TCP responds to all losses by invoking congestion control and avoidance algorithms, resulting in degraded end-toend performance in lossy environments. In recent years, two approaches have been taken to improve the performance of TCP in such networks. One is local retransmission and the other is end

present a new wireless TCP protocol-- Endto-end Link State Aware TCP (TCP-ELSA)-- that adjusts the sending rate of a TCP flow according to the wireless link quality, but still provides good congestion control when congestion-related losses occur. The aim of TCP-ELSA is to adapt the sending rate of TCP

spatial reuse of the shared wireless channel. However, TCP grows its window size much larger than W # , leading to throughput reduction. We then explain the TCP throughput decrease using our observations and analysis of the packet loss in an overloaded multihop wireless network. We find out

an acceptable QoS level at the end systems. In this paper, we present a new scheme called the loss-delay based adjustment algorithm (LDA) for adapting the transmission rate of multimedia applications to the congestion level of the network. The LDA algorithm was designed to reduce losses and improve utilization

Although the problem of mal-performance of TCP in wireless scenario has been extensively addressed, an integrated solution has remained undeciphered. Conventionally, measures have been suggested to either adapt or shield TCP from noncongestion losses over the wireless channel. On the other hand

are retransmitted locally over the wireless links in case corruption loss is detected. Links between a sensor node and the gateway is taken into consideration. In addition, for effective adaptation to variable bandwidth, the window feedback is calculated based on the bandwidth–delay product estimation

improvement policies target either hiding non-congestion losses from the TCP sender or making the sender capable of distinguishing between channel error and congestion related packet losses. The former category of proposals relies on link-layer solutions and has been assessed as not being capable

While there is an increasing demand for streaming video applications on the Internet, various network characteristics make the deployment of these applications more challenging than traditional TCP-based applications like email and the Web. Packet loss can be detrimental to compressed video

Abstract — TCP throughput limitations over wireless links have received considerable attention in the last few years. One of the problems is that TCP congestion control interprets packet losses as an indication of congestion, whereas in wireless links, losses could be due to transient link quality

an acceptable QoS level at the end systems. In this study, we present a new scheme for adapting the transmission rate of multimedia applications to the congestion level of the network. The scheme called the direct adjustment algorithm (DAA), is based on the TCP congestion control mechanisms and relies