SDN Mobility Anchors for Distributed Packet Routing
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Solution Overview
Problem
Current IP mobility management protocols are inadequate for providing 'always-on' and ubiquitous services due to centralized architectures, leading to sub-optimal routing, scalability, reliability, and signaling overhead issues, and lack of fine-grained mobility management.
Innovation Solution
Implementing a software-defined networking (SDN) approach with distributed mobility management (DMM) that separates control and data planes, using an SDN controller to dynamically select and manage mobility anchors at the network edge, enabling flexible and efficient network configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized IP mobility management protocols are used, then mobility management is provided, but routing becomes sub-optimal and scalability deteriorates
Solution Approach 1:
The patent segments the centralized mobility management function into distributed mobility anchor points (MAPs) located at network edges. Each MAP independently manages mobility for its local area, eliminating the single centralized bottleneck and enabling optimal local routing decisions while maintaining mobility management reliability.
Solution Approach 2:
The patent introduces a new dimensional structure by placing mobility anchor points at network edges rather than maintaining a single centralized point. This spatial redistribution creates a multi-dimensional architecture where mobility management occurs across multiple locations simultaneously, improving both routing efficiency and scalability.
2Device complexity
If centralized mobility management is implemented, then mobility control is simplified, but signaling overhead increases
Solution Approach 1:
The patent divides the centralized control function into multiple distributed control plane entities at different network locations. This segmentation allows signaling to be localized to relevant areas rather than traversing the entire network to a central point, reducing overall signaling overhead while maintaining manageable control architecture.
Solution Approach 2:
The patent introduces local mobility anchor points as intermediary entities that handle signaling locally before necessary information is escalated to higher-level controllers. These intermediaries filter and process signaling messages, reducing the total volume of signaling traffic that must traverse the entire network.
3Productivity
If distributed mobility anchors are deployed, then routing efficiency improves, but system complexity increases
Solution Approach 1:
The patent designs mobility anchor points with multi-functional capabilities that can operate in both distributed and centralized modes. These universal entities can function as local anchors for immediate routing efficiency while also participating in coordinated multi-anchor operations, achieving improved routing without proportionally increasing system complexity.
Solution Approach 2:
The patent implements feedback mechanisms where distributed mobility anchor points exchange information about network conditions, mobility patterns, and resource utilization. This feedback enables dynamic coordination between anchors, allowing the system to self-optimize routing decisions while maintaining manageable complexity through standardized interaction protocols.
Data Source
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AI summary
A network node comprising a processor operatively coupled to at least one interface; the processor and the at least one interface configured to manage a packet data session of a wireless transmit/receive unit (WTRU) with a data network; the processor configured to select a first anchor node for the packet data session of the WTRU by considering at least one of: position information of the WTRU or mobility requirements associated with the packet data session of the WTRU; and the processor and the at least one interface configured to control uplink and downlink traffic forwarding toward the selected first anchor node for the packet data session of the WTRU.