NCR adaptively controls TCP according to the degree of link usage asymmetry. We analyzed the aforementioned problem through the empirical study, and we designed and implemented NCR based on the analysis. To resolve this problem, this paper proposes a feedback scheme, network traffic chunk regulator (NCR).
Thus, downlink bandwidth cannot be fully utilized, which results in significantly degraded downlink throughput. When the uplink interface is congested, TCP ACK packets are delayed by TCP data packets on the uplink, causing considerable TCP retransmissions on the downlink channel. However, this asymmetry can have unexpected influence on network performance, particularly TCP performance. Therefore, most cellular network service providers allocate more bandwidth to downlinks than uplinks for mobile subscribers. Most recent wireless access technologies employ asymmetric uplinks and downlinks because mobile subscribers usually download contents from the Internet. Cellular data networks are currently the most widely used, and the number of cellular network subscriptions has increased steadily. Many varied mobile device networks have been developed with the advancement of communication and network technologies.
