Adaptive Congestion Control for Handover in Heterogeneous Mobile Content-Centric Networking

CCN (Content-Centric Networking) is receiver-driven architecture whose communication is triggered by consumer requests. When a consumer changes its access point (handover), it cannot receive requested Data packets. However, the consumer can retransmit in-flight Interest packets to a new route and reconstruct its route to obtain corresponding Data packets. Each consumer has its own parameters for congestion control, e.g. congestion window size, congestion threshold and timeout value. In the case of a handover to a heterogeneous network, e.g. from LTE to Wi-Fi, when congestion parameters set just before the handover are carried over, they probably are inadequate for new network environments. In this paper, we propose an effective receiver-driven control, Congestion Parameter Initialization. Our policy is quite simple and a consumer initializes its congestion parameters just after the handover. Our simulation results show that our proposal can adapt its congestion parameters to new network environment quickly.