SMS encompasses a number of basic features. This includes message submission, message delivery, handling of status reports, requests for command execution, reply path, etc. These features are presented in the following sections.
Message Submission and Delivery
Message Sending: Mobile-originated messages are messages which are submitted from an MS to an SMSC. These messages are addressed to other SMEs such as other mobile users or Internet hosts. This feature is also known as the Short Message-Mobile Originated (SM-MO).
Message Delivery: Mobile-terminated messages are messages delivered by the SMSC to the MS. Nearly all GSM handsets support message reception. This feature is also known as Short Message Mobile Terminated (SM-MT). In GSM, messages are sent over SDCCH or SACCH channels whereas, in GPRS, short messages are sent over PDTCH channels.
Status Reports
It is possible for an originator SME to request that a status report be generated upon delivery of the short message to the recipient SME. The status report indicates to the originator whether or not the short message has been successfully delivered to the recipient SME.
Reply Path
This feature is sometimes used by operators to allow the message recipient to provide a reply message ‘‘free of charge’’ for the message recipient. Additionally, for networks supporting several SMSCs, operators sometimes use this feature to get reply messages to be returned to a particular SMSC. For example, an operator could have several SMSCs but only one connected to the Email gateway. In this configuration, if a message is originated from the Internet domain, then the operator uses the reply path to indicate that any message reply associated with this Email-originated message should be submitted to the SMSC connected to the Email gateway.
Addressing Modes
With SMS, several modes are possible for addressing message recipients. The most common addressing mode consists of using the Mobile Station ISDN Number (MSISDN) in the [ITU-E.164] format (e.g., ?33612345678). An optional addressing feature of SMS consists of conveying sub-addressing information as part of a message. For instance, a mobile handset may request a weather forecast update by sending a message to an application server. The identification of the requested service (e.g., service 64) can be specified as part of the sub-addressing information.
Validity Period
A message originator has the possibility of indicating a validity period for a message. This validity period defines the deadline after which the message content is to be discarded. If a message has not been delivered to the message recipient before the expiry date, then the network usually discards the message without further attempts to deliver it to the recipient.
Message Submission and Delivery
Message Sending: Mobile-originated messages are messages which are submitted from an MS to an SMSC. These messages are addressed to other SMEs such as other mobile users or Internet hosts. This feature is also known as the Short Message-Mobile Originated (SM-MO).
Message Delivery: Mobile-terminated messages are messages delivered by the SMSC to the MS. Nearly all GSM handsets support message reception. This feature is also known as Short Message Mobile Terminated (SM-MT). In GSM, messages are sent over SDCCH or SACCH channels whereas, in GPRS, short messages are sent over PDTCH channels.
Status Reports
It is possible for an originator SME to request that a status report be generated upon delivery of the short message to the recipient SME. The status report indicates to the originator whether or not the short message has been successfully delivered to the recipient SME.
Reply Path
This feature is sometimes used by operators to allow the message recipient to provide a reply message ‘‘free of charge’’ for the message recipient. Additionally, for networks supporting several SMSCs, operators sometimes use this feature to get reply messages to be returned to a particular SMSC. For example, an operator could have several SMSCs but only one connected to the Email gateway. In this configuration, if a message is originated from the Internet domain, then the operator uses the reply path to indicate that any message reply associated with this Email-originated message should be submitted to the SMSC connected to the Email gateway.
Addressing Modes
With SMS, several modes are possible for addressing message recipients. The most common addressing mode consists of using the Mobile Station ISDN Number (MSISDN) in the [ITU-E.164] format (e.g., ?33612345678). An optional addressing feature of SMS consists of conveying sub-addressing information as part of a message. For instance, a mobile handset may request a weather forecast update by sending a message to an application server. The identification of the requested service (e.g., service 64) can be specified as part of the sub-addressing information.
Validity Period
A message originator has the possibility of indicating a validity period for a message. This validity period defines the deadline after which the message content is to be discarded. If a message has not been delivered to the message recipient before the expiry date, then the network usually discards the message without further attempts to deliver it to the recipient.
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