Abstract: Based on the nonlinear optimal control theory，this paper presents a new algorithm of explicit Price-based Congestion control（XPCP）.According to the principle of inhere project，the XPCP algorithm adds the signal feedback of explicit price，and replaces the SumNet structure with MaxNet.And then，the results of emulator experiment suggest that the XPCP algorithm has quicker response characteristic，higher utilization rate of bandwidth.It attains the Max-Min Fairness（MMF），et al.This is proved that XPCP algorithm is feasible.

Key words: Internet, congestion control, dual algorithms

摘要： 提出了一种新的基于非线性控制理论的显式拥塞控制算法XPCP。XPCP在原有方案上增加了显式价格信号反馈，改变SumNet结构为MaxNet结构，仿真和分析表明XPCP算法具有很快的响应特性、高的带宽利用率、可以达到最大最小公平等，表明该算法是可行的。

关键词: Internet, 拥塞控制, 对偶算法