Study on Variable-Structure Congestion Control Protocol
Zhi Guan · 2007
TCP’s performance degrades significantly as either bandwidth or latency increases. The most noteworthy aspect of this poor performance is the low bandwidth utilization in bottleneck. Variable-structure Congestion control Protocol (VCP) proposed by Xia addresses this problem efficiently. With VCP, each router computes a ‘load factor’, which indicates the level of network congestion, at intervals of 200ms and encodes this information into two ECN bits of each packet through the router. Due to the load factor in the packet, the source host uses different algorithms to improve bandwidth utilization and fairness respectively. Compared with other explicit congestion protocol, VCP used only two bits, but still achieves considerable performance.