2P-Lookup: Popularity and Proximity based P2P Lookup mechanism over MANETs

Query Learning-Based Scheme for Pertinent Resource Lookup in Mobile P2P Networks

“…Although the deployment of unstructured P2P applications over MANETs is a promising idea, the resource lookup mechanism in this kind of applications still remains a challenging issue. To this end, three approaches have been proposed: 1) Layered design: it applies existing search mechanisms proposed for unstructured P2P applications over fixed networks (e.g, Internet) on a top of MANET underlay [6], [7]. However, these latter achieve poor performances over MANET underlay, since every overlay hop required by the resource lookup protocol at the application layer could result in a costly flooding-based route discovery in the MANET underlay network leading to unnecessary network traffic, network congestion as well as delay issues.…”

“…2) Cross-layered design: it encourages communication between the P2P overlay and the MANET underlay. Indeed, in this design, the P2P overlay is optimized with respect to MANET constraints and it closely matches the MANET underlay [6], [7]. Furthermore, to avoid issues related to flooding-based route discovery in the MANET underlay network, the resource lookup mechanism, at the application layer, communicates to the underlay protocol a stable path between the source and destination peers.…”

“…Furthermore, to avoid issues related to flooding-based route discovery in the MANET underlay network, the resource lookup mechanism, at the application layer, communicates to the underlay protocol a stable path between the source and destination peers. 3) Integrated design: it combines the resource lookup mechanism with the MANET network routing protocol at the network layer [6], [7].…”

“…In [6] it was pointed out that the cross-layer design is the most suitable one because it establishes communication between the overlay and the MANET underlay without changing the conventional system architecture. In the following section, we present some existing cross-layer resource lookup mechanisms over MANETs.…”

“…Each peer maintains connection with other closer peers such that it can reach the root-peer. Seddiki and Benchaïba [6] proposed a P2P lookup mechanism over MANETs called 2P-Lookup. To reduce the mismatch between the P2P overlay and the MANET underly topologies, 2P-Lookup built the P2P overlay based on the physical proximity of peers.…”