SIP Node SS7 Routing Information Triggering
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Solution Overview
Problem
Current SIP and SPIRITS protocols lack a mechanism for including SS7 routing information in response messages, leading to resource-intensive state information maintenance at SS7 nodes, particularly in international networks where duplicate point codes are used, hindering efficient communication between SS7 and IP networks.
Innovation Solution
A method and system that generate and forward SIP messages with SS7 routing information and a parameter to trigger SIP nodes to include this information in response messages, utilizing an SS7 network interface, message processor, and IP network interface to ensure accurate routing without requiring extensive state maintenance at SS7 nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SS7 nodes maintain state information for routing responses in SIP networks, then routing accuracy is improved, but resource utilization at SS7 nodes deteriorates
Solution Approach 1:
The patent extracts the routing information maintenance function from the SS7 node and relocates it to the SIP network. The SS7 node sends routing information (point codes, network group codes) to the SIP network, which then maintains the state information and uses it to route response messages back to the originating SS7 node. This extraction eliminates the resource burden from SS7 nodes while preserving routing accuracy.
2Reliability
If SS7 nodes maintain state information for routing responses, then routing capability is improved, but device complexity deteriorates
Solution Approach 1:
The complex state information maintenance functionality is extracted from the SS7 node and transferred to the SIP network infrastructure. The SS7 node simply provides routing information without needing to maintain state, while the SIP network assumes the complexity of tracking message states and managing routing information for efficient response delivery.
3Productivity
If SS7 routing information is included in SIP messages, then communication efficiency between SS7 and IP networks is improved, but protocol complexity deteriorates
Solution Approach 1:
The patent implements a universal mechanism where SIP messages carry both voice communication functionality and SS7 routing information transport functionality. The same SIP message infrastructure is used to convey both the communication payload and the routing metadata, eliminating the need for separate dedicated routing channels and reducing overall system complexity despite the enhanced functionality.
Data Source
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AI summary
Methods, systems, and computer program products are disclosed for triggering SIP nodes to include SS7 routing information in response messages including information requested by SS7 nodes. A message having SS7 routing information is received from a remote SS7 node. A corresponding SIP message is generated that includes the SS7 routing information and a parameter for triggering the SIP node to include the routing information in a response message. The corresponding SIP message is forwarded to a remote SIP node.