A method for improving radio Ad hoc performance based on layer-spanning collaborative mechanism

Abstract

A method for improving wireless self-organized network performance is provided by utilizing the VDSR++ cross-layer optimized technology, relating to the wireless communication technology. The method combines with a cross layer optimized protocol VDSR++ optimization strategy of a MAC layer, a network layer and a transmission layer, exerts a cross-layer mechanism DSR++ on a 802.11MAC layer and an IP layer, solves the problem of route discovery and rebuilding caused by network congestion in the wireless self-organized network; the transmission layer adopts a TCP Veno protocol to solve the problem of route discovery and rebuilding caused by high error rate in the wireless self-organized network. The utility model can improve the TCP performance in the wireless self-organized network. The method is applicable to a static wireless self-organized network SANET and a dynamic wireless self-organized network MANET.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a technology for improving the performance of a wireless ad hoc network. Background technique [0002] In wireless ad hoc networks, on-demand routing protocols (such as: DSR and AODV, etc.) are the most widely used and most commonly used routing protocols. The on-demand routing protocol is established in accordance with the requirements of the connection during the establishment of the connection. The on-demand routing protocol judges whether it needs to maintain and rebuild the route by detecting the packet loss at the MAC layer; that is, once the routing protocol discovers the packet loss at the MAC layer, it will trigger the discovery and reconstruction of the route. On-demand routing protocols in wireless ad hoc networks are highly sensitive to packet loss at the 802.11MAC layer. Through a large number of experiments, we found that once the packet loss of the...

AI Technical Summary

Problems solved by technology

So when we use the traditional TCP window mechanism in a wireless adhoc network, TCP will send as many data packets as possible to the network, but because the capacity of the wireless network link is low, congestion often occurs in the wireless link. In the road instead of the queue, resulting in packet loss due to link competition, triggering the route discovery and reconstruction mechanism

When TCP sends too many data packets to the network and exceeds a limit value, it will cause packet loss in the competition of the MAC layer, rather than packet loss in the queue of the node; it will also cause the on-demand routing protocol in the 802.11 network Triggers unnecessary route reconstructions, which degrades TCP performance

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