PDSN Handoff Management via Multiple IP Address Segmentation
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Solution Overview
Problem
Wireless communication systems with PDSNs having multiple IP addresses face limitations in throughput and redundancy due to the risk of internal hard handoffs, which disrupt data applications and require renegotiation of call parameters.
Innovation Solution
Implementing PDSNs with multiple IP addresses and corresponding physical interfaces, treating handoffs between these addresses as soft handoffs to maintain continuous network connectivity and avoid renegotiation of higher-layer call functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDSNs have multiple IP addresses to increase throughput and redundancy, then network capacity and reliability improve, but the risk of internal hard handoffs increases
Solution Approach 1:
The patent segments the PDSN's multiple IP addresses into distinct logical entities, each associated with specific physical interfaces. This segmentation allows the system to track which IP address is connected to which physical interface, enabling soft handoff detection and preventing internal hard handoffs while maintaining multiple concurrent connections for increased throughput.
Solution Approach 2:
The patent implements feedback mechanisms where the network monitors handoff events and compares them against the configured IP address to physical interface mappings. When a handoff occurs, the system checks whether the new IP address corresponds to a different physical interface than expected, and if so, treats it as a soft handoff rather than a hard handoff, thereby preventing disruption.
2Reliability
If PDSNs use multiple IP addresses for redundancy against failures, then system reliability improves, but complexity of managing handoffs increases
Solution Approach 1:
The patent performs preliminary configuration by establishing the mapping between IP addresses and physical interfaces before handoffs occur. This pre-configuration allows the network to automatically determine the correct behavior during handoff events without complex real-time decision-making, reducing operational complexity while maintaining redundancy capabilities.
Solution Approach 2:
The patent changes the parameter of handoff treatment from unconditional hard handoff to conditional soft handoff based on IP address to physical interface mapping. By introducing this new parameter (the mapping relationship), the system can simplify handoff management logic while enabling redundancy through multiple IP addresses.
3Stability of the object's composition
If handoffs between IP addresses are treated as soft handoffs, then data application continuity improves, but requirement for IP address tracking increases
Solution Approach 1:
The patent enables the network to self-manage IP address tracking by having the PDSN itself maintain the mapping between IP addresses and physical interfaces. This self-service approach eliminates the need for complex external tracking systems while ensuring data application continuity through proper soft handoff treatment.
Data Source
AI summary
Methods and systems are provided for using a PDSN in a wireless communication network that includes multiple IP addresses and multiple corresponding physical interfaces. Through the use of multiple IP addresses and interfaces, the throughput of the PDSN may be substantially increased. Additionally, the multiple IP addresses and interfaces may be used to provide redundancy in order to protect against software or hardware failures. According to the methods and systems of the invention, moreover, the risk of internal hard handoffs resulting from the use of a PDSN having multiple IP addresses and interfaces is eliminated or at least substantially reduced.