Today’s computer network is shifting from wired networks to wireless networks. Several attempts have been made to assess the performance of TCP over wireless networks. Also, several solutions have been proposed to improve its performance. Many people believe SCTP would be replacement of TCP. However, the performance enhancement research for SCTP over wireless network is in beginning stage yet. ...

This paper proposes two schemes to improve the TCP performance over 802.11 WLAN access protocol. In the standard 802.11 and TCP protocols, a TCP data segment is acknowledged twice, once at the MAC layer, and once at the TCP layer. By a simple cross-layer design, a TCP ACK agent is installed at the WLAN AP. When a MAC acknowledgment is received by the AP, the AP generates a TCP ACK on behalf of ...

Increasing popularity of real time traffic application has lead to increase in non TCP traffic over the internet. These non TCP applications does not provide adequate congestion control compared to TCP application sharing same network thus available bandwidth is shared unfairly and may lead to stall of TCP traffic. Many TCP-Friendly protocols have been proposed that can share the available band...

TFRC (TCP Friendly Rate Control) is a rate-based congestion control protocol for non-TCP flows. TFRC controls the sending rate by using the TCP throughput equation considering the triple duplicate ACKs and the timeouts. However, this equation provides the conservative throughput bound of TCP. This conservativeness causes lower throughput and slower response time for TFRC than those for TCP. In ...

A number of TCP/IP offload engines have been developed to reduce the CPU load of processing TCP/IP, but most of them are implemented in hardware. Although hardware-based TOEs have a high performance, they lack the flexibility to accept changes in the TCP/IP. To preserve flexibility, we implemented a software-based TOE, called HLTCP 100134 (High-performance Lightweight TCP/IP). The HL-TCP is a s...

This paper describes a congestion control method for TCP that adjusts the transmission rate of a TCP connection by changing not only the congestion window size as in normal TCP, but also by delaying the transmission of packets at the sender. We refer to this method as TCP with sender-based delay control, or simply SDC. SDC can keep the window size of a TCP connection above a certain threshold e...

Plant-specific TEOSINTE-BRANCHED1/CYCLOIDEA/PCF (TCP) transcription factors play versatile functions in multiple aspects of plant growth and development. However, no systematical study has been performed in cotton. In this study, we performed for the first time the genome-wide identification and expression analysis of the TCP transcription factor family in Gossypium raimondii. A total of 38 non...

Another version of TCP called TCP Vegas has been proposed and studied in the literature. It can achieve better performance than the current TCP Reno. In our previous studies, steady-state behavior of a windowbased flow control mechanism based on TCP Vegas has been analyzed for a simple network topology. In this paper, we extend our analysis to a generic network topology where multiple bottlenec...

Research on congestion control in ad hoc networks has mostly been limited to enhancing TCP based mechanisms [1, 2, 3, 4, 5]. Explicit Link Failure Notification (ELFN [1, 2]), a solution for ad hoc TCP, has been shown to outperform TCP in mobile scenarios. Studies of TCP+ELFN on static networks show throughput degradation of about 5% in several cases over TCP, however, the improvements in dynami...

The purpose of this study was to evaluate a thin gelatin hydrogel membrane containing β-tricalcium phosphate (G-TCP) for use in guided bone regeneration, a technique that we developed. G-TCP membranes were fabricated from gelatin and β-TCP powder, freezedried, and cross-linked by heating. The resulting G-TCP membranes were as thin as collagen membranes, with high mechanical integrity. Prolifera...