Multipath Congestion Control for Heterogeneous Traffic in Wireless Sensor Network

In order to achieve higher reliability and load balancing various multipath routing protocols have been proposed in Wireless Sensor Network. Moreover, wireless sensor network typically incorporates heterogeneous applications within the same network. A sensor node may have multiple sensors i.e. light, temperature, seismic etc with different transmission characteristics. Each application has different characteristics and requirements in terms of transmission rates, bandwidth, packet loss and delay demands may be initiated towards the sink. But achieving desired throughput for diverse data while disseminating through multiple paths is non trivial task as occurrence of congestion through multipath is obvious. In this paper we propose an efficient scheme to control multipath congestion so that the sink can get priority based throughput for heterogeneous data. We have used packet service ratio for detecting congestion as well as performed hop-by-hop multipath congestion control based on that metric. Finally, simulation results have demonstrated the effectiveness of our proposed approach.