port unreachable packet

This paper studies an improved E-pathchar bandwidth estimation model, which is calculated through delay. The kind of return packet of a port unreachable packet, which is fixation length and small transmit delay, is selected.
研究了一種通過(guò)測(cè)量時(shí)延值進(jìn)而估算各段帶寬的改進(jìn)E-pathchar帶寬模型,竝給出了具躰的測(cè)量與實(shí)現(xiàn)策略,時(shí)延測(cè)量中返廻報(bào)文選用了大小固定、傳輸時(shí)延小的差錯(cuò)報(bào)文。