SMS Delivery in Wireless Systems via Network Domain Selection
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Solution Overview
Problem
Mobile communication systems face inefficiencies in delivering Short Message Service (SMS) messages as they require switching between different network domains (PS and CS) based on operator network configurations and terminal capabilities, leading to unnecessary domain changes and service disruptions.
Innovation Solution
A method and apparatus that allow a Mobile Station (MS) to determine the network domain to attach to based on SMS supportability by transmitting specific parameters in Attach/Routing Area Update (RAU) messages, enabling efficient SMS delivery by selecting the appropriate domain (PS or CS) based on operator network capabilities and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network domain (PS or CS) is changed depending on operator network configuration and terminal capabilities, then SMS service can be provided, but unnecessary domain changes occur leading to service disruptions and inefficiency
Solution Approach 1:
The terminal performs preliminary detection of SMS support capability in the core network node before initiating attachment. The terminal includes an indication of its SMS-only capability in the Attach Request message, allowing the network to pre-determine the appropriate domain and avoid unnecessary domain changes, thereby ensuring service continuity.
Solution Approach 2:
The core network node provides feedback information about SMS support capability to the terminal through the Attach Accept message. This feedback mechanism allows the terminal to understand whether SMS services are available in the current network domain, enabling intelligent domain selection and avoiding unnecessary domain changes that would disrupt service.
2Adaptability or versatility
If the terminal attaches to the CS domain when SMS is not supported in PS domain, then SMS service can be accessed, but domain switching complexity increases and service efficiency decreases
Solution Approach 1:
The terminal autonomously determines the appropriate network domain for attachment by detecting SMS support capability information from the core network node. The terminal self-adjusts its attachment behavior based on this information, eliminating the need for complex domain selection logic and manual intervention, thereby reducing device complexity while maintaining service accessibility.
3Adaptability or versatility
If SMS delivery capability is enabled in SGSN, then PS domain SMS service is available, but network configuration complexity increases
Solution Approach 1:
The core network node configures SMS delivery capability through parameter settings in the SGSN. By changing the operational state of SMS delivery parameters, the network can enable or disable PS domain SMS services without modifying the fundamental network architecture. This parameter-based configuration approach maintains network simplicity while providing flexible SMS delivery capability.
Data Source
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AI summary
A Short Message Service (SMS) delivery method and apparatus is provided for delivering an SMS message efficiently by selecting a network domain to attach to according to the service provided to a Mobile Station (MS) by the mobile operator network. An SMS delivery method of the present invention includes receiving, at a network node, an Attach/Routing Area Update (RAU) Request message including a parameter indicating an attach/update type and SMS-only service, and transmitting, when SMS in a Serving General Packet Radio Service (GPRS) Support Node (SGSN) is supported at the core network node, to the mobile station an Attach Accept message including a parameter indicating that SMS in SGSN is supported. The SMS delivery method of the present invention is capable of delivering SMS message efficiently in the wireless communication system.