Short Message Processing for Terminals Without MSISDN
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Solution Overview
Problem
Conventional short message services cannot send messages to terminals without a Mobile Station International PSTN/ISDN Number (MSISDN), as they rely on MSISDN for identification, leading to communication failures with IMS UEs lacking this number.
Innovation Solution
A method and system that enable short message processing by using a session initiation protocol (SIP) URI and an indication of no MSISDN in the short message service-submit message, allowing the system to route messages through a series of entities like MSC, SGSN, SMS-IWMSC, SMS-SC, SMS-GMSC, and IP-SM-GW, generating a correlation identifier to facilitate communication with IMS UEs without MSISDN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the system uses MSISDN for terminal identification in short message service, then the identification process is simple and direct, but terminals without MSISDN (such as IMS UEs) cannot be identified or receive messages
Solution Approach 1:
The patent introduces an IP-SM-GW (IP Short Message Gateway) as an intermediary component between the traditional SMS network and IMS terminals. This gateway receives messages destined for terminals without MSISDN, performs SIP URI to terminal address translation, and forwards messages through appropriate protocols, thereby enabling compatibility with IMS terminals while maintaining the existing MSISDN-based identification system for traditional terminals
Solution Approach 2:
The message routing system is enhanced to support multiple identification methods universally. The system can now handle both MSISDN-based identification for traditional terminals and SIP URI-based identification for IMS terminals through a unified messaging platform. The IP-SM-GW and enhanced SMS-GMSC provide multi-functional capabilities to route messages regardless of the terminal type or identification method
2Adaptability or versatility
If the system requires MSISDN in the short message service-submit message, then the message routing is straightforward, but messages cannot be sent to IMS UEs that lack MSISDN
Solution Approach 1:
The patent modifies the message parameters by introducing a new indication field in the short message service-submit message that specifies whether the called terminal has an MSISDN. When the indication shows the terminal lacks MSISDN, the system uses alternative parameters such as SIP URI for identification. This parameter change enables flexible adaptation to different terminal types without losing identification information
Solution Approach 2:
The system performs preliminary identification and routing decisions at the SMS-GMSC and IP-SM-GW stages. Before message delivery, the system checks the indication field and called terminal information to determine the appropriate routing path. This preliminary action ensures that identification information is preserved and correctly interpreted before the message reaches the destination terminal
3Adaptability or versatility
If the system uses a single identification method (MSISDN), then the identification process is consistent and simple, but it cannot accommodate new terminal types like machine type communications devices
Solution Approach 1:
The patent segments the message routing function into distinct specialized entities: SMS-IWMSC for interworking, SMS-SC for service logic, SMS-GMSC for gateway control, and IP-SM-GW for IP-based routing. Each entity handles specific aspects of message routing for different terminal types. This segmentation allows the system to support diverse terminal types while maintaining clear functional boundaries and manageable complexity in each component
Data Source
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AI summary
Embodiments of the present invention disclose a short message processing method and a relevant system, which are used to solve a problem that an calling terminal cannot send a short message to a called terminal that does not have an MSISDN, thereby implementing short message communications between a terminal and a terminal that does not have an MSISDN. In one embodiment of the present invention, a short message service-submit message sent by an calling terminal to an MSC or SGSN carries an indication that a called terminal does not have an MSISDN, and the short message service-submit message carries an SIP URI of the called terminal, so that the calling terminal is capable of sending the indication and the SIP URI of the called terminal to an SMS-SC via the MSC or SGSN and an SMS-IWMSC, and the SMS-SC implements short message communications with the called terminal via an SMS-GMSC and an IP-SM-GW.