document: TCP explicit congestion notification over ATM-UBR : a simulation study The enhancement of transmission control protocol 's -LRB- TCP 's -RRB- congestion control mechanisms using explicit congestion notification -LRB- ECN -RRB- over asynchronous transfer mode -LRB- ATM -RRB- networks is overviewed . TCP 's congestion control is enhanced so that congestion is indicated by not only packet losses as is currently the case but an agent implemented at the ATM network 's edge as well . The novel idea uses EFCI -LRB- explicit forward congestion indication -RRB- bits -LRB- available in every ATM cell header -RRB- to generalize the ECN response to the UBR -LRB- unspecified bit rate -RRB- service , notify congestion , and adjust the credit-based window size of the TCR . The authors ' simulation experiments show that TCP ECN achieves significantly lower cell loss , packet retransmissions , and buffer utilization , and exhibits better throughput than -LRB- non-ECN -RRB- TCP Reno
doc_bio_tags: B I I I O O O O B O O O O O O O O O O O O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O B O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B O O O O O O O O B I O B I O O B I O O O O B O O O O O O
extractive_keyphrases: tcp explicit congestion notification simulation congestion control mechanisms packet losses agent cell loss packet retransmissions buffer utilization throughput
abstractive_keyphrases: atm-ubr atm networks explicit forward congestion indication bits unspecified bit rate service credit-based window size