WDP: Wireless Datagram Protocol
n Protocol of the transport layer within the WAP architecture
uses directly transports mechanisms of different network technologies
offers a common interface for higher layer protocols
allows for transparent communication using different transport
technologies (GSM [SMS, CSD, USSD, GPRS, ...], IS-136, TETRA,
DECT, PHS, IS-95, ...)
n Goals of WDP
create a worldwide interoperable transport system with the help of WDP
adapted to the different underlying technologies
transmission services such as SMS, GPRS in GSM might change, new
services can replace the old ones
n Additionally, WCMP (wireless Control Message Protocol) is used for
control/error report (similar to ICMP in the TCP/IP protocol suite)