Mobile Communication

friendlybathΚινητά – Ασύρματες Τεχνολογίες

12 Νοε 2013 (πριν από 4 χρόνια)

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Mobile Communication

Mobile Communication


An example of two TPDU segments, the UDH will contain the above FIG.

Note that the UDHL of the data is relative to the application port, application layer,
followed by the IEI representing values of a concatenated message.

Importantly the IED hold values that contain the identifier element along with
sequence number with respect to each segment

Mobile Communication


Special SMS message indication <OOx1>

This information element is used for updating waiting message indicators in the
receiving handsets.

They indicate where or not the messages are awaiting retrieval from the
server…………………………

Mobile Communication


In addition to the “information element method”,
three

other methods exist for
updating message waiting indicators.



TP
-
Data
-
Coding
-
Scheme: A msg waiting indicator can also be updated with the
delivery of a message for which a special value has been assigned to the TP
-
DCS. In this method a message waiting indicator can be activated / deactivated
on the handset.

Mobile Communication


In addition to the “information element method”,
three

other methods exist for
updating message waiting indicators.



TP originating
-
address method: Another method commonly supported by
SME’s. This message consists of assigning a special value to the TP
-
Orginating
-
Address of the msg to be delivered. NOTE: This is a defined method by Orange
and T
-
Mobile UK, yet to be recognized by standardization development
organization.

Mobile Communication


In addition to the “information element method”,
three

other methods exist for
updating message waiting indicators.



Return Call Message: In this method a message contains a text description
indicating that one or two messages are waiting retrieval. This is provided in TP
-
Protocol
-
Identifier.

Mobile Communication


Application Port Addressing:

This is a feature allowing the routing of a received message to the port of an
identified application running in the MS.

Application port addressing can be realized use two distinct IE,

The FIRST is used for 8
-
bit addressing ports and the second for 16
-
bit
addressing port.

The Above is diagrams are examples of 8 bit addressing.