ASYMMETRICAL PERFORMANCE OF HYBRID MANETS

The connection of mobile ad hoc networks into the Internet has led to the proposal of several mechanisms that complete the ad hoc routing procedures in order to facilitate a proper use of the Access Router. Most of the proposed mechanisms require a dedicated and fixed entity acting as the Internet Gateway. This demand prevents MANET from operating in scenarios prepared for one-hop Wireless LAN where a Gateway is not previously installed. One possible solution is described in the mobile multi-gateway support that transfers the gateway functionalities to a component of the MANET. Due to this transfer, multi-hop ad hoc networks get the flexibility to be integrated into the Internet in scenarios prepared for one-hop WLAN. However, this transfer also implies some significant effects on the network performance that depends on the considered traffic (uplink/downlink). This paper studies the performance of this mechanism and shows the asymmetric behavior that can be achieved when this support is employed.

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