NDN Mobility via Decoupled Identity and Forwarding Labels
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Solution Overview
Problem
Current Named Data Networks (NDN) lack a solution for handling mobility, including inter/intra-domain mobility, which is essential for scalability, routing stability, and seamless mobility of consumers and producers, with existing technologies failing to provide effective content routing and forwarding mechanisms.
Innovation Solution
The solution involves complete de-coupling of identity and addressing space through a changeable forwarding label field in the NDN header with nodal/domain/global scope, enabling rich policy-based routing and mobility as a service by actively registering mobile name spaces with the network and setting a mobility flag in interest messages, allowing for flexible content routing and intra-session mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional host-based routing is used in NDN, then routing simplicity is maintained, but mobility handling capability is lost
Solution Approach 1:
The patent segments the NDN header into distinct functional components: a immutable name field for content identification and a mutable forwarding label field for routing and mobility management. This segmentation allows the routing infrastructure to operate on the forwarding label while the name remains stable, enabling mobility handling without compromising routing simplicity or content identification integrity.
2Adaptability or versatility
If identity and addressing space are coupled, then routing stability is maintained, but mobility flexibility is reduced
Solution Approach 1:
The patent extracts the mobility-related addressing function from the immutable name field and places it in the separate, mutable forwarding label field. This extraction allows the name to maintain its stability for content identification while the forwarding label can be dynamically changed to support mobility, effectively decoupling identity from addressing space.
3Adaptability or versatility
If forwarding paths are dynamically updated for mobility, then seamless mobility is achieved, but routing overhead increases
Solution Approach 1:
The patent introduces dynamics selectively into the forwarding label field, which can be updated to reflect mobility state changes, while keeping the name field static. This controlled dynamics allows seamless mobility through forwarding path updates without requiring complete routing recalculations, thereby reducing overall routing overhead compared to fully dynamic routing schemes.
Data Source
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AI summary
Various disclosed embodiments include methods, systems, and computer-readable media for named data network (NDN) inter/intra-domain mobility. A complete de-coupling of identity and addressing space is established. This provides separation of control and forwarding allowing rich policy based routing, using SDN principles, as well as policy based global resolution. In one embodiment, the de-coupling of identity from location is achieved by a changeable forwarding label field in a header that can have nodal/domain/global scope. This disclosure provides content routing/mobility to be handled with a high degree of flexibility. This disclosure also provides mobility as a service for a component of a name space.