Integrated HLR SMSC Bandwidth Conservation
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Solution Overview
Problem
Conventional short message systems waste bandwidth by continuously retrying to deliver messages to unavailable destination devices, as the home location register (HLR) is not updated with delivery failure information, leading to repeated attempts across the network.
Innovation Solution
A functionally integrated home location register and short message service center (HLR/SMSC) that receives undeliverable message notices, updates its database, and sends a cancellation request to the visitor location register to delete the destination device, thereby preventing further retries until the device becomes available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional SMS systems continuously retry message delivery to unavailable devices, then message delivery reliability is maintained, but network bandwidth is wasted
Solution Approach 1:
The patent implements feedback by having the SMSC send delivery status notifications to the HLR. When a message delivery fails, the SMSC notifies the HLR, which then updates its records to prevent future retries to unavailable devices. This feedback loop ensures that the system learns from delivery failures and adjusts its behavior accordingly, maintaining reliability while avoiding wasted bandwidth.
Solution Approach 2:
The patent applies preliminary action by having the HLR proactively update its database with delivery failure information before retry attempts occur. When the HLR receives notification of a delivery failure, it immediately marks the destination device as unavailable in its database, preventing subsequent retry attempts. This preliminary update action stops bandwidth waste before it can occur through repeated failed deliveries.
2Device complexity
If the HLR is not updated with delivery failure information, then system simplicity is maintained, but unnecessary retries occur consuming bandwidth
Solution Approach 1:
The patent introduces a feedback mechanism where the SMSC communicates delivery status to the HLR. This feedback loop adds minimal complexity to the system but effectively prevents unnecessary retries by ensuring the HLR has accurate delivery status information, thereby conserving network bandwidth.
Solution Approach 2:
The patent merges the functionality of the SMSC and HLR by establishing a direct communication channel between them for sharing delivery status information. This integration allows the HLR to maintain updated delivery status records without requiring a completely separate system, thus adding minimal complexity while effectively preventing bandwidth waste through unnecessary retries.
3Loss of energy
If the HLR updates its database with delivery failure information, then bandwidth is conserved, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the SMSC sends delivery status notifications to the HLR. This feedback loop enables the HLR to update its database with delivery failure information, conserving bandwidth by preventing unnecessary retries. The added complexity is minimal, involving only the establishment of a communication channel and database update procedure.
Solution Approach 2:
The patent enables the HLR to self-update its database with delivery failure information received from the SMSC. This self-service capability allows the system to automatically prevent unnecessary retries without requiring external intervention or complex centralized control, thus conserving bandwidth while adding minimal system complexity.
Data Source
AI summary
An intelligent short message system can provide an integrated home location register and short message service center (HLR/SMSC). Upon receiving an indication from a mobile switching center (MSC) that an SMS message could not be delivered to a destination device, the integrated HLR/SMSC prevents further retries from being attempted until the destination device becomes available again.