HUAWEI ME909u-521 LTE LGA Module
Application Guide
SMS Application Scenarios
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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 5-1 shows an example of data encoded in PDU format of submitted type.
