer, such as GPRS or SMS.
In most GSM networks, however, GPRS activation from the
network is not generally supported so WAP Push messages
have to be delivered on top of the SMS bearer. On receiving
a WAP Push, a WAP 1.2 or later enabled handset will automatically
give the user the option to access the WAP content.
In this way, the WAP Push directs the end user to a WAP
address where particular content may be stored ready for
viewing or downloading to the handset. The address could
be a simple page or multimedia content (e.g. polyphonic
ring tone) or a Java application. Using WAP Push, one can
make it easier for end users to discover and access new
mobile services.
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