Time Based TCP for High Speed Networks

TCP can perform badly in high speed networks with large delays because of its slow response with large congestion windows. In this paper, we propose Time Based TCP(TBTCP for short), a simple and novel time based technique, wherein, the congestion window increase rate is adaptively adjusted based on time intervals between two consecutive losses instead of current window size or sending rate. We first provide general framework for TBTCP protocol. Then, a simplified design is given and the scalability of TBTCP is illustrated. We analyze the RTT unfairness with the chosen design and show that the RTT unfairness of TBTCP can be firmly guaranteed to be no worse than that of unmodified TCP. A whole class of design options is provided by this flexible framework to improve the performance of TCP in high speed networks with large delays.