Performance evaluation for ground networks with an elevated node
Publish date: 2013-12-31
Report number: FOI-R--3789--SE
Pages: 27
Written in: Swedish
Keywords:
- ad hoc networks
- UAV
- airborne nodes
- base station
Abstract
In military tactical ground networks it can be hard to achieve high enough data rate. A possible solution to improve communication performance can be to add an elevated node. In this report, the performance of ground networks at 300 MHz is analyzed with and without an elevated node and for different bandwidths. Three different network architectures are also compared; direct communication, base station and ad hoc networks. Tactical military networks are often ad hoc networks, since it is a robust solution. Here, we investigate if ad hoc networks are an attractive choice when an elevated node is added to the network. Two different placements of the raised node are analyzed, directly above the network and a bit away from the ground network. The evaluation has been performed for two different types of terrain; flat and hilly terrain and also theoretically regardless of terrain data . Direct communication cannot reap the benefits of that an elevated node is added to the network and is not a good solution for a network with elevated nodes. Ad hoc networks are more robust which shows in difficult terrains, for lower heights of the elevated node or for longer distances between the ground network and the elevated node. The base station solution performs well when the elevated node is above or close to the ground network and at relatively high altitudes. In particular for the flat terrain, the two network architectures shows relatively similar results which probably means that in principle, all traffic goes through the elevated node even in the ad hoc network. To add an elevated node is an asset to the network in all scenarios, except in cases where it is far from the ground network.