Abstract
The capability of proactive in‐network caching and sharing of content is one of the most important features of an information‐centric network (ICN). We describe an ICN model featuring autonomous agents controlling the content routers. Such agents are unlikely to share cached content with other agents without an incentive to do so. To stimulate cooperation between agents, we adopt a reputation and trust building scheme that is able to explicitly account for both objective current content availability and subjective willingness to cooperate. The scheme is further complemented with a so‐called one‐time goodwill mechanism introduced to avoid penalizing agents failures to provide temporarily unavailable content. In a simulated ICN environment under a modified Random Waypoint user mobility model, we investigate the resiliency of the reputation and trust building scheme to subversion, that is, strategic (selfish or malicious) agents acquiring higher trust values than honest ones, for varying user mobility scenarios. The scheme proves resilient in low‐mobility scenarios, while increased user mobility is shown to have a negative effect. The one‐time goodwill mechanism partly remedies this for high‐mobility scenarios. We validate the results by comparison with an existing reputation and trust building scheme and with an alternative user mobility model.
Highlights
Information-centric network (ICN) is a content deliveryoriented network architecture that aims to better suit the needs of contemporary network users, typically interested in obtaining specific information rather than establishing a connection with a specific network site hosting this information
We address the following question: How sharp is the distinction between hand s-agents relative to the parameters of Subscriber mobility? This question cannot be answered analytically due to the operational complexity of the described ICN architecture and reputation and trust building scheme, even though the model is somewhat simplified; we resort to simulations
The reputation and trust building scheme proposed for the considered ICN environment has been shown to be resilient to subversion for a mobility-less scenario; its resiliency to strategic agents weakens as Subscriber mobility increases
Summary
Information-centric network (ICN) is a content deliveryoriented network architecture that aims to better suit the needs of contemporary network users, typically interested in obtaining specific information rather than establishing a connection with a specific network site hosting this information. Content caching allows for content to be saved locally, close to the interested end users, reducing the need for resource intensive ondemand routing and transfer of large files or streams. While in a centrally controlled network such node behavior can be enforced, large-scale networks are likely to have parts of their functionality governed by fully or partially independent logical entities located at the nodes and controlling their behavior. These entities are able to make autonomous (in particular, selfish) decisions within the bounds of their assigned functionality and can be regarded as autonomous rational agents
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