Signal Processing System Short Message Filtering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing short message filtering mechanisms in mobile communication systems cannot effectively filter short messages sent from foreign subscribers to local subscribers or foreign subscribers roaming in the local network, as these messages are not forwarded to the local Short Message Service Center (SMSC) for filtering.
Innovation Solution
All messages from foreign networks to the local network are routed to a Signal Processing System (SPS) in the local network, where they are analyzed. If the message is a Mobile Terminated (MT) short message, it is forwarded to the local SMSC for filtering; if not, it is routed to the corresponding Mobile Switching Center (MSC) for normal processing, thereby enabling filtering of MT short messages sent from foreign subscribers to local subscribers or roaming subscribers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the short message filtering mechanism is implemented only on the local SMSC, then local MO short messages can be filtered effectively, but MT short messages from foreign subscribers to local network cannot be filtered
Solution Approach 1:
The filtering function is segmented between two network elements: the SPS intercepts and identifies MT short messages from foreign subscribers, while the local SMSC performs the actual filtering. This segmentation allows each component to specialize in its function, enabling comprehensive filtering coverage without overloading a single system.
Solution Approach 2:
The SPS acts as an intermediary component between foreign networks and the local SMSC. It receives all short messages from foreign networks, identifies MT short messages, and forwards them to the local SMSC for filtering, while allowing other message types to pass through to the MSC. This intermediary role enables the filtering mechanism to extend its coverage to foreign-originated messages without disrupting normal message routing.
2Reliability
If all short messages from foreign networks are routed to the local SMSC, then MT short messages can be filtered, but normal message routing efficiency deteriorates
Solution Approach 1:
The SPS performs preliminary identification and classification of incoming short messages from foreign networks before they reach the local SMSC. By pre-identifying MT short messages and separating them from other message types, the system avoids routing all messages through the filtering path, thus maintaining routing efficiency while enabling filtering where needed.
Solution Approach 2:
The message routing path is segmented into two streams: MT short messages are routed through the SPS to the local SMSC for filtering, while other message types are routed directly to the MSC without involving the SMSC. This segmentation ensures that only messages requiring filtering undergo the additional routing step, preserving overall system efficiency.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention provides a short message filtering method, including: routing a message sent from a foreign network to a local network to a signal process system (SPS) in the local network; forwarding, by the signal process system in the local network, the MT short message in the received message to a short message service center (SMSC) in the local network; filtering, by the SMSC in the local network, the received MT short message; sending, by the SMSC in the local network, the MT short message to the corresponding mobile switching center (MSC), if the MT short message is legal; sending, by the MSC, the received MT short message to the short message receiver. The present invention can attain the object of filtering a short message sent from a foreign subscriber to the local subscriber or to a foreign subscriber roaming in the local.