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The Effect of Routing-Load Dispersion on Congestion Control in Structured P2P Networks

In structured P2P networks, the heterogeneity of node capacity, the skewness in query pattern and the greedy routing strategy could result in the load imbalance problem. However, existing load balancing algorithms for structured P2P networks mainly focused on handling the heterogeneity among nodes and the skewed workload. To deal with the load imbalance issue caused by the greedy routing strategy, we propose a routing load dispersion (RLD) mechanism for structured P2P networks in this paper. The mechanism manages to disperse the routing load of queries among nodes so that more nodes have a chance to dedicate their capacities for routing. By dispersing the routing load, the RLD mechanism is able to make use of the free capacity in the network and avoid the congestion effectively. We also evaluate the RLD mechanism by extensive simulations and the simulation results demonstrate the effectiveness of RLD mechanism on congestion control under different workload and churn levels.