Huawei ME909u-521 manual SMS Application Scenarios, Overview

HUAWEI ME909u-521 LTE LGA Module
Application Guide	SMS Application Scenarios

5 SMS Application Scenarios

5.1 Overview

Short Message Service (SMS) is a text messaging service using a service center(SC) to transfer short text messages between GSM MEs and Short Message Entities (SMEs). ME909u-521 only supports protocol data unit (PDU) mode message.

A message must contain the following information before it is sent:

For a PDU mode message:

Length of TPDU package

Message content: To compose or send a PDU mode message, the message must contain all the message attributes and be encoded in PDU format. A PDU consists of the following:

−Service Center Address (SCA): composed of the address length, SCA type and SCA reverse byte.

−First octet: contains the message type indicator, TP-RP, TP-UDHI, TP-SRR, TP-VPF, TP-RD, and TP-MTI.

−Short text message statement.

−Destination address: consisting of the destination address, address length and destination address type.

−Protocol identifier.

−Data encoding scheme.

−Validity duration.

−Data length.

−User data: consisting of the user data header and the data encoded in PDU format.

Figure‎ 5-1shows an example of data encoded in PDU format of submitted type.

Issue 01 (2013-07-05)	Huawei Proprietary and Confidential	24
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