AOI CAST TOLERANCE BASED COMPASS
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AOI CAST TOLERANCE BASED COMPASS ROUTING IN DISTRIBUTED VIRTUAL ENVIRONMENTS Michele Albano, Luca Genovali, Antonio Quartulli, Laura Ricci NETGAMES '09 Paris, November 23-24th, 2009. Universit à degli Studi di Pisa Dipartimento di Informatica. A VORONOI BASED APPROACH FOR P2P DVE.

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Universit degli studi di pisa dipartimento di informatica

AOI CAST TOLERANCE BASED COMPASS ROUTING INDISTRIBUTED VIRTUAL ENVIRONMENTSMichele Albano, Luca Genovali, Antonio Quartulli,Laura RicciNETGAMES '09 Paris, November 23-24th, 2009

Università degli Studi di PisaDipartimento di Informatica


A voronoi based approach for p2p dve

A VORONOI BASED APPROACH FOR P2P DVE

Definition of a Voronoi Tessellation of the DVE

each peer is paired with a DVE region including the

points of the DVE closer to it w.r.t. any other peer

P2P Overlay: defined by the Delaunay Triangulation

corresponding to the Voronoi Tessellation

Our proposal: AOI-cast, a new strategy to propagate the heartbeats in the Area of Interest of a peer

based on reverse compass routing, a routing algorithm exploiting the properties of the Delaunay Triangulation

introduces a Tolerance threashold to guarantee the delivery of the heartbeats in presence of network delay


A voronoi based approach for p2p dve1

A VORONOI BASED APPROACH FOR P2P DVE

Compass Routing: A5 chooses A as next hop because

RootA5A<Root A5 A1andRoot A5 A <Root A5 A4

Each node reverses compass routing to detect its sons

in the AOI-cast tree: A5 is A next hop in the AOI-tree

Routing algorithm:

Neighbour Ordering: a node n orders its Voronoi neighbours according to a counter-clockwise ordering

Define a set S of conditions to detect neighbour regions intersecting the border of the DVE

Children Detection: for each neighbour p of n the angle evaluation phase is executed by considering pred(p) and/or succ(p), depending on the conditions in S


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