WAP Push Messages

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Multimedia Messaging Service

WAP Push is a special type of SMS message that is pushed to the recipient. The data sent is one of two types :

      service indication tells the phone that there is something to download and the contents are held within the URL much like a link on a web site
      service load gives only the URL of a reosurce which on receipt the phone will be automatically downloaded to the phone automatically.

<?xml version="1.0" ?>
<!DOCTYPE si PUBLIC"../WAPFORUM/DTD SI 1.0/EN"
       "http://www.wapforum.org/DTD/si.dtd" >
	<si>
		<indication href="https://www.example.com" si-id="3592">
			Link to example
		</indication>
	</si>
<?xml version="1.0" ?>
<!DOCTYPE si PUBLIC"../WAPFORUM/DTD SI 1.0/EN"
       "http://www.wapforum.org/DTD/si.dtd" >
	<sl>
		href = https://www.example.com 
	</sl>

These XML messages, even being small in content, are larger than 160 characters. However there is a limited vocabulary in WAP Push a coding (WBXML) is used to reduce the size of the message to be sent over SMS.

This technology can be used to deliver any URL be that an image, video, audio, game etc. The data found in the URL is then downloaded to the device over the data network. One use in in the delivery of MMS Messages.