Forwarding Labels for Seamless ICN Device Mobility
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Solution Overview
Problem
In information-centric networks (ICNs), mobile devices face challenges in seamless content delivery when moving between points of attachment (PoAs) due to the need for re-expressing interests and redirecting content objects, which can lead to delays and inefficiencies in content object delivery.
Innovation Solution
The implementation of Forwarding Labels (FLs) associated with content objects, which allows for the mapping of consumer IDs to local faces and the determination of active or inactive states, enabling the forwarding of content objects to new PoAs when a device moves, thereby improving content delivery speed and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mobile devices connect and disconnect from various PoAs in the network, then device mobility is enabled, but content delivery efficiency deteriorates due to the need to re-express interests at new PoAs
Solution Approach 1:
The system performs preliminary actions by maintaining PIT (Pending Interest Table) entries at PoAs even after devices disconnect. When a device moves to a new PoA, the network can proactively forward content objects using the stored PIT information, eliminating the need for devices to re-express interests and enabling seamless content delivery during mobility transitions.
2Reliability
If interests are re-expressed at new PoAs when devices move, then content can be delivered to mobile devices, but delivery time increases due to the re-expression process
Solution Approach 1:
The system maintains PIT entries in advance at PoAs, storing device identifiers and interest information before devices actually move. When a device reconnects at a new PoA, content objects can be immediately forwarded using the pre-stored PIT data, eliminating the time delay associated with re-expressing interests and ensuring continuous content delivery.
3Productivity
If content objects are cached at PoAs, then network content serving is improved, but complexity increases in managing content objects across multiple PoAs
Solution Approach 1:
The PIT table serves as an intermediary mechanism between PoAs and mobile devices. It stores essential forwarding information (device identifiers, interest data) that enables automated content object routing without requiring complex management protocols. This intermediary simplifies the caching management across multiple PoAs by providing a standardized way to track and forward content based on stored interest information.
Data Source
AI summary
Technology providing seamless mobility to mobile processing devices in an Information Centric Network (ICN) is provided. A first point of attachment (PoA) is configured to communicate with a first processing device identified by a device ID and receive content objects addressed to the first processing device. The first PoA is further configured to determine that the first processing device is no longer communicating with the first PoA and moving to a second PoA, and generate a forwarding label identifying the second PoA and the device ID. The first PoA is further configured to append the forwarding label to any content object addressed to the first processing device and not forwarded by the first PoA to the first processing device before it moves, and forward each such content object to the second PoA.