Obstacle constrained group mobility model

Ad hoc networks are networks that can be deployed rapidly and requires no fixed infrastructure to function. Ad hoc networks has a wide range of applications such as rescue operations, military operation or at a disaster scene where rapid communication is crucial. These kinds of scenarios have different characteristics such as mobility and environment which affects routing protocol performance.

Routing protocols are evaluated through simulations with different parameters and scenarios. In order to evaluate these protocols fairly its imperative the simulation environment resembles the intended scenario of the protocol. Specifically, mobility models that resembles movement patterns in such scenarios are essential.

In this thesis, a group mobility model called OCGMM is introduced. This mobility model operates in an obstacle environment which restricts the movement more or less to pathways. For comparison reasons, a mobility model called RPGMM was implemented. This mobility model is very similar to OCGMM except that movement is not restricted to pathways and no obstacles which obstructs signal propagation exists.

In this thesis, routing protocols are evaluated with OCGMM and RPGMM. Results show that protocols perform worse in OCGMM than in RPGMM. It has been shown that scenarios with group mobility can have connectivity problems. In closing, OCGMM incorporates group mobility in an obstacle environment which fulfills characteristics some ad hoc networks might have.

Author: Kristoffersson, Jens

Source: Lulea University of Technology

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